JP3486263B2 - Optical laminated sheet - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass-like optical laminated sheet suitable for various optical applications such as an electrode substrate of a liquid crystal cell of a liquid crystal display device.

[0002]

2. Description of the Related Art Conventionally, polycarbonate films, polyarylate films, polyether sulfone films, and polysulfone films have been used as optical base sheets. This is because these films have good optical isotropy and transparency, and have some heat resistance. Among these films, the polycarbonate film, which is advantageous in terms of cost, is most widely used. The polyethersulfone film and the polysulfone film have the highest heat resistance among these four types, but have the disadvantage of being slightly colored, and are expensive. The polyarylate film is in the middle position between the two.

Since only such a substrate sheet (polycarbonate film, polyarylate film, polyether sulfone or polysulfone film) lacks properties such as air permeability, solvent resistance and transparent electrode adhesion, one side of these films Alternatively, it has been proposed to laminate an air permeable resin layer or a crosslinkable resin cured product layer on both sides. For example, Japanese Patent Application Laid-Open No. 63-7 filed by the applicant.
No. 1829 (Electrode substrate for liquid crystal display panel having a layer structure of optically isotropic substrate sheet layer / anchor coat layer / air-permeable resin layer / cured resin composition) or JP-A-4-159518.
Gazette (Adhesion of two or more unit laminated sheets having a layer structure of optically isotropic substrate sheet layer / air-permeable resin layer / crosslinkable resin cured material layer so that the crosslinkable resin cured material layer becomes both outermost layers. Electrode substrate for a liquid crystal display panel having a structure in which it is adhered via an agent layer).

Recently, use of an amorphous polyolefin film as an optical base sheet has been proposed. The present applicant has also filed numerous applications for using various polymer films including amorphous polyolefin (bicycloolefin-based polyolefin, norbornene-based resin) as a base film such as an electrode substrate.

[0005]

Although the importance of plastic substrates instead of glass substrates is increasing, the above-mentioned base sheet or at least one side (particularly both sides) of the base sheet has a gas proof resin. The film in which a layer and a crosslinkable resin cured product layer are laminated and installed has rigidity, smoothness, heat resistance, surface hardness, air resistance, solvent resistance, as compared with conventional glass.
It is inferior in terms of liquid crystal resistance, etc., and does not reach the quality like glass.

That is, if the rigidity and smoothness are insufficient, display unevenness will occur due to nonuniformity of the gap between the substrates of the liquid crystal cell. When heat resistance and surface hardness are insufficient, when a transparent electrode is provided on the substrate and used as an electrode substrate, the pattern electrode and the outer lead of the control IC are collectively connected with an anisotropic conductive sheet therebetween. Problems will occur when thermocompression bonding is performed with the intervening state or when the alignment film is formed. If the air resistance is insufficient, deterioration of the liquid crystal over time cannot be ignored. If the solvent resistance and the liquid crystal resistance are insufficient, the transparency of the base material sheet may be impaired when the layers are laminated or the alignment film is formed, or the electrode substrate may be affected by the liquid crystal when the liquid crystal is sealed.

Against this background, the present invention is a sheet made of plastics, but is still excellent in rigidity, smoothness, heat resistance, surface hardness, air resistance, solvent resistance, liquid crystal resistance, etc. It is an object of the present invention to provide a glass-like optical sheet that gives a quality close to that of glass.

[0008]

The optical laminated sheet of the present invention comprises an organic air permeation resistant layer (2) on both sides of a substrate film (1).
X) and penetration resistance temper layer of organic of water penetration resistance temper layer of inorganic (two penetration resistance temper layer made 2Y) (2) (2X) are provided, further water penetration resistance temper layer of each organic ( 2X) is provided with an inorganic air permeation resistant layer (2Y) . In this case, an anchor coating layer (ac) may be provided between the adjacent layers.

The optical laminated sheet of the present invention embodied so that it can be used as a substrate, etc., has the above-mentioned inorganic air permeation resistance.
On the layer (2Y) , a heat-resistant and solvent-resistant resin layer is further formed directly or through a non-solvent type curable resin cured product layer (3).
(4) is provided. Also in this case, an anchor coating layer (ac) may be provided between the adjacent layers.

