JP7808271B2 - Transparent laminating film for partitions and partitions - Google Patents

Description

This disclosure relates to partitions and transparent laminate films for partitions.

Partitions that prevent the transfer of droplets such as saliva caused by sneezing or coughing between people facing each other have been known for some time (see, for example, Patent Document 1). Patent Document 1 discloses a partition that includes a partition panel made of a transparent acrylic plate and a stand that supports the partition panel in an upright position. Such a partition is placed between people facing each other to prevent the transfer of droplets such as saliva between the people facing each other.

Registered Utility Model No. 3232184

However, with such partitions, there is a risk that users or other individuals may be reflected in the partition due to light from indoor lighting or sunlight entering from outside being reflected off the dividing panels. If users or other individuals are reflected in the partition in this way, it may be difficult for people sitting across the partition to see each other. If it becomes difficult for people sitting across from each other to see each other in this way, the quality of communication may decline when communicating face-to-face, for example, at a hotel front desk or at a financial institution's consultation desk, where people need to see each other's facial expressions and mouth movements. For this reason, there is a demand for partitions that can improve the visibility caused by light reflection.

Furthermore, when communicating through a partition, it may be difficult for users to hear what others are saying. In this way, even if users have difficulty hearing what others are saying, the quality of communication may deteriorate.

This disclosure has been made with these points in mind, and aims to provide a partition and a transparent laminate film for a partition that effectively suppresses light reflection and makes it easier to hear what the other person is saying during a conversation.

A partition according to one embodiment comprises a transparent laminate film having a first surface and a second surface located opposite the first surface, and a film support portion that supports the transparent laminate film, the transparent laminate film including a first-surface anti-reflection layer that constitutes the first surface and a second-surface anti-reflection layer that constitutes the second surface.

In one embodiment of the partition, the transparent laminate film may further include a core layer positioned between the first-side anti-reflection layer and the second-side anti-reflection layer.

In one embodiment of the partition, the transparent laminate film may further include a first transparent adhesive layer that bonds the first-side anti-reflection layer and the core layer together, and a second transparent adhesive layer that bonds the core layer and the second-side anti-reflection layer together.

In one embodiment of the partition, the transparent laminate film may further include a transparent adhesive layer that adheres the first-side anti-reflection layer and the second-side anti-reflection layer to each other.

In one embodiment of the partition, the transparent laminate film may have a thickness of 300 μm or less.

In one embodiment of the partition, the transparent laminate film may have a light reflectance of 3.0% or less.

In one embodiment of the partition, the transparent laminate film may have a total light transmittance of 90% or more.

In one embodiment of the partition, the film support portion may support the transparent laminate film in a flattened state.

In one embodiment, the partition may further include a stand portion that supports the film support portion so that the first surface of the transparent laminate film is perpendicular to a horizontal plane.

In one embodiment of the partition, the transparent laminate film may have an upper edge, a lower edge, and side edges extending between the upper and lower edges, the film support portion may have a first groove portion formed therein into which the side edges of the transparent laminate film are inserted, a gap may be formed between the transparent laminate film and the first groove portion, and the transparent laminate film may be supported by the film support portion in a state in which it can move relative to the film support portion.

In one embodiment of the partition, the width of the first groove portion along the thickness direction of the transparent laminate film may be 0.5 mm or more and 3 mm or less.

In one embodiment of the partition, the film support portion may be formed with a second groove portion into which the lower edge of the transparent laminate film is inserted, and a gap may be formed between the transparent laminate film and the second groove portion.

In one embodiment of the partition, the width of the second groove portion along the thickness direction of the transparent laminate film may be 0.5 mm or more and 3 mm or less.

In one embodiment of the partition, the second groove portion may include a first side surface facing the first surface and a second side surface facing the second surface, and the height of the first side surface may be different from the height of the second side surface.

In one embodiment of the partition, the transparent laminate film may have an upper edge, a lower edge, and side edges extending between the upper and lower edges, and the film support portion may have a groove formed therein into which the lower edge of the transparent laminate film is inserted, the groove portion may be curved in plan view, and a gap may be formed between the transparent laminate film and the groove portion, and the transparent laminate film may be supported by the film support portion in a state in which it can move relative to the film support portion.

In one embodiment of the partition, the width of the groove along the thickness direction of the transparent laminate film may be 0.5 mm or more and 3 mm or less.

In one embodiment of the partition, the corners between the top edge and the side edges may be rounded.

One embodiment of the transparent laminate film for partitions is used in the partitions described above. It is a transparent laminate film for partitions that has a first surface and a second surface located opposite the first surface, and is equipped with a first-surface anti-reflection layer that constitutes the first surface and a second-surface anti-reflection layer that constitutes the second surface.

The building in one embodiment is a building equipped with the partition described above.

This disclosure provides a partition and a transparent laminate film for a partition that effectively suppresses light reflection and makes it easier to hear what the other person is saying.

FIG. 1A is a perspective view of a partition according to one embodiment. FIG. 1B is a perspective view of a partition according to one embodiment. FIG. 1C is a vertical cross-sectional view of the partition shown in FIG. 1A (cross-sectional view taken along line IC-IC in FIG. 1A). FIG. 2A is a cross-sectional view showing an example of a layer structure of a transparent laminate film with a protective film according to one embodiment. FIG. 2B is a cross-sectional view showing an example of a layer structure of the protective film-attached transparent laminate film according to one embodiment. FIG. 2C is a cross-sectional view showing an example of a layer structure of a transparent laminate film with a protective film according to one embodiment. FIG. 2D is a cross-sectional view showing an example of a layer structure of a transparent laminate film with a protective film according to one embodiment. FIG. 2E is a cross-sectional view showing an example of a layer structure of a transparent laminate film with a protective film according to one embodiment. FIG. 2F is a cross-sectional view showing an example of a layer structure of a transparent laminate film with a protective film according to one embodiment. FIG. 3 is a perspective view showing a first modified example of the film support portion of the partition according to the embodiment. FIG. 4 is a front view showing a first modified example of the film support portion of the partition according to the embodiment. FIG. 5 is a rear view showing a first member of a film support portion of a partition according to one embodiment. FIG. 6 is a front view showing a second member of the film support portion of the partition according to one embodiment. FIG. 7 is a cross-sectional view (cross-sectional view taken along line VII-VII in FIG. 4) showing a first modified example of the film support portion of the partition according to the embodiment. FIG. 8 is a cross-sectional view (cross-sectional view taken along line VIII-VIII in FIG. 4) showing a first modified example of the film support portion of the partition according to the embodiment. FIG. 9 is a cross-sectional view (cross-sectional view taken along line IX-IX in FIG. 4) showing a first modified example of the film support portion of the partition according to the embodiment. FIG. 10 is a cross-sectional view (cross-sectional view taken along line X-X in FIG. 4) showing a first modified example of the film support portion of the partition according to the embodiment. FIG. 11 is a perspective view showing a second modified example of the film support portion of the partition according to the embodiment. FIG. 12 is a front view showing a second modified example of the film support portion of the partition according to the embodiment. FIG. 13 is a perspective view showing a second modified example of the film support portion of the partition according to the embodiment. FIG. 14 is a perspective view showing a second modified example of the film support portion of the partition according to the embodiment. FIG. 15 is a cross-sectional view (cross-sectional view taken along line XV-XV in FIG. 12) showing a second modified example of the film support portion of the partition according to the embodiment. FIG. 16 is a cross-sectional view (cross-sectional view taken along line XVI-XVI in FIG. 12) showing a second modified example of the film support portion of the partition according to the embodiment. FIG. 17 is a cross-sectional view (cross-sectional view taken along line XVII-XVII in FIG. 12) showing a second modified example of the film support portion of the partition according to the embodiment. FIG. 18 is a diagram illustrating the puncture resistance test according to the example and the comparative example. FIG. 19 is a diagram illustrating an acoustic characteristic evaluation test according to the example and the comparative example.

The present embodiment will now be described with reference to the drawings. Figures 1A to 2F are diagrams illustrating this embodiment. The figures shown below are schematic diagrams. Therefore, the size and shape of each part have been appropriately exaggerated to facilitate understanding. Appropriate modifications can be made without departing from the technical concept. In the figures shown below, identical parts are designated by the same reference numerals, and some detailed descriptions may be omitted. Furthermore, the numerical values, such as dimensions, and material names of each component described in this specification are examples of an embodiment, and are not limited to these and can be selected and used as appropriate. In this specification, terms specifying shapes or geometric conditions, such as parallel, orthogonal, and perpendicular, are to be interpreted not only in their strict sense but also to include substantially the same state.

First, the partition 10 will be described. Figures 1A and 1B show an example of the partition 10 according to the present embodiment. Figure 1C is a vertical cross-sectional view of the partition 10 shown in Figure 1A taken along a plane perpendicular to a first surface 301 of a transparent laminate film 30 (described later) and a horizontal plane G (described later). In this specification, "upper" and "lower" refer to the upper and lower sides, respectively, of the partition 10 in an upright position (Figures 1A to 1C).

The partition 10 is placed in a room R, such as a conference room or meeting space. The partition 10 can be used to divide the space in the room R. The partition 10 may be placed on a desk T placed in the room R. In this case, the top surface of the desk T may be parallel to a horizontal plane G. The partition 10 may also be placed on the desk T, for example, between a user H1 and a user H2 facing the user H1. The partition 10 serves to prevent droplets of saliva and the like from traveling between the users H1 and H2. In FIGS. 1A and 1B, the users H1 and H2 of the partition 10 may correspond to speakers who speak in the room R. In the example shown in FIGS. 1A and 1B, the partition 10 is placed on the desk T placed inside the room R so as to block the front of the users H1 and H2 who are facing each other.

As shown in Figures 1A to 1C, the partition 10 includes a transparent laminate film 30 and a film support portion 70 that supports the transparent laminate film 30. The partition 10 may also include a stand portion 90.

The shape of the transparent laminate film 30 is not particularly limited and can be determined appropriately depending on the shape of the space partitioned by the partition 10. In the example shown in Figures 1A and 1B, the transparent laminate film 30 has a rectangular shape. The transparent laminate film 30 has a first surface 301 and a second surface 302 located on the opposite side of the first surface 301. The first surface 301 and the second surface 302 are parallel to each other. The transparent laminate film 30 also has a pair of first sides (side edges) 30a and a pair of second sides (upper and lower edges) 30b that are perpendicular to the first sides 30a. The first sides 30a are perpendicular to the horizontal plane G (see Figure 1C). The second sides 30b are parallel to the horizontal plane G. The pair of first sides (side edges) 30a extend between the pair of second sides (upper and lower edges) 30b. Other configurations of the transparent laminate film 30 will be described later.

Next, we will explain the film support section 70.

(Film support part)
As described above, the film support portion 70 supports the transparent laminate film 30. It is preferable that the film support portion 70 supports the transparent laminate film 30 in a flattened state. This makes it possible to effectively suppress light reflection on the transparent laminate film 30.

1A and 1B, the film support portion 70 has an overall rectangular frame shape. The film support portion 70 has a pair of first portions 71 and a pair of second portions 72 extending between the pair of first portions 71. The pair of first portions 71 extend linearly and perpendicular to the horizontal plane G. The pair of second portions 72 extend linearly and parallel to the horizontal plane G. The pair of first portions 71 and the pair of second portions 72 are connected to each other. Note that the manner in which the first portions 71 and the second portions 72 are connected to each other is not particularly limited. For example, the first portions 71 and the second portions 72 may be connected to each other by screwing. The first portions 71 and the second portions 72 may also be connected to each other by welding or the like.

The first portion 71 and the second portion 72 each sandwich the transparent laminate film 30 in the thickness direction of the transparent laminate film 30. Specifically, the pair of first portions 71 sandwich the periphery of the pair of first sides 30a of the transparent laminate film 30 in the thickness direction of the transparent laminate film 30. The pair of second portions 72 sandwich the periphery of the pair of second sides 30b of the transparent laminate film 30 in the thickness direction of the transparent laminate film 30. As a result, the first portion 71 of the film support portion 70 suppresses bending of the first side 30a of the transparent laminate film 30, and the second portion 72 of the film support portion 70 suppresses bending of the second side 30b of the transparent laminate film 30. This allows the transparent laminate film 30 to be supported in a flattened state.

In the example shown in FIG. 1B, the film support portion 70 has first portions 71 that sandwich the periphery of the pair of first sides 30a of the transparent laminate film 30, but does not have second portions 72 that sandwich the periphery of the pair of second sides 30b of the transparent laminate film 30. Even in the example shown in FIG. 1B, the first portions 71 of the film support portion 70 can suppress bending of the first sides 30a of the transparent laminate film 30. Furthermore, in the film support portion 70 shown in FIG. 1B, bending of the second sides 30b can be suppressed by adjusting the spacing between the pair of first portions 71. In other words, adjusting the spacing between the pair of first portions 71 can apply tension to the transparent laminate film 30, thereby suppressing bending of the second sides 30b. This allows the transparent laminate film 30 to be supported in a flattened state.

Although not shown, the film support 70 may be a member that suspends the transparent laminate film 30. For example, the film support 70 may support the vicinity of the upper second edge 30b of the pair of second edges 30b of the transparent laminate film 30, or may be fixed to the ceiling, wall, or beam of the room R. When the film support 70 supports the transparent laminate film 30 by suspending it, the film support 70 may have a weight attached near the lower second edge 30b of the pair of second edges 30b. The weight can suppress deformation of the second edge 30b of the transparent laminate film 30, thereby more stably supporting the transparent laminate film 30. The shape and material of the weight are not particularly limited, as long as it has a weight that is sufficient to suppress deformation of the second edge 30b of the transparent laminate film 30.

From the standpoint of more stably supporting the transparent laminate film 30 in a flattened state, it is preferable that the film support portion 70 have a pair of first portions 71, and it is even more preferable that it have a pair of first portions 71 and a pair of second portions 72.

The material of the film support portion 70 is not particularly limited, as long as the film support portion 70 supports the transparent laminate film 30 in a flattened state. The material of the film support portion 70 may be, for example, a metal such as aluminum, iron, or titanium, or an alloy such as stainless steel, or it may be an acrylic resin, a PET (polyethylene terephthalate) resin, vinyl chloride, or a polyolefin resin such as polyethylene polypropylene.

The configuration of the film support portion 70 is not particularly limited as long as it can support the transparent laminate film 30. The configuration of the film support portion 70 may be selected depending on factors such as the bending stress of the transparent laminate film 30.

As an example of a method in which the film support portion 70 supports the transparent laminate film 30, the transparent laminate film 30 is sandwiched between the first portion 71 and the second portion 72 in the thickness direction of the transparent laminate film 30, but this is not limited to this. For example, the transparent laminate film 30 may be fixed to a rod-shaped structure using an adhesive film. Alternatively, the transparent laminate film 30 may be attached to a metal rod-shaped structure using a magnet.

The effect of the partition 10 having the film support portion 70 will be explained. As described below, by using the transparent laminate film 30 in the partition 10, light reflection in the partition is reduced compared to a partition panel made of a typical acrylic plate. Furthermore, by using the transparent laminate film 30 in the partition 10, the transparency of the partition is improved compared to a partition panel made of a typical acrylic plate. On the other hand, the transparent laminate film 30 as described above is more easily bent than the acrylic plates used in typical partitions. When the transparent laminate film 30 bends, wrinkles (wavy shapes) may occur on the surface of the transparent laminate film 30, as described below, making it difficult for users H1 and H2 to see each other.

In contrast, by supporting the transparent laminate film 30 with the film support section 70, it is possible to suppress light reflection, improve transparency, and prevent bending of the transparent laminate film 30.

