WO2011058904A1 - Élément optique, procédé de production, composite pour plaque polarisante et dispositif d'affichage à cristaux liquides - Google Patents

Élément optique, procédé de production, composite pour plaque polarisante et dispositif d'affichage à cristaux liquides Download PDF

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Publication number
WO2011058904A1
WO2011058904A1 PCT/JP2010/069469 JP2010069469W WO2011058904A1 WO 2011058904 A1 WO2011058904 A1 WO 2011058904A1 JP 2010069469 W JP2010069469 W JP 2010069469W WO 2011058904 A1 WO2011058904 A1 WO 2011058904A1
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Prior art keywords
film
layer
optical member
resin
group
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PCT/JP2010/069469
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English (en)
Japanese (ja)
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仁志 大石
川畑　耕也
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日本ゼオン株式会社
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Priority to JP2011540473A priority Critical patent/JP5655789B2/ja
Publication of WO2011058904A1 publication Critical patent/WO2011058904A1/fr

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    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • C09J7/22—Plastics; Metallised plastics
    • 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
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • C09J7/35—Heat-activated
    • 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
    • C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
    • C09J2203/318—Applications of adhesives in processes or use of adhesives in the form of films or foils for the production of liquid crystal displays
    • 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
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/40—Additional features of adhesives in the form of films or foils characterized by the presence of essential components
    • C09J2301/412—Additional features of adhesives in the form of films or foils characterized by the presence of essential components presence of microspheres
    • 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
    • C09J2433/00—Presence of (meth)acrylic polymer
    • 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
    • G02F1/133528—Polarisers
    • 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
    • G02F2202/00—Materials and properties
    • G02F2202/28—Adhesive materials or arrangements

Definitions

  • the present invention relates to an optical member, a manufacturing method, a polarizing plate composite, and a liquid crystal display device.
  • JP 2009-76463 A (corresponding foreign application: US Patent Application Publication No. 2009/162617)
  • each of the plurality of layers is a film having low rigidity, it is difficult to uniformly control the thickness of an adhesive layer for bonding them.
  • a so-called post-curing adhesive as the adhesive.
  • preparing a plurality of desired long films applying a post-curing adhesive to one or both of them, drying them, bonding the films together, and then curing such as active energy ray irradiation treatment
  • curing such as active energy ray irradiation treatment
  • bonding with a relatively uniform thickness of the adhesive layer is achieved.
  • the thickness of the dried adhesive layer is not uniform due to the pressure applied by the nip roll when the adhesive is applied, dried, and bonded by the nip roll in-line. It becomes.
  • An object of the present invention is an optical member having a plurality of film layers, which has uniform optical characteristics, is excellent in durability, and can be efficiently manufactured, and uses of the optical member and It is to provide an efficient manufacturing method.
  • the cured adhesive layer is a layer formed by curing an uncured layer of a post-cured adhesive,
  • the viscosity of the uncured layer is 50 mPa ⁇ s or more and 6000 mPa ⁇ s or less at a temperature of 20 ⁇ 1.0 ° C.
  • the film thickness X ( ⁇ m) of the uncured layer is 1.0 ⁇ m or more and 20.0 ⁇ m or less
  • the cured adhesive layer contains particles having an average particle size Y ( ⁇ m), where the average particle size Y is expressed by the formula (1): 0.6X ⁇ Y ⁇ 0.95X (1)
  • the optical member according to [1] which satisfies the relationship: [3]
  • the post-curing adhesive is (A) an oligomer-type polyfunctional (meth) acrylate having 3 or less functional groups per molecule, and (B) a viscosity at a temperature of 20 ⁇ 1.0 ° C.
  • [7] A method for producing an optical member according to any one of [1] to [6], (I) The post-curing adhesive is applied to the surface of the first film to be bonded, the surface of the second film to be bonded, or both, and a coating film of the post-curing adhesive is formed. , (II) drying the coating film to obtain an uncured layer of the post-curing adhesive; (III) Affix the first film and the second film so that the surfaces of the objects to be bonded face each other through the uncured layer, (IV) A manufacturing method including irradiating an active energy ray to the uncured layer to form a cured adhesive layer.
  • the step (III) The manufacturing method according to [7], including continuously pressing the first film, the uncured layer, and the second film with a nip roll.
  • a polarizing plate composite comprising a polarizing plate and the optical member according to any one of [1] to [6] provided on at least one surface of the polarizing plate.
  • a liquid crystal display device comprising the polarizing plate composite according to [9].
  • the optical member of the present invention and the polarizing plate composite having the optical member have uniform optical characteristics because the thickness of the cured adhesive layer is uniform, and have excellent durability because of the strong adhesion between the layers. Even if it is continuously manufactured as a member of the scale, these characteristics can be maintained, so that it can be manufactured efficiently.
  • the method for producing an optical member of the present invention can efficiently produce the optical member of the present invention.
  • FIG. 1 is a schematic view showing a sticking step in the production method of the present invention.
  • the optical member of the present invention is an optical member in which a first film, a cured adhesive layer, and a second film are laminated in this order.