The present invention will be described in detail below.

As described above, the optical laminated sheet of the present invention has the organic air permeation resistant layer (2X) on both sides of the base film (1).
And two types of air-permeable layer consisting of inorganic air-permeable layer (2Y)
An organic gas-proof layer (2X) of (2) is provided , and
Inorganic air-permeable layer on each organic air-permeable layer (2X)
(2Y) is provided.

As the substrate film (1), a single-layer or multi-layer film such as a polycarbonate film, a polyarylate film, a polyethersulfone film, a polysulfone film and an amorphous polyolefin film is used. The base film (1) is often optically isotropic, but in special cases, a non-optically isotropic single-layer or multi-layer film having a polarizing function or a phase function may be used.

As the air permeation resistant layer (2), two kinds of organic air permeation resistant layer (2X) and inorganic air permeation resistant layer (2Y) are used.

The former organic air permeation-resistant layer (2X) may be polyvinyl alcohol or its copolymerized modified product / graft / polymer alloy or vinyl such as ethylene-vinyl alcohol copolymer having an ethylene content of 15 to 50 mol%. Examples thereof include an alcohol-based resin layer, a vinylidene chloride-based resin layer, and a high acrylonitrile-based resin layer, and the vinyl alcohol-based resin layer described above is particularly important. Organic air-permeable layer
The layer thickness of (2X) is about 2 to 30 μm (preferably 5 to 15 μm).
m)). This organic gas-proof layer (2X) is usually formed by a casting method.

Examples of the latter inorganic air permeation resistant layer (2Y) include SiO ₂ , SiOx, MgO, Al ₂ O ₃ and In.
Examples include layers of O ₂ , SnO ₂ , ZnO, and mixtures of two, three, or more of these. Although ITO is a typical example of a transparent electrode described later, such ITO can also be used as the inorganic air permeation resistant layer (2Y). The thickness of the inorganic air-permeable layer (2Y) is about 50 to 2000 angstrom (preferably about 100 to 1000 angstrom).
Is suitable, but the layer thickness is not necessarily limited to this range as long as the transparency can be secured. This inorganic breathable layer (2Y)
Is formed by a sputtering method, a vacuum deposition method, an ion plating method, or the like, and particularly a sputtering method.

The above optical laminated sheet is a symmetrical type (2Y)
The layer structure is / (2X) / (1) / (2X) / (2Y) . In addition, an anchor coating layer (a
c) may be provided. The most practical of these layer configurations is that the organic air permeation resistant layers (2X) and (2X) are first formed on both sides of the optically isotropic substrate film (1) via the anchor coating layer (ac). Are arranged and each
The inorganic air-permeable layer (2Y) is placed on the air-permeable layer (2X) of the machine.
It is a symmetrical (2Y) / (2X) / (ac) / (1) / (ac) / (2X) / (2Y) configuration.

The optical laminated sheet of the present invention embodied so that it can be used as a substrate or the like has the above-mentioned inorganic air permeation resistance.
On the layer (2Y) , a heat-resistant and solvent-resistant resin layer is further formed directly or through a non-solvent type curable resin cured product layer (3).
(4) in which is provided.

The heat and solvent resistant resin layer (4) is a curable type
Or a cross-linking resin layer, that is, ester acrylate, epoxy acrylate, urethane acrylate,
Layers of various active energy ray-curable resins such as silicone acrylate, layers of cured products of curable resins such as phenoxyether-based crosslinkable resins, internal crosslinking means (crosslinking) to polyamideimide-based resins and amorphous polyolefins. A layer prepared by compounding the agent) or external crosslinking means (irradiation with active energy rays) is preferably used. The heat-resistant and solvent-resistant resin layer (4) may be a single layer or a multi-layer. The heat and solvent resistant resin layer (4) may be of the same type as the non-solvent type curable resin cured product layer (3) described below. The thickness of the heat and solvent resistant resin layer (4) is not particularly limited, but is 2 to 200 μm or more, particularly 3 to 100 μm, and more preferably 5 to 50 μm.