(Stand section)
Next, the stand unit 90 will be described. The stand unit 90 supports the film support unit 70 so that the first surface 301 of the transparent laminate film 30 is perpendicular to the horizontal plane G. The term "perpendicular" to the horizontal plane G of the first surface 301 of the transparent laminate film 30 is interpreted to include not only the case where the first surface 301 is perpendicular to the horizontal plane G in the strict sense, but also the case where the first surface 301 is substantially perpendicular to the horizontal plane G. "Substantially perpendicular" means, for example, that the angle between the first surface 301 and the horizontal plane G is 5° or less, or 3° or less.

In Figures 1A and 1B, the stand unit 90 has a first stand unit 91 and a second stand unit 92. The first stand unit 91 is connected to one of the first parts 71 of the film support unit 70 (the first part 71 on the left in Figures 1A and 1B). The second stand unit 92 is connected to the other of the first parts 71 of the film support unit 70 (the first part 71 on the right in Figures 1A and 1B).

In Figures 1A and 1B, the first stand portion 91 and the second stand portion 92 have a plate-shaped vertical portion 93 that extends up and down when viewed in the thickness direction of the transparent laminate film 30, and a plate-shaped horizontal portion 94 that extends horizontally when viewed in the thickness direction. The vertical portion 93 is connected to the horizontal portion 94 at its lower end. The vertical portion 93 and the horizontal portion 94 of the first stand portion 91 and the second stand portion 92 are each connected to the first portion 71 of the film support portion 70.

As shown in Figures 1A to 1C, the stand unit 90 is placed on the desk T so that the horizontal portions 94 of the first stand unit 91 and the second stand unit 92 are in surface contact with the top surface of the desk T. This allows the stand unit 90 to support the film support unit 70 so that the first surface 301 of the transparent laminate film 30 is perpendicular to the horizontal plane G.

The configuration of the stand unit 90 is not particularly limited, as long as it can support the film support unit 70. For example, the material of the stand unit 90 is not particularly limited, as long as it can support the film support unit 70. The material of the film support unit 70 may be, for example, a metal such as aluminum, iron, or titanium, or an alloy such as stainless steel, or a polyolefin resin such as acrylic resin, PET (polyethylene terephthalate) resin, vinyl chloride, or polyethylene polypropylene. The method of connecting the stand unit 90 to the film support unit 70 is not particularly limited, as long as it can support the film support unit 70. For example, the stand unit 90 may be connected to the film support unit 70 by screws. Furthermore, the stand unit 90 may be integrated with the film support unit 70 by welding or the like.

(Transparent laminate film)
Next, the transparent laminate film 30 will be described in detail. As described above, the transparent laminate film 30 is used in the partition 10. A protective film that protects the first surface 301 or the second surface 302 may be attached to the transparent laminate film 30. Here, a protective film-attached transparent laminate film 60 in which a protective film is attached to the transparent laminate film 30 will first be described. FIGS. 2A to 2F show an example of the layer structure of the protective film-attached transparent laminate film 60. As shown in FIGS. 2A to 2F, the protective film-attached transparent laminate film 60 includes the transparent laminate film 30 according to the present embodiment, a first-surface protective film 61 that protects the first surface 301 of the transparent laminate film 30, and a second-surface protective film 62 that protects the second surface 302 of the transparent laminate film 30.

The first-side protective film 61 and the second-side protective film 62 serve to prevent scratches on the first side 301 and the second side 302 of the transparent laminate film 30, respectively, and to prevent contamination of the first side 301 and the second side 302 by foreign matter, etc. The first-side protective film 61 and the second-side protective film 62 are each detachably attached to the transparent laminate film 30. The first-side protective film 61 and the second-side protective film 62 may each include an adhesive layer (not shown) and be attached to the transparent laminate film 30 via this adhesive layer. The adhesive strength of the adhesive layer may be, for example, approximately 0.05 N/25 mm or more and 5 N/25 mm or less. When using the partition 10, the first-side protective film 61 and the second-side protective film 62 are each peeled off from the transparent laminate film 30. The first-side protective film 61 and the second-side protective film 62 may be made of, for example, polyester resin or a polyolefin such as polyethylene or polypropylene.

Next, the layer structure of the transparent laminate film 30 according to this embodiment will be described. As shown in Figures 2A to 2F, the transparent laminate film 30 includes a first-side anti-reflection layer 40 that forms the first surface 301, and a second-side anti-reflection layer 50 that forms the second surface 302. As shown in Figures 2A and 2B, the transparent laminate film 30 may further include a transparent adhesive layer 31 that bonds the first-side anti-reflection layer 40 and the second-side anti-reflection layer 50 together.

Specifically, as shown in Figures 2A and 2B, the transparent laminate film 30 comprises, in this order from the first surface 301 to the second surface 302, a first-surface anti-reflection layer 40, a transparent adhesive layer 31, and a second-surface anti-reflection layer 50. In this case, in the transparent laminate film 30, the first-surface anti-reflection layer 40 is exposed outward from the first surface 301 side. In addition, in the transparent laminate film 30, the second-surface anti-reflection layer 50 is exposed outward from the second surface 302 side.

2A and 2B, the first-side anti-reflection layer 40 includes a first-side anti-reflection functional layer 41 and a first-side transparent substrate layer 42, arranged in this order from the first surface 301 to the second surface 302. The first-side anti-reflection functional layer 41 also includes a first-side refractive layer 43 and a first-side hard coat layer 44, arranged in this order from the first surface 301 to the second surface 302. The first-side refractive layer 43 also includes a first-side low refractive index layer 45 and a first-side high refractive index layer 46, arranged in this order from the first surface 301 to the second surface 302. Here, the first-side high refractive index layer 46 may include a first first-side high refractive index layer 47 and a second first-side high refractive index layer 48, arranged in this order from the first surface 301 to the second surface 302, as shown in FIG. 2B.

2A and 2B, the second-side anti-reflection layer 50 includes a second-side anti-reflection functional layer 51 and a second-side transparent substrate layer 52, arranged in this order from the second surface 302 to the first surface 301. The second-side anti-reflection functional layer 51 also includes a second-side refractive layer 53 and a second-side hard coat layer 54, arranged in this order from the second surface 302 to the first surface 301. The second-side refractive layer 53 further includes a second-side low refractive index layer 55 and a second-side high refractive index layer 56, arranged in this order from the second surface 302 to the first surface 301. Here, as shown in FIG. 2B, the second-side high refractive index layer 56 may include a first second-side high refractive index layer 57 and a second second-side high refractive index layer 58, arranged in this order from the second surface 302 to the first surface 301.

Furthermore, as shown in Figures 2C and 2D, the transparent laminate film 30 may further include a core layer 32 located between the first-side anti-reflection layer 40 and the second-side anti-reflection layer 50. In this case, the transparent laminate film 30 may further include a first transparent adhesive layer 31a that bonds the first-side anti-reflection layer 40 and the core layer 32 to each other, and a second transparent adhesive layer 31b that bonds the core layer 32 and the second-side anti-reflection layer 50 to each other.

Specifically, as shown in Figures 2C and 2D, the transparent laminate film 30 comprises, in this order from the first surface 301 to the second surface 302, a first-surface anti-reflection layer 40, a first transparent adhesive layer 31a, a core layer 32, a second transparent adhesive layer 31b, and a second-surface anti-reflection layer 50. Even in this case, the first-surface anti-reflection layer 40 is exposed outward from the first surface 301 side of the transparent laminate film 30. Furthermore, the second-surface anti-reflection layer 50 is exposed outward from the second surface 302 side of the transparent laminate film 30.

2C and 2D, the first-side anti-reflection layer 40 also includes a first-side anti-reflection functional layer 41 and a first-side transparent substrate layer 42, arranged in this order from the first surface 301 to the second surface 302. The first-side anti-reflection functional layer 41 also includes a first-side refractive layer 43 and a first-side hard coat layer 44, arranged in this order from the first surface 301 to the second surface 302. The first-side refractive layer 43 also includes a first-side low refractive index layer 45 and a first-side high refractive index layer 46, arranged in this order from the first surface 301 to the second surface 302. Here, the first-side high refractive index layer 46 may include a first first-side high refractive index layer 47 and a second first-side high refractive index layer 48, arranged in this order from the first surface 301 to the second surface 302, as shown in FIG. 2D.

2C and 2D, the second-side anti-reflection layer 50 also includes a second-side anti-reflection functional layer 51 and a second-side transparent substrate layer 52, arranged in this order from the second surface 302 to the first surface 301. The second-side anti-reflection functional layer 51 also includes a second-side refractive layer 53 and a second-side hard coat layer 54, arranged in this order from the second surface 302 to the first surface 301. The second-side refractive layer 53 also includes a second-side low refractive index layer 55 and a second-side high refractive index layer 56, arranged in this order from the second surface 302 to the first surface 301. Here, as shown in FIG. 2D, the second-side high refractive index layer 56 may also include a first second-side high refractive index layer 57 and a second second-side high refractive index layer 58, arranged in this order from the second surface 302 to the first surface 301.

As described above, in the example shown in Figures 2A to 2D, the first-side anti-reflection layer 40 has a basic configuration including a first-side high-refractive index layer 46 and a first-side low-refractive index layer 45 on the first-side transparent substrate layer 42. Also, as described above, the second-side anti-reflection layer 50 has a basic configuration including a second-side high-refractive index layer 56 and a second-side low-refractive index layer 55 on the second-side transparent substrate layer 52. The first-side high-refractive index layer 46 (second-side high-refractive index layer 56) and the first-side low-refractive index layer 45 (second-side low-refractive index layer 55) serve to provide anti-reflection functionality through optical interference.

The first-side anti-reflection layer 40 (second-side anti-reflection layer 50) may be provided with an additional medium-refractive index layer to provide anti-reflection functionality through optical interference of three or more layers, but an excessively multi-layer structure is undesirable from a cost-effectiveness perspective. Therefore, the first-side anti-reflection layer 40 (second-side anti-reflection layer 50) of this embodiment is preferably configured to provide anti-reflection functionality through optical interference with two layers: a first-side high-refractive index layer 46 (second-side high-refractive index layer 56) and a first-side low-refractive index layer 45 (second-side low-refractive index layer 55). The first-side anti-reflection layer 40 (second-side anti-reflection layer 50) may also be configured with a first-side hard coat layer 44 (second-side hard coat layer 54) with a medium refractive index, providing anti-reflection functionality through optical interference with three layers: a medium-refractive index layer, a high-refractive index layer, and a low-refractive index layer.

Also, as shown in Figures 2E and 2F, the first-surface refractive layer 43 may not include the first-surface high-refractive-index layer 46. Also, as shown in Figures 2E and 2F, the second-surface refractive layer 53 may not include the second-surface high-refractive-index layer 56.

The following describes each layer of the transparent laminate film 30.

<First-Side Antireflection Layer and Second-Side Antireflection Layer>
The first-side anti-reflection layer 40 is a layer for suppressing reflection of light incident from the first surface 301 of the transparent laminate film 30. By providing the first-side anti-reflection layer 40 to the transparent laminate film 30, light reflection on the first surface 301 of the transparent laminate film 30 can be suppressed. This improves the visibility of user H2's figure, for example, when user H1, who is on the first surface 301 side of the transparent laminate film 30, visually recognizes user H2, who is on the second surface 302 side of the transparent laminate film 30. More specifically, when user H1 visually recognizes user H2, reflection of user H1's own face, etc., on the first surface 301 of the transparent laminate film 30 can be suppressed. This prevents user H1 from having difficulty visually recognizing user H2's figure. This improves the visibility of user H2's facial expressions and lip movements, for example, from user H1. This allows for smooth communication between user H1 and user H2. Furthermore, the user H1 can be prevented from feeling discomfort or fatigue due to light reflected on the first surface 301 of the transparent laminate film 30.

On the other hand, the second-side anti-reflection layer 50 is a layer for suppressing reflection of light incident from the second surface 302 of the transparent laminate film 30. By providing the second-side anti-reflection layer 50 to the transparent laminate film 30, light reflection on the second surface 302 of the transparent laminate film 30 can be suppressed. This improves the visibility of user H1, for example, when user H2, who is on the second surface 302 side of the transparent laminate film 30, visually recognizes user H1, who is on the first surface 301 side of the transparent laminate film 30. More specifically, when user H2 visually recognizes user H1, reflection of user H2's own face, etc., on the second surface 302 of the transparent laminate film 30 can be suppressed. This prevents user H1 from being difficult to recognize from user H2. This improves the visibility of user H1's facial expressions and lip movements, for example, from user H2. This facilitates smooth communication between user H1 and user H2. Furthermore, it is possible to prevent user H2 from feeling discomfort or fatigue due to light reflected on the second surface 302 of the transparent laminate film 30.

As described above, the first-side anti-reflection layer 40 has a first-side anti-reflection functional layer 41 and a first-side transparent substrate layer 42. Also, as described above, the second-side anti-reflection layer 50 has a second-side anti-reflection functional layer 51 and a second-side transparent substrate layer 52. Here, we will first explain the first-side transparent substrate layer 42 and the second-side transparent substrate layer 52.

[First-side transparent substrate layer and second-side transparent substrate layer]
The first-side transparent substrate layer 42 and the second-side transparent substrate layer 52 are layers that support the first-side antireflection functional layer 41 and the second-side antireflection functional layer 51, for example, and also increase the overall strength of the first-side antireflection layer 40 and the second-side antireflection layer 50. There are no particular restrictions on the material for the first-side transparent substrate layer 42 and the second-side transparent substrate layer 52, as long as they are transparent materials that are commonly used as substrates for films; however, from the standpoints of material cost, productivity, etc., plastic films, plastic sheets, etc. are preferably used, and these can be selected appropriately depending on the application.

Materials for plastic films or sheets include various synthetic resins. Preferred synthetic resins include cellulose resins such as triacetyl cellulose (TAC), diacetyl cellulose, acetate butyrate cellulose, and cellophane; polyester resins such as polyethylene terephthalate (PET), polybutylene terephthalate, polyethylene naphthalate-isophthalate copolymer, and polyester-based thermoplastic elastomers; polyolefin resins such as low-density polyethylene (including linear low-density polyethylene), medium-density polyethylene, high-density polyethylene, ethylene-α-olefin copolymer, polypropylene, polymethylpentene, polybutene, ethylene-propylene copolymer, propylene-butene copolymer, olefin-based thermoplastic elastomers, and mixtures thereof; acrylic resins such as polymethyl(meth)acrylate, polyethyl(meth)acrylate, and polybutyl(meth)acrylate; polyamide resins such as nylon 6 and nylon 66; polystyrene resin; polycarbonate resin; polyarylate resin; and polyimide resin. Furthermore, the material of the first surface transparent substrate layer 42 and the second surface transparent substrate layer 52 may be a cycloolefin polymer (COP) resin or a cycloolefin copolymer (COC) resin.

The first-side transparent substrate layer 42 and the second-side transparent substrate layer 52 can be made from the above-mentioned plastic films and plastic sheets, either alone or as a mixture of two or more of them. However, from the standpoints of flexibility, toughness, transparency, etc., cellulose resin and polyester resin are more preferred as materials for the first-side transparent substrate layer 42 and the second-side transparent substrate layer 52. Furthermore, from the standpoints of flexibility, toughness, transparency, etc., the first-side transparent substrate layer 42 and the second-side transparent substrate layer 52 preferably contain triacetyl cellulose and polyethylene terephthalate.

