JP6992282B2 - Cosmetic sheet - Google Patents

Description

The present invention relates to a decorative sheet.

Conventionally, as a decorative sheet, for example, there is a technique described in Patent Document 1. The technique described in Patent Document 1 includes a pattern layer formed on a sheet base material, a matte layer formed on the pattern pattern layer, and a surface protective layer formed on the matte layer. The surface protective layer contains synthetic resin beads protruding from the surface protective layer. As a result, the surface of the decorative sheet is provided with irregularities so that a three-dimensional effect can be felt by touch. Further, a technique as described in Patent Document 2 is also known for a synchronized decorative sheet having two or more layers of patterns.

JP-A-2015-77709 JP-A-2015-199313

However, in the technique described in Patent Document 1, the surface protective layer is an acrylic resin. Therefore, since the hardness of the surface of the decorative sheet is relatively low, the scratch resistance is low and the stain resistance may be low. Further, although the technique described in Patent Document 2 can obtain a visual three-dimensional effect, when it is actually touched, it remains flat, and a sense of incongruity may remain.

The present invention focuses on the above points, and an object of the present invention is to provide a decorative sheet having excellent stain resistance and design while maintaining a three-dimensional effect by tactile sensation, and further having a visual three-dimensional effect. There is.

In order to solve the above problems, in one aspect of the present invention, a pattern layer, a transparent adhesive layer, a transparent thermoplastic resin layer having an embossed uneven pattern on a resin base sheet, and a surface protective layer are in this order. A first surface protective layer containing a thermosetting resin having a urethane bond formed on the transparent thermoplastic resin layer, and a second surface protective layer partially formed on the first surface protective layer. The second surface protective layer is formed with a pattern synchronized with the pattern of the pattern layer.
Moreover, the areas of the second surface protective layer and the pattern layer are each 0.1% or more with respect to the area of the first surface protective layer.
Moreover, the second surface protective layer contains a thermosetting resin and is characterized by containing 5% by mass or more and 35% by mass or less of silica particles with respect to the total mass of the thermosetting resin.

According to one aspect of the present invention, since the first surface protective layer is formed of a resin having high hardness and the second surface protective layer is formed, the first surface protective layer provides scratch resistance and stain resistance. Can be improved. Further, since the second surface protective layer is formed with a pattern synchronized with the pattern of the pattern pattern layer, it is possible to give a visual three-dimensional effect more than before, thereby synchronizing the visual three-dimensional effect and the tactile three-dimensional effect. be able to.

Therefore, it is possible to provide a decorative sheet having excellent scratch resistance and stain resistance and having a visual three-dimensional effect while maintaining a three-dimensional effect by tactile sensation.

It is sectional drawing which shows the decorative sheet which concerns on embodiment of this invention.

Next, an embodiment of the present invention will be described with reference to the drawings. Here, the drawings are schematic, and the relationship between the thickness and the plane dimensions, the ratio of the thickness of each layer, and the like are different from the actual ones. Further, the embodiments shown below exemplify a configuration for embodying the technical idea of the present invention, and the technical idea of the present invention describes the materials, shapes, structures, etc. of the constituent parts as follows. It is not specific to the thing. The technical idea of the present invention may be modified in various ways within the technical scope specified by the claims described in the claims.

As shown in FIG. 1, the decorative sheet 8 of the present embodiment has a pattern layer 2, a transparent adhesive layer 3, and a transparent thermoplastic resin layer 4 on one surface (hereinafter referred to as a surface) side of the sheet base material 1. Is laminated, and further, the first surface protective layer 5 and the second surface protective layer 6 are laminated.

Further, a back surface resin coat layer 7 constituting a resin layer is provided on a surface of the base material sheet 1 opposite to the pattern layer 2 (hereinafter referred to as a back surface). The back surface resin coat layer is provided as needed and is not essential.

The resin base sheet 1 is made of, for example, a colored thermoplastic resin. As the thermoplastic resin, for example, vinyl chloride resin, acrylic resin, polyolefin-based polypropylene resin, polyethylene resin, or the like can be used. Among them, polyolefin resins can be preferably used in terms of environmental compatibility, processability, and price. The grade and composition of the resin can also be selected in consideration of ease of seating, printability, and suitability for bending.

When the base sheet 1 is colored, the base material to which the decorative sheet is attached can be concealed, and the hue can be appropriately selected as the base color of the pattern layer 2. For example, when seating a thermoplastic resin, coloring can be achieved by mixing and kneading a colorant such as a pigment. Alternatively, a colored layer may be provided under the pattern layer 2 by a coating or printing method as a solid ink layer before the pattern layer 2 is provided.

