TW201136999A - Polarizing plate - Google Patents

Abstract

The present invention provides a polarizing plate containing transparent resin films laminated respectively by adhesive on two sides of a polarizing film comprising polyvinyl alcohol resin. The water vapor transmission rates of the transparent resin films laminated on two sides are less than 50g/m2 day at 40 DEG C. Moreover, at least one of two transparent resin films laminated on two sides is a polypropylene resin film that contains an ultraviolet absorber having a molecular weight of greater than 450 with a content of greater than 0.1 wt% and less than 1.5 wt%.

Description

[Technical Field] The present invention relates to a polarizing plate in which a polypropylene resin film is laminated on at least one surface of a polarizing film containing a polyvinyl alcohol resin. [Prior Art] The polarizing plate is one of important constituent members of a liquid crystal display device such as a liquid crystal television, a liquid crystal monitor, or a personal computer. The polarizing plate is generally configured to be laminated on a single side or both sides of a polarizing film containing a polyvinyl alcohol-based resin to which a dichroic dye is adsorbed, via a pressure-sensitive adhesive layer, for example, cellulose acetate represented by triethyl fluorene cellulose. A protective film. In the case where a retardation film such as a norbornene-based resin is laminated on one surface of the polarizing film via an adhesive, a hydrophilic protective film such as a triacetyl cellulose film or the like is used right. Sometimes, under the conditions of high temperature and high humidity, the water content of the polarizing film containing the polyethylene-based resin is affected and the performance of the polarizing plate is also somewhat changed. Therefore, research is being conducted on a polarizing plate using a protective film containing a hydrophobic resin such as a polypropylene resin instead of a hydrophilic resin, and (4) suppressing the influence depending on the environment (Japanese Patent Laid-Open No. -258588) Wait). - On the other hand, the polarizing plate also has the function of protecting the liquid crystal cell in the liquid crystal display device from light damage, and is more connected; the ultraviolet absorbing agent is added to the protective film # laminated on the polarizing film to impart a cut to the Reduce the power of the ultraviolet light at 400 nmw t*. However, if the ultraviolet absorbing 154525.doc 201136999 agent is added to the ruthenium film containing the polypropylene resin as described in the above-mentioned Japanese 蚩 蚩 丨 na (4) (4) No. 9258588, it is possible that the ultraviolet absorber is in contact with the adhesive. The interface of the layer oozes and accumulates, resulting in a decrease in the adhesion strength between the protective ruthenium and the polarizing film. SUMMARY OF THE INVENTION An object of the present invention is to provide a polarizing plate which is formed by laminating at least one surface of a polarizing film via an adhesive layer, and a polypropylene resin film which imparts ultraviolet light reducing performance by adding an ultraviolet absorber. And the adhesive strength between the polypropylene resin film and the polarizing film is sufficiently high. In order to solve the above problems, the present invention provides a polarizing plate which is bonded to a transparent resin film which is adhered to both surfaces via an adhesive on both surfaces of a polarizing film containing a polyethylene resin, and which is bonded to both surfaces. Film 4 (the water vapor permeability under rc is 50 g/m2.day or less, and at least one of the transparent resin films bonded to both surfaces is contained in an amount of not more than 15% by weight. A polypropylene-based resin film having an ultraviolet absorber having a molecular weight of 450 or more. According to the present invention, it is possible to provide a polypropylene resin film and a polarizing film with high adhesion strength and excellent ultraviolet light-reducing performance, and the polarizing film is caused by the use environment. The liquid crystal display device of the polarizing plate of the present invention is excellent in durability and excellent in display performance. [Embodiment] <Polarizing Plate> The polarizing plate of the present invention comprises: a polarizing film comprising a polyvinyl alcohol-based resin and a transparent resin film which is bonded to both surfaces of the polarizing film via an adhesive layer and which exhibits a specific water vapor permeability. At least one of the transparent resin films is a polypropylene resin film containing 154525.doc 201136999 having an ultraviolet absorber having a molecular weight of 450 or more in an amount of not more than 1% by weight and less than 1.5% by weight. (Polarizing film) The present invention The polarizing film used in the polarizing plate is specifically obtained by adsorbing a dichroic dye to a uniaxially stretched polyvinyl alcohol resin film. The polyvinyl alcohol resin can be saponified by polyvinyl acetate vinegar. A resin obtained by using a resin, in addition to polyvinyl acetate, which is a homopolymer of ethylene vinegar, may also be a copolymer of vinyl acetate and other monomers copolymerizable therewith, such as ethylene. - a vinyl acetate copolymer, etc. Examples of other monomers copolymerizable with vinyl acetate include unsaturated carboxylic acids, olefins such as ethylene, vinyl ethers, unsaturated sulfonic acids, and The saponification degree of the polyvinyl alcohol-based resin is usually 85 to 1 〇〇 mol%, preferably 98 mol/〇 or more. The polyethylene glycol resin may also be modified, for example, Use The modified polyethylene formaldehyde, polyvinyl acetal, polyvinyl butyral, etc. The degree of polymerization of the polyvinyl alcohol resin is usually in the range of 1000 to 10000, preferably in the range of 1500 to 5000. The method of forming a polyvinyl alcohol-based resin film is not particularly limited, and a film can be formed by a conventionally known method. A roll comprising a polyvinyl alcohol-based resin can be used. The film thickness of the film is not particularly limited, and is, for example, about 1 〇 to 15 〇. The polarizing film is usually produced by the following steps: a step of dyeing and diluting the dichroic dye by a dichroic resin film (miscellaneous) Color treatment step); a step of treating the alcohol-based resin film by adsorbing the dichroic dye on the aqueous solution (boric acid treatment step); and benefit 154525.doc 201136999 Step of washing with the aqueous solution of the aqueous acid acid and washing with water (washing treatment) step). In the case of producing a polarizing film, a polyethylene resin film is generally used to carry out a green axis extension, but the uniaxial stretching may be performed before the dyeing treatment step, or during the dyeing treatment step, or in the dyeing treatment step. After that. In the case of the dyeing treatment step # gg ^ ^ ▲ I stupidly extend the soap axis, the uniaxial extension can be carried out before the treatment step, or during the acid treatment step. Of course, uniaxial stretching can also be performed in a plurality of stages. The uniaxial extension can be extended in a single axis at different circumferential speeds, and can also be extended in a single axis using a heat roller. x may be a dry extension which is extended in the air, or may be a wet extension in which the polyethylene resin film is swollen by a solvent. The stretching ratio is usually about 3 to 8 times. The dyeing of the polyvinyl alcohol-based resin film in the dyeing treatment step by the dichroic dye is carried out, for example, by impregnating the polyvinyl alcohol-based resin film in an aqueous solution containing a dichroic dye. As the coloring dye, for example, a moth/4 dye or the like can be used. The dichroic dye includes, for example, a dichroic direct dye such as a dichromatic direct dye, a tris-azo compound or a tetrazo compound, which contains a disazo compound such as C丄 DIRECT RED 39 (C.I. direct infrared). Further, the polyvinyl alcohol-based resin film is preferably subjected to a treatment of immersion in water before the dyeing treatment. When a dichroic dye is used, it is usually used by impregnating and drying a polyethylene glycol-based resin film in an aqueous solution containing moths and hydrazine. The content of iodine in the aqueous solution is usually 0.01 to 1 part by weight per 1 part by weight of water, and the content of hydrazine is usually 0.5% per 1 part by weight of I54525.doc 201136999. ~20 parts by weight. In the case where iodine is used as the dichroic dye, the temperature of the aqueous solution used for dyeing is usually 20 to 40. (:, again, the time (dyeing time) of immersion in the aqueous solution is usually 20 to 18 sec. On the other hand, when a dichroic dye is used for the dichroic dye, it is usually used to contain two colors. A method of impregnating and dyeing a polyvinyl alcohol-based resin film in an aqueous solution of a dye. The