The thicknesses of the first-side transparent substrate layer 42 and the second-side transparent substrate layer 52 are not particularly limited and can be selected appropriately depending on the application. The thicknesses of the first-side transparent substrate layer 42 and the second-side transparent substrate layer 52 may each be approximately 5 μm to 130 μm, but considering durability and ease of handling, a thickness of 10 μm to 100 μm is preferred. The thickness of each layer can be calculated by measuring the thickness at three locations on a cross-sectional image taken using, for example, a scanning electron microscope (SEM) or a scanning transmission electron microscope (STEM) and averaging the values at these three locations. When measuring film thicknesses on the order of μm, SEM is preferred; when measuring film thicknesses on the order of nm, STEM is preferred. For SEM, the acceleration voltage is preferably 1 kV to 10 kV, and for STEM, the acceleration voltage is preferably 10 kV to 30 kV. The film thickness of each layer described below can also be measured using the same method as for the film thickness of the first-side transparent substrate layer 42 and the second-side transparent substrate layer 52.

[First-Side Antireflection Functional Layer and Second-Side Antireflection Functional Layer]
Next, we will explain the first-side antireflection functional layer 41 and the second-side antireflection functional layer 51. The first-side antireflection functional layer 41 and the second-side antireflection functional layer 51 serve to impart the function of suppressing light reflection to the first-side antireflection layer 40 and the second-side antireflection layer 50, respectively.

The first-side anti-reflection functional layer 41 may be a coating layer coated on the first-side transparent substrate layer 42, and the second-side anti-reflection functional layer 51 may be a coating layer coated on the second-side transparent substrate layer 52. In this way, by having the first-side anti-reflection functional layer 41 and the second-side anti-reflection functional layer 51 be coating layers, the thicknesses of the first-side anti-reflection functional layer 41 and the second-side anti-reflection functional layer 51 can be easily controlled, and desired functions such as the light reflectance and total light transmittance of the transparent laminate film 30 can be easily controlled.

The first-side anti-reflection functional layer 41 and the second-side anti-reflection functional layer 51 are preferably each made of a cured product containing an acrylic monomer. This makes it possible to form a first-side anti-reflection functional layer 41 and a second-side anti-reflection functional layer 51 with high uniformity even with short processing times.

Here, as described above, the first-side anti-reflection functional layer 41 includes a first-side refraction layer 43 and a first-side hard coat layer 44. Also, as described above, the second-side anti-reflection functional layer 51 includes a second-side refraction layer 53 and a second-side hard coat layer 54. The first-side hard coat layer 44 may be a coating layer coated on the first-side transparent substrate layer 42, and the first-side refraction layer 43 may be a coating layer coated on the first-side hard coat layer 44. Also, the second-side hard coat layer 54 may be a coating layer coated on the second-side transparent substrate layer 52, and the second-side refraction layer 53 may be a coating layer coated on the second-side hard coat layer 54. In this way, because the first surface refractive layer 43, first surface hard coat layer 44, second surface refractive layer 53, and second surface hard coat layer 54 are coating layers, the thickness of each layer can be easily controlled, and desired functions such as the light reflectance, total light transmittance, and in some cases color of the transparent laminate film 30 can be easily controlled.

Next, we will explain the first-side hard coat layer 44 and the second-side hard coat layer 54.

{First-side hard coat layer and second-side hard coat layer}
The first-side hard coat layer 44 and the second-side hard coat layer 54 serve to improve the scratch resistance of the first-side antireflection layer 40 and the second-side antireflection layer 50. Here, "hard coat" refers to a property that exhibits a hardness of "H" or higher in the pencil hardness test specified in JIS K5600-5-4:1999. The first-side hard coat layer 44 and the second-side hard coat layer 54 can be formed, for example, from a hard coat layer coating liquid containing a curable resin composition. Examples of the curable resin composition include a thermosetting resin composition or an ionizing radiation-curable resin composition, with ionizing radiation-curable resin compositions being preferred from the viewpoint of scratch resistance.

A thermosetting resin composition is a composition that contains at least a thermosetting resin and cures when heated. Examples of thermosetting resins include acrylic resins, urethane resins, phenolic resins, urea melamine resins, epoxy resins, unsaturated polyester resins, and silicone resins. Thermosetting resin compositions contain these curable resins and, if necessary, a curing agent.

An ionizing radiation-curable resin composition is a composition containing a compound having an ionizing radiation-curable functional group (hereinafter also referred to as an "ionizing radiation-curable compound"). Examples of the ionizing radiation-curable functional group include ethylenically unsaturated bond groups such as (meth)acryloyl groups, vinyl groups, and allyl groups, as well as epoxy groups and oxetanyl groups. The ionizing radiation-curable compound is preferably a compound having an ethylenically unsaturated bond group, more preferably a compound having two or more ethylenically unsaturated bond groups, and even more preferably a polyfunctional (meth)acrylate compound having two or more ethylenically unsaturated bond groups. Either a monomer or an oligomer can be used as the polyfunctional (meth)acrylate compound. Ionizing radiation refers to electromagnetic waves or charged particle beams that have an energy quantum capable of polymerizing or crosslinking molecules; ultraviolet (UV) rays or electron beams (EB) are usually used, but other types of electromagnetic waves such as X-rays and gamma rays, as well as charged particle beams such as alpha rays and ion beams can also be used.

Among the polyfunctional (meth)acrylate compounds, bifunctional (meth)acrylate monomers include ethylene glycol di(meth)acrylate, bisphenol A tetraethoxydiacrylate, bisphenol A tetrapropoxydiacrylate, and 1,6-hexanediol diacrylate. Trifunctional or higher functional (meth)acrylate monomers include trimethylolpropane tri(meth)acrylate, pentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, dipentaerythritol hexa(meth)acrylate, dipentaerythritol tetra(meth)acrylate, and isocyanuric acid-modified tri(meth)acrylate. Furthermore, the above (meth)acrylate monomers may be monomers whose molecular skeletons are partially modified, such as monomers modified with ethylene oxide, propylene oxide, caprolactone, isocyanuric acid, alkyl, cyclic alkyl, aromatic, bisphenol, or the like.

Examples of polyfunctional (meth)acrylate oligomers include acrylate polymers such as urethane (meth)acrylate, epoxy (meth)acrylate, polyester (meth)acrylate, and polyether (meth)acrylate. Urethane (meth)acrylates can be obtained, for example, by reacting a polyhydric alcohol and an organic diisocyanate with a hydroxy (meth)acrylate. Preferred epoxy (meth)acrylates include (meth)acrylates obtained by reacting a trifunctional or higher aromatic epoxy resin, alicyclic epoxy resin, aliphatic epoxy resin, or the like with (meth)acrylic acid; (meth)acrylates obtained by reacting a difunctional or higher aromatic epoxy resin, alicyclic epoxy resin, aliphatic epoxy resin, or the like with a polybasic acid and (meth)acrylic acid; and (meth)acrylates obtained by reacting a difunctional or higher aromatic epoxy resin, alicyclic epoxy resin, aliphatic epoxy resin, or the like with a phenol and (meth)acrylic acid. The above ionizing radiation-curable compounds can be used alone or in combination of two or more.

When the ionizing radiation-curable compound is an ultraviolet-curable compound, the ionizing radiation-curable composition preferably contains additives such as a photopolymerization initiator or a photopolymerization accelerator. Examples of photopolymerization initiators include one or more selected from acetophenone, benzophenone, α-hydroxyalkylphenone, Michler's ketone, benzoin, benzyl methyl ketal, benzoyl benzoate, α-acyloxime ester, and thioxanthones. These photopolymerization initiators preferably have a melting point of 100°C or higher. By ensuring that the melting point of the photopolymerization initiator is 100°C or higher, it is possible to prevent residual photopolymerization initiator from sublimating due to heat during transparent conductive film formation or the crystallization process, thereby preventing the reduction in resistance of the transparent conductive film. The same applies when using photopolymerization initiators in the high-refractive index layer and low-refractive index layer described below. The photopolymerization accelerator is a material that reduces polymerization inhibition caused by air during curing and accelerates the curing rate, and examples include one or more types selected from p-dimethylaminobenzoic acid isoamyl ester, p-dimethylaminobenzoic acid ethyl ester, etc.

The thickness of the first-side hard coat layer 44 and the second-side hard coat layer 54 is preferably in the range of 0.1 μm to 100 μm, and more preferably in the range of 0.8 μm to 20 μm. If the thickness of the first-side hard coat layer 44 and the second-side hard coat layer 54 is within the above range, sufficient hard coat performance is obtained, and the layer is resistant to cracks and breakage due to external impacts.

The refractive index of the first-side hard coat layer 44 and the second-side hard coat layer 54 is preferably smaller than the refractive index of the first-side high refractive index layer 46 and the second-side high refractive index layer 56, more preferably 1.45 to 1.70, and even more preferably 1.45 to 1.60. When the refractive index of the first-side hard coat layer 44 and the second-side hard coat layer 54 is within this range, the first-side hard coat layer 44 and the second-side hard coat layer 54 each function as a medium refractive index layer. This enables interference between the three layers of the first-side hard coat layer 44, first-side high refractive index layer 46, and first-side low refractive index layer 45, as well as interference between the three layers of the second-side hard coat layer 54, second-side high refractive index layer 56, and second-side low refractive index layer 55. This effectively suppresses light reflection. Furthermore, from the viewpoint of suppressing interference fringes, it is preferable to reduce the difference between the refractive index of the first-side hard coat layer 44 and the second-side hard coat layer 54 and the refractive index of the first-side transparent substrate layer 42 and the second-side transparent substrate layer 52.

Methods for imparting the first-side hard coat layer 44 and the second-side hard coat layer 54 with the function of a medium refractive index layer include blending a high-refractive index resin into the hard coat layer coating solution and blending high-refractive index particles. Blending high-refractive index particles can cause whitening or coating defects due to particle aggregation, so the former method (blending a high-refractive index resin) is preferred. Examples of high-refractive index resins include the above-mentioned thermosetting resins or ionizing radiation-curable compounds into which sulfur-, phosphorus-, or bromine-containing groups or aromatic rings have been introduced. Examples of high-refractive index particles that can be used are the same as the high-refractive index particles used in the first-side high-refractive index layer 46 and the second-side high-refractive index layer 56 described below.

The refractive index of each layer, such as the first-side hard coat layer 44 and the second-side hard coat layer 54, can be calculated, for example, by fitting the reflection spectrum measured with a reflectance photometer to the reflection spectrum calculated from an optical model of a multilayer thin film using Fresnel coefficients.

The first-side hard coat layer 44 and the second-side hard coat layer 54 can be formed by preparing a coating solution for forming a hard coat layer using the curable resin composition described above, and optionally additives such as an ultraviolet absorber and a leveling agent, and a dilution solvent; applying the coating solution to a transparent substrate using a conventional coating method; drying the coating solution; and, if necessary, curing the coating solution by irradiating it with ionizing radiation.

{First surface refractive layer and second surface refractive layer}
Next, the first-surface refraction layer 43 and the second-surface refraction layer 53 will be described. The first-surface refraction layer 43 and the second-surface refraction layer 53 serve to reduce the light reflectance of the first-surface anti-reflection layer 40 and the second-surface anti-reflection layer 50. As described above, the first-surface refraction layer 43 includes a first-surface low-refractive index layer 45 and a first-surface high-refractive index layer 46. As described above, the second-surface refraction layer 53 includes a second-surface low-refractive index layer 55 and a second-surface high-refractive index layer 56. Here, the first-surface low-refractive index layer 45 and the second-surface low-refractive index layer 55 will first be described.

(First-Side Low Refractive Index Layer and Second-Side Low Refractive Index Layer)
The first-side low refractive index layer 45 and the second-side low refractive index layer 55 are layers provided on the first-side high refractive index layer 46 and the second-side high refractive index layer 56, and use the difference in refractive index between them to reduce the light reflectance of the first-side anti-reflection layer 40 and the second-side anti-reflection layer 50 through interference. In order to provide the first-side anti-reflection layer 40 and the second-side anti-reflection layer 50 with ultra-low reflectance, the first-side low refractive index layer 45 and the second-side low refractive index layer 55 preferably have a refractive index of 1.26 or more and 1.40 or less, more preferably 1.28 or more and 1.38 or less, and even more preferably 1.30 or more and 1.32 or less. The lower the refractive index of the first-side low-refractive index layer 45 and the second-side low-refractive index layer 55, the lower the refractive index of the first-side anti-reflection layer 40 and the second-side anti-reflection layer 50 can be without significantly increasing the refractive index of the first-side high-refractive index layer 46 and the second-side high-refractive index layer 56. On the other hand, if the refractive index of the first-side low-refractive index layer 45 and the second-side low-refractive index layer 55 is made too low, the strength of the first-side low-refractive index layer 45 and the second-side low-refractive index layer 55 tends to decrease. Therefore, by setting the refractive index of the first-side low-refractive index layer 45 and the second-side low-refractive index layer 55 within the above-mentioned ranges, the amount of high-refractive index particles (described below) added to the first-side high-refractive index layer 46 and the second-side high-refractive index layer 56 can be reduced while maintaining the strength of the first-side low-refractive index layer 45 and the second-side low-refractive index layer 55, which is advantageous in that it leads to suppression of color and whitening. The thickness of each of the first-side low-refractive-index layer 45 and the second-side low-refractive-index layer 55 is preferably 80 nm to 120 nm, more preferably 85 nm to 110 nm, and even more preferably 90 nm to 105 nm. The first-side low-refractive-index layer 45 and the second-side low-refractive-index layer 55 may each be formed from a plurality of layers satisfying the above-mentioned refractive index ranges, but from the viewpoint of cost-effectiveness, two or less layers are preferred, and a single layer is more preferred.

Methods for forming the first-side low refractive index layer 45 and the second-side low refractive index layer 55 can be broadly divided into wet methods and dry methods. Wet methods include a sol-gel method using metal alkoxides or the like, a method of applying a low refractive index resin such as fluororesin, and a method of applying a low refractive index layer-forming coating liquid in which low refractive index particles are incorporated into a resin composition. Dry methods include a method of selecting particles with the desired refractive index from the low refractive index particles described below and forming the layers by physical vapor deposition or chemical vapor deposition. Wet methods are superior in terms of production efficiency, and in this embodiment, among wet methods, it is preferable to use a low refractive index layer-forming coating liquid in which low refractive index particles are incorporated into a resin composition.

Low refractive index particles are preferably used to lower the refractive index, i.e., to improve anti-reflection properties. They can be inorganic, such as silica or magnesium fluoride, or organic, without restriction. However, from the perspective of further improving anti-reflection properties and ensuring good surface hardness, particles with a structure that contains voids themselves are preferred.

Particles with a porous structure have microscopic voids inside them, which are filled with a gas such as air with a refractive index of 1.0, resulting in a low refractive index. Examples of such void-containing particles include inorganic or organic porous particles and hollow particles, such as porous silica, hollow silica particles, and porous polymer particles or hollow polymer particles made from acrylic resins. Preferred examples of inorganic particles include voided silica particles prepared using the technology disclosed in JP 2001-233611 A. Preferred examples of organic particles include hollow polymer particles prepared using the technology disclosed in JP 2002-80503 A. The refractive index of the voided silica or porous silica described above is in the range of 1.18 to 1.44, which is lower than that of typical silica particles, which have a refractive index of approximately 1.45. Therefore, these particles are preferred from the perspective of achieving a low refractive index for the first-side low refractive index layer 45 and the second-side low refractive index layer 55.

Hollow silica particles are particles that function to lower the refractive index of the first-side low refractive index layer 45 and the second-side low refractive index layer 55 while maintaining their coating strength. The hollow silica particles used in this embodiment are silica particles with a structure that has internal cavities. Hollow silica particles have a refractive index that decreases in inverse proportion to the occupancy rate of the internal cavities compared to the inherent refractive index of the silica particle (refractive index n = approximately 1.45). Therefore, the refractive index of the hollow silica particles as a whole is 1.18 or more and 1.44 or less.

Hollow silica particles are not particularly limited, but examples include particles that have an outer shell and are porous or hollow inside, such as silica particles prepared using the techniques disclosed in JP-A-6-330606, JP-A-7-013137, JP-A-7-133105, and JP-A-2001-233611.

