TWI302993B - - Google Patents

Description

1302993 IX. Description of the Invention: [Technical Field] The present invention relates to an adhesive optical film having an adhesive layer on at least one side of an optical film. Further, an image display device such as a liquid crystal display device, an organic EL display device, or a PDP using the adhesive optical film is used. The optical film with an adhesive according to the present invention is preferably an optical film containing a stretched film, and examples thereof include a polarizing plate, a phase difference plate, an optical compensation film, a brightness enhancement film, and the like. [Prior Art] The liquid crystal display device is used for applications such as electronic computers, time bars, televisions, monitors, and the like. These products are required to be used under various conditions in various environments, and thus various durability is required. Further, in the liquid crystal display device 7, various optical films such as a polarizing plate and a phase difference plate are used. These two learners are used as an adhesive optical boat in order to fit together with various optical members. Therefore, the durability of the optical film attached to the adhesive is also required. The durability of the adhesion-attached optical film is taken for the adhesive layer. For example, it has been proposed to increase the amount of the base used in the adhesive, or to increase the amount of the base in the base polymer. The method of cross-linking. As the aforementioned acrylic adhesive (see Patent Document D. 4:75), it is recommended to impart durability to the adhesive optical film: if it is strengthened by the aforementioned method, as a result, it will be molded into light and film. (4) The residual stress of the layer may impair the optical enthalpy of the liquid crystal, and the display quality of the device is not a problem. This is a serious problem. 1302993 Patent Document 1 · Unexamined Patent Publication No. 1 1-52349 [Summary of the Invention] Mistakes to be solved

Further, the durability of the optical film with an adhesive is mainly based on the improvement of durability under the conditions of local temperature and temperature and high humidity. However, in recent years, in the use of liquid helium and electric wave, the use of televisions and automobiles has been increased. In addition, in the adhesive optical film, high temperature and high temperature and high humidity are required. The durability under the conditions is required to be durable even under low temperature conditions such as -3 (TC). However, the adhesive photonic film (for example, an adhesive layer polarizing plate) using an acrylic adhesive has been used. Durability under high temperature and high temperature and high humidity conditions, but under low temperature conditions below room temperature (additional): long-lasting insufficient 'If the adhesive optical film is exposed to low temperature conditions after being attached to a glass plate or the like , will produce severe warpage.

SUMMARY OF THE INVENTION An object of the present invention is to provide an optical film with an adhesive which can suppress warpage of an optical film even when placed in a low temperature environment below a temperature. The second invention of the film aims to provide a shirt image display device using the adhesive optical film. The present inventors have succeeded in finding the following adhesive optical film to achieve the above object in order to solve the above problems, that is, the present invention is inserted into at least one side and... The film is a layer of 2 (four) in the optical film; characterized in that: the adhesive layer is at least I "layer; the adhesive layer farthest from the optical film (a) "Tg 1302993 is _55 ° C or more The Tg of the adhesive layer (b) closest to the optical film is -3 〇C or less; the Tg of the adhesive layer (a) is souther than the Tg of the adhesive layer (b). The general adhesive has a Tg below room temperature. . The temperature zone near the Tg is the transition zone between the glass state and the rubber state. If the Tg becomes glassy, the elastic modulus of the adhesive will rise sharply with this result, and the result is 'even the heat of the optical film. Dimensional changes with a small degree of shrinkage are not fully responsive, resulting in severe warpage. On the other hand, the warp in the low temperature region is different from the warpage in the heating or humidifying state of the usual test, and the optical film (especially the stretched film) is 90 with the stretching axis. Significant warpage occurs in the direction. If it returns to room temperature, the warp disappears and returns to its original state. This is the feature. This is due to the fact that the stretching axis of the optical film, particularly the crucible and the polarizing plate is 9 Å. The coefficient of thermal expansion of the direction is larger than that of the direction of the stretching axis, and the internal force generated is also 9 与 with the stretching axis. The direction is larger. The phenomenon that the warpage disappears when returning to room temperature shows that the warpage in the low temperature region obviously depends only on the thermal stress of the optical film. In the present invention, the 'adhesive layer is formed in two layers, and the Tg of the adhesive layer (b) closest to the optical film is _3 〇 ° C or less, whereby the size of the member accompanying the optical film in the low temperature region can be suppressed. The stress caused by the change causes the warp. Thereby, it is possible to provide an adhesive optical film which can suppress warpage not only in a high temperature region but also in a low temperature region. The U of the adhesive layer (b) is preferably 35 C or less, more preferably _4 〇〇 c or less, and particularly preferably _5 〇〇 c or less. Further, if the Tg of the adhesive I (b) is too low, the durability under high temperature conditions is low, so that it is preferably -12 (TC or more, more preferably -10 〇 1 or more. 1302993

The other aspect is that the adhesive layer (a) farthest from the optical film is U C or more. The Tg of the adhesive layer (4) is higher than the Tg of the adhesive. ^Tg becomes low. The adhesive layer is generally soft and can be relieved of low temperature: - the main 4 turns 'but the foaming and peeling sometimes occur in the high temperature region. Also, there is a problem that causes workability to deteriorate. In view of the problem 'though considering the adhesion of the adhesive component of 胄Tg to the adhesive: it is: the increase of the concentration, but the Tg ± rise will inhibit the low temperature zone 5 and the song will be formed. The molecular weight and crosslinking degree of the polymer of the agent layer are improved, but the relaxation property under the high temperature and high temperature and high secret parts is lowered, and the warpage is promoted. In order to solve the above problems; ^ The Tg of the adhesive layer (1) closest to the optical film is set below Russia to effectively suppress the distortion caused by the stress accompanying the dimensional change of the member such as the optical tweezers, and the distance optical film The farthest adhesive layer (a) is a layer of adhesive having a higher Tg than the adhesive layer (1), thereby suppressing foaming and peeling in a high temperature region. Since the adhesive layer "B having a higher Tg" is disposed on the outermost side with respect to the optical film as the adhesive layer as the adhesive body, even if the adhesive layer (b) having a Tg of _3 〇 or less is used on the optical film side, The workability is still good, and the stickiness which occurs when the optical film with the adhesive is laminated can be suppressed, and the slag can be prevented. Compared with the adhesive layer (1), the Tg of the adhesive layer (a) is _55. It is preferably _45 £) (: above, more preferably _35 ° C or more. The Tg of the adhesive layer (a) is warped in a low temperature region in order to suppress the excessively high, and Ot or less Preferably, it is preferably _ 10 ° C or less. 1302993 In the adhesive optical film, the difference between the Tg of the adhesive layer (a) and the Tg of the adhesive layer (b) is preferably 5 ° C or more. The warpage is suppressed by the adhesive layer (b) closest to the optical film, and the foaming, peeling, etc. are effectively suppressed by the adhesive layer (a) having a Tg higher than the adhesive layer (b), thereby effectively exerting two Performance, two adhesive layers