content of the dichroic dye in the aqueous solution is usually from 1 x 10-4 to 10 parts by weight per 100 parts by weight of water, preferably. It is 1×10•1 part by weight, and particularly preferably lxl0·3~lxl·2 parts by weight. The aqueous solution may also contain an inorganic salt such as sodium sulfate as a dyeing assistant. When a dichroic dye is used for the dichroic dye The temperature of the dye aqueous solution used for dyeing is usually 20 to 80 ° C. Further, the time (dyeing time) of impregnation in the aqueous solution is usually 10 to 1800 seconds. The boric acid treatment step is to utilize dichroism. The polyvinyl alcohol-based resin film dyed with the dye is impregnated in the aqueous solution containing boric acid, and the amount of boric acid in the aqueous solution containing boric acid is usually 2 to 15 parts by weight, preferably 5 to 12 parts per 100 parts by weight of water. Parts by weight. In the case where iodine is used for the dichroic dye, it is preferred that the boric acid-containing aqueous solution used in the boric acid treatment step contains potassium iodide. In this case, the amount of potassium iodide in the boric acid-containing aqueous solution is relative to 100 parts by weight of water. Typically, it is 〇m by weight, preferably 5 to 12 parts by weight. The time of impregnation in the aqueous solution containing boric acid is usually 60 to sub-second, preferably 15 〇 to _ second, and more preferably fan to sec. The temperature of the aqueous solution containing boric acid is usually 5 〇t or more, 50 to 85 ° C, more preferably 60 to 8 (TC.) In the subsequent washing step, the borage is treated by the above boric acid 154525.doc 201136999 The ethylene glycol-based resin film is immersed in, for example, water to perform a water washing treatment. The temperature of the water in the water washing treatment is usually 5 to 4 〇 ° C, and the immersion time is usually 20 seconds. After the water washing treatment, drying is usually carried out. A polarizing film is obtained. For the drying treatment, for example, a hot air dryer, a far-infrared heater or the like can be preferably used. The temperature of the drying treatment is usually 3 〇 to 1 〇〇〇 c, preferably 5 〇 to 8 〇 t > The drying time is usually 6〇~6〇 In the second embodiment, the polyvinyl alcohol-based resin film is subjected to uniaxial stretching, dyeing with a dichroic dye, boric acid treatment, and water washing treatment to obtain a polarizing film. The thickness of the polarizing film is usually (transparent resin film) The transparent resin film bonded to both surfaces of the above polarizing film may be a film containing the same resin material or a film containing different kinds of resin materials, and the two may be transparent. (2) The resin film having a water vapor permeability of % g/m2.day or less is used for any of the resin films. The water vapor transmission rate is preferably 10 g/m2.day or less. The influence of moisture on the polarizing film due to the use environment, and the long-term stability of the optical characteristics of the obtained polarizing plate can be imparted. The water vapor transmission rate at 3 〇C was measured in accordance with JIS Z 0208. That is, the water vapor transmission rate at 40 ° C is based on the sample material under the temperature thief, and when the air on one side is the relative humidity of 9〇%, the air on the other side is kept dry by the moisture absorbent. In the state of 'measured as 24 hours/days, the mass ω of the water vapor passing through the boundary surface is converted into the value of the sample film per im2. " The transparent resin film may be a protective film for protecting the polarizing film, or may be a retardation film imparting a specific phase difference. In the present invention, at least one of the transparent resin films bonded to both surfaces of the polarizing film is a polypropylene resin film containing a UV absorber of a specific molecular weight. The other transparent resin film is not particularly limited as long as it has a water vapor permeability of 5 〇g/m2.day or less, and may be a polypropylene resin film or another resin film. A norbornene-based resin film containing a constituent unit derived from a cycloolefin monomer; a polycarbonate resin film, a polyester resin film; a polystyrene resin film; an acrylic resin film; 4-methyl group A polyolefin-based resin film other than the polypropylene-based resin film, such as a 1-pentene-based resin film. One of the preferred embodiments of the polarizing plate of the present invention is attached to one surface of the polarizing film via an adhesive layer. It is a protective film having a polypropylene resin film having a molecular weight of 450 or more and a polypropylene resin film having a molecular weight of 450 or more, and a norbornene adhered to the other surface via an adhesive layer. In the resin film, a norbornene-based resin film is used for one transparent resin film to impart rigidity to the polarizing plate. The norbornene-based resin film is preferably subjected to uniaxial or biaxial stretching treatment. Polypropylene resin containing ultraviolet absorber The transparent resin film which is bonded to at least one surface of the polarizing film is a polypropylene resin film containing an ultraviolet absorber having a molecular weight of 45 Å or more in an amount of not more than 0.1% by weight and not more than 1.5% by weight. The ultraviolet absorber is less likely to bleed out from the polypropylene resin film and can retain a specific amount of the ultraviolet absorber in the film, thereby improving the adhesion strength between the polypropylene resin film and the polarizing film and imparting polarized light. The polypropylene resin film can be a protective film or a phase difference of 154525.doc -9- 201136999 film, etc. The molecular weight of the ultraviolet absorber is preferably 480 or more, and the ruler 1 is more than 50 〇. Further, the molecular weight of the ultraviolet absorber is preferably 12 Å or less. When the molecular weight exceeds 12 GG', the compatibility with the polypropylene resin is a problem and there is a possibility that the transparency is impaired. In the case of the above, it is also possible to use an ultraviolet absorber containing an oligomer or a polymer having a molecular weight exceeding the employed amount. For the ultraviolet absorber of 45 〇 or more, a hydroxybenzophenone-based, a hydroxybenzotriazole-based, or a hydroxy-trisole-based ultraviolet absorber can be used. Among these, a polypropylene-based resin film and a polarizing film are used. In terms of adhesion strength, it is more advantageous to form a hydrogen bond between a benzoic acid and a hydroxyl group, a benzotriazine system, a (four) three ρ well line absorber, and a specific use of the preferred ultraviolet absorber. For example, 2,2,-extended ethyl bis[6·(2ηbenzotriazol-2-yl)-4-(1,1,3,3_) as a hydroxybenzotriazole system is exemplified. Tetramethyl butyl phenol], hydroxy tritonate, etc. The amount of the ultraviolet absorbing agent having a molecular weight of 450 or more is in the polypropylene resin film (M% by weight or more and less than L5% by weight β is less than the added amount) In the case of % by weight, the ultraviolet ray reducing performance is insufficient, and when it is more than 15% by weight, the adhesion strength is lowered due to bleed out from the polypropylene resin film and the appearance of the film may be impaired. The amount of the ultraviolet absorber to be added is preferably 0 2 to 12 parts by weight in the polypropylene resin film. Further, in order to adjust the ultraviolet ray reducing performance of the polarizing plate, an ultraviolet absorbing agent having a molecular weight of less than 45 Å may be used together with the ultraviolet absorbing agent having a molecular weight of 154525.doc •10·201136999 450 or more. In this case, the amount of the ultraviolet absorber to which the molecular weight is less than 45 Å is preferably 3% by weight or less based on 5% of the polypropylene resin film. When the amount is more than 0.3% by weight, the adhesion strength between the polypropylene resin film and the polarizing film may be lowered. Examples of the polypropylene-based resin constituting the polypropylene-based resin film include a random copolymer of propylene and another monomer copolymerizable therewith, such as ethylene or a heart olefin, and various copolymers including a di-TG copolymer or a block copolymer. A homopolymer of propylene. The α-olefin is an olefin having a carbon number of 4 or more, preferably a carbon number of 4 to 1. Specific examples of the α-olefin having 4 to 10 carbon atoms are, for example, straight-bonded monoolefins such as butene, 1-pentene, 1-hexene, 1-heptene, octene, and decene. a branched monoolefin such as 3-mercapto-1-butene, 3·methyl-丨-pentene, 4·methyl· _pentene or the like; ethylene cyclohexane or the like. In the present invention, among the above, from the viewpoint of resin transparency, a random copolymer of propylene and another monomer copolymerizable therewith