TW201202761A - Polarizing plate set, and liquid crystal panel and liquid crystal display device using the same - Google Patents

Abstract

The present invention provides a polarizing plate set, and a liquid crystal panel and liquid crystal display device containing the same. The polarizing plate set comprises a first polarizing plate and a second polarizing plate for liquid crystal panel use. The first polarizing plate has a first polarizing film made of a polyvinyl alcohol resin, and a polypropylene resin film laminated on a single surface of the first polarizing film. The second polarizing plate has a second polarizing film made of a polyvinyl alcohol resin and an antidazzle protective film having a haze value ranging from 3 to 45% laminated on a single surface of the second polarizing film.

Description

201202761 VI. [Technical Field] The present invention relates to a polarizing plate comprising a polypropylene resin film in a single-layer layer formed of a polarizing film formed of a polyvinyl alcohol-based resin, and a polyvinyl alcohol A polarizing plate group of an anti-glare protective film having a haze value of a predetermined range in a single-layer layer of a polarizing film formed of a resin, and a liquid crystal panel and a liquid crystal display device including the same. [Prior Art] The polarizing plate is a component of a liquid crystal panel which is a main component of a liquid crystal display device, and is generally configured to have one or both sides of a polarizing film formed of a polyethylene resin which is adsorbed and aligned by a dichroic dye. A protective film is laminated via the adhesive layer, for example, a cellulose resin film typified by triacetyl cellulose. The liquid crystal panel is obtained by bonding the other optical film to the liquid crystal cell using a binder as needed. The liquid crystal display device is used as a liquid crystal TV, a liquid crystal monitor, a personal computer, etc., and its use is rapidly expanding. In particular, the market for LCD TVs has expanded significantly, and the requirements for cost reduction are also very strong. In the case of a liquid crystal television, a polarizing plate is formed by using a water-based adhesive laminated aluminum oxide film (TAC film) on both surfaces of a polarizing film formed of a polyvinyl alcohol-based resin film, and a polarizing plate is formed. A product in which a single-sided film is adhered to a retardation film by a binder. As a retardation film laminated on a polarizing plate, a processed product of a polycarbonate-based eucalyptus film or an extended processed product of a cycloolefin-based resin film is used, but in the case of a liquid crystal television, a phase at a high temperature is often used. A retardation film formed of a cycloolefin resin film having a very small difference. 154840.doc 201202761 For the laminate of a polarizing plate and a retardation film formed of a stretched olefin-based resin film, in order to improve productivity and reduce product cost, it has been attempted to reduce the number of components and the simplification of the process. For example, in Japanese Patent Laid-Open Publication No. Hei 8-43 812 (specifically, reference to Embodiment 4), a single-area layer TAC film on a polarizing film is disclosed, and a ring having a phase difference function is not disposed on the opposite side of the TAC film. The structure of an olefin-based (norbornene-like) resin film. SUMMARY OF THE INVENTION In addition, in the use of a large-screen liquid crystal television, for example, as a wall-mounted television, the demand for a thinner and lighter liquid crystal display device is conspicuous. In this case, the following aspects are the subject of the liquid crystal panel and its components. (1) It is necessary to increase the strength of the panel in response to the thin screen of the liquid crystal panel. (2) In order to reduce the thickness of LCD TVs, it is necessary to reduce the thickness of the components used. (3) It is necessary to prevent round-shaped spots and Newton rings caused by the gap between the liquid crystal panel and the backlight system on the back side being narrowed, and the liquid crystal panel being in contact with the backlight system. In order to solve the above problems, it is considered that a polyester resin such as an extended polyethylene terephthalate film excellent in mechanical strength and cost of the film is used as a protective film for a polarizing plate. However, when the polyester resin film is placed on a liquid crystal display device and the image is viewed, the color difference (also referred to as interference spot or rainbow spot) is apparent when viewed from the oblique direction due to the influence of the phase difference, and the visibility is poor. The present invention has been made to solve such a problem, and an object of the invention is to provide a polarizing plate group capable of obtaining a liquid crystal display device in which color spots are suppressed from oblique observation. In order to solve this problem, the inventors of the present invention have found that a polarizing plate having a polypropylene resin film in a single-layer layer of a polarizing film formed of a polyvinyl alcohol-based resin is used. A combination of a polarizing plate having an anti-glare protective film having a haze value of 3% to 45% in a single-layer layer of a polarizing film formed of a vinyl alcohol-based resin is a polarizing plate which is a component of a liquid crystal panel, and can be self-slanted. The liquid crystal display device in which the color unevenness at the time of observing the liquid crystal display device is suppressed has completed the present invention. The polarizing plate group of the present invention includes a second polarizing plate and a polarizing plate group for a liquid crystal panel of a second polarizing plate. The second polarizing plate has a first polarizing film made of a polyvinyl alcohol resin, and the second polarizing film is formed on the second polarizing film. In the polypropylene-based resin film of the single-layer layer of the film, the second polarizing plate has a second polarizing film formed of a polyvinyl alcohol-based resin, and a haze value of 3% in a single-layer layer of the second polarizing film is 〜 45% anti-glare protective film. In the polarizing plate assembly of the present invention, the second polarizing plate further includes an optical compensation film laminated on a surface of the first polarizing film opposite to a surface on which the polypropylene resin film is laminated. The antiglare protective film of the present invention may be composed of, for example, a polyester resin film, a cellulose resin film, an olefin resin film, an acrylic resin film, or the like, and particularly preferably a polyester resin film. In the polarizing plate assembly of the present invention, the second polarizing plate further includes an optical compensation film laminated on a surface of the second polarizing film opposite to the surface on which the anti-glare protective film is laminated, 154840.doc 201202761. . Further, the present invention provides a liquid crystal panel comprising the above-described first polarizing plate, a liquid crystal cell, and the second polarizing plate, respectively, in which the polarizing plate group of the present invention is disposed, and the first polarizing film is the first polarizing film. The surface opposite to the surface on which the polypropylene resin film is laminated is disposed to face the liquid crystal cell, and the second polarizing plate is opposite to the surface of the second polarizing film on which the antiglare protective film is laminated. The face is disposed opposite to the liquid crystal cell described above. Further, the present invention provides a liquid crystal display device which has a backlight, a light diffusion plate, and the liquid crystal panel of the present invention, wherein the liquid crystal panel is disposed such that the polypropylene resin film faces the light diffusion plate. According to the specific polarizing plate group (combination) according to the present invention, it is possible to improve the mechanical strength and thickness of the liquid crystal panel by using the polypropylene resin film, and at the same time, it is possible to improve the polyester resin film. A stain caused by a phase difference when viewed from an oblique direction. The polarizing plate group and the liquid crystal panel using the same can be suitably used for a liquid crystal display device for a large-screen liquid crystal television, and more particularly, a liquid crystal display device for a liquid crystal television that can be wall-mounted. [Embodiment] <Polarizing Plate> The polarizing plate group of the present invention includes two polarizing plates of the i-th polarizing plate and the second polarizing plate, and these can be used as constituent components of the liquid crystal panel. The liquid crystal panel can be used in liquid crystal. The first polarizing plate is used as the polarizing plate on the back side of the liquid crystal panel, and the second polarizing plate can be used as the polarizing plate on the front side of the liquid crystal panel to make the 154840. .doc 201202761 Use. Here, the "back side polarizing plate" refers to a polarizing plate located on the backlight side when the liquid crystal panel is mounted on a liquid crystal display device, and the "front side polarizing plate" refers to a liquid crystal panel mounted on a liquid crystal display device. View the side of the polarizing plate. Each polarizing plate will be described in detail below. (First Polarizing Plate) The first polarizing plate can be produced as a single-layer polypropylene resin film of a first polarizing film made of a polyethylene resin, which can be used as a back side polarizing plate of a liquid crystal panel. Specifically, the first polarizing film is obtained by adsorbing and aligning a dichroic dye on a uniaxially stretched polyvinyl alcohol resin film. As the polyvinyl alcohol-based resin, a product obtained by saponifying a polyvinyl acetate-based resin can be used. As the polyvinyl acetate-based resin, in addition to polyvinyl acetate which is a homopolymer of ethylene acetate, a copolymer of another monomer copolymerizable with vinyl acetate or the like can be exemplified. Examples of the other monomer which can be copolymerized with ethyl acetate are, for example, unsaturated carboxylic acids, olefins, vinyl ethers, unsaturated sulfonic acids, acrylamides having an ammonium group, and the like. The degree of saponification of the polyvinyl alcohol-based resin is usually 85 mol% to 1 mol%, preferably 9 8 mol% or more. The polyvinyl alcohol-based resin can be further modified, and for example, polyethylene furfural or polyethylene acetaldehyde modified with an aldehyde can also be used. Further, the degree of polymerization of the polyethylene resin is usually about 1 〇〇〇 to 1 〇〇〇〇, preferably about 1,500 to 5,000. The film obtained by forming the polyvinyl alcohol resin can be used as