The pattern pattern layer 2 is formed on the sheet base material 1 by a known printing method, and is a layer for adding a pattern for imparting designability. The printing method is not particularly limited, but a gravure printing method can be used, for example, in consideration of productivity and the quality of the pattern. As the pattern, for example, a pattern suitable for a place where the decorative sheet 8 is used, such as wood grain, cork, stone grain, tile, pottery, and an abstract pattern, can be selected.

The printing ink is not particularly limited, but an ink corresponding to the printing method can be appropriately selected. In particular, it is preferable to select it in consideration of adhesion to the resin base sheet 1, printability, and weather resistance as a flooring material.

If necessary, an adhesive layer (not shown) is placed on the pattern layer 2 for the purpose of improving the adhesiveness between the pattern layer 2 and the transparent adhesive layer 3 and the transparent adhesive layer 3 and the transparent thermoplastic resin layer 4. May be provided. The resin used for this adhesive layer (not shown) is not particularly limited, but for example, a two-component curable urethane resin or the like can be used, and for example, a coating device, a gravure printing device, or the like can be used to provide the resin.

The transparent adhesive layer 3 is provided for the purpose of strengthening the adhesion between the base sheet 1 and the pattern layer 2 and the transparent thermoplastic resin layer 4. When this adhesion is strong, it is possible to impart bending workability to the decorative sheet 8 so as to follow a curved surface or a right-angled surface.

As the transparent thermoplastic resin layer 4, for example, a vinyl chloride resin, an acrylic resin, a polyolefin-based polypropylene resin, a polyethylene resin, or the like can be used. Among them, polyolefin resins can be preferably used in terms of environmental compatibility, processability, and price.

The grade and composition of the resin can also be selected in consideration of ease of seating, printability, and suitability for bending. In particular, it is important to select the bending workability in consideration of the fact that whitening and cracking of the bent portion do not occur.

The transparent adhesive layer 3 and the transparent thermoplastic resin layer 4 can be formed by extruding both at the same time by, for example, coextrusion.

The transparent thermoplastic resin layer 4 has the effect of increasing the thickness and depth of the decorative sheet in terms of design, and can improve the weather resistance and wear resistance of the decorative sheet.

The first surface protective layer 5 is a sheet-like layer formed on the transparent thermoplastic resin layer 4 and covering the entire transparent thermoplastic resin layer 4. The first surface protective layer 5 is formed of a transparent or translucent material (resin) to the extent that the pattern of the pattern layer 2 can be seen through the first surface protective layer 5. The first surface protective layer 5 may be a single layer, or a plurality of layers may be stacked to form the surface protective layer 5.

As the material of the first surface protective layer 5, for example, a thermosetting resin is preferable because it has good stain resistance and scratch resistance. The thermosetting resin has, for example, a urethane bond such as a two-component curable urethane resin in consideration of adhesion to the second surface protective layer 6, deformation followability of the decorative sheet 8, scratch resistance, and the like. It is preferable to use a thermosetting resin (binder). A matting agent such as silica particles may be added to the thermosetting resin. Further, as the solvent, ethyl acetate or n-butyl acetate can be used.

As the two-component curable urethane resin, for example, a urethane resin containing a polyol as a main component and an isocyanate as a cross-linking agent (curing agent) can be used. As the polyol, those having two or more hydroxyl groups in the molecule, for example, polyethylene glycol, polypropylene glycol, acrylic polyol, polyester polyol, polyether polyol, polycarbonate polyol, polyurethane polyol can be used.

Further, as the isocyanate, a multivalent isocyanate having two or more isocyanate groups in the molecule can be used. For example, aromatic isocyanates such as 2,4-tolylene diisocyanate, xylene diisocyanate and 4,4'-diphenylmethane diisocyanate, or 1,6-hexamethylene diisocyanate, isophorone diisocyanate, hydrogenated tolylene diisocyanate, hydrogenated diphenylmethane diisocyanate and the like. (Or alicyclic) isocyanate can be used. Further, adducts or multimers of the above-mentioned various isocyanates can be used.

For example, there are an adduct of tolylene diisocyanate, a trimer of tolylene diisocyanate, and the like. Among the above-mentioned isocyanates, the aliphatic (or alicyclic) isocyanate is preferable in that it can have good weather resistance and heat-resistant yellowing, and for example, 1,6-hexamethylene diisocyanate can be used.