The difference in Tg is preferably 5 ° C or more, more preferably HTC or more. Further, when the difference in Tg between the two adhesive layers is too large, the adhesion between the two adhesive layers is lowered by the difference in heat expansion, and as a result, peeling or the like occurs in the durability test or the like. Therefore, the difference in Tg of the two adhesive layers is preferably 1 〇 (more preferably within rc, more preferably within ° C. The above-mentioned adhesive optical film, the internal force (F) of the optical film due to thermal stress is defined as F = α · ΔΤ · E · 1 · h (where α is the thermal expansion coefficient of -60 to 23 ° C, AT is the temperature difference based on 23 ° C, E is the elastic modulus, 丨 is the width, h is In the case of the thickness, the 瘫 optical film has a stretched film, and it is effective that the internal force (F) generated in the direction of 9 〇 is 50 N or more. The optical film having an internal force (F) of 50 N or more is used. The low temperature is likely to cause warpage, and is suitable for use in the adhesive optical film of the present invention. When the internal force (F) of the optical film is 70 N or more, or even 100 N or more, it is suitable for use in the adhesive optical film of the present invention. Among the above-mentioned adhesive optical films, the optical film can be suitably used for a polarizing plate and/or a phase difference plate. When a stretched film is used for a component of a polarizing plate and/or a phase difference plate, light is easily generated at a low temperature. The koji can be used to make the adhesive film optical film of the invention of 1302993. An image display device using an adhesive optical film on at least one of the topsheets/1. [Embodiment] The adhesive optical film of the present invention will be described below with reference to Figure A. Figure 1 is a single film of the optical film 1. The adhesive layer 2 has at least two layers. The adhesive layer 2 has at least two layers. In Fig. 1, the adhesive layer is two layers, and the adhesive layer 2 (b) and the adhesive 1 are sequentially arranged from the optical film 1 side. 2^^). The Tg of the adhesive layer 2 (b) closest to the optical film is _3 〇艽 or less. On the other hand, the adhesive layer 2 (a) which is farthest from the optical film is 51 or more. Further, the adhesive layer 2 (a) of Tg > adhesive layer 2 (M of ^. The adhesive layer 2 (a) can be provided with release sheet 3. 8 adhesive layer 2 (a), 2 (b) A suitable adhesive can be used for the formation, and the type of the adhesive is not particularly limited. Examples of the adhesive include (4) _ primer, acrylic adhesive, linaloic adhesive, urethane adhesive, and ethylene. (4) affixing agents, polyethyl propylene glycol adhesives, polyethylene _ mouth each (four) 糸 adhesive, polyacrylamide-based adhesives, cellulose-based adhesives, etc. Among the adhesives, the preferred user is optically transparent Excellent in sexual properties, showing appropriate dipping, (4) sexual and adhesive (4), heat resistance, etc. It can be improved, and it is better to use acrylic adhesives. The acrylic adhesive is a base polymer of a mercapto) acryl base skeleton. Further, (methyl 10 1302993 alkylene olefinate means alkyl acrylate and/or alkyl methacrylate, which has the same meaning as (meth) of the present invention. It constitutes the main bone of the acrylic polymer ( The methyl methacrylate may, for example, be a linear or branched alkyl carbon number of 2 to 20. For example, ethyl (meth)acrylate or butyl (meth) acrylate may be mentioned. 2-ethylhexyl methacrylate, isooctyl (meth) acrylate, isodecyl (meth) acrylate, isomyristyl (meth) acrylate, lauryl (meth) acrylate, etc. Among the polymers, one type or more of comonomers can be introduced by copolymerization for the purpose of improving the adhesion and heat resistance. Specific examples of such a comonomer include, for example, (meth)acrylic acid 2-hydroxyl group. Ethyl ester, 2-hydroxypropyl (meth)acrylate, 4-hydroxybutyl (meth)acrylate, 6-ylhexyl (meth)acrylate, 8-methyloctyl (meth)acrylate, (A) Acetyl 1 hydroxy hydroxy ester, (mercapto) propyl a trans-group-containing monomer such as 12-hydroxylauryl ester of enoic acid and (4-hydroxymethylcyclohexyl)-decyl acrylate; (meth)acrylic acid, carboxyethyl (meth)acrylate, carboxyl group of (fluorenyl) acrylate a carboxyl group-containing monomer such as amyl ester, itaconic acid, maleic acid, fumaric acid, crotonic acid, etc.; an acid anhydride group-containing monomer such as maleic anhydride or itaconic anhydride; a caprolactone adduct of acrylic acid, styrenesulfonate Acid or allyl sulfonic acid, 2-(meth) acrylamide- 2-methylpropane sulfonic acid, (meth) acrylamide propyl sulfonate, sulfopropyl (meth) acrylate, (methyl) a sulfonic acid group-containing monomer such as acryloxynaphthalenesulfonic acid or the like; a phosphate group-containing monomer such as 2-hydroxyethyl propylene sulfonate phosphate, etc. Further, a monomer based on the purpose of modification may be mentioned (A) Base acrylamide, N,N-dimethyl(methyl) acrylamide, N-butyl(methyl) acrylamide, N-11 1302993 hydroxymethyl(fluorenyl) acrylamide, (N-substituted) guanamine monomer such as N-methylolpropane (fluorenyl) acrylamide; aminoethyl (meth) acrylate, (methyl) An alkylaminoalkyl (meth) acrylate monomer such as N,N-dimethylaminoethyl acrylate or tert-butylaminoethyl (meth)acrylate; bismuth (meth)acrylate a (meth)acrylic acid decyloxyalkyl ester monomer such as oxyethyl ester or ethoxyethyl (meth)acrylate; N-(methyl)acryloxymethoxymethyl amber imine, N- (Methyl) acrylamido-6-oxyhexamethylene succinimide, ^-(methyl) propylene fluorenyl 8-oxo octamethyl succinimide, n-propyl hydrazide Amber quinone imine monomer, etc. Further, in terms of modifying monomers, vinyl acetate, vinyl propionate, N-vinyl pyrrolidone, methyl vinyl pyrrolidone, vinyl pyridine can also be used. , Ethyl piperidone, vinylpyrimidine, vinyl piperazine, vinylpyrazine, vinylpyrrole, vinyl sulphur, vinyl oxazole, ethene oxime, N-vinyl carboxylic acid decylamine, stupid ethylene, ο?-methyl a vinyl monomer such as styrene or N-ethylene caprolactam; a cyanopropionate monomer such as acrylonitrile or methyl acrylonitrile; and (meth)acrylic acid shrinkage An epoxy group-containing acrylic monomer such as glyceride; (meth)acrylic acid polyethylene glycol, (meth)acrylic acid polypropylene glycol, (mercapto)acrylic acid methoxyethylene glycol, (mercapto)acrylic acid a glycol such as oxypolypropylene glycol is an acrylic acid vinegar; (meth) acrylic acid tetrahydroanthracene vinegar, fluorine (meth) acrylate vinegar, anthrone (fluorenyl) acrylate vinegar or acrylic acid 2-a An acrylate monomer or the like such as oxyacetic acid. Among the liquid crystal element-bonded and carboxyl group-containing monomers, it is preferable to use a hydroxyl group-containing monomer based on the consideration of durability and durability when used as an optical ray. These monomers will become the reaction point with the crosslinking agent 12 1302993. The adhesive layer (b) is formed by having a low Tg of -30 ° C or less, and the adhesive layer is formed of an acrylic adhesive. The alkyl (meth) acrylate used in the acrylic polymer is preferably an alkyl group having 2 to 20 carbon atoms, particularly preferably an alkyl acrylate having a branched alkyl group. For example, 2-ethylhexyl acrylate, isooctyl acrylate, isodecyl acrylate, isomyristyl acrylate or the like is suitable. When the acrylic pressure-sensitive adhesive is used for the pressure-sensitive adhesive layer (b), the ratio of the copolymer monomer in the acrylic polymer is not particularly limited, and is 0 to 30% by weight of the total constituent monomer. Better, better than 1515%.