The average particle diameter of the primary particles of the low-refractive-index particles is preferably 5 nm to 200 nm, more preferably 5 nm to 100 nm, and even more preferably 10 nm to 80 nm. As long as the average particle diameter of the primary particles is within this range, the transparency of the first-side low-refractive-index layer 45 and the second-side low-refractive-index layer 55 is not impaired and a good particle dispersion state is achieved. In particular, hollow particles with an average particle diameter of 70 nm to 80 nm are used as the low-refractive-index particles, and these hollow particles are advantageous in that they can increase the porosity and lower the refractive index while maintaining an outer shell thickness that does not result in insufficient strength, and also provide an excellent balance with the ideal thickness (approximately 100 nm) of the first-side low-refractive-index layer 45 and the second-side low-refractive-index layer 55 for lowering reflectivity.

The low-refractive-index particles used in this embodiment are preferably surface-treated particles. Surface treatment with a silane coupling agent is more preferred as the surface treatment of the low-refractive-index particles, and among these, surface treatment with a silane coupling agent having a (meth)acryloyl group is preferred. By subjecting the low-refractive-index particles to a surface treatment, the affinity with the binder resin described below is improved, the particles are more uniformly dispersed, and aggregation of particles is less likely to occur. This prevents a decrease in the transparency of the first-side low-refractive-index layer 45 and the second-side low-refractive-index layer 55 due to particle size increase caused by aggregation, as well as a decrease in the coatability of the layer-forming composition and the coating strength of the composition.

Furthermore, when the silane coupling agent has a (meth)acryloyl group, the silane coupling agent is ionizing radiation-curable and therefore readily reacts with the binder resin described below, thereby effectively fixing the low refractive index particles to the binder resin in the coating film of the layer-forming composition. In other words, the low refractive index particles function as a crosslinker in the binder resin. This provides a tightening effect for the entire coating film, making it possible to impart excellent surface hardness to the first-side low refractive index layer 45 and the second-side low refractive index layer 55 while retaining the inherent flexibility of the binder resin. Therefore, the first-side low refractive index layer 45 and the second-side low refractive index layer 55 utilize their own flexibility to deform, providing them with the ability to absorb and recover from external impacts, thereby reducing the occurrence of scratches and resulting in a layer with excellent surface hardness and scratch resistance.

Examples of silane coupling agents preferably used in the surface treatment of low refractive index particles include 3-(meth)acryloxypropyltrimethoxysilane, 3-(meth)acryloxypropyltriethoxysilane, 3-(meth)acryloxypropylmethyldimethoxysilane, 3-(meth)acryloxypropylmethyldiethoxysilane, 2-(meth)acryloxypropyltrimethoxysilane, and 2-(meth)acryloxypropyltriethoxysilane.

The content of low-refractive-index particles in the first-side low-refractive-index layer 45 and the second-side low-refractive-index layer 55 is preferably 10 to 250 parts by weight, more preferably 50 to 200 parts by weight, and even more preferably 100 to 180 parts by weight, per 100 parts by weight of the resin in the first-side low-refractive-index layer 45 and the second-side low-refractive-index layer 55, respectively. When the content of low-refractive-index particles is within the above range, good anti-reflection properties and surface hardness are obtained. Furthermore, the proportion of hollow particles and/or porous particles in the total low-refractive-index particles contained in the first-side low-refractive-index layer 45 and the second-side low-refractive-index layer 55 is preferably 70% by weight or more, more preferably 80% by weight or more, and even more preferably 80% by weight or more and 95% by weight or less.

The resin composition contained in the layer-forming coating liquid can be a curable resin composition. The same materials as those exemplified in the description of the first-side hard coat layer 44 and the second-side hard coat layer 54 can be used as the curable resin composition, with an ionizing radiation-curable resin composition being preferred. Also preferred as the resin composition are fluorine-containing polymers and fluorine monomers that themselves exhibit a low refractive index. Fluorine-containing polymers are polymers of polymerizable compounds that contain at least fluorine atoms in the molecule, and are suitable for imparting antifouling properties and slip properties. The fluorine-containing polymer is preferably a polymer that has reactive groups in the molecule and functions as a curable resin composition, and more preferably a polymer that has ionizing radiation-curable reactive groups and functions as an ionizing radiation-curable resin composition.

The fluorine-containing polymer is preferably a polymer containing silicon as well as fluorine, in order to not only repel dirt from the surface of the low refractive index layer but also to provide wipeability for the repelled dirt. For example, a silicone-containing vinylidene fluoride copolymer, in which a silicone component is incorporated into the copolymer, is preferred. Examples of silicone components in this case include (poly)dimethylsiloxane, (poly)diethylsiloxane, (poly)diphenylsiloxane, (poly)methylphenylsiloxane, alkyl-modified (poly)dimethylsiloxane, azo-group-containing (poly)dimethylsiloxane, dimethylsilicone, phenylmethylsilicone, alkyl-aralkyl-modified silicone, fluorosilicone, polyether-modified silicone, fatty acid ester-modified silicone, methylhydrogen silicone, silanol-group-containing silicone, alkoxy-group-containing silicone, phenol-group-containing silicone, methacrylic-modified silicone, acrylic-modified silicone, amino-modified silicone, carboxylic acid-modified silicone, carbinol-modified silicone, epoxy-modified silicone, mercapto-modified silicone, fluorine-modified silicone, and polyether-modified silicone. Among these, components having a dimethylsiloxane structure are preferred as silicone components.

The first-side low refractive index layer 45 and the second-side low refractive index layer 55 can be formed, for example, by preparing a layer-forming coating liquid using low refractive index particles, a resin composition, and additives such as UV absorbers and leveling agents, if necessary, and a diluting solvent, and then applying the coating liquid to the first-side high refractive index layer 46 or the second-side high refractive index layer 56 using a conventional coating method, drying, and, if necessary, curing by exposure to ionizing radiation.

(First-Surface High Refractive Index Layer and Second-Surface High Refractive Index Layer)
The first-side high refractive index layer 46 and the second-side high refractive index layer 56 serve to reduce the light reflectance of the first-side anti-reflection layer 40 and the second-side anti-reflection layer 50 through interference, utilizing the difference in refractive index between them and the first-side low refractive index layer 45 and the second-side low refractive index layer 55. The first-side high refractive index layer 46 and the second-side high refractive index layer 56 can each be formed from a layer-forming coating liquid containing, for example, a curable resin composition and high refractive index particles.

The first-side high-refractive-index layer 46 and the second-side high-refractive-index layer 56 preferably have a high refractive index from the perspective of achieving ultra-low reflectivity for the first-side anti-reflection layer 40 and the second-side anti-reflection layer 50. However, a high refractive index requires a large amount of high-refractive-index particles, which can lead to aggregation of the high-refractive-index particles and cause whitening. Therefore, the refractive index is preferably 1.55 to 1.85, and more preferably 1.56 to 1.70. Furthermore, the thickness of the first-side high-refractive-index layer 46 and the second-side high-refractive-index layer 56 is preferably 200 nm or less, and more preferably 50 nm to 180 nm. If the first-side high-refractive-index layer 46 and the second-side high-refractive-index layer 56 each have a two-layer structure as described below, it is preferable that the total thickness of the two layers satisfy the above-mentioned value. Furthermore, the first-side high-refractive-index layer 46 and the second-side high-refractive-index layer 56 may be formed from multiple layers satisfying the above-mentioned refractive index range. However, from a cost-effective perspective, two or fewer layers are preferred, and a single layer is more preferred.

High-refractive-index particles include antimony pentoxide (1.79), zinc oxide (1.90), titanium oxide (2.3 to 2.7), cerium oxide (1.95), tin-doped indium oxide (1.95 to 2.00), antimony-doped tin oxide (1.75 to 1.85), yttrium oxide (1.87), and zirconium oxide (2.10). The values in parentheses indicate the refractive index of each particle material. Among these high-refractive-index particles, particles with a refractive index exceeding 2.0 are preferred, as they can achieve the desired refractive index with a small amount of addition. Furthermore, conductive high-refractive-index particles such as antimony pentoxide, tin-doped indium oxide (ITO), and antimony-doped tin oxide (ATO) have free electrons whose plasma frequency is in the near-infrared range. Due to the plasma oscillation of these free electrons, some light in the visible light range is absorbed or reflected, making it difficult to suppress color. For this reason, it is preferable that the high-refractive-index particles be non-conductive. For these reasons, titanium oxide and zirconium oxide are preferred among the high-refractive index particles exemplified above, with zirconium oxide being the most suitable from the viewpoint of its high durability and stability, including light resistance. If it is desired to impart antistatic properties to the first-side anti-reflection layer 40 and the second-side anti-reflection layer 50, it is preferable to form the first-side high-refractive index layer 46 and the second-side high-refractive index layer 56 into a two-layer structure as described below, with one of the layers containing conductive high-refractive index particles.

The average particle size of the primary particles of the high refractive index particles is preferably 5 nm or more and 200 nm or less, more preferably 5 nm or more and 100 nm or less, and even more preferably 10 nm or more and 80 nm or less. The average particle size of the primary particles of the high refractive index particles and the low refractive index particles described later can be calculated by the following steps (1) to (3).
(1) A surface image of the particles themselves or a material obtained by coating and drying a dispersion of particles on a transparent substrate is taken using an SEM, TEM, or STEM.
(2) Randomly extract 10 particles from the surface image, measure the major and minor axes of each particle, and calculate the particle diameter of each particle from the average of the major and minor axes. The major axis is the longest axis on the screen, and the minor axis is the distance between the two points where a line segment perpendicular to the midpoint of the line segment constituting the major axis intersects with the particle.
(3) The same procedure is carried out five times by photographing different images of the same sample, and the value obtained by averaging the particle diameters of a total of 50 particles is taken as the average particle diameter.
When calculating the average particle size of particles, if the calculated average particle size is on the order of μm, it is preferable to use an SEM, and if the calculated average particle size is on the order of nm, it is preferable to use a transmission electron microscope (TEM) or STEM. In the case of an SEM, the acceleration voltage is preferably 1 kV or more and 10 kV or less, and in the case of a TEM or STEM, the acceleration voltage is preferably 10 kV or more and 30 kV or less.

From the viewpoint of achieving a balance between increasing the refractive index, suppressing color tone, and suppressing whitening, the content of the high refractive index particles is preferably 30 parts by mass or more and 400 parts by mass or less, more preferably 50 parts by mass or more and 200 parts by mass or less, and even more preferably 80 parts by mass or more and 150 parts by mass or less, relative to 100 parts by mass of the curable resin composition.

The first-surface high-refractive-index layer 46 and the second-surface high-refractive-index layer 56 are preferably dispersion-stabilized to prevent excessive aggregation of the high-refractive-index particles. One example of a dispersion-stabilization method is to add, to the base high-refractive-index particles, other high-refractive-index particles with a lower surface charge than the base high-refractive-index particles. This method allows the base high-refractive-index particles to appropriately gather around the other high-refractive-index particles, preventing excessive aggregation of the base high-refractive-index particles. Other dispersion-stabilization methods include using surface-treated high-refractive-index particles or adding a dispersant to the layer-forming coating liquid.

The curable resin composition forming the first-side high refractive index layer 46 and the second-side high refractive index layer 56 can be the same materials as those exemplified in the description of the first-side hard coat layer 44 and the second-side hard coat layer 54, with an ionizing radiation-curable resin composition being preferred. Furthermore, to achieve the above-mentioned refractive index without adding an excessive amount of high refractive index particles, it is preferable to use a curable resin composition with a high refractive index. The refractive index of the curable resin composition is preferably approximately 1.54 or more and 1.70 or less.

As described above, the first-side high refractive index layer 46 may include a first first-side high refractive index layer 47 and a second first-side high refractive index layer 48. In this case, it is preferable that the refractive index of the first first-side high refractive index layer 47 be higher than the refractive index of the second first-side high refractive index layer 48. This increases the refractive index difference between the first-side high refractive index layer 46 and the first-side low refractive index layer 45, lowering the reflectance of the first-side anti-reflection layer 40, and reducing the refractive index difference between the first-side high refractive index layer 46 and the first-side hard coat layer 44, thereby suppressing the occurrence of interference fringes.

As described above, the second-side high refractive index layer 56 may include a first second-side high refractive index layer 57 and a second second-side high refractive index layer 58. In this case, as with the first-side high refractive index layer 46, it is preferable that the refractive index of the first second-side high refractive index layer 57 be higher than the refractive index of the second second-side high refractive index layer 58. This increases the refractive index difference between the second-side high refractive index layer 56 and the second-side low refractive index layer 55, thereby lowering the reflectance of the second-side anti-reflection layer 50 and reducing the refractive index difference between the second-side high refractive index layer 56 and the second-side hard coat layer 54, thereby suppressing the occurrence of interference fringes.

Furthermore, when the first-side high refractive index layer 46 and the second-side high refractive index layer 56 each have a two-layer structure, the refractive index of the first first-side high refractive index layer 47 and the first second-side high refractive index layer 57 is preferably 1.60 or more and 1.85 or less, and the refractive index of the second first-side high refractive index layer 48 and the second second-side high refractive index layer 58 is preferably 1.55 or more and 1.70 or less. Furthermore, in the above two-layer structure, it is preferable that one layer contains conductive high refractive index particles and the other layer contains non-conductive high refractive index particles, and that the thickness of the layer containing the conductive high refractive index particles is less than the thickness of the layer containing the non-conductive high refractive index particles. This structure can impart antistatic properties while minimizing the amount of conductive high refractive index particles that can cause coloration. Furthermore, conductive high refractive index particles are advantageous in that they can be networked within the layer to impart antistatic properties with a small amount, thereby suppressing coloration and whitening.

The first-side high refractive index layer 46 and the second-side high refractive index layer 56 can be formed by preparing a layer-forming coating solution using high refractive index particles, a curable resin composition, and additives such as UV absorbers and leveling agents, if necessary, and a dilution solvent, and then applying the coating solution to the first-side hard coat layer 44 or the second-side hard coat layer 54 using a conventional coating method, drying the coating solution, and, if necessary, curing the coating solution by irradiating it with ionizing radiation.

[Transparent adhesive layer, first transparent adhesive layer, and second transparent adhesive layer]
Transparent adhesive layers such as the transparent adhesive layer 31, the first transparent adhesive layer 31a, and the second transparent adhesive layer 31b are layers for bonding the first-side antireflection layer 40, the second-side antireflection layer 50, the core layer 32, and the like to one another. Here, the term "transparent adhesive layer" in this specification encompasses a transparent adhesive layer. Transparent adhesive layers can be formed using various materials commonly used as adhesives. Examples include acrylic adhesives, urethane adhesives, olefin adhesives, rubber adhesives, silicone adhesives, and polyester adhesives. Acrylic adhesives, which have high transparency and can increase adhesive strength, are preferred.

Each of the above adhesives can contain various functionalizing agents, stabilizers, etc., as long as transparency is not impaired. Tackifiers can also be added to enhance adhesive strength. Furthermore, crosslinking agents such as isocyanates, epoxies, and double-bond-containing compounds can be used to form crosslinked structures depending on the resin.

The transparent adhesive layer can also be formed using an adhesive (OCA, Optical Clear Adhesive) laminated on both sides with a release film. Commercially available products can also be used as the transparent adhesive layer. Examples of commercially available products that can be used as the transparent adhesive layer include the LUCIACS series of optically clear adhesive sheets (manufactured by Nitto Denko Corporation), the 5400A series of highly transparent double-sided tapes (manufactured by Sekisui Chemical Co., Ltd.), the Opteria series of optically clear adhesive sheets (manufactured by Lintec Corporation), the SANCUARY series (manufactured by San-A Kaken Co., Ltd.), the OAD series of optically clear adhesives (manufactured by Toyo Hozai Co., Ltd.), the RA series of optical coreless double-sided tapes (manufactured by Sumiron Co., Ltd.), and the PD-S1 Panaclean series (manufactured by Panac Corporation). The adhesive strength of these adhesives is generally 10 N/25 mm or greater.

