WO2019131666A1 - 偏光板用積層体、偏光板、偏光板用積層体フィルムロール、偏光板用積層体の製造方法及び偏光板の製造方法 - Google Patents

偏光板用積層体、偏光板、偏光板用積層体フィルムロール、偏光板用積層体の製造方法及び偏光板の製造方法 Download PDF

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Publication number
WO2019131666A1
WO2019131666A1 PCT/JP2018/047638 JP2018047638W WO2019131666A1 WO 2019131666 A1 WO2019131666 A1 WO 2019131666A1 JP 2018047638 W JP2018047638 W JP 2018047638W WO 2019131666 A1 WO2019131666 A1 WO 2019131666A1
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WIPO (PCT)
Prior art keywords
laminate
polarizing plate
resin film
resin
film
Prior art date
Application number
PCT/JP2018/047638
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English (en)
French (fr)
Japanese (ja)
Inventor
啓 眞島
貴道 猪股
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日本ゼオン株式会社
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Publication date
Application filed by 日本ゼオン株式会社 filed Critical 日本ゼオン株式会社
Priority to KR1020207017034A priority Critical patent/KR20200101915A/ko
Priority to JP2019562043A priority patent/JP7226334B2/ja
Priority to CN201880081442.XA priority patent/CN111492276B/zh
Publication of WO2019131666A1 publication Critical patent/WO2019131666A1/ja

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • B29C55/04—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H18/00—Winding webs
    • B65H18/28—Wound package of webs
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D123/00—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D153/00—Coating compositions based on block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers
    • C09D153/02—Vinyl aromatic monomers and conjugated dienes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/14—Protective coatings, e.g. hard coatings
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/17—Nature of material
    • B65H2701/172—Composite material

Definitions

  • the present invention relates to a laminate for polarizing plate, a polarizing plate, a laminate film roll for polarizing plate, a method for producing a laminate for polarizing plate, and a method for producing a polarizing plate.
  • a polarizing plate provided with a polarizer and a protective film for protecting the polarizer is generally used.
  • thinner polarizing plates are also required.
  • the polarizer may shrink in the use environment of the display device, warpage due to such shrinkage may be a problem in a thin display device having a large area. Therefore, by employing a thin polarizer having a thickness of 10 ⁇ m or less, in addition to the reduction of the thickness of the display device due to the reduction of the thickness of the polarizer itself, the reduction of the occurrence of the warpage as described above can be expected.
  • a polyvinyl alcohol-based resin layer is formed by applying an aqueous solution containing a polyvinyl alcohol-based resin to a resin film composed of an amorphous ester-based thermoplastic resin to form a laminate, and the laminate A method is proposed in which the dichroic substance is oriented to form a colored laminate, and the colored laminate is stretched to obtain an optical film.
  • Patent No. 4691205 Corresponding Gazette: US Patent No. 8314987
  • phase difference may generate
  • a protective film for protecting the polarizing plate may be separately prepared and may be attached to the polarizing plate.
  • a resin film can be used as a protective film, and a laminate for a polarizing plate which can be efficiently produced even if the thickness is thin, a method for producing the same, a polarizing plate using the laminate and It aims at providing the manufacturing method and the layered product film roll for polarizing plates using the above-mentioned layered product.
  • a polyvinyl alcohol resin film comprising a cycloolefin resin containing a predetermined cycloolefin polymer and a polyvinyl resin laminated on at least one surface of the resin film.
  • a resin film comprising a cycloolefin resin, A laminate for a polarizing plate, having a polyvinyl alcohol layer laminated by coating on at least one surface of the resin film,
  • the cycloolefin resin contains a cycloolefin polymer, A polymer block [A] in which the cycloolefin polymer is composed mainly of a repeating unit [I] derived from an aromatic vinyl compound, Polymer block [B] mainly composed of a repeating unit [I] derived from an aromatic vinyl compound and a repeating unit [II] derived from a chain conjugated diene compound, or a repeating unit [II] derived from a chain conjugated diene compound Polymer block [C] which is a main component,
  • the laminated body for polarizing plates which is the block copolymer hydride which hydrogenated the block copolymer [D] which consists of these.
  • the thickness T of the polyvinyl alcohol layer is 45 ⁇ m or less, and
  • the retardation Re2 in the in-plane direction of the stretched product of the resin film is 0 nm or more and 20 nm or less, and the retardation Re2 is 6.0 times the temperature condition of 50 ° C. to 120 ° C.
  • the laminated body for polarizing plates as described in [1] which is a phase difference which the said extending
  • the cycloolefin resin contains a cycloolefin polymer, A polymer block [A] in which the cycloolefin polymer is composed mainly of a repeating unit [I] derived from an aromatic vinyl compound, Polymer block [B] mainly composed of a repeating unit [I] derived from an aromatic vinyl compound and a repeating unit [II] derived from a chain conjugated diene compound, or a repeating unit [II] derived from a chain conjugated diene compound Polymer block [C] which is a main component,
  • the manufacturing method of the laminated body for polarizing plates which is the block copolymer hydride which hydrogenated the block copolymer [D] which consists of these.
  • a resin film can be used as a protective film, and a laminate for a polarizing plate which can be efficiently produced even if the thickness is thin, a method for producing the same, a polarizing plate using the laminate, The manufacturing method and the laminate film roll for polarizing plates can be provided.
  • FIG. 1 is a cross-sectional view schematically showing a laminate for a polarizing plate according to Embodiment 1 of the present invention.
  • FIG. 2 is the figure which showed typically an example of the manufacturing apparatus of the laminated body for polarizing plates which concerns on Embodiment 1.
