TW201121794A - Optical laminate and manufacturing method thereof - Google Patents

Abstract

The provided optical laminate 10 is formed by adhering a glass plate 1 and plastic sheet 3 by means of an adhesive layer 2 of the adhesive composition containing polyvinylalcoholic resins. The optical laminate 10 can be manufactured by the steps of: (a) forming a layer of adhesive solution containing polyvinylalcoholic resins onto the adhering surface of the glass plate 1 and/or the adhering surface of the plastic sheet; (b) adhering the glass plastic 1 and the plastic sheet together by using the adhesive layer; (c) checking the adhered production and removing the product from which a defect is found from the production line; and (a) curing the adhesive layer of the adhered products from which no defect is found.

Description

201121794 VI. Description of the invention: [Technical field to which the invention pertains] The invention relates to the optical reed body of the Kawagawa% liquid crystal display device, and the other is related to the type of 曰-曰·®* Liquid 曰 开 开 幺 a ip becomes the central component of the liquid display day ==: The glass plate is formed by the adhesive layer, and the optical layer is represented by the polarizing plate. The second layer of the optical laminate. Further, this [Prior Art] As a polarizing plate, a hetero-= optical member is useful. The polarizing plate of the protective layer of one or both sides of the diaphragm with water-based adhesive == :== is slippery and the transparency of the transparency or moisture permeability is formed by the transparent tree meniscus*, A transparent resin film from a photoreceptor film. Even if only the partial _ ================================================================================================= It is also a polarizing plate which is polarized in this way, and can be an optical resin film such as an optical force. It is also known as the use of adhesive bonding. K: It is necessary to make a liquid crystal sand with other optical functional layers. The liquid crystal sand is assembled on the μ unit substrate. For the liquid crystal display device, it is used as a thin display for personal computers.昼,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, Here, the polarizing plate is usually attached with an adhesive; the member is also made thinner. Some defects occur after the above bonding; on the liquid crystal cell, this is because it can be easily peeled off from the liquid crystal cell s 322473 201121794 in January/brother, and it is convenient to fit another polarizing plate. However, in general, in order to maintain an appropriate adhesive force, a thickness of about 20/m is required, which is a bottleneck in the liquid crystal panel and the liquid crystal display device. It is attempted to reduce the thickness of the liquid crystal cell side protective layer by omitting the polarizing film, directly forming an adhesive layer thereon, and bonding the adhesive layer to the liquid crystal cell. However, the adhesive layer is directly bonded thereto. In the case where the polarizing film and the liquid crystal cell are subjected to a heat-resistant test exposed to a high temperature, the shrinkage of the polarizing film may not be sufficiently absorbed by the adhesive layer alone, and bulging and peeling may occur between the polarizing film and the adhesive layer. In addition, in the case of performing a thermal shock (shock test) in a high temperature state and a low temperature state, there is a possibility that the adhesive film may not sufficiently absorb the stretching and contraction of the polarizing film, resulting in expansion and contraction of the polarizing film. The polarizing film is ruptured. As a further attempt to reduce the thickness of the polarizing plate, for example, Japanese Patent Laid-Open No. 4306269 (JP-A-2004-245924) The technique is to apply an uncured epoxy resin composition to at least one surface of a polarizing film in which a dichroic dye is adsorbed and oriented by a polyvinyl alcohol-based resin, and then cure the composition to form a protective film. However, in the state in which the polarizing plate having the cured product of the epoxy resin composition as the protective film is bonded to the liquid crystal cell by the adhesive layer, durability is insufficient, for example, in the case of performing a thermal shock test, sometimes In addition, the technique disclosed in Japanese Patent No. 4,306,270 (JP-A-2004-245925) discloses a polarization in which a dichroic dye is adsorbed and oriented in a polyvinyl alcohol-based resin. On the film, a protective film is bonded to an adhesive which is composed of a composition of a main component of 322473 5 201121794, which is an epoxy resin-free epoxy resin, to form a polarizing plate. On the other hand, Japanese Patent No. 3695484 (Japan) Japanese Laid-Open Patent Publication No. Hei 9 159828 discloses a technique in which a bonding layer made of a photocurable adhesive is formed on one surface of a polarizing film to form a polarizing plate with an adhesive layer. The layer is followed by a polarizing plate on the liquid crystal cell substrate, wherein the photocurable adhesive is separately prepared with respect to the terpolymer of ethylene, acrylate or mercapto propylene monomer and maleic acid or maleic anhydride. A photosensitive agent such as a ruthenium and an unsaturated compound such as an acryloxy group-containing compound are also described. It is also described that a protective layer composed of the photocurable adhesive is provided on the other surface of the polarizing film. In the case of using the adhesive disclosed in the document to cause the polarizing plate to be on the liquid helium unit substrate, in the heat resistance test or the thermal shock test, no large problem was found in the liquid crystal cell of the J 1 size. However, when it is used as a liquid crystal cell of a large size to a large size, there is a problem that the polarizing plate is peeled off from the surface of the liquid crystal cell substrate or the polarizing film is broken. In addition, the optical layered body obtained by bonding the polarizing plate to the liquid crystal cell substrate can be thinned. However, it is not possible to easily bond it to the liquid crystal cell 2 polarizing plate. Stripped. For this reason, in the case of the inspection machine after the fitting, the situation is as follows: 'If there is no special economy, the liquid crystal unit is lacking, and the Japanese Patent No. 891 (Japanese Patent No. 296) A technique for imparting a polarizing plate and α on a liquid crystal cell substrate by an adhesive is disclosed. , 6 s 322473 201121794 [Summary of the Invention] For the second =: in the 'by using a specific adhesive to stick the polarizing plate, ^ liquid crystal cell substrate as a representative example of the glass flanks', a thin type of lightweight The optical lamination stacking which is excellent in durability and the object of the present invention is to provide advantageous manufacturing. The present invention includes the following invention. The η [丨] kind of optical laminate is obtained by laminating a glass plate and a plastic film material by an adhesive layer. The adhesive layer is formed of an adhesive composition containing a polyethylene glycol. The optical layered body according to [1], wherein the adhesive composition forming the adhesive layer further contains ♦ a silking agent. This embodiment is a preferred embodiment. [3] The optical layered body according to [1], wherein the adhesive composition further contains a crosslinking agent. [4] The optical layered body according to any one of [1], wherein the adhesive layer has a thickness of 5/zm or less. This embodiment is suitable for thinning of the optical laminate. [5] The optical layered body according to any one of [1] to [4] wherein the glass plate is a liquid crystal cell substrate. The optical layered body according to any one of the above aspects, wherein the plastic sheet has a dichroic dye adsorbed on the polyvinyl alcohol resin and oriented. The polarizing plate of the polarizing film. [7] The optical layered body according to [6], wherein the polarizing plate has a polarizing film and a transparent protective layer formed on at least one side. [8] The optical layered body according to [7], wherein the polarizing plate is provided with the polarizing film and a transparent protective layer formed on one surface, and the polarizing layer is opposite to the transparent protective layer The ride is then directly applied to the liquid Ba unit substrate. This embodiment is a preferred embodiment. [9] The optical layered body according to [7], wherein the polarizing plate is provided with the polarizing film, a transparent protective layer formed on the surface thereof, and laminated on the other side of the polarizing film In the phase difference plate of ±, the phase difference plate side is bonded to the liquid crystal cell substrate by the adhesive layer. This embodiment is a preferred embodiment. 〇 〇 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 a layer of an adhesive composition composed of an aqueous solution containing a polyvinyl alcohol-based resin is provided on at least the surface of the bonding surfaces; and a laminate is adhered to the glass sheet and the substrate by the adhesive composition layer The plastic sheet; the inspection process, inspecting the laminate obtained in the above-mentioned δ process, removing the defective product from the production line: and the IU process, so that the inspection process is not detected The layer of the adhesive composition present in the defective laminate is cured. The method for producing an optical layered body according to the above aspect, wherein the glass sheet is a liquid crystal cell substrate, and the plastic sheet has a dichroic dye adsorbed on the polyethylene resin. The polarizing plate β of the polarizing film which is oriented, [12] The method for producing an optical layered body according to [1] or [11], 8 322473 201121794 For the inspection process, After peeling off, the glass plate is returned to the description and then the contact layer forming process material. For the optical layered body of the present invention, the plastic sheet is bonded to the glass plate, so that == direct and glass plate and plastic sheet The adhesion of the material is also good. In particular, when the liquid crystal single substrate is a glass plate and the polarizing plate is a plastic sheet, the thickness can be reduced as compared with the conventional optical laminate in which the polarizing plate is bonded to the liquid crystal cell substrate. The optical layered body and the liquid crystal panel are made thinner and lighter, and the adhesion between the polarizing plate and the liquid crystal cell substrate is also good. Further, by using an adhesive instead of an adhesive in the bonding of the liquid crystal cell substrate and the polarizing plate, it is possible to provide an optical laminated body which can sufficiently withstand the environmental conditions at the time of device assembly or the use of the device. Further, according to the method of the present invention, it is possible to facilitate the production of the