On the other hand, the adhesive layer (a) is formed by having _55 ° C, and the adhesive layer is formed of an acrylic adhesive, and the bismuth-based bismuth acrylate is used in the propylene self-window extract. The ester is preferably an alkyl group having 2 to 20 carbon atoms as described above. For example, butyl acrylate, ethyl acrylate or the like can be suitably used. In the case where the acrylic adhesive is used in the adhesive layer (a), the ratio of the copolymer monomer in the propylene (tetra) polymer is not particularly limited, and is 〇3 to 3% in the weight ratio of the total constituent monomers. The degree is better, and the best is 〇~15%. The average molecular weight of the acrylic polymer is not particularly limited, and the weight average is preferably about 300,000 to 250,000. The above-mentioned acrylic acid polymer can be produced by various known methods, and a radical polymerization method such as a weaving method, a solution polymerization method or a suspension polymerization method can be suitably selected. = by: the polymerization initiator can use azo-based, peroxide!; Γ2, often 5 〇, about, when the reaction - ^ in the production method of the edge of the edge is better by solution polymerization, in acrylic acid 13 1302993 = The solvent is generally used in the form of B, and the degree is usually about 20 to 80% by weight. T this special. The solution is based on the rubber-based adhesive polymer rubber, isopropylene rubber, styrene / 'bull out such as natural ψ w ^ ^ thin 糸 rubber, re+ _ ♦ isobutylene rubber, and styrene - raw rubber, benzene Ethylene-butadiene-phenylene-based rubber, etc. = rubber, do not use, for example, dimethyl poly-stone oxygen burning, these basic polymers can also make the material (four), etc. = Shi Xi = agent To make an adhesive containing a crosslinking agent::. More than 1: = compounded polyfunctional compound can be exemplified by organic cross-linking agent, blood "green metal integrator. In organic cross-linking agent": co-agent, iso-acidic cross-linking agent, imine cross-linking The agent may be used alone or in combination of two or more kinds, and the isocyanic acid-based crosslinking agent is preferably used in combination with the crosslinking agent. Multifunctionality ^ Integration = covalent bonding or coordination bonding of polyvalent metals with organic compounds. Examples of polyvalent metal atoms include Cr, Zr, Co, Cu, :e : Νί, V, & 沁, Ca , 峋, Μη, Y, Ce, Sr, Ba, M:, La Sn, T!, etc. Among the organic compounds which carry out covalent bonding or coordination bonding, the atom may be an oxygen atom or the like, in terms of an organic compound The alkyl ester, the alcohol compound, the carboxylic acid compound, the ether compound, the ketone compound, etc. The ratio of the base polymer to the crosslinking agent, such as a propylene S-type polymer, is not particularly limited, and is usually relative to the base polymer. (solid content) 100 parts by weight, the crosslinking agent (solid content) is preferably about 1 to 20 parts by weight, and about 0.01 to 15 parts by weight. Further, 1302993 Further, various additives may be added to the adhesive in the range which does not deviate from the object of the present invention, and the additives include an adhesion-imparting agent, a plasticizer, glass fiber, glass beads, metal powder, and other inorganic substances. Powder "small: into fillers, pigments, colorants, fillers, antioxidants, UV absorbers, Shi Xi Hyun coupling agents. Further, it is also possible to contain fine particles to form an adhesive layer which exhibits light diffusibility. The decane coupling agent is suitable for the additive, and the stone smelting coupling agent (solid component 0·0 (Η~H) is preferably in a weight ratio of 0·005~ relative to 100 parts by weight of the basic polyperson (solid component). It is more preferably about 5 parts by weight. The decane coupling agent is not particularly limited and used in the prior art, and examples thereof include glycidylpropyltrimethoxy (tetra), 3-glycidyldipropyltriethoxydecane. An epoxy group-containing decane coupling agent such as 3-glycidyl propyl oxydiethoxy decane or 2 (3'4-monooxycyclohexyl)ethyltrimethoxy decane, or 3-aminopropyl Trimethoxy decane, Ν-2-(aminoethyl)-3-aminopropylmethyldimethoxy decane, 3-triethoxymethyl sulfonyl-indole-(1,3_ An amine group-containing sulphur coupling agent such as dimethylbutylidene) propylamine, 3-propyloxypropyltrimethoxy sylvestre, 3-methylpropoxy oxypropyltriethoxy decane, etc. An isocyanate group-containing sulphur coupling agent containing a (meth)acrylic group-based decane coupling oxime, 3-isocyanurate propyl triethoxy zexi 9 or the like. The t-optical film used in the adhesive optical film of the present invention is not particularly limited as long as it is used in the formation of an image display device such as a liquid crystal display device. The optical film is suitable for a polarizing plate or a phase difference plate. It is suitable to have a stretch film. 1302993

The polarizing plate is generally used for a transparent protective film on one side or both sides of a polarizing element. The polarizing element is not particularly limited, and various polarizing elements can be used. Examples of the polarizing element include adsorption of iodine or dichroism in a hydrophilic polymer film such as a polyvinyl alcohol film, a partially methylalized polyvinyl alcohol film, or an ethylene-vinyl acetate copolymer-based partial saponified hydrazine. The dichroic substance of the dye is a uniaxially stretched material, a dehydrated material of polyvinyl alcohol, or a polyolefin-based alignment film such as a dehydrochlorinated product of polyethylene gas. Among these, a polarizing element composed of a dichromatic substance such as polyvinyl alcohol hydrazine or iodine is preferred. The thickness of the polarizing elements is not particularly limited and is generally about 5 to 8 Å μm. A polarizing element in which a polyvinyl alcohol-based film is uniaxially stretched by iodine is used. For example, a polyvinyl alcohol is impregnated into a moth aqueous solution to be pure, and then stretched to a length of 3 to 7 times the original length. It may also contain boric acid or sulfuric acid, chlorination, etc., or may be impregnated in an aqueous solution of potassium or potassium. In addition, the polyvinyl alcohol film may be immersed in water for washing in a wooden color. When the polyethylene film is washed with water, the stain or adhesion of the surface of the polyethylene film can be washed to prevent d. Further, if the polyvinyl alcohol film is swollen, the effect of preventing uneven dyeing is obtained. Stretching can be carried out after (d) dyeing, or by dyeing: or by stretching after stretching. It can also be stretched in a water bath or a water bath such as boric acid or potassium peroxide.佯二以: It is transparent on one or both sides of the aforementioned polarizing element = :::r transparency, mechanical strength, thermal stability, moisture resistance - alcohol " $2 is better. Examples thereof include a polystyrene polymer such as polyethylene terephthalate or a cellulose polymer such as diethyl or cellulose phthalate, and a polymethyl 16 1302993 acrylonitrile. An acrylic polymer such as a decyl ester, a styrene polymer such as polystyrene or acrylonitrile-styrene copolymer (AS resin), or a polyglycol-based polymer. 'Polyethylene, polypropylene, polyfluorene hydrocarbons with ring structure or norbornene thin structure, poly-hydrocarbon polymer like ethylene-propylene copolymer, vinyl chloride polymer, nylon or aromatic polyfluorene Amine-based polymer such as amine, quinone-based polymer, maple-based polymer, polyether-based polymer, polyetheretherketone-based polymer, polythiobenzene-based polymer, and vinyl alcohol-based polymer A vinyl chloride polymer, a vinyl butyral polymer, an aryl ester polymer, a polyoxymethylene polymer, an epoxy polymer, or a blend of the above polymers can also form the aforementioned transparent protection. The polymer of the film. The transparent protective film can also be formed in the form of a cured layer of a thermosetting or ultraviolet curable resin such as an acrylic, an amino phthalate, an urethane, an epoxy or a ketene. Further, a polymer film carried out by JP-A-2001-343529 (W001/37007), for example, a thermoplastic resin containing (A) a side chain having a substitution and/or an unsubstituted brewed imine group, and (B) A resin composition having a side chain having a thermoplastic resin substituted and/or an unsubstituted phenyl group and a nitro group. Specifically, the resin composition film may contain a copolymer of isobutylene and N-methylmaleimide and a copolymer of acrylonitrile-styrene. As the film, a film composed of a mixed extrusion of a resin composition or the like can be used. The thickness of the protective film can be appropriately determined, and it is generally based on the viewpoints such as workability and film properties such as strength and usability. Especially 5~2〇〇 // m is better. Further, the protective film is preferably as colorless as possible. Yes, to use 17 1302993