Further, since the first surface protective layer 5 contains a thermosetting resin having a urethane bond, that is, a resin having high hardness, it is exposed not only on the surface-exposed portion but also on the surface by the second surface protective layer 6. The scratch resistance and stain resistance of the decorative sheet 8 can be improved by the first surface protective layer 5 even in the portion where the decorative sheet 8 is not used.

The second surface protective layer 6 is a layer that is partially formed on the first surface protective layer 5 with a pattern synchronized with the pattern of the pattern layer 2 and covers a part of the first surface protective layer 5. be. Thereby, the design of the decorative sheet 8 can be expressed by both the visual sense derived from the pattern layer 2 and the tactile sensation derived from the unevenness of the second surface protective layer 6.

The second surface protective layer 6 may be formed, for example, in an area of 0.1% or more on the first surface protective layer 5. In this case, since the second surface protective layer 6 is synchronized with the pattern layer 2, the pattern layer 2 may also be formed in an area of 0.1% or more. In this case, it is preferable that the area without the second surface protection layer 6 and the pattern layer 2 is not wide as much as possible. If there is a region where the pattern layer 2 is not provided, that is, a region where the second surface protective layer 6 is not provided, the tactile sensation of the first surface protective layer 5 is obtained.

In the present embodiment, since the first surface protective layer 5 has high scratch resistance and stain resistance, even if the area of the second surface protective layer 6 is small, the decorative sheet 8 has scratch resistance and stain resistance. It can be excellent.

Further, the second surface protective layer 6 is formed of a transparent or translucent material (resin) to the extent that the pattern of the pattern layer 2 can be seen through the second surface protective layer 6 and the first surface protective layer 5. Has been done. As the material of the second surface protective layer 6, for example, an ionizing radiation curable resin may be used. As the ionizing radiation curable resin, for example, an ultraviolet curable resin is preferable. As the ultraviolet curable resin, for example, (meth) acrylic resin, silicone resin, polyester resin, urethane resin, amide resin, and epoxy resin can be used. Thereby, the hardness of the second surface protective layer 6, that is, the outermost surface layer of the decorative sheet 8 can be improved, and the surface physical properties such as the wear resistance, the scratch resistance, and the solvent resistance of the decorative sheet 8 can be improved. Further, for example, the binder may be configured to use a mixture of a thermosetting resin and an ionizing radiation curable resin.

Further, in the present embodiment, an example in which synthetic resin beads are added to a thermosetting resin is shown, but other configurations may be adopted, and for example, a configuration in which a filler of an inorganic compound is added may be used.

Further, the shape of the second surface protection layer 6 is not particularly limited as long as it is synchronized with the pattern layer 2, and may be a regular shape such as a circle, a quadrangle, or a hexagon, and is irregular. It may have a nice pattern shape.

In this way, by forming the second surface protective layer 6 in a pattern synchronized with the pattern of the pattern layer 2, the second surface protective layer 6 and the pattern layer 2 appropriately give a visual three-dimensional effect. Can be expressed. Further, since the ionizing radiation curable resin has a high hardness, the scratch resistance and stain resistance of the decorative sheet 8 can be further improved.

The silica particles contained in the second surface protective layer 6 are preferably contained in an amount of 5% by mass or more based on the total mass of the thermosetting resin. Thereby, the gloss of the second surface protective layer 6 can be sufficiently reduced, and the gloss difference between the second surface protective layer 6 and the first surface protective layer 5 can be adjusted. Therefore, even if the area of the second surface protective layer 6 is smaller than the total area of the first surface protective layer 5, the visual three-dimensional effect can be appropriately felt. The upper limit of the silica particles is 35% by mass or less with respect to the total mass of the thermosetting resin in order to prevent blocking and deterioration of stain resistance.

As the beads to be added to the surface protective layer 6, for example, acrylic resin beads having high transparency as synthetic resin beads or surface-treated inorganic fillers can be used. Acrylic resin beads are preferable in consideration of adhesion to the binder resin. As a result, the transparency of the second surface protective layer 6 can be improved, and the pattern of the pattern pattern layer 2 for imparting a design can be seen through more clearly. The average particle size of the beads to be added is 30 μm or more in order to prevent embedding in the second surface protective layer 6 and to ensure scratch resistance. Further, as the solvent, ethyl acetate or n-butyl acetate can be used.