  • FIG. 3 is sectional drawing which showed typically the laminated body film roll for polarizing plates manufactured using the laminated body for polarizing plates which concerns on Embodiment 1 of this invention.
  • FIG. 4 is the figure which showed typically an example of the manufacturing apparatus which manufactures a polarizing plate using the laminated body for polarizing plates which concerns on Embodiment 1.
  • FIG. 5 is a cross-sectional view schematically showing a polarizing plate manufactured using the laminate for a polarizing plate according to Embodiment 1 of the present invention.
  • FIG. 6 is a cross-sectional view schematically showing a polarizing plate according to Embodiment 2 of the present invention.
  • a "long film” refers to a film having a length of 5 times or more, preferably 10 times or more of the width of the film, and specifically, It has a length that can be rolled up and stored or transported.
  • the upper limit of the ratio of the length to the width of the film is not particularly limited, and may be, for example, 100,000 times or less.
  • the Nz coefficient of the film is a value represented by [(nx-nz) / (nx-ny)] and can also be represented as [(Rth / Re) +0.5].
  • nx is the refractive index in the slow axis direction in the plane of the film (maximum refractive index in the plane)
  • ny is the refractive index in the in-plane direction perpendicular to the slow axis in the plane of the film
  • nz is the refractive index in the thickness direction of the film
  • d is the thickness (nm) of the film.
  • the measurement wavelength is 550 nm, which is a typical wavelength in the visible light range.
  • Embodiment 1 A laminate for a polarizing plate and a method for producing the same, a laminate film roll for a polarizing plate, a polarizing plate and a method for producing the same]
  • a laminate for a polarizing plate hereinafter, also simply referred to as a “laminate” of Embodiment 1 which is an embodiment of the present invention, a method for producing the same, a laminate film roll for a polarizing plate using the laminate, and A polarizing plate using the laminate and a method of manufacturing the same will be described with reference to FIGS. 1 to 5.
  • the laminate for a polarizing plate of the present invention has a resin film made of cycloolefin resin and a polyvinyl alcohol layer laminated on at least one surface of the resin film.
  • the polyvinyl alcohol layer is a layer (coating layer) laminated by coating.
  • FIG. 1 is an example of sectional drawing which shows typically the laminated body 10 of Embodiment 1 which concerns on this invention.
  • the laminate 10 of the present embodiment has a resin film 12 and a polyvinyl alcohol layer 11 provided on one surface (upper surface in the drawing) of the resin film.
  • the laminate 10 of the present invention is a material for producing a polarizer (polarizing plate).
  • the polyvinyl alcohol layer is a layer made of polyvinyl alcohol resin.
  • PVA polyvinyl alcohol
  • the PVA resin (polyvinyl alcohol resin) for forming the PVA layer is not necessarily limited, but from the viewpoint of availability etc., one produced by saponifying polyvinyl acetate obtained by polymerizing vinyl acetate It is preferred to use.
  • the PVA contained in the PVA resin preferably has a degree of polymerization in the range of 500 to 8000, and a degree of saponification of 90% by mol or more from the viewpoint that the stretchability and the polarization performance of the obtained polarizer are excellent. preferable.
  • the degree of polymerization is an average degree of polymerization measured in accordance with the description of JIS K 6726-1994
  • the degree of saponification is a value measured in accordance with the description of JIS K 6726-1994.
  • a more preferable range of the polymerization degree is 1000 to 6000, and more preferably 1500 to 4000.
  • a more preferable range of the degree of saponification is 95 mol% or more, more preferably 99 mol% or more.
  • the PVA may be a copolymer of vinyl acetate and another monomer copolymerizable, or a graft polymer.
  • the PVA resin is a plasticizer such as polyhydric alcohol such as glycerin in an amount of 0.01 to 30% by weight with respect to PVA in order to improve mechanical physical properties and process passability during secondary processing. It is preferable to contain 0.01 to 1% by weight of a surfactant such as an anionic surfactant or a nonionic surfactant in order to improve handleability and film appearance. Is preferred.
  • the PVA resin is, if necessary, an antioxidant, an ultraviolet light absorber, a lubricant, a pH adjuster, inorganic fine particles, a colorant, an antiseptic, a mildew proofing agent, a polymer compound other than the above components, moisture, etc. It may further contain other ingredients.
  • the PVA resin can contain one or more of these other components.
  • the thickness T of the PVA layer is preferably 45 ⁇ m or less, more preferably 35 ⁇ m or less, still more preferably 25 ⁇ m or less, preferably 5 ⁇ m or more, more preferably 10 ⁇ m or more, still more preferably 15 ⁇ m or more.
  • the thickness of the PVA layer is not more than the upper limit of the above range, the contraction force of the polarizing plate can be effectively reduced, and by being not less than the lower limit of the above range, a polarizing plate having sufficiently high polarization performance can be obtained. You can get it.
  • the retardation Re1 in the in-plane direction of the PVA layer is preferably 50 nm or less, more preferably 40 nm or less, still more preferably 30 nm or less, preferably 0 nm or more, more preferably 3 nm or more.
  • the retardation Re1 in the in-plane direction of the PVA layer is not more than the upper limit value of the above range, the laminate can be stretched at a sufficient magnification, and a polarizing plate with high polarization performance can be obtained.
  • the resin film is made of a cycloolefin resin.
  • the cycloolefin resin is a resin containing a cycloolefin polymer.
  • the cycloolefin resin is preferably a resin having flexibility capable of drawing at a high draw ratio (for example, 6.0 times) at a low temperature (for example, 50 to 120 ° C.).