above optical laminate. In particular, after the bonding process and before the curing process, an inspection process is provided, and when a surface damage, a foreign matter, a bubble, or a shaft offset is detected, the defect is detected. It is removed from the production line, so that the optical laminate can be manufactured with good yield. Further, in the case of bonding a glass plate represented by a liquid crystal substrate and a plastic sheet represented by a polarizing plate, an adhesive composition composed of an aqueous solution is used as long as it can be easily used before the curing process. Peel off the plastic sheet from the glass. Therefore, in the case where the plastic sheet is peeled off from the laminate which is removed from the production line in the above-mentioned inspection process, a simple process such as washing the adhesive composition by washing with water can be returned to the subsequent process. Since the agent composition layer forming step is performed, the productivity of the optical laminate can be further improved. [Embodiment] In the present invention, as shown in the cross-sectional view of Fig. 1, a representative glass sheet 1 as a liquid crystal cell substrate and a representative plastic sheet 3 as a polarizing plate are bonded together by an adhesive layer 2, An optical layered body 1 was produced. The agent layer 2 is then formed of an adhesive composition containing a polyethylene glycol resin. First, the adhesive composition and the adhesive layer 2 formed therefrom will be described, and then, the order of the glass plate 1 and the plastic sheet 3 will be described. [Adhesive composition] <Polyvinyl alcohol-based resin> In the present invention, in order to adhere the glass sheet 1 and the plastic sheet 3, an adhesive composition containing a polyvinyl alcohol-based resin is used. This adhesive composition is usually used in the form of an aqueous solution. In the field of a polarizing plate, an aqueous solution of a polyvinyl alcohol-based resin is conventionally used for a polarizing film composed of a polyvinyl alcohol-based resin and a tris-vein film laminated on at least one surface thereof. The transparent protective film of the example of the present invention has been found to exhibit a high adhesion force when used in the case of a returning sheet which is exemplified by a polarizing plate and a glass plate which is a representative example of a liquid crystal cell substrate. The polyvinyl alcohol-based resin which is a main component of the adhesive composition can be obtained by subjecting a polyacetate resin to four. As the polyacetate resin, a copolymer of acetic acid B and other monomers which can be used as a homopolymer of vinyl acetate vinegar can be used. The other monomer copolymerizable with vinyl acetate may, for example, be an unsaturated neon, an unsaturated deuterium, a dilute (tetra), a vinyl lysate, or a propylene amide having an ammonium group of 322473 10 201121794. The polyvinyl alcohol-based resin contained in such an adhesive composition preferably has a suitable degree of polymerization, for example, when the aqueous solution having a wave width of 4% by weight is formed, the viscosity is preferably in the range of 4 to 50 mPa·sec. 'More preferably in the range of 6 to 3 〇 mPa · sec. The degree of saponification of the polyvinyl alcohol-based resin contained in the adhesive composition is not particularly limited, and is generally preferably 8 〇 mol% or more, more preferably 9 莫 mol% or more. When the degree of saponification of the polyvinyl alcohol-based resin contained in the adhesive composition is low, the water resistance of the adhesive layer 2 may be insufficient, and the polyvinyl alcohol-based resin contained in the adhesive composition is preferably modified. Resin. Examples of such a modified polyvinyl alcohol-based resin include an ethylene acetylated group-modified polyvinyl alcohol-based resin, an anion-modified polyvinyl alcohol-based resin, and a cationically modified polyvinyl alcohol-based resin. Resin. When such a modified polyvinyl alcohol-based resin is used, it has an advantage of improving the water resistance of the adhesive layer, which is preferable. The ethyl acetonitrile-modified polyvinyl alcohol-based resin may have an ethyl acetonitrile group (CH3C0CH2C0-) in addition to the hydroxyl group constituting the polyvinyl alcohol skeleton, and may have other groups such as acetamidine. Base. This acetamidine group exists in a state in which a hydrogen atom of a typical hydroxyl group is substituted. The ethyl acetonitrile-modified polyvinyl alcohol-based resin can be produced, for example, by a method in which polyvinyl alcohol is reacted with diketene. Since the ethyl ethoxylated modified polyvinyl alcohol-based resin has a highly reactive functional group, that is, an ethyl oxime group, it is preferable in terms of improving the durability of the adhesive layer 2. Further, when the curing of the adhesive composition is carried out by an active energy ray, it is preferable to use an ethyl acetonitrile-modified polyvinyl alcohol-based resin from the viewpoint of excellent curability. The content of the ethyl acetamidine group in the ethyl acetate-modified polyvinyl alcohol-based resin is not particularly limited as long as it is 0.1 mol% or more. The content of the ethyl sulfonyl group referred to herein is the total amount of the ethyl hydrazide group relative to the hydroxyl group, the ethyl hydrazide group, and the other ester group (ethyl fluorenyl group) in the polyethylene resin. The molar fraction is expressed by the value of %, which is sometimes referred to as "the degree of acetylation. When the degree of acetylation in the polyvinyl alcohol-based resin is less than 0.1 mol%, the adhesive layer is improved. The effect of water resistance is not necessarily sufficient. The degree of acetylation in the polyvinyl alcohol-based resin is preferably from about 1 to about mol%, more preferably from 1 to 20 mol%, and particularly preferably from 2 to 5%. 7 mol%. When the degree of acetylation exceeds 40 mol%, the effect of improving water resistance becomes small. For an anion-modified polyvinyl alcohol-based resin, in addition to the hydroxyl group constituting the polyvinyl alcohol skeleton, An anionic group, typically a carboxyl group (_c〇〇H) or a salt thereof, may also contain other groups such as an ethenyl group, etc. The anion-modified polyvinyl alcohol-based resin may be used, for example, to have an anionic property. Method for copolymerizing an unsaturated monomer of a group (typically a carboxyl group) with vinyl acetate, followed by saponification On the other hand, for the cationically modified polyvinyl alcohol-based resin, in addition to the hydroxyl group constituting the polyvinyl alcohol skeleton, a cationic I1 group, typically a secondary amine group or a fourth-order group, is also contained. A group other than this may be contained, for example, an ethyl fluorenyl group, etc. The cation-modified polyvinyl alcohol-based resin ruthenium may be used, for example, to make an unsaturated single having a cationic group (typically a tertiary amino group or a quaternary ammonium group) The composition of the present invention is copolymerized with vinyl acetate and then saponified. The adhesive composition used in the present invention may of course contain two or more kinds of the modified polyvinyl alcohol-based resin of 12,322,473, 2011,21,794, and may also contain unmodified a polyvinyl alcohol-based tree sap (specifically, a completely saponified or partially saponified product of polyvinyl acetate) and the above-mentioned modified polyvinyl alcohol-based resin. The adhesive composition for forming an optical laminate may be A commercially available suitable polyvinyl alcohol-based resin is used. Specifically, for example, it is sold as a polyethyl alcohol having a saponification degree of saponification. PVA-117H", Gohsenol NH-2G sold by Japan Synthetic Chemical Industry Co., Ltd.; as a modified ethylene glycol based on ethyl acetate, from Japan Synthetic Chemical Industry Co., Ltd. (4) "G〇hsefimerZ , series; "KL Weng and "KM-118" publicly sold by Japan Kuraray (8) as an anion-modified polyethyl alcohol, "Gohse-T," sold by the Japanese synthetic chemical industry (shares) company; "CM_318, sold by Japan's Into Chemical Industry Co., Ltd. as a cationically modified alcohol, "4" "G〇hsefimer K2i〇", etc. = Polyethylene in the composition of the agent The concentration of the resin is not particularly limited, and when used in the form of an aqueous solution, it is preferably from i to 2Q parts by weight, more preferably to parts by weight, even more preferably from 1 to 10 parts by weight of the hydrovinyl alcohol-based resin. 1G parts by weight, particularly preferably 3 to Π) Weight phase 1 in 100 parts by weight of water, the concentration of the polyvinyl alcohol-based resin is less than 1% (4) 'Silk can easily reduce the material property, and when the pot concentration is too large, 'It may be easy The optical characteristics of the obtained optical layered body were lowered. In the adhesive composition, (4) water may be pure water, ultrapure water, self-water or the like, and is not particularly limited, but from the viewpoint of maintaining the uniformity and transparency of the formed adhesive layer, it is preferably Pure or ultrapure water. Further, 322473 13 201121794 It is also possible to add an alcohol such as methanol or ethanol to the aqueous solution of the adhesive. <Other components constituting the adhesive composition> In the adhesive composition for forming the adhesive layer 2 in the present invention, in order to improve the adhesion between the adhesive layer and the glass plate, a decane coupling agent is preferably contained, and particularly preferably In the aqueous solution containing a polyvinyl alcohol-based resin, a simmering agent is prepared in advance. The decane coupling agent is a compound in which a hydrolyzable group such as an alkoxy group is bonded to a ruthenium atom and is bonded with, for example, an amine group, an epoxy group, a (meth) acryl fluorenyl group, An organic group of a reactive functional group such as a vinyl group, an yl group or a fluorenyl group. Specific examples thereof include vinyl trimethoxy sulphur, ethidium triethoxy sulphur, ethyronyl (2- methoxy ethoxy), and N-(2) -Aminoethyl)-3-aminopropyl-decyldimethoxy oxanthine, N-(2-aminoethyl)-3-aminopropyltrimethoxyacetate, 3-aminopropyl Trimethoxy decane, 3-aminopropyltriethoxy decane, 3-glycidoxypropyltrimethoxy decane, 3-glycidoxypropyltriethoxydecane, 3- Glycidoxypropyl decyl dimethoxy decane, 3-glycidoxy propyl ethoxy dimethyl decane, 2-(3,4-epoxycyclohexyl)ethyltridecyloxy Decane, 3-chloropropyl-decyldimethoxydecane, 3-chloropropyltrimethoxyoxymethane, 3-mercaptopropene, methoxypropyltrimethoxymethane, 3-sulfopropyl Trimethoxy decane and the like. Two or more kinds of decane coupling agents may be used in combination. Among them, a decane coupling agent having an epoxy group, an amine group or a mercapto group, preferably a 3-ring, is preferred, if considering the solubility in water or the pot life (pot life) as an adhesive. Oxypropoxypropyl tridecyloxy oxime, N_(2-aminoethyl)-3-aminopropyltrimethoxyacetate, 3-aminopropyl