the original film of the second polarizing film. The method for producing a film made of a polyvinyl alcohol-based resin is not particularly limited. A film can be formed by a known method. The film thickness of the original film of the polyvinyl alcohol-based resin is not particularly limited, and is, for example, about 1 μm to about 50 μm. 154840.doc 201202761 The first polarizing film is usually produced by the following steps: uniaxially stretching the resin film (4); dyeing with a color coffee resin film to adsorb the dichroic dye; a step of treating a polyethylene glycol-based resin film to which a dichroic dye is adsorbed; and a step of washing with a boric acid aqueous solution and then washing with water. The uniaxial stretching of the polyvinyl alcohol-based resin film can be carried out before dyeing with a dichroic dye, or simultaneously with dyeing, or after dyeing. In the case of uniaxial stretching after dyeing, the uniaxial stretching may be carried out before the side acid treatment or in the boric acid treatment. Of course, uniaxial stretching can also be performed in these plurality of stages. For uniaxial stretching, uniaxial stretching can be performed between rolls with different circumferential speeds, or uniaxial stretching can be performed using a heat roller. Further, the uniaxial stretching may be a dry stretching in which the film is stretched in the air, or may be a wet stretching in which the polyvinyl alcohol resin film is swollen using a solvent. The stretching ratio is usually about 3 times to 8 times. The method of dyeing the polyvinyl alcohol-based resin film with a one-color pigment is, for example, a method in which a polyvinyl alcohol-based resin film is impregnated into a water-containing liquid containing a dichroic coloring matter. As the dichroic dye, specifically, iodine or a dichroic dye can be used. Further, the polyvinyl alcohol-based resin film is preferably subjected to an impregnation treatment in water before the dyeing treatment. When iodine is used as the dichroic dye, a method in which a polyvinyl alcohol-based resin film is impregnated and dyed in an aqueous solution containing iodine and potassium iodide is usually used. The content of iodine in the aqueous solution is usually about 0.01% by weight per 100 parts by weight of water, and the content of potassium iodide is usually from about 0.5 part by weight to about 20 parts by weight per 100 parts by weight of water. The temperature of the aqueous solution used for dyeing 154840.doc 201202761 is usually 20. (: ~40 ° C left 纟, the immersion time (dyeing time) in the aqueous solution is usually about 20 seconds to 18 〇〇 seconds. On the other hand, the use of dichroic dyes as dichroic pigments In this case, a method of dyeing a polyvinyl alcohol-based resin film in an aqueous solution containing a water-soluble dichroic dye is usually used, and the content of the dichroic dye in the aqueous solution is usually 1 x 10 Å based on 100 parts by weight of water. 4 parts by weight to about 1 part by weight, preferably about 1×10·3 parts by weight to about 丨 parts by weight, and may be, for example, about ΐχΐ〇 by weight or less. The aqueous solution may contain an inorganic salt such as sodium sulfate as a dye-assisted m dye. The temperature of the dichroic dye aqueous solution is usually about 20 ° C to 80 ° C, and the dipping time (dyeing time) in the aqueous solution is usually about 10 seconds to 1800 seconds. After dyeing with a dichroic dye The boric acid treatment can be carried out by dipping the dyed polyvinyl alcohol-based resin film in an aqueous solution containing boric acid. The amount of boric acid in the boric acid-containing aqueous solution is usually 2 parts by weight to 15 parts by weight relative to 1 part by weight of water. weight Preferably, it is about 5 parts by weight to about 12 parts by weight. When iodine is used as the dichroic dye, the boric acid-containing aqueous solution preferably contains potassium iodide. The amount of potassium iodide in the boric acid-containing aqueous solution is relative to 1 part by weight. The water is usually from about 0.1 part by weight to about 15 parts by weight, preferably from about 5 parts by weight to about 12 parts by weight. The impregnation time in the aqueous solution containing boric acid is usually from about 6 sec to about 1200 sec, preferably 15 sec. Preferably, it is about 2 seconds to about 400 seconds. The temperature of the aqueous solution containing boric acid is usually 5 〇 β (: above, preferably 50 ° C to 85 ° C, more preferably 55 ° c 〜80〇c. The polyvinyl alcohol-based resin film after boric acid treatment is usually subjected to a water washing treatment, and the water washing treatment can be carried out, for example, by dipping a boric acid-treated polyvinyl alcohol-based resin film in water at 154840.doc 201202761 in water. The temperature of the medium water is usually about 5 ° c to 4 〇〇 c. The immersion time is usually from about 1 second to about 120 seconds. After the washing, the drying treatment is carried out to obtain the first polarizing film. The drying process can be performed by using a hot air dryer. Infrared heater. Drying process The ambient temperature is usually from about 3 ° C to about 100 ° C. Preferably, the time of the drying treatment is usually from about 60 seconds to about 600 seconds, preferably from about 120 seconds to about 600 seconds. The resin film is subjected to uniaxial stretching, dyeing of a dichroic dye, and boric acid treatment to obtain a second polarizing film. The thickness of the first polarizing film is, for example, about 5 μηη to 40 μηι. The first polarizing plate of the present invention is A single-layer polypropylene-based resin film of the first polarizing film formed of the above polyvinyl alcohol-based resin is produced. The polypropylene-based resin film is excellent in mechanical properties, solvent resistance, cost, and the like, and is used in such a polypropylene system. The resin film is excellent as the polarizing plate of the protective film, and the mechanical strength is excellent, and the thickness can be reduced. In the present invention, the polypropylene resin constituting the polypropylene resin film is more preferably 0.8% by weight.

A low molecular weight oligomer of an atactic type, etc. are mentioned. When the xylene soluble fraction is preferably 8% by weight or less, more than 5% by weight, and particularly preferably 0.5% by weight or less, the polypropylene resin-based resin film has a dilute soluble fraction of more than 9% by weight, and is then used at a high temperature. In the case of the environment, the polypropylene resin film table 154840.doc •10·201202761 ... the dimethyl sulfonate component [% by weight] of the polypropylene resin film was measured as follows. First, 5 g of a polypropylene resin film was added to 500 ml of boiling xylene, and after completely dissolved, the temperature was lowered to 2 (rc, and kept under grasp for 4 hours. Subsequently, the xylene solution was filtered to separate into precipitates and mash. The liquid was removed from the filtrate, and further dried at 70 t under reduced house to obtain a dry xylene soluble component. The xylene soluble fraction was obtained by the following formula: xylene soluble fraction [% by weight] = (weight of dry solid xylene dissolved component [g]) / (5 [g]) xl00 In the present invention, the polypropylene (tetra) resin constituting the polypropylene resin film may be a homopolymer of propylene, or may be propylene and The ruthenium polymer of the other monomer which can be copolymerized with it, and may be used in combination. Examples of other monomers copolymerizable with propylene include ethylene and α-lean. The atomic number is 4 or more, preferably 4 to 1 Å, and the α-olefin. Specific examples of the α-olefin having 4 to 7 carbon atoms are exemplified by 丨-butene, pentene, and oxime. Dilute 1 Geng:)# 1-1-dilute, bismuth and other straight-bonded single-dilute smoke; methyl 1-butene, 3-methyl-U-pentene, 4-methylpentene, etc. Branched monoolefins; ethylene-based cyclohexane and the like. The copolymer of propylene and other monomers which can be conjugated thereto may be a random copolymer or a block copolymer. When the above copolymer is used as the polypropylene-based resin, since the polypropylene-based resin which is soluble in xylene is relatively easy to be obtained, it is preferred that the copolymerization ratio of the other monomer copolymerized with propylene is 8 weight. The lower portion is more preferably 4% by weight or less. Furthermore, the copolymerization: the content of the structural unit derived from the other monomer can be carried out according to the method described in the "Polymer Analysis Manual" (published in the 'Kiyukuya Bookstore, 1995), page 616, 154S40.doc •11·201202761 (IR) Spectrometry was determined. In the above, as the polypropylene-based resin constituting the polypropylene-based resin film, it is preferred to use a homopolymer of propylene, a polypropylene-Buffalo random copolymer, a propylene small butadiene random copolymer, and propylene. Ethylene butene random copolymer. The homopolymers and copolymers are relatively easy to obtain a polymer having a reduced xylene soluble fraction by selection of a suitable polymerization catalyst or the like. In particular, by forming a homopolymer of propylene, there is a tendency to more easily obtain a polymer having a reduced xylene soluble fraction. Further, the stereoregularity of the polypropylene resin constituting the polypropylene resin film is preferably substantially syndiotactic (syndi〇tacUc) or syndiotactic. The polypropylene-based resin film which is formed of a polypropylene resin having an isotactic or syndiotactic stereoregularity is relatively excellent in handleability and excellent in mechanical strength in a high-temperature environment. Further, in the polypropylene resin having such stereoregularity, in the polymerization stage, 2 the generation of the low molecular weight component which causes the atacticity of the polarizing plate to be whitened is relatively small, so that it is easy to obtain transmission in a high temperature environment. A polarizing plate whose rate is suppressed is suppressed. In the present invention, the polypropylene resin may be a polymer or a copolymer obtained by polymerization using a known polymerization catalyst. Examples of the catalyst for polymerization include the following catalysts. (1) Ti-Mg-based catalyst containing a solid catalyst component containing magnesium, titanium and dentate as essential components, and (2) an organic combination of solid catalyst components containing magnesium, titanium and a nutrient as essential components Aluminium compound and, if necessary, an electron-donating compound, etc., a third-phase 154840.doc •12·201202761 catalyst system, (3) a metallocene catalyst. The solid catalyst component of the above-mentioned (1), for example, is described in Japanese Laid-Open Patent Publication No. SHO 61-218606, the Japanese Patent Application Laid-Open No. 612879- No. The catalyst system: In addition, as