  • the cured adhesive layer is a layer formed by curing an uncured layer of the post-cured adhesive.
  • the post-curing adhesive is applied to one or both of the two interfaces to be bonded, and if necessary, is dried appropriately to form an uncured layer of the adhesive, and then the uncured layer through the uncured layer.
  • the adhesive After bonding the two interfaces, the adhesive exhibits an adhesive ability by irradiating an uncured layer with active energy rays.
  • the adhesion ability means adhesion at the interface and cohesion of the adhesive layer itself.
  • active energy rays include ultraviolet rays, X-rays, and electron beams.
  • the post-curing adhesive is preferably one that is cured by ultraviolet rays or electron beams.
  • a layer formed by applying a liquid post-curing adhesive is simply referred to as an “coating film” of the adhesive, and the coating film is dried.
  • the layer of the adhesive that has undergone the process and has not been subjected to active energy ray irradiation is referred to as an “uncured layer”. It is called “agent layer”.
  • the viscosity of the uncured layer is 50 to 6000 mPa ⁇ s, preferably 60 to 4000 mPa ⁇ s at a temperature of 20 ⁇ 1.0 ° C. That is, when the uncured layer has a viscosity in the range of 50 to 6000 mPa ⁇ s at any temperature of 19.0 to 21.0 ° C., it can be used in the present invention.
  • the viscosity By setting the viscosity to 50 mPa ⁇ s or more, the uncured layer can be used for bonding.
  • practical performance as an adhesive can be imparted.
  • the film thickness X ( ⁇ m) of the uncured layer is 1.0 to 20.0 ⁇ m, and the cured adhesive layer contains particles having an average particle diameter Y ( ⁇ m), where the average particle diameter Y is Formula (1): 0.6X ⁇ Y ⁇ 0.95X (1) Satisfy the relationship.
  • the thickness of the cured adhesive layer in the optical member is made uniform. can do.
  • the unevenness of the optical characteristics of the optical member can be reduced, and the optical characteristics can be made uniform.
  • the adhesiveness of an interlayer can be improved and durability of an optical member can be improved.
  • the average particle diameter is the major axis, That is, the average value between particles having the longest diameter is defined as the average particle diameter.
  • the total solid content T and the particle content Z of the post-curing adhesive are the total solid content mass and the particle mass per unit area of the uncured layer.
  • the particle density d is the mass of the particles occupying the unit volume of the particles, and is a value obtained from the average particle diameter of the particles and the average mass per particle.
  • Examples of the material constituting the particles include acrylic resin, polyurethane, polyvinyl chloride, polystyrene resin, polyacrylonitrile, polyamide, polysiloxane resin, melamine resin, benzoguanamine resin, and the like as organic materials.
  • Examples of the inorganic material include silica, aluminum oxide, titanium oxide, zinc oxide, barium sulfate, magnesium silicate and the like. These can be used alone or as a mixture.
  • acrylic resin, polystyrene resin, polysiloxane resin, and fine particles composed of these cross-linked products can be preferably used in terms of high dispersibility, high heat resistance, and no coloring during molding.
  • the component of the post-curing adhesive other than the particles can be any component capable of expressing the performance as the post-curing adhesive, preferably, the post-curing adhesive is (A) Oligomer type polyfunctional (meth) acrylate (hereinafter sometimes referred to as “(meth) acrylate (A)”) having 3 or less functional groups per molecule, and (B) temperature 20 ⁇ 1.0 ° C.
  • the mono (meth) acrylate having a viscosity of 10 mPa ⁇ s or more and less than 500 mPa ⁇ s and having at least one hydroxyl group in one molecule hereinafter sometimes referred to as “(meth) acrylate (B)”). It is preferable to contain.
  • (meth) acrylate means acrylate and / or methacrylate.
  • the (meth) acrylate (A) preferably has 2 or 3 functional groups per molecule.
  • Specific examples of (meth) acrylate (A) include radical polymerizability such as polyester (meth) acrylate, epoxy (meth) acrylate, urethane (meth) acrylate, polyether (meth) acrylate, and silicone (meth) acrylate. Examples thereof include acrylic oligomers having various functional group numbers of 3 or less. These oligomers can be used alone or in a mixture of two or more.
  • the molecular weight of the acrylic oligomer as the (meth) acrylate (A) is preferably from 500 to 10,000 in terms of weight average molecular weight (Mw) in terms of polyisoprene measured by gel permeation chromatography. From the standpoint of expressing
  • the polyester (meth) acrylate is obtained by reacting a terminal hydroxyl group of a polyester obtained from a polybasic acid and a polyhydric alcohol with (meth) acrylic acid.
  • the polybasic acid include phthalic acid, adipic acid, maleic acid, itaconic acid, succinic acid, and terephthalic acid.
  • the polyhydric alcohol include ethylene glycol, 1,4-butanediol, 1,6-hexanediol, diethylene glycol, dipropylene glycol, polyethylene glycol, and polypropylene glycol.