As the non-solvent type curable resin cured product layer (3), cured product layers of various active energy ray curable resins such as ester acrylate, epoxy acrylate, urethane acrylate and silicone acrylate are preferably used. To be In addition, a layer of a non-solvent type thermosetting curable resin cured product may be used depending on the case. Curable resin cured product layer (3)
The thickness is not particularly limited, but is often 2 to 300 μm or more, particularly 2 to 100 μm, and further 2 to 50 μm. Note that the non-solvent type does not exclude cases in which a nominal amount of solvent is included.

Heat and solvent resistant resin layer (4) (or curable resin )
With heat solvent resistance resin layer (4)) via fat cured layer (3)
Since the optical laminated sheet of the present invention which is added is usually a symmetrical type, in that case, (4) / (2Y) / (2X) / (1) / (2X) / (2Y) / (4)
Or it becomes (4) / (3) / (2Y) / (2X) / (1) / (2X) / (2Y) / (3) / (4) . An anchor coating layer (ac) may be provided between adjacent layers to improve adhesion. The most practical of these layer configurations is that the organic air permeation resistant layers (2X) and (2X) are first placed on both sides of the optically isotropic substrate film (1) via the anchor coating layer (ac). It is, is
In addition, each of the organic gas-proof layers (2X) has an inorganic gas-proof layer.
Sexual layer (2Y) is arranged symmetrical (2Y) / (2X) / (ac) / (1) / (a
(4) / (2Y) / (2X) / (a) in which (4) or (3) / (4) is further arranged on both sides of the film having a layer structure of (c) / (2X) / (2Y).
c) / (1) / (ac) / (2X) / (2Y) / (4) or (4) / (3) / (2Y) / (2X) /
The configuration is (ac) / (1) / (ac) / (2X) / (2Y) / (3) / (4).

In addition to the above, (2Y) / (2X) / (1) / (2X) / (2Y) /
(4) , (2Y) / (2X) / (1) / (2X) / (2Y) / (3) / (4) , (4) / (2Y) /
Asymmetrical configurations such as (2X) / (1) / (2X) / (2Y) / (3) / (4) are also possible.

The above optical laminated sheet is industrially preferably manufactured as follows. As an example
Describe representative examples of the case of obtaining the optical laminated sheet of a layer structure of a semi-finished product (1) / (2X) / (2Y) / (3) / (4), a semi-finished product as another example ( A typical example for obtaining an optical laminated sheet having a layer structure of 1) / (2X) / (2Y) / (4) will be described.
However, various manufacturing methods other than these are possible.

To obtain an optical laminated sheet having a layer structure of (1) / (2X) / (2Y) / (3) / (4), first, a layer structure of (1) / (2X) / (2Y) is prepared. The laminated film is prepared, and the laminated film having the heat and solvent resistant resin layer (4) formed on the mold film (S) by the casting method is prepared.

Here, as the template film (S), biaxially oriented polyester (polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate) film, biaxially oriented polypropylene film or the like film which serves as a support is preferably used. Since the smoothness of the surface of this support film can be arbitrarily selected, the surface roughness is ±
Any smoothness or roughness from 0.1 μm or less with extremely high smoothness to those with intentionally random fine unevenness or lens-like fine unevenness for imparting antiglare property, increasing incident light amount, etc. Can be used.

Then, one roll of a pair of rolls arranged in parallel with a slight gap is provided with the above (1) / (2
(X) / (2Y) layered laminated film is fed so that the (2Y) surface of the outermost layer is the upper surface, and the above is applied to the other roll.
The laminated film having the layer structure of (4) / (S) is supplied so that the (4) surface is the upper surface, and the non-solvent type curable resin liquid is discharged toward the gap between both rolls and The curable resin liquid is sandwiched between both laminated films by rotating the rolls in the direction of biting each other, and then the curable resin liquid is cured in the sandwiched state to form the curable resin cured product layer (3 ) After curing, it may be preferable to perform a heat treatment if necessary. This
A semi-finished product with a layer structure of (1) / (2X) / (2Y) / (3) / (4) / (S) is obtained. The template film (S) may be peeled off at an appropriate stage after that, and depending on the application, it can be used as an optical laminated sheet with the template film (S) attached. The above heat treatment can also be performed after peeling and removing the template film (S).