a preferred example of the organic compound in the catalyst system of the above (2), a mixture of triethyl ketone, triisobutyl butyl, triethyl sulphate and diethyl sulphate may be mentioned. Tetraethyl oxazepine or the like, as an electron-donating compound, more preferably cyclohexylethyldimethoxy ketone, tert-propylpropyl dimethyl, Xiyuan, and tert-butylethyldimethoxy Money, dicyclopentyl dimethyl hydride ^ and so on. In addition, the catalyst system described in the above-mentioned (3) bismuth metal-based catalyst is exemplified by Japanese Patent No. 251, Japanese Patent No. 2W, No. 2,668,732, and the like. The polymer is preferably a polymer or a copolymer which is easy to obtain a xylene soluble fraction. Therefore, a metallocene catalyst is preferably used. The polypropylene-based resin can be, for example, a burnt, a ruthenium, a simmer, or a cyclohexane: a hydrocarbon such as hexene, a second-hand kiln, a methylcyclohexyl, a benzene or a methylamine. The compound is representative of the law; the solution of the non-volume solution of Mm & 聚 is directly aggregated! =1! The bulk polymerization method of the agent; Rolling phase polymerization method, etc. The batching method can be carried out by means of a fly-in or a continuous method. As a method of dispersing a polypropylene resin, there is no particular reduction in the amount of the valence to 1% by weight to increase the polypropylene 榭t J β. For example, in the polymerization stage, the degree of polymerization of the rare resin is relatively Method for reducing the ratio of 154840.doc •13 to 201202761 of a low molecular weight component; a method of extracting a solvent-soluble component such as a low molecular weight component by a solvent to remove a polypropylene resin obtained by polymerization; and a combination of the methods And methods well known to those skilled in the art. Further, for example, by appropriately selecting a catalyst for polymerization, the stereoregularity of the polypropylene-based resin is controlled to be isotactic or syndiotactic, and, or by polymerization of acryl alone, the polypropylene resin is obtained. When the xylene soluble fraction is 5% by weight or less, it is not necessary to reduce the solubility of the polypropylene resin obtained by the polymerization. The polypropylene resin used in the present invention is preferably in accordance with JIS κ 7210, and is measured at a temperature of 230 t and a load of 21.18 N. (IV) Flow rate __ is 0.1 g/Η) minutes to 200 g/10 minutes. More preferably 〇 5 _ points ~ 50 gno points within the range. By using a polypropylene solder resin having mfr in this range without applying a large load to the extruder, a uniform polypropylene resin film can be obtained. A well-known additive can be added to the polypropylene resin insofar as the effects of the present invention are not impaired. Examples of the additive include an antioxidant, an ultraviolet absorber, an antistatic agent, a lubricant, a nucleating agent, an antifogging agent, an anti-blocking agent, and the like. Examples of the antioxidant include, for example, an anti-oxidant, a dish-based antioxidant, a sulfur-based antioxidant, a hindered amine-based light stabilizer, and the like, and it is also possible to use, for example, a combination of a plurality of antioxidant mechanisms and scales. The composite antioxidant of the unit of the antioxidant mechanism (IV), as the ultraviolet absorber, may, for example, be an ultraviolet absorber such as a 2-transbasic or a phenyl benzotriazine or a benzoic acid vinegar. UV absorbers, etc. The antistatic agent may be any of a polymer type, an oligomer type, and a monomer type. As a lake slip 154840.doc 201202761 Agents: Listed high-grade fatty acid amines such as fentanic acid, oleic acid, and stearic acid, etc. Examples of the nucleating agent include a sorbitol-based nucleating agent, an organic galvanic nucleating agent, and a high-knife nucleating agent such as a polyethylene sulfonate. As the anti-blocking agent, both the inorganic type and the organic type can be used in the form of a sphere or a shape close thereto. [These additives can be used in combination. The protective film formed of a polypropylene resin film used in the polarizing plate of the present invention can be obtained by forming a film of the above polypropylene resin. The protective film formed of the polypropylene-based resin film is preferably excellent in transparency. Specifically, the total haze value measured in accordance with JIS K 7105 is preferably 1% by weight or less. Further, the protective film formed of the polypropylene resin film is preferably a film having a small alignment, that is, a film having a small phase difference. Specifically, the in-plane retardation value is preferably % _ lower' or more preferably 10 Å lower. Therefore, in order to make the total haze value and the phase difference value of the obtained polypropylene resin mold (original film) within this range, it is preferred to appropriately select the film forming conditions or thickness. From poly μηι ~ 200 or less. Μη or so. More preferably, it is 10 μm or more, and more preferably 15 is a film forming method of a polypropylene resin, and is not particularly limited, and may be an extrusion molding method from a refining resin; a resin dissolved in an organic solvent in a flat plate A solvent-casting method in which a solvent is removed to form a film, and the like, a polypropylene resin film in which the in-plane retardation is substantially reduced can be obtained by the film forming method. The method for producing a polypropylene resin film by extrusion molding is described in detail 154840.doc -15-201202761. In this method, 'the polypropylene resin is melt-kneaded by the rotation of the screw in the extruder.' The temperature of the molten sheet extruded from the τ-type die is 18 generations. c. Left and right 1 At this time, when the temperature of the wire-melt piece is lower than the weight, the extension (4) is sufficient, and the thickness of the obtained shape becomes uneven - 'the film may have a phase difference spot. Further, when the temperature exceeds 300 C, deterioration or decomposition of the resin is likely to occur to cause foaming in the sheet or to contain carbides. The extruder can be a single screw extruder or a twin screw extruder. In the case of a single-axis extruder, the ratio L/D of the length L to the diameter D of the screw is about 24 to 36, and the space of the thread groove of the resin supply portion is V] and the groove of the resin metering portion. The ratio of the space volume % = the ratio of 1.5 to 4 left; &, and the full-thread type, the barrier type, and the screw of the type of the Maddox type kneading portion. From the viewpoint of suppressing the deterioration or decomposition of the polyacrylic resin, it is preferable to use a barrier screw having an L/D of 28 to 36 and a compression ratio of Vi/Va 2 5 to 3 5 : In order to suppress deterioration and decomposition of the polypropylene resin, the extruder is preferably a nitrogen atmosphere or a vacuum. Further, in order to remove the volatile gas generated by degrading or decomposing the polymer, it is also preferred to provide a hole having a diameter of 1 mmW at the front end of the extruder to increase the resin pressure before the extruder. The front end portion of the extruder is raised by the arrangement of the outlet holes: the resin pressure means that the back pressure of the front end portion is increased, whereby the diameter of the outlet hole used for the stability of the ancient extrusion is more preferable; Two mm^° The T-die used for extrusion is preferably a small 154840.doc 201202761 high-low-difference, damaged τ-type die on the surface of the resin flow path, and the 'mould lip part is preferably The material of the molten polypropylene resin having a small coefficient of friction is plated or coated, and the tip end of the lip is ground to a sharp edge shape of 〇·3 or less. Examples of the material having a small coefficient of friction include a tungsten carbide-based, a special key layer of the alloy, and the like. By using such a Τ-type die, it is possible to suppress the occurrence of eye stains, and at the same time, it is possible to suppress the mold line, and thus a resin film excellent in uniformity in appearance is obtained. The jaw type die preferably has a manifold shape of a hanger and satisfies the following conditions (Α) or (Β), and more preferably satisfies the condition (c) or (D). (A) When the width of the lip of the T-die is less than 15 mm·· The length of the thickness of the τ-type die> 180 mm, (B) The width of the lip of the T-die is 15 mm or more Time: thickness direction of the τ-type die> 220 mm, (c) when the width of the lip of the T-die is less than 1500 〇1〇1: the length of the height of the τ-type die> 2 50 mm, ( D) When the lip width of the T-die is 15 〇〇mm or more: the length of the τ-type die is 280 mm. By using a τ-type die that satisfies such conditions, it is possible to adjust the flow of the (tetra)-type polypropylene resin inside the τ-type die and to extrude while suppressing thickness unevenness in the lip portion. A protective film formed of a polypropylene resin film which is more excellent in thickness precision and more uniform in phase difference. Further, from the viewpoint of suppressing the extrusion variation of the polypropylene resin, it is preferable to mount the gears between the extruder and the T-die through the connector. Further, in order to remove foreign matter present in the polypropylene resin, it is preferred to install a leaf disc filter. Λ v 154840.doc 201202761 The required polypropylene resin film can be cooled in a metal by a molten sheet extruded from a τ-type die (also known as a chill roll or a cast) It is sandwiched between a contact roll containing an elastomer which is pressed and rotated in the circumferential direction of the metal cooling roll, and is cooled and solidified to obtain "At this time, the contact with the elastomer can directly become a surface of the elastomer such as rubber. The contact roller may also be a contact roller coated with a surface of the elastomer roller by a metal sleeve. The surface of the elastomer is used to cover the surface of the outer cylinder by a metal sleeve, usually in metal. A molten sheet of a polypropylene resin is directly sandwiched between the cooling roll and the contact roll to be cooled. On the other hand, when the surface is used as the contact of the elastomer, the biaxially stretched film of the thermoplastic resin may be interposed between the molten sheet of the polypropylene resin and the contact. When the molten sheet of the polypropylene resin is sandwiched between the cooling roll and the contact roll as described above and cooled and solidified, it is preferable to lower the surface temperature of the cooling roll and the contact roll in advance to rapidly cool the molten sheet. For example, it is preferred to adjust the surface temperature of the two rolls to Ot: 〜30. (The range of: If the surface temperature exceeds 3 〇 ° C, the cooling and