  • polyester (meth) acrylate examples include, for example, EBECRYL 851,852,853,884,885 (manufactured by Daicel Cytec), Olester (manufactured by Mitsui Chemicals), and Aronix M-6100,6200,6250,6500 (Manufactured by Toagosei Co., Ltd.).
  • Epoxy (meth) acrylate is a reaction product obtained by ring-opening addition reaction of (meth) acrylic acid to an epoxy resin.
  • the epoxy resin include bisphenol A type composed of bisphenol A and epichlorohydrin, novolac type composed of phenol novolac and epichlorohydrin, aliphatic type, and alicyclic type.
  • Aliphatic epoxy resins include ethylene glycol diglycidyl ether, tripropylene glycol diglycidyl ether, neopentyl glycol diglycidyl ether, 1,4-butanediol diglycidyl ether, 1,6-hexanediol diglycidyl ether, trimethylol Propane diglycidyl ether, polyethylene glycol diglycidyl ether, and the like can be used, and unsaturated fatty acid epoxy resins such as butadiene-based epoxy resins and isoprene-based epoxy resins can also be used.
  • Alicyclic epoxy resins include vinylcyclohexene monooxide, 1,2-epoxy-4-vinylcyclohexane, 1,2: 8,9-diepoxysilimonene, 3,4-epoxycyclohexenylmethyl-3 ′, 4 ′.
  • -Epoxycyclohexenecarboxylate and the like can be used.
  • epoxy (meth) acrylate examples include, for example, EBECRYL600, 860, 3105, 3420, 3700, 3701, 3702, 3703, 3708, 6040 (manufactured by Daicel Cytec), Neopole 8101, 8250, 8260, 8270, 8355, 8351, 8335, 8414, 8190, 8195, 8316, 8317, 8318, 8319, 8371 (manufactured by Nippon Iupika), Denacol acrylate DA212, 250, 314, 721, 722, DM201 (manufactured by Nagase ChemteX), Van Beam ( Harima Chemicals) and Miramer PE210, PE230, EA2280 (Toyo Chemicals).
  • EBECRYL600 860, 3105, 3420, 3700, 3701, 3702, 3703, 3708, 6040
  • Urethane (meth) acrylate is a reaction product having a urethane skeleton at the center, obtained by the reaction of a (meth) acrylic monomer having a hydroxyl group, a polyfunctional isocyanate and a polyhydric alcohol.
  • examples of the (meth) acrylic monomer having a hydroxyl group include 2-hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, and hydroxybutyl (meth) acrylate.
  • polyfunctional isocyanate examples include tolylene diisocyanate, hexamethylene diisocyanate, tetramethylene diisocyanate, trimethylolpropane tolylene diisocyanate, and diphenylmethane triisocyanate. Among them, hexamethylene diisocyanate having good weather resistance is preferably used. As a polyhydric alcohol, what can be used for polyester (meth) acrylate can be used.
  • urethane (meth) acrylate examples include, for example, EBECRYL 204, 210, 220, 230, 270, 4858, 8200, 8201, 8402, 8804, 8807, 9260, 9270, KRM 8098, 7735, 8296 (manufactured by Daicel Cytec) , UX2201, 2301, 3204, 3301, 4101, 6101, 7101, 8101, 0937 (manufactured by Nippon Kayaku Co., Ltd.), UV6640B, 6100B, 3700B, 3500BA, 3520TL, 3200B, 3000B, 3310B, 3210EA, 7000B, 6630B, 7461TE ( (Manufactured by Nippon Synthetic Chemical Co., Ltd.), Iupica 8921, 8932, 8940, 8936, 8937, 8980, 8975, 8976 (manufactured by Nippon Iupika
  • Polyether (meth) acrylate is a reaction product of polyether polyol and (meth) acrylic acid. Examples thereof include ethoxylated trimethylolpropane triacrylate, propoxylated trimethylolpropane triacrylate, and EBECRYL81 (manufactured by Daicel Cytec).
  • polyester (meth) acrylate, epoxy (meth) acrylate, and urethane (meth) acrylate are preferred.
  • the number of functional groups per molecule is 3 or less, curing shrinkage when the uncured layer is cured with active energy rays to form a cured adhesive layer can be reduced, and the glass transition temperature of the cured adhesive layer can be lowered. And the adhesiveness between the first film and the second film can be maintained well.
  • the content of (meth) acrylate (A) in the post-curing adhesive is 10 to 60% by weight based on the total solid content, and exhibits adhesive strength. This is preferable because the force can be maintained well.
  • (meth) acrylate (B) Specific examples include 2-hydroxypropyl acrylate (10.9 mPa ⁇ s), 4-hydroxybutyl acrylate (17 mPa ⁇ s), 2-hydroxy-3-phenoxypropyl acrylate (373 mPa ⁇ s).