  • the cycloolefin polymer contained in the cycloolefin resin comprises a polymer block [A] mainly composed of a repeating unit [I] derived from an aromatic vinyl compound, and a repeating unit [I] derived from an aromatic vinyl compound Polymer block [B] mainly composed of repeating unit [II] derived from chain conjugated diene compound, or polymer block [C] mainly composed of repeating unit [II] derived from chain conjugated diene compound
  • the block copolymer [D] consisting of the above is a hydrogenated block copolymer.
  • a block copolymer hydride WO 2000/32646, WO 2001/081957, JP 2002-105151, JP 2006-195242, JP 2011-13378, WO 2015/002020 And the like.
  • the cycloolefin resin forming the resin film preferably contains a plasticizer and / or a softener (either one or both of the plasticizer and the softener).
  • a plasticizer and / or a softener it is possible to reduce the retardation generated in the resin film when the laminate is stretched to obtain a polarizing plate.
  • plasticizer and the softener those which can be uniformly dissolved or dispersed in the cycloolefin resin forming the resin film may be used.
  • specific examples of the plasticizer and the softener include an ester-based plasticizer composed of a polyhydric alcohol and a monovalent carboxylic acid (hereinafter referred to as "polyhydric alcohol ester-based plasticizer"), and a polyvalent carboxylic acid and a monovalent Ester-based plasticizers such as ester-based plasticizers (hereinafter referred to as "polyvalent carboxylic acid ester-based plasticizers") consisting of alcohols, and phosphoric acid ester-based plasticizers, carbohydrate ester-based plasticizers, and other polymer softeners Can be mentioned.
  • Ethylene glycol glycerol, and trimethylol propane are preferable.
  • polyhydric alcohol ester-based plasticizers examples include ethylene glycol ester-based plasticizers, glycerin ester-based plasticizers, and other polyhydric alcohol ester-based plasticizers.
  • polyvalent carboxylic acid ester-based plasticizers examples include dicarboxylic acid ester-based plasticizers and other polyvalent carboxylic acid ester-based plasticizers.
  • phosphoric acid ester plasticizers include phosphoric acid alkyl esters such as triacetyl phosphate and tributyl phosphate; phosphoric acid cycloalkyl esters such as tricyclophenyl phosphate and cyclohexyl phosphate; triphenyl phosphate and tricresyl phosphate And phosphoric acid aryl esters.
  • carbohydrate ester plasticizers include glucose pentaacetate, glucose pentapropionate, glucose pentabutyrate, sucrose octaacetate, sucrose octabenzoate and the like, among which sucrose octaacetate is more preferred. preferable.
  • polymer softener examples include aliphatic hydrocarbon polymers, alicyclic hydrocarbon polymers, polyethyl acrylate, polymethyl methacrylate, methyl methacrylate and 2-hydroxyethyl methacrylate.
  • Acrylic polymers such as copolymers, copolymers of methyl methacrylate, methyl acrylate and 2-hydroxyethyl methacrylate; vinyl polymers such as polyvinyl isobutyl ether, poly N-vinyl pyrrolidone; polystyrene, poly 4 -Styrene polymers such as hydroxystyrene; polyesters such as polybutylene succinate, polyethylene terephthalate and polyethylene naphthalate; polyethers such as polyethylene oxide and polypropylene oxide; polyamides, polyurethanes, polyureas and the like.
  • aliphatic hydrocarbon polymers include low molecular weight polymers such as polyisobutylene, polybutene, poly-4-methylpentene, poly-1-octene, ethylene / ⁇ -olefin copolymer, and their hydrides; polyisoprene And low molecular weight products such as polyisoprene-butadiene copolymer and the hydrides thereof.
  • the aliphatic hydrocarbon-based polymer preferably has a number average molecular weight of 300 to 5,000, from the viewpoint of easy dissolution or dispersion in the cycloolefin resin uniformly.
  • polymer softeners may be homopolymers consisting of one type of repeating unit or copolymers having a plurality of repeating structures. In addition, two or more of the above polymers may be used in combination.
  • the plasticizer and / or the softener at least one selected from ester-based plasticizers and aliphatic hydrocarbon polymers is preferred because they are particularly excellent in compatibility with the resin forming the resin film. preferable.
  • the proportion of the plasticizer and / or softener (hereinafter also referred to as “plasticizer etc.”) in the resin film is preferably 0.2 parts by weight or more, more preferably 100 parts by weight of the cycloolefin resin forming the resin film. Is 0.5 parts by weight or more, still more preferably 1.0 part by weight or more, and preferably 50 parts by weight or less, more preferably 40 parts by weight or less.
  • the resin film preferably contains an organic metal compound.
  • an organic metal compound By containing the organic metal compound, it is possible to more effectively suppress the occurrence of peeling of the resin film when the laminate is stretched at a high stretching ratio (for example, wet stretching at a stretching ratio of 6.0).
  • the organometallic compound is a compound including at least one of a chemical bond of metal and carbon and a chemical bond of metal and oxygen, and is a metal compound having an organic group.
  • the organic metal compound include organic silicon compounds, organic titanium compounds, organic aluminum compounds and organic zirconium compounds.
  • organosilicon compounds, organotitanium compounds and organozirconium compounds are preferable, and organosilicon compounds are more preferable because they are excellent in reactivity with polyvinyl alcohol.
  • the organometallic compounds may be used alone or in combination of two or more.
  • R 1 and R 2 each independently represent a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 10 carbon atoms, an epoxy group, an amino group, a thiol group, an isocyanate group, or carbon
  • R 1 examples include an epoxy group, an amino group, a thiol group, an isocyanate group, a vinyl group, an aryl group, an acrylic group, an alkyl group having 1 to 8 carbon atoms, and —CH 2 OC n H 2n + 1 (n represents an integer of 1 to 4) and the like.