When obtaining an optical laminated sheet having a layer structure of (1) / (2X) / (2Y) / (4) , first, a laminated film having a layer structure of (1) / (2X) / (2Y) is used. Prepare and also prepare the mold film (S).

Then, one roll of a pair of rolls arranged in parallel with a slight gap is provided with the above (1) / (2
The laminated film having a layer structure of (X) / (2Y) is supplied so that the (2Y) surface of the outermost layer is the upper surface, and the above-mentioned mold film (S) is supplied to the other roll, and both rolls are supplied. A non-solvent type curable resin liquid that can form the heat-resistant and solvent-resistant resin layer (4) is discharged toward the gap, and both rolls are rotated in the direction of biting each other so that the curable resin liquid is formed between both films. It is sandwiched, and then the curable resin liquid is cured in the sandwiched state to form the heat and solvent resistant resin layer (4). This makes (1) / (2X) / (2Y) / (4) / (S)
A semi-finished product with the layer structure of is obtained. After curing, it may be preferable to perform a heat treatment if necessary. The template film (S) may be peeled off at an appropriate stage after that, and depending on the application, it can be used as an optical laminated sheet with the template film (S) attached. The above heat treatment can also be performed after peeling and removing the template film (S).

[0028] is symmetric of a finished product (4) / (2Y) / (2X) / (1) /
(2X) / (2Y) / (4) or (4) / (3) / (2Y) / (2X) / (1) / (2X) / (2Y) /
When manufacturing (3) / (4) , for example, (2Y) / (2X) / (1) / (2
(3) / (4) or (4) layer is first formed on one side using the laminated film of (X) / (2Y) according to the above, and then (3) / (4) is similarly formed on the other side. The layer of () or (4) may be formed.

A transparent electrode such as ITO can be formed on the heat and solvent resistant resin layer (4) of the optical laminated sheet of the present invention. In this case, if necessary, it is also preferable to form an undercoat layer of a metal oxide or the like before forming the transparent electrode. The installation of the undercoat layer is advantageous in terms of moisture proofness, air proofness, transparent electrode adhesion, and the like, and is also a plus for preventing curling and improving reliability in the transparent electrode patterning step and the water washing step.

The optical laminated sheet of the present invention is particularly useful as an electrode substrate of a liquid crystal cell which constitutes a liquid crystal display device, and also serves as a polarizing plate protective plate, a retardation film protective plate and a polarizing plate. Electrode substrate, electrode substrate also used as a phase plate, film with transparent electrode for touch panel (including those laminated not only on the polarizing plate but also below the polarizing plate), CR
It can also be used for applications such as an electromagnetic wave shield plate for T, a backlight, a light guide plate, a color filter, an optical card, an optical tape, and an optical disk.

[0031]

In the optical laminated sheet of the present invention, two types of the organic air-permeable layer (2X) and the inorganic air-permeable layer (2Y) are provided on both sides of the base film (1). impermeability temper layer of an organic (2X) are provided within the permeable layer (2), further respective
An inorganic gas permeable resistant layer (2Y) is provided on the organic gas permeable resistant layer (2X) . When it is embodied so that it can be used as a substrate, etc., it may be a direct or non-solvent type curable resin cured product layer on the above-mentioned inorganic air permeable resistant layer (2Y).
A heat and solvent resistant resin layer (4) is further provided via (3).

As described above, in the optical laminated sheet of the present invention , the organic air permeation resistant layer is provided on both surfaces of the base film (1).
(2X) and the inorganic air-permeable layer (2Y) are arranged next to each other in this order (anchor coating layer between both layers).
(ac) may be present), organic air-permeable layer (2
The decrease in the air permeation resistance under the high humidity condition of (X) is compensated by the inorganic air permeation resistant layer (2Y), and the decrease in the air permeation resistance due to the fragility of the inorganic air permeation resistant layer (2Y) does not occur. Organic air-permeable layer (2
X), and therefore these multiple air-permeable layers (2X), (2
With Y), the air resistance is perfected, and excellent air resistance is ensured in any environment.

