WO2017115614A1 - 樹脂フィルム付光学部材の製造方法 - Google Patents

樹脂フィルム付光学部材の製造方法 Download PDF

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Publication number
WO2017115614A1
WO2017115614A1 PCT/JP2016/086048 JP2016086048W WO2017115614A1 WO 2017115614 A1 WO2017115614 A1 WO 2017115614A1 JP 2016086048 W JP2016086048 W JP 2016086048W WO 2017115614 A1 WO2017115614 A1 WO 2017115614A1
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adhesive layer
pressure
sensitive adhesive
resin film
optical member
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PCT/JP2016/086048
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English (en)
French (fr)
Japanese (ja)
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弘也 中川
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住友化学株式会社
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/12—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by mechanical means
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J201/00—Adhesives based on unspecified macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements

Definitions

  • This invention relates to the manufacturing method of the optical member with a resin film formed by bonding a resin film to an optical member through an adhesive layer, and also relates to the resin film with an adhesive layer.
  • optical members represented by polarizing plates and the like are sometimes used by being bonded to other members via an adhesive layer (for example, Patent Document 1).
  • the optical member may be marketed in the form of an optical member with an adhesive layer in which an adhesive layer is previously provided on one surface thereof.
  • a peelable separate film also referred to as a “release film” for protecting the surface is temporarily attached to the outer surface of the pressure-sensitive adhesive layer.
  • the adhesive layer used to bond the optical member to another member is required to have good adhesion to the optical member.
  • the adhesiveness of the pressure-sensitive adhesive layer used to bond the optical member to another member is not sufficient, the durability of the composite member formed by bonding the optical member and the other member via the pressure-sensitive adhesive layer And reliability may be reduced.
  • An object of the present invention is an optical member with a resin film formed by bonding a resin film to an optical member via an adhesive layer, such as an optical member with an adhesive layer provided with the above-described separate film. It is providing the method for manufacturing the optical member with a resin film with favorable adhesiveness of an agent layer and an optical member. Moreover, the objective of this invention is providing the resin film with an adhesive layer with favorable adhesiveness with an optical member.
  • This invention provides the manufacturing method of the optical member with a resin film shown below.
  • a coating process in which a pressure-sensitive adhesive composition is coated on a long resin film to form a coating layer;
  • the manufacturing method of the optical member with a resin film containing The manufacturing method of the optical member with a resin film containing.
  • the concave groove forming step is a step of forming a concave groove from the edge portion to the first end region of the width L 1 of the pressure-sensitive adhesive layer,
  • the width L 1 of the first end region satisfies the relationship of the following formula (1) when the length in the width direction of the pressure-sensitive adhesive layer is L 0.
  • the bonding step further includes an ablation step of the resin film with an optical member, to ablate the second end region from the edge portion of the width L 2 of the pressure-sensitive adhesive layer,
  • the width L 2 of the second end region satisfies the relation of equation (2) below, the production method according to [4].
  • the pressure-sensitive adhesive layer is a resin film with a pressure-sensitive adhesive layer, which has a plurality of concave grooves reaching the edge of the pressure-sensitive adhesive layer on the outer surface thereof.
  • the concave groove is formed in the first end region of the width L 1 from the end edge of the pressure-sensitive adhesive layer, Width L 1 of the first end region, when the length in the width direction of the pressure-sensitive adhesive layer and L 0 satisfy the following equation (1), a resin film with an adhesive layer according to [10].
  • an optical member with a resin film having good adhesion between the pressure-sensitive adhesive layer and the optical member.
  • the resin film with an adhesive layer with favorable adhesiveness with an optical member can be provided.
  • the method for producing an optical member with a resin film according to the present invention includes the following steps: A coating process in which a pressure-sensitive adhesive composition is coated on a long resin film to form a coating layer; A drying step of obtaining a resin film having a pressure-sensitive adhesive layer by introducing it into a drying means while continuously transporting the film after the coating step and drying the coating layer; While continuously transporting the resin film having the pressure-sensitive adhesive layer, a groove forming process step of pressing a concave and convex mold against the outer surface of the pressure-sensitive adhesive layer; and continuously transporting the resin film after the groove-shaped groove forming step
  • the manufacturing method of the optical member with a resin film which concerns on this invention can further include other processes other than the above.
  • each step will be described with reference to FIGS.
  • the resin film which has an adhesive layer which is a film intermediate body bonded by an optical member is also called "resin film with an adhesive layer.”
  • This step is a step of forming the coating layer 11 by coating the adhesive composition on the resin film 10 with the coating device 50 to obtain the resin film 15 having the coating layer 11 (FIG. 1). And FIG. 2).
  • the resin film 10 is usually a thermoplastic resin film, preferably a light-transmitting (more preferably optically transparent) thermoplastic resin film.
  • thermoplastic resins include polyolefin resins such as chain polyolefin resins (polyethylene resins, polypropylene resins, etc.) and cyclic polyolefin resins (norbornene resins, etc.); polyvinyl fluoride, polyvinylidene fluoride, polyfluoride Fluorinated polyolefin resins such as fluorinated ethylene; polyester resins such as polyethylene terephthalate resins and polyethylene naphthalate resins; (meth) acrylic resins such as methyl methacrylate resins; triacetyl cellulose [TAC], Cellulose resin such as cellulose acetate resin such as diacetyl cellulose; polycarbonate resin; polyvinyl alcohol resin; polyvinyl acetate resin; polyarylate resin; polyimide resin; polys
  • the thickness of the resin film 10 is, for example, about 5 to 200 ⁇ m, preferably 10 to 150 ⁇ m, more preferably 15 to 100 ⁇ m.
  • the resin film with an adhesive layer that is a film intermediate produced in the production method of the present invention can be, for example, a separate film with an adhesive layer.
  • the resin film 10 can be a separate film in which a release treatment is performed on the surface on which the pressure-sensitive adhesive layer is laminated.
  • the mold release treatment are silicone treatment, long chain alkyl treatment, fluorine treatment and the like.
  • the resin film 10 may be an optical member other than a separate film.
  • the resin film 10 which is an optical member other than the separate film may have a single layer structure or a multilayer structure.
  • Specific examples of the resin film 10 that is an optical member include: a polarizing film; an optical functional film such as an optical compensation film (retardation film, etc.), a light diffusion film (sheet), a reflective film (sheet); a protective film for a polarizing film; Including a polarizing plate.