S 14 322473 201121794 s-trimethoxy decane, 3-mercaptopropyl A^-yltrimethoxy decane, and the like. The Shixi burning coupling agent may be a polycrystalline sand preparation y e w ^ ^ oxygen oligomer type. When the polyoxynene oligomer is represented by h of the (monomer)-(trans) copolymer, for example, the following calcining coupling agent can be mentioned. 3-Wilyl dimethoxy group, tetramethoxy mechanical copolymer, 3_Wilyl trimethoxy Wei-tetraethoxy% silk, 3_ base triethoxy stone Xi Xuan-tetramethoxy a copolymer of a hetero-copolymer, a ketone, a ketone, a ketone, a ketone, a ketone, a ketone, a ketone, a ketone, a ketone, a ketone a copolymer containing a fluorenyl group such as a tetraethoxy decane copolymer, a mercaptotriethoxydecane-tetramethoxydecane copolymer and a mercaptotriethoxydecane-tetraethoxyanthracene copolymer ; 3-methyl propylene methoxy propyl trimethoxy decane _ tetramethoxy decane total ^ 3, 3-methyl propyl oxypropyl trimethoxy dream _ tetraethoxy xixi , 3-methylpropenyloxypropyltriethoxy-Xi-Xing-Tetra-oxyxanthene copolymer, 3-mercaptopropenyloxypropyltriethoxycure-tetraethoxylate Xishao Copolymer, 3-mercaptopropenyloxypropylsulfonyldimethoxycarbazide-tetramethoxydecane copolymer, 3-mercaptopropenyloxypropyl-decyldimethoxydecane -tetraethoxy decane copolymer , 3-methacryloxypropyl propyl methyl diethoxy decane-tetramethoxy decane copolymer and 3-methyl propylene methoxy propyl decyl diethoxy decane - tetraethoxy decane a copolymer containing a mercapto propylene methoxy propyl group such as a copolymer; 3 propylene methoxy propyl trimethoxy decane-tetradecyl decane copolymer, propylene methoxy propyl trimethoxy decane - Tetraethoxydecane copolymerization 15 322473 201121794, 3 - propylene oxypropyl triethoxy calcination - tetramethoxy catalyzed copolymer, 3-propenyloxypropyl triethoxy decane - Tetraethoxydecane copolymer, 3-propenylmethoxypropylmethyldimethoxydecane-tetramethoxydecane copolymer, 3-propenyloxypropyl-decyldimethoxydecane-tetraethyl Oxydecane copolymer, 3-propenylmethoxypropyl decyl diethoxy decane-tetradecyloxydecane copolymer and 3-propenylmethoxypropyl decyl diethoxy decane-tetraethoxy Acrylate-containing propyl-containing copolymer such as decane copolymer; ethylene-trimethoxyoxyl _tetradecyloxy-calcined copolymer, ethylenetrimethoxydecane-tetraethoxy Alkyne copolymer, vinyltriethoxydecane-tetradecyloxydecane copolymer, vinyltriethoxydecane-tetraethoxydecane copolymer, vinylmethyldimethoxydecane-tetramethoxy a decane copolymer, a vinyl decyl decyl decane-tetraethoxy decane copolymer, a vinyl fluorenyl diethoxy decane-tetradecyl decane copolymer, and a vinyl fluorenyl diethoxy decane - a vinyl group-containing copolymer such as a tetraethoxysilane copolymer; a 3-aminopropyltrimethoxy decane-tetradecyloxydecane copolymer, 3-aminopropyltrimethoxy ethoxy- Tetraethoxymolecular copolymer, 3-aminopropyltriethoxydecane-tetradecyloxydecane copolymer, 3-aminopropyltriethoxydecane-tetraethoxydecane copolymer, 3 -Aminopropyl decyl decyloxydecane-tetradecyloxydecane copolymer, 3-aminopropyl decyl decyloxydecane-tetraethoxy decane copolymer, 3-aminopropyl hydrazine An amine group-containing copolymer such as a bis ethoxy decane-tetramethoxy decane copolymer and a 3-aminopropyl decyl diethoxy decane-tetraethoxy decane copolymer. Since these decane coupling agents are often liquid, they can be directly mixed in an aqueous solution containing a polyvinyl alcohol-based resin.至30.30至30重量的优选为0. 03至30。 The amount of 0. 01 to 50 parts by weight, preferably 0.03 to 30 parts by weight of the polyvinyl alcohol-based resin. The proportion by weight is used. When the amount of the decane coupling agent is 0.01 parts by weight or more, particularly 0.03 parts by weight or more, the adhesion between the adhesive layer and the glass plate is improved, so that it is preferably used. . Further, when the amount is 50 parts by weight or less, particularly 30 parts by weight or less, it is preferable because the tendency of the Shi Xixuan composition to bleed out from the adhesive layer is suppressed. The adhesive composition for forming the adhesive layer 2 in the present invention may contain a crosslinking agent. The crosslinking agent may be formulated in an aqueous solution of a polyvinyl alcohol-based resin containing no decane coupling agent, or may be formulated in an aqueous solution of a polyvinyl alcohol-based resin together with a decane coupling agent, and usually preferably contains a decane coupling agent and a crosslinking agent. Both. The crosslinking agent may be a compound having a functional group reactive with a polyvinyl alcohol-based resin, and a crosslinking agent used in a conventional polyvinyl alcohol-based adhesive can be used without particular limitation. The compound which can be a crosslinking agent is distinguished by a functional group, for example, an isocyanate compound having at least two isocyanato groups (-NCO) in the molecule; at least two epoxy groups in the molecule (bridged-0-) Epoxy compound; monoaldehyde or dialdehyde; organotitanium compound; inorganic salt of divalent or trivalent metal such as magnesium, calcium, iron, nickel, zinc and aluminum; metal salt of glyoxylic acid; Melamine and the like. Specific examples of the isocyanate compound to be a crosslinking agent include anthene diphenyl diisocyanate, hydrogenated phthalic acid diisocyanate, an adduct of trishydroxypropyl propane and toluene diisocyanate, diphenylnonane diisocyanate, and the like. Phenylene oxide triisocyanate, isophorone diisocyanate, ketoxime capping or phenol capping of these isocyanate 17 322473 201121794 compound. Specific examples of the epoxy compound to be a crosslinking agent include ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, glycerin diglycidyl ether, and glycerol triglycidyl ether. 1,6-hexanediol diglycidyl ether, trimethylolpropane triglycidyl ether, diglycidylaniline, diglycidylamine, a reactant for polyalkylene polyamine and a dicarboxylic acid A water-soluble polyamine epoxy resin obtained by reacting a guanamine polyamine with a surface gas alcohol. Specific examples of the monoaldehyde to be a crosslinking agent include furfural, acetaldehyde, propionaldehyde, butyraldehyde, and the like. Specific examples of the dialdehyde include glyoxal, malondialdehyde, and dibutyl. Aldehyde, glutaraldehyde, malealdehyde, phthalaldehyde, and the like. For the organic titanium compound to be a crosslinking agent, various organic drinking compounds are sold by Matsumoto Fine Chemical Co., Ltd., Japan. By the company's organic titanium compound webpage (Internet &lt;1] this: 111^0://^\^.111- chem. co. jp/products/ productsl. html&gt;, September 6, 2010 曰In the case of the water-soluble organic titanium compound to which the present invention is applied, the following organic titanium compound is listed in the order of the formula of the compound, the chemical name of the company, and the trade name of the company. [(CH3)2CH0]2Ti[0CH2CMf(CH2CH20H)2]2: The company's chemical name is "bis(triethanolamine) diisopropyl titanate", the company's trade name "Orgatics TC-400", (H0)2Ti[0CH(CH3)C0(TMNH4+)2: The company's chemical name is "Titanium lactate", the company's trade name "Orgatics TC-300", (HO)2Ti[OCH(CH3 ) COOH] 2: The company's chemical name is "milk 18 322473 201121794 yin, the company's trade name "〇rgatics TC-310" and "Orgatics TC-315". In addition, 'metal acetate acid salt is better. Examples of the alkali metal salt or the alkaline earth metal salt include sodium glyoxylate, potassium glyoxylate, magnesium acetate, calcium citrate, etc. Among these crosslinking agents, the above-mentioned water-soluble polyamine ring is suitably used. Oxygen tree ruthenium represented by epoxy compound or aldehyde, methylol melamine, alkali metal or alkaline earth metal salt of glyoxylic acid, etc. For the crosslinking agent, it is preferably combined with a polyvinyl alcohol resin. Dissolved in water to form an adhesive composition. As follows, due to cross-linking in the aqueous solution, the amount can be only a small amount 'so as long as it is Water having a solubility of, for example, at least about i.i can be used as a crosslinking agent. Of course, a compound having a degree of water solubility comparable to that of water is more suitable as a crosslinking agent for use in the present invention. The amount of the (four) agent to be blended may be usually about 5, preferably 1 to 5 g by weight, based on the type of the polyvinyl alcohol-based resin == with respect to the weight of the polyethylene-based resin. The blending of the parent binder can provide the durability of the primer layer, and it is preferably as described above. When the ratio is 10 to 50 parts by weight, the ratio of the crosslinking agent becomes too short, the crosslinking agent reaction becomes very short in a short period of time, and it is unsuitable, and the product is saponified in advance, and the results are applicable and used. 201121794 In the adhesive composition, a conventionally known suitable additive such as a plasticizer, an antistatic agent, or fine particles can be blended in a mold which does not impair the effects of the present invention. [Adhesive layer] In the present invention, 'in a glass plate 1 and at least one of the bonding faces of the plastic sheet 3 On one surface, a layer composed of an adhesive composition composed of the above-described adhesive composition, preferably an aqueous solution containing the above components, is provided, and a layer of the adhesive composition is bonded to the glass plate i and the plastic sheet. 3. The layer is hardened to form the adhesive layer 2. The thickness of the adhesive layer 2 can be set to 5 "m or less, usually about 至·〇01 to 5 μm, preferably 〇〇1 to 2 in m, more preferably 0.05. To the extent that the thickness of the adhesive layer exceeds that of the field, the appearance of the plastic sheet 3 may be poor. [Glass Plate] For the glass plate 1 to which the plastic sheet 3 is bonded by the adhesive layer 2, various glasses generally called glass can be used. As described above, when the glass plate 1 is a liquid crystal cell substrate constituting a liquid crystal display device, the present invention particularly has a liquid crystal 21 liquid crystal cell formed between a liquid crystal cell substrate and a further substrate, and is a core of the liquid crystal display device. member. The glass constituting the liquid or the plate may be various kinds of glass, which are generally known as sodium 35 glass, low boron glass, and glass, and the liquid crystal unit is preferably an alkali-free glass. [Plastic sheet] Mouth (4) = plastic sheet 3 attached to glass plate 1, 4 树 疋 322 473 473 321 323 323 323 323 323 323 The mirror for the face. As a water-soluble solution using a polyvinyl alcohol-based resin; a resin == a resin, which includes a cellulose or a diacetic cellulose or a cellulose acetate propionate containing a scorpion A cellulose acetate resin cast by a cellulose acetate butyric acid fiber is a fine resin represented by a polypropylene resin. The present invention has a high adhesion force. The present invention exhibits a high adhesion force. The present invention exhibits a high adhesion force. Alternatively, the surface of the plastic sheet 3 bonded to the glass sheet i may be subjected to a subsequent treatment such as a chemical treatment or a corona discharge treatment, and then applied to the formation of the adhesive layer and the glass plate i _ Hehe. For example, when the cellulose acetate-based resin is bonded to the glass sheet i, the adhesion force formed by the aqueous solution of the poly-b-lipid can be further increased by performing the treatment on the surface. In addition, even when the chain olefin resin represented by the polypropylene resin and the chain olefin resin represented by the polypropylene resin are bonded to the glass plate 1, the surface is subjected to an easy subsequent treatment such as corona discharge treatment. The strong adhesion force formed by the aqueous solution of the polyethylene resin can be exhibited. For the thickness of the plastic sheet 3, as long as it can be attached to the glass plate! The upper state is not particularly limited, and it is preferably supplied to the glass sheet 1 in a state in which the curl is reduced. Therefore, when flexibility or the like is also considered, it is usually preferably 500 / zm or less, and further preferably. It is 3 〇〇, the following, especially 2 〇〇V m or less. <Polarizing Plate> 21 322473 201121794 As described above, in the optical layered body of the present invention, the glass plate 1 is a liquid crystal cell substrate, and the plastic resin is adsorbed to the dichroic dye in the first embodiment; (4) In the case of 24 vinyl plates, 'particularly useful. It is also possible to monopolize the polarization of 20% of the polarized germanium into the plastic sheet 3, but since the polarizing film of the polarizing film is preferably used in the pot 5 + a, it is fragile when used alone. Therefore, it is used: A polarizing plate having a transparent protective layer on at least one side thereof, in particular, a surface bonded to the liquid crystal side. The second meaning of the state is: the layer formed by the layer of the optical layered body is a shape of a layer of moon layer 7 ^ S, and a transparent edge layer 7 is provided on one side of the polarization layer 6 to form a polarizing plate 5, and the opposite side is biased. On the surface substrate 1 of 7, the 2 is directly bonded to the liquid crystal cell body n, and the stereoscopic U is applied. In other words, in the optical layering of Fig. 2, the polarizing film 6 is laminated in contact with the slab 1 adhesive layer 2, and the transparent protective layer 7 is laminated on the surface of the polarizing film 6 opposite to the agent layer 2. The cross-sectional schematic view is ημ η ^ of another layer of the Γ, _ body, and a suitable resin layer 8 is provided on the other surface of the transparent film φ on one side of the polarizing film δ. The adhesive layer 2 is adhered to the liquid crystal cell raft 1 by the adhesive layer 8 on the side of the first layer 1 to constitute the optical layered body 12. In the case of the polarizing plate 1, as long as it includes the polarizing film 6, it is possible to have any layer in the form of a film, and it is considered from the viewpoint of protecting the polarizing film 6 while making the optical S, other than the polarizing film 6. Layer, m ? ^, especially good for 1 or 2 layers. From such a viewpoint, the transparent protective layer 7 is provided on one side of the polarizing plate 6, and the polyvinyl alcohol resin film surface (polarizing film surface) on the opposite side to the transparent protective layer 7 of 22 322473 1 201121794 is used. The form in which the agent layer 2 is directly bonded to the liquid crystal cell substrate is one of preferable embodiments. When the form as shown in Fig. 2 is employed, the thickness of the polarizing plate 5 can be set to, for example, 1 〇〇//m or less depending on the type of the transparent protective layer 7. <Polarizing Film> The polarizing film 6 constituting the polarizing plate 5 is obtained by adsorbing and orienting a monochromatic dye on a polyvinyl alcohol-based resin. More specifically, it is preferred to use a polyvinyl alcohol-based resin film which is uniaxially stretched to adsorb a dichroic dye. Made of cockroaches. , ,,疋. The polyvinyl alcohol-based resin which constitutes the adhesive composition described above is the same as the polyvinyl alcohol-based resin which can be obtained by saponifying a polyvinyl acetate-based resin. As a polyacetate of vinyl acetate vinegar, which is a vinyl acetate homopolymer, it can be used as a copolymer of other monomers which can be copolymerized with other monomers. Other monomers to be copolymerized include, for example, a saturated acid, a rare hydrocarbon, an ethylene group, and the like: no, usually about 85% by mole, preferably = % of the resin. The polyvinyl alcohol-based resin constituting the polarizing film can also be incorporated into the moiré, and can be differentiated (four) secretly (four). Further, the polyethylene having a degree of polyethylene of the polarizing film is usually from about 1 to about 1 Å, preferably in a simple form, and = is formed by forming a polyvinyl alcohol-based resin. A film of a polarizing film. The polyvinyl alcohol-based resin is made into a (four)° to be used as 322473 23 201121794 Π:: a coloring pigment dyed to absorb the dichroic dye, and the coloring hue of the polyethylene spurs shaft film (4) acid water soluble for 0 The step of washing with water after treatment with a boric acid aqueous solution. In the case of the early stretching, the dyeing can be carried out in the dichroic dye. Ding' can also be carried out simultaneously with dyeing. 'It can also be carried out after dyeing. The uniaxial stretching is carried out after dyeing the pigment. The axial stretching can be carried out before the boric acid treatment, or in the simple axis. Stretched. It is also possible to perform a single row stretching in a plurality of stages of these operations, and also to stretch in the uniaxial air between the rolls having different rotational speeds and the early axis of the roll. Further, it may be a dry stretching which is stretched in a state of expansion 3, or may be a wet stretching which is stretched by a solvent in a solvent. The draw ratio is usually from 3 to 8 by using a dichroic dye to impregnate a polyvinyl alcohol-based resin film dye with a dichroic organic dye t il as a dichroic dye. It is possible to use moth and dichroic treatment hi, and it is preferable to perform the impregnation treatment in water in the case of dyeing. When iodine and iodine are used as the dichroic dye, it is usually carried out by a method of impregnating the polyethylene (tetra) resin film in an aqueous solution containing and discharging.