or a homopolymer of propylene is preferably used. Among the random copolymers, a propylene/ethylene random copolymer or a propylene/1-butene random copolymer is more preferably used. It is also preferred to use a resin composition in which two or more kinds of polypropylene resins selected from the group consisting of a random copolymer and a homopolymer of propylene are used. From the viewpoint of ease of formation on the film, the polypropylene resin is preferably uo g/ at a temperature of 23 (TC, a load flow rate of 21.18 nt, measured at a temperature of 23 according to JIS K 7210). In the range of 1 〇 比, more preferably in the range of 2 to 18 g/10 min, and further preferably 4 to 15 g/i 〇 min 〇 154525.doc 201136999 Polypropylene resin can be used for known polymerization. The polymer or copolymer which is polymerized by a catalyst is, for example, a catalyst for polymerization. [i] A Ti-Mg catalyst containing a solid catalyst component containing a town, a chroman, and a functional component as essential components. In the middle, a catalyst system in which a first component such as an organoaluminum compound and an electron-donating compound are optionally added; ΠΠ] a metallocene-based catalyst, etc. The polypropylene-based resin can be used, for example, by using, for example, hexane or heptane. Xinyi Shaozhuan, cyclohexanol, methylcyclohexyl, benzene, toluene, xylene, etc.: Hydrocarbon: a solution polymerization method represented by an inert solvent, and a block polymerization method using a liquid as a solvent In order to make the gas 'method' and so on, and H _ reduce the body of the body directly to the gas phase of the gas mixture to 1 ^. Li (four), etc. The polymerization of the method is carried out in a continuous manner. In the range of not inhibiting the effects of the present invention, additives other than the external line absorbent in the above-mentioned ultraviolet sputum can be formulated. For example, an antioxidant, an anti-fogging agent, an anti-caking agent, a neutralizing agent, etc., a T agent, a nucleating species, and an additive may be used together as an antioxidant, and for example, (4) ^, sulfur-based antioxidants, hindered amine-based light stabilizers, and dish-based anti-oxidants. For example, a composite antioxidant/oxidation mechanism and a squamous antioxidant in one molecule, or a mechanism of 4 mechanisms. The agent may be any of the polymerized 154525.doc oligomer type or monomer type. -12- 201136999 As the lubricant, high-grade fatty acid such as fentanic acid or oleic acid, such as decylamine or stearic acid, may be mentioned. A fatty acid, a salt thereof, etc. As the anti-caking agent, inorganic or organic spherical or nearly spherical microparticles can be used. Among the above-exemplified additives, the effect of the present invention is not hindered and the polypropylene is exemplified. Resin film system For the additive which can be used to suppress deterioration of the polypropylene resin in the process, "SUmilizer GP" sold by Sumitomo Chemical Co., Ltd., "kg-pi68", "Ifganox l076", and "Irgan〇" sold by Shinsei Co., Ltd. are mentioned. Antioxidant such as x 1〇1〇”; neutralizing agent such as hydrotalcite, hydroxide, or oxyhydroxide. The preferred amount of antioxidant in the polypropylene resin film is 〇〇1% by weight or more 2 The amount of the neutralizing agent to be added is preferably 〇, 〇〇 1% by weight or more 〇〇 1% by weight or less. The nucleating agent may be any of an inorganic nucleating agent and an organic nucleating agent. Examples of the inorganic nucleating agent include talc, viscous, barium carbonate and the like. Further, examples of the organic nucleating agent include metal salts such as metal salts of aromatic acid-removing metals and metal salts of aromatic phosphoric acid, high-density polyethylene, and poly-3 methyl-buty H'-polycyclic rings. Pentene, polyvinylcyclohexene, and the like. Among these, 'preferably, (four) into _' is more preferably the above metal salt and high density polyethylene. The amount of the nucleating agent added to the polypropylene (iv) lipid film is preferably from 0.001 to 3% by weight, more preferably from 0.05 to 1.5% by weight. A polypropylene-based resin film containing a UV-absorbing sword can be produced by the following melt extrusion molding method. After the resin blended with the ultraviolet absorber and other additives as needed, the resin is melted and kneaded by an extruder. Mold 154525.doc 201136999 The head is extruded and cooled by a chill roll. Here, as a method of putting a polypropylene resin and an ultraviolet absorber into an extruder, a method can be employed: Π] a polypropylene resin and a UV absorber which are previously mixed with a pellet or a powder in a specific composition ratio. a method of inputting in the form of a polypropylene resin mixture; [H] separately metering granules or powdery polypropylene resin and ultraviolet absorbing agent into a funnel of an extruder by using a screw feeder or a weight feeder, respectively. In the method, [Hi] additionally prepares polypropylene resin particles (masterbatch) containing the ultraviolet absorber at a concentration higher than the amount of the ultraviolet absorber which should be contained in the polypropylene resin film, and the master batch is polypropylene. a method in which a resin is mixed into a desired ultraviolet absorber concentration, and then introduced into an extruder, [iv] a method of separately metering separately prepared master batch and polypropylene resin particles and separately feeding them into a funnel of an extruder Wait. Among these methods, in terms of excellent dispersibility of the ultraviolet absorber in the polypropylene resin film and excellent in production efficiency, it is preferred to use a method of [Πί].

In terms of operating costs, 154525.doc can be used in terms of nitrogen (Ν2), argon (Ar), and 氦^, preferably nitrogen 201136999 (NO. The purity of the inert gas is preferably 99 8 vol% or more. From the viewpoint of preventing oxidative degradation of 99 vol% or more and λ ', it is preferred that the polypropylene resin (usually granules) charged into the extruder is sufficiently maintained in an inert gas atmosphere in advance. The film is preferably excellent in transparency. Specifically, the turbidity measured according to 7136 is preferably 〇50/^, and if the turbidity is exceeded, the & crystal display device of the invention<> The radiance of the polypropylene resin film is more preferably 3% to 3%. ^ In order to make the turbidity of the polypropylene resin film within the above range, it is also dependent on the reinforcement during the melt extrusion molding. The speed or the diameter of the cooling roll is preferably a molten sheet-like polypropylene resin which is suddenly cooled by the temperature of the cooling roll during use in the cold portion of the partial roll. At this time, the (four) U-like flaky polypropylene resin is adhered to the cooling. The method of reporting may sometimes affect the turbidity of the obtained polypropylene resin film. If a preferred form of the method in which the polypropylene-based resin in the form of a filament-like sheet is adhered to the cooling roll is exemplified, for example, _(4) The flaky polypropylene (IV) resin imparts static electricity to the surface of the mirror surface of the cooling roll and is cooled; 、) f smelting; | sheet-like poly propylene resin is pressed on the surface state is mirror cold a method in which the light and surface state is a mirror-like elastically deformable metal roll or metal transport V, which is adhered to cooling to reduce cooling; the sheet-like polypropylene resin is torn, by the gas chamber method, densely A method of cooling a cooling roll having a surface of a semi-matte surface and cooling it. 154525.doc 15 201136999 Face: 'The adhesion strength of the polypropylene-based resin film and the polarizing film. The adhesion method using the gas chamber method is also advantageous.斤: The air chamber method of the above e) is a method in which a gas is placed on a cooling roll along a film contact point of a cooling roll.虱到法中' 4 Preventing the shrinkage of the edge of the film or ensuring the stability of the edge. It is better to use an air nozzle to seal the edge of the film compared to other parts.” 