  • pressure-sensitive adhesive compositions applied to the resin film 10 include (meth) acrylic pressure-sensitive adhesive compositions, urethane-based pressure-sensitive adhesive compositions, silicone-based pressure-sensitive adhesive compositions, and polyester-based adhesives. Examples thereof include a pressure-sensitive adhesive composition, a polyamide-based pressure-sensitive adhesive composition, a polyether-based pressure-sensitive adhesive composition, a fluorine-based pressure-sensitive adhesive composition, and a rubber-based pressure-sensitive adhesive composition. Of these, a (meth) acrylic pressure-sensitive adhesive having a (meth) acrylic resin as a base polymer is preferably used from the viewpoints of transparency, adhesive strength, reliability, reworkability, and the like.
  • (Meth) acrylic resin (A-1) which is a polymer having a structural unit derived from a (meth) acrylic acid ester represented by the formula (containing 50% by weight or more) as a main component.
  • R 1 represents a hydrogen atom or a methyl group
  • R 2 represents an alkyl group having 1 to 14 carbon atoms which may be substituted with an alkoxy group having 1 to 10 carbon atoms
  • R 2 is preferably an alkyl group having 1 to 14 carbon atoms which may be substituted with an alkoxy group having 1 to 10 carbon atoms.
  • (meth) acrylic acid ester represented by the formula (I) include a straight chain such as methyl acrylate, ethyl acrylate, propyl acrylate, n-butyl acrylate, n-octyl acrylate and lauryl acrylate.
  • Chain alkyl acrylates Branched alkyl acrylates such as isobutyl acrylate, 2-ethylhexyl acrylate, isooctyl acrylate; methyl methacrylate, ethyl methacrylate, propyl methacrylate, n-butyl methacrylate Linear alkyl methacrylates such as n-octyl methacrylate and lauryl methacrylate; branched alkyl esters such as isobutyl methacrylate, 2-ethylhexyl methacrylate and isooctyl methacrylate;
  • R 2 is an alkyl group substituted with an alkoxy group
  • specific examples of the (meth) acrylic acid ester represented by formula (I) when R 2 is an alkoxyalkyl group are acrylic acid 2- Including methoxyethyl, ethoxymethyl acrylate, 2-methoxyethyl methacrylate, ethoxymethyl methacrylate and the like.
  • Specific examples of the (meth) acrylic acid ester represented by the formula (I) when R 2 is an aralkyl group having 7 to 21 carbon atoms include benzyl acrylate, benzyl methacrylate and the like.
  • (Meth) acrylic acid ester represented by formula (I) may be used alone or in combination of two or more.
  • the (meth) acrylic acid ester preferably contains n-butyl acrylate.
  • the (meth) acrylic resin (A-1) preferably contains 50% by weight or more of n-butyl acrylate in all monomers constituting the (meth) acrylic resin (A-1).
  • other (meth) acrylic acid esters represented by the formula (I) may be used in combination.
  • the (meth) acrylic resin (A-1) usually comprises a (meth) acrylic acid ester of the above formula (I) and at least one other monomer typified by a monomer having a polar functional group. It is a copolymer.
  • the monomer having a polar functional group is preferably a (meth) acrylic acid compound having a polar functional group.
  • polar functional groups include free carboxyl groups, hydroxyl groups, amino groups, and heterocyclic groups including epoxy groups.
  • the monomer having a polar functional group include (meth) acrylic acid, a monomer having a free carboxyl group such as ⁇ -carboxyethyl (meth) acrylate; 2-hydroxyethyl (meth) acrylate, ( 3-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, 2- (2-hydroxyethoxy) ethyl (meth) acrylate, 2- or 3-chloro-2-hydroxypropyl (meth) acrylate , Monomers having a hydroxyl group such as diethylene glycol mono (meth) acrylate; acryloylmorpholine, vinylcaprolactam, N-vinyl-2-pyrrolidone, vinylpyridine, tetrahydrofurfuryl (meth) acrylate, caprolactone-modified tetrahydrofurfuryl acrylate, 3 , 4-epoxycyclohe Monomers having a heterocyclic group such as silmethyl,
  • a hydroxyl group is one of the polar functional group-containing monomers constituting the (meth) acrylic resin (A-1). It is preferable to use the monomer which has. In addition to the monomer having a hydroxyl group, it is also effective to use a monomer having another polar functional group, for example, a monomer having a free carboxyl group.
  • the (meth) acrylic resin (A-1) is a monomer having one olefinic double bond and at least one aromatic ring in the molecule (provided that the monomer represented by the above formula (I)).
  • a structural unit derived from a monomer and a monomer having a polar functional group is excluded.
  • Preferable examples include (meth) acrylic acid compounds having an aromatic ring.
  • Suitable examples of the (meth) acrylic acid compound having an aromatic ring include the following formula (II):
  • R 3 represents a hydrogen atom or a methyl group
  • n represents an integer of 1 to 8
  • R 4 represents a hydrogen atom, an alkyl group, an aralkyl group or an aryl group.
  • R 4 is an alkyl group
  • its carbon number can be about 1 to 9
  • when it is an aryl group, its carbon number is 6 Can be on the order of ⁇ 10.
  • Examples of the alkyl group having 1 to 9 carbon atoms constituting R 4 in the formula (II) include methyl, butyl, and nonyl.
  • Examples of the aralkyl group having 7 to 11 carbon atoms include benzyl, phenethyl, naphthylmethyl, and the like.
  • Examples of the aryl group having 6 to 10 carbon atoms include phenyl, tolyl, naphthyl and the like.
  • phenoxyethyl group-containing (meth) acrylic acid ester represented by the formula (II) include 2-methoxyethyl (meth) acrylate, 2- (2-phenoxyethoxy) ethyl (meth) acrylate, ethylene oxide (Meth) acrylic acid ester of modified nonylphenol, 2- (o-phenylphenoxy) ethyl (meth) acrylate, and the like. Only one type of phenoxyethyl group-containing (meth) acrylic acid ester may be used alone, or two or more types may be used in combination.
  • phenoxyethyl group-containing (meth) acrylic acid esters include 2-phenoxyethyl (meth) acrylate, 2- (o-phenylphenoxy) ethyl (meth) acrylate and / or 2- (2) (meth) acrylic acid.
  • -Phenoxyethoxy) ethyl is preferably included.
  • the (meth) acrylic resin (A-1) is preferably a structural unit derived from the (meth) acrylic acid ester represented by the above formula (I), preferably 60 to 99. 9% by weight, more preferably 80 to 99.6% by weight of structural units derived from a monomer having a polar functional group, preferably 0.1 to 20% by weight, more preferably 0.8%. 4 to 10% by weight of a structural unit derived from a monomer having one olefinic double bond and at least one aromatic ring in the molecule, preferably 0 to 40% by weight, More preferably, it can be contained in a proportion of 6 to 12% by weight.
  • the (meth) acrylic resin (A-1) includes a (meth) acrylic acid ester represented by the formula (I), a monomer having a polar functional group, and one olefinic double bond in the molecule.