Further, since the base material film (1) is used, the necessary mechanical properties and thickness as the base are secured, and further, the heat and solvent resistant resin layer (4) or this and the non-solvent type curability are used. Due to the presence of the cured resin layer (3),
The necessary properties such as rigidity, heat resistance, solvent resistance, hardness, and adhesion to a transparent electrode such as ITO can be secured.

Therefore, the optical laminated sheet of the present invention is
Although it is a plastic sheet, it becomes a glass-like material that gives a quality close to that of glass, and is extremely preferable as an electrode substrate of a liquid crystal cell that constitutes a liquid crystal display element.

In producing the optical laminated sheet, as described above, a pair of rolls and a mold film are used.
When (S) is used and the method of sandwiching a non-solvent type curable resin liquid between two films and curing it is adopted, the desired optical laminated sheet is manufactured in an industrially extremely advantageous manner. can do.

[0036]

EXAMPLES The present invention will be further described with reference to examples. The surface roughness was measured with a non-contact type surface roughness meter utilizing light interference.

Example 1 FIG. 1 is an explanatory view showing an example of the layer structure of the optical laminated sheet of the present invention.

As an example of the optically isotropic substrate film (1), a polycarbonate film having a thickness of 105 μm and a retardation value of 6 nm is cast on one side with a water-soluble polyester urethane anchor coating agent having a solid content of 5% by weight and dried. By curing, an anchor coating layer (ac) having a thickness of 1 μm was formed. Then, from above the anchor coating layer (ac), N of polyvinyl alcohol
-A methylol acrylamide-acrylic acid graft copolymer in an aqueous solution having a concentration of 12% by weight is added to a methylol melamine-based cross-linking agent ("Sumitec M-" manufactured by Sumitomo Chemical Co., Ltd.).
3 ") was mixed at a weight ratio of solids of 100: 3, cast, dried at 70 to 90 ° C, and had a thickness of 8 µm.
The organic air-permeable layer (2X) was formed. Similarly, an anchor coating layer (ac) having a thickness of 1 μm and an organic air permeation resistant layer (2X) having a thickness of 8 μm were formed on the other surface of the optically isotropic substrate film (1). As a result, (2X) / (ac) / (1) /
A laminated film having a layer structure of (ac) / (2X) was obtained.

Then, on one surface of this laminated film, an inorganic air-permeable layer (2) made of a metal oxide mainly composed of SiOx and having a thickness of 300 Å was formed by a sputtering method.
Y) is formed on the other surface of the laminated film.
A 0 angstrom inorganic air permeation resistant layer (2Y) was formed. As a result, (2Y) / (2X) / (ac) / (1) / (ac) / (2X) / (2Y)
A laminated film having the layer structure of was obtained.

On the other hand, a polyamide-imide resin (“AT8020” manufactured by Toyobo Co., Ltd.) cyclohexanone /
Phenol novolac epoxy resin (“YPDN-made by Tohto Kasei Co., Ltd.”
638 ") was mixed at a weight ratio of 10: 1 to prepare a solution of a resin composition having a solid content of 15% by weight.

Then, a solution of this composition was added to a thickness of 100 μm.
m, surface roughness average 0.006 μm, maximum 0.04 μm cast on a smooth surface of a mold film (S) made of non-corona discharge treated biaxially stretched polyethylene terephthalate film, hot air at a temperature of 60-110 ℃ After drying, the temperature is 12
Cure at 0 ° C for 25 minutes, then 150-180 ° C
Heat treatment was performed for 20 minutes to form a heat resistant and solvent resistant resin layer (4) having a thickness of 30 μm.