  • Glycerin monomethacrylate Blenmer GLM (150 mPa ⁇ s, manufactured by NOF Corporation), polyethylene glycol monomethacrylate: BREMMER PE-90 (15 mPa ⁇ s, manufactured by NOF Corporation), PE-200 (30 mPa ⁇ s, manufactured by NOF Corporation) Manufactured), PE-350 (45 mPa ⁇ s, manufactured by NOF Corporation), polypropylene glycol monomethacrylate: BLEMMER PP-1000 (50 mPa ⁇ s, manufactured by NOF Corporation), PP-500 (75 mPa ⁇ s, manufactured by NOF Corporation) , Poly (ethylene propylene glycol) monometa Relate: Blemmer 50 PEP-300 (55 mPa ⁇ s, manufactured by NOF Corporation), polyethylene glycol / polypropylene glycol monomethacrylate: BREMMER 70PEP-350B (79 mPa ⁇ s, manufactured by NOF Corporation),
  • the viscosity of the uncured layer can be 50 to 6000 mPa ⁇ s at the temperature of 20 ⁇ 1.0 ° C., and the cured adhesive layer has stronger adhesive strength. Is preferable.
  • the viscosity range is more preferably 50 mPa ⁇ s to 400 mPa ⁇ s, and still more preferably 70 to 350 mPa ⁇ s.
  • the content ratio of (meth) acrylate (B) in the post-curing adhesive is preferably 5 to 65% by weight in the total solid content of the post-curing adhesive. By being within this range, a stronger adhesive force can be obtained.
  • the cured adhesive layer can contain metal oxide fine particles having an average particle size of less than Y in addition to the particles.
  • the refractive index of the resin components ((meth) acrylates (A) and (B) etc.) around the particles can be adjusted so as to approach the refractive index of the particles, and the cured adhesive layer Diffusion of light that passes through can be reduced.
  • the performance as an optical member can be improved.
  • the metal oxide fine particles a slurry in which metal oxide nanoparticles of several nm to several hundred nm are dispersed in a solvent can be used.
  • metal oxide examples include silica, aluminum hydroxide, aluminum oxide, titanium oxide, zinc oxide, acid value zirconium, antimony pentoxide, barium sulfate, magnesium silicate, and a mixture thereof.
  • Organosilica Sol Methanol Silica Sol IPA-ST, IPA-ST-UP, IPA-ST-ZL, EG-ST, NPC-ST-30, DMAC-ST, MEK-ST, MIBK-ST, XBA -ST, PMA-ST, PGM-ST, PL-1-IPA, PL-1-TOL, PL-2L-PGME, and PL-2L-MEK manufactured by Fuso Chemical.
  • the content is preferably 10 to 60% by weight as the solid content of metal oxide fine particles in the total solid content of the post-cured adhesive. By setting it as the above range, the haze value of the optical member can be suppressed to 5 or less.
  • the post-curing adhesive can contain a solvent.
  • the solvent may be volatilized in the step of drying the coating film, but a part of the solvent may remain in the uncured layer and the cured adhesive layer after the drying step.
  • Solvents include ketones such as methyl ethyl ketone and methyl isobutyl ketone, esters such as ethyl acetate and butyl acetate, aliphatic hydrocarbons such as n-hexane and n-heptane, aromatic hydrocarbons such as toluene and xylene, Organic solvents such as alcohols such as methanol, ethanol, isopropyl alcohol, n-propanol, n-butanol and isobutanol, and glycols such as ethylene glycol, ethylene glycol monobutyl ether and ethyl acetate monoethyl ether can be preferably used. .
  • the post-curing adhesive is a polymerization initiator, a crosslinking agent, an inorganic filler, a polymerization inhibitor, a color pigment, a dye, an antifoaming agent, a leveling agent, a dispersing agent, a light as long as the effects of the present invention are not impaired as necessary. It is also possible to include optional components such as a diffusing agent, a plasticizer, an antistatic agent, a surfactant, a non-reactive polymer (inert polymer), a viscosity modifier, and a near-infrared absorbing material.
  • the polymerization initiator can be appropriately selected according to the type of active energy ray.
  • the post-curing adhesive When the post-curing adhesive is cured by photocuring, it can contain one or more photopolymerization initiators. Moreover, a photosensitizer can be used arbitrarily.
  • Photopolymerization initiators include 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-2-methyl-1-phenyl-propan-1-one, 1- (4-isopropylphenyl) -2-hydroxy-2-methylpropane- 1-one, thioxanthone, 2-chlorothioxanthone, 2-methylthioxanthone, 2,4-diethylthioxanthone, methylbenzoyl formate, 2,2-diethoxyacetophenone, ⁇ -ionone, ⁇ -bromostyrene, diazoaminobenzene, ⁇ -Amylcinnaldehyde, p-dimethylaminoacetophenone, p-dimethylaminopropiophenone, 2-chlorobenzophenone, p, p'-dichlorobenzophenone, p, p'-bisdiethylaminobenzophenone, benzoin ethyl ether, be
  • the addition amount of the photopolymerization initiator is preferably 0.5 to 10% by weight and more preferably 1 to 5% by weight in the total solid content of the post-curing adhesive.
  • n-butylamine, triethylamine, poly-n-butylphosphine or the like can be added as a photosensitizer to control curability.