  • a structural unit derived from a monomer other than the monomer having at least one aromatic ring (hereinafter also referred to as “other monomer”) may be included.
  • Specific examples of other monomers are derived from structural units derived from (meth) acrylic acid esters having an alicyclic structure in the molecule, structural units derived from styrene monomers, and vinyl monomers.
  • the structural unit includes a structural unit derived from a monomer having a plurality of (meth) acryloyl groups in the molecule, a structural unit derived from a (meth) acrylamide monomer, and the like. Other monomers may be used alone or in combination of two or more.
  • the alicyclic structure usually has 5 or more carbon atoms, preferably about 5 to 7 carbon atoms.
  • Specific examples of the (meth) acrylic acid ester having an alicyclic structure include isobornyl (meth) acrylate, cyclohexyl (meth) acrylate, dicyclopentanyl (meth) acrylate, cyclododecyl (meth) acrylate, ( Examples include methyl cyclohexyl acrylate, trimethyl cyclohexyl (meth) acrylate, tert-butyl cyclohexyl (meth) acrylate, cyclohexyl phenyl (meth) acrylate, cyclohexyl ⁇ -ethoxy acrylate, and the like.
  • styrenic monomer examples include styrene; alkyl styrene such as methyl styrene, dimethyl styrene, trimethyl styrene, ethyl styrene, diethyl styrene, triethyl styrene, propyl styrene, butyl styrene, hexyl styrene, heptyl styrene, octyl styrene; Halogenated styrene such as fluorostyrene, chlorostyrene, bromostyrene, dibromostyrene, iodostyrene; nitrostyrene, acetylstyrene, methoxystyrene, divinylbenzene and the like.
  • alkyl styrene such as methyl styrene, di
  • vinyl monomers include vinyl acetate, vinyl propionate, vinyl butyrate, vinyl 2-ethylhexanoate, vinyl laurate, and other fatty acid vinyl esters; vinyl chloride, vinyl bromide, such as vinyl bromide;
  • vinylidene halides such as vinylidene chloride
  • nitrogen-containing aromatic vinyls such as vinylpyridine, vinylpyrrolidone and vinylcarbazole
  • conjugated diene monomers such as butadiene, isoprene and chloroprene
  • acrylonitrile methacrylonitrile and the like.
  • monomers having a plurality of (meth) acryloyl groups in the molecule include 1,4-butanediol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, and 1,9-nonanediol.
  • the (meth) acrylamide compound examples include N-methylol (meth) acrylamide, N- (2-hydroxyethyl) (meth) acrylamide, N- (3-hydroxypropyl) (meth) acrylamide, and N- (4-hydroxy).
  • the (meth) acrylic resin (A-1) contains other monomers in a proportion of usually 0 to 20% by weight, preferably 0 to 10% by weight, based on the total amount of the solid content.
  • the (meth) acrylic resin (A-1) has a weight average molecular weight (Mw) in terms of standard polystyrene by gel permeation chromatography (GPC) of 500,000. It is preferable that it is above, and it is more preferable that it is 600,000 or more.
  • Mw of the (meth) acrylic resin (A-1) is usually 1.7 million or less.
  • the base polymer of the (meth) acrylic pressure-sensitive adhesive composition may contain two or more types of (meth) acrylic resin (A-1).
  • the base polymer is a different (meth) acrylic resin, for example, a structural unit derived from a (meth) acrylic acid ester of the formula (I) And a structural unit derived from a (meth) acrylic resin (A-2) having no polar functional group and a (meth) acrylic acid ester represented by the above formula (I) as a main component, Mw (Meth) acrylic resin (A-3) or the like in the range of from 50,000 to 120,000.
  • the pressure-sensitive adhesive composition may further contain a crosslinking agent (B).
  • the crosslinking agent is a compound that reacts with a structural unit derived from a polar functional group-containing monomer in a base polymer such as a (meth) acrylic resin to crosslink the base polymer.
  • a base polymer such as a (meth) acrylic resin
  • Specific examples include isocyanate compounds, epoxy compounds, aziridine compounds, metal chelate compounds, and the like.
  • the isocyanate compound, the epoxy compound, and the aziridine compound have at least two functional groups that can react with the polar functional group in the base polymer. Only 1 type may be used for a crosslinking agent (B) individually, and 2 or more types may be used together.
  • An isocyanate compound is a compound having at least two isocyanato groups (—NCO) in the molecule.
  • Specific examples of the isocyanate compound include tolylene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, xylylene diisocyanate, hydrogenated xylylene diisocyanate, diphenylmethane diisocyanate, hydrogenated diphenylmethane diisocyanate, naphthalene diisocyanate, triphenylmethane triisocyanate and the like.
  • adducts obtained by reacting these isocyanate compounds with polyols such as glycerol and trimethylolpropane, and those obtained by converting isocyanate compounds into dimers, trimers, and the like can also serve as the crosslinking agent (B).
  • An epoxy compound is a compound having at least two epoxy groups in the molecule.
  • Specific examples of the epoxy compound include bisphenol A type epoxy resin, ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, glycerin diglycidyl ether, glycerin triglycidyl ether, 1,6-hexanediol diglycidyl ether, trimethylolpropane.
  • triglycidyl ether N, N-diglycidylaniline, N, N, N ′, N′-tetraglycidyl-m-xylenediamine, 1,3-bis (N, N′-diglycidylaminomethyl) cyclohexane, etc. .
  • An aziridine compound is a compound having at least two three-membered ring skeletons composed of one nitrogen atom and two carbon atoms, also called ethyleneimine.
  • Specific examples of the aziridine compound include diphenylmethane-4,4′-bis (1-aziridinecarboxamide), toluene-2,4-bis (1-aziridinecarboxamide), triethylenemelamine, isophthaloylbis-1- (2 -Methylaziridine), tris-1-aziridinylphosphine oxide, hexamethylene-1,6-bis (1-aziridinecarboxamide), trimethylolpropane-tris- ⁇ -aziridinylpropionate, tetramethylolmethane-tris - ⁇ -aziridinyl propionate and the like.
  • metal chelate compounds include compounds in which acetylacetone or ethyl acetoacetate is coordinated to a polyvalent metal such as aluminum, iron, copper, zinc, tin, titanium, nickel, antimony, magnesium, vanadium, chromium and zirconium. Including.
  • the crosslinking agent (B) is usually in a proportion of 0.05 to 5 parts by weight, preferably 0.1 to 5 parts by weight, based on 100 parts by weight of the solid content of the base polymer (the total when two or more are used). Contained. When the content of the crosslinking agent (B) is 0.05 parts by weight or more, the durability of the pressure-sensitive adhesive layer tends to be improved.
  • the pressure-sensitive adhesive composition can further contain an ionic compound (C) as an antistatic agent.