S 322473 201121794 Dyeing. 0.01 to 0.5 parts by weight of the left side in the aqueous solution, and the amount of 3 is usually 0.5 parts by weight with respect to 100 parts by weight of water. Further, the content of oxime is usually about 2 G to about 2 parts by weight with respect to the temperature of water 100. The time (staining_) of the aqueous solution used for dyeing is passed, and the immersion in the aqueous solution is another, about C, about 300 seconds. In this case, the organic dye of the dichroic dye is usually used as an aqueous solution of the dichroic dye to impregnate the dichroic:: resin oxime in an aqueous solution of a water-soluble dichroic organic dye. The dye is usually in the form of a bd〇-3 to lxl0 dye in an amount of about 100 parts by weight of sodium persulfate. The aqueous dye solution may also contain a 20 δ Marshalling Aid. The temperature of the dye aqueous solution is usually "about 匕 匕 , , , , , , , , , , 通常 , , , , , , , , , , , , , , , , , , , , , , , , , , , 染料 染料 染料 染料 染料 染料 染料 染料The polyvinyl alcohol strip 44a h after the wood color is impregnated in the boric acid-containing aqueous solution. The boric acid content of the boric acid-containing aqueous solution in which the A 0 τ is added is usually used up to 15 parts by weight with respect to 100 parts by weight of water. It is about 5.2 parts by weight, and it is preferably about 5 12 parts by weight. In the case of "color", the boric acid-containing water is smelted with potassium telluride. This is the case of potassium iodide in a boric acid-containing aqueous solution. Content of the phase 15: water 100 parts by weight is usually about 2 to 20 parts by weight, preferably about 5 to parts by weight. The impregnation time in the aqueous solution containing boric acid is usually from about 1 to about 1200 seconds, preferably 150. It is about 600 seconds, more preferably about 200 400 seconds. The temperature of the aqueous solution containing citric acid is usually 50. (: Above, preferably 5 to 85 ° C. 25 322473 201121794