solidification of the molten sheet takes time, so that the crystal component in the polypropylene resin grows, and the obtained film may become poor in transparency. On the other hand, if the surface temperature of the roll is lower than 〇〇c, the surface of the metal chill roll is dew condensation and water droplets adhere thereto, which tends to deteriorate the appearance of the film. The metal chill roll used is Since the surface state is transferred to the surface of the polypropylene-based lunar film, it is possible to reduce the thickness precision of the resulting polypropylene-based resin film in the case where the surface has irregularities. Therefore, the surface of the metal cooling roll is preferably In order to be as mirror-like as possible. Specifically, the coarseness of the surface of the cooling surface of the gold 154840.doc 201202761 is expressed by a standard series of maximum heights, preferably 0.3 S or less, more preferably 〇.1 s~〇 .2 S. A contact roller which forms a pinch portion together with a metal cooling roll, and the surface hardness of the elastomer is measured by a spring-type hardness test (eight-shape) prescribed in JIS K 63〇1, preferably 65~ 8 0' more preferably 7 〇 8 8 by using such a rubber roller of surface hardness, it is easy to uniformly maintain the line pressure applied to the molten sheet, and there is no melting between the metal chill roll and the contact roll. In the case of a sheet weave (resin accumulation), the film is easily formed into a film. The pressure (line pressure) when the molten sheet is pinched is determined by the pressure of the metal chill roll pressing the contact roll. The line pressure is preferably 5 〇N. /Cm 〜 3 〇〇 N / cm, more preferably 100 N / cm ~ 250 N / Cme by making the line pressure to the above range, and without forming a cofferdam, it is easy to maintain a certain line pressure, When a biaxially stretched film of a thermoplastic resin is interposed between a metal cooling roll and a contact roll and a molten sheet of a polypropylene resin, the thermoplastic resin constituting the biaxially stretched film is The resin which does not strongly heat-adhere and adhere to the polypropylene-based resin may, for example, be polyester, polyamide, polyethylene, polyvinyl alcohol, ethylene-vinyl alcohol copolymer, polyacrylonitrile, etc. Good size change due to humidity, heat, etc. Small polyester. In this case, the thickness of the biaxially stretched film is usually about 5 μm to about 5 μm, preferably from 1 μm to 30 μm. In this method, the lip of the self-drying die is preferably used. The distance (air gap) between the metal cooling roller and the contact roller is 200 mm or less, more preferably 160 mm or less. The molten sheet extruded from the τ-die from the lip to the roller 154840 .doc •19· 201202761 is extended and easy to produce alignment. By shortening the air gap in the above manner, a film with a smaller alignment can be obtained. The lower limit of the air gap is the diameter and contact of the metal cooling roller used. The diameter of the roll and the shape of the front end of the lip to be used are usually 50 mm or more. Further, the processing speed at the time of producing the polypropylene resin film by this method is determined by the time required for cooling and solidifying the molten sheet. Decide. If the diameter of the metal cooling roll used is increased, the distance between the molten sheet and the cooling roll becomes longer, so that it can be manufactured more quickly. Specifically, in the case of using a metal cooling roll of 6 mm mm #, the processing speed is at most about 5 claws/min to 20 m/min. The molten sheet which is sandwiched between the metal cooling contact roller and the contact roller is cooled and solidified by contact with the roller. Then, the end portion was cut off as necessary, and then taken up by a coiler to obtain a rolled polypropylene resin film. In this case, in order to protect the surface between the rolled polypropylene resin films, the surface protective film formed of another thermoplastic resin may be wound on one side or both sides thereof. When the molten sheet of the polypropylene resin is sandwiched between the metal cooling roll and the contact roll together with the biaxially stretched film formed of the thermoplastic resin, the biaxially stretched film may be formed into one of the surfaces. Protective film. As described above, it is possible to produce a film formed of a polypropylene resin film. A haze can be imparted to the polypropylene resin film. The method of imparting haze is not particularly limited. For example, a method of mixing inorganic fine particles or organic fine particles in the raw material resin may be used, and on the surface of the polypropylene resin film opposite to the surface to which the second polarizing film is adhered. A method of coating a coating liquid in a resin binder by mixing inorganic fine particles or organic fine particles with 154840.doc • 20·201202761. Examples of the inorganic fine particles include silica dioxide, colloidal silica, oxidized, oxidized sol, sulphate, oxidized sulphur dioxide, talc, talc, mica, calcium carbonate, Calcium phosphate or the like is a representative example. Further, as the organic fine particles, resin particles such as crosslinked polyacrylic acid particles, crosslinked polystyrene fibers, crosslinked polymethyl methacrylate particles, polyoxyxylene resin particles, and polyimine particles can be used. On the surface of the polypropylene resin film opposite to the surface to which the first polarizing film is adhered, a surface treatment such as a hard coating treatment or an antistatic treatment may be applied in addition to the above-described antiglare treatment (haze imparting treatment). Further, a coating layer containing a liquid crystal compound or a high molecular weight compound thereof may be formed. For the polypropylene tree used in the present invention, an easy-adhesion layer can be imparted. The method for forming the polypropylene-based resin film to which the easy-adhesion layer is applied is not particularly limited. For example, a method of forming an easy-adhesion layer on a molten sheet extruded by a τ-type die can be used; A method of forming an easy-adhesion layer on a polypropylene resin film obtained by cooling and solidifying between a cooling and a contact; and a method of forming an easy-adhesion layer before or after bonding with a polarizing film. The contact layer may be provided on both sides of the polypropylene resin film or on one side of the polarizing film. The component constituting the easy adhesion layer is not particularly limited, and examples thereof include a polar group in the skeleton, a relatively low molecular weight, and a glass transition temperature. It is also relatively low in polysm, polyamine, acrylic, etc. In addition, it may contain a crosslinking agent, an organic or inorganic filler, a surfactant, a lubricant, etc. as needed. 154840.doc -21 - 201202761 In the first polarizing plate, an adhesive or adhesive for bonding the liquid crystal cell and the polarizing plate can be formed on the surface of the first polarizing film opposite to the surface on which the polypropylene resin film is bonded. Layer On the surface of the second polarizing film opposite to the surface on which the polypropylene resin film is bonded, a transparent film such as a protective film or an optical compensation film may be laminated, and an adhesive or adhesive may be formed on the transparent film. The transparent film may, for example, be a cellulose resin film such as a triethyl cellulose film (TAC), an olefin resin film, an acrylic resin film, a polyester resin film, or the like. An optical functional film to be described later is formed on the transparent film, and a layer of an adhesive or a binder is formed on the optical functional film. The optical compensation film includes, for example, a cellulose-based resin film having a phase difference adjustment function. a film of a compound, a film having a compound having a phase difference adjusting function applied to the surface of the cellulose resin film, a film obtained by uniaxially stretching or biaxially stretching the cellulose resin film, or the like. The olefin-based resin film is uniaxially stretched or biaxially stretched to form an optical compensation film. It is used in a liquid crystal panel for a large liquid crystal television, particularly a liquid crystal panel having a vertical alignment (VA) mode liquid crystal cell. When the polarizing plate group of the present invention is used, the optical compensation film is preferably an extension of the ring-leak-type resin film from the viewpoint of optical characteristics and durability. a film formed of a thermoplastic resin derived from a unit of a monomer containing a cyclic olefin (cycloolefin) such as norbornene or a polycyclic norbornene-based monomer. The cycloolefin-based resin film may be a single cycloolefin. a ring-opening polymer or a hydride of a ring-opening copolymer of two or more kinds of cyclic olefins, which may also be a cyclic olefin and a chain olefin and/or an aromatic group having a soldering base 154840.doc -22-201202761 An addition copolymer of a compound or the like. Further, a product in which a polar group is introduced into a main chain or a side chain is also effective. 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 olefins include ethylene, propylene, and the like. Examples of the aromatic compound having a vinyl group include styrene, a-f-based styrene, and a core alkyl-substituted styrene. Such a copolymer allows the unit derived from a monomer composed of a cyclic olefin to be 5^) mol% or less 'for example, 15 mol% to 5 (%) mol% or so to form a ring-dense hydrocarbon and a chain olefin. And in the case of a terpolymer having a vinyl aromatic compound, 'a monomer derived from a cyclic olefin may be a relatively small amount such as 2. In the terpolymer, the unit derived from the monomer composed of the bond-like flue-cured tobacco is usually about 5 mol% to 8 mol%, and the unit derived from the monomer composed of the aromatic compound having a vinyl group is usually #料, Moer% or so. 'The thermoplastic ring that is sold by Feng Xiao is a small one'. ~ π Tianyu's Topas