7 rolls can also replace the air. The nozzle uses a nozzle that is electrostatically fixed to the cooling roller by static electricity rather than air. The pressure in the rolling chamber is preferably 3 〇〇 Pa or less, more preferably 2 〇〇 pa or less. If it exceeds 300 pa', the air flows out to the outside of the air chamber, and the extruded molten sheet-like polypropylene material and the resin are shaken, and the thickness precision of the film may be lowered. The chill roll used in the gas chamber method is not a mirror roll, and is preferably a half-faced cooling roll. Specifically, the basis of the cooling roll; the surface roughness (maximum degree Rmax) of 18 B 〇6〇1 is preferably 〇·5~2 μηη, more preferably Hi 5 μιη. When the surface roughness (Rmax) is less than 〇5 μιη', when air is intruded between the molten sheet-like polypropylene resin and the cooling roll, the air does not leak out, thereby generating the surface of the polypropylene resin film. Bumps may cause poor appearance. Further, when the surface roughness (Rmax) exceeds 2 μm, the unevenness of the surface of the cooling roll is transferred to the surface of the polypropylene resin film by adhering to the cooling roll, which may cause appearance defects. Further, from the viewpoint of the rough surface roughness and transparency of the obtained polypropylene resin film, the surface state of the cooling crucible is preferably a satin-finished surface. The thickness of the polypropylene resin film is preferably about 3 to 200 μm, more preferably 1 〇 154525.doc • 16 · 201136999 μηι to 150 μιη or less. Further, the thickness accuracy thereof is preferably ±5% or less of the center value of each of the film in the longitudinal direction and the width direction, more preferably ±3% or less of the center value. (2) Norbornene-based resin film The norbornene-based resin film used in the above preferred embodiment contains a cycloolefin (cyclic olefin) derived from a norbornene or a polycyclic norbornene-based monomer. A film of a thermoplastic resin of a unit. The norbornene-based resin film may be a cyclic olefin and a chain olefin, and may be a hydride of a ring-opening polymer of the above cyclic olefin or an argon compound of a ring-opening copolymer of two or more kinds of cyclic olefins. Or an addition copolymer having an aromatic compound such as a vinyl group. Moreover, it is also effective for introducing a polar base. In the case of using a copolymer of a cyclic olefin and a chain olefin and/or an aromatic compound having a vinyl group, examples of the chain-like hydrocarbon include acetamidine, propylene, etc., and, as an aromatic compound having a vinyl group. Examples thereof include styrene, α-methylstyrene, and a core alkyl-substituted styrene. In the above copolymer, the content of the constituent unit derived from the cyclic olefin may be 5 〇 mol% or less (preferably 15 to 50 mol% especially for the preparation of a cyclic olefin, a chain olefin, and a vinyl group). In the case of a terpolymer of an aromatic compound, the ring-derived hydrocarbon-derived fresh element may be set to a relatively small amount as described above in the terpolymer. The content is usually 5, and the content of the constituent unit derived from the aromatic compound having an ethylene group is usually 5 to 80 mol%. "As a norborne maternity resin, a suitable sales product can be preferably used. For example, Topasj (Topas Advanced p〇) is manufactured by ymers GmbH & 154525.doc 17 201136999 ARTON j (manufactured by JSR Co., Ltd.), "ZEONOR (ZEONOR)" (manufactured by Sakamoto Co., Ltd.), "ZEONEX (" ZEONEX)" (manufactured by Sakamoto Co., Ltd.), "APEL" (manufactured by Mitsui Chemicals, Inc.), etc. When the norbornene-based resin film is formed and used as a film, a solvent casting method or a squeezing method can be suitably used. Press into For example, "s_SINA" (made by Sekisui Chemical Co., Ltd.), "sCA4〇" (made by Sekisui Chemical Industry Co., Ltd.), r ZE〇nOR Film" (曰本ΖΕΟΝ) A product of a film-formed norbornene-based resin film, such as "manufactured by Co., Ltd." and "ART〇N Fi丨m" (manufactured by JSR Co., Ltd.). The norbornene-based resin film may be extended at least in one direction. The optical compensation energy (viewing angle compensation energy) of the liquid crystal is applied to form a retardation film. By applying a polarizing plate having the above-described extended norbornene-based resin film to a liquid crystal display device, the viewing angle of the liquid crystal display device can be expanded. The norbornene-based resin film of the retardation film has a refractive index of ～ in the direction of the slow axis in the plane of the film, and a refractive index of ny and a direction in which the in-plane is orthogonal to the direction (in the direction of the phase axis). When the refractive index in the thickness direction is I and the thickness of the film is d, the in-plane retardation value of the film represented by the following formula (1) is preferably 4 〇 to 1 〇〇 nm (more preferably 40 to 80). Within the range of nm) Of formula (11) in the thickness direction retardation value Rth in the range of 80~300 nm (nm, more preferably 1〇〇~25〇) of. R〇 = (nx-ny) xd ⑴

Rth=[(nx+ ny)/2-nz]xd (π) When the in-plane phase difference R〇 is less than 4〇nm or exceeds 1〇〇, there is a tendency for the viewing angle compensation energy of the polarizing plate to decrease. . Further, in the case where the thickness difference 154525.doc 201136999 is less than 80 nm or more than 300 nm, there is still a tendency that the viewing angle compensation energy of the polarizing plate is lowered. Further, the in-plane phase difference value R〇 and the thickness direction phase difference value Rth can be measured, for example, using "k〇BRa 21ADH" (manufactured by Oji Scientific Instruments Co., Ltd.). In order to obtain the norbornene-based resin film having the refractive index characteristics represented by the above formulas (I) and (II), in addition to appropriately adjusting the stretching ratio and the stretching speed, the preheating temperature, the elongation temperature, and the heat setting at the time of stretching are appropriately selected. Various temperatures such as temperature and cooling temperature and their temperature setting modes are sufficient. The stretching was carried out under relatively slow conditions, whereby the refractive index characteristics as described above were obtained. For example, the stretching ratio is preferably in the range of 1 '05 times or more and 1.6 times or less, more preferably 1H^ or more and 1.5 times or less. In the case of biaxial stretching, the stretching ratio of the maximum extension direction may be within the above range. The thickness of the norbornene-based resin film to be stretched is preferably in the range of 2 Å to 8 Å, more preferably 40 to 80 μm. When the thickness of the extended norbornene-based resin film is less than 20 μη, the operation of the film is difficult and it is difficult to express the characteristic; the tendency of the phase difference of t. On the other hand, when the thickness of the lipid film of the borneol is more than 80 μm, the workability is poor, and the transparency is lowered or the weight of the obtained polarizing plate is increased. (Adhesive layer) As an adhesive for bonding the above-mentioned transparent resin film to the polarizing film, a water-based lacing agent, that is, an adhesive component is dissolved in water, from the viewpoint of thinning the adhesive layer. Or an adhesive dispersed in water, and a photo-curable adhesive which is hardened by irradiation with an active energy ray. Among them, from the viewpoint of the adhesion strength between the transparent resin film and the polarizing film, it is preferred to use a photocurable adhesive for 154525.doc 201136999. Used for laminating - to stick the s ^ permeable resin film adhesive and paste. The adhesive agent of the other transparent resin film may be the same adhesive used for different kinds. The agent may also be: a photo-curable adhesive', for example, an epoxy resin group containing light such as a photocationic polymerization initiator; preferably, the above-mentioned polyacrylic acid containing a specific ultraviolet absorber: In terms of the adhesive strength of the film, the epoxy resin composition is extremely useful as a photocurable epoxy resin. For example, a cycloaliphatic epoxidation may be preferred. 3,4-epoxycyclohexanecarboxylic acid may be mentioned. 3,4_epoxycyclohexylformamidine epoxy-4·ethethylene cyclohexene, u_epoxy small methyl o-^ epoxy ethyl) cyclohexane, acrylic acid 3,4·epoxy 4·(1′2_epoxyethyl)], 2_epoxycyclohexylamine adduct of cyclohexylmethyl acetoacetate, 2,2 bis-methylol)butanol: double (3,4_ Epoxy ring hexane (4)) Ethyl vinegar, double (3,4_epoxy ring hexanic acid) Oxygen diethylene glycol, bis (3,4-epoxy cyclohexyl sulphate) 环•环己炫Dimethyl vinegar, epoxidized cyclohexene (IV) is called 3,4•epoxycyclohexylmethoxymethyl propyl vinegar and the like. Examples of the photo-curable epoxy compound other than the alicyclic epoxy compound include a glycidyl ether compound having a hydroxyl group-containing aromatic compound or a chain compound, a glycidylamine compound having an amine group, and a C double An epoxide of a chain compound of a bond, an oligomer thereof, or the like. The alicyclic epoxy compound and the photo-curing epoxy compound other than the alicyclic epoxy compound may be used alone or in combination of two or more. Further, the photo-curable adhesive may also contain an oxetane compound as an active energy line-solid compound other than the solid epoxy resin of I54525.doc •20-201136999. The hardening speed of the photocurable adhesive can be increased by using an oxetane compound in combination. The photocationic polymerization initiator is a polymer which generates a cationic species or a Lewis acid by irradiation with an active energy enthalpy