  • the ionic compound (C) is, for example, a compound having an inorganic cation or an organic cation and an inorganic anion or an organic anion.
  • Examples of the inorganic cation include alkali metal ions such as lithium cation [Li + ], sodium cation [Na + ], and potassium cation [K + ], beryllium cation [Be 2+ ], and magnesium cation [Mg 2+ ]. And alkaline earth metal ions such as calcium cation [Ca 2+ ].
  • organic cation examples include an imidazolium cation, a pyridinium cation, a pyrrolidinium cation, an ammonium cation, a sulfonium cation, and a phosphonium cation.
  • the organic cation component is excellent in compatibility in the pressure-sensitive adhesive composition.
  • organic cation components a pyridinium cation and an imidazolium cation are advantageous in terms of antistatic properties.
  • inorganic anions include chloride anions [Cl ⁇ ], bromide anions [Br ⁇ ], iodide anions [I ⁇ ], tetrachloroaluminate anions [AlCl 4 ⁇ ], heptachlorodialuminate anions [Al 2 Cl 7 ⁇ ], tetrafluoroborate anion [BF 4 ⁇ ], hexafluorophosphate anion [PF 6 ⁇ ], perchlorate anion [ClO 4 ⁇ ], nitrate anion [NO 3 ⁇ ], hexafluoroarsenate anion [AsF 6] - ], Hexafluoroantimonate anion [SbF 6 ⁇ ], hexafluoro niobate anion [NbF 6 ⁇ ], hexafluoro tantalate anion [TaF 6 ⁇ ], dicyanamide anion [(CN) 2 N ⁇ ] and the
  • organic anion examples include acetate anion [CH 3 COO ⁇ ], trifluoroacetate anion [CF 3 COO ⁇ ], methanesulfonate anion [CH 3 SO 3 ⁇ ], trifluoromethanesulfonate anion [CF 3 SO 3 ⁇ ], p-toluenesulfonate anion [p-CH 3 C 6 H 4 SO 3 ⁇ ], bis (fluorosulfonyl) imide anion [(FSO 2 ) 2 N ⁇ ], bis (trifluoromethanesulfonyl) imide anion [(CF 3 SO 2 ) 2 N ⁇ ], tris (trifluoromethanesulfonyl) methanide anion [(CF 3 SO 2 ) 3 C ⁇ ], dimethyl phosphinate anion [(CH 3 ) 2 POO ⁇ ], (poly) hydrofluorofluoride anion [ F (HF) n ⁇ ] (n is about
  • ionic compound (C) can be appropriately selected from the combination of the cation component and the anion component.
  • the examples of the ionic compound (C) having an organic cation are classified according to the structure of the organic cation, the following may be mentioned.
  • Pyridinium salt N-hexylpyridinium hexafluorophosphate, N-octylpyridinium hexafluorophosphate, N-octyl-4-methylpyridinium hexafluorophosphate, N-butyl-4-methylrupyridinium hexafluorophosphate, Tetrabutylammonium hexafluorophosphate, N-decylpyridinium bis (fluorosulfonyl) imide, N-dodecylpyridinium bis (fluorosulfonyl) imide, N-tetradecylpyridinium bis (fluorosulfonyl) imide, N-hexadecylpyridinium bis (fluorosulfonyl) imide, N-dodecyl-4-methylpyridinium bis (fluorosulfonyl) imide, N-tetradecyl-4-
  • Imidazolium salt 1-ethyl-3-methylimidazolium hexafluorophosphate, 1-ethyl-3-methylimidazolium p-toluenesulfonate, 1-ethyl-3-methylimidazolium bis (fluorosulfonyl) imide 1-ethyl-3-methylimidazolium bis (trifluoromethanesulfonyl) imide 1-butyl-3-methylimidazolium methanesulfonate, 1-butyl-3-methylimidazolium bis (fluorosulfonyl) imide.
  • Pyrrolidinium salt N-butyl-N-methylpyrrolidinium hexafluorophosphate, N-butyl-N-methylpyrrolidinium bis (fluorosulfonyl) imide N-butyl-N-methylpyrrolidinium bis (trifluoromethanesulfonyl) imide.
  • Quaternary ammonium salt Tetrabutylammonium p-toluenesulfonate, (2-hydroxyethyl) trimethylammonium bis (trifluoromethanesulfonyl) imide, (2-Hydroxyethyl) trimethylammonium dimethylphosphinate.
  • Examples of the ionic compound (C) having an inorganic cation include the following. Lithium bromide, Lithium iodide, Lithium tetrafluoroborate, Lithium hexafluorophosphate, Lithium thiocyanate, Lithium perchlorate, Lithium trifluoromethanesulfonate, Lithium bis (fluorosulfonyl) imide lithium bis (trifluoromethanesulfonyl) imide, Lithium bis (pentafluoroethanesulfonyl) imide, Lithium tris (trifluoromethanesulfonyl) methanide, Lithium p-toluenesulfonate, Sodium hexafluorophosphate, Sodium bis (fluorosulfonyl) imide, Sodium bis (trifluoromethanesulfonyl) imide, Sodium p-toluenesul
  • the ionic compound (C) preferably has a melting point of 30 ° C. or higher, more preferably 35 ° C. or higher, from the viewpoint of sustaining antistatic properties.
  • the ionic compound (C) preferably has a melting point of 90 ° C. or less, more preferably 70 ° C. or less, and still more preferably less than 50 ° C., from the viewpoint of compatibility with the base polymer.
  • the ionic compound (C) is preferably 0.2 to 8 parts by weight, more preferably 0.2 to 5 parts by weight with respect to 100 parts by weight of the solid content of the base polymer (the total when two or more are used). It is blended at a ratio of parts.
  • the content of the ionic compound (C) being 0.2 parts by weight or more is advantageous for improving the antistatic property, and the content of 8 parts by weight or less is advantageous for improving the durability of the pressure-sensitive adhesive layer. is there.
  • the pressure-sensitive adhesive composition is used to improve the adhesion between the pressure-sensitive adhesive layer and the glass when the pressure-sensitive adhesive layer of the resin film with the pressure-sensitive adhesive layer is bonded to an optical member made of glass.
  • the silane compound (D) can further be contained.
  • silane compound (D) examples include vinyltrimethoxysilane, vinyltriethoxysilane, vinyltris (2-methoxyethoxy) silane, N- (2-aminoethyl) -3-aminopropylmethyldimethoxysilane, N- (2 -Aminoethyl) -3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 2- (3,4-epoxycyclohexyl) ) Ethyltrimethoxysilane, 3-chloropropylmethyldimethoxysilane, 3-chloropropyltrimethoxysilane, 3-methacryloyloxypropyltrimethoxysilane, 3-mercaptopropyltrimethoxysilane, 3-glycidoxypropyltrime
  • the silane compound (D) may be of a silicone oligomer type.