  • R 2 include a hydrogen atom, a vinyl group, an aryl group, an acryl group, an alkyl group having 1 to 8 carbon atoms, -CH 2 OC n H 2n + 1 (n is 1 Represents an integer of to 4.) and the like.
  • organosilicon compounds include epoxy-based organosilicon compounds such as 3-glycidoxypropyltrimethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, 3-aminopropyltrimethoxysilane, N- Amino organosilicon compounds such as 2- (aminoethyl) -3-aminopropyltrimethoxysilane, isocyanurate organosilicon compounds such as tris- (trimethoxysilylpropyl) isocyanurate, 3-mercaptopropyltrimethoxysilane And isocyanate based organosilicon compounds such as mercapto based organosilicon compounds and 3-isocyanatopropyltriethoxysilane.
  • epoxy-based organosilicon compounds such as 3-glycidoxypropyltrimethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltrime
  • organic titanium compounds examples include titanium alkoxides such as tetraisopropyl titanate, titanium chelates such as titanium acetylacetonate, and titanium acylates such as titanium isostearate.
  • organic zirconium compounds include zirconium alkoxides such as normal propyl zirconate, zirconium chelates such as zirconium tetraacetylacetonate, and zirconium acylates such as zirconium stearate.
  • organoaluminum compound examples include aluminum alkoxides such as aluminum secondary butoxide, and aluminum chelates such as aluminum trisacetylacetonate.
  • the ratio of the organic metal compound in the resin film is preferably 0.05 parts by weight or more, more preferably 0.01 parts by weight or more, and still more preferably 0 parts by weight with respect to 100 parts by weight of the cycloolefin resin forming the resin film. It is not less than .03 parts by weight, preferably not more than 1.0 parts by weight, and more preferably not more than 0.5 parts by weight.
  • the resin film may contain optional components in addition to the resin, the plasticizer, the organic metal compound and the like.
  • optional components include stabilizers such as antioxidants, ultraviolet light absorbers, light stabilizers, etc .; resin modifiers such as lubricants; colorants such as dyes and pigments; and antistatic agents. These compounding agents can be used individually by 1 type or in combination of 2 or more types, and the compounding quantity is selected suitably.
  • the resin film is a film-like composition (hereinafter also referred to as “resin composition”) containing components for forming the resin film (cycloolefin resin and components added as necessary) by any forming method It can manufacture by shape
  • resin composition a film-like composition
  • the thickness of a resin film 1 micrometer or more is preferable, as for the thickness of a resin film, 3 micrometers or more are more preferable, 50 micrometers or less are preferable, and 20 micrometers or less are more preferable.
  • the thickness of the resin film is not less than the lower limit of the above range, a laminate with a good bonding surface shape can be obtained, and by being not more than the upper limit of the above range, the laminate is stretched to obtain a polarizing plate The phase difference generated in the resin film can be reduced when
  • the shape and dimensions of the resin film can be appropriately adjusted according to the desired application. It is preferable that a resin film is a long film from the efficiency of manufacture.
  • the in-plane retardation Re2 of the stretched product of the resin film is preferably 0 nm or more and 20 nm or less. More preferably, Re2 is 0 nm or more, more preferably 10 nm or less, and particularly preferably 5 nm or less.
  • Re2 is equal to or less than the upper limit value, when the laminate 10 is stretched to form a polarizing plate, it is possible to reduce the phase difference developed in the resin film.
  • Re2 is not a retardation of the resin film itself in the laminate, but a retardation generated in a stretched product of the resin film after the laminate is subjected to a specific stretching treatment.
  • the stretching temperature for obtaining such a stretched product may be any temperature within the range of 50 ° C to 120 ° C. Therefore, several operating conditions for stretching to obtain a stretched product are conceivable.
  • the stretched product exhibits a phase difference of 0 nm or more and 20 nm or less by any one of the plurality of operation conditions, the laminate satisfies the above requirements.
  • the stretched material exhibits a phase difference of 0 nm or more and 20 nm or less according to all of the plurality of possible operation conditions.
  • the method for producing a laminate according to the present embodiment includes a first step of coating a PVA resin on at least one surface of a resin film made of a cycloolefin resin to form a PVA layer, and a first step. And drying the resulting PVA layer in this order.
  • the cycloolefin polymer contained in the resin film used for producing the laminate comprises a polymer block [A] containing as a main component the repeating unit [I] derived from the above-mentioned aromatic vinyl compound, and a repeating unit derived from the aromatic vinyl compound
  • FIG. 2 is the schematic which showed typically an example of the manufacturing apparatus 200 used in the manufacturing method of the laminated body which concerns on this embodiment.
  • the manufacturing apparatus 200 includes a delivery device 201, a coating device 202, a winding device 203, and a drying device 205.
  • a PVA resin is coated on the surface of the resin film 12 delivered from the delivery device 201 in the coating device 202 to form the PVA layer 11 (first step), and then dried in the drying device 205.
  • the laminated body 10 is obtained by passing through the process (2nd process).
  • the manufactured laminate 10 can be taken up by a take-up device 203, formed into a roll, and subjected to a further process. Each step will be described below.
  • the first step is a step of coating the PVA resin on at least one surface of the resin film 12 made of cycloolefin resin to form the PVA layer 11.
  • the method (coating method) for coating the PVA resin on the resin film 12 is not particularly limited, but is preferably one or more methods selected from, for example, solution coating, emulsion coating, or melt extrusion coating, and high speed coating is Solution coating is more preferred because a PVA layer of possible uniform thickness is obtained.