such as visible light, ultraviolet rays, xenon rays or electron beams and starts the polymerization of an epoxy group. The compound which generates a cationic species or a Lewis ι by irradiation with an active energy ray is not particularly limited, and examples thereof include a salt such as an aromatic diazonium salt, a sulfonium salt or an aromatic sulfonium salt. ; and iron · aromatic smoke complex and so on. Examples of the aromatic diazo-based salt include phenyldiazonium hexahydrate, phenylhexidine hexafluorophosphate, and phenyldiazonium hexafluoro-pasteate. As the aromatic iodide salt, for example, ## am 』, diphenyl iodine tetra (pentafluorophenyl) side acid salt, diphenyl iron hexahydro citrate, diphenyl sulphate, Bis(4- mercaptophenyl)phosphonium hexafluorophosphate. As the aromatic onium salt, for example, triphenylsulfonium hexafluorophosphate, dibasic error-producing hexammonium hydride, _TM·di-based iron-dissolved tetrakis(pentafluorophenyl)-rutate can be exemplified. Salt, monophenyl [4-(phenylthio) kiwi] 'beneficiary' nickel hexafluoroantimonate, 4,4'-bis[diphenylindenyl]diphenylsulfonium hexafluorophene salt, 4 ,4,-bis[bis(β-hydroxyethoxy)phenylindenyl]diphenyl sulfide dihexafluorophene® salt, 4,4,-bis[bis(β-hydroxyethoxy)benzoquinone Diphenyl sulfide dihexafluoroanthr% & salt, 7-[bis(p-quinfenylidene) indenyl]-2-isopropylthioxanthone hexafluoroantimonic acid [^ (p-toluene) Sulfhydryl) fluorenyl]-2-isopropylthioxanthone tetrakis(pentafluoroanthracene) butterfly salt, 4-phenylcarbonyl-4,-diphenylene diphenyl sulfide hexafluoroantimonate , 4·(oblating tert-butylphenylcarbonyl)-4,-di 154525.doc •21· 201136999 Benzyl-diphenyl sulfide hexafluoroantimonate, 4_(p-tert-butylphenylcarbonyl) 4, _ bis (p-toluene) sulfhydryl-diphenyl sulfide bond tetra (pentanylphenyl) side acid salt, etc. As the iron-aromatic hydrocarbon complex, for example, xylene _ cyclopentane dilute Iron TO hexafluoroate, cumene, cyclopentadienyl iron (π) hexa(tetra) hydride, xylene, cyclopentadienyl iron („)·tris(trifluorofyl) These photocationic polymerization initiators may be used singly or in combination of two or more kinds. Among them, the wavelength region of 3 〇〇 nm or more also has ultraviolet absorbing characteristics, so that it can provide excellent solidity and In terms of an adhesive layer having good mechanical strength or adhesive strength, it is particularly preferable to use an aromatic salt. The amount of the photocationic polymerization initiator is contained in 1 part by weight of the photocurable adhesive. The active energy ray-curable compound such as a photocurable epoxy resin is usually from 0 to 5 to 20, preferably 15 parts by weight. If the amount is less than 0.5 part by weight, the hardening becomes insufficient, and the adhesive layer is When the mechanical strength or the adhesive strength is lowered, if the amount is more than 2 parts by weight, the ionic substance in the adhesive layer is increased, and the moisture absorption of the adhesive layer is enhanced, and the polarizing plate obtained is obtained. The situation in which the durability can be lowered. The agent may optionally contain a photosensitizer. By using a photosensitizer, the ruthenium resistance can be improved and the adhesion layer can be further improved. Mechanical strength or adhesion strength. As the photosensitizer, for example, a carbonyl compound, an organic sulfur compound, and a persulfidation can be cited. Materials, redox compounds, azo and diazo compounds, halides, photoreducible pigments, etc. I54525.doc -22· 201136999 If specific examples of photosensitizers are listed, there are benzoin ether and benzoin isopropyl ether. , benzoin derivatives such as α,α-dimethoxy-α-phenylphenidene; benzophenone, 2,4-dibenzophenone, phthalate, 4,4 , bis(monomethylamino)benzophenone, tetrabenzophenone derivative such as 4,4·-bis(diethylamino)benzophenone, 2-epoxide, 2-mercaptopurine Isomer derivatives; Ν_曱^ acridone, Ν-butyl. Acridine steel and so on. Acridine_derivative; acetophenone derivative such as ethoxy acetophenone, oxysterone derivative; ketone derivative; 9, H>-diethoxy onion and the like; 2 • thioxanthene A quinone (tetra) derivative such as a ketone or an isopropyl thiazide ketone; a diphenylethylene bis(tetra) compound; a ship compound. Photosensitizers can be used only! Two or more kinds may be used in combination. The composition of the photosensitizer is preferably 0.^20 parts by weight of the active energy ray-cure compound contained in the viscous agent. On the other hand, as a preferred example of the water-based adhesive, for example, an adhesive composition containing a polyvinyl alcohol-based resin or an amine-acetic acid resin as a main component can be mentioned. When a polyethylene glycol-based resin is used as a main component of the adhesive, the polyvinyl alcohol-based resin may be a modified base-modified polyethylene in addition to a partially specialized polyvinyl alcohol or a fully specialized poly(ethylene glycol). A modified polyethylene resin such as an alcohol, an ethylene glycol modified base polyethylene glycol, a methyl modified polyethylene glycol, an amine modified polyvinyl alcohol or the like. The water agent whose main component is a polyethylene glycol resin is usually an aqueous solution. The concentration of the polyvinyl alcohol-based resin in the adhesive is usually 1 to 4 parts by weight, preferably 丨 to 5 parts by weight, per 100 parts by weight of water. J54525.doc -23- 201136999 Adhesive composition of a compound amine vinegar resin and a compound having a glycidoxy group. Here, the polyester-based ionic polymer-type amine ester resin refers to an amine vinegar resin having a polyester skeleton and in which a small amount of an ionic component is introduced (hydrophilic into both. The ionic polymer-type amine s is a resin which is not used for emulsification. The agent is emulsified directly in water to form an emulsion, and is preferably used as a water-based adhesive. Polyacetate-based ionic polymer-type amine vinegar resin is known per se, and is disclosed in Japanese Laid-Open Patent Publication No. Hei 7-97504, for example. An example of a polymer dispersant in which a resin is dispersed in an aqueous medium is disclosed in Japanese Laid-Open Patent Publication No. 2005-70M0 and Japanese Patent No. 4GG5 2g8456, which disclose a polyester-based ionic polymer type amine ester resin. A composition of a compound having a glycidoxy group is used as an adhesive, and a cycloolefin resin film is bonded to a polarizing film containing a polyethylene glycol resin. The adhesive is applied to the polarizing film and adhered to the above transparent film. The method of the resin film may be a generally generally known method, and for example, by a casting method,

Meyer bar coating method, gravure coating method, kama (c〇mma) coating method, knife-to-knife method, die coating method, dip coating method, spray method, etc., on the adhesive surface of polarizing film and/or transparent resin film A method in which an adhesive is applied and the two are overlapped. The casting method is a method in which the film of the object to be coated is moved in the direction perpendicular to the vertical direction, the substantially horizontal direction, or the oblique direction therebetween, and the adhesive is allowed to flow to the surface thereof to expand the distribution. After the application of the adhesive, the polarizing film and the transparent resin film are sandwiched by a nip roll or the like and bonded. Further, after the adhesive is added dropwise between the polarizing film and the transparent resin film, it is pressed by a roller or the like, and uniformly spread and bonded to the film. In this case, metal or rubber may be used as the material of the roller. . Alternatively, the adhesive may be added dropwise to the polarizing film and the 154525.doc •24·201136999 transparent resin film is passed between the rollers. s &lt; When the film is bonded, and ^ ^ 忑 is slippery, the rolls can be of the same material' or different materials. In addition, in order to improve the adhesion, the surface of the adhesive coating surface of the transparent resin film or the surface of the adhesive layer may be appropriately subjected to electric conduction treatment, electric power treatment, and external irradiation treatment before being bonded to the polarizing film. Flame (flame) treatment: special treatment and other surface treatment. As the four treatment, a method of immersing in an alkaline aqueous solution such as sodium bismuth oxide or potassium hydroxide can be mentioned. It is also possible to heat-treat the transparent resin film on both sides of the polarizing film via the adhesive layer. The heat treatment is carried out, for example, by spraying hot air, and the temperature is usually from 4 Torr to 100 Å. Within the range of 〇, it is preferably within the range of 6〇~1〇(^). The drying time is usually 2〇~1200 seconds. The thickness of the adhesive layer obtained by the dry water adhesive is usually 〇〇1~5 μηι The left and right sides are preferably 2 μπι or less, and more preferably i or less. When the thickness of the adhesive layer is less than 〇.