The polyvinyl alcohol-based resin film after the boric acid treatment is usually subjected to a water washing treatment. The water washing treatment is carried out by, for example, immersing a boric acid-treated polyvinyl alcohol-based resin film in water. The temperature of the water in the water washing treatment is usually about 5 to 40 C, and the time of the crushing is about 2 to 120 seconds. After washing with water, drying treatment was carried out to obtain a polarizing film. The drying treatment can be carried out using a hot air dryer or a far infrared ray heat. The dry temperature is usually from about 4 〇〇 to about 10 °C. The drying time is usually about 120 to 600 seconds. L

According to the above aspect, a polarizing film obtained by adsorbing and orienting a dichroic dye in a uniaxially stretched polyvinyl alcohol-based tree raft film can be obtained. The thickness of the obtained partial selective film can be set to about 5 to 40/zm. X <Transparent protective layer> The transparent protective layer 7 provided on at least one side of the polarizing film 6 is, for example, a cellulose acetate resin, a cycloolefin resin, or a chain olefin resin represented by a polypropylene resin. An acrylic resin, a polyamidene resin, and a polycarbonate-based tree represented by polymethyl phthalate resin, such as polyethylene terephthalate resin, etc. A suitable thermoplastic film which has been widely used as a material for forming a protective layer in the field of ruthenium. Further, the transparent protective film 7 may be composed of a cured product of the active energy ray-curable resin composition. From the viewpoints of mass productivity and adhesion, it is preferable to use a ruthenium or active energy ray including a cellulose acetate resin, a cyclic hydrocarbon resin, a chain olefin resin, an acrylic resin or a polyester resin. A cured product of the curable resin composition is used as the transparent protective layer 7. When the transparent protective layer 7 is formed of a thermoplastic resin film, the thickness 322473 26 201121794 is usually about 10 to 80 / / m, preferably a relatively thin layer of about 1 〇 to 5 〇 #m. On the other hand, when the cured product of the active energy ray-curable resin composition constitutes the transparent protective layer 7, the thickness thereof can be set to 10 V m or less, for example, about 1 to 10 // m. The cellulose acetate-based resin film used as the transparent protective layer 7 is a film formed of a part or all of the acetate of the cellulose, and examples thereof include a triacetyl cellulose film and a diethyl cellulose film. As such a cellulose acetate-based resin film, a suitable commercial product can be used, for example, "Fujitac TD80", "pujitac TD80UF" and "Fujitac TD80UZ" sold by Fujifilm Co., Ltd.; by Konica Minolta ( "KC8UX2M" and "KC8UY" (both trade names) sold by the company. The cycloolefin resin used in the transparent protective layer 7 has, for example, norbornene and tetracyclododecene (alias: dimethyl bridge) a thermoplastic resin (also referred to as a thermoplastic cyclic hydrocarbon resin) of a monomer unit of a cyclic olefin (cycloalkene) such as octahydronaphthalene or a derivative thereof. The ringtone resin may be the above-mentioned ring-dilute hydrocarbon The addition of a hydride of a % polymer or a halide of a ring-opening copolymer of two or more kinds of cycloaliphatic hydrocarbons may be an addition of a cycloaliphatic hydrocarbon, a chain olefin, and/or an aromatic compound having a vinyl group. a copolymer. A polar group can be introduced into the cycloolefin resin. When a transparent copolymer layer 7 is formed using an addition copolymer of a cyclic olefin and a chain olefin and/or an aromatic compound having a vinyl group, the chain is used as a chain. Examples of the hydrocarbon-like hydrocarbons include ethylene, (four), etc., and examples of the aromatic compound having a vinyl group include styrene, α-methylstyrene, ribo-substituted styrene, and the like. The monomer 322473 27 201121794, which is composed of a cyclic olefin, may be 50 mol% or less (preferably 15 to 5 mol%), especially in the case of using a cyclic olefin and a chain olefin and having a vinyl group. In the case where the terpolymer of the aromatic compound constitutes the transparent protective layer 7, the monomer unit composed of the cyclic olefin can be set to a relatively small amount as described above. In such a terpolymer, it is composed of a chain olefin. The monomer unit and the monomer unit composed of the aromatic compound having a vinyl group are usually about 5 to 8 mol%, respectively. The cycloolefin resin can be produced using a suitable commercial product such as T〇pAS Advanced Polymers GmbH. "TOPAS" sold by P〇lyplastics Co., Ltd., "artqn" sold by JSR (shares), "ZE0N0R" and "ZE0NEX" sold by Japan Zeon Co., Ltd., by Mitsui Chemicals Co., Ltd. )the company When the cycloolefin resin is formed into a film, a known method such as a solvent casting method or a melt extrusion method can be suitably used. For example, a film of a commercially available ring-smoke-type resin such as "ZEONOR FILM" sold by Japan Zeon Co., Ltd., "ARTON FILM" sold by JSR Co., Ltd., or the like is used as the transparent protective layer 7. The chain olefin-based resin to be used for the transparent protective layer 7 is preferably a polypropylene-based resin having propylene as a main constituent unit, a homopolymer of a polypropylene-based resin, or a propylene or a propylene. Other copolymerizable monomers classified as representative examples are copolymerized, and the amount of other copolymerizable monomers is about 10% by weight, for example, about 1 to 10% by weight. The polythick tree can also be formed into a film for the transparent protective layer 7 by a known method such as a solvent casting method or a melt extrusion method. The acrylic resin used for the transparent protective layer 7 is preferably a polymethyl methacrylate-based resin having methyl methacrylate _ 322473 28 201121794 methyl ester as a main constituent unit. In the methacrylate-based resin, acrylic rubber particles may be blended. Further, a multilayer structure of a layer having a polyfluorenyl methacrylate-based resin in which a light-diffusing agent is blended and a layer of a polymethyl methacrylate-based resin having no light-diffusing agent may be formed. The mercapto acrylate based resin is usually formed into a film by melt extrusion. When a multilayer structure is formed, a co-extrusion method can be employed. The polyester-based resin used for the transparent protective layer 7 is preferably a polyethylene terephthalate-based resin mainly composed of terephthalic acid and ethylene glycol. The polyethylene terephthalate-based resin may be formed into a film by a known method such as a solvent casting method or a melt extrusion method, and the film may be further uniaxially or biaxially stretched while maintaining strength. A film which improves transparency is more suitable as the transparent protective layer 7. On the other hand, the active energy ray-curable resin composition for the transparent protective layer 7 may be, for example, a resin composition containing an epoxy-based active energy ray-curable compound, and further an oxetane-based compound may be blended. effective. When the epoxy compound is contained and the oxetane compound is optionally contained as described above, a photocationic polymerization initiator is usually added. The active energy ray-curable resin composition for the transparent protective layer 7 contains a radical polymerizable compound, specifically (fluorenyl), in addition to an epoxy compound and an oxetane compound as an optional component. The method of the acrylic compound is also effective. By using a (meth)acrylic compound in combination, a transparent protective layer having high hardness, excellent mechanical strength, and excellent durability can be obtained. Further, the viscosity, curing speed, and the like of the active energy ray-curing composition can be more easily adjusted. In the active energy ray-curable resin composition for forming the transparent protective film 7, the (fluorenyl) acrylic compound can be added to about 70% by weight based on the total amount of the active energy ray-curable compound. The compounding amount of the (fluorenyl) acrylic compound is more preferably from 35 to 70% by weight, particularly preferably from 40 to 60% by weight. When the compounding amount of the (fluorenyl)acrylic compound exceeds 70% by weight, the adhesion to the polarizing film may be lowered. In the case of disposing such a (fluorenyl) acrylic compound, a photoradical polymerization initiator can be further formulated. The transparent protective film 7 of the polarizing plate 5 may have a surface treatment layer on the surface opposite to the surface on which the polarizing film 6 is bonded. Examples of such surface treatment include antiglare treatment, hard coating treatment, and anti-glare treatment. Electrostatic treatment, anti-reflection treatment, etc. Further, a coating layer containing a liquid crystal compound or a high molecular weight compound or the like may be formed on the surface of the transparent protective layer 7 opposite to the surface on which the polarizing film 6 is bonded. In the case where the transparent protective layer 7 is a resin film, the polarizing film 6 and the transparent protective layer 7 may be bonded using an adhesive. The adhesive agent used for the above-mentioned bonding is a curable resin composition containing an active energy ray-curable compound, and a water-based adhesive obtained by dissolving or dispersing an adhesive component in water. From the viewpoint of improving the productivity without requiring a drying step, it is preferred to use a curable resin composition containing an active energy ray-curable compound as a binder. In this case, as the active energy ray-curable compound, an epoxy-based cationically polymerizable compound is preferably used. Further, in addition to the epoxy compound, it is also effective to formulate a cation-polymerizable oxetane compound. This is in the case of containing an epoxy compound and optionally containing an oxetane.