  • a silicone oligomer the following can be mentioned, for example.
  • the ratio of the silane compound (D) is usually 0.01 to 10 parts by weight, preferably 0.05 to 5 parts by weight, based on 100 parts by weight of the solid content of the base polymer (the total when two or more are used). Contained.
  • the adhesive improvement effect of an adhesive layer and glass is easy to be acquired as content of a silane compound (D) is 0.01 weight part or more. Moreover, the bleeding out of the silane compound (D) from an adhesive layer can be suppressed as content is 10 weight part or less.
  • the pressure-sensitive adhesive composition contains additives such as a crosslinking catalyst, weathering stabilizer, tackifier, plasticizer, softener, dye, pigment, inorganic filler, light scattering fine particles, and tackifier. Can be contained.
  • an ultraviolet curable compound can be blended in the pressure-sensitive adhesive composition, and after forming the pressure-sensitive adhesive layer, it can be cured by irradiating with ultraviolet rays to form a harder pressure-sensitive adhesive layer.
  • the pressure-sensitive adhesive composition is usually prepared as a pressure-sensitive adhesive liquid in which a compounding component is dissolved or dispersed by containing an organic solvent.
  • the organic solvent is preferably selected according to the type of the base polymer. Specific examples of the organic solvent include aromatic hydrocarbons such as toluene and xylene; aliphatic hydrocarbons such as hexane, heptane and pentane; ketones such as methyl ethyl ketone and methyl isobutyl ketone; ethyl acetate and butyl acetate. Including various esters.
  • the concentration of the base polymer in the adhesive liquid is usually 3 to 20% by weight.
  • the method of applying the pressure-sensitive adhesive composition to the resin film 10 using the coating apparatus 50 is not particularly limited.
  • the slot die method, the reverse gravure coating method, and the micro gravure method , Dipping method, roll coating method, flexographic printing method and the like can be used.
  • the thickness of the coating layer 11 which consists of an adhesive composition is adjusted so that the thickness of the adhesive layer 13 of the resin film 25 with an adhesive layer may become the range mentioned later.
  • the adhesive composition is continuously applied to one surface of the long resin film 10 that is continuously unwound from the first feeding roll 1. It can be a process. Under the present circumstances, as FIG. 1 shows, you may apply an adhesive composition, winding the resin film 10 on the roll 60 for coating.
  • the coated surface of the resin film 10 is subjected to corona treatment, plasma treatment, ultraviolet irradiation treatment, flame (flame) treatment, saponification treatment, primer layer formation treatment, etc.
  • a surface treatment may be applied.
  • This step is a step in which the coating layer 11 of the resin film 15 having the coating layer 11 is dried (solvent volatilization) to obtain the resin film 20 having the pressure-sensitive adhesive layer 12 (see FIGS. 1 and 3).
  • the drying process can be carried out by continuously conveying the long resin film 15 having the coating layer 11 obtained by the coating process and passing it through the drying means 70 (introduction).
  • the drying means 70 is not particularly limited as long as it can volatilize the solvent, and is, for example, a drying furnace (heating furnace).
  • the drying furnace may further include a decompression means in addition to the heating means.
  • the drying conditions such as the amount of hot air supplied to the drying furnace, the temperature and pressure in the drying furnace, take into account the type of solvent contained in the coating layer 11 and the surface condition after drying such as smoothness and condensation. Is set appropriately.
  • the drying temperature (for example, the temperature in the drying furnace) is usually 50 to 120 ° C., preferably 60 to 110 ° C.
  • This step is a step of forming the concave groove 14 on the outer surface of the pressure-sensitive adhesive layer 12 of the resin film 20 having the pressure-sensitive adhesive layer 12 by pressing the concave-convex mold (see FIGS. 1 and 4). Through this step, the pressure-sensitive adhesive layer-attached resin film 25 having the pressure-sensitive adhesive layer 13 (after forming the groove) is continuously produced.
  • the concave groove 14 formed by the concave groove forming step functions as a groove for air bleeding, and the adhesiveness of the adhesive layer 13 to the optical member is improved. Can be improved.
  • the concave groove 14 is formed in multiple numbers so that the edge part 13a of the adhesive layer 13 may be reached.
  • the groove forming step is performed without subjecting to the step of curing the pressure-sensitive adhesive layer 12 obtained by drying the coating layer 11 (without sufficiently proceeding the curing reaction of the pressure-sensitive adhesive). It is in the point to be used for. As a result, it is possible to obtain a more special adhesion improving effect.
  • the above-mentioned groove forming step can be carried out by continuously conveying the long resin film 20 having the pressure-sensitive adhesive layer 12 obtained through the drying step and passing it through the groove forming device 80.
  • the concave groove forming apparatus 80 the concave / convex mold is pressed against the outer surface of the pressure-sensitive adhesive layer 12.
  • the temperature of the pressure-sensitive adhesive layer 12 in contact with the concavo-convex mold is lower than the glass transition temperature of the pressure-sensitive adhesive layer composition. By being less than the glass transition temperature, it is possible to prevent the pressure-sensitive adhesive composition from adhering to the surface of the concavo-convex mold when the pressure-sensitive adhesive layer 12 is peeled from the concavo-convex mold.
  • the temperature of the pressure-sensitive adhesive layer 12 can be adjusted by controlling the atmospheric temperature in the groove forming device 80 or the surface temperature of the concavo-convex mold. In order to prevent dew condensation on the surface of the pressure-sensitive adhesive layer and the surface of the concavo-convex mold, it is preferable to keep the inside of the groove forming device 80 in an atmosphere that does not contain moisture such as dry air or nitrogen.
  • the pressing strength of the concavo-convex mold is not particularly limited as long as the surface shape of the concavo-convex mold is transferred, and can be appropriately adjusted according to the progress of curing of the pressure-sensitive adhesive layer 12.
  • the overall shape of the concave / convex mold is not particularly limited as long as it includes irregularities in the surface shape, and may be a flat plate, a cylindrical or a cylindrical roll. From the viewpoint of continuous productivity, an embossing roll that is a columnar or cylindrical mold is preferred.
  • the embossing roll is preferably a roll with a cooling mechanism whose surface temperature can be controlled by a refrigerant inside the roll.
  • the material of the substrate of the concavo-convex mold is not particularly limited, and can be appropriately selected from metal, glass, carbon, resin, or a composite thereof. From the viewpoint of workability and the like, metal is preferably used. Suitable metal materials include aluminum, iron, or an alloy mainly composed of aluminum or iron from the viewpoint of cost. From the viewpoint of releasability with the pressure-sensitive adhesive layer, a fluororesin is preferably used.