〇μπι, 'the adhesion becomes insufficient 又' and the thickness of the adhesive layer When the thickness is more than 5 μm, the appearance of the polarizing plate is poor. When a photo-curable adhesive is used as the adhesive, the active energy ray is irradiated by laminating the transparent resin film on both sides of the polarizing film via the adhesive layer. This hardens the adhesive layer. The light source of the active energy ray is not particularly limited. It is preferably an active energy ray having a light-emitting distribution at a wavelength of 400 nm or less. Specifically, a low-pressure mercury lamp, a medium-pressure mercury lamp, a high-pressure mercury lamp, Ultra-high pressure mercury lamp, chemical lamp, black lamp, microwave excited mercury lamp, metal toothed lamp, etc. 154525.doc -25- 201136999 The intensity of light intensity of active energy ray is suitable according to the composition of photo-curable adhesive The determination is not particularly limited. It is preferably in the range of 〇"~_〇mW/cm2 in the wavelength region effective for activation of the photocationic polymerization initiator. The intensity of light irradiation is (M mWW or more, And the reaction time does not become too long'. By reducing the heat generated by the light source and the heat generated by the curing of the photocurable adhesive by 6 〇〇〇mW/cm2 or less The deterioration of the polarizing film or the photo-adhesive coating is not particularly limited, and is preferably a product of the above-mentioned light irradiation intensity and the irradiation time. The cumulative amount of light indicated is set in the range of 10 to 10000 mj/m2. By integrating the amount of light to 10 mJ/m2 or more, a sufficient amount of the active material derived from the photocationic polymerization initiator can be produced and hardened more reliably. In addition, the reaction can be maintained at a temperature of 10000 mJ/m 2 or less, so that the irradiation time does not become too long to maintain good productivity. The polarizing film, the transmittance and the hue of the polarizing film, and the transparent resin film are preferable. Each of the transparency of the polarizing plate The active energy ray is irradiated under the condition that the function is not lowered. When the photo-curable adhesive is used, the thickness of the adhesive layer after hardening is usually about 0·01 to 1 〇μπι, preferably 〇. 1 μιη or more is preferably 5 μηη or less. (Other members) The polarizing plate of the present invention may have an adhesive layer laminated on one of the transparent resin films. When the polarizing plate is used in a liquid crystal display device, The adhesive layer can be preferably used, for example, for bonding to a liquid crystal cell. A polypropylene resin film containing an ultraviolet absorber is attached to one surface of the polarizing film, and the other surface is attached to 154525.doc -26-201136999. There is a drop; water h, reduced to phase #amine tree (four), especially on the resin film of the 4 olefin resin film horse phase difference film. In general, the adhesive layer is laminated on the norbornene-based adhesive for the adhesive layer, and the adhesive can be used without any particular limitation. For example, an acrylic adhesive or an amine can be cited.酉 系 系 黏 黏 、 、 、 酉 酉 酉 酉 酉 酉 酉 酉 酉 酉 酉 酉 酉Among them, from the viewpoints of transparency, adhesion, and I-processability, it is preferred to use an acrylic adhesive layer "in addition to the use of a slit extrusion coater or a gravure on a transparent resin film. The method of applying a solution containing an adhesive to a machine or the like and drying it can be carried out by transparently transferring the adhesive layer formed on the film (referred to as a separator) which is subjected to a release treatment (four) film. The method of the resin film is set again. The thickness of the adhesive layer is usually preferably in the range of 2 to 4 pm. The polarizing plate of the present invention may be provided with another optical functional film via a viscous (four) layer on a transparent resin film (e.g., a norbornee-thin resin film or a propylene-based resin film). An example of an optical functional film that can be preferably bonded to a transparent resin film on the liquid crystal cell side is an optical compensation film coated on the surface of the substrate and having a liquid crystal compound, and a polycarbonate-based compound. A retardation film of a transparent resin such as a resin. If an example of an optical functional film which can be preferably attached to a transparent resin film on the far side of the liquid crystal cell (ie, the backlight side) of the back side polarizing plate is exemplified, it penetrates a certain polarized light and reflects the opposite property. A polarized reflective polarizing film, a reflective film having a reflective function on the surface, and a semi-transmissive reflective film having both a reflective function and a penetrating function. "Wv Film" (manufactured by Fuji Film Co., Ltd.) and "NH Film", which are equivalent to the optical film 154525.doc •27·201136999, which is applied to the surface of the substrate and which is provided with a liquid crystal compound. (Manufactured by Nippon Oil Co., Ltd.), "LC Film" (manufactured by Nippon Oil Co., Ltd.), etc. For example, "DBEF" (manufactured by 3M Company, available from Sumitomo 3M Co., Ltd. in Japan), etc., may be mentioned as a sales product corresponding to a polarized light-transmissive film that transmits a polarized light and reflects the polarized light of the opposite nature. . &lt;Liquid Crystal Display Device&gt; The polarizing plate of the present invention can be preferably applied to a liquid crystal display device. In the liquid crystal display device, the polarizing plate of the present invention is disposed on the back side of the liquid crystal panel via an adhesive layer. In this case, the polarizing plate of the present invention is disposed such that the polypropylene resin film containing the ultraviolet ray absorbing agent is located farther from the liquid crystal cell, that is, the backlight device. Since the liquid crystal display device uses the polarizing plate of the present invention, it is excellent in durability and excellent in display performance. In the liquid crystal display device, a suitable composition of a conventionally known liquid crystal display device can be employed in addition to the above-described features. The liquid crystal display device can suitably include a constituent member (a light diffusing plate, a backlight device, etc.) which is usually included in addition to the liquid crystal panel. ). In addition, the "side surface side of the liquid crystal panel" means that the liquid crystal panel is mounted on the backlight side of the liquid crystal display device. On the other hand, the "front side" of the liquid crystal panel means that the liquid crystal panel is mounted on the liquid crystal display device. The visual side of the time is confirmed. The polarizing plate provided on the front side of the liquid crystal panel (hereinafter referred to as the front side polarizing plate) may be a previously known suitable polarizing plate, and it is preferably in terms of display characteristics such as contrast ratio or viewing angle of the liquid crystal display device. For the surface of the polarizing film containing a polyvinyl alcohol-based resin, a fiber 154525.doc • 28 - 201136999 vitamin resin film is attached to the other surface with a turbidity 卜·buckle% pair A polarizing plate of a stupid-ethylene phthalate film. Preferably, the polarizing plate is bonded such that the cellulose resin film side faces the liquid crystal cell. Poly(terephthalic acid) Ethylene film is a combination of mechanical properties, solvent resistance, scratch resistance, and cost. The polarizing film of the front side polarizing plate can be the same as those described in the above-mentioned polarizing plate of the present invention. The polyethylene terephthalate's repeating unit constituting the polyethylene terephthalate film of the front side polarizing plate has a resin of 80 parts by weight or more of ethylene terephthalate. Examples of the other copolymerization component include isophthalic acid, 4,4'-dicarboxydiphenyl, 4,4,-dicarboxybenzophenone bis(4-carboxyphenyl)ethene, adipic acid, Dicarboxylic acid components such as azelaic acid, m-benzoic acid _5_ acid sodium, 1,4 - bis-cyclohexyl ring; propylene glycol, butanediol, neopentyl glycol, diethylene glycol, cyclohexane A diol component such as a diol, an ethylene oxide adduct of bisphenol A, polyethylene glycol, polypropylene glycol, or polytetramethylene glycol. These two ortho-acid components or diol components may be used in combination of two or more kinds as needed. Further, a hydroxycarboxylic acid such as p-hydroxy alum acid or p-hydroxyethoxybenzoic acid may be used in combination with the above dicarboxylic acid component or diol component. The above other copolymerization