In the case of S 322473 30 201121794, a photoradical polymerization initiator is usually also available. When the curable resin composition is used as the adhesive, the polarizing film 6 and the transparent protective layer 7 are bonded together by the curable resin composition layer, and then the active resist line is applied to the laminate to cure the curable resin composition layer. In the case of reducing the thickness of the entire polarizing plate 5 from the viewpoint of thinning the adhesive layer, a water-based adhesive agent obtained by dissolving or dispersing the adhesive component in water is preferred. As such a water-based adhesive, an adhesive composition containing a polyvinyl alcohol resin or an urethane resin as a main component is exemplified. In the case where a polyvinyl alcohol-based resin is used as a main component of a water-based adhesive, the polyethylene-based resin may be an anion in addition to partially digesting the polyvinyl alcohol or fully enriching the polyvinyl alcohol. Polyethylene modified by a modified polyvinyl alcohol resin, an ethylene glycol modified polyvinyl alcohol resin, a (four) modified polyethylene glycol resin, a cationic modified polyvinyl alcohol resin, or the like A dilute alcohol resin. When a polyvinyl alcohol-based resin is used as the adhesive component, the adhesive is usually prepared as an aqueous solution of a polyvinyl alcohol-based resin. The concentration of the polyvinyl alcohol-based resin in the subsequent agent is usually from about 1 part to about 5 parts by weight, based on 1 part by weight of the water. In addition, it is also effective to use a crosslinking agent in combination. <Resin layer disposed on the liquid crystal cell substrate side of the polarizing plate> As shown in Fig. 3, when the resin layer 8 is provided on the liquid crystal cell substrate 1 side of the polarizing film 6, the resin layer 8 may be disposed on the polarizing film. The transparent protective layer 7 on the opposite side of the 6 is the same or different from the transparent protective layer, and may be an optical functional layer. As an example of the optical functional layer, a phase difference plate used for 322473 201121794 to compensate for a phase difference caused by a liquid crystal cell or to compensate a viewing angle or the like can be cited. Examples of the retardation film include a birefringent film composed of a stretched film of various resins; a discotic liquid crystal or a film in which a nematic liquid crystal is directionally fixed; and the liquid crystal or the like is formed on the film substrate. A phase difference between an inorganic layered compound or the like is a film obtained by orienting a coating film of a substance. In this case, a cellulose acetate-based resin film such as triacetyl cellulose is preferably used as the film substrate of the coating film containing the phase difference-developing substance. When the birefringence film composed of the resin stretched film is used as the retardation film, it is preferably a cellulose acetate resin or a cycloolefin resin from the viewpoint of the development of the phase difference or the stability of the phase difference. A polypropylene resin or the like is used as a resin material constituting the phase difference plate. The resin itself and the resin phase door described above as the resin film constituting the transparent protective layer 7 can be phase-diffused by the uniaxial or biaxial stretching of these resin films to form a phase difference plate. The stretching ratio is usually from L to 5 times, preferably from 1.1 to 3 times. A film having a phase difference is commercially available for a cellulose acetate resin film or a cycloolefin resin film. For example, as the cellulose acetate-based resin film to which the phase difference is imparted, there are "KC4FR-T" or "KC4HR-T" sold by Konica Minolta Co., Ltd. as a cyclodene imparted with a phase difference. A resin film, such as "S-SINA" or "SCA40" sold by Sekisui Chemical Industry Co., Ltd. In addition, "ZE0N0RFILM" sold by Japan Zeon Co., Ltd. or "ART0N FILM" sold by JSR (share), which is exemplified above as an example of the cycloolefin resin film which can be the transparent protective layer 7, is also given a phase difference. The level. 322473 32 201121794 When the resin layer 8 is formed of a resin film including a phase difference plate, the same adhesive as the above-described adhesive agent applied to the polarizing film 6 and the transparent protective layer 7 can be used, followed by the polarizing film 6 and the resin layer. 8. When a function of compensating for the phase difference caused by the liquid crystal cell and a function of compensating the viewing angle are given to the polarizing plate 5, as in the example shown in FIG. 3, a transparent protective layer 7 is formed on one surface of the polarizing film 6, in the polarization A phase difference plate as the resin layer 8 is laminated on the other surface of the film 6 to form the polarizing plate 5, and the phase difference plate side is bonded to the liquid crystal cell base f1 by the adhesive layer 2 described above. of. As described above, even when the retardation film is laminated on the surface of the polarizing film 6 on the side of the substrate 1 on the substrate 1, the thickness of the entire polarizing plate 5 can be set to 200 m or less. Further, the thickness of the entire polarizing plate 5 may be set to 1 〇〇/Ζπι or less only by appropriately selecting the resin layer 7 and the resin layer 8 to be the phase difference plate. [Method for Producing Optical Laminate] A method for producing a known optical laminate will be described. The optical laminate described can be advantageously manufactured by the following methods. Τα , the side refers to the symbol 第 shown in Fig. 1 for explanation. The shape of the layer of the layer 3, in the glass plate and (4) sheet tree: - heart agent:: the upper layer is set by the process of bonding containing polyethylene (b), including 4 sheets of sheet 3; (6) inspection Process 'Check the bonding process q #人. The splicer composition layer is obtained by splicing the glass plate 1 and the plastic, and removing the defective product detected by Detecting 322473 33 201121794 from the production line; d) The curing step is to cure the adhesive composition layer present in the bonded product in which the defect is not detected by the inspection step. This manufacturing method is useful when the glass plate 1 is a liquid crystal cell substrate, and the plastic sheet 3 is a polarizing plate having an off-axis (4). The polarizing plate may be a separate polarizing film, or another layer may be laminated in advance as described above. As described above with reference to the second and third figures, it is preferable to have a transparent film formed on at least one surface of the polarizing film 6. Protective layer 7. In the case where at least the polarizing plate 5 on which the polarizing film 6 and the transparent protective layer 7 are laminated is used as the plastic sheet 3, the plastic sheet 3' is formed in a state in which the respective layers constituting the polarizing plate 5 are laminated. Then the age of the layered red order (4). Hereinafter, each step shown above will be sequentially described. <Adhesive composition layer forming step (a)> In the adhesive composition layer, the protective film (4) towel is formed on at least one of the respective bonding faces of the glass plate and the plastic sheet 3, and is provided. A layer of an adhesive composition composed of a solution of a polyethylene glycol tree. When the adhesive layer is formed, for example, a method of applying the above-mentioned adhesive composition to the bonding surface of the glass sheet and/or the bonding surface of the plastic sheet 3 can be employed. In addition, as one form of coating, a method may be adopted in which the plastic sheet 3 is supplied to one end of the surface of the glass sheet 1 so as to be bonded thereto, and the above-mentioned adhesive composition is blown between the two. An adhesive composition layer is formed on each of the bonding surfaces of the glass sheet 1 and the plastic sheet 3, and is pressed from the outside of the plastic sheet 3 by a roll, and the subsequent bonding step is continuously performed. The method of applying the 201121794 adhesive composition to the bonding surface of the glass sheet 1 and/or the bonding surface of the plastic sheet 3 is not particularly limited, and for example, a doctor blade, a wire bar, a slit coater, a die coater, a comma can be used. Various coating methods such as applicator and gravure coater. Further, since each of the coating methods has an optimum viscosity range, the viscosity of the adhesive composition (aqueous solution) can be adjusted by adjusting the concentration of the polyvinyl alcohol-based resin in the adhesive composition. <Bonding Step (b)&gt; In the subsequent bonding step (b), the glass sheet 1 and the plastic sheet are bonded by the adhesive composition layer formed in the previous adhesive composition layer forming step (a). Material 3. In this step, as described above, the plastic sheet 3 can be advantageously supplied to the plastic sheet 3 at one end of the surface of the glass sheet 1 so as to be bonded through the adhesive composition layer. The outer side of 3 is pressed by a roller and bonded. From the viewpoint of suppressing the entrapment of the bubble, etc., it is advantageous to adhere the same to the other end of the surface of the glass sheet 1 by one end of the surface of the glass sheet 1 by a roll. <Inspection Step (c)&gt; In the inspection step (c), the laminate obtained in the previous bonding step (b) is inspected, and the defective article is removed from the production line. Of course, as long as no defects are detected, the laminate is sent directly to the next curing step (d). In the inspection step (c), it is possible to check the presence or absence of surface damage, presence or absence of foreign matter, presence or absence of bubbles, presence or absence of axial misalignment, and the like. This inspection can be performed at the manufacturing stage of the liquid crystal panel by a commonly employed method. The laminate in which the defect was detected in the inspection process (c) was removed from the production line. In this stage, since the adhesive composition layer composed of the aqueous solution containing the polyvinyl alcohol-based resin is not cured, the plastic sheet 3 can be easily peeled off from the glass plate 35 322473 201121794 1 . Therefore, the glass sheet 1 from which the plastic sheet 3 is peeled off can be easily removed by water washing or the like, and can be returned to the adhesive composition layer forming step (a) after washing. The laminate in which the defect is detected in the inspection step (c) is removed from the production line, and the plastic sheet 3 is peeled off therefrom, and the glass sheet 1 is returned to the adhesive composition layer forming step (a). A rework operation, that is, after the polarizing plate with the adhesive layer is attached to the liquid crystal cell substrate, the polarizing plate is peeled off and reattached in the case where some defects are found. In the present invention, although the plastic sheet 3 (typically a polarizing plate) is attached to the glass plate 1 (typically a liquid crystal cell substrate) using an adhesive instead of an adhesive, since the adhesive is an aqueous solution, There is an advantage that such a rework operation can be easily performed. <Curing Step (d)> For the qualified bonding in which no defect is detected in the inspection step (c), in the subsequent curing step (d), the glass sheet enamel and the plastic sheet 3 are present. The intervening composition layer is cured. In the curing step (d), the adhesive composition layer is cured by drying at a high temperature, irradiating an active energy ray, or the like to form the adhesive layer 2. The curing of the composition layer is followed by high temperature drying. When the active energy ray is used to cure it, the active energy ray used may be ultraviolet rays, X-rays, electron energy rays or the like. Further, there is a method of curing the adhesive composition layer by standing at a normal temperature. When the adhesive composition layer is cured by high-temperature drying, it is usually preferably carried out at a temperature of 4 Torr to 8 Torr for 1 minute to 24 hours. When the adhesive composition layer is cured by active energy ray irradiation, it is generally preferred to set the cumulative light amount represented by the product of the irradiation illuminance and the irradiation time s 322473 36 201121794 to 5 () l 2 Q ( ) ( ) m J / cm 2 e When the adhesive composition layer is allowed to stand at room temperature, it is usually carried out in an environment of 20 to 30 t: and a humidity of 20% to _. Q + 5 + to 72 hours [liquid crystal display device] = Learning stacks 1〇 to 12, in the liquid crystal cell base and paste. On the opposite side of the surface of the polarizing plate 5, a separate liquid crystal single-layer substrate is disposed, and the liquid crystal is sandwiched between the two or the liquid crystal panel. "Qianjing unit (4) into a liquid crystal cell into a liquid crystal display m (four) in the shape of the crystal structure of the 曰ββ - yang unit substrate sealed with liquid 曰曰 (4) ^ day early forest body made i to plate 1, in A liquid crystal panel is formed on the surface of one or both of them on the surface. In the present invention, the polarizing plate is bonded to the polarizing plate, and the durability is excellent, and the optical layer 4 body is also subjected to a thermal shock test. The liquid crystal display device produced by the thermal shock sample j is also chemicalized. The material is excellent in durability and can be thin and light (Examples) The following description of the present invention is not intended to limit the scope of the present invention, but the present invention is described in terms of "%" and "parts". , 莫 々疋 日本 日本 日本 日本 日本 日本 日本 日本 日本 日本 日本 日本 日本 日本 日本 日本 日本 日本 日本 日本 日本 日本 日本 日本 日本 日本 日本 日本 日本 日本 日本 日本 日本 日本 日本 日本 日本 日本 日本 日本 日本 日本 日本 日本 日本Synthetic metric county modified polypanning clothing, the trade name "Gohsefi 322473 37 201121794 Z-200, the concentration of 4% aqueous solution is 12 points of material» dissolved in pure water 10% concentration of (10) aqueous solution In the acetaminophen-based polyvinyl alcohol aqueous solution, the mixture is used as a cross-linking agent, and the 3-tetrapropylpropoxypropyltrimethoxy heterocycle is used as a cross-linking agent to make the B-branched Polyvinyl alcohol: cross-linking agent: 11 wire and lye solid component weight ratio of 1·0.5. 0.1, further diluted with pure water to make 3 parts of acetonitrile-modified polyvinyl alcohol relative to water coffee To prepare an adhesive composition. (b) Preparation of an optical laminate: Preparation of iodine adsorbed on polyvinyl alcohol A polarizing plate made of a protective film made of triethyl fluorene cellulose having a thickness of 4 Å//m on one surface of a polarizing film in which iodine is oriented (manufactured by Sumitomo Chemical Co., Ltd.) The product name "SR0661A-XNSY" and a thickness of about 70 μm. On the other hand, the transparent glass substrate (the substrate to be a liquid crystal cell substrate) was washed with an ultrasonic glass cleaner (manufactured by MICROTECH Co., Ltd.). The plate is cut into a square size of lOcmxlOcm, and the adhesive composition shown in the above (a) is coated on the polarizing film surface without the protective film and one of the above-mentioned cleaned transparent glass substrates within 30 minutes after preparation. On the surface, the adhesive faces were bonded to each other. After leaving them at room temperature for 24 hours, they were dried at 60 ° C for 3 minutes to form an optical laminate. The thickness of the dried adhesive layer was about 0.1 // m β (Example 2) The crosslinking agent was changed to methylol melamine, and the same procedure as in (a) of Example 1 was carried out to prepare an adhesive composition.