  • the PVA PVA or PVA film
  • the PVA composition is coated on the resin film 11 . That is, the phrase "coating a resin” includes both the case of coating only a resin and the case of coating a resin composition containing a resin and other components.
  • the second step is a step of drying the PVA layer formed in the first step.
  • the PVA layer is preferably dried in a dryer at a temperature of 50 ° C. to 120 ° C. for 0.5 minutes to 10 minutes.
  • the drying temperature of the PVA layer is more preferably 60 ° C. or more, and more preferably 100 ° C. or less.
  • the manufacturing method of the laminated body of this invention may include the process of carrying out the easy adhesion process of the surface in which the PVA layer of a resin film is formed before a 1st process.
  • Examples of the method of easy adhesion treatment in the step include corona treatment, saponification treatment, primer treatment, anchor coating treatment and the like.
  • the laminate 10 of the present invention is a material for producing a polarizing plate.
  • the laminate is subjected to predetermined treatments such as stretching treatment and dyeing treatment to be used as a polarizing plate.
  • the laminate wound by the winding device 203 shown in FIG. 2 may be used as it is, or the resin film of the laminate 10 wound by the winding device 203 A separator film may be laminated on 12 and wound into a roll shape to be used as a laminate film roll.
  • a laminate film roll and a polarizing plate of the present embodiment using the laminate 10 of the present embodiment will be described in order.
  • FIG. 3 is sectional drawing which showed typically the laminated body film roll for polarizing plates using the laminated body which concerns on this embodiment.
  • the laminate film roll 15 for a polarizing plate of the present embodiment is formed on the surface of the laminate 10 and the resin film 12 of the laminate 10 opposite to the PVA layer 11 (lower side in the figure). It is a film roll which has the laminated
  • the laminate film roll 15 of the present embodiment includes a laminate 10 having a resin film 12 and a PVA layer 11 laminated on one surface of the resin film 12, and a PVA layer 11 of the resin film 12 of the laminate 10. And a separator film 13 laminated on the opposite surface.
  • the separator film 13 is not particularly limited as long as it is a film made of a material that can be peeled from the resin film 12, and, for example, cycloolefin resin, acrylic resin, polyethylene terephthalate resin, polyethylene resin, polypropylene resin, and triacetyl cellulose resin
  • the film which consists of 1 or more types of resin chosen from can be used.
  • the polarizing plate 100 of the present invention is obtained by uniaxially stretching the laminate 10 of the present embodiment.
  • FIG. 4: is the figure which showed typically an example of the manufacturing apparatus which manufactures a polarizing plate using the laminated body for polarizing plates which concerns on this embodiment.
  • the method for producing a polarizing plate of the present invention includes a third step of dyeing the laminate with a dichroic dye, and a fourth step of uniaxially stretching the laminate. Moreover, after passing through the third step and / or the fourth step, the method for producing a polarizing plate of the present invention comprises bonding a protective film to the surface of the PVA layer of the laminate opposite to the resin film. May be included. In the present embodiment, the polarizing plate is manufactured by a manufacturing method not including the fifth step.
  • the manufacturing apparatus 300 for manufacturing a polarizing plate includes delivery devices 301 and 307, processing devices 302 to 305, drying devices 306 and 309, a bonding device 308, and a winding device 310.
  • the laminate 10 delivered from the delivery device 301 is conveyed to the processing devices 302 to 305 to dye the PVA layer 11 of the laminate 10 (third step), the laminate A stretching process (fourth step) of uniaxially stretching and a predetermined process are performed.
  • the treatment drying step
  • the polarizing plate 100 is obtained.
  • the third step is a step of dyeing the PVA layer 11 of the laminate 10.
  • the substance for dyeing the PVA layer in the third step includes a dichroic substance, and the dichroic substance includes iodine, an organic dye and the like.
  • a staining method using these dichroic substances is optional.
  • dyeing may be performed by immersing the PVA layer in a dyeing solution containing a dichroic substance.
  • the staining solution may contain an iodide such as potassium iodide from the viewpoint of enhancing the staining efficiency.
  • the dichroic substance is not particularly limited, but when the polarizing plate is used in a vehicle-mounted display, an organic dye is preferable as the dichroic substance.
  • the fourth step is a step of uniaxially stretching the laminate.
  • the method of stretching the laminate is not particularly limited, but wet stretching is preferred.
  • the fourth step may be performed before the third step, after the third step, or simultaneously with the third step.
  • the fourth step may be performed once or plural times (two or more times). When the fourth step is performed a plurality of times, it may be divided into two or more of the times, or may be performed a plurality of times at one time.
  • the draw ratio of the laminate is preferably 5.0 or more, more preferably 5.5 or more, preferably 7.0 or less, more preferably 6.5 or less.
  • the draw ratio of the laminate is not more than the upper limit value of the above range, the expression of retardation of the resin film is lowered even after passing through the manufacturing process of the polarizing plate including the drawing treatment, and the generation of the breakage of the polarizing plate is prevented.
  • the stretching ratio is at least the lower limit of the above range, a polarizing plate having sufficient polarization performance can be obtained.
  • the laminate is stretched twice or more, it is preferable that the total stretch ratio represented by the product of the stretch ratio of each time be in the above range.
  • the stretching temperature of the laminate is not particularly limited, but is preferably 30 ° C. or more, more preferably 40 ° C. or more, particularly preferably 50 ° C. or more, preferably 140 ° C. or less, more preferably 90 ° C. or less, in particular Preferably it is 70 degrees C or less.
  • the stretching temperature is at least the lower limit value of the range, the stretching can be smoothly performed, and when the stretching temperature is at the upper limit value of the range or less, effective orientation can be performed by the stretching.