component may also contain a compound containing a small amount of an amine bond, an amine ester bond, an ether bond, a carbonate bond or the like. As a method for producing polyethylene terephthalate, a so-called direct polymerization method in which a stannous acid and a methanol are directly reacted, and a so-called ester which is transesterified with ethylene glycol is used. Any manufacturing method such as an exchange reaction method. Further, as desired, polyethylene terephthalate may contain a known 154525.doc •29·201136999 additive. It may contain, for example, a lubricant, an anti-caking agent, a heat stabilizer, an antioxidant, an antistatic agent, a light stabilizer, an impact modifier, and the like. Among them, it is preferable to limit the amount of the additive to a minimum in terms of the transparency of the film. The polyethylene terephthalate film is preferably stretched, and can be produced by forming the above polyethylene terephthalate into a film shape and performing elongation treatment. Extending as long as it can be extended by a uniaxial extension extending in MD (film longitudinal direction) or ^ (direction perpendicular to the longitudinal direction of the film), a biaxial extension extending on both sides of the survey (4), and extending in a non-TM direction Any method can be applied. By carrying out the stretching operation, a polyethylene terephthalate film having a high mechanical strength can be obtained. Among them, in the liquid crystal display device, it is preferable that the uniaxially stretched polyethylene terephthalate film is uniaxially stretched. The method for producing the uniaxially stretched polyethylene terephthalate film is not particularly limited, and a method of smelting the polyethylene terephthalate H into a sheet-like unaligned form is exemplified. The film was subjected to a heat setting treatment after a lateral stretching (td direction extension) by a tenter at a temperature higher than the glass transition temperature. The stretching temperature is preferably 8 〇 130 (: 'more preferably 90 to 12 〇. (:. The stretching ratio is preferably 25 to 6 times, 5.5 times. The right stretching ratio is lower, there is polyethylene terephthalate. Secondly, the tendency of sufficient transparency is not shown. In the case of biaxial stretching, the unaligned film which is extruded into a sheet shape is stretched and longitudinally stretched at a temperature above the glass transfer degree ( The method of extending in the MD direction, and then the method of stretching (extending in the TD direction) or simultaneously extending in the vertical and horizontal directions is 154525.doc 201136999, etc. Further reducing the alignment in the polyethylene terephthalate film From the viewpoint of the main enthalpy, it is preferable to extend the method as follows. For example, when the shape is extended, the film is subjected to loosening treatment along the length 3 before performing the heat-fixing treatment after the lateral stretching. The temperature at which he handles is 90 to 20 generations, preferably 120 to 180 ° C. Although the amount of looseness varies depending on the extension conditions, the heat shrinkage of the film after 15 ton is better. The rate is set to the amount of slack and the temperature in the following manner. The temperature of the heat setting treatment is usually 1 8G~25Gt, more than _~245°C. The heat setting treatment is preferably 'firstly performed at a fixed length: treatment at a temperature' and then the ratio of the looseness in the width direction of the film is -1 to 10% (compared The relaxation treatment is carried out in a manner of preferably 2 to 5%. Thus, an extended formic acid ethylene glycol film having a reduced distortion of the alignment main axis and excellent heat resistance can be obtained. The orientation of the alignment spindle of the polyethylene terephthalate film The maximum value is preferably 1 degree or less, more preferably 8 degrees or less, and further preferably 5 degrees or less. In the case of using a polyethylene terephthalate film having a maximum value of the distribution spindle exceeding 10 degrees. In the case where the polarizing plate π using the above-mentioned polyethylene terephthalate film is placed in a liquid crystal display device, the coloring failure tends to increase. The alignment spindle of the benzene-methyl I ethyl ester film is re-polymerized. The maximum value of the distortion can be measured, for example, by using the retardation film detecting device "RETS system" (manufactured by Otsuka Electronics Co., Ltd.). Polyphenylene oxide is used in view of the operability of the film and the thickness reduction of the polarizing plate. I54525.doc -31 - 201136999 Thickness of ethylene diformate film Preferably, the turbidity of the polyethylene terephthalate film is in the range of 0.1 to 40%. If the turbidity is less than 0.1%, the irregularity of the liquid crystal display device cannot be sufficiently suppressed. Further, when the turbidity exceeds 40%, the light diffusion is too strong, and the front luminance or visibility of the liquid crystal display device tends to decrease. Further, the turbidity of the polyethylene terephthalate film is JIS κ. It is defined in 7136 that the ratio of the diffusion transmittance to the total light transmittance can be measured by a commercially available mist meter. As a method of imparting haze to the polyethylene terephthalate film, a method of mixing inorganic fine particles or organic fine particles with polyethylene terephthalate, and coating a surface of the polyethylene terephthalate film with a coating liquid containing inorganic particles or organic fine particles in a resin binder. Method, etc. Examples of the inorganic fine particles include: cerium oxide, colloidal silica, oxidized, oxidized sol, aluminosilicate, alumina-cerium oxide composite oxide, kaolin, talc, mica, carbon ray, phosphorus _Wait. Examples of the organic fine particles include heat-resistant resin particles such as crosslinked polyacrylic acid particles, crosslinked polystyrene particles, crosslinked polymethylacrylic acid methyl ketone particles, (tetra) lipid particles, and polyamidene particles. The poly(p-acetic acid) ethylene vinegar film is preferably an in-plane retardation value R. It is (10)0 nm or more, more preferably 3 〇〇〇 nm or more. When the in-plane phase difference is less than 1000 nm, the irregularity generated from the front side of the liquid crystal display device tends to become obvious. The in-plane phase difference of the polyethylene terephthalate film has an upper limit of about 10000 nm. In the polyethylene terephthalate film, an easy adhesion layer can also be imparted. 154525.doc • 32· 201136999 Polyethylene terephthalate film with easy adhesion layer can be produced by the following method: a method of forming an easy-adhesion layer on the film which completes the extension step. In the step of the bismuth diacetate, for example, a method of forming an easy-adhesion layer between the longitudinal stretching step and the lateral stretching step; and a method of forming an easy-adhesion layer immediately before or after adhesion to the polarizing film. In the case of producing a biaxially stretched film, from the viewpoint of productivity, a method of forming an easy-adhesion layer and continuing lateral extension after extending the polyethylene terephthalate (I) in the I direction is preferably employed. (4) The layer may be applied to both sides of the polyethylene terephthalate film or to one side of the film to which the polarizing film is adhered via the adhesive layer. The component constituting the easy-adhesion layer is not particularly limited, and examples thereof include a polyester resin, an amine ester resin, and an acrylic resin which have a polar group on the skeleton and a relatively low molecular weight and a relatively low glass transition temperature. Further, it is also possible to contain a crosslinking agent, an organic or inorganic filler, a surfactant, a lubricant, and the like. Surface treatment such as antiglare treatment, hard coating treatment, and antistatic treatment may be applied to the opposite surface of the polyethylene terephthalate film attached to the surface of the polarizing film #. Further, a coating layer containing a liquid crystal compound or a high molecular weight compound thereof may be formed. Further, even if a polyethylene naphthalate film was used instead of the polyethylene terephthalate film, substantially the same effect was obtained. The cellulose-based resin film which can be used in the surface-side polarizing plate is a film containing a partial esterified product or a fully esterified product of cellulose, and examples thereof include acetate containing cellulose, propionate, butyrate, and the like. A film of a mixed ester or the like. More specifically, a diethyl fluorene cellulose film, a diethyl fluorene cellulose film, a cellulose acetate propionate film, a cellulose acetate butyrate film, or the like can be cited. As the above-mentioned cellulose ester film, 154525.doc -33-201136999 can use appropriate sales items such as "Fujitac TD80" (manufactured by Fuji Film Co., Ltd.), "Fujitac TD80UF" (manufactured by Fuji Film Co., Ltd.), "Fujitac TD80UZ". (manufactured by Fuji Film Co., Ltd.), "KC8UX2M j (manufactured by Konica Minolta Opto Co., Ltd.), "KC8UY" (manufactured by Konica Minolta Opto Co., Ltd.), and the like. The adhesive for bonding the polyethylene terephthalate film or the cellulose resin film to the polarizing film may be the photocurable adhesive or the water-based adhesive. The following examples will be described in detail. The invention is not limited to the embodiments. The phase difference of the film, the measurement of the water vapor transmission rate and the light transmittance at 4 ° C, and the evaluation of the adhesion strength of the polarizing plate were carried out by the following methods. [Measurement of the phase difference value] The phase difference measuring device r k〇BRA_wr (manufactured by Oji Scientific Instruments Co., Ltd.) was used to measure the wavelength of 59〇11111. [Measurement of Water Vapor Transmission Rate] According to JIS Z 0208, the water content of the film which was calculated to be a film per 1 m 2 area was measured under the conditions of temperature 4 (TC, relative humidity of 90%) for 24 hours. Measurement of the transmittance] The ultraviolet/visible spectrophotometric UV-2450" manufactured by Shimadzu Corporation was used to measure the transmittance of light per 1 nm in the range of 220 700 nm using a polypropylene resin film. Among the wavelengths of wavelengths between 154525.doc -34 and 201136999 between 300 and 340 nm, the highest value is selected as the light transmittance. The smaller the value is, the blocking wavelength is 3〇〇~34(). The ultraviolet light reduction performance of nm light is excellent. [Evaluation of adhesion strength] By adjusting the application area of the adhesive to the polypropylene resin film, the length between the polypropylene resin film and the polarizing film is made from the end portion. The direction 2 〇 claw area becomes a polarizing plate in the area where the adhesive is not applied, and is cut into a width direction of 25 mm x a length direction of 150 mm (there is no adhesive in a region of 20 mm at a mid-length end of 150 mm) Band, and make a total of 5 test strips The test piece was subjected to a hand peeling test by hand peeling off from the end portion without the adhesive, and the adhesion strength between the polypropylene resin film and the polarizing film was evaluated according to the following evaluation criteria. A ·· Can be peeled off by 5 mm or more The number of test pieces is one, which has good adhesion strength. B: The number of test pieces capable of peeling 5 mm or more is 1 to 3, and the intensity of the test piece is slightly lower. c · The test capable of peeling off 5 mm or more The number of sheets is 4 to 5, and the adhesive strength is low. &lt;Example 1&gt; A polypropylene-based resin, that is, a propylene/ethylene copolymer (ethylene content - 0.4% by weight, MFR = 9 g / 1 〇 min) is contained. 99 parts by weight of a resin composition of "Adekastab LA-31" (manufactured by Adeka Co., Ltd., molecular weight 664, hydroxybenzotrisyl ultraviolet absorber) in an amount of 99 parts by weight, and extruded at 50 ππηφ by heating to 275 ° C The press was melt-kneaded, and then extruded in a molten state by a T-die of 154525.doc -35 - 201136999 600 mm width, and the temperature was adjusted to 25. (: The cooling roller was cooled to obtain a thickness of 80 μm Film. The polypropylene resin film The content of the ultraviolet absorber is 1.0% by weight. The turbidity measured according to JIS BC 7136 is 〇·9%, and the water vapor permeability at 40t is 4 g/m2-day °, and then 'for the above polypropylene-based resin film After the surface is subjected to corona treatment, a photocurable adhesive comprising a photocurable epoxy resin and a photocationic polymerization initiator is coated on the corona treatment surface at a thickness of 4 μm. On the other hand, the biaxial stretching is performed. Norbornene-based resin film (thickness = 60 μπι, in-plane phase difference R 〇 = 63 nm, thickness direction phase difference Rth = 225 nm, 40). After one side of (the lower water vapor permeability = 1 g/m2.day) was subjected to corona treatment, the same photocurable adhesive as described above was applied to the corona-treated surface at a thickness of 4 μm. Then, the polypropylene-based resin film is laminated on one surface of the polarizing film via an adhesive, and the norbornene-based resin film is laminated on the other surface via an adhesive, and the nip roller is performed by using one of the i-claws. Clamping. Thereafter, ultraviolet rays are irradiated from the side of the norbornene-based resin film, and the adhesive layers of both are cured to obtain a polarizing plate. <Example 2> A polarizing plate was obtained in the same manner as in Example 1 except that the content of the ultraviolet absorber in the polypropylene resin film was changed to 3% by weight. <Example 3> A polarizing plate was obtained in the same manner as in Example 1 except that "cyasorb UV1164" (manufactured by Syatec Co., Ltd., molecular weight: 09 hydroxy-pigmented ultraviolet absorber) was used as the ultraviolet absorbing agent, 154525.doc -36·201136999 . &lt;Comparative Example 1 &gt; A polarizing plate was obtained in the same manner as in Example 1 except that the polypropylene resin film did not contain the ultraviolet absorber. &lt;Comparative Example 2&gt; A polarizing plate was obtained in the same manner as in Example 3 except that the content of the ultraviolet absorber in the polypropylene resin film was i 5 wt%. In the comparative example, the "Sumisorb 200" (manufactured by Sumitomo Chemical Co., Ltd., a molecular weight 225'-based benzotriazole-based ultraviolet absorber) was used as the ultraviolet absorber, and the content of the ultraviolet absorber in the polypropylene resin film was set to 〇. .5 wt% Others A polarizing plate was obtained in the same manner as in Example 1. <Comparative Example 4> A polarizing plate was obtained in the same manner as in Example 1 except that "Sumisorb 130" (manufactured by Sumitomo Chemical Co., Ltd., molecular weight 326, hydroxybenzophenone-based ultraviolet absorber) was used as the ultraviolet absorber. &lt;Comparative Example 5&gt; A polarizing plate was obtained in the same manner as in Example 3 except that the content of the ultraviolet absorber in the polypropylene resin film was changed to 〇5 by weight/〇. The types of ultraviolet absorbers used, the molecular weight and content thereof, the turbidity and light transmittance of the polypropylene resin film, and the evaluation results of the adhesion strength between the polypropylene resin film and the polarizing film are summarized in Table 1. in. 154525.doc -37· 201136999 Table 1

UV absorber polypropylene resin film adhesion strength type molecular weight content (weight ° /.) turbidity (%) light transmittance (%) Example 1 Adekastab LA-31 664 1.0 0.9 1 or less A Example 2 0.3 0.6 16 A Example 3 Cyasorb UV1164 509 1.0 0.5 1 or less A Comparative Example 1 - - - 0.9 92 B Comparative Example 2 Cyasorb UV1164 509 1.5 0.6 1 or less C Comparative Example 3 Sumisorb 200 225 0.5 1.8 16 C Comparative Example 4 Sumisorb 130 326 1.0 0.3 27 C Comparative Example 5 Cyasorb UV1164 509 0.05 0.9 48 B 154525.doc -38 -

Claims (1)

201136999 VII. Patent application scope: 1 . A polarizing plate which is bonded to a transparent resin film on both sides of a polarizing film comprising a polyvinyl alcohol-based resin via an adhesive, and is bonded to the transparent resin on both surfaces The water vapor permeability of the film 401 is 50 g/m2.day or less, and at least one of the transparent resin films bonded to the both surfaces is 0"weight 0/. The polypropylene resin film containing an ultraviolet absorber having a molecular weight of 450 or more is less than 1.5% by weight. 2. The polarizing plate of claim 1, wherein the transparent resin film adhered to one surface of the polarizing film is less than 1% by weight. The polypropylene resin film containing the ultraviolet absorber having a molecular weight of 450 or more is used, and the transparent resin film bonded to the other surface of the polarizing film is a norbornene resin film. 3. The polarizing plate according to claim 1, wherein the ultraviolet absorbing agent is a hydroxybenzodiazepine or a hydroxytrinomethane ultraviolet absorbing agent. 4. The polarizing plate of claim 1, wherein the polypropylene resin constituting the polypropylene resin film is a copolymer of propylene and ethylene or a homopolymer of propylene. A liquid crystal display device which has a polarizing plate as claimed. 154525.doc 201136999 IV. Designated representative map: (1) The representative representative of the case is: (none) (2) The symbolic symbol of the representative figure is simple: 5. If there is a chemical formula in this case, please reveal the best indication of the characteristics of the invention. Chemical formula: (none) 154525.doc