  • the surface of the concavo-convex mold may be subjected to a mold release treatment in order to facilitate separation from the pressure-sensitive adhesive layer.
  • a mold release treatment is fluorine treatment or the like.
  • the pressing strength of the concavo-convex mold to the pressure-sensitive adhesive layer 12 is not particularly limited as long as the surface shape of the concavo-convex mold is transferred to the pressure-sensitive adhesive layer 12.
  • a base is polished, sandblasted, and then subjected to electroless nickel plating to produce a roll mold
  • a roll mold Japanese Patent Laid-Open No. 2006-53371
  • Method of applying copper plating or nickel plating, polishing, sand blasting and then chromium plating Japanese Patent Laid-Open No. 2007-188792
  • polishing after copper plating or nickel plating, sand blasting After performing the etching process, the etching process or the copper plating process is performed, and then the chromium plating is performed (Japanese Patent Laid-Open No.
  • a photosensitive resin film is applied and formed on the polished surface, a pattern is exposed on the photosensitive resin film, developed, and the developed sensitivity Etching process using the photosensitive resin film as a mask, peeling the photosensitive resin film, further etching process, dulling the uneven surface, and then chromium plating the formed uneven surface; and lathe, etc.
  • a method of cutting a base material serving as a mold with a cutting tool International Publication No. 2007/077892 pamphlet.
  • the concavo-convex mold is peeled from the resin film 25 having the pressure-sensitive adhesive layer 13.
  • the peeling method is not particularly limited.
  • the concavo-convex mold is an embossing roll
  • a crimping device such as a nip roll is installed at the separation point between the resin film 25 having the pressure-sensitive adhesive layer 13 and the concavo-convex mold.
  • a method of peeling the resin film 25 having the pressure-sensitive adhesive layer 13 from the concavo-convex mold using the pressure bonding device as a fulcrum is preferably used. Thereby, it becomes possible to peel the resin film 25 which reached the fulcrum efficiently and stably.
  • the thickness of the pressure-sensitive adhesive layer 13 included in the resin film 25 with the pressure-sensitive adhesive layer obtained through the concave groove forming step is, for example, 10 to 45 ⁇ m, preferably 10 to 35 ⁇ m.
  • the thickness of the pressure-sensitive adhesive layer 13 being 45 ⁇ m or less is advantageous for adhesion with an optical member.
  • the followability of the adhesive layer 13 with respect to the dimensional change of an optical member becomes favorable as the thickness is 10 micrometers or more.
  • the groove 14 formed on the surface of the pressure-sensitive adhesive layer 13 is formed so as to reach the end edge portion 13a of the pressure-sensitive adhesive layer 13 (see FIG. 4), and the surface of the pressure-sensitive adhesive layer 13 during the bonding step
  • the air pool generated at the boundary surface is discharged from the end edge portion 13a to the outside through the groove 14.
  • air accumulation tends to occur.
  • the groove 14 allows air to be discharged to the outside, and the adhesion can be remarkably improved.
  • the top surface shape of the groove 14 may be linear or curved, and even if the plurality of grooves 14 are independent without being connected, they are connected. May be.
  • the shape of the upper surface of each groove groove 14 is a straight line and the plurality of groove grooves 14 are formed in parallel with each other. Can be mentioned.
  • the shape of the top surface of each groove groove 14 is a straight line, and the plurality of groove grooves 14 are formed so as to have a lattice shape intersecting each other. Is mentioned.
  • each groove 14 is, for example, 0.1 mm to 50 mm, preferably 1 mm to 20 mm, and more preferably 5 mm to 10 mm.
  • the depth of each groove 14 is, for example, 0.5 ⁇ m to 20 ⁇ m, preferably 1 ⁇ m to 10 ⁇ m.
  • the distance between the adjacent groove 14 and the groove 14 is, for example, 0.1 mm to 50 mm, preferably 1 mm to 20 mm, and more preferably 5 mm to 10 mm.
  • the ratio of the width of the concave groove 14 to the interval between the adjacent concave grooves 14 is usually 1: 3 to 3: 1, and preferably 1: 2 to 2: 1. From the viewpoint that the groove is difficult to be crushed and the shape is easily maintained, the ratio of “width of groove groove: interval” is preferably closer to 1: 2, whereas the ratio is 2 from the viewpoint that air is easy to escape. The closer to 1, the better.
  • FIG. 4 shows the case where the cross-sectional shape of the groove 14 is rectangular, but the cross-sectional shape of the groove 14 is not limited to a rectangular shape, and other cross-sectional shapes are V-shaped.
  • a U-shape or the like is exemplified.
  • FIG. 6 shows an example of the pattern of the groove 14 on the surface of the pressure-sensitive adhesive layer 13.
  • concave groove 14 the area from the edge portion 13a of the width L 1 of the pressure-sensitive adhesive layer (hereinafter referred to as "first end region") may be formed in 13b, a width L 1 of the first end region 13b preferably satisfies the length in the width direction of the pressure-sensitive adhesive layer and L 0 the relationship of equation (1) below.
  • the resin film with the pressure-sensitive adhesive layer-attached resin film and the optical member is attached.
  • the cutting step is preferable because it can be configured such that the groove 14 does not remain in the final product.
  • the second end region, the optical member with a resin film, and the width L 2 of the area from the edge of the adhesive layer Since the second end region includes the first end region 13b, the relationship of the following formula (2) is satisfied.
  • the width L 1 of the first end region is an expression so that the portion to be cut does not become too large from the point that the second end region to be cut is determined to include the first end region. It is preferable that the relationship (1) is satisfied, and it is more preferable that the relationship of the formula (1 ′) is satisfied.
  • the excision method of the second end region is not particularly limited.
  • a method generally called a slitter can be suitably used.
  • An example of a slitter is a method using a razor blade called a leather blade, for example. Even with the method using the same leather blade, there is a hollow cut that slits in the air without providing a backup guide, and a groove roll method that stabilizes the meandering of the slit by inserting the blade into a roll with a groove as a backup guide is there.
  • using two circular blades called shear blades slitting the upper blade with contact pressure on the lower blade while rotating according to the film transport, and blades called shear blade and score blade
  • the “groove roll method using a leather blade” which is a method that can easily change the slit position of the film and is easy to travel, is preferably used.
  • a plurality of grooves 14 are formed in parallel to the direction of the arrow B in the first end regions 13b at both ends.
  • the angle formed by arrow A and arrow B may be less than 90 °. preferable.
  • the angle between the bonding direction (arrow A) and the direction in which the groove 14 is directed from the inside toward the edge portion 13a (arrow B) is less than 90 °, air bleeding is performed in a direction close to the bonding direction. Since it can do, the air bleeding at the time of bonding using the groove 14 can be performed more efficiently.