S 38 322473 201121794 The optical laminate was produced in the same manner as in (b) of Example 1. (Examples 3 to 21): In addition to the "G〇hsefimer - Z-200" shown in Example i (hereinafter referred to as "z_2〇〇" in the following table), it is also used as - T compound. In the following table i, the following items are respectively indicated by the symbols shown at the top. T 330. The saponification degree is 95.6 mol% of an anionic polyvinyl alcohol (manufactured by Nippon Synthetic Chemical Industry Co., Ltd., trade name "G〇hsen〇1 T-330", viscosity of an aqueous solution having a concentration of 4% It is 3〇. 〇mPa · sec). KL-318: The saponification degree is 87. 5 mol% of the anion-modified polyvinyl alcohol (manufactured by 曰本可丽丽股份有限公司), the trade name "KL-318", the viscosity of the aqueous solution having a concentration of 4% is 25. 〇mPa · sec). Z-100: Ethyl hydrazide-modified polyvinyl alcohol having a degree of saponification of 99.2 mol% (made by the company of Synthetic Chemical Industry Co., Ltd., trade name "Gohsefimer Z-100", aqueous solution having a concentration of 4%) The viscosity is 5 2mpa · sec). Z-210: Ethyl hydrazide-modified polyvinyl alcohol having a saponification degree of 96·3 mol% (made by the company of Synthetic Chemical Industry Co., Ltd., trade name "G〇hsefimer Z&quot; 210, concentration 4 The viscosity of the % aqueous solution is 13.9 mPa · sec. Z 220. The degree of saponification is 92.5 mol% of ethyl acetoxy modified polyvinyl alcohol (manufactured by Nippon Synthetic Chemical Industry Co., Ltd., trade name "Gohsefimer" The viscosity of the Z_22°, 4% aqueous solution was 13.2 kPa·sec). Z 300·Saponification degree is 98. 5 mol% of ethyl acetonitrile-modified polyvinyl alcohol (manufactured by Synthetic Chemical Industry Co., Ltd., trade name “G〇hsef _ Z-300”, concentration 4 %mp aqueous solution has a viscosity of 27. 9mpa · scratch). 39 322473 201121794 Z-320 : Saponification degree ^ 92. 8 mol % of Ethyl bromide modified polyglycol (produced by Nippon Synthetic Chemical Industry Co., Ltd., trade name "G〇hsefiraer Z-320", New Zealand The 4% aqueous solution has a toughness of 22 5 mPa.sec). Z-410·According degree: 97·8 mol% of ethyl acetonitrile-modified polyvinyl alcohol (manufactured by Sakamoto Synthetic Chemical Industry Co., Ltd., trade name “G〇hsefimer Z-410”, concentration is The viscosity of the 4% aqueous solution is 52.6 mPa · sec). Further, as the crosslinking agent, in addition to the glyoxal shown in Example 1 and the hydroxydecyl melamine shown in Example 2, the following compounds were used. In Table 1 below, the following items are also respectively indicated by the symbols shown at the top. TC-400: an organic titanium compound represented by the formula [(CH3)2CH0]2Ti[0CH2CH2N(CH2CH2〇H)2]2 [manufactured by Matsumoto Fine Chemical Co., Ltd., Japan, trade name "Orgatics TC-400" The chemical name attached to the company is "bis(triethanolamine) diisopropyl titanate"]. Further, this product is sold as a solution containing 80% of an active ingredient and 20% of 2-propanol, and the amount shown below is a value converted into an active ingredient concentration. Glyoxylate Na: sodium glyoxylate. Further, as the glazing coupling agent, in addition to the 3-glycidoxypropyltrimethoxydecane (abbreviated as "3-GPTMS" in Table 1 below) of Example 1, the following is also used. Compound. In the following Table 1, the following items are also respectively indicated by the symbols shown at the top. N-APTMS: N-(2-Aminoethyl)-3-aminopropyltrimethoxy decane. 3-APTMS: 3-aminopropyltrimethoxydecane. 3-MPTMS: 3-mercaptopropyltrimethoxy decane. Using the above polyvinyl alcohol (abbreviated as "PVA" in Table 1), a crosslinking agent of 40 40 322473 201121794 and a decane coupling agent, the formulation ratio of the polyvinyl alcohol: crosslinking agent is shown in Table 1, for example, according to Example 1. (a) to prepare an adhesive composition. The blending amount of the decane coupling agent not shown in Table 1 was the same as in Examples 1 and 2 (weight ratio with respect to the polyvinyl alcohol 1 was 0.1). Moreover, in Examples 4, 5 and 6, no crosslinking agent was formulated. The blending ratios of Example 1 and Example 2 are also shown in Table 1. Further, an optical layered body was produced in the same manner as in (b) of Example 1 using these respective adhesive compositions. (Example 22) The same adhesive composition as that of the adhesive composition shown in Example 16 was used, that is, 3 parts of polyvinyl alcohol "Gohsefimer Z-220" was modified with ethyl acetonitrile relative to 100 parts of water. An adhesive composition prepared by mixing 0.3 parts of sodium glyoxylate as a crosslinking agent and 0.3 parts of 3-glycidoxypropyltrimethoxy decane as a decane coupling agent. On the other hand, a polarizing plate (manufactured by Sumitomo Chemical Co., Ltd., trade name "SRN231A" and a thickness of about 150/zm) was prepared in place of the polarizing plate used in (b) of Example 1, and the polarizing plate was configured. : On the single side of the polarizing film with iodine adsorbed on the polyvinyl alcohol film, a protective film made of triacetyl cellulose having a thickness of 80/zm is bonded to the other side of the polarizing film by a polyvinyl alcohol-based adhesive. On the other hand, a phase difference plate made of cellulose triacetate having a thickness of 40 was bonded by a polyethylene glycol-based adhesive. Further, the phase difference plate surface made of triethyl fluorene cellulose having a thickness of 40 // in the polarizing plate was used as a bonding surface to the transparent glass substrate, and the above-described adhesive composition was used. (b) The same method was used to produce an optical laminate. 41 322473 201121794 [Table l]