Further, on the surface of the second surface protective layer 6, the maximum height R _max value measured by a contact roughness meter is 30 μm or more, and the load length ratio R _mr at a cutting level of 50 height% is 3 to 33%. And. It was found that when R _mr is lower than this, it is sparse and lacks unevenness, and when it is high, it feels smooth without unevenness. As a result, the three-dimensional effect of the tactile sensation can be felt more appropriately.

As described above, in the present embodiment, the second surface protective layer 6 is formed with a pattern synchronized with the pattern of the pattern layer 2, so that the second surface protective layer 6 and the pattern layer 2 are visually appealing. The three-dimensional effect can be expressed appropriately. Further, since the second surface protective layer 6 contains silica particles , a three-dimensional effect can be felt by touch.

The invention according to the present embodiment has the following effects. The decorative sheet 8 according to the present embodiment has a pattern layer 2 formed on the sheet base material 1, a first surface protective layer 5 formed on the pattern layer 2, and a first surface protective layer 5. It is provided with a second surface protective layer 6 partially formed on the top. The first surface protective layer 5 contains a thermosetting resin having a urethane bond. Further, the second surface protective layer 6 contains silica particles .

In this way, the first surface protective layer 5 is formed of a resin having a high hardness, and the second surface protective layer 6 is formed with a pattern synchronized with the pattern of the pattern layer 2, so that a three-dimensional effect due to tactile sensation is maintained. However, it is possible to provide a decorative sheet having excellent scratch resistance and stain resistance and having a visual three-dimensional effect.

According to the configuration such as the decorative sheet 8 according to the present embodiment, in which the second surface protective layer 6 contains 5% by mass or more and 35% by mass or less of silica particles, the silica contained in the second surface protective layer 6 Since the particles are set to 5% by mass or more and relatively large, the gloss of the second surface protective layer 6 can be sufficiently reduced, and the gloss difference between the second surface protective layer 6 and the first surface protective layer 5 can be increased. .. Therefore, for example, even if the area of the second surface protective layer 6 is small, the visual three-dimensional effect can be appropriately felt.

Further, the surface of the second surface protective layer 6 such as the decorative sheet 8 according to the present embodiment has a maximum height R _max value of 30 μm or more measured by a contact roughness meter, and a cutting level of 50 height. According to the configuration in which the load length ratio R _rm in% is 3 to 33%, the three-dimensional effect due to the tactile sensation can be felt more appropriately.

Further, according to the configuration in which the beads added to the surface protective layer 6 such as the decorative sheet 8 according to the present embodiment are acrylic resin beads, the transparency of the second surface protective layer 6 can be improved, and the second surface protective layer 6 can be improved. Through the surface protective layer 6 of the above, the pattern of the pattern pattern layer 2 for imparting a design can be seen through more clearly.

Further, according to the configuration in which the second surface protective layer 6 includes the ionizing radiation curable resin and silica particles, such as the decorative sheet 8 according to the present embodiment, the first surface protective layer 5 and the like are adjacent to each other. It is possible to improve the adhesiveness with the layer, the deformation followability of the decorative sheet 8, and the scratch resistance.

Further, according to the configuration in which the first surface protective layer 5 contains a thermosetting resin having a urethane bond, such as the decorative sheet 8 according to the present embodiment, the pattern layer 2 and the second surface protective layer 6 are provided. It is possible to improve the adhesiveness with other layers such as, the deformation followability of the decorative sheet 8, and the scratch resistance.

1 Sheet base material 2 Pattern pattern layer 3 Transparent adhesive layer 4 Transparent thermoplastic resin layer 5 First surface protective layer 6 Second surface protective layer 7 Back surface resin coat layer 8 Decorative sheet

Claims (2)

A pattern layer, a transparent adhesive layer, a transparent thermoplastic resin layer having an embossed uneven pattern, and a surface protective layer were formed in this order on the resin base material sheet, and were formed on the transparent thermoplastic resin layer. The second surface protective layer comprises a first surface protective layer containing a thermosetting resin having a urethane bond and a second surface protective layer partially formed on the first surface protective layer. Is formed in a pattern synchronized with the pattern of the pattern layer.
Moreover, the areas of the second surface protective layer and the pattern layer are each 0.1% or more with respect to the area of the first surface protective layer.
Moreover, the decorative sheet is characterized in that the second surface protective layer contains a thermosetting resin and contains 5% by mass or more and 35% by mass or less of silica particles with respect to the total mass of the thermosetting resin. The decorative sheet according to claim 1, wherein the second surface protective layer further contains an ionizing radiation curable resin .

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