The above (2Y) / (2X) / (ac) is applied to one of the pair of rolls arranged in parallel with a slight gap.
/ (1) / (ac) / (2X) / (2Y) is supplied as a laminated film, and the other roll has the above heat-resistant and solvent-resistant resin layer.
A laminated film composed of (4) / mold film (S) was supplied so that the heat- and solvent-resistant resin layer (4) side faced up.

Subsequently, toward the gap between these two rolls, an epoxy acrylate-based highly viscous UV-curable resin liquid (“TUR-980L” manufactured by Teikoku Chemical Industry Co., Ltd. as an example of a non-solvent type curable resin liquid is used. 100 parts by weight of non-solvent type aliphatic polyisocyanate "Coronate H" manufactured by Nippon Polyurethane Industry Co., Ltd.
K) is blended in 5 parts by weight) and both rolls are rotated in such a manner as to bite each other so that the above curable resin liquid is sandwiched between both laminated films, and then the sandwiched state Then, by curing the curable resin liquid by UV irradiation under the conditions of output 120 W / cm, 1 lamp, lamp distance 150 mm, and integrated light quantity 1000 mJ / cm ² , a curable resin cured product layer (3) with a thickness of 8 μm Then, heat treatment was further performed at a temperature of 130 ° C. for 10 minutes.

As a result, (2Y) / (2X) / (ac) / (1) / (ac) / (2
Since a laminated film having a layer structure of (X) / (2Y) / (3) / (4) / (S) was obtained, this laminated film and the above heat- and solvent-resistant resin layer (4) / mold The above operation was repeated using the laminated film having the layer structure of the film (S). As a result, (S) / (4) / (3) / (2Y) / (2X) / (ac) / (1) / (ac) / (2X) / (2Y) /
Symmetrical mold film having a layer structure of (3) / (4) / (S)
Since the optical laminated sheet with (S) and (S) was obtained, the mold films (S) and (S) were peeled and removed at an appropriate stage after that.

This optical laminated sheet had rigidity, and its characteristic values as a whole were as follows. The solvent resistance was evaluated by the appearance change when the sheet was immersed in each solvent of acetone, methyl ethyl ketone, ethanol, isopropanol, toluene, and cellosolve acetate at 25 ° C. for 5 minutes. The heat resistance was measured by cutting out only the outermost heat-resistant and solvent-resistant resin layer (4). Visible light transmittance at 550 nm: 88% Retardation value (633 nm): 7 nm Heat resistance of layer (4) (glass transition point by DSC): 180
℃ solvent resistance: good oxygen permeability (measured according to ASTM D-1434-75): 0.1cc / 24
hr ・ m ²・ atm or less Pencil hardness (JIS K5401): 2H Surface roughness of outermost layer: 0.06 μm on average, 0.1 μm at maximum

Next, on one side of the optical sheet obtained above,
According to a conventional method, an undercoat layer made of a metal oxide was formed, and then a transparent electrode composed of an ITO layer having a thickness of 500 angstrom was formed. Then, according to a conventional method, resist formation, exposure, development, etching, and removal of the cured resist were performed to obtain a patterned electrode.

After a liquid crystal cell was produced using the substrate made of this optical laminated sheet with a pattern electrode, the pattern electrode and the outer lead of the control IC were collectively connected.
150 ° C with an anisotropic conductive sheet interposed between the two
It was carried out by thermocompression bonding under the condition of × 0.5MPa × 10 seconds. During the thermocompression bonding, the conductive particles did not dwarf and the phenomenon that the electrode substrate was deformed into a concave shape at the conductive particles was observed. No (the conductive particles did not penetrate into the electrode substrate), and as a result, no damage defect such as cracking occurred in the pattern electrode.

From the above results, the optical laminated sheet obtained above has a glass-like property close to that of a conventional glass substrate, and is extremely useful as an electrode substrate of a liquid crystal cell of a liquid crystal display device. Recognize.

Example 2 FIG. 2 is an explanatory view showing another example of the layer structure of the optical laminated sheet of the present invention.

In the same manner as in Example 1, (2Y) / (2X) / (ac) /
A laminated film having a layer structure of (1) / (ac) / (2X) / (2Y) was obtained. However, as the optically isotropic substrate film (1), a polyarylate film having a thickness of 105 μm and a retardation value of 8 nm was used.