"T〇pas, JSR (shares) sales of "art〇&gt;j I , ART〇N" sold by Advanced Polymers GmbH, ~0 dirty" sold by Japanese ΖΕΟΝ (shares), and "Cai Shun", by The APEL sold by Mitsui Chemicals Co., Ltd. (both trade names) and the like can be preferably used. Such a === film' can be obtained to obtain a cycloolefin resin film. As a film forming method, a known method such as a melt method or a melt extrusion method is used. In addition, for example, "SCA40", which is sold by Shui Shui Chemical Industry Co., Ltd., and S-SINA, which is sold by Sakamoto Co., Ltd., is sold as "Curry FlLM" (all products) The cycloolefin-based resin film for film formation such as 154840.doc -23-201202761, or such a cycloolefin-based resin film which uses β as an optical compensation film, preferably extends in at least one direction. Thereby, an appropriate optical compensation function can be imparted, which contributes to the expansion of the viewing angle of the liquid crystal display device. The in-plane retardation value R〇 of the extended cycloolefin resin film is preferably from 40 nm to 100 nm, more preferably 4 〇nm~8〇nm. If the right-in-plane phase difference RQ is less than 4〇nm or exceeds 1〇〇nm, there is a tendency to reduce the resilience of the panel (4). The thickness direction phase difference Rth is preferably from 80 nm to 300 nm, more preferably from 100 (10) to 250 nm. If the thickness direction phase difference Rth is less than 80 (10) or exceeds 300 nm, the viewing angle compensation capability for the panel is the same as described above. a tendency to decrease. Furthermore, the extended ring-dilute hydrocarbon (tetra) ester The in-plane phase difference R and the thickness direction phase difference ~ are expressed by the following equations: R 〇 = (nx - ny) xd 八 th - unx + ny ) / 2 - nz ] xcl Here, ~ is The refractive index of the in-plane retardation axis of the extended ring-diffuse resin film is the in-plane direction of the in-phase axis (orthogonal to the in-plane phase axis direction), η Μ,, The direction of the retardation axis in the surface of the surface is orthogonal =: is the refractive index of the thickness of the extended ring-shaped hydrocarbon resin film, and d is the thickness of the extended material (4) tree (4). In addition to the rate of elongation, it is also possible to select (4) the temperature of the film by the appropriate selection of the extension ratio and temperature, heat setting (the preheating temperature of the film after stretching, the deformation mitigation degree of the film, etc.) Including the temperature ^ degree of cold zone mitigation material (4) 1 by relative characteristics. For example, the extension ratio is better: the preferred refraction described above is · 05 times ~ 1,6 times the range, more I54840.doc -24· 201202761 is 1.1 times or more and is .5 times or less. In the case of biaxial stretching, the stretching ratio in the maximum extending direction may be the above range. When the thickness of the cycloolefin-based resin film is too thick, the workability is better than I', and the transparency is liable to decrease, and the weight of the polarizing plate is increased. Therefore, the thickness of the extended cycloolefin-based resin film is higher. It is preferably about 40 μm to 80 μm. In the first polarizing plate, the polypropylene resin film and/or the surface layer on the opposite side of the surface of the i-th polarizing film to which the polypropylene resin film is bonded are provided. An optical functional film can be adhered to the transparent film as a protective film by an adhesive. As the optical functional film which can be adhered to the transparent film as a protective film, in addition to the above-mentioned cellulose resin film or cycloolefin resin film In addition to the optical compensation film of the base material, for example, an optical compensation film in which a liquid crystal compound is coated on the surface of the substrate and an alignment film formed of a polycarbonate resin, or the like can be given. In addition, as the optical functional film which can be adhered to the polypropylene resin film, a reflective polarizing film which transmits light of a certain polarized light and reflects polarized light having the opposite property is exemplified, and has a reflection function on the surface. A reflective film; a transflective film having both a reflective function and a transmissive function. A commercially available product that is equivalent to an optical compensation film that is coated with a liquid crystal compound and is aligned with the surface of the substrate. "Wv film" sold by Fujifilm Co., Ltd., "NH FILM" sold by Shin Sakamoto Oil Co., Ltd. And "LC FILM" (all product names). As a commercial product equivalent to a reflective polarizing film that transmits light of a certain kind of polarized light and reflects light of a polarized light of the opposite nature, there is a "dbEF" sold by 3M Company (Sumitomo 3 PCT in Japan). Name) and so on. 154840.doc -25-201202761 Next, a method of laminating a polypropylene resin film on the first polarizing film and a method of laminating a transparent film such as the protective film or the optical compensation film as necessary will be described. As a method of these films in the surface area of the i-th polarizing film, a method of bonding using an adhesive is usually employed. In the case where an adhesive is used on both sides of the second polarizing film, an adhesive of the same kind on both sides may be used, or a different type of adhesive may be used. As the adhesive, from the viewpoint of making the adhesive layer thin, the water-based adhesive can also be used to dissolve the adhesive component in the water or to make the adhesive into a water. Adhesive. For example, a composition using a polyvinyl alcohol resin or a polyurethane resin as a main component is preferable as the binder. When a polyvinyl alcohol-based resin is used as a main component of the binder, the polyvinyl alcohol-based resin may be a carboxyl group-modified polyvinyl alcohol or an ethyl acetonitrile group in addition to a partially saponified polyvinyl alcohol or a fully saponified polyvinyl alcohol. A modified polyvinyl alcohol-based resin such as modified polyvinyl alcohol, hydroxymethyl-modified polyvinyl alcohol, or amine-modified polyvinyl alcohol. When a polyvinyl alcohol-based resin is used as the binder component, the binder is often prepared as an aqueous solution of a polyvinyl alcohol-based resin. The concentration of the polyvinyl alcohol-based resin in the adhesive is usually from about 1 part by weight to about 10 parts by weight based on the parts by weight of the hydrazine, preferably! Parts by weight to 5 parts by weight. In the adhesive containing a polyethylene glycol-based resin as a main component, in order to improve the adhesion, it is preferred to add a curable component such as glyoxal or a water-soluble epoxy resin or a crosslinking agent. Examples of the water-soluble epoxy resin include a polyamine polyamine epoxy resin obtained by reacting a surface alcohol with a polyamine polyamine, which is composed of diethylenetriamine and triethylenetetramine. A polyalkylene polyamine 154840.doc -26-201202761 is obtained by reacting with a dicarboxylic acid such as adipic acid. As a commercial product of the polyamine polyamine epoxide tree, there are "Sumirez Resin 650" sold by Sumika Chemtex Co., Ltd., and "WS-525" sold by Japan PMC (version). Etc., these can be preferably used. The amount of the curable component or the crosslinking agent to be added is usually 1 part by weight to 100 parts by weight, preferably 1 part by weight to 5 parts by weight, based on the parts by weight of the polyvinyl alcohol-based resin i 。. If the amount of addition is small, the effect of improving the adhesion is small. On the other hand, if the amount of addition is large, the adhesive layer tends to be brittle. When a polyurethane resin is used as a main component of the binder, a mixture of a polyester ionomer type amine ester resin and a glycidyloxy group-containing compound can be exemplified as an appropriate binder composition. The polyester ionomer type urethane resin referred to herein is an amine ester resin having a polyester skeleton, and a small amount of an ionic component is introduced therein (hydrophilic component p. The ionomer type amine ester resin is not used for emulsification The agent is emulsified directly in water to form an emulsion, and is therefore suitable as a water-based adhesive. The polyester-based ionomer-type urethane resin is known per se. For example, JP-A-H07-975-4 discloses a vinegar. An ionomer-type urethane resin is exemplified as a polymer dispersant for dispersing a phenol-based resin in an aqueous medium, and is disclosed in Japanese Patent Laid-Open Publication No. Hei. Japanese Patent Publication No. 5-1081817 discloses a mixture of a polyester ionomer-type amine ester resin and a compound having a glycidoxy group as a binder, and a cycloolefin resin film is bonded to a polarized light formed of a polyvinyl alcohol resin. The form of the film. As a method of bonding a polypropylene resin film and/or a transparent film to the surface of the first polarizing film using a binder, a conventionally known method can be used, for example, 154840.doc •27·201202761 By casting method, meyer bar coating method, gravure coating method, comma coating method, doctor blade method, die coating method, dip coating method, spray method, etc., and A method in which a bonding agent is applied to a bonding surface of a polarizing film and/or a film to be bonded thereto, and the two are superposed on each other. The casting method is to form a film as a coating object in a substantially vertical direction, a substantially horizontal direction, or a method in which the adhesive is moved in an oblique direction between the two, and the adhesive is allowed to flow down to the surface thereof and spread. After the pure agent is applied by the method as described above, the first polarizing film and the same are used The film is bonded and bonded to bond the two. Further, it is also preferable to use a method in which a bonding agent is added between the first polarizing film and the film to be bonded thereto, and then a pair of rollers or the like is used. The laminate is pressed and uniformly rolled. In this case, as the material, metal, rubber, or the like can be used. When passing between two parents, each of the laminates may be the same material or may be Different materials. In addition, 'adhesive layer after bonding with the above-mentioned pressure roller or the like before drying or curing The thickness is preferably 5 (four) or less, and preferably 〇〇 1 (four) or more. For the bonding surface of the W-th film and/or the film to be bonded thereto, in order to improve the adhesion, plasma treatment, electric chapter treatment, and appropriate treatment may be performed. Surface treatment such as ultraviolet irradiation treatment, flame (7) treatment, saponification treatment, etc. As a method of chemical treatment, 'the method of immersing in an aqueous solution such as argon oxide or nitrogen oxide clock can be cited. ''The above-mentioned water-based adhesive is bonded. In the case of 'drying, the drying layer is usually dried and solidified. The drying treatment can be carried out, for example, by blowing hot air. The drying temperature is expressed by ambient temperature from 4 (TC~100t left 154840, doc -28·201202761) The range of the right, preferably 60 ° C to 1 ° ° C is appropriately selected. The drying time is, for example, about 20 seconds to 1200 seconds. The thickness of the adhesive layer after drying is usually about η μηι 5 μπι, preferably 2 μπι or less, more preferably i μηι or less. If the thickness of the dot layer is too large, the appearance of the polarizing plate tends to be poor. After the drying treatment, it is aged at a temperature above room temperature for at least half a