Example No. PVA Crosslinking agent relative to 100 parts of water PVA: Crosslinking agent (parts) decane coupling agent Example 1 Z-200 Glyoxal 3: 1.5 3-GPTMS Example 2 Z-200 Hydroxydecyl trimer Fluoroamine 3: 1.5 3-GPTMS Example 3 Z-200 TC-400 3: 1.5 3-GPTMS Example 4 Z-200 (none) 3:0 3-GPTMS Example 5 T-330 (none) 3:0 3-GPTMS Example 6 KL-318 (none) 3:0 3-GPTMS Example 7 Z-100 Glyoxal 3: 1.5 3-GPTMS Example 8 Z-210 Glyoxal 3: 1.5 3-GPTMS Example 9 Z-220 Glyoxal 3: 1.5 3-GPTMS Example 10 Z-300 Glyoxal 3: 1.5 3-GPTMS Example 11 Z-320 Glyoxal 3: 1.5 3-GPTMS Example 12 Z-410 B Dialdehyde 3: 1. 5 3-GPTMS Example 13 Z-200 Hydroxymethylmelamine 3: 1.5 N-APTMS Example 14 Z-200 Hydroxydecyl Melamine 3: 1.5 3-APTMS Example 15 Z- 200 hydroxymethyl melamine 3: 1.5 3-MPTMS Example 16 Z-200 Glyoxylic acid Na 3 : 0.3 3-GPTMS Example 17 Z-200 Glyoxylic acid Na 3 : 0. 3 N-APTMS Example 18 Z-200 Glyoxylic acid Na 3 : 0.3 3-APTMS Example 19 Z-200 Glyoxylic acid Na 3 : 0.3 3-MPTMS Example 20 Z-200 Glyoxylic acid Na 6 : 0. 6 3- GPTMS Example 21 Z-200 Glyoxylic acid Na 9 : 0. 9 3-GPTMS Example 22 Z-200 Glyoxylic acid Na 3 : 0. 3 3-GPTMS s 42 322473 201121794 (Comparative Example 1) In the polyvinyl group In a 20% aqueous solution of pyrrolidone (manufactured by Nippon Shokubai Co., Ltd., trade name "K-85W"), 3-glycidoxypropyltrimethoxy decane as a decane coupling agent is mixed so that Polyvinylpyrrolidone: 'The weight ratio of the solid component of the stone simmering noodle mixture is 1:0. It is further diluted with pure water so that the polyvinylpyrrolidone is 2 parts with respect to 100 parts of water to prepare an adhesive composition. . Using this adhesive composition, an optical layered body was produced in the same manner as in (b) of Example 。. (Comparative Example 2) An acrylic adhesive having a thickness of 25 // m was used instead of the polyvinyl alcohol-based adhesive composition, and the acrylic adhesive was bonded to one surface of a transparent glass substrate in the same manner as in the examples. There is no polarizing film surface to which the protective film is attached in the same polarizing plate used in the same. Then, at 5 〇. The optical pressure laminate was produced by treating it in a pressure cooker at a pressure of 5 kg/cm 2 (about 5 5 MPa) for 20 minutes. (Comparative Example 3) An optical layered body was produced in the same manner as in the method (b) of Example 1, except that pure water was used instead of the polyethylene glycol-based adhesive composition. [Evaluation Test] (a) Endurance Test The durability of the optical layer produced in the above Examples and Comparative Examples was evaluated by the following method. The heat resistance test was carried out under the conditions of storage at a temperature of 80 c for 1 hour, and the heat resistance test was carried out under the conditions of storage at a temperature of 6 〇〇 c and a relative humidity of 90% for 1 hour, and The temperature is cooled to -35 from the state of heating to 7〇〇c 43 322473 201121794. (3) When the material is difficult to be used as (10), and the cycle is repeated (10 times), the smash resistance test (marked as "Hs test resistance," in the table) is performed. The optical laminate 1 after the visual inspection was visually classified according to the following criteria and summarized in Table 2. (Evaluation criteria for heat resistance, heat resistance and thermal shock resistance test) ◎. No bulging, peeling, or polarizing film was observed. Appearance changes such as cracks. 〇: Appearance changes such as bulging, peeling, and polarization cracking are hardly observed. △. Appearance changes such as bulging, peeling, and cracking of the polarizing film can be seen slightly. X : Obviously visible Appearance change such as bulging, peeling, and cracking of the polarizing film. (b) Evaluation of reworkability After bonding the polarizing plate to the glass substrate for 3 hours (in Examples 1 to 2 2 and Comparative Examples 1 and 3, it was placed at room temperature 24). The third hour in the course of the hour 'in the third hour after the end of the autoclave treatment in Comparative Example 2, in order to determine whether or not the polarizing plate can be peeled off from the glass substrate, the direction was 180 in the direction of 300 mm/min from the bonding test piece ( Peel off in the direction of the glass substrate after folding The polarizing plate was subjected to a peeling test. The results were classified according to the following criteria. 'Consolidated in Table 2>> (Reworkability Evaluation Criteria) 〇: Can be peeled off. X: The polarizing plate is broken and cannot be peeled off.

S 322473 44 201121794 [Table 2]

Polyvinyl alcohol Polyvinylpyrrolidinium The optical laminates of Examples 1 to 22 were thin-walled and excellent in durability and reworkability. On the other hand, in the optical layered product of Comparative Example 1 using the aqueous solution of polyvinylpyrrolidone as the composition of the adhesive, a problem occurred in the durability test of 322473 45 201121794. Further, in the optical layered body of Comparative Example 2 in which an acrylic adhesive was used for the glass plate and the polarizing plate, defects occurred in thermal shock resistance and reworkability. Further, in the optical layered body of Comparative Example 3 in which pure water was used as the subsequent agent, defects occurred in the heat-generating property and the thermal shock resistance. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic cross-sectional view showing the basic layer configuration of an optical layered body of the present invention. Fig. 2 is a schematic cross-sectional view showing one embodiment of a layer configuration of an optical layered body of the present invention. Fig. 3 is a schematic cross-sectional view showing another layer configuration of the optical layered body of the present invention. [Description of main component symbols] 1 Glass plate (liquid crystal cell substrate) 2 Next agent layer 3 Plastic sheet 6 Polarizing film 8 Resin layer 5 Polarizing plate 7 Transparent protective layer 10, 11, 12 Optical laminate 46 322473

Claims (1)

201121794 VII. Patent application scope: 1. An optical laminate in which a glass plate and a plastic sheet are laminated by an adhesive layer, and the adhesive layer is formed of an adhesive composition containing a polyvinyl alcohol-based resin. 2. The optical layered body according to claim 1, wherein the binder composition further contains a decane coupling agent. 3. The optical layered body according to claim 1 or 2, wherein the adhesive composition further contains a crosslinking agent. 4. The optical layered body according to claim 1 or 2, wherein the adhesive layer has a thickness of 5/zm or less. 5. The optical layered body according to claim 1 or 2, wherein the glass plate is a liquid crystal early substrate. 6. The optical layered body according to the first or second aspect of the invention, wherein the plastic sheet has a polarizing film in which a dichroic dye is adsorbed on a polyvinyl alcohol-based resin and oriented. Polarizing plate. 7. The optical layered body according to claim 6, wherein the polarizing plate comprises: the polarizing film and a transparent protective layer formed on at least one side thereof. 8. The optical layered body according to claim 7, wherein the polarizing plate comprises: the polarizing film and a transparent protective layer formed on one surface thereof, and a polarizing film surface opposite to the transparent protective layer The adhesive layer is directly bonded to the liquid crystal cell substrate. 9. The optical layered body according to claim 7, wherein the polarizing plate comprises: the polarizing film, a transparent protective layer 1 322473 201121794 formed on one surface thereof, and laminated on the other side of the polarizing film In the phase difference plate, the phase difference plate side is bonded to the plate of the liquid crystal cell by the connector layer. A method for producing an optical layered body in which a plastic sheet is bonded to a soil glass plate, the method comprising the following steps: a step of forming a composition layer, a glass filler plate and a plastic a layer of an adhesive composition comprising an aqueous solution of a polyvinyl alcohol-based resin is provided on at least the surface of each of the bonding surfaces of the sheet; a bonding step of bonding the glass sheet to the substrate layer and the bonding layer Plastic sheet; inspection process 'check the laminate obtained in the above bonding process, remove the defective product from the production line: and the curing process' so that the defect is not detected by the above inspection process The layer of the adhesive composition present in the laminate is cured. The method for producing an optical layered body according to claim 10, wherein the glass sheet is a liquid crystal cell substrate having a dichroic dye adsorbed on a polyvinyl alcohol-based resin and oriented The polarizing plate of the polarizing film. 11 . The method of manufacturing the optical layered body according to claim 1 , wherein the glass sheet is returned after the plastic sheet is peeled off by detecting the flaw σ in the inspection step. This adhesive group formation process is completed.曰 2 322473 s