  • the range of the stretching temperature is preferably either dry stretching or wet stretching, but is particularly preferred in the case of wet stretching.
  • Stretching of the laminate is either longitudinal stretching in which the film is stretched in the longitudinal direction, transverse stretching in which the film is stretched in the width direction, or oblique stretching in which the film is stretched in an oblique direction which is neither parallel nor perpendicular to the film width direction.
  • the stretching treatment of the laminate is preferably free end uniaxial stretching, and more preferably free end uniaxial stretching in the longitudinal direction.
  • the drying step is a step of drying the laminate which has undergone the processing steps such as the third step and the fourth step.
  • the laminate after the treatment step is preferably dried in a dryer at a temperature of 50 ° C. to 100 ° C. for 0.5 minutes to 10 minutes.
  • the drying temperature of the laminate is more preferably 60 ° C. or more, and more preferably 90 ° C. or less.
  • the drying time of the laminate is more preferably 1 minute or more, and more preferably 5 minutes or less.
  • the polarizing plate of the present embodiment is a laminate including a resin film consisting of a PVA layer and a cycloolefin resin Since it manufactures using these, generation
  • a polarizing plate is obtained by the manufacturing method of the polarizing plate of the above-mentioned this embodiment.
  • the polarizing plate of the present embodiment is a polarizing plate obtained by uniaxially stretching the laminate of the present embodiment.
  • FIG. 5 is a cross-sectional view schematically showing a polarizing plate manufactured using the laminate according to the present embodiment. As shown in FIG. 5, in the polarizing plate 100, the resin film 112 is laminated on one surface (the lower surface in the drawing) of the PVA layer 111.
  • the thickness is equal to or less than the upper limit, the thickness of the polarizing plate can be reduced, and when the thickness is equal to or more than the lower limit, a polarizing plate having sufficiently high polarization performance can be obtained.
  • the retardation in the in-plane direction of the resin film in the polarizing plate is preferably 20 nm or less, more preferably 15 nm or less, still more preferably 10 nm or less, and preferably 0 nm or more.
  • the retardation in the in-plane direction of the resin film in the polarizing plate is within the above range, it is possible to suppress the black color shift when the polarizing plate is mounted on a liquid crystal display device.
  • the polarizing plate manufactured using the laminated body for polarizing plates of this invention can become a material of a liquid crystal display device.
  • the liquid crystal display device comprises a light source, a light source side polarizing plate, a liquid crystal cell and a viewing side polarizing plate in this order, but the polarizing plate obtained by the present invention is either the light source side polarizing plate or the viewing side polarizing plate You may use.
  • the liquid crystal display device can be manufactured by laminating the polarizing plate of the present invention as a light source side polarizing plate and / or a viewing side polarizing plate on a liquid crystal panel.
  • the polarizing plate manufactured using the laminated body for polarizing plates of this invention can become materials, such as an organic electroluminescence display and an inorganic electroluminescence display.
  • the organic EL display device comprises, in order from the light emitting side, a substrate, a transparent electrode, a light emitting layer and a metal electrode layer, but the polarizing plate obtained by the manufacturing method of the present invention is disposed on the light emitting side of the substrate. Ru.
  • the EL display device has two substrates, a light emitting layer positioned between them, and a polarizing plate disposed outside one of the two substrates.
  • the display device can be manufactured by laminating the polarizing plate of the present invention on an organic EL panel or an inorganic EL panel.
  • the polarizing plate is manufactured by stretching a laminate having a resin film and a PVA layer laminated on the resin film, so even when the laminate is stretched at a low temperature under high magnification, PVA It is possible to suppress the occurrence of melt cutting of the layer, and to suppress the expression of retardation in the resin film after stretching.
  • the resin film can be used as it is as a protective film on one side of the PVA layer without peeling off, and the material to be wasted can be reduced. It is possible to provide a manufacturing method of a polarizing plate which can be used efficiently and which can be efficiently manufactured even if the thickness is thin.
  • a laminate in which the PVA layer 11 is directly laminated on the resin film 12 is used, and no other material intervenes between the resin film 12 and the PVA layer 11, so that a fracture suppressing effect can be obtained. It is excellent and can prevent environmental pollution by other substances in a production environment and contamination (contamination) of the product.
  • the polarizing plate 120 according to Embodiment 2 and the method for manufacturing the same will be described with reference to FIGS. 4 and 6.
  • the polarizing plate 120 according to the present embodiment is manufactured using the polarizing plate 100 according to the first embodiment.
  • the same components and aspects as those of Embodiment 1 are denoted by the same reference numerals, and duplicate descriptions will be omitted.
  • FIG. 6 is a cross-sectional view schematically showing a polarizing plate 120 according to Embodiment 2 of the present invention.
  • the resin film 112 is laminated on one surface (the lower surface in the drawing) of the PVA layer 111, and the protective film is on the other surface (the upper surface in the drawing) 115 are stacked.
  • 114 is an adhesive.
  • the fifth step is to bond a protective film to the surface of the PVA layer of the laminate opposite to the resin film. Including the steps. Details will be described below.
  • the polarizing plate 120 of the present embodiment is manufactured using the apparatus shown in FIG. In the manufacturing method of the polarizing plate 120 of the present embodiment, the drying process is performed after the dyeing process (third step) for dyeing the PVA layer of the laminate 10 and the stretching process (fourth process) for uniaxially stretching the laminate.
  • the polarizing plate 100 obtained by drying at 306 is used.