  • the defoaming agent BYK051,052,055,057,1790,065,070,088,354,392 manufactured by Big Chemie Japan, LR-20R, OP-80R, OP-83RAT, OP-85R manufactured by NOF Corporation , PP-40R, SO-80R, SP-60R, BP-70R, CP-08R, DS-60HN, and the like.
  • the antifoaming agent can be added to such an extent that the adhesive strength of the adhesive layer does not decrease.
  • the addition amount of the antifoaming agent is preferably 0.1 to 1.0% by weight, more preferably 0.1 to 0.5% by weight, based on the total solid content of the post-curing adhesive.
  • a (meth) acrylate monomer having a molecular weight of less than 500 and having 2 or more functional groups per molecule can be mixed.
  • the addition amount of the crosslinking agent is preferably 0.5 to 10% by weight, more preferably 1 to 5% by weight, based on the total solid content of the post-curing adhesive. Mixing 10% by weight or more is not preferable because the adhesive layer is excessively cured and the adhesive force for bonding the first film and the second film may be reduced. If it is 0.5% by weight or less, the effect of the crosslinking agent may not be exhibited, which is not preferable.
  • the viscosity of the post-curing adhesive is also adjusted by the addition amount of the metal oxide fine particles described above, but the post-curing adhesive may contain a viscosity modifier in addition to or instead of it.
  • the viscosity modifier include glycol distearate, stearyl stearate, glycol dilaurate, glycol dioleate, propylene glycol diisostearate, propylene glycol dilaurate, propylene glycol dioleate, propylene glycol distearate, and the like.
  • the content of the viscosity modifier can be added in such a range that the viscosity of the uncured layer is in the range of 50 to 6000 mPa ⁇ s at a temperature of 20 ⁇ 1.0 ° C. and no decrease in the adhesive strength is observed.
  • the light diffusing agent is a particle having a property of diffusing light, and can be roughly classified into an inorganic filler and an organic filler.
  • the inorganic filler include glass, silica, aluminum hydroxide, aluminum oxide, titanium oxide, zinc oxide, barium sulfate, magnesium silicate, and mixtures thereof.
  • the organic filler examples include acrylic resin, polyurethane resin, polyvinyl chloride resin, polystyrene resin, polyacrylonitrile resin, polyamide resin, polysiloxane resin, melamine resin, benzoguanamine resin, fluorine resin, polycarbonate resin, silicone resin, polyethylene resin, Examples thereof include an ethylene-vinyl acetate copolymer, acrylonitrile, and a cross-linked product thereof.
  • an acrylic resin, a polystyrene resin, a polysiloxane resin, and fine particles made of a crosslinked product thereof are preferable in terms of high dispersibility, high heat resistance, and no coloration (yellowing) during molding. .
  • fine particles made of a crosslinked product of an acrylic resin are more preferable in terms of more excellent transparency.
  • what consists of 2 or more types of raw materials as a light-diffusion agent may be used, and 2 or more types of light-diffusion agents may be mixed and used.
  • the addition amount of the light diffusing agent is preferably 0.5 to 20% by weight in the total solid content of the post-curing adhesive.
  • the addition amount of the light diffusing agent can be determined according to the desired haze value and the film thickness of the adhesive layer.
  • the inactive polymer is a polymer that is inactive with respect to polymerization and curing, that is, a polymer that is not cured by active energy rays irradiated to the uncured layer when the uncured layer is cured.
  • an inert polymer is added. be able to.
  • the glass transition temperature of the inert polymer is preferably from ⁇ 10 ° C. to 80 ° C., and more preferably from ⁇ 5 ° C. to 50 ° C. By setting this glass transition temperature, the adhesive force of the post-curing adhesive layer can be maintained.
  • the inert polymer examples include urethane resin, methyl methacrylate polymer, styrene polymer, polyacrylonitrile, polyvinyl chloride, polyvinyl acetate, polyester, polycarbonate resin, triacetyl cellulose resin, and butyral resin.
  • examples thereof include a random copolymer obtained by copolymerizing at least species, a block copolymer, a graft copolymer obtained by grafting a molecule having a carboxylic acid, a sulfonic acid, an ester thereof, a hydroxyl group or a mercapto group in the side chain.
  • the addition amount of the inert polymer is preferably 10 to 60% by weight, more preferably 20 to 50% by weight, based on the total solid content of the post-curing adhesive. If it is less than 10% by weight, the relaxation of curing shrinkage becomes insufficient and warpage occurs in the optical member. When the amount is more than 60% by weight, the viscosity of the uncured layer exceeds the range of 50 to 6000 mPa ⁇ s at a temperature of 20 ⁇ 1.0 ° C., and a decrease in adhesive strength is observed.
  • the 1st film and 2nd film which the optical member of this invention has can be made into the arbitrary films which have a desired characteristic, when setting it as an optical member.