The thickness of the transparent adhesive layer is not particularly limited, but is preferably, for example, 2 μm or more and 200 μm or less. A transparent adhesive layer thickness of 2 μm or more ensures reliable bonding between the first-side anti-reflection layer 40 and the second-side anti-reflection layer 50, etc., and a transparent adhesive layer thickness of 200 μm or less maintains transparency (light transmittance). The lower limit of the transparent adhesive layer thickness is more preferably 5 μm or more, 10 μm or more, or 15 μm or more, and the upper limit is more preferably 150 μm or less, 160 μm or less, or 170 μm or less.

The method for forming the transparent adhesive layer is not particularly limited, and known methods used in the manufacture of adhesive tapes and the like can be used. Specifically, the transparent adhesive layer can be formed by coating the surface of a substrate with a coating of an adhesive composition prepared by dissolving or dispersing the components that form the transparent adhesive layer in an appropriate organic solvent or water, followed by drying and curing; by coating the components that form the transparent adhesive layer, double bond-containing monomers, oligomers, crosslinking agents, etc., onto a substrate without a solvent, followed by crosslinking using radiation or the like; or by extrusion lamination.

When using OCA, a transparent adhesive layer can be formed by peeling off the release film on the light release side of the OCA and laminating the adhesive surface to the substrate.

[Core layer]
The core layer 32 serves to support the first-side antireflection layer 40 and the second-side antireflection layer 50. As the material for the core layer 32, the same materials as those for the first-side transparent substrate layer 42 and the second-side transparent substrate layer 52 described above can be used.

There are no particular restrictions on the thickness of the core layer 32, and it can be selected appropriately depending on the application. The thickness of the core layer 32 may be approximately 5 μm or more and 130 μm or less, and considering durability, handling, etc., it is preferable that the thickness be 10 μm or more and 100 μm or less.

The thickness of the transparent laminate film 30 described above is preferably 300 μm or less. By making the thickness of the transparent laminate film 30 300 μm or less, the transparency of the transparent laminate film 30 can be improved. From the perspective of improving transparency and making conversations easier to hear, the thickness of the transparent laminate film 30 is more preferably 260 μm or less, and even more preferably 200 μm or less.

From the perspective of reducing the thickness of the transparent laminate film 30, a transparent laminate film 30 that does not include a core layer 32, as shown in Figures 2A and 2B, is preferable to a transparent laminate film 30 that includes a core layer 32, as shown in Figures 2C and 2D. A transparent laminate film 30 that does not include a core layer 32, as shown in Figures 2A and 2B, makes it particularly easy to reduce the thickness of the transparent laminate film 30 to 200 μm or less.

Note that if the upper limit on the thickness of the transparent laminate film 30 is limited as described above, the transparent laminate film 30 will bend more easily. On the other hand, from the perspective of preventing wrinkles (wavy shapes) from forming on the surface of the transparent laminate film 30 due to wind or the like, it is preferable that the transparent laminate film 30 be less likely to bend beyond a certain level. By preventing wrinkles (wavy shapes) from forming on the surface (first surface 301, second surface 302) of the transparent laminate film 30, it is possible to prevent users H1 and H2 from having difficulty recognizing each other due to wrinkles (wavy shapes).

The thickness of the transparent laminate film 30 may be, for example, 60 μm or more and 300 μm or less. When the thickness of the transparent laminate film 30 is 60 μm or more, the transparent laminate film 30 is less likely to bend, to the extent that the occurrence of wrinkles (wavy shapes) on the surface of the transparent laminate film 30 is suppressed. Furthermore, when the thickness of the transparent laminate film 30 is 60 μm or more, the movement of droplets such as saliva between users H1 and H2 facing each other across the partition 10 can be effectively suppressed. Furthermore, when the thickness of the transparent laminate film 30 is 300 μm or less, it becomes easier to hear what the other person is saying when conversing through the partition 10.

The height (vertical distance) of the transparent laminate film 30 may be, for example, 300 mm or more and 900 mm or less, and preferably 450 mm or more and 700 mm or less. The width (horizontal distance) of the transparent laminate film 30 may be, for example, 300 mm or more and 1800 mm or less, and preferably 450 mm or more and 1200 mm or less.

The above-mentioned transparent laminate film 30 has a bending stress of, for example, 6 N/20 mm or less.

By using the above-described transparent laminate film 30 in the partition 10, light reflection in the partition 10 is suppressed. For example, light reflection is suppressed more than in a partition that uses a typical acrylic partition panel. Furthermore, by using the above-described transparent laminate film 30 in the partition 10, the transparency of the partition 10 is improved. For example, the transparency of the partition 10 is improved more than in a partition that uses a typical acrylic partition panel.

It is preferable that the light reflectance of the transparent laminate film 30 described above is 3.0% or less. Here, the light reflectance of the transparent laminate film 30 refers to both the reflectance of light incident from the first surface 301 side of the transparent laminate film 30 and the reflectance of light incident from the second surface 302 side of the transparent laminate film 30. In other words, a light reflectance of 3.0% or less means that the reflectance of light incident from the first surface 301 side of the transparent laminate film 30 is 3.0% or less, and the reflectance of light incident from the second surface 302 side of the transparent laminate film 30 is 3.0% or less. This further improves the visibility of the transparent laminate film 30 when viewed from the first surface 301 side and when viewed from the second surface 302 side. It is more preferable that the light reflectance be 1.0% or less.

The total light transmittance (JIS K7361-1:1997) of the transparent laminate film 30 is preferably 90% or more. This further improves the visibility of the transparent laminate film 30 when viewed from the first surface 301 side, while also further improving the visibility of the transparent laminate film 30 when viewed from the second surface 302 side. The total light transmittance of the transparent laminate film 30 is more preferably 92% or more, and even more preferably 95% or more. The haze (JIS K7136:2000) of the transparent laminate film 30 is preferably 3.0% or less, more preferably 2.0% or less, and even more preferably 1.5% or less.

In the above-described transparent laminate film 30, the arithmetic mean roughness Ra (JIS B 0601:1994) of the first surface 301 and the second surface 302 is preferably 10 nm or less, and more preferably 1 nm or more and 8 nm or less. Furthermore, the ten-point mean roughness Rz (JIS B 0601:1994) of the first surface 301 and the second surface 302 is preferably 160 nm or less, and more preferably 50 nm or more and 155 nm or less. When Ra and Rz are within the above ranges, the first surface 301 and the second surface 302 have smoothness and improved scratch resistance.

The puncture strength of the transparent laminate film 30 described above is preferably 10.0 N or greater. A sufficiently high puncture strength ensures sufficient strength to prevent breakage of the transparent laminate film 30 when used in a partition 10. The method for measuring puncture strength is explained in Example 1 below.

As described above, such a partition 10 can be placed in a room R, such as a conference room or meeting space, and used to divide the space of the room R (see Figures 1A and 1B). This embodiment also provides a building B equipped with such a partition 10.

Manufacturing Method of Transparent Laminate Film and Partition Next, a manufacturing method of the transparent laminate film 30 and the partition 10 according to this embodiment will be described. First, a manufacturing method of the transparent laminate film 30 will be described.

First, the first-side anti-reflection layer 40 is prepared. In this process, for example, a resin film that will constitute the first-side transparent substrate layer 42 is first prepared. Next, a hard coat layer-forming coating liquid is applied to the resin film, followed by drying and ultraviolet irradiation, to form the first-side hard coat layer 44. Next, a high refractive index layer-forming coating liquid is applied to the first-side hard coat layer 44, followed by drying and ultraviolet irradiation, to form the first-side high refractive index layer 46. Next, a low refractive index layer-forming coating liquid is applied to the first-side high refractive index layer 46, followed by drying and ultraviolet irradiation, to form the first-side low refractive index layer 45. In this manner, the first-side anti-reflection layer 40 is obtained.

The second-side anti-reflection layer 50 is also prepared. For example, first, a resin film that will constitute the second-side transparent substrate layer 52 is prepared. Next, a hard coat layer-forming coating liquid is applied to the resin film, followed by drying and ultraviolet irradiation to form the second-side hard coat layer 54. Next, a high refractive index layer-forming coating liquid is applied to the second-side hard coat layer 54, followed by drying and ultraviolet irradiation to form the second-side high refractive index layer 56. Next, a low refractive index layer-forming coating liquid is applied to the second-side high refractive index layer 56, followed by drying and ultraviolet irradiation to form the second-side low refractive index layer 55. In this manner, the second-side anti-reflection layer 50 is obtained.

Then, the first-side anti-reflection layer 40 and the second-side anti-reflection layer 50 are adhered to each other via the transparent adhesive layer 31 to produce the transparent laminate film 30. In this manner, the transparent laminate film 30 can be produced.

Next, a first-side protective film 61 is attached to the first side 301 of the obtained transparent laminate film 30, and a second-side protective film 62 is attached to the second side 302. At this time, the first-side protective film 61 and the second-side protective film 62 may each include a bonding layer (not shown) and be attached to the transparent laminate film 30 via this bonding layer. In this manner, the transparent laminate film 60 with protective films can be produced. Note that the first-side protective film 61 and the second-side protective film 62 may also be attached separately to the first-side anti-reflection layer 40 and the second-side anti-reflection layer 50, respectively, before the first-side anti-reflection layer 40 and the second-side anti-reflection layer 50 are bonded to each other via the transparent adhesive layer 31.

Next, create partition 10.

First, the protective film-attached transparent laminate film 60 is processed into a predetermined shape. When producing the partition 10 shown in Figures 1A and 1B, the protective film-attached transparent laminate film 60 is cut into a rectangular shape having a pair of first sides 30a and a pair of second sides 30b.

Next, the first surface protective film 61 and the second surface protective film 62 are removed from the protective film-attached transparent laminate film 60 that has been processed into the specified shape. This results in the transparent laminate film 30 that has been processed into the specified shape.

Then, the transparent laminate film 30 is supported by the film support part 70. At this time, the transparent laminate film 30 is supported by the film support part 70 with the first surface 301 and the second surface 302 flattened. The stand part 90 is also connected to the film support part 70. In this way, the partition 10 is produced.

As described above, according to this embodiment, the partition 10 includes a transparent laminate film 30 having a first surface 301 and a second surface 302, and a film support portion 70 that supports the transparent laminate film 30. The transparent laminate film 30 includes a first-surface anti-reflection layer 40 that forms the first surface 301 and a second-surface anti-reflection layer 50 that forms the second surface 302. This reduces reflection of light incident from the first surface 301 side of the transparent laminate film 30 and reflection of light incident from the second surface 302 side of the transparent laminate film 30. This improves visibility of the transparent laminate film 30 when viewed from the first surface 301 side and the second surface 302 side. This allows users H1 and H2, who are facing each other across the partition 10, to easily see each other. This allows for smooth communication between users H1 and H2. It also helps prevent users H1 and H2 from feeling uncomfortable or fatigued due to light reflected on the first surface 301 or second surface 302 of the transparent laminate film 30.

Furthermore, because the partition 10 is equipped with the transparent laminate film 30, it is easier to hear what the other person is saying when conversing through the partition 10. This allows for smooth communication between users H1 and H2. The ability to achieve the above-mentioned effects will be explained in the examples below.

Furthermore, according to this embodiment, the transparent laminate film 30 further includes a core layer 32 located between the first-side anti-reflection layer 40 and the second-side anti-reflection layer 50. This improves the durability and handleability of the transparent laminate film 30.

Furthermore, according to this embodiment, the transparent laminate film 30 includes a first transparent adhesive layer 31a that bonds the first-side anti-reflection layer 40 and the core layer 32, and a second transparent adhesive layer 31b that bonds the core layer 32 and the second-side anti-reflection layer 50. This makes it easy to produce a transparent laminate film 30 that includes the core layer 32 located between the first-side anti-reflection layer 40 and the second-side anti-reflection layer 50.

Furthermore, according to this embodiment, the transparent laminate film 30 further includes a transparent adhesive layer 31 that bonds the first-side anti-reflection layer 40 and the second-side anti-reflection layer 50 to each other. This makes it easy to produce a transparent laminate film 30 that includes the first-side anti-reflection layer 40 and the second-side anti-reflection layer 50.

Furthermore, according to this embodiment, the film support portion 70 supports the transparent laminate film 30 in a flattened state. This prevents the transparent laminate film 30 from bending. As a result, light reflection on the transparent laminate film 30 can be effectively suppressed.

Furthermore, according to this embodiment, the partition 10 further includes a stand portion 90 that supports the film support portion 70 so that the first surface 301 of the transparent laminate film 30 is perpendicular to the horizontal plane G. This allows the film support portion 70 to be supported so that the first surface 301 of the transparent laminate film 30 is perpendicular to the horizontal plane G.

Modifications Next, modifications of the partition will be described.

(First Modification)
3 to 10 , the transparent laminate film 30 is loosely held by the film support portion 70. In this case, the transparent laminate film 30 is supported by the film support portion 70 in a state in which the transparent laminate film 30 is movable relative to the film support portion 70.

As shown in Figures 3 and 4, the film support section 70 has a first member 81 located on the first surface 301 side of the transparent laminate film 30, and a second member 82 located on the second surface 302 side of the transparent laminate film 30. In this modified example, the transparent laminate film 30 is supported by the film support section 70 by being inserted between the first member 81 and the second member 82.

The first member 81 and the second member 82 each have an overall rectangular frame shape. That is, the first member 81 includes an upper edge portion 81a, a lower edge portion 81b, and a pair of side edges 81c extending between the upper edge portion 81a and the lower edge portion 81b. Similarly, the second member 82 includes an upper edge portion 82a, a lower edge portion 82b, and a pair of side edges 82c extending between the upper edge portion 82a and the lower edge portion 82b.

In this modified example, a pair of first portions 71 and a pair of second portions 72 extending between the pair of first portions 71 are formed by a first member 81 and a second member 82. That is, the first portion 71 is formed by side edges 81c and 82c. The upper second portion 72 of the pair of second portions 72 is formed by upper edges 81a and 82a, and the lower second portion 72 of the pair of second portions 72 is formed by lower edges 81b and 82b. In this modified example, the lower second portion 72 of the pair of second portions 72 has a pair of legs 73 that protrude downward. Each leg 73 has a rectangular prism shape. This leg 73 is inserted into the opening 95a of the stand unit 90.

As shown in FIG. 5, a first step portion 83 is formed in the first member 81. The first step portion 83 is formed on the inner surface 81d side of the first member 81 (the side facing the first surface 301). The first step portion 83 is also formed around the entire circumference. This first step portion 83, together with a second step portion 84 of the second member 82 (described below), constitutes a first groove portion 75, a second groove portion 76, and an opening portion 77 (described below).

A sloped surface 83a is formed on the first step portion 83 at a position corresponding to the lower edge portion 81b of the first member 81. This sloped surface 83a slopes upward from the inner surface 81d (the side facing the first surface 301) to the outer surface.

Furthermore, a pair of first legs 85 protruding downward are formed on the lower side 81b. Each of these first legs 85 has a rectangular prism shape. These first legs 85, together with second legs 86 (described later) of the second member 82, constitute the aforementioned leg 73. Although not shown, the leg 73 may be constituted only by the first legs 85, without the second legs 86 (described later) being formed on the lower side 82b.