  • the polarizing plate 120 conveys the polarizing plate 100 obtained through the dyeing process (third process) and the stretching process (fourth process) to the laminating apparatus 308, and the resin film of the PVA layer of the laminate is By applying the adhesive 114 to the surface on the opposite side (the surface on which the resin film is not laminated: the upper surface in the figure), and bonding the protective film 115 delivered from the delivery device 307 (fifth step) can get.
  • the obtained polarizing plate 120 can be taken up by a take-up device 310 to form a roll, and can be subjected to a further process.
  • the adhesive 114 used to bond the protective film 115 to the PVA layer 111 in the fifth step is not particularly limited, and, for example, acrylic adhesive, epoxy adhesive, urethane adhesive, polyester Adhesive, polyvinyl alcohol adhesive, polyolefin adhesive, modified polyolefin adhesive, polyvinyl alkyl ether adhesive, rubber adhesive, vinyl chloride-vinyl acetate adhesive, SEBS (styrene-ethylene-butylene- Styrene copolymer) Adhesives, ethylene adhesives such as ethylene-styrene copolymer, acrylic acid esters such as ethylene-methyl (meth) acrylate copolymer, ethylene- (meth) acrylate copolymer Adhesives, etc. may be mentioned.
  • Examples of the protective film 115 used in the fifth step include films made of one or more resins selected from cycloolefin resins, acrylic resins, polyethylene terephthalate resins, and triacetylcellulose resins.
  • the polarizing plate of the present embodiment also manufactures a polarizing plate by stretching a laminate having a resin film and a PVA layer laminated directly on the resin film, as in the polarizing plate of Embodiment 1. It has the same effect as that of the form 1.
  • the protective film 115 is provided on the side of the PVA layer 111 on which the resin film 112 is not laminated, the surface of the PVA layer 111 can be prevented from being scratched or the like.
  • Embodiment 1 shows a laminate for a polarizing plate in which a PVA layer is laminated on one surface of a resin film, and in Embodiments 1 and 2, a polarizing plate manufactured using the laminate is shown.
  • the laminate for polarizing plate may be a laminate in which PVA layers are laminated on both sides of a resin film, and the polarizing plate may be a polarizing plate manufactured using the above-mentioned laminate.
  • stacked directly on the said resin film was shown in Embodiment 1, the resin film and a PVA layer were between resin film and a PVA layer. It may be a laminate further comprising a layer for enhancing the bonding strength with the above.
  • the hydrogenation rate of the block copolymer hydride was calculated by 1 H-NMR spectrum or GPC analysis.
  • the region having a hydrogenation rate of 99% or less was calculated by measuring 1 H-NMR spectrum, and the region exceeding 99% was calculated by GPC analysis from the ratio of peak areas by a UV detector and an RI detector.
  • the retardation Re2 in the in-plane direction of the resin film, which is generated when the free end uniaxial stretching is performed at 0 times, is determined to be 0 nm or more and 20 nm or less.
  • the liquid crystal display panel is removed from the liquid crystal display device (manufactured by LG Electronics Japan, trade name "IPS panel monitor (23MP47)"), and the polarizing plate disposed on the viewing side is peeled off.
  • the resulting polarizing plate was bonded such that the resin film was on the panel side.
  • the polarizer single body without a protective film was bonded next to the polarizing plate produced by the Example and the comparative example, and the liquid crystal display was reassembled.
  • the absorption axes of the polarizing plate prepared in Examples and Comparative Examples and the single polarizer without the protective film were bonded in the same direction as the absorption axis of the polarizing plate before peeling.
  • the panel When the direction of the absorption axis of the polarizing plate disposed on the viewing side is an azimuth angle of 0 ° and the vertical direction of the panel is a polar angle of 0 °, the panel is displayed in black (that is, black color is displayed on the entire display screen of the panel) In a state of 45 ° azimuth and 45 ° polar angle, the same color change as in the case of a polarizer without a protective film and the one with a slight color change are B, Those with a large change were judged to be C.
  • Example 1 (1-1) Preparation of Polymer X Referring to the production example described in JP-A-2002-105151, after 25 parts of the styrene monomer are polymerized in the first step, 30 parts of the styrene monomer in the second step and After 25 parts of isoprene monomer is polymerized and then 20 parts of styrene monomer is polymerized in the third step to obtain a block copolymer [D1], the block copolymer is hydrogenated to obtain a hydrogenated block copolymer [ E1] was synthesized.
  • Mw of the block copolymer hydride [E1] was 84,500, Mw / Mn was 1.20, and the hydrogenation rate of the main chain and the aromatic ring was almost 100%.
  • 100 parts of block copolymer hydride [E1], pentaerythrityl tetrakis [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate] (manufactured by Matsubara Sangyo Co., Ltd.) as an antioxidant
  • 0.1 parts of the name "Songnox 1010” was melt-kneaded and blended, it was pelletized to obtain a polymer X for molding.
  • the thickness of the resin film in the obtained laminate, the thickness of the polyvinyl alcohol layer and the retardation Re1 in the in-plane direction, and the retardation Re2 were measured. The results are shown in Table 1.
  • (1-3) Production of Polarizing Plate The following operation was performed while continuously conveying the laminate produced in (1-2) in the longitudinal direction via a guide roll.
  • the above-mentioned laminate was subjected to a swelling treatment in which it was immersed in water, a dyeing treatment in which it was immersed in a dyeing solution containing iodine and potassium iodide, and a first stretching treatment to stretch the laminate after the dyeing treatment.
  • the laminate after the first stretching treatment was subjected to a second stretching treatment of stretching in a bath containing boric acid and potassium iodide.
  • the total draw ratio represented by the product of the draw ratio in the first drawing process and the draw ratio in the second drawing process was set to 6.0.
  • the stretching temperature was 57 ° C.