  • a film composed of a resin layer having cholesteric regularity hereinafter referred to simply as “cholesteric resin layer”
  • cholesteric resin layer a resin layer having cholesteric regularity
  • having a cholesteric resin layer a laminated film having a cholesteric resin layer
  • the combination of (A) and (B) above, the combination of (C) and (D) above, and (B) and (B) D) can be mentioned.
  • the cholesteric resin layer is formed by providing a coating film of a cholesteric liquid crystal composition on a substrate for resin layer formation, and curing the coating film. It is a resin layer.
  • Cholesteric regularity means that the molecular axes are aligned in a certain direction on one plane, but the direction of the molecular axis is slightly shifted on the next plane, and the angle is further shifted on the next plane. This is a structure in which the angle of the molecular axis is shifted (twisted) as it advances through a plane in which molecules are arranged in a certain direction.
  • the axes of molecules at a certain level are aligned along a certain direction.
  • the angle of the direction of the axis of the molecule with respect to the direction of the axis of the molecule at the lowest level increases as the height of the level increases. Therefore, when the cholesteric resin layer is observed from the lowest position to the highest position, the molecular axis rotates in the horizontal plane.
  • the structure in which the direction of the molecular axis is twisted becomes an optically chiral structure.
  • the film having a cholesteric resin layer preferably includes a cholesteric resin layer that exhibits this circularly polarized light separation function over the entire wavelength region of visible light.
  • the cholesteric resin layer can be obtained, for example, by polymerizing a cholesteric liquid crystal composition (X) containing a polymerizable liquid crystal compound in a curing process described later. Such a layer becomes a non-liquid crystalline resin layer cured while exhibiting the molecular orientation of the liquid crystalline compound.
  • a liquid crystal composition here for convenience includes not only a mixture of two or more substances but also a material made of a single substance.
  • the cholesteric liquid crystal composition (X) contains a compound represented by the following general formula (1) and a rod-like liquid crystal compound as a polymerizable liquid crystal compound.
  • R 1X and R 2X each independently represent a linear or branched alkyl group having 1 to 20 carbon atoms, or a linear or branched chain having 1 to 20 carbon atoms. And a group selected from the group consisting of a hydrogen atom, a halogen atom, a hydroxyl group, a carboxyl group, a (meth) acryl group, an epoxy group, a mercapto group, an isocyanate group, an amino group, and a cyano group.
  • (meth) acryl means acryl and methacryl.
  • the alkyl group and alkylene oxide group may be unsubstituted or substituted with one or more halogen atoms.
  • the halogen atom, hydroxyl group, carboxyl group, (meth) acryl group, epoxy group, mercapto group, isocyanate group, amino group, and cyano group are bonded to an alkyl group having 1 to 2 carbon atoms or an alkylene oxide group. May be.
  • R 1X and R 2X include a halogen atom, a hydroxyl group, a carboxyl group, a (meth) acryl group, an epoxy group, a mercapto group, an isocyanate group, an amino group, and a cyano group.
  • R 1X and R 2X are a reactive group.
  • the compound represented by the general formula (1) is fixed in the liquid crystal composition layer at the time of curing, and a stronger film can be formed.
  • the reactive group include a carboxyl group, a (meth) acryl group, an epoxy group, a mercapto group, an isocyanate group, and an amino group.
  • a 1X and A 2X are each independently 1,4-phenylene group, 1,4-cyclohexylene group, 1,4-cyclohexenyl group, 4,4′-biphenylene group, 4, A group selected from the group consisting of a 4′-bicyclohexylene group and a 2,6-naphthylene group.
  • the 1,4-phenylene group, 1,4-cyclohexylene group, 1,4-cyclohexenyl group, 4,4′-biphenylene group, 4,4′-bicyclohexylene group, and 2,6-naphthylene group are , It may be unsubstituted or substituted with one or more halogen atoms, hydroxyl groups, carboxyl groups, cyano groups, amino groups, alkyl groups having 1 to 10 carbon atoms, or halogenated alkyl groups. In each of A 1X and A 2X , when two or more substituents are present, they may be the same or different.
  • a 1X and A 2X include groups selected from the group consisting of 1,4-phenylene group, 4,4′-biphenylene group, and 2,6-naphthylene group.
  • aromatic ring skeletons are relatively rigid as compared with the alicyclic skeletons, have high affinity with the mesogens of rod-like liquid crystalline compounds described later, and have higher alignment uniformity.
  • Z include a single bond, —OCO—, and —CH ⁇ N—N ⁇ CH—.
  • At least one compound of the general formula (1) preferably has liquid crystallinity, and preferably has chirality.
  • the cholesteric liquid crystal composition (X) preferably contains a mixture of a plurality of optical isomers as the compound of the general formula (1). For example, a mixture of plural kinds of enantiomers and / or diastereomers can be contained.
  • At least one of the compounds of the general formula (1) preferably has a melting point in the range of 50 ° C to 150 ° C.