Rth [(nx+ny)/2_nz]. d (the towel, ηχ, the main refractive index in the plane of the ny film, the refractive index in the thickness direction of nz, the thickness of the d film) is the phase difference in the film thickness direction A protective film of _90 nm to +75 nm is preferred. If a protective film having a phase difference (Rth) in the film thickness direction of _9 〇 nm to +75 nm is used, the polarizing plate coloring (optical coloring) caused by the # film can be solved. The thickness direction phase difference (Rth) is more preferably _8 〇 nm to +6 〇 nm, and particularly preferably - 70 nm to +45 nm 〇

In terms of the protective film, a cellulose-based polymer such as triethylsulfonyl cellulose is preferred from the viewpoint of polarization characteristics and durability. In particular, a triacetone: cellulose film is suitable. X, a protective film is provided on both sides of the polarizing element; in the case, the same polymer material may be used in the surface to form a protective film, and a different polymer material may be used to form the protective film. The polarizing element and the protective film are usually adhered to each other through a water-based adhesive or the like. Examples of the water-based adhesive include an isocyanic acid (iv) adhesive, a polyvinyl alcohol-based adhesive, a gelatin-based adhesive, a vinyl latex, an aqueous polyurethane, and an aqueous polyester. The surface of the transparent protective film which is not attached to the polarizing element can be subjected to a hard coat layer or an anti-reflection treatment, a treatment for the purpose of adhesion prevention, diffusion or anti-glare. The hard coat treatment is applied for the purpose of preventing scratches on the surface of the polarizing plate, etc., for example, "hardening and smoothness can be obtained by adding an appropriate ultraviolet curable resin such as (4) acid or _ system to the surface of the transparent protective film. A hardened film with good characteristics. The anti-reflection treatment is used to prevent the reflection of the surface of the polarizing plate, and can be achieved by a conventional method of forming an anti-reflection film. Moreover, the anti-sticking treatment is based on the purpose of preventing adhesion to adjacent layers of other members.

By. W 18 1302993 = The treatment is performed based on the purpose of preventing external light from being reflected on the surface of the polarizing plate and obstructing the transmission of polarized dies, for example, by roughing or embossing, or by matching transparent particles. A fine concavo-convex structure is formed on the surface of the transparent protective film by an appropriate method such as a method. The fine particles forming the fine concavo-convex structure of the surface may have, for example, an average particle diameter of 〇5 to qing, such as κ 匕 夕 、, oxidation, titanium oxide, cerium oxide, tin oxide, indium oxide, cadmium cadmium, cerium oxide, and the like. Transparent fine particles such as organic fine particles (beads) composed of conductive inorganic fine particles, crosslinked or uncrosslinked polymers. When the surface fine concavo-convex structure is formed, the amount of the fine particles is preferably from 2 to 50 parts by weight, and preferably from 5 to 25 parts by weight, based on 1 part by weight of the transparent resin forming the surface fine concavo-convex structure. The anti-glare layer also serves as a diffusion layer (viewing angle expansion function) for diffusing the light beam through the polarizing plate to enlarge the viewing angle or the like. Further, the anti-reflection layer, the anti-adhesion layer, the diffusion layer or the anti-glare layer may be directly provided on the transparent protective vine film, or may be provided separately from the transparent protective film in the form of a layer. Further, examples of the optical film include a reflector or a semi-transmissive plate, a phase difference plate (including a 1/2 or 1/4 wavelength plate), a visual compensation film, and a brightness enhancement film equal to those used for forming a liquid crystal display device. Optical layer. These may be used as an optical film alone, or may be laminated to the polarizing plate 0 in actual use, and particularly, a polarizing plate or a semi-transparent reflecting plate is further formed on the polarizing plate. a reflective polarizing plate or a semi-transmissive polarizing plate, an elliptically polarizing plate or a circularly polarized light plate formed by a retardation plate on a polarizing plate, and a wide viewing angle polarizing plate formed by a visual compensation film on a polarizing plate, or A polarizing plate formed by a brightness enhancement film is further laminated on the polarizing plate. The reflective polarizing plate is provided with a reflective layer on the polarizing plate to form a liquid crystal display device of a type that reflects incident light from the viewing side (display side), and can omit a light source such as a built-in backlight. It is an advantage to make the liquid crystal display device thin. The formation of the reflective polarizing plate can be carried out by a suitable method such as a method of providing a reflective layer made of a metal or the like on one surface of the polarizing plate through a transparent protective layer or the like. Specific examples of the reflective polarizing plate include, for example, a case made of a reflective metal such as a reflective metal or a vaporized film to form a reflective layer or the like on one surface of the transparent protective film subjected to the matte treatment. Alternatively, the transparent protective film may be made of fine particles having a fine concavo-convex structure on the surface, and a reflective layer having a fine concavo-convex structure thereon. The above-mentioned fine concavo-convex structure is only called a reflective layer of 1^, which can reflect irregularities of human light to spread, prevent directionality or glare appearance, and can suppress unevenness of light and dark, which is an advantage. Further, the transparent protective film containing fine particles can diffuse the incident reflected light while passing through to suppress the unevenness of light and dark, which is also the case. The micro-implantation method, the sputtering method or the electric ore reflecting the fine concavo-convex structure on the surface of the transparent protective film;::;, is provided on the surface of the transparent protective layer. The method of directly attaching the metal directly to the reflecting plate can be used, for example, on the appropriate film based on the transparent medium, the moon protective film, or the like. In addition, since the reflective layer is usually made of a reflective layered metal, the reflective surface is covered by a protective film or a polarizing plate, and the reflectance is reduced or even maintained for a long period of time. The idea of initial reflectivity and the idea of avoiding the need for additional protective layers is a better approach. Further, the semi-transmissive polarizing plate can be obtained by providing a semi-transmissive reflective layer such as a semi-lens which reflects the light reflected by the reflective layer and transmits the light. The semi-transmissive polarizing plate is usually disposed inside the liquid crystal element, and can be used to form a liquid crystal display device of the following type: when the liquid crystal display device or the like is used in a relatively bright environment, the visual side (from the visual side) The incident light on the display side is reflected to display an image, and in a relatively dark environment, the image is displayed using a built-in light source such as a backlight built in the inside of the semi-transmissive polarizing plate. In other words, the semi-transmissive polarizing plate is useful for a liquid crystal display device of a type that can be used in a bright environment, a light source that is used in a light source, and a light source that can be used in a relatively dark environment. By. Hereinafter, an elliptical polarizing plate or a circularly polarizing plate which is formed by further laminating a phase difference plate on a polarizing plate will be described. A phase difference plate or the like is used when the linearly polarized light is changed into elliptically polarized light or circularly polarized light or from elliptically polarized or circularly polarized light to linearly polarized light, or the direction of polarization of the linearly polarized light is changed. In particular, a phase difference plate capable of changing a linearly polarized light into a circularly polarized light or a circularly polarized light into a linearly polarized light is a 1/4 wavelength plate (also referred to as a λ/4 plate). } /2-wavelength plates (also known as in/2 plates) are commonly used to change the direction of polarization of linearly polarized light. The elliptically polarizing plate can compensate (prevent) the color (blue or yellow) generated by the birefringence of the liquid crystal layer of the super twisted nematic (STN) type liquid crystal display device, and can be effectively used in the case of black and white display without the aforementioned coloring. Furthermore, the three-dimensional refractive index is controlled by the controller, and it is also preferable to compensate (prevent) the 21 1302993 2 when viewing the screen of the liquid crystal display device from the oblique direction. The circular polarizer can be used for: - for example, a reflective liquid crystal display in which the image is displayed in color: in the case of adjusting the hue, and the like, and also in preventing reflection. - As a phase difference plate, it can be exemplified by a 屮 姐 姐 丄 . . . . . 对 对 对 对 对 分子 分子 分子 分子 分子 分子 分子 分子 分子 分子 分子 分子 分子 分子 分子 分子 分子 分子 分子 分子 分子 分子 分子 分子 分子 分子 分子 分子limited::. Thickness of the phase difference plate