  • This process is the process of bonding the optical member 30 to the outer surface of the adhesive layer 13 of the resin film 25 with an adhesive layer, and obtaining the optical member 40 with a resin film (refer FIG.1 and FIG.5). As shown in FIG. 5, the optical member with resin film 40 is obtained by laminating and bonding the resin film with adhesive layer 25 to the surface of the optical member 30 through the adhesive layer 13. According to the present invention, it is possible to manufacture the optical member 40 with a resin film having good adhesion between the pressure-sensitive adhesive layer 13 and the optical member 30.
  • the bonding process can be performed as follows.
  • the continuous resin film 25 with the long adhesive layer obtained through the groove forming step is continuously transported and continuously transported while unwinding the long optical member 30 from the second feeding roll 2, and the adhesive layer.
  • the optical member 30 is laminated
  • the pressure-sensitive adhesive layer-attached resin film 25 obtained through the groove forming step is temporarily not rolled up or subjected to other treatments. And it is preferable to supply to the bonding process with the optical member 30 as it is.
  • FIG. 1 shows an example in which the resin film 25 with an adhesive layer is bonded to one side of the optical member 30, but the resin film 25 with an adhesive layer may be bonded to both surfaces of the optical member 30.
  • the resin film 25 with an adhesive layer of both surfaces may be bonded simultaneously, and may be bonded in steps.
  • the optical member 30 can be a single-layer or multilayer optical film or the like.
  • the optical film include: a polarizing film; an optical functional film such as an optical compensation film (retardation film, etc.), a light diffusion film (sheet), a reflective film (sheet); a protective film for a polarizing film; a polarizing plate; (Including glass sheet and glass substrate); Separate film; Substrate film for protective film.
  • the optical member 30 is preferably a polarizing plate.
  • the resin film 25 with an adhesive layer is a separate film with an adhesive layer
  • the optical member 30 is a separate film
  • an adhesive layer with a double-sided separate film (adhesive sheet) Is obtained.
  • the resin film 25 with an adhesive layer is a separate film with an adhesive layer
  • the optical member 30 is a base film for a protective film
  • a protective film with a separate film is obtained as the optical member 40 with a resin film. It is done.
  • the protective film (also referred to as “surface protective film”) is a peelable film temporarily attached to the optical member for the purpose of protecting the surface of the optical member from scratches and dirt, and is usually made of a thermoplastic resin. It is comprised from a base film and the adhesive layer laminated
  • the material of the surface of the optical member 30 that is in contact with the outer surface of the pressure-sensitive adhesive layer 13 is not particularly limited, but the pressure-sensitive adhesive layer 13 and the optical member 30 are still subjected to energy irradiation treatment such as corona treatment on the surface that is normally performed.
  • the manufacturing method according to the present invention is particularly effective when the surface material is such that sufficient adhesion cannot be obtained.
  • Examples of the surface of the optical member 30 in which sufficient adhesion to the pressure-sensitive adhesive layer 13 is difficult to be obtained without the groove forming step include a (meth) acrylic resin (typically made of the resin). Etc.
  • the optical member 30 is a polarizing plate, such a surface is often formed by a protective film bonded to a polarizing film, an optical compensation film (such as a retardation film), or the like.
  • the polarizing plate can be obtained by bonding a protective film to at least one surface of the polarizing film via an adhesive layer.
  • This protective film may also serve as an optical compensation film such as a retardation film.
  • the polarizing plate may be obtained by laminating a cured resin layer formed of a curable resin on at least one surface of the polarizing film.
  • another optical functional film such as a retardation film or a brightness enhancement film may be laminated on the polarizing film or the protective film or the cured resin layer via an adhesive layer or an adhesive layer. .
  • a polarizing film is a film having a function of extracting linearly polarized light from incident natural light, and a suitable example is that a dichroic dye such as iodine or a dichroic dye is adsorbed and oriented on a uniaxially stretched polyvinyl alcohol resin film. It is what.
  • the thickness of the polarizing film is not particularly limited, but is usually 2 to 35 ⁇ m.
  • the protective film can be a thermoplastic resin film having translucency (preferably optically transparent).
  • thermoplastic resins include polyolefin resins such as chain polyolefin resins (polypropylene resins, etc.) and cyclic polyolefin resins (norbornene resins, etc.); polyester resins (polyethylene terephthalate resins, etc.); ) Acrylic resin (methyl methacrylate resin, etc.); Cellulosic resin (cellulose acetate resin such as triacetyl cellulose and diacetyl cellulose); Polycarbonate resin; Polyvinyl alcohol resin; Polyvinyl acetate resin; Polyarylate Polystyrene resin; Polyether sulfone resin; Polysulfone resin; Polyamide resin; Polyimide resin; and mixtures and copolymers thereof.
  • the thickness of the protective film is, for example, about 5 to 200 ⁇ m, preferably 10 to 150 ⁇ m, more preferably 15 to 100 ⁇ m.
  • the cured resin layer is formed from a curable resin such as a thermosetting resin or an active energy ray curable resin.
  • the curable resin may contain a thermopolymerizable compound, may contain a cationically polymerizable compound, or may contain a radically polymerizable compound. May be included.
  • the thickness of the cured resin layer is, for example, about 0.1 to 10 ⁇ m, preferably 1 to 5 ⁇ m.
  • these protective films When protective films are bonded to both surfaces of the polarizing film, these protective films may be composed of the same kind of thermoplastic resin or different kinds of thermoplastic resins. Moreover, the thickness may be the same or different.
  • the cured resin layers When the cured resin layers are laminated on both surfaces of the polarizing film, these cured resin layers may be formed of the same kind of curable resin or different kinds of curable resins. Moreover, the thickness may be the same or different.
  • the protective film or the cured resin layer may have a surface treatment layer (coating layer) such as a hard coat layer, an antiglare layer, an antireflection layer, a light diffusion layer, an antistatic layer, an antifouling layer, or a conductive layer. Good.
  • the pressure-sensitive adhesive layer 13 of the pressure-sensitive adhesive layer-attached resin film 25 may be directly bonded to the surface of the polarizing film.
  • the retardation film is an optical film exhibiting optical anisotropy, and is a uniaxial or biaxially stretched film of a thermoplastic resin film composed of a resin or the like that can be used for the protective film, or a liquid crystal on a thermoplastic resin film. It can be a film that exhibits optical anisotropy by coating / orienting a functional compound, a film that exhibits optical anisotropy by coating an inorganic layered compound on a thermoplastic resin film, and the like.
  • the protective film (or retardation film or the like) can be bonded to the polarizing film via an adhesive layer.