day, usually several days or more, to obtain sufficient adhesive strength. This aging is typically carried out in a state of being wound into a roll. The preferred curing temperature is 30 in terms of ambient temperature. (: ~50 ° C range, more preferably 35 ° C or more, 45. (: below. If the curing temperature exceeds 50. (:, in the coiled state, it is easy to produce so-called "winding bond" That is, the phenomenon that the wound film shrinks to cause wrinkles. Further, the humidity at the time of ripening is not particularly limited, and is preferably selected so that the relative humidity is in the range of about 0% to 70%. The ripening time is usually i days. In the case of a photocurable adhesive, a photocurable adhesive can be used. a mixture of a resin and a photo-cationic polymerization initiator, etc. When a polarizing film and a film to be bonded thereto are bonded together by a photocurable adhesive, after photo-curing, the photo-curable adhesive is irradiated by irradiation with an active energy ray. The curing agent of the active energy ray is not particularly limited. Preferably, the active energy of the luminescent distribution is below the wavelength of 4 〇〇 nm. Specifically, it is preferred to use a low-pressure mercury lamp, a medium-pressure mercury lamp, and a high-pressure mercury lamp. , ultra-high pressure mercury lamp, chemical lamp, black Lamp, microwave excited mercury lamp, metal toothed lamp, etc. The light irradiation intensity 'light irradiation time' of the photocurable adhesive is appropriately determined according to the composition of the photocurable adhesive, and the adhesion after the active energy ray irradiation The thickness of the agent layer is usually 154840.doc •29-201202761 0·01 μιη to 10 μιη or so, preferably (Μ μηη or more, and preferably 5 μηη or less. Photocuring by irradiation of active energy rays When the adhesive is cured, it is preferable that the functions of the polarizing plate such as the polarization degree, the transmittance, the hue of the first polarizing film, and the transparency of the transparent film such as the polypropylene resin film or the optical compensation film are not lowered. (Second polarizing plate) The second polarizing plate is used as a polarizing plate on the front side (viewing side) of the liquid crystal panel, and has an anti-glare property in a single-layer layer of the second polarizing film formed of a polyvinyl alcohol-based resin. The second polarizing film is obtained by specifically adsorbing and aligning a dichroic dye on a uniaxially stretched polyvinyl alcohol-based resin film, and the first polarizing film can be used in the same manner. Explained The polarizing film of the first polarizing film and the second polarizing film may be the same as the outer shape (thickness, etc.), the material, the manufacturing method, etc. The haze value of the anti-glare protective film is in the range of 3% to 45%. If the haze value is lower than 3 /〇, it will not be able to obtain sufficient anti-staining effect. In addition, if it is higher than 4 $%, the surface will be self-contained and the visibility will decrease. In the case of high light diffusivity, The haze value of the protective film is in the range of 20% to 45° /. Here, the haze value is measured by a method according to JIS K7B6, and an anti-glare protective film having a haze value of 3% to 45%, for example, It can be produced by a method of forming a coating film containing organic fine particles or inorganic fine particles on the surface of a resin film, a method of mixing inorganic fine particles or organic fine particles with a resin, and forming a film, but is not limited thereto. As a method of forming the above-mentioned coating film, for example, a method of applying a binder component formed of a curable resin composition and a coating liquid of 154840.doc 201202761 organic fine particles or inorganic fine particles on the surface of a resin film can be exemplified. Examples of the inorganic fine particles include oxy-cut n-oxygen cut, alumina, alumina sol, aluminosilicate, alumina-cerium oxide composite oxide, kaolin, talc, mica calcium carbonate, calcium phosphate, and the like as representative examples. . Further, examples of the organic fine particles include crosslinked polyacrylic acid particles, methacrylic acid f/styrene copolymer resin particles, crosslinked polystyrene particles, crosslinked polymethyl acrylate vinegar particles, and polylithic eve Resin particles such as oxy resin particles and polyanilin particles. A conventionally known method can be employed as a method of forming a resin which is a substrate described above or a resin in which organic fine particles or inorganic fine particles are mixed into a film. The thickness of the obtained antiglare protective film is, for example, i 〜 12 〇 μηη, preferably 20 μπι to 1 〇〇 μιη. In the present specification, the term "thickness of the anti-glare protective film" means the maximum thickness of the surface of the anti-glare protective layer from the surface in contact with the second polarizing film to the opposite side. Therefore, when the anti-glare protective film has irregularities, the thickest portion becomes the thickness of the anti-glare protective film. Examples of the resin that serves as the substrate of the anti-glare protective film include a cellulose resin such as triacetin cellulose (TAC), an olefin resin, an acrylic-based secret, and a poly-p-ethylene bromide. Polyester resin, etc. Among them, a polyester resin film is particularly preferably used as an antiglare protective film. The polyester-based resin film which is preferably used as the anti-glare protective film in the second polarizing plate, and examples thereof include a polyethylene terephthalate film and a polyethylene naphthalate film. Among them, it is particularly preferable to use a polyethylene terephthalate film. A resin composed of a polyethylene terephthalate-based repeating unit of 8 〇 mol% or more of p-benzene 154840.doc -31-201202761 diformate. Examples of other copolymerization components include: m-dicarboxylic acid, 4,4′-dicarboxybiphenyl, 4,4·-dicarboxybenzophenone, bis(4-carboxyphenyl)ethene, and hexan Examples of the diterpene acid component such as acid, sebacic acid, 5-(sodium base) isophthalic acid, and 1,4-dicarboxycyclohexane, and examples thereof include propylene glycol, butanediol, neopentyl glycol, and A glycol component such as ethylene glycol, cyclohexanediol, an Ethylene oxide addition product of Azure A, polyethylene glycol, polypropylene glycol, and polytetramethylene glycol. These dicarboxylic acid components and diol components can be used in combination of two or more kinds as needed. Further, a hydroxycarboxylic acid such as p-hydroxybenzoic acid or p-β-p-ethoxyethoxybenzoic acid may be used as a copolymerization component. Such other copolymerization components may contain a small amount of a compound containing a guanamine bond, an amine ester bond, an ether bond, a rabbit acid vinegar bond or the like. As a method for producing polyethylene terephthalate, a so-called direct polymerization method in which terephthalic acid and ethylene glycol are directly reacted, and transesterification of dimethyl terephthalate with ethylene glycol can be applied. Any manufacturing method such as a transesterification reaction method of the reaction. Further, a known additive may be contained as needed. For example, it may contain a lubricant, an anti-blocking agent, a heat stabilizer, an antioxidant, an antistatic agent, a light stabilizer, an impact modifier, and the like. However, since transparency is required in optical applications, it is preferred that the amount of the additive be kept to a minimum. By stretching the raw material resin into a film shape and performing an elongation treatment, an extended polyethylene terephthalate film can be produced. The extension can be biaxially extended by a uniaxial extension extending in the MD direction (flow direction) or the TD direction (direction orthogonal to the flow direction), biaxially extending in the ?^!) direction and the TD direction, The MD direction is also not extended in the direction of the TD direction = 154840.doc -32- 201202761 Any method such as extension is performed. By carrying out the stretching operation, it is possible to obtain a polyparaphenylene having a high mechanical strength: formic acid. The thus stretched polyethylene terephthalate film, especially the biaxially stretched polyethylene terephthalate film, is difficult to see interference spots in the liquid crystal display device using the polarizing plate of the present invention. The tendency is therefore preferred. The polyethylene terephthalate film preferably has an in-plane retardation value of 〇〇〇, 〇〇〇 nm or more, more preferably 3 〇〇〇 nm or more. In the case of using a polyethylene terephthalate film having an in-plane retardation value r〇 of less than 1, 〇〇〇nm, there is a tendency to have a significant color from the front, and the surface of the polyethylene terephthalate The upper limit of the internal phase difference R 至 is at most 1 〇, which is sufficient around 〇〇〇 nm. The easy-bonding layer can be imparted to the poly(p-diphenyl) acid film. The easy-adhesion layer is a layer provided to improve the adhesion between the polarizing film and the polyethylene terephthalate film. Forming an easy-adhesion layer on the film of the polyethylene terephthalate film, for example, a method of forming an easy-adhesive layer on the film on which all extension steps are completed, and extending the polyethylene terephthalate In the step (ie, between the longitudinal stretching step and the lateral stretching step), a method of forming an easy-adhesion layer, a method of forming an easy-adhesion layer before or after bonding with the polarizing film, and the like. In the case of producing a biaxially stretched film, from the viewpoint of productivity, it is preferred to use a method in which polyethylene terephthalate is longitudinally stretched to form an easy-adhesion layer and then laterally extended. The easy-adhesive layer can be formed on both sides of the poly(p-phenylene)-ply film or on the single side of the adhesive film and the polarizing film. The component constituting the easy-adhesion layer may be, for example, a polyester resin having a polar group in the skeleton, a relatively low molecular weight, and a relatively low glass transition temperature, an amine δ-based resin, an acrylic resin, or the like. In addition, 154840.doc -33- 201202761 cross-linking agent, organic or inorganic filler, surfactant, lubricant, etc. may be contained as needed. Such a polyethylene terephthalate film can be easily obtained as a commercial product, and for example, it can be exemplified by Diafoil (manufactured by Mitsubishi Resin Co., Ltd.), Hostaphan (manufactured by Mitsubishi Resin Co., Ltd.), FUSION (for example, manufactured by Mitsubishi Resin Co., Ltd.). Mitsubishi resin (manufactured by Mitsubishi Plastics Co., Ltd.), TEIJIN TETORON FILM (manufactured by Teijin DuPont Films Co., Ltd.), Melinex (manufactured by DuPont Teijin Films Co., Ltd.), Mylar (manufactured by DuPont Teijin Films Co., Ltd.), Teflex (manufactured by DuPont Teijin Films Co., Ltd.) DuPont Teijin Film Co., Ltd., Toyobo Ester Film (Toyobo Co., Ltd.), Toyobo Espet Film (Toyobo Co., Ltd.), Cosmoshine (Toyobo Co., Ltd.), Crisper (Toyobo Co., Ltd.) Manufacturing), Lumirror (Toray Advanced Film (manufactured)), Emblon (Unitika), Embed (Unitika), Skyrol (SKC), COFIL (manufacturing)), Ruitong polyester film (manufactured by Ruitong), Taihe polyester film (manufactured by FUTAMURA CHEMICAL), and the like. In the second polarizing plate, a layer on the side opposite to the surface of the second polarizing film opposite to the surface on which the anti-glare protective film is bonded can form a layer of an adhesive or a binder for bonding the liquid crystal cell to the polarizing plate. In addition, a transparent film such as a protective film or an optical compensation film may be laminated on the surface of the second polarizing film opposite to the surface on which the anti-glare protective film is bonded, and an adhesive or adhesive may be formed on the transparent film. Layer of the agent. Examples of the transparent film include a cellulose resin film such as a triacetyl cellulose film (TAC), an olefin resin film, an acrylic resin film, and a polyester resin film. As a polyester resin film, a polyethylene terephthalate film is mentioned. In the case where a polyethylene terephthalate film is used as the transparent film, the thickness thereof is preferably in the range of 20 μm to 50 μΓη from 154840.doc -34 to 201202761. If a polyethylene terephthalate film having a thickness of less than "Melon" is used, the treatment of the film becomes difficult, and on the other hand, if a polyethylene terephthalate film having a thickness exceeding 5 μμηΐ2 is used, It is difficult to reduce the thickness of the polyethylene terephthalate film. The haze can be used in the range of 〇1% to 4% by weight. Preferably, the haze value is 〇1% to 1%. The range is more preferably in the range of 0.1% to 5%. The haze value is defined as the ratio of the diffuse transmittance to the total light transmittance as specified in JIS κ 7136, which can be measured by a commercially available haze meter. An optical functional film may be laminated on the transparent film, and a layer of an adhesive or a binder may be formed on the optical functional film. The optical compensation film and the optical functional film may be similarly described for the second polarizing plate. A method of laminating a transparent film such as an antiglare protective film and/or a protective film or an optical compensation film on the second polarizing film can be similarly applied to the first polarizing plate. In the case where an adhesive is used on both sides of the film, the bonding of the same kind of two sides can be used. Further, the adhesive used in the production of the first polarizing plate may be the same as or different from the adhesive used in the production of the second polarizing plate. &lt;Liquid Crystal Panel and Liquid Crystal Display Device&gt; The liquid crystal panel of the present invention uses the liquid crystal panel of the polarizing plate group of the present invention, and specifically, the first polarizing plate, the liquid crystal cell, and the second polarizing plate are sequentially disposed. . Here, the first polarizing plate is disposed on the surface opposite to the surface on which the polypropylene resin film is laminated, and the liquid crystal cell is opposed to the first polarizing film, and the second polarizing plate is laminated with the second polarizing film. The glare protects the vines 154840.doc •35·201202761 The opposite side of the film surface and the liquid day i sign the oil bark /, Xin Ri Ri 7G relative to the way. In other words, the surface of the first polarizing plate m polarizing film opposite to the surface on which the polypropylene resin film is laminated is an adhesive surface 'adhesive' (4) Yang He difficult poetry liquid crystal cell, or laminated on the ith polarizing film. The area layer on the opposite side of the surface of the polypropylene resin is adhered to the liquid crystal cell as a protective film or a transparent film such as an optical compensation film or an optical functional film laminated thereon. Similarly, the second polarizing plate is a bonding surface on the side opposite to the surface on which the anti-glare protective film is laminated on the second polarizing film, and is adhered to the liquid crystal cell by using an adhesive or an adhesive or by the second polarizing film. A transparent film such as a protective film or an optical compensation film or an optical functional film laminated thereon is adhered to the liquid crystal cell as an area layer on the opposite side to the surface on which the anti-glare protective film is laminated. As the liquid crystal cell, a conventionally known configuration can be employed, and for example, various types of liquid crystal cells such as a twisted steering column (、) mode and a vertical alignment (VA) mode can be used. In the liquid crystal panel using the polarizing plate group of the present invention, since the polypropylene resin film is used as the protective film of the first polarizing plate, the mechanical strength is improved and the thickness is reduced, and the protective film of the second polarizing plate is used. The color unevenness (interference spot) caused by the phase difference is such that the protective film of the second polarizing plate has a haze value of 3. / 〇 ~ 45% of the range of anti-glare protective film is reduced. In particular, when a polyester film is used as the protective film of the second polarizing plate, the color unevenness (interference spot) due to the phase difference of the protective film is remarkably reduced. Fig. 1 is a schematic cross-sectional view showing an example of a basic layer configuration of a liquid crystal display device of the present invention. The liquid crystal display device 1 shown in FIG. 1 has a backlight 10, a light diffusing plate 50, and a back side polarizing plate including a liquid crystal cell 40 as one surface adhered to a liquid 154840.doc • 36·201202761 crystal unit 40. The polarizing plate 2A and the liquid crystal panel 60 which is the second polarizing plate 30 adhered to the front side polarizing plate on the other surface of the liquid crystal cell 40. The P polarizing plate 2 is sandwiched by the optical compensation film 23 and the polypropylene resin film 24! The polarizing film 21 is a film relay unit 4. Relatively configured. Further, the third embodiment has a configuration in which the second polarizing film 31 is sandwiched between the protective film or the optical compensation film 33 and the anti-glare protective film 34, and the protective film or the optical compensation film 33 is disposed to face the liquid crystal cell 40. Further, in the liquid crystal display device (10) of the present invention shown in Fig. ', the liquid-day day and day panel 6G serves as a backlight for the W-th light sheet 20 as the back-side polarizing plate, that is, the polypropylene-based resin film 24 and the light-diffusing sheet. 50 relative way configuration. The vertical line of the light exit surface of the backlight 1 is substantially parallel to (10). Further, the perpendicular lines of the light incident surfaces of the light diffusing plate 50, the polarizing plate 2, the liquid crystal cell 40, and the second polarizing plate 30 are substantially parallel to the z-axis. Here, the optical diffusing plate 50 is an optical member having a function of diffusing light from the backlight 1 ', for example, a thermoplastic resin can be dispersed in a thermoplastic resin to impart light diffusibility to a thermoplastic resin. A coating layer of a resin composition in which particles are dispersed is provided on the surface of the thermoplastic resin sheet to form a light-diffusing property. The light-diffusing sheet 50 is disposed so as to form a light-emitting surface by forming irregularities or dispersing particles or the like to impart light diffusing properties. The thickness of the light diffusing plate 5 () may be 0.1 with ~5 _ or so. In addition, a bismuth sheet (also referred to as a condensing sheet, for example, "Qing" manufactured by 3M Company, etc. corresponding to the condensing sheet) and a brightness improving sheet may be disposed between the light diffusing plate 5A and the liquid crystal panel 6A. Other optical functional films such as the reflective polarizing film described above. Other Tables 154840.doc •37- 201202761 The optical functional film can also be configured as needed. Further, as the light-diffusing sheet 50, it is also possible to produce a laminated product of a sheet having a surface (four) shape and a light-diffusing sheet (for example, a laminated product described in Japanese Laid-Open Patent Publication No. Hei. No. Hei. An optical sheet of the class that combines other functions with the light diffusing function. In the liquid crystal display device of the present invention, the liquid crystal panel 6〇' of the present invention is similar to the liquid crystal panel, and the mechanical strength is improved and the thickness is reduced, and the color spots (interference spots) are suppressed. Further, the liquid crystal display device of the present invention is not limited to the configuration shown in Fig. 1, and various modifications can be added. For example, as described above, the optical compensation film 23 and/or the protective film or the optical compensation film 33 are not necessarily required and may be omitted. Further, a protective film may be used instead of the optical compensation film 23. Further, the above optical functional film may be laminated on the protective film and/or on the polypropylene resin film 24. The invention is illustrated in more detail below by means of examples, but the invention is not limited to the examples. In the examples, the content and the % and the amount used are based on the mass basis unless otherwise specified. [Production Example 1] Production of a polarizing film The average polymerization degree was about 2,400, and the degree of saponification was 99.9 mol. The polyvinyl alcohol film having a thickness of 75 μm or more was impregnated into the pure water of the child, and then impregnated at 30 ° C in an aqueous solution of iodine/potassium iodide/water having a mass ratio of 0.02/2/100. Then, in an aqueous solution of potassium iodide/boric acid/water having a mass ratio of 12/5/100, it was at 56·5^/y/bei. Next, after washing with pure water of 8 ° C, it was at 65. (: drying is carried out to obtain a polarizing film in which iodine is adsorbed and aligned in polyvinyl alcohol. The stretching is mainly carried out in the steps of iodine dyeing and acid removal treatment, and the total stretching ratio is 5.3 times. 