The polymer material may, for example, be 1 ethyl alcohol, polyethylene, olefinic ether polyhydroxyethyl acrylate, hydroxyethyl cellulose, bismuth, hydroxypropyl cellulose, methyl cellulose, polycarbonate, Poly, poly-grinding, polyethylene terephthalate " 2,6-naphthalene diethylene glycol vinegar, poly- 1 benzene sulphur, poly benzene _, poly propylene propylene, poly amide, poly phthalimide , a polybasic hydrocarbon, a polyvinyl chloride, a cellulose polymer, a norbornene rare resin, or various binary, ternary copolymers, graft copolymers, blends, and the like. These polymer materials are oriented to form an alignment (stretching film) by stretching. The liquid crystal polymer is, for example, a main chain type or a side chain type liquid crystal polymer in which a light-chain linear group (liquid crystal group: mesogen) which imparts liquid crystal alignment properties is introduced into a main chain or a side chain of a polymer. Specific examples of the main-bond type liquid crystal polymer include, for example, a structure in which a liquid crystal group is bonded to a spacer which imparts buckling property, for example, a tantalum-resistant polyester liquid crystal. Polymers, dish polymers and cholesteric polymers. Specific examples of the side chain type liquid crystal polymer include polyfluorene oxide 1 acrylate, polyacrylic acid vinegar or polymalonic acid vinegar as the main chain skeleton, and the work is carried out as a side chain by 22 1302993. The spacer portion of the rough group which consists of a ruthenium atomic group has a cyclic compound unit in which the alignment of the nematic alignment is substituted. These liquid crystal polymers can be subjected to a rubbing treatment by, for example, a surface of a film of a polyimide or a polyvinyl alcohol formed on a glass, or an alignment treatment surface of an oxide ore oblique steaming. The solution of the liquid crystal polymer is stretched and heat treated. The phase difference plate may be an appropriate phase difference for the purpose of compensating for coloring and viewing angle due to birefringence of various wavelength plates or liquid crystal layers, or may be used to cope with $丨〇. In order to control the optical characteristics such as the phase difference, the two types of phase difference plates are laminated. Further, the elliptically polarizing plate and the reflective elliptically polarizing plate are formed by laminating a polarizing plate, a reflective polarizing plate, and a phase difference plate in a suitable combination. The elliptically polarizing plate or the like can be formed by combining a (reflective) polarizing plate and a phase difference plate in a manner similar to that in the manufacturing process of the liquid crystal display device, and forming a 'only' as described above. An optical film such as an elliptically polarizing plate is excellent in quality stability and laminating workability, and thus it is advantageous in that the manufacturing efficiency of a liquid crystal display device or the like can be improved. The visual compensation film is used to make the screen of the liquid crystal display device more clearly visible when the screen of the liquid crystal display device is viewed from a direction that is not perpendicular to the screen but is oblique. Such a visually compensated retardation plate is composed of, for example, a retardation film, an alignment film such as a liquid crystal polymer, or an alignment layer which supports a liquid crystal polymer or the like on a transparent substrate. The phase difference plate of the system is a polymer film having birefringence which is uniaxially stretched in the plane direction thereof, and the phase difference plate which is a visual compensation film is used to apply a biaxial axis in the plane direction. Stretched polymer film having birefringence, 23 1302993 or a polymer film having a refractive index controlled by a uniaxial stretching in the plane direction and a tensile direction in the thickness direction, controlled by a birefringence, Or use: Stretch film in the direction of the diagonal alignment film. As the oblique alignment film, for example, a heat shrinkable film is adhered to the polymer film, and the polymer is subjected to a stretching treatment and/or shrinkage treatment by a contraction force generated by heating; or the liquid crystal polymer is inclined To the aligners and so on. The raw material polymer of the phase difference plate may be the same as the polymer described in the previous phase difference plate, and may be colored or designed to prevent the change of the viewing angle based on the phase difference caused by the liquid crystal element. The purpose of the viewing angle, etc. In addition, in order to achieve a wide range of good visual field of view considerations, it is preferred to use triethyl fluorenyl cellulose to support the optically anisotropic layer (the alignment layer of the liquid crystal polymer, especially the dish liquid crystal polymer) An optical compensation phase difference plate formed by the alignment layer. A polarizing plate in which a polarizing plate and a brightness enhancement film are bonded together is usually used inside the liquid crystal element. The brightness-enhancing film exhibits the characteristics of other light penetration by reflecting a linearly polarized light of a predetermined polarization axis or a circularly polarized light of a predetermined direction due to a state in which natural light is incident due to a backlight of a liquid crystal display device or the like, or reflection from the inside. Therefore, the polarizing plate laminated with the brightness enhancement film and the polarizing plate can cause light from a light source such as a backlight to be incident to obtain a transmitted light of a predetermined polarization state, and does not reflect light other than the predetermined polarization state but reflects it. . The light reflected by the brightness enhancement film surface is reversely incident on the brightness enhancement film via a reflection layer or the like provided on the rear side thereof, and is partially or completely penetrated by light of a predetermined polarization state to increase the passage. The brightness of the film is increased by the brightness of the film, and the polarized light that is not easily absorbed by the polarizing film is supplied to obtain a light amount that can be used for liquid crystal image display or the like to increase the brightness. In other words, when the light is incident from the inside of the liquid crystal element by a backlight or the like without using a brightness enhancement film, the light whose polarization direction does not coincide with the polarization axis of the polarizing film is absorbed by the polarizing film, and is not Pass through the polarizing film. That is, although the characteristics of the polarizing film to be used differ depending on the characteristics of the polarizing film to be used, substantially 50% of the light is absorbed by the polarizing film, and the amount of light available for the liquid crystal display device or the like is reduced, resulting in darkening of the image. The brightness enhancement film is such that the light in the polarization direction that is absorbed by the polarizing film is not incident on the polarizing film, but is reflected by the brightness enhancement film, and is further incident on the brightness enhancement film through the reflection layer provided on the rear side thereof, and so on. In the brightness enhancement film, only the light reflected and reversed between the two is supplied to the polarizing film through the polarized light in the polarizing direction of the polarizing plate, so that the light of the backlight or the like can be effectively used for image display of the liquid crystal display device. The picture can be bright. A diffusion plate may be provided between the relief film and the reflective layer or the like. The light system in which the polarized state reflected by the film is raised by 7C is advanced toward the reflective layer or the like, and the diffusing plate provided allows the passing light to uniformly diffuse and eliminate the polarized state to be in a non-polarized state. In other words, the light in the natural light state travels toward the reflective layer or the like, is reflected by the reflective layer, and is incident on the brightness enhancement film through the diffusion plate, and is thus repeated. By providing a diffusion plate for returning the polarized light to the original natural light between the brightness enhancement film and the reflective layer, the brightness of the display screen can be maintained, and the unevenness of the brightness of the display surface can be reduced, and the display can be provided. Uniform bright face. It is believed that by providing a diffuser, the initial incident light, along with the appropriate number of repetitions of the reflection, provides a uniform, bright display surface, in conjunction with the action of the diffuser. 25 1302993 As the brightness-enhancing film, for example, a multilayer film of a dielectric or a multilayer laminated body of a film having a different refractive index anisotropy can be used, and a linear polarized light which can pass a predetermined polarization axis is used. The characteristic of light reflection; the alignment film supporting the cholesteric liquid crystal polymer on the film substrate or its alignment liquid crystal layer, which shows that one of the left-handed or right-handed circles can be polarized to reflect other light. Characteristics, etc. Therefore, the aforementioned brightness enhancement film of the type that allows the linear polarization of the predetermined polarization axis to penetrate can be incident on the polarization plate by directly aligning the transmitted light with the polarization axis, thereby suppressing the loss of absorption by the polarizing plate, and is efficient. Ground penetration. On the other hand, a brightness enhancement film of a type that penetrates a circularly polarized light like a cholesteric liquid crystal layer can directly cause light to be incident on the polarizing film, but suppresses the absorption loss consideration, and the circularly polarized light passes through the phase difference plate. Linear polarization is preferably incident on the polarizing plate. Further, by using a quarter-wave plate, circularly polarized light can be converted into linearly polarized light.