  • an adhesive layer a water-based adhesive, an active energy ray-curable adhesive, or a thermosetting adhesive can be used, and a water-based adhesive and an active energy ray-curable adhesive are preferable.
  • the water-based adhesive examples include an adhesive made of a polyvinyl alcohol-based resin aqueous solution and an aqueous two-component urethane emulsion adhesive.
  • a water-based adhesive composed of a polyvinyl alcohol-based resin aqueous solution is preferably used.
  • Polyvinyl alcohol resins include vinyl alcohol homopolymers obtained by saponifying polyvinyl acetate, which is a homopolymer of vinyl acetate, and copolymers of vinyl acetate and other monomers copolymerizable therewith.
  • a polyvinyl alcohol copolymer obtained by saponifying a polymer, or a modified polyvinyl alcohol polymer obtained by partially modifying the hydroxyl group thereof can be used.
  • the water-based adhesive can contain a crosslinking agent such as an aldehyde compound (glyoxal, etc.), an epoxy compound, a melamine compound, a methylol compound, an isocyanate compound, an amine compound, and a polyvalent metal salt.
  • a crosslinking agent such as an aldehyde compound (glyoxal, etc.), an epoxy compound, a melamine compound, a methylol compound, an isocyanate compound, an amine compound, and a polyvalent metal salt.
  • a drying step for removing water contained in the water-based adhesive after pasting the polarizing film and the protective film.
  • a curing step for curing at a temperature of about 20 to 45 ° C. may be provided.
  • the active energy ray-curable adhesive refers to an adhesive that cures by irradiating active energy rays such as ultraviolet rays, visible rays, X-rays, and electron beams, for example, a polymerizable compound and a photopolymerization initiator.
  • active energy rays such as ultraviolet rays, visible rays, X-rays, and electron beams
  • An ultraviolet curable adhesive is preferable.
  • the polymerizable compound include photopolymerizable monomers such as photocurable epoxy monomers, photocurable (meth) acrylic monomers, and photocurable urethane monomers, and oligomers derived from the photopolymerizable monomers.
  • a photoinitiator what contains the substance which generate
  • an active energy ray-curable adhesive containing a polymerizable compound and a photopolymerization initiator a curable composition containing a photocurable epoxy monomer and a cationic photopolymerization initiator, a photocurable (meth) acrylic monomer, and light
  • a curable composition containing a radical polymerization initiator, a photocurable epoxy monomer, a photocurable (meth) acrylic monomer, a photocationic polymerization initiator, and a photoradical polymerization initiator are preferably used. it can.
  • an active energy ray-curable adhesive When using an active energy ray-curable adhesive, after bonding the polarizing film and the protective film, a drying step is performed as necessary (however, the active energy ray-curable adhesive is substantially free of solvent components). It may be a non-solvent-free adhesive.) Next, a curing step of curing the active energy ray-curable adhesive by irradiating active energy rays is performed.
  • the light source of the active energy ray is not particularly limited, but ultraviolet light having a light emission distribution at a wavelength of 400 nm or less is preferable. Specifically, the low pressure mercury lamp, the medium pressure mercury lamp, the high pressure mercury lamp, the ultrahigh pressure mercury lamp, the chemical lamp, the black light lamp, the micro A wave excitation mercury lamp, a metal halide lamp, etc. can be used.
  • corona treatment Prior to the bonding of the protective film, in order to improve adhesion, corona treatment, plasma treatment, ultraviolet irradiation treatment, flame (flame) treatment, saponification treatment is applied to at least one of the polarizing film and the protective film.
  • a surface activation treatment such as a primer layer forming treatment may be performed.
  • the adhesive for bonding these protective films may be the same type of adhesive or different types of adhesives.
  • the manufacturing method of the present invention can further include a surface activation step of irradiating energy on the bonding surface of the optical member 30 with the pressure-sensitive adhesive layer 13.
  • the energy irradiation treatment can be, for example, a corona treatment, a plasma treatment, an ultraviolet irradiation treatment, or the like.
  • the corona treatment is preferably used from the viewpoint of improving the adhesion and the simplicity of the equipment.
  • the manufacturing method of the present invention includes a winding process in which a long optical member with a resin film 40 obtained through the bonding process is wound around the winding roll 3 to be wound into a roll shape. (See FIG. 1). Moreover, the manufacturing method of this invention can also include the curing process which performs the curing (aging) of the adhesive layer 13 in the roll state after a winding-up process. By performing the curing process, the curing reaction of the pressure-sensitive adhesive layer 13 is promoted, and the pressure-sensitive adhesive force of the pressure-sensitive adhesive layer 13 can be increased.
  • the curing temperature is, for example, 20 to 45 ° C.
  • the manufacturing method of this invention is the optical member 30 (this optical member is also called a "1st optical member") bonded to the adhesive layer 13 of the resin film 25 with an adhesive layer in the bonding process.
  • a replacement step of replacing with another optical member (this optical member is also referred to as “second optical member”) can be included.
  • the replacing step peels and removes the separate film that is the first optical member.
  • a peeling process and the bonding process (2nd bonding process) which bonds the 2nd optical member, such as a polarizing plate, for example to the adhesive layer 13 of the resin film 25 with an adhesive layer can be included subsequently.
  • at least one of the pressure-sensitive adhesive layer 13 and the bonding surface of the second optical member is subjected to corona treatment, plasma treatment, ultraviolet irradiation treatment, frame (flame) treatment, and saponification. Surface treatment such as treatment or primer layer formation treatment may be performed.
  • the adhesiveness between the pressure-sensitive adhesive layer 13 of the resin film 25 with the pressure-sensitive adhesive layer and the optical member 30 (first optical member) can be improved.
  • Adhesion between the second optical member that replaces the first optical member and the pressure-sensitive adhesive layer 13 is caused by performing the groove forming step in a state where the curing reaction of the agent layer 12 has not sufficiently progressed. Can also be increased.
  • the manufacturing method of this invention peels and removes the resin film 10 of the optical member 40 with a resin film obtained through the bonding process like the case where the resin film 10 is a separate film, and exposed the adhesive layer
  • the process of bonding the optical member different from the optical member 30 on the outer surface of 13 can be included.
  • a protective film with a separate film is obtained as the optical member 40 with a resin film.
  • the separation film is peeled and removed therefrom, and a polarizing plate with a protective film can be obtained by bonding the polarizing plate to the exposed outer surface of the pressure-sensitive adhesive layer 13.

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  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
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CN113167955A (zh) * 2018-11-28 2021-07-23 富士胶片株式会社 光学层叠膜辊的制造方法及光学层叠膜辊
CN113167955B (zh) * 2018-11-28 2023-02-21 富士胶片株式会社 光学层叠膜辊的制造方法及光学层叠膜辊

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