154840.doc •38·201202761 [Manufacturing example 2] Preparation of anti-glare protective film using pentaerythritol triacrylate and polyfunctional amine esterified acrylate (reaction product of hexamethylene diisocyanate and pentaerythritol triacrylate) at a mass ratio of 60/40 in ethyl acetate In the ultraviolet curable resin composition, the ultraviolet curable resin composition containing the leveling agent is used, and the ultraviolet curable resin composition exhibits a refractive index of 1.53 after curing. The methacrylate/styrene copolymer resin particles having an average particle diameter of 3 μm and a refractive index of 1.57 were added to the solid content of the ultraviolet curable resin composition in an amount of 1 part by weight. After the dispersion, 'ethyl acetate was added to make the concentration of the solid component (including the resin particles) 30%, and a coating liquid was prepared. The thickness of the coating film after drying was 4 μηι. The coating liquid was applied onto a triethylene glycol (TAC) film having a thickness of 8 μm, and dried in a dryer set to 6 〇t&gt;c for 3 minutes. The ultraviolet curable resin combination of the film after drying The layer side is irradiated with light from a high-pressure mercury lamp to cure the ultraviolet curable resin composition layer, and a transparent anti-glare protective film (A) formed of a laminate of a cured resin film having irregularities on the surface and a TAC film is obtained. (c) Changing the decyl acrylate/styrene copolymer resin particles in the ultraviolet curable resin composition layer to porous oxidized on a polyethylene terephthalate film having a thickness of 40 μm The ruthenium particles are solidified, and a transparent antiglare protective film (7) formed of a laminate of a cured resin film having irregularities on the surface and a polyethylene terephthalate film is known. The fog of the anti-glare protective film (Α)~(D) was measured using a haze meter "ΗΜ-150" manufactured by Murakami Color Research Institute Co., Ltd., JIS Κ 7136, 154840.doc -39·201202761 degrees. For the sample, in order to prevent warpage, an optical agent is used, and a TAC film having a protective film formed on the surface of the uneven surface is bonded to the glass substrate, and then the haze of the protective film (A) to (D) is measured. The measurement results are shown in Table 1. Transparent bonding, anti-glare protection, anti-glare protection 154840.doc -40- 201202761 [1 &lt;] Haze 13% 24% 44% 19% Particle addition amount m 10 parts 20 parts cn Average particle size 1 I m ί cn im MS c/) C/5 cerium oxide ultraviolet curable resin composition usage (solid content) 100 parts 100 parts 100 parts 100 parts of substrate TAC TAC TAC PET anti-glare protective film g 154840.doc • 41 201202761 Furthermore, in Table 1, TAC represents triacetyl cellulose, and PET represents poly-p-benzene. A bismuth vinegar 'MS' means methyl methacrylate/styrene copolymer resin particles, and cerium oxide means porous cerium oxide particles. &lt;Examples 1 to 4&gt; (a) Preparation of back side polarizing plate On one side of the polarizing film obtained in Production Example 1, a polypropylene resin film (thickness: 50 μηι) was electrically applied to the bonding surface thereof. After the halo treatment, the bonding is carried out by means of an adhesive. Next, on the reverse side of the polarizing film, an optical compensation film formed by biaxially extending a norbornene-based resin (thickness: 6 〇 μιη, in-plane retardation: 63 nm) , thickness direction phase difference: 225 11〇〇 After the coring treatment is applied to the bonding surface, the bonding is performed by an adhesive to obtain a back side polarizing plate. Further, the polypropylene resin film and the double film are An optical compensation film formed by stretching a norbornene-based resin, such that the slow axis is orthogonal to the extension axis of the polarizing film, and then biaxially extending norbornene on the back side polarizing plate The optical compensation film surface was provided with a layer of a binder (2 〇 ^ 111 thick). (b) Preparation of front side polarizing plate For each base film of the anti-glare protective films (A) to (D) obtained in Production Example 2. After the surface (the side opposite to the side on which the cured resin film is provided) is subjected to corona treatment, it is manufactured. The single side of the polarizing film obtained in 1 is respectively attached to the corona-treated surface by means of an adhesive, and the 8-ethyl cellulose film having a thickness of 8 Å is applied to the bonding surface on the reverse side of the polarizing film. After the corona treatment, the front side polarizing plate was obtained by bonding with an adhesive. Further, a layer of a binder (thickness 20 μm) was provided on the surface of the cellulose film having a thickness of 8 pm. Manufacture of a liquid crystal panel and a liquid crystal display device 154840.doc •42·201202761 A liquid crystal cell peeling polarizing plate of a commercially available liquid crystal display ("LC-42GX1W" manufactured by Sharp Corporation) of a liquid crystal display device having a vertical alignment mode. The back side polarizing plate (E) is attached to the back surface (backlight side) of the liquid crystal cell. The front side polarizing plate is bonded to the front surface (viewing side) of the liquid crystal cell, and the absorption axis of the polarizing plate is adhered to the liquid crystal. The polarizing plate of the television has the same absorption axis direction, and a liquid crystal panel is produced. At this time, the front side polarizing plate is bonded to the surface of the triacetyl cellulose film having a thickness of 80 μm on the side opposite to the anti-glare protective film. Agent The back side polarizing plate is bonded to the liquid crystal cell via the adhesive layer formed on the optical compensation film, and then the liquid crystal panel is backed by a backlight/light diffusing plate/strip ("BEF" ”/Brightness enhancement sheet (“DBEF” manufactured by Sanken Co., Ltd.)/liquid crystal panel is assembled to produce a liquid crystal display device. The liquid crystal display device is visually evaluated for stains (interference spots) when viewed from the front and oblique directions. The evaluation results are shown in Table 2. <Comparative Example 1> In one side of the polarized iridium obtained in Production Example 1, polyparaphenylene was used.

Fit together to obtain a polarizing plate. Furthermore, the optical compensation film formed by the double is coupled with its late phase axis

154840.doc After the treatment at home, the biaxially-stretched norbornene-based resin gold knot/all stop 介A~y丄h: the optical compensation film of the orthogonal axis of the extension axis-43·201202761 Layer of the agent (25 (four) thick). Next, a polarizing plate prepared here is used to form a polarizing plate disposed on the back surface and the front surface of the liquid crystal cell, and the adhesive layer formed on the optical compensation film surface is bonded to the liquid crystal cell, and The liquid crystal display device is assembled in the same manner. Here, the polarizing plate disposed on the back surface of the liquid crystal cell is referred to as "light plate (F). The liquid crystal display is placed in the same manner as in Example 。. The evaluation results are shown in Table 2 〇 134840.doc -44 - 201202761 [(Νί degree of color spot A fr seven back side polarizer protective film (X. eu 0. Ph PL, PET type gg @ @ g 1 protective film haze of front side polarizer 13% 24% 44% 19% CM substrate TAC TAC TAC PET PET type gg Example 1 Example 2 Example 3 Example 4 Comparative Example 1 154840.doc -45- 201202761 Further, in Table 2, TAC represents triacetyl cellulose, and PET represents poly Ethylene terephthalate, PP means a polypropylene resin. As shown in Table 2, it is understood that the liquid crystal panel and the liquid crystal display device using the polarizing plate group of the present invention are used in the front side polarizing plate. In the case of the protective film formed of cerium cellulose (Examples 1 to 3), even in the case where a protective film formed of polyethylene terephthalate (Example 4) was used, it was able to The color spots (interference spots) when viewed in an oblique direction are sufficiently reduced. In addition, since a protective film made of a polypropylene-based resin is used for the back side polarizing plate, mechanical strength can be maintained and thinning can be achieved. [FIG. 1] FIG. 1 shows the basic structure of the liquid crystal display device of the present invention. A schematic cross-sectional view of an example of a layer configuration. [Description of main component symbols] 10 Backlight 20 First polarizing plate 21 First polarizing film 23 Optical compensation film 24 Polypropylene resin film 30 Second polarizing plate 31 Second polarizing film 33 Protection Film or optical compensation film 34 Anti-glare protective film 40 Liquid crystal cell 50 Light diffusing plate 154840.doc -46· 201202761 60 100 Liquid crystal panel liquid crystal display device 154840.doc -47

Claims (1)

201202761 VII. Patent application scope: 1_ A polarizing plate group which is a polarizing plate group for a liquid crystal panel including a second polarizing plate and a second polarizing plate, and the first polarizing plate has the first one formed of a polyvinyl alcohol resin. a polarizing film and a polypropylene resin film of a single-layer layer of the first polarizing film, wherein the second polarizing plate has a second polarizing film made of a polyvinyl alcohol-based resin and a single polarizing film The anti-glare protective film of the area layer has a haze value of 3% to 45 Å/〇. 2. The polarizing plate set according to claim 1, wherein the second polarizing plate further comprises an optical compensation film laminated on a surface of the first polarizing film opposite to a surface on which the polypropylene resin film is laminated. 3. The polarizing plate group according to item 1, wherein the antiglare protective film is a polyester resin film. 4. The polarizing plate set according to any one of claims 1 to 3, wherein the second polarizing plate further has a layer on a surface opposite to a surface on which the anti-glare protective film is laminated on the second polarizing film. Optical compensation film. A liquid crystal panel comprising the polarizing plate group according to any one of claims 4 to 4, wherein the second polarizing plate, the liquid crystal cell, and the second polarizing plate are sequentially disposed, wherein the first polarizing plate is The surface of the second polarizing film opposite to the surface on which the polypropylene resin film is laminated is disposed to face the liquid crystal cell, and 154E40.doc 201202761 the second polarizing plate is laminated with the second polarizing film. The surface on the opposite side to the surface of the anti-glare protective film is disposed to face the liquid crystal cell. 6. A liquid crystal display device comprising a backlight, a light diffusing plate, and a liquid crystal panel according to the item 5, wherein the liquid crystal panel is disposed such that the polypropylene resin film faces the light diffusing plate. 154840.doc