As shown in FIG. 6 , the second member 82 has a second step 84 formed thereon. The second step 84 is formed on the inner surface 82d side of the second member 82 (the side facing the second surface 302). The second step 84 is formed around the entire circumference. As described above, the second step 84, together with the first step 83 of the first member 81, constitutes the first groove 75, the second groove 76, and the opening 77, which will be described later.

Furthermore, a pair of second legs 86 protruding downward are formed on the lower side portion 82b. Each of these second legs 86 has a rectangular prism shape. As described above, the second legs 86, together with the first legs 85 of the first member 81, constitute the aforementioned leg 73. Although not shown, the leg 73 may be constituted only by the second legs 86, without the aforementioned first legs 85 being formed on the lower side portion 81b.

In this type of film support section 70, the first member 81 and the second member 82 are connected to each other with the inner surface 81d of the first member 81 facing the inner surface 82d of the second member 82. The manner in which the first member 81 and the second member 82 are connected to each other is not particularly limited. The first member 81 and the second member 82 may be connected to each other by, for example, screws, welding, adhesive, or adhesive tape.

As shown in Figures 7 and 8, in this modified example, a first groove 75 into which the first side (side edge) 30a of the transparent laminate film 30 is inserted is formed in the film support portion 70. This first groove 75 extends in the vertical direction. As described above, the first groove 75 is composed of the first step portion 83 of the first member 81 and the second step portion 84 of the second member 82.

Gaps S1a and S1b are formed between the transparent laminate film 30 and the first groove portion 75. Specifically, a gap S1a is formed between the transparent laminate film 30 and the first groove portion 75 in the thickness direction of the transparent laminate film 30 (the vertical direction in FIG. 7). A gap S1b is formed between the transparent laminate film 30 and the first groove portion 75 in the width direction of the transparent laminate film 30 (the horizontal direction in FIG. 7). In this manner, in this modified example, the transparent laminate film 30 is inserted into the first groove portion 75 with some play. This allows the transparent laminate film 30 to be supported by the film support portion 70 while being movable relative to the film support portion 70.

In the illustrated example, the gap S1a is formed on both sides (the first surface 301 side and the second surface 302 side) of the transparent laminate film 30 in the thickness direction (the vertical direction in FIG. 7). Note that the gap S1a may be formed only on the first surface 301 side or only on the second surface 302 side of the transparent laminate film 30.

In the illustrated example, the gap S1b is formed on both sides of the transparent laminate film 30 in the width direction (left-right direction in Figure 7). Note that the gap S1b may be formed on only one side of the transparent laminate film 30 in the width direction.

The width w1 of the first groove portion 75 along the thickness direction is preferably 0.5 mm or more and 3 mm or less. A width w1 of 0.5 mm or more allows for a larger gap S1a between the transparent laminate film 30 and the first groove portion 75. This prevents the transparent laminate film 30 from being fixed to the film support portion 70. Furthermore, a width w1 of 3 mm or less prevents deformation of the transparent laminate film 30, such as bending in the vertical direction. Furthermore, a width w1 of 3 mm or less also prevents deformation of the transparent laminate film 30, such as bending in the horizontal direction (left-right direction in Figure 7). In other words, deformation of the transparent laminate film 30, such as bending in the vertical and horizontal directions, can be prevented. This allows the first groove portion 75 to effectively support the transparent laminate film 30. Furthermore, the width of the gap S1b in the width direction of the transparent laminate film 30 may be 1 mm or more and 5 mm or less.

As shown in Figures 9 and 10, the film support portion 70 is formed with a second groove 76 into which the lower second edge 30b of the pair of second edges 30b of the transparent laminate film 30 is inserted. This second groove 76 extends horizontally. As described above, the second groove 76 is formed by the first step 83 of the first member 81 and the second step 84 of the second member 82.

Here, a gap S2 is formed between the transparent laminate film 30 and the second groove portion 76. Specifically, a gap S2 is formed between the transparent laminate film 30 and the second groove portion 76 in the thickness direction of the transparent laminate film 30 (the left-right direction in Figures 9 and 10). In this way, in this modified example, the transparent laminate film 30 is inserted into the second groove portion 76 with some play. As a result, the transparent laminate film 30 is supported by the film support portion 70 in a state in which it can move relative to the film support portion 70.

In the illustrated example, the gap S2 is formed on both sides (the first surface 301 side and the second surface 302 side) of the transparent laminate film 30 in the thickness direction. Note that the gap S2 may be formed only on the first surface 301 side or only on the second surface 302 side of the transparent laminate film 30.

The width w2 of the second groove portion 76 along the thickness direction is preferably 0.5 mm or more and 3 mm or less. A width w2 of 0.5 mm or more increases the gap S2 between the transparent laminate film 30 and the second groove portion 76. This prevents the transparent laminate film 30 from becoming fixed to the film support portion 70. Furthermore, a width w2 of 3 mm or less allows the second groove portion 76 to effectively support the transparent laminate film 30.

The second groove portion 76 includes a first side surface 76a facing the first surface 301 and a second side surface 76b facing the second surface 302. The height h1 of the first side surface 76a is different from the height h2 of the second side surface 76b. This makes it easier to insert the second edge 30b of the transparent laminate film 30 into the second groove portion 76. In the illustrated example, the height h1 of the first side surface 76a is lower than the height h2 of the second side surface 76b. The difference between the height h1 of the first side surface 76a and the height h2 of the second side surface 76b may be 5 mm or more and 15 mm or less. Having this difference of 5 mm or more makes it easier to insert the second edge 30b of the transparent laminate film 30 into the second groove portion 76. Having this difference of 15 mm or less prevents the film support portion 70 (second portion 72) from becoming too large. This prevents the film support portion 70 from becoming too conspicuous. This makes it easier for users H1 and H2, who are facing each other across the partition 10, to see each other.

The above-mentioned inclined surface 83a is formed on the upper part of the first side surface 76a. This allows the second side 30b of the transparent laminate film 30 to be easily guided into the second groove portion 76 when it comes into contact with the inclined surface 83a. Note that the height h1 of the first side surface 76a may be greater than the height h2 of the second side surface 76b, and an inclined surface may be formed on the upper part of the second side surface 76b.

As shown in Figures 3, 4, and 9, an opening 77 is formed between the upper edge portion 81a of the first member 81 and the upper edge portion 82a of the second member 82, allowing the transparent laminate film 30 to be inserted between the first member 81 and the second member 82. The width of this opening 77 (the distance along the thickness direction of the transparent laminate film 30) may be, for example, 0.5 mm or more and 3 mm or less, similar to the width w2 of the second groove portion 76.

Furthermore, holding members 78 that hold the upper edge portions 81a, 82a are attached to the upper edge portions 81a, 82a. These holding members 78 serve to adjust the width of the opening 77. That is, by attaching the holding members 78 to the upper edge portions 81a, 82a, the width of the opening 77 can be prevented from becoming too wide, and the width of the opening 77 can be maintained at the desired width (e.g., 0.5 mm or more and 3 mm or less). In the illustrated example, the holding members 78 sandwich the upper edge portions 81a, 82a from the thickness direction of the transparent laminate film 30. Furthermore, a single holding member 78 is attached to the upper edge portions 81a, 82a. Note that when a single holding member 78 is attached to the upper edge portions 81a, 82a, the transparent laminate film 30 may be sandwiched between the upper edge portions 81a, 82a, or the transparent laminate film 30 may be fixed to the upper edge portions 81a, 82a. That is, when only one holding member 78 is attached to the upper edge portions 81a, 82a, the transparent laminate film 30 can be prevented from wrinkling even when the transparent laminate film 30 expands and contracts as described below. For this reason, the transparent laminate film 30 may be fixed to the upper edge portions 81a, 82a. Although not shown, multiple holding members 78 may be attached to the upper edge portions 81a, 82a as long as the width of the opening 77 can be maintained at the desired width (e.g., 0.5 mm or more and 3 mm or less).

The retaining member 78 is preferably attached near the longitudinal center of the upper edge portions 81a, 82a. In other words, near the longitudinal center of the upper edge portions 81a, 82a, deformation of the upper edge portions 81a, 82a may cause the width of the opening 77 (the distance between the upper edge portions 81a, 82a) to widen. By attaching the retaining member 78 near the longitudinal center of the upper edge portions 81a, 82a, the width of the opening 77 can be maintained at a desired width (e.g., 0.5 mm to 3 mm) even in areas where the width of the opening 77 may widen. Such a retaining member 78 may be, for example, a clip.

The width Wa (see Figure 3) of such a film support portion 70 may be, for example, 310 mm or more and 1820 mm or less, and may be, for example, 887 mm. The depth Da (see Figure 3) of the film support portion 70 may be, for example, 2 mm or more and 50 mm or less, and may be, for example, 18 mm. The height Ha (see Figure 3) of the film support portion 70 may be, for example, 460 mm or more and 930 mm or less, and may be, for example, 604 mm.

Next, the stand unit 90 will be described. As shown in FIG. 3, the stand unit 90 includes a pair of bases 95, and a first support unit 96 and a second support unit 97 attached to each base 95. The bases 95 are plate-shaped members, and have an opening 95a formed in the center, into which the legs 73 are inserted. This opening 95a has a shape corresponding to the shape of the legs 73. In other words, the opening 95a has a rectangular shape in a plan view.

When viewed from the side (i.e., when viewed from the longitudinal direction of the second portion 72), the first support portion 96 has a rectangular shape with some of the corners cut off. In this case, the thickness of the first support portion 96 gradually decreases as it moves away from the first member 81.

Similarly, the second support portion 97 has a rectangular shape with some of the corners cut off when viewed from the side (i.e., when viewed from the longitudinal direction of the second portion 72). In this case, the thickness of the second support portion 97 gradually decreases as it moves away from the second member 82.

The first support portion 96 and the second support portion 97 are arranged on the base 95 so as to be spaced apart from each other. The second portion 72 of the film support portion 70 is inserted between the first support portion 96 and the second support portion 97, thereby supporting the film support portion 70 on the stand portion 90. The method for connecting the first support portion 96 and the second support portion 97 to the base 95 is not particularly limited. For example, the first support portion 96 and the second support portion 97 may be integrated with the base 95 by welding or the like.

Here, when the partition 10 is in use or stored, the transparent laminate film 30 may absorb moisture from the surrounding area. In this case, the absorbed moisture may cause the transparent laminate film 30 to expand or contract. If the transparent laminate film 30 expands or contracts in this way, wrinkles may occur in the transparent laminate film 30 in the partition 10. In contrast, in this modified example, the transparent laminate film 30 is supported by the film support section 70 in a state where it can move relative to the film support section 70. Therefore, when the transparent laminate film 30 expands or contracts, the transparent laminate film 30 moves relative to the film support section 70. In other words, the transparent laminate film 30 can expand or contract without causing wrinkles in the transparent laminate film 30. This improves the appearance of the partition 10.

As described above, according to this modification, the film support portion 70 is formed with a first groove portion 75 into which the first edge 30a of the transparent laminate film 30 is inserted. Gaps S1a and S1b are also formed between the transparent laminate film 30 and the first groove portion 75. The transparent laminate film 30 is supported by the film support portion 70 in a state in which it can move relative to the film support portion 70. This prevents wrinkles from forming in the transparent laminate film 30 even when the transparent laminate film 30 expands or contracts.

Furthermore, according to this modified example, a second groove 76 into which the second edge 30b of the transparent laminate film 30 is inserted is formed in the film support portion 70. A gap S2 is also formed between the transparent laminate film 30 and the second groove 76. This allows the film support portion 70 to support the transparent laminate film 30 in a more stable state. Furthermore, because the transparent laminate film 30 is inserted into the second groove 76 while being movable relative to the film support portion 70, the occurrence of wrinkles in the transparent laminate film 30 can be suppressed even if the transparent laminate film 30 expands or contracts.

Furthermore, in this modified example, the second groove portion 76 includes a first side surface 76a facing the first surface 301 and a second side surface 76b facing the second surface 302. Furthermore, the height h1 of the first side surface 76a is different from the height of the second side surface 76b. This makes it easier to insert the second edge 30b of the transparent laminate film 30 into the second groove portion 76.

In the above-described modified example, an example was described in which a pair of first portions 71 and a pair of second portions 72 extending between the pair of first portions 71 were configured from a first member 81 and a second member 82, but this is not limited to this. For example, although not shown, each first portion 71 may be configured from a single member. Similarly, each second portion 72 may be configured from a single member. Furthermore, the first portion 71 and the second portion 72 may be configured from separate members.

In the above-described modified example, the first groove portion 75 and the second groove portion 76 are respectively formed by the first step portion 83 of the first member 81 and the second step portion 84 of the second member 82. However, this is not limited to this. For example, although not shown, one of the first step portion 83 and the second step portion 84 may not be formed. Even in this case, the first groove portion 75 and the second groove portion 76 can be formed by the first member 81 and the second member 82 by forming the other of the first step portion 83 and the second step portion 84. In this case, a step portion (e.g., the second step portion 84) does not need to be formed in one of the members (e.g., the second member 82). This simplifies the manufacturing process of that member. Furthermore, although not shown, the first groove portion 75 and the second groove portion 76 may be formed by interposing another member between the first member 81 and the second member 82.

(Second Modification)
11 to 17 , a groove 79 into which the second side (lower edge) 30 b of the transparent laminate film 30 is inserted is formed in the film support part 70, and the groove 79 is curved in a plan view. Also in this modification, the transparent laminate film 30 is loosely held by the film support part 70, and the transparent laminate film 30 is supported by the film support part 70 in a state in which the transparent laminate film 30 is movable relative to the film support part 70.

As shown in Figures 11 and 12, the film support section 70 is made up of a rod-shaped member, and the film support section 70 is curved in a planar view. In the illustrated example, the film support section 70 is curved in an S-shape in a planar view. In this modified example, the film support section 70 is made up of a single member.

As shown in Figures 11 to 17, a groove 79 is formed in the film support portion 70, into which the lower second edge 30b (lower edge) of the pair of second edges 30b of the transparent laminate film 30 is inserted. This groove 79 extends horizontally. Furthermore, the groove 79 is curved in a plan view. In the illustrated example, the groove 79 is curved in an S-shape in a plan view.

Furthermore, as shown in Figures 13 to 17, a gap S3 is formed between the transparent laminate film 30 and the groove portion 79. Specifically, a gap S3 is formed between the transparent laminate film 30 and the groove portion 79 in the thickness direction of the transparent laminate film 30. In this manner, in this modified example, the transparent laminate film 30 is inserted into the groove portion 79 with some play. This allows the transparent laminate film 30 to be supported by the film support portion 70 in a state in which it can move relative to the film support portion 70. Note that in this case, the first edge 30a of the transparent laminate film 30 may be entirely exposed to the outside.

In the illustrated example, the gap S3 is formed only on the first surface 301 side of the transparent laminate film 30 in some areas. Also, the gap S3 is formed only on the second surface 302 side in some areas. Furthermore, the gap S3 is formed on both sides (the first surface 301 side and the second surface 302 side) of the transparent laminate film 30 in the thickness direction in some areas.

In this modified example, as described below, the transparent laminate film 30 is curved in a planar view. That is, in this modified example, the transparent laminate film 30 is inserted into the groove 79 in a state in which it is elastically deformed so as to be curved in an S-shape in a planar view. In this case, the transparent laminate film 30 deforms within the groove 79 so as to extend linearly in a planar view. In this case, as shown in FIGS. 13 and 14, the deformation of the transparent laminate film 30 within the groove 79 can cause the transparent laminate film 30 to tilt in the thickness direction relative to the up-down direction. Therefore, the position at which the gap S3 is formed in the thickness direction of the transparent laminate film 30 can change along the up-down direction. Note that FIG. 13 is a perspective view showing the vicinity of the right-side first edge 30a of the transparent laminate film 30 shown in FIG. 12. FIG. 14 is a perspective view showing the vicinity of the left-side first edge 30a of the first edges 30a of the transparent laminate film 30 shown in FIG. 12.