The above laminated film was fed to one roll of a pair of rolls arranged in parallel with a slight gap, and the other roll had a thickness of 100 μm and a surface roughness of 0.006 μm on average, and a maximum. Then, a mold film (S) made of a biaxially stretched polyethylene terephthalate film not subjected to a corona discharge treatment of 0.04 μm was supplied so that its smooth surface was the upper surface.

Subsequently, toward the gap between the rolls, an ester acrylate-based highly viscous UV curable resin liquid 10 as an example of a non-solvent type curable resin liquid is used.
4 parts by weight of 0 parts by weight of the above-mentioned non-solvent type aliphatic polyisocyanate "Coronate HK" was discharged, and both rolls were rotated in a direction of biting into each other so that the above-mentioned curable resin was formed between both films. The liquid is sandwiched, and then, in the sandwiched state, the output 12
0W / cm, 1 lamp, lamp distance 150mm, total light intensity 1000
A heat- and solvent-resistant resin layer with a thickness of 12 μm is obtained by curing the curable resin liquid by irradiating it with ultraviolet rays under the conditions of mJ / cm ^2.
In (4), heat treatment was further performed at a temperature of 130 ° C. for 10 minutes.

As a result, (2Y) / (2X) / (ac) / (1) / (ac) / (2
Since a laminated film having a layer structure of (X) / (2Y) / (4) / (S) was obtained, the above operation was repeated using this laminated film and the template film (S). It was As a result, (S) / (4) / (2Y) / (2X) / (ac) / (1) / (ac) / (2X) / (2Y) / (4) /
Since a symmetrical type mold film (S) having a layer structure of (S), and an optical laminated sheet with (S) were obtained, the mold film (S) and (S) were peeled off at an appropriate stage after that. .

The optical laminated sheet thus obtained also comprises
Similar to the case of Example 1, it had a glass-like property close to that of a conventional glass substrate.

[0055]

INDUSTRIAL APPLICABILITY The optical laminated sheet of the present invention is a plastic sheet, but it is a glass-like material that gives a quality close to that of glass, and is extremely preferable as an electrode substrate of a liquid crystal cell constituting a liquid crystal display device. .
Moreover, the production is also an industrial method that can be mass-produced.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an example of a layer structure of an optical laminated sheet of the present invention.

FIG. 2 is an explanatory diagram showing another example of the layer structure of the optical laminated sheet of the present invention.

[Explanation of symbols]

(1) ... Base film, (2) ... air-permeable layer, (2X) ... organic air-permeable layer, (2Y) ... inorganic air-permeable layer, (3) ... a curable resin cured product layer, (4)… Heat-resistant and solvent-resistant resin layer, (ac) ... Anchor coating layer, (S)… Mold film

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Komori 1-4-16 Nihombashi Bakurocho, Chuo-ku, Tokyo Fujimori Kogyo Co., Ltd. (56) Reference JP-A-60-190342 (JP, A) JP-A 7-164591 (JP, A) JP-A-3-86539 (JP, A) JP-A-7-24978 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B32B 1/00 -35/00

Claims (3)

(57) [Claims] 1. An organic gas-permeable layer (2) comprising an organic gas-permeable layer (2X) and an inorganic gas-permeable layer (2Y) on both sides of a substrate film (1). The air permeable resistant layer (2X) is provided, and further the inorganic air permeable resistant layer (2Y) is provided on each organic air permeable resistant layer (2X), and an anchor is provided between adjacent layers. even if the coating layer (ac) is not provided
Optical optics laminated sheet. To 2. A on penetration resistance temper layer of inorganic (2Y), the configuration directly or further heat solvent resistance resin layer via the non-solvent type curable resin cured layer (3) (4) is provided The optical laminated sheet according to claim 1, further comprising an anchor coating layer (ac) provided between adjacent layers. 3. A heat-resistant and solvent-resistant resin layer (4) is a curable type or a rack.
The optical laminated sheet according to claim 1, which is a bridge-shaped resin layer.
To.