A phase difference plate having a quarter-wave plate function in a wide wavelength range such as a visible light region can be played by, for example, a phase difference layer that functions as a 1⁄4 wavelength plate for monochromatic light having a wavelength of 55 〇 nm. "2 > The length of the skin long board function, the difference layer is obtained by overlapping. Because of @, the phase difference plate disposed between the polarizing plate and the brightness and the rising film can be composed of one layer or at least two or more layers. The cholesteric liquid crystal layer can be obtained by combining two layers or at least three layers having different reflection wavelengths to obtain a circularly polarized reflection in the visible light region, thereby obtaining a wide wavelength range of 261302993 and a polarizing plate. It may be formed by laminating a polarizing plate and two or more optical layers as in the case of the above-described polarization separation type polarizing plate. Therefore, a reflective elliptically polarizing plate or a semi-transmissive elliptically polarizing plate formed by combining the above-described reflective polarizing plate or semi-transmissive polarizing plate and retardation plate may be used. The optical film formed by laminating the optical layer on a polarizing plate can be formed by laminating one by one in a manufacturing process of a liquid crystal display device or the like, and laminated as an optical film in advance for quality stability and assembly work. It is superior in terms of properties, so that the process of liquid crystal display devices and the like can be improved, which is an advantage. For the implementation of the layer, an appropriate follow-up means such as a layer can be used. When the polarizing plate is bonded to another optical layer, the optical axis of the polarizing plate can be appropriately arranged at an appropriate angle depending on the phase difference characteristics of the desired object. The production of the adhesive-attached optical film of the present invention is carried out by forming the adhesive layers 2 (a) and 2 (b) on the optical film. The method of forming the film is not particularly limited, and examples thereof include a method of drying by applying an adhesive solution, a method of transferring a release sheet having an adhesive layer, and the like. Adhesive layer 2 The thickness of the two V 2 (1) is not particularly limited, and is 3 to _ (four) left 10 to 4 °, respectively. If the thickness of the adhesive layer used is thin, it is easy to describe the tendency of foaming or peeling to be low. In addition, if it is used, there is a possibility that the warpage suppression effect may be improved, but the workability tends to be easy to suppress. When X' is formed on the adhesive layer, it may be first: lowering and then forming an adhesive layer. ^ After forming the antistatic layer, in terms of the constituent materials of the release sheet, the olefin, the polyethylene terephthalate, etc., the cow paper, the polyethylene, the polypropylene film, the rubber film, the paper, the 27 1302993 cloth A suitable sheet such as a non-woven fabric, a mesh body, a foamed sheet or a metal, or a laminate of the above. In order to improve the peeling property of the adhesive layer on the surface of the release sheet, a low-adhesion peeling treatment such as phase treatment, long (four) treatment, or fluorine treatment may be applied. Further, in the optical film or the adhesive layer of the adhesive (four) optical film of the present invention, for example, a salicylate compound or a benzophenone compound benzodiazole compound or a cyanoacrylate compound is used. The method of treating the external absorbent such as the nickel-missing salt-based sputum and the like to impart ultraviolet light-receiving ability. v The adhesive optical film of the present invention can be applied to the formation of a type of image display device such as a liquid crystal display device. The formation of the liquid crystal display device can be carried out in accordance with a self-conceived technique. In other words, the liquid crystal display device is generally formed by appropriately combining a constituent element such as a liquid crystal element with an adhesive optical film and an illumination system used as appropriate, and then incorporated in a driving circuit or the like, in addition to the present invention. The optical film is not particularly limited, and can be carried out according to the prior art. Any type of material such as a TN type, an STN type, or a 兀 type can be used for the liquid crystal element. A crystal display device with an adhesive optical film disposed on one side or both sides of the liquid crystal element, and a suitable aa, and a device for using the backlight or the reflector in the illumination system can be formed. In this case, the optical film of the present invention may be disposed on one side or both sides of the liquid crystal 7L member. In the case where optical films are provided on both sides, the same may be the same or different. Further, when a liquid crystal display device is formed, one or two or more layers such as a diffusion plate, an anti-glare anti-reflection film, a protective plate, a matrix, a lens array, a light diffusion plate, and the like may be disposed at appropriate positions. 28 1302993 Suitable components for backlighting, etc. Next, Ge Ming was made for an organic electroluminescence device (organic EL display device). The optical film (polarizing plate, etc.) of the present invention can also be applied to an organic EL display. In general, an organic EL display device sequentially forms a transparent electrode, an organic light-emitting layer, and a metal electrode on a transparent substrate to form an illuminant (organic illuminator). Here, the organic light-emitting layer is a laminate of various organic thin films, and a laminate of a hole-embedded layer made of a triphenylamine derivative or the like and a light-emitting layer composed of a fluorescent organic solid such as a metal is known. a laminate of an electron-implanted layer composed of a body, a front light-emitting layer, a phthalocyanine derivative, or the like, or a stack of such a hole implant layer, a light-emitting layer, and an electron-implanted layer Various combinations. ,

The organic EL display device emits light based on the following principle. That is, an electromotive force is applied to the transparent metal t-electrode to implant a hole and an electron into the organic light-emitting layer, and the energy generated by the recombination of the holes and the electrons excites the light substance, and the excited fluorescent light is excited. The substance glows when it returns to the ground state. This mechanism is combined with the general diode in the middle, and it can be inferred that the intensity of the motor is different from that of the voltage applied to the applied voltage display in the organic EL display device. The light-emitting layer is guided to emit light, and at least the electrode on the side must be a transparent electrode. Usually, a transparent electrode formed of a transparent conductor such as indium tin oxide (TO) is used as an anode. On the other hand, in order to make electron implantation easier to improve luminous efficiency, it is important that the cathode uses a substance having a small work function, and a metal electrode such as Mg-Ag or A1_Li can be usually used. 29 1302993 In the above-mentioned organic EL display thousands of resident, ^ mussel is not installed, the organic light-emitting layer is thinner than l0nm Chenghu, hanging and enamel film formed. Therefore, the organic light-emitting layer and the transparent electrode can also be used to heat the Japanese white and completely penetrate. Therefore, the non-light-emitting device adheres to the surface of the transparent substrate, penetrates the transparent electrode and the organic light-emitting layer, and is reflected on the surface side of the transparent substrate before the metal electrode is reflected. Therefore, when viewed from the outside, The display surface of a device with a τ EL display device will be mirrored. In the organic EL display device in which the surface of the organic light-emitting layer that emits light by a voltage is provided with a transparent electrode, and the inner side of the organic light-emitting layer is made of metal (4), for example, it may be transparent. A polarizing plate is provided on the surface side of the electrode, and a phase difference plate is provided between the transparent electrode and the polarizing plate. The phase difference plate and the polarizing plate have a function of polarizing light which is incident from the outside and reflected by the metal private electrode. The polarizing effect can be confirmed as the mirror surface of the metal electrode from the outside, which is the effect thereof. In particular, the phase difference plate is formed by the 1/4 wavelength plate, and the polarization direction of the polarizing plate and the phase difference plate is formed. When the angle is adjusted to π/4, the mirror surface of the metal electrode can be completely shielded. That is, the external light incident on the organic EL display device can be penetrated by the polarizing plate only by the linear polarization component. The linear polarization is caused by the phase difference plate. Generally, it can be elliptically polarized. However, when the phase difference plate is a quarter-wave plate and the polarization direction of the polarizing plate and the phase difference plate is π/4, the circularly polarized light is 0. Will penetrate transparent substrate, transparent electrode, organic film,