  • the compound of the general formula (1) When the compound of the general formula (1) has liquid crystallinity, it is preferably high ⁇ n. By selecting a material having a high ⁇ n, it is possible to prevent the effect of ⁇ n of the liquid crystal compound from being inhibited. At least one ⁇ n of the compound of the general formula (1) is preferably 0.20 or more, more preferably 0.22 or more. However, when ⁇ n increases, the required cholesteric resin layer tends to have a significantly reduced thickness. Therefore, if ⁇ n exceeds 0.4, the thickness may be less than 1 ⁇ m. If the thickness is less than 1 ⁇ m, the optical characteristics are sensitively influenced by variations in film thickness, which tends to make manufacture difficult. Therefore, in such a case, the upper limit of ⁇ n is preferably set to 0.4.
  • Particular preferred compounds of the general formula (1) include the following compounds (A1) to (A9):
  • the cholesteric liquid crystal composition (X) preferably contains a rod-like liquid crystal compound having at least two or more reactive groups in one molecule.
  • Examples of the rod-like liquid crystalline compound include compounds represented by the general formula (2). R 3X -C 3X -D 3X -C 5X -MC 6X -D 4X -C 4X -R 4X Formula (2)
  • R 3X and R 4X are reactive groups, each independently (meth) acryl group, (thio) epoxy group, oxetane group, thietanyl group, aziridinyl group, pyrrole group, vinyl group, It represents a group selected from the group consisting of an allyl group, a fumarate group, a cinnamoyl group, an oxazoline group, a mercapto group, an iso (thio) cyanate group, an amino group, a hydroxyl group, a carboxyl group, and an alkoxysilyl group.
  • D 3X and D 4X are a single bond, a divalent saturated hydrocarbon group such as a linear or branched methylene group and alkylene group having 1 to 20 carbon atoms, and a carbon atom.
  • C 3X to C 6X are a single bond, —O—, —S—, —SS—, —CO—, —CS—, —OCO—, —CH 2 —, —OCH 2.
  • M represents a mesogenic group, specifically, azomethines, azoxys, phenyls, biphenyls, terphenyls, naphthalenes, which may be unsubstituted or substituted.
  • Anthracenes benzoic acid esters, cyclohexanecarboxylic acid phenyl esters, cyanophenylcyclohexanes, cyano-substituted phenylpyrimidines, alkoxy-substituted phenylpyrimidines, phenyldioxanes, tolanes, alkenylcyclohexylbenzonitriles
  • Two to four skeletons are represented by —O—, —S—, —SS—, —CO—, —CS—, —OCO—, —CH 2 —, —OCH 2 —, —CH ⁇ N—.
  • N CH -, - NHCO - , - OCOO -, - CH 2 COO-, and coupled by a linking group of -CH 2 OCO-, etc. Is a group formed by.
  • the rod-like liquid crystalline compound preferably has an asymmetric structure.
  • the asymmetric structure is a structure in which R 3X -C 3X -D 3X -C 5X -and -C 6X -D 4X -C 4X -R 4X are different in the general formula (2) with the mesogenic group M as the center. That means.
  • the rod-like liquid crystalline compound may have at least two reactive groups in one molecule.
  • the reactive group include an epoxy group, a thioepoxy group, an oxetane group, a thietanyl group, an aziridinyl group, a pyrrole group, a fumarate group, a cinnamoyl group, an isocyanate group, an isothiocyanate group, an amino group, a hydroxyl group, and a carboxyl group.
  • the weight ratio of (total weight of the compound of the general formula (1)) / (total weight of the rod-like liquid crystal compound) is preferably 0.05 to 1. It is more preferably 1 to 0.65, and further preferably 0.15 to 0.45. If the weight ratio is less than 0.05, the alignment uniformity may be insufficient. On the other hand, if it is more than 1, the alignment uniformity is lowered, the stability of the liquid crystal phase is lowered, or ⁇ n as the liquid crystal composition is lowered, so that desired optical performance (for example, circularly polarized light separation characteristics) cannot be obtained. There is a case.
  • the total weight indicates the weight when one kind is used and the total weight when two or more kinds are used.
  • the cholesteric liquid crystal composition can optionally contain a chiral agent.
  • a specific chiral agent the compounds represented by the following (C1) and (C2) having an isosorbide skeleton in which the chiral group is divalent can be used.
  • LC756 of BASF Corporation Paliocolor can be obtained.
  • the chiral agent can be included in a range that does not deteriorate the desired optical performance.
  • the content ratio of the chiral agent is usually 1 to 60% by weight in the cholesteric liquid crystal composition.
  • the cholesteric liquid crystal composition can further contain other optional components as necessary.
  • the other optional components include solvents, photopolymerization initiators, surfactants, crosslinking agents, polymerization inhibitors for improving pot life, antioxidants for improving durability, ultraviolet absorbers, and light stability. And the like. These optional components can be included in a range that does not deteriorate the desired optical performance.
  • the method for producing the cholesteric liquid crystal composition is not particularly limited, and can be produced by mixing the above components.
  • Examples of the method for producing the cholesteric resin layer include the following methods.
  • the cholesteric liquid crystal composition is applied onto the base material layer directly or through an alignment film to obtain a coating film, and then subjected to one or more light irradiation and / or heating treatments to cure the coating film. As a result, a cholesteric resin layer can be obtained.