Specifically, as shown in FIG. 15 , near the bottom surface of the groove portion 79, the gap S3 is formed only on the first surface 301 side of the transparent laminate film 30 near the first peak point P1. Near the bottom surface of the groove portion 79, the gap S3 is formed only on the second surface 302 side of the transparent laminate film 30 near the second peak point P2. Near the bottom surface of the groove portion 79, the gap S3 is formed on both sides in the thickness direction of the transparent laminate film 30 in areas other than near the first peak point P1 or the second peak point P2. That is, as described above, in this modification, the transparent laminate film 30 deforms within the groove portion 79 so as to extend linearly in a planar view. As a result, the second surface 302 of the transparent laminate film 30 contacts the side surface 79a of the groove portion 79 near the first peak point P1, and the first surface 301 contacts the side surface 79b of the groove portion 79 near the second peak point P2. Here, the first peak point P1 is the point at which the side surface 79a of the groove portion 79 on the second surface 302 side protrudes more toward the first surface 301 than the surrounding area. The second peak point P2 is the point at which the side surface 79b of the groove portion 79 on the first surface 301 side protrudes more toward the second surface 302 than the surrounding area. In other words, the first peak point P1 is the point at which the amount of protrusion toward the first surface 301 side is maximized, and the second peak point P2 is the point at which the amount of protrusion toward the second surface 302 side is maximized.

On the other hand, because the transparent laminate film 30 can be tilted in the thickness direction relative to the up-down direction, as shown in FIG. 16 , near the upper end of the groove portion 79, in the vicinity of the first peak point P1, the gap S3 is formed only on the second surface 302 side of the transparent laminate film 30. Also, near the upper end of the groove portion 79, in the vicinity of the second peak point P2, the gap S3 is formed only on the first surface 301 side of the transparent laminate film 30. Near the upper end of the groove portion 79, in areas other than near the first peak point P1 or the second peak point P2, the gap S3 is formed on both sides in the thickness direction of the transparent laminate film 30.

As shown in Figure 17, the width w3 of the groove 79 along the thickness direction is preferably 0.5 mm or more and 3 mm or less. By making the width w3 0.5 mm or more, the gap S3 between the transparent laminate film 30 and the groove 79 can be made larger. This prevents the transparent laminate film 30 from becoming fixed to the film support portion 70. Furthermore, by making the width w3 3 mm or less, the transparent laminate film 30 can be effectively supported by the groove 79.

The depth D of the groove portion 79 is preferably 10 mm or more and 70 mm or less. A depth D of 10 mm or more allows the groove portion 79 to effectively support the transparent laminate film 30. Furthermore, a depth D of 70 mm or less prevents the film support portion 70 from becoming too large. This prevents the film support portion 70 from being too conspicuous. This makes it easier for users H1 and H2, who are facing each other across the partition 10, to see each other.

Furthermore, it is preferable that the depth D of the groove portion 79 is 2% or more and 8% or less of the height h3 of the transparent laminate film 30. By making the depth D 2% or more of the height h3, the transparent laminate film 30 can be effectively supported by the groove portion 79. Furthermore, by making the depth D 8% or less of the height h3, the film support portion 70 can be prevented from becoming too large and being too conspicuous. This makes it easier for users H1 and H2 facing each other across the partition 10 to see each other.

The width Wb (see Figure 12) of such a film support portion 70 may be, for example, 280 mm or more and 1750 mm or less, and may be, for example, 825 mm. The depth Db (see Figure 15) of the film support portion 70 may be, for example, 30 mm or more and 300 mm or less, and may be, for example, 168.7 mm. The height Hb (see Figures 12 and 17) of the film support portion 70 may be, for example, 451 mm or more and 930 mm or less, and may be, for example, 30 mm.

In this modification, the film support portion 70 supports the transparent laminate film 30 only by the groove portion 79. In this case, the first side (side edge) 30a and the upper second side (top edge) 30b of the transparent laminate film 30 are exposed. That is, the film support portion 70 does not include a member covering the first side (side edge) 30a or the second side (top edge) 30b of the transparent laminate film 30. Therefore, in this modification, the area visible to users H1 and H2 through the partition 10 can be expanded. Furthermore, the ratio of the area of the film support portion 70 to the area of the partition 10 can be reduced in a front view. This reduces obstruction to users H1 and H2's field of vision. This makes it easier for users H1 and H2, who are facing each other across the partition 10, to see each other, facilitating smoother communication between users H1 and H2.

The transparent laminate film 30 is curved in a planar view. In the illustrated example, the transparent laminate film 30 is curved in an S-shape in a planar view. This prevents the transparent laminate film 30 from bending in the vertical direction, even when the transparent laminate film 30 is supported only by the groove portion 79. This allows the transparent laminate film 30 to stand on its own.

As described above, the transparent laminate film 30 can suppress reflection of light incident from the first surface 301 side of the transparent laminate film 30 and reflection of light incident from the second surface 302 side of the transparent laminate film 30. Therefore, even if the transparent laminate film 30 is curved in a planar view, users H1, H2, etc. can be suppressed from being reflected in the transparent laminate film 30.

In addition, in this modified example, the first side (side edge) 30a and the second side 30b of the transparent laminate film 30, of which the upper side (upper edge) 30b is located, are exposed to the outside. In this case, it is preferable that the corner between the second side 30b and the first side 30a is rounded. This can prevent users H1 and H2 from being injured even if they come into contact with the partition 10.

As described above, according to this modification, a groove 79 is formed in the film support portion 70, into which the lower second edge 30b of the transparent laminate film 30 is inserted. The groove 79 is also curved in a plan view. A gap S3 is formed between the transparent laminate film 30 and the groove 79. The transparent laminate film 30 is supported by the film support portion 70 in a state in which it can move relative to the film support portion 70. Even in this case, even if the transparent laminate film 30 expands or contracts, the occurrence of wrinkles in the transparent laminate film 30 can be suppressed. This improves the appearance of the partition 10.

In addition, according to this modified example, the corner between the upper second edge 30b of the transparent laminate film 30 and the first edge 30a is rounded. This reduces the risk of injury to users H1 and H2 even if they come into contact with the partition 10.

In the above-described modified example, an example in which the film support section 70 is composed of a single member has been described, but this is not limited to this. For example, although not shown, the film support section 70 may be composed of multiple members.

Furthermore, in the above-described modified example, an example was described in which the film support portion 70 is curved in a planar view, but this is not limited to this. For example, although not shown, the film support portion 70 may extend linearly in a planar view as long as the groove portion 79 is curved in a planar view.

Next, we will describe specific examples of the above embodiment.

Example 1
First, the transparent laminate film 30 shown in FIG. 2C was prepared. First, a first-side antireflection layer 40 was prepared. To prepare the first-side antireflection layer 40, a 60 μm-thick triacetyl cellulose film (refractive index: 1.49) was first prepared as the first-side transparent substrate layer 42. Next, a hard coat layer-forming coating solution having the following formulation was applied to the triacetyl cellulose film, followed by drying and ultraviolet irradiation, to form a first-side hard coat layer 44 having a thickness of 7.3 μm, a refractive index of 1.54, and a pencil hardness of 2H. Next, a high refractive index layer-forming coating solution having the following formulation was applied to the first-side hard coat layer 44, followed by drying and ultraviolet irradiation, to form a first-side high refractive index layer 46 having a thickness of 150 nm and a refractive index of 1.63. Next, a coating liquid for forming a low refractive index layer having the following formulation was applied onto this first-side high refractive index layer 46, followed by drying and ultraviolet irradiation to form a first-side low refractive index layer 45 having a thickness of 100 nm and a refractive index of 1.30, thereby obtaining a first-side anti-reflection layer 40.

<Preparation of Coating Solution for Forming Hard Coat Layer>
1.6 parts by mass of a photopolymerization initiator (BASF, Irgacure 127, 2-hydroxy-1-{4-[4-(2-hydroxy-2-methylpropionyl)benzyl]phenyl}-2-methylpropan-1-one) and 58.3 parts by mass of a dilution solvent (methyl isobutyl ketone/cyclohexanone = 8/2) were added and stirred until no residue remained. 20 parts by mass of a photocurable resin (Arakawa Chemical, Beamset 577) and 20 parts by mass of a high refractive index resin (DIC Corporation, Polylite RX-4800) were added and stirred until no residue remained. Finally, 0.1 parts by mass of a leveling agent (Dainichiseika Color & Chemicals Mfg. Co., Ltd., Seikabeam 10-28 (MB)) was added and stirred to prepare a coating solution for forming a hard coat layer.

<Preparation of Coating Solution for Forming High Refractive Index Layer>
0.1 parts by weight of a photopolymerization initiator (manufactured by BASF, Irgacure 127) and 92.6 parts by weight of a dilution solvent (methyl isobutyl ketone/cyclohexanone/methyl ethyl ketone = 4/2/4) were added and stirred until no residue remained. 1.25 parts by weight of a photocurable resin (manufactured by Arakawa Chemical Co., Ltd., Beamset 577) were added and stirred until no residue remained. 6 parts by weight of zirconium oxide (manufactured by Sumitomo Osaka Cement Co., Ltd., MZ-230X, solids content 32.5% by weight, average primary particle size 15 to 50 nm) and 0.05 parts by weight of a leveling agent (manufactured by Dainichiseika Color & Chemicals Mfg. Co., Ltd., Seikabeam 10-28 (MB)) were added and stirred to prepare a coating solution for forming a high refractive index layer.

<Preparation of Coating Solution for Forming Low Refractive Index Layer>
0.2 parts by weight of a photopolymerization initiator (manufactured by BASF, Irgacure 127) and 91.1 parts by weight of a dilution solvent (MIBK/AN = 7/3) were added and stirred until no residue remained. 1.0 parts by weight of a photocurable resin (manufactured by Nippon Kayaku Co., Ltd., KAYARAD-PET-30), 7.6 parts by weight of hollow silica particles (solid content 20% by weight, average primary particle diameter 60 nm), and 0.1 parts by weight of a leveling agent (manufactured by Dainichiseika Color & Chemicals Mfg. Co., Ltd., Seikabeam 10-28 (MB)) were added and stirred to prepare a coating solution for forming a low refractive index layer.

Next, a second-side anti-reflection layer 50 was prepared. To prepare the second-side anti-reflection layer 50, a 60 μm-thick triacetyl cellulose film (refractive index: 1.49) was first prepared as the second-side transparent substrate layer 52. The hard coat layer-forming coating solution described above was then applied to the triacetyl cellulose film, dried, and irradiated with UV light to form a second-side hard coat layer 54 with a thickness of 7.3 μm, a refractive index of 1.54, and a pencil hardness of 2H. The high refractive index layer-forming coating solution described above was then applied to the second-side hard coat layer 54, dried, and irradiated with UV light to form a second-side high refractive index layer 56 with a thickness of 150 nm and a refractive index of 1.63. The low refractive index layer-forming coating solution described above was then applied to the second-side high refractive index layer 56, dried, and irradiated with UV light to form a second-side low refractive index layer 55 with a thickness of 100 nm and a refractive index of 1.30, thereby obtaining the second-side anti-reflection layer 50.

Next, the first-side antireflection layer 40 and the second-side antireflection layer 50 were bonded together via a transparent adhesive layer (Panaclean series PD-S1, manufactured by Panac Corporation, thickness 25 μm), a 60 μm-thick triacetyl cellulose film, and another transparent adhesive layer (Panaclean series PD-S1, thickness 25 μm, manufactured by Panac Corporation) to produce a transparent laminate film 30. The layer structure of the obtained transparent laminate film 30 is as follows.
Low flex/High flex/Hard coat/TAC/Adhesive/TAC/Adhesive/TAC/Hard coat/High flex/Low flex In the above, "low flex" means the first surface low refractive index layer or the second surface low refractive index layer (same below). Also, "high flex" means the first surface high refractive index layer or the second surface high refractive index layer (same below). Also, "hard coat" means the first surface hard coat layer or the second surface hard coat layer (same below). Also, "TAC" means triacetyl cellulose film (same below). Furthermore, "adhesive" means a transparent adhesive layer. The thickness of the transparent laminate film 30 according to Example 1 was 245.1 μm.

(1) Reflectance Measurement Test Next, a reflectance measurement test was carried out on the transparent laminate film 30.

First, a 20 mm x 20 mm sample was cut out from the obtained transparent laminate film 30. Next, a black resin plate was attached to the backside of the sample. Next, light was irradiated onto the surface of the sample at an incident angle of 5°. The wavelength of the light was 550 nm. The light reflection spectrum was measured using a spectrophotometer (V-7100, manufactured by JASCO Corporation) and the light reflectance was calculated.

(2) Transmittance Measurement Test The transparent laminate film 30 was subjected to a transmittance measurement test.

First, a 20 mm x 20 mm sample was cut out from the obtained transparent laminate film 30. Next, light was irradiated onto the surface of the sample at an incident angle of 90°. The light had a wavelength of 550 nm and was irradiated onto the surface of the sample. The light transmission spectrum was then measured using a spectrophotometer (V-7100, manufactured by JASCO Corporation), and the light transmittance at each wavelength was calculated.

(3) Haze Measurement Test The transparent laminate film 30 was also subjected to a haze measurement test.

First, a 20 mm x 20 mm sample was cut out from the obtained transparent laminate film 30. Next, the haze was measured using a haze meter (HM-150, manufactured by Murakami Color Research Laboratory Co., Ltd.) using the following method. First, visible light was irradiated onto the transparent laminate film 30 from the first surface 301 side along the thickness direction of the transparent laminate film 30. Next, the ratio of diffuse transmitted light to total transmitted light was measured. The haze (cloudiness) was then expressed as diffuse transmitted light / total transmitted light x 100 (%).

(4) Puncture Resistance Test, Simple Puncture Test The transparent laminate film 30 was subjected to a puncture resistance test.

The puncture strength of the transparent laminate film 30 was measured in accordance with JIS Z1707 7.4. The measuring device used was a combination of a Force Tester MCT-2150 manufactured by A&D Co., Ltd. and a puncture test fixture JM-CL-100N manufactured by A&D Co., Ltd. Specifically, as shown in Figure 18, a needle 100 was pierced from the first surface 301 side of a fixed test piece of the transparent laminate film 30, and the maximum stress until the needle 100 penetrated the transparent laminate film 30 was measured. The needle 100 had a diameter of 1.0 mm and a hemispherical tip with a radius of 0.5 mm. The needle 100 was pierced into the transparent laminate film 30 at a speed of 50 mm/min (50 mm per minute). The maximum stress was measured for five test pieces, and the average value was used as the puncture strength of the transparent laminate film 30. The measurement was performed in an environment with a temperature of 23°C and a relative humidity of 50%.

Furthermore, a simple puncture test was conducted. First, the transparent laminate film 30 was fixed to the base of the puncture test jig JM-CL-100N described above. Next, a mechanical pencil (Mechpencil 0.7 manufactured by Daiso Industries Co., Ltd.) was prepared. The tester then manually punctured the transparent laminate film 30 10 times with the tip of the mechanical pencil. The simple puncture test was conducted without the lead protruding from the tip of the mechanical pencil. In this way, the puncture resistance of the transparent laminate film 30 was evaluated.

(5) Acoustic Characteristics Evaluation Test An acoustic characteristics evaluation test was also carried out on the partition 10. FIG. 19 is a diagram for explaining the acoustic characteristics evaluation test on the partition 10.