30 1302993 is reflected on the metal electrode, penetrates the organic film, the transparent electrode, and the transparent substrate again, and becomes linearly polarized again on the phase difference plate. This linear polarized light cannot penetrate the polarizing plate because it is orthogonal to the polarizing direction of the polarizing plate. Thus, the mirror surface of the metal electrode can be completely shielded. EXAMPLES Hereinafter, the present invention will be specifically described based on examples, but the present invention is not limited to the examples. Also, the parts and % in each case are on a weight basis. (Measurement of Tg of Adhesive Layer) _ The Tg of the adhesive layer was determined by the DSC method. τ" is the starting temperature. The measuring device used was a DSC622(R) differential scanning calorimeter manufactured by Seiko Instruments. (Measurement of internal force (F) due to thermal stress of optical film) F = α · ΔΤ · E · 1 · h (where 'α is the thermal expansion coefficient of _6〇~23°C, and at is based on 23°C The temperature difference between the times, E is the modulus of elasticity, 1 is the width, and h is the thickness). The coefficient of thermal expansion α is obtained by the TMA method. The measuring device used was a TMA/SS6100 type thermomechanical analysis device manufactured by Seiko Instruments. The number of elastic sheets was determined by a tensile test performed by an automatic drawing AG-1 manufactured by Shimadzu Corporation. 1 · The cross-sectional area of the h-type optical film. Production Example 1 For a reaction vessel equipped with a condenser, a nitrogen introduction tube, a thermometer, and a stirring device, 99.9 parts of isooctyl acrylate, 2-hydroxyethyl hydrazine. 1 part, and 2,2, azobisisobutyronitrile were used. 3·3 parts were added together with ethyl acetate, and under the nitrogen gas stream, 6 (rc reaction for 4 hours, ethyl acetate was added to the reaction 31 1302993 solution to obtain an acrylic polymer solution having a solid concentration of 30 〇/〇. (The weight average molecular weight of the acrylic polymer is 1.75 million.) The solution contains 100 parts per gram of trimethylolpropane toluene diisocyanate and 0.01 parts of 3-glycidylpropyltrimethoxydecane per solid component. An acrylic pressure-sensitive adhesive was obtained. Next, the acrylic pressure-sensitive adhesive was applied to a seper composed of a polyester film surface-treated with a linaloone-based release agent, and allowed to stand at 150 ° C for 5 minutes. The heat treatment was carried out to obtain an adhesive layer having a thickness of 20 # m. The result of measuring the Tg of the adhesive layer was _62 Lu. C. This was used as the adhesive layer A. Production Example 2 For the condenser tube and the nitrogen introduction tube ,temperature And the reaction vessel of the stirring device, such that 99.9 parts of 2-ethylhexyl acrylate, 0.1 parts of 2-ethyl acrylate, and 2 parts of 2,2, azobisisobutyronitrile, 3 parts together with ethyl acetate After reacting for 4 hours at 6 ° C under a nitrogen gas stream, ethyl acetate was added to the reaction mixture to obtain an acrylic polymer solution having a solid concentration of 30% (the weight average molecular weight of the acrylic polymer was 700,000). _ The solution is blended with 0.15 parts of trimethylolpropane toluene diisocyanate and 0.01 parts of 3-glycidylpropyltrimethoxy decane per 100 parts of the solid component to obtain an acrylic adhesive. Secondly, this acrylic acid is obtained. The adhesive is applied to a seper composed of a polyester film surface-treated with an anthrone-based release agent at 150. (: 5 minutes of heat treatment to obtain an adhesive layer having a thickness of 20 // m) The result of measuring the Tg of the adhesive layer was -60 ° C. This was used as the adhesive layer B. Production Example 3 32 1302993 For a reaction vessel having a condenser tube, a nitrogen introduction tube, a thermometer, and a stirring device, acrylic acid 95 parts of ester, 5 parts of acrylic acid and 0.3 parts of 2,2'~ azobisisobutyronitrile were added together with ethyl acetate, and after reacting for 4 hours at 60 ° C under a nitrogen gas stream, ethyl acetate was added to the reaction liquid. An acrylic polymer solution having a solid concentration of 30% (weight average molecular weight of acrylic polymer of 2 million) was obtained. The solution was mixed with 0.6 parts of trishydroxylpropane phenylene diisocyanate and 0.075 per solid component. Part 3 - glycidylpropyltrimethoxydecane to obtain an acrylic adhesive. Secondly, the propionic acid-based adhesive is applied to a polyester film which has been surface-treated with a tantalum-based release agent. The spacer was heat-treated at 15 ° C for 5 minutes to obtain an adhesive layer having a thickness of 20 // m. The result of measuring the Tg of the adhesive layer was _3 (rc. This was used as the adhesive layer c. Production Example 4 Benzene peroxide was added to 100 parts of the fluorenone-based adhesive having a weight average molecular weight of 650,000. 2.0 parts of an anthrone-based adhesive which gives a 35% benzene solution. The 夂' is applied to a spacer composed of a polyester film surface-treated with an anthrone-based release agent. The adhesive layer was applied to a thickness of 20 #m at 15 rc for 5 minutes. The Tg of the adhesive layer was measured to be -120 ° C. This was used as the adhesive layer D. Production Example 5 Injury condensing tube, nitrogen inlet tube, thermometer reaction barn, so that 99 parts of butyl acrylate, 4 hydroxy acrylate, '2 azobisisobutyronitrile 〇 · 3 parts together with ethyl acetate were added under a nitrogen stream, After reacting at 6 ° C for 4 hours, 33 1302993 ethyl acetate was added to the reaction solution to obtain an acrylic polymer solution having a solid concentration of 30% (weight average molecular weight of the acrylic polymer was 1.65 million). 100 parts with 0.3 parts of benzoyl peroxide and 0.02 parts of methyl Propane xylene diisocyanate and 0.2 parts of 3-glycidyl propyl dimethoxy group were calcined to obtain a bismuth acrylate adhesive. Secondly, the acrylic acid-based adhesive was applied to an anthrone-based stripping agent. The agent is subjected to heat treatment at 155 ° C for 3 minutes at a temperature of 155 ° C to obtain an adhesive layer having a thickness of 20 / m. The result of measuring the Tg of the adhesive layer is - 38° (:. This is used as the adhesive layer E. Example 1 The adhesive layer A was attached to a polarizing plate (manufactured by Nitto Denko Corporation, NPF-SEG 5224DU) to obtain an adhesive optical film. The adhesive layer C was transferred to the surface of the adhesive layer A to obtain an adhesive optical film in which two adhesive layers were laminated. Further, the stretching axis of the polarizing plate was 9 Å. The service coefficient is a=5.3xl0-5(irc), the elastic modulus=3〇5xl〇9pa, the thickness=(8)#m, the width=270mm, and the calculation of the internal force (f) caused by heat shrinkage in 〇〇c Example 2 The adhesive layer B was attached to a single side of a polarizing plate (Nippon Electric Co., Ltd., NPF-SEG5224D U). X. Privately from the eight people, the adhesive layer C is attached to the B layer of the adhesive layer, and the adhesive film optical film with two layers of adhesive layers is obtained. 3 34 1302993 The adhesive layer D is attached to a single side of a polarizing plate (Nippon Electric Co., Ltd., NPF-SE (10) 24DU). Next, the adhesive layer c is attached to the surface of the adhesive layer D to obtain a laminate. Optical film of the layer of the adhesive layer. ~ Example 4 The above-mentioned adhesive layer A was attached to one side of a polarizing plate (Nippon Electric Co., Ltd. NPF-SEG5224DU). Next, the front (four) coating layer E was transferred to the surface of the adhesive layer A to obtain an optical film in which two layers of adhesive layers were laminated.实施 Example 5 Single side of NPF-SEG5224DU). Next, an optical film was laminated on the surface of the adhesive layer E. Reference Example 1 The adhesive layer E was attached to a polarizing plate (the adhesive attached to the adhesive layer C by the Nitto Denko Co., Ltd. was attached to the polarizing plate by the adhesive attached to the two adhesive layers) (Nitto Denko The single side of the company, NPF-SEG5224DU), was laminated with an adhesive film of i-layer adhesive layer. Reference Example 2 Manufactured by Jidong Electric Co., Ltd., attached with a layer of adhesive layer, the adhesive layer E was transferred to polarized light. On the single side of the plate (NPF-SEG5224DU), an adhesive optical film was laminated. Comparative Example 1 The adhesive layer c was attached to a single side of a polarizing plate (1302993 NPF-SEG5224DU manufactured by Nitto Denko Corporation) to obtain a laminated layer. (4) Adhesive-attached optical film of the coating layer. Comparative Example 2 The adhesive layer A was attached to a single side of a polarizing plate (Nippon Electric Co., Ltd., NPF-SEG 5224DU). Second, the adhesive layer b was attached to the adhesive layer b. On the side of the adhesive layer A, an adhesive optical film having two adhesive layers was laminated. Comparative Example 3 The adhesive layer C was transferred to one side of a polarizing plate (Nippon Electric Co., Ltd., NPF-SEG5224DU). Second, the aforementioned adhesives | a The adhesive film optical film was laminated on the surface of the adhesive layer C to obtain two adhesive layers. The adhesive film optical films obtained in the examples, the reference examples, and the comparative examples were evaluated as follows. 1. <Flexibility> The adhesive optical film was passed through its own adhesive layer to a thickness of 0.7 on a non-inspective glass plate having a thickness of 28 mm and 28 mm, at 50 C, 5 Place the pressure in a hot pressure cooker for 15 minutes to make a sample that has been fully pressed. The sample is subjected to the condition (1): generation, condition (2): 8〇C, condition (3): 6〇t, 9〇% rh After the enthalpy treatment in each ambient atmosphere, 'on the stage where the water is not embossed in the ambient atmosphere of 2rc and 55% RH', the amount of warpage at 4 points is measured using the gap gauge. The amount of the curvature is 4 points. The average 1 price benchmark is as follows: 〇: The amount of warpage of the glass is less than 0.5 mm. 36 1302993 △: The amount of warpage of the glass is 〇5~1 〇. X. The warpage of the glass exceeds 丨〇mm <Durability> The same sample as above is subjected to the condition (1): -40X: condition (2): ah, condition..., ^ state After careful treatment in each of the environmental atmospheres, the results are evaluated as follows. 〇: No foaming or peeling is determined. △: Foaming and peeling are determined. However, it does not affect the visibility. X: It is considered to have foaming and peeling, and it affects the visibility. <adhesiveness of the side, viscous> The adhesive optical film is punched into a square having a side length of 270 nm. The one piece is overlapped, and the laminated body is held by the jig held up and down. 100 pieces of the laminated body (one polarizing plate in total) are individually bundled, transported by a truck or the like, and then unsealed. The operator observes by visual inspection and hand contact to compare with the bale, and confirms that there is no stickiness on the side of the polarizing plate. It is also judged whether the surface of the polarizing plate is dirty due to the adhesive. The evaluation criteria are as follows. (Feeling on the side) 〇: 0 of 100 pieces have a sticky feeling. △ : 1 to 5 of 100 tablets have a sticky feeling. X: More than 5 of the 100 tablets have a sticky feeling. (mud residue) 〇: 0 of 100 tablets have slag.