  • the laminate after the second stretching treatment was dried in a dryer at 70 ° C. for 5 minutes (drying step) to obtain a polarizing plate.
  • the adhesion was evaluated in the steps up to the second stretching treatment, the drying step was evaluated in the drying step, and the black color shift was evaluated for the obtained polarizing plate.
  • the evaluation results are shown in Table 1.
  • the thickness and retardation of the resin film in the obtained polarizing plate, and the thickness of the polyvinyl alcohol layer were measured. The measurement results are shown in Table 1.
  • Example 2 In Example 1 (1-2), 0.1 parts by weight of an organic silicon compound (tetraisopropyl titanate, Organix TA-8, manufactured by Matsumoto Fine Chemical Co., Ltd.) was substituted for 0.1 parts by weight of the organosilicon compound.
  • An organic silicon compound tetraisopropyl titanate, Organix TA-8, manufactured by Matsumoto Fine Chemical Co., Ltd.
  • a laminate and a polarizing plate were produced in the same manner as in Example 1 except that the resin film was formed using the coating solution for film formation added, and evaluation was performed in the same manner as in Example 1. The results are shown in Table 1.
  • Example 3 In Example 1 (1-2), 0.1 parts by weight of an organic zirconium compound instead of 0.1 parts by weight of an organosilicon compound (normal propyl zirconate, Orgatics ZA-45, manufactured by Matsumoto Fine Chemical Co., Ltd.) A laminate and a polarizing plate were produced in the same manner as in Example 1 except that a resin film was formed using the coating solution for film formation to which was added, and evaluation was performed in the same manner as in Example 1. The results are shown in Table 1.
  • Example 4 In (1-2) of Example 1, when performing an operation of applying a coating solution for film formation to a separator film using a die coater and drying, the coating amount and the like are adjusted, and the thickness is 5 ⁇ m long
  • a laminate and a polarizing plate were produced in the same manner as in Example 1 except that a resin film of (having the same width and length as in Example 1) was produced, and evaluated in the same manner as in Example 1. The results are shown in Table 1.
  • Example 5 A laminate and a polarizing plate were produced in the same manner as in Example 1 except that polyisobutene was not used in (1-2) of Example 1, and evaluation was performed in the same manner as in Example 1. The results are shown in Table 2.
  • Example 6 In (1-2) of Example 1, when the organic silicon compound was not used, and the coating solution for film formation was applied to a separator film using a die coater and dried, A laminate and a polarizing plate are produced and carried out in the same manner as in Example 1 except that the thickness is adjusted to produce a long resin film (the width and the length are the same as in Example 1). Evaluation was performed in the same manner as Example 1. The results are shown in Table 2.
  • Example 1 instead of the resin film produced in (1-2), a cycloolefin resin film (Zeonor film, hydrogenated ring-opened polymer of alicyclic hydrocarbon, Nippon Zeon Co., Ltd. A laminate was produced in the same manner as in Example 1 except that a product having a thickness of 13 ⁇ m was used. When the same operation as in (1-4) of Example 1 was performed using the laminate, breakage occurred in the first stretching treatment, and a polarizing plate could not be produced.
  • a cycloolefin resin film Zeonor film, hydrogenated ring-opened polymer of alicyclic hydrocarbon, Nippon Zeon Co., Ltd.
  • a laminate was produced in the same manner as in Example 1 except that a product having a thickness of 13 ⁇ m was used.
  • Tables 1 and 2 show the evaluation results of Examples, Comparative Examples, and Reference Examples.
  • COP means cycloolefin resin.
  • Re 2 (50 ° C.) means a retardation in the in-plane direction of the resin film generated when the laminate is uniaxially stretched free end to 6.0 times at a temperature condition of 50 ° C.
  • the term “Re2 (120 ° C.)” means a retardation in the in-plane direction of the resin film generated when the laminate is uniaxially stretched free end uniaxially at a temperature of 120 ° C. at 6.0 times.
  • Re1 means the retardation in the in-plane direction of the polyvinyl alcohol layer in the laminate.
  • coating indicates a polyvinyl alcohol aqueous solution applied to a resin film to form a PVA layer.
  • the phase difference developed in the resin film after the step of stretching the laminate can be reduced, and the adhesion, the drying step property and the optical properties are excellent. It can be seen that a polarizing plate can be obtained.
  • a resin film can also be used as a protective film, and a laminate for a polarizing plate and a method for producing the same, which can be efficiently produced even if the thickness is thin, a polarizing plate using the laminate, and a method for producing the same
  • a laminate film roll for polarizing plate can be provided.

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PCT/JP2018/047638 2017-12-28 2018-12-25 偏光板用積層体、偏光板、偏光板用積層体フィルムロール、偏光板用積層体の製造方法及び偏光板の製造方法 WO2019131666A1 (ja)

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JP2011013378A (ja) * 2009-06-30 2011-01-20 Nippon Zeon Co Ltd フィルム
JP2017097048A (ja) * 2015-11-19 2017-06-01 日本合成化学工業株式会社 偏光板用積層体および偏光板

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JP4691205B1 (ja) 2010-09-03 2011-06-01 日東電工株式会社 薄型高機能偏光膜を含む光学フィルム積層体の製造方法
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WO2016060070A1 (ja) * 2014-10-15 2016-04-21 日本ゼオン株式会社 ブロック共重合体水素化物、およびそれからなる延伸フィルム
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JP2011013378A (ja) * 2009-06-30 2011-01-20 Nippon Zeon Co Ltd フィルム
JP2017097048A (ja) * 2015-11-19 2017-06-01 日本合成化学工業株式会社 偏光板用積層体および偏光板

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