In the acoustic characteristics evaluation test, loudness (sone) was measured based on ISO 532-1. Specifically, a partition 10 was placed on a desk T in the room, as shown in Figure 19. A speaker 101 (OfficeCore M2, manufactured by eMeet) was placed on the first surface 301 of the transparent laminate film 30 of the partition 10. The distance d1 between the first surface 301 and the speaker 101 was set to 50 cm. A loudness measurement system 102 was placed on the second surface 302 of the transparent laminate film 30. The loudness measurement system 102 was a device combining an analyzer (Multijob FFT Analyzer OR34, manufactured by OROS Corporation) and a microphone (Microphone 378B02, manufactured by PCB Corporation). The distance d2 between the second surface 302 and the loudness measurement system 102 was set to 50 cm. White noise was then played from speaker 101, and sound pressure was measured using loudness measurement system 102. The measured sound pressure was then multiplied by a coefficient to calculate loudness (sone). Loudness (sone) was calculated by measuring sound pressure at multiple frequencies between 12.5 Hz and 12,800 Hz, and then using the sound pressure measurement results to calculate with the analyzer system. Here, 1 sone is the loudness of sound perceived by a human hearing a pure tone of 1 kHz and 40 dB.

(6) Sensory Evaluation Test A sensory evaluation test of the partition 10 was also carried out.

The purpose of the sensory evaluation test will be explained. The inventors of the present invention have conducted extensive research into a partition 10 that would enable smooth communication between users H1 and H2. As a result, the inventors have discovered that in order to achieve smooth communication between users H1 and H2, it is important that speech can be easily heard through the partition 10. The inventors have also discovered that in order to achieve smooth communication between users H1 and H2, it is important that users H1 and H2 can clearly see each other's facial expressions, mouth movements, etc. through the partition 10. Based on this knowledge, a sensory evaluation test was conducted to evaluate the usability of the partition 10 when actually used.

For the sensory evaluation test, the 18 test subjects were divided into nine pairs of two people. Next, each of the nine pairs of test subjects was interviewed about whether it was easy or difficult for them to see each other when they were facing each other across the partition 10, as shown by users H1 and H2 in Figure 1A.

At this time, each subject was asked to provide a score representing the degree of visibility. Specifically, the scores representing the degree of visibility were set as follows: First, the state in which the partition 10 was not used (Comparative Example 4, described below) was assigned a score of 3. Next, the state in which a commercially available partition was used (Comparative Example 2, described below) was assigned a score of 0. The commercially available partition had a 2 mm thick acrylic plate as a dividing panel.

Each subject was then asked to rate the degree of visibility they felt when using the partition 10 of Example 1.

In addition, each of the nine pairs of subjects was asked whether it was easy or difficult for them to hear each other's voices when they conversed through partition 10. During this conversation, each subject conversed through partition 10 both in a state where their field of vision was obstructed by wearing an eye mask, and in a state where their field of vision was not obstructed.

At this time, each subject was asked to provide a score representing the degree of ease of hearing. Specifically, the scores representing the degree of ease of hearing were set as follows: First, the subjects conversed with each other without using the partition 10 (Comparative Example 4, described below), and the score in this case was set to 3 points. Then, the subjects conversed with each other through a commercially available partition (Comparative Example 2, described below), and the score in this case was set to 0 points. The commercially available partition had a 2 mm thick acrylic plate as a dividing panel.

Each subject was then asked how easy it was to hear when using the partition 10 of Example 1. The degree of ease of hearing was calculated as a score based on a comprehensive evaluation of both the state in which each subject's field of vision was obstructed and the state in which their field of vision was not obstructed. The subjects were also asked if they had noticed anything else when using the partition 10.

Example 2
A reflectance measurement test, a transmittance measurement test, a haze measurement test, a puncture resistance test, a simple puncture test, an acoustic property evaluation test, and a sensory evaluation test were performed in the same manner as in Example 1, except that the transparent laminate film 30 shown in FIG. 2E was prepared, a transparent polyethylene terephthalate (PET) film having a thickness of 60 μm was used as the layers corresponding to the first-side transparent substrate layer 42 and the second-side transparent substrate layer 52, and the thickness of the transparent laminate film 30 was 160 μm.

(Comparative Example 1)
A reflectance measurement test, a transmittance measurement test, a haze measurement test, a puncture resistance test, a simple puncture test, an acoustic property evaluation test, and a sensory evaluation test were performed in the same manner as in Example 1, except that a commercially available polyethylene terephthalate (PET) film having a thickness of 25 μm (Lumirror T60, manufactured by Toray Industries, Inc.) was used instead of the transparent laminate film 30.

(Comparative Example 2)
The reflectance measurement test, transmittance measurement test, haze measurement test, puncture resistance test, and simple puncture test were conducted in the same manner as in Example 1, except that a 2 mm thick acrylic plate used in a commercially available partition (Artec Co., Ltd., extra large splash prevention panel partition set 51450) was used instead of the transparent laminate film 30.

In addition, acoustic property evaluation tests and sensory evaluation tests were conducted in the same manner as in Example 1, except that the commercially available partition described above was used instead of the partition 10 using the transparent laminate film 30.

(Comparative Example 3)
A reflectance measurement test, a transmittance measurement test, a haze measurement test, a puncture resistance test, and a simple puncture test were performed in the same manner as in Example 1, except that a commercially available polyethylene terephthalate (PET) film having a thickness of 16 μm (Lumirror 16F68M, manufactured by Toray Industries, Inc.) was used instead of the transparent laminate film 30.

(Comparative Example 4)
Except for the fact that no partition was used, the acoustic characteristic evaluation test and the sensory evaluation test were carried out in the same manner as in Example 1. Specifically, in the acoustic characteristic evaluation test, loudness (sone) was measured with the speaker 101 and the loudness measurement system 102 separated by 100 cm.

(Test results)
Of the above tests, the results of the reflectance measurement test, transmittance measurement test, haze measurement test, puncture resistance test, simple puncture test and acoustic property evaluation test are shown in Table 1.

In the simple puncture test column in Table 1 above, "◯" means that the simple puncture test showed high resistance to puncture. In other words, this means that the tip of the mechanical pencil did not penetrate the transparent laminate film 30. "X" means that the simple puncture test showed low resistance to puncture. In other words, this means that the tip of the mechanical pencil penetrated the transparent laminate film 30, creating a hole in the transparent laminate film 30.

As a result, as shown in Table 1, in the reflectance measurement test, the reflectance of light with a wavelength of 550 nm in Comparative Examples 1, 2, and 3 was a high reflectance of 6.0% or more. In contrast, the reflectance of light with a wavelength of 550 nm in Examples 1 and 2 was 0.1% and 0.8%, respectively. Thus, the transparent laminate films 30 of Examples 1 and 2 were able to reduce the reflectance of light with a wavelength of 550 nm.

Furthermore, as shown in Table 1, in the transmittance measurement test, the transmittance of light with a wavelength of 550 nm in Comparative Examples 1, 2, and 3 was 87.4%, 91.4%, and 85.0%, respectively. In contrast, the transmittance of light with a wavelength of 550 nm in Examples 1 and 2 was 98.7% and 98.1%, respectively. Thus, the transparent laminate films 30 of Examples 1 and 2 were able to improve the transmittance of light with a wavelength of 550 nm.

Furthermore, as shown in Table 1, in the haze measurement test, the haze was 1.4% and 3.5% in Comparative Example 1 and Comparative Example 3, respectively. In contrast, the haze was 0.7% and 0.6% in Example 1 and Example 2, respectively. Thus, the transparent laminate films 30 of Examples 1 and 2 had reduced haze compared to the films of Comparative Example 1 and Comparative Example 3.

Furthermore, as shown in Table 1, in the puncture resistance test, the maximum stress value for Comparative Example 1 and Comparative Example 3 was 8 N or less, making them prone to puncture and breakage. In contrast, the maximum stress value for Examples 1 and 2 was 10 N or more, making them less prone to puncture. Furthermore, in the simple puncture test, Comparative Examples 1 and 3 had low puncture resistance. In contrast, Examples 1 and 2 had high puncture resistance. Therefore, the films of Examples 1 and 2 had greater puncture resistance than the films of Comparative Example 1 or Comparative Example 3.

Furthermore, as shown in Table 1, in the acoustic characteristics evaluation test, the measured loudness (sone) in Comparative Example 2 was 8.7 sones. In contrast, the measured loudness in Examples 1 and 2 was 9.0 sones. As such, it was shown that the partitions 10 in Examples 1 and 2 transmit sound from the speaker 101 to the loudness measurement system 102 more easily than the partition in Comparative Example 2. These results demonstrate that the partitions 10 in Examples 1 and 2 transmit sound better than the partition in Comparative Example 2.

The results of the sensory evaluation test are shown in Table 2.

The values shown in the "Ease of visibility" and "Ease of hearing" columns in Table 2 above are the average scores obtained from interviews with each subject.

As a result, as shown in Table 2, in the sensory evaluation test for "ease of visibility," when the partition of Comparative Example 2 was given a score of 0, the average visibility scores of Examples 1 and 2 were greater than 0. Also, as shown in Table 2, the average visibility score of Comparative Example 1 was 0.3 points. In contrast, the average visibility scores of Examples 1 and 2 were 2.6 points and 1.9 points, respectively. Thus, it was found that users can more easily see each other with the partitions 10 of Examples 1 and 2 than with the partitions of Comparative Examples 1 and 2.

In addition, through interviews with the subjects, it was learned that with the partition of Comparative Example 1, wrinkles (wavy shapes) occurred on the surface of the PET film, making it difficult to see the figures of the paired subjects. Furthermore, it was learned that with the partition 10 of Example 1, the wrinkles (wavy shapes) on the surface of the transparent laminate film 30 were smaller than with the partition of Comparative Example 1, making it easier to see the figures of the paired subjects. From this, it was found that the transparent laminate film 30 of Example 1 can reduce the wrinkles (wavy shapes) that occur on the surface compared to the PET film of Comparative Example 1, and when used in the partition 10, it is easier for users to see each other.

Furthermore, as shown in Table 2, in a sensory evaluation test regarding "ease of hearing," when the partition according to Comparative Example 2 was given a score of 0, the average audibility scores for Examples 1 and 2 were greater than 0. Also, as shown in Table 2, the average audibility score for Comparative Example 1 was 0.7 points. In contrast, the average audibility scores for Examples 1 and 2 were 1.6 points and 2.0 points, respectively. Thus, it was found that users could hear each other's voices more easily with the partitions 10 according to Examples 1 and 2 than with the partitions according to Comparative Examples 1 and 2.

As mentioned above, in the acoustic characteristics evaluation test, the measured loudness (sone) for Examples 1 and 2 was 9.0 sones (see Table 1). On the other hand, the measured loudness for Comparative Example 1 was 9.4 sones. This indicates that the partition for Comparative Example 1 transmits sound more easily than the partition 10 for Examples 1 and 2. On the other hand, as shown in Table 2, the average score for "ease of hearing" in the sensory evaluation test was higher for the partition 10 for Examples 1 and 2 than for the partition for Comparative Example 1. This indicates that when using the partition 10 for Examples 1 and 2, users found it easier to hear each other's voices than when using the partition for Comparative Example 1. While a full understanding of the reasons for this remains to be seen, it is believed that in the sensory evaluation test, factors such as whether users can easily see each other's mouth movements affect the ease with which they can hear each other's voices. Specifically, with the partitions 10 of Examples 1 and 2, it is easier to see each other's mouth movements than with the partition of Comparative Example 1, which is thought to give users the impression that it is easier to hear each other's voices.

From the above, it was found that when users converse face-to-face with a partition between them, conditions such as whether they can easily see each other's mouth movements can affect whether they find it easy to hear each other's voices. Furthermore, in a sensory evaluation test in which subjects actually conversed through a partition, it was found that users rated it as easier to hear each other's voices when partitions 10 according to Examples 1 and 2 were used than when the partition according to Comparative Example 1 was used.

The multiple components disclosed in the above embodiments and modifications may be combined as needed. Alternatively, some components may be omitted from all of the components shown in the above embodiments and modifications.

10 Partition 30 Transparent laminated film 30a First side 30b Second side 301 First surface 302 Second surface 40 First-side anti-reflection layer 50 Second-side anti-reflection layer 61 First-side protective film 62 Second-side protective film 70 Film support portion 71 First portion 72 Second portion 75 First groove portion 76 Second groove portion 76a First side surface 76b Second side surface 79 Groove portion 90 Stand portion G Horizontal surface

Claims (18)

a transparent laminate film having a first surface and a second surface located opposite the first surface;
A film support portion that supports the transparent laminate film,
the transparent laminate film includes a first-side antireflection layer that constitutes the first surface and a second-side antireflection layer that constitutes the second surface,
the transparent laminate film has an upper edge, a lower edge, and a pair of side edges extending between the upper edge and the lower edge;
a pair of first grooves into which the side edges of the transparent laminate film are inserted, respectively, are formed in the film support portion;
a gap is formed between the transparent laminate film and the first groove portion in the thickness direction and the width direction of the transparent laminate film,
The transparent laminate film is supported on the film support portion in a state where it can move relative to the film support portion . The partition according to claim 1 , wherein the width of the first groove portion along the thickness direction of the transparent laminate film is 0.5 mm or more and 3 mm or less. a second groove portion into which the lower edge of the transparent laminate film is inserted is formed in the film support portion;
The partition according to claim 1 or 2, wherein a gap is formed between the transparent laminate film and the second groove portion. The partition according to claim 3 , wherein the width of the second groove portion along the thickness direction of the transparent laminate film is 0.5 mm or more and 3 mm or less. The partition according to claim 3 or 4, wherein the second groove portion includes a first side surface facing the first surface and a second side surface facing the second surface, and the height of the first side surface is different from the height of the second side surface. a transparent laminate film having a first surface and a second surface located opposite the first surface;
A film support portion that supports the transparent laminate film,
the transparent laminate film includes a first-side antireflection layer that constitutes the first surface and a second-side antireflection layer that constitutes the second surface,
the transparent laminate film has an upper edge, a lower edge, and side edges extending between the upper edge and the lower edge;
a groove portion into which the lower edge of the transparent laminate film is inserted is formed in the film support portion;
The groove portion is curved in an S-shape in a plan view,
A gap is formed between the transparent laminate film and the groove portion,
The transparent laminate film is supported on the film support portion in a state where it can move relative to the film support portion. The partition according to claim 6, wherein the width of the groove along the thickness direction of the transparent laminate film is 0.5 mm or more and 3 mm or less. The partition according to claim 1 , wherein the transparent laminate film further comprises a core layer located between the first-side anti-reflection layer and the second-side anti-reflection layer. The partition of claim 8, wherein the transparent laminate film further comprises a first transparent adhesive layer that adheres the first-side anti-reflection layer and the core layer to each other, and a second transparent adhesive layer that adheres the core layer and the second -side anti-reflection layer to each other. The partition according to claim 1 , wherein the transparent laminate film further comprises a transparent adhesive layer that bonds the first-side anti-reflection layer and the second-side anti-reflection layer together. 11. The partition according to claim 1, wherein the transparent laminate film has a thickness of 300 μm or less. 12. The partition according to claim 1 , wherein the light reflectance of the transparent laminate film is 3.0% or less. 13. The partition according to claim 1, wherein the transparent laminate film has a total light transmittance of 90% or more. The partition according to any one of claims 1 to 13 , wherein the film support portion supports the transparent laminate film in a flattened state. The partition according to any one of claims 1 to 14 , further comprising a stand portion that supports the film support portion so that the first surface of the transparent laminate film is perpendicular to a horizontal plane. 16. A partition according to any one of the preceding claims , wherein corners between the top edge and the side edges are rounded. A transparent laminate film for use in the partition according to any one of claims 1 to 16 , having a first surface and a second surface located opposite to the first surface,
A transparent laminate film for a partition, comprising a first-side anti-reflection layer constituting the first side and a second-side anti-reflection layer constituting the second side. A building comprising a partition according to any one of claims 1 to 16 .