37 1302993 △ : 1 to 5 of 100 tablets have slag. X ·· More than 5 of 100 tablets have slag.

38 1302993

[II Working scum 〇〇〇<3 〇X < XXX Adhesive 〇〇〇< 〇X < XXX For long-term conditions (3): 60°C, 90%RH x500 hours〇〇〇〇 〇< 〇〇X < Condition (2): 80°C×500 hours 〇〇〇〇〇<] 〇〇X < Condition (1): -40°Cx500 hours 〇〇〇〇〇〇〇〇〇〇Wei volume condition (3): 60 °C '90%RH x48 hours 〇〇〇〇<〇< X 〇〇 condition (2): 80 °C x 48 hours 〇〇〇〇 < 〇 < X 〇〇 condition (1): - 40°C×48 hours〇〇〇〇<: 〇<1 X 〇〇 Heavy class: Tg(〇C) Adhesive layer (a) C : -30°CC : -30°c C : -30°CE : -38〇CC : -30°C 1 1 1 B : -60°CA : -62〇C Adhesive layer (b) A : -62〇CB : -60°CD : -120°C :-62〇C :-38〇C :-60°c :-38〇C :-30°c :-62〇C :-30°CC PQ wu < U Example 1 Example 2 Example 3 Example 4 Example 5 Reference Example 1 Reference Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 1302993 [Simple Description of the Drawing] Fig. 1 An exemplary cross section of an optical film of the invention attached to the adhesive. [Explanation of main component symbols] 1 Optical film 2 (a) Adhesive layer (a) 2 (b) Adhesive layer (b) 3 Release sheet Industrial applicability The adhesive optical film of the present invention can be applied to The stretched film is used as an optical film, and can be applied to an image display device such as a liquid crystal display device, an organic EL display device, or a PDP.

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Claims (1)

1302993 X. Patent application scope: 1 · Adhesive optical film with adhesive layer on at least one side of the optical film; characterized in that the adhesive layer has at least two adhesive layers; Tg55t of the far adhesive layer (a): above; Tgnc of the adhesive layer (b) closest to the optical film; Tg of the adhesive layer (a) is higher than the Tg of the adhesive layer (b). 2. The adhesive optical film according to the ninth aspect of the invention, wherein the difference between the Tg of the adhesive layer (1) and the adhesive layer (1) t Tg is replaced by the above. 3. The adhesive optical film according to the invention of claim 4, wherein the internal force (F) of the optical film due to thermal stress is defined as F = α · ΔΤ - E · 1 · h (where α The thermal expansion coefficient of -60 to 23 C, Δτ is the temperature difference when 23 〇c is used as the reference, the value is the elastic modulus, i is the width, and h is the thickness), the optical film has a stretched film, and at ot The stretching axis of the stretched film was 9 〇. The internal force (F) generated in the direction is 50N or more. 4. The adhesive optical film according to claim 2, wherein the internal force (F) of the optical film due to thermal stress is defined as ', F = · ΔΤ · E - 1 - h (where α It is -60~23. The thermal expansion coefficient of 匚, Δτ is the temperature difference when Μ is the reference, Ε is the elastic modulus, ! is the width, h: the optical film has the stretched film, and the stretch of the stretched film in crc The internal force (F) generated is 50 N or more. 1302993 5. The adhesive optical film of claim 1, wherein the optical film comprises a polarizing plate and/or a phase difference plate. The adhesive optical film of the second aspect of the invention, wherein the optical film comprises a polarizing plate and/or a phase difference plate. 7. The adhesive optical film of claim 3, wherein the optical film contains polarized light The plate and/or the phase difference plate. 8. The adhesive optical film according to item 4 of the patent application, wherein the optical film comprises a polarizing plate and/or a phase difference plate. It is characterized by the use of Articles 1 to 8 of the scope of application for patents. Adhesive optical film is attached at least one item of Η ^ a, drawings: Page summarized as follows 42