  • a transparent resin substrate can be preferably used.
  • alicyclic olefin polymers or chain olefin polymers are preferable, and alicyclic olefin polymers are particularly preferable from the viewpoints of transparency, low hygroscopicity, dimensional stability, lightness, and the like.
  • An alignment film can be provided on the base material layer as necessary.
  • the cholesteric liquid crystal composition applied thereon can be aligned in a desired direction.
  • the alignment film is subjected to a corona discharge treatment, if necessary, on the surface of the base material layer, and then applied with a solution obtained by dissolving the alignment film material in water or a solvent, and then dried as necessary. It can form by giving a rubbing process to a dry coating film.
  • the material for the alignment film is preferably a modified polyamide from the viewpoint of durability and the like.
  • polyvinyl alcohol is particularly preferable from the viewpoint of ease of transfer when the cholesteric resin layer is peeled off from the substrate after the formation of the cholesteric resin layer.
  • the application method may be a known method such as reverse gravure coating, direct gravure coating, die coating, or bar coating.
  • modified polyamide include those obtained by modifying an aromatic polyamide or an aliphatic polyamide, and those obtained by modifying an aliphatic polyamide are preferred.
  • an orientation treatment may be performed as necessary.
  • the orientation treatment is performed, for example, by heating the coating film at 50 to 150 ° C. for 0.5 to 10 minutes.
  • a substance capable of exhibiting a cholesteric liquid crystal phase in the coating film can be well aligned.
  • the curing step is performed by, for example, one or more times of light irradiation, heating treatment, or a combination thereof.
  • the heating conditions are, for example, a temperature of 40 to 200 ° C., preferably 50 to 200 ° C., more preferably 50 to 140 ° C., and a time of 1 second to 3 minutes, preferably 5 to 120 seconds.
  • the light used for light irradiation includes not only visible light but also ultraviolet rays and other electromagnetic waves.
  • the light irradiation can be performed, for example, by irradiating light having a wavelength of 200 to 500 nm for 0.01 second to 3 minutes.
  • a weakly irradiated ultraviolet ray of 0.01 to 50 mJ / cm 2 and heating may be alternately repeated a plurality of times to obtain a circularly polarized light separating element having a wide reflection band.
  • a relatively strong ultraviolet ray of 50 to 10,000 mJ / cm 2 is irradiated to completely polymerize the liquid crystalline compound to form a cholesteric resin layer. It can.
  • the expansion of the reflection band and the irradiation with strong ultraviolet rays may be performed in the air, or a part or all of the process may be performed in an atmosphere in which the oxygen concentration is controlled (for example, in a nitrogen atmosphere). .
  • the dry film thickness of the cholesteric resin layer is preferably 10 ⁇ m or less, more preferably 2 to 7 ⁇ m, and even more preferably 3 to 6 ⁇ m. By changing the film thickness to 10 ⁇ m or less, a change in hue when observed from an oblique direction can be reduced. On the other hand, by setting the film thickness to 2 ⁇ m or more, sufficient reflectance can be obtained.
  • the dry film thickness refers to the total film thickness of each layer when the cholesteric resin layer is two or more layers, and the film thickness when the cholesteric resin layer is one layer.
  • the laminate having the substrate and the cholesteric resin layer can be used as it is as the first or second film, but the cholesteric resin layer is peeled from the substrate and only the cholesteric resin layer is removed from the first or second film. It can also be used as a film. Or you may use what stuck the other layer after formation of a cholesteric resin layer as a 1st or 2nd film. Furthermore, you may peel a base material layer, after sticking a 1st film and a 2nd film so that a base material layer may become an outermost layer.
  • the total thickness thereof can be 30 ⁇ m to 500 ⁇ m.
  • the stretched film made of a transparent resin is a stretched film obtained by stretching a film-like transparent resin.
  • Preferred examples of the stretched film made of a transparent resin include a film having optical anisotropy expressed by such stretching and functioning as an optically anisotropic film such as a quarter-wave plate.
  • the transparent resin may be, for example, a 1 mm thick plate with a total light transmittance of 80% or more.
  • examples thereof include polymethyl methacrylate, polystyrene, polyethylene terephthalate, polybutylene terephthalate, polycarbonate, polyether sulfone, amorphous polyethylene, triacetyl cellulose, and a resin having an alicyclic structure.
  • the transparent resin suitable for constituting the quarter wavelength plate include a resin containing a styrene resin layer and a resin having an alicyclic structure.
  • More preferable transparent resins include styrene resins.
  • the styrene resin is a polymer resin having a styrene structure as a part or all of the repeating units, and a polystyrene or a copolymer of styrene and maleic anhydride can be preferably used.
  • the molecular weight of the styrenic resin is appropriately selected according to the purpose of use, and is a weight average molecular weight (Mw) of polyisoprene measured by gel permeation chromatography using cyclohexane as a solvent, and is usually 10,000 to 300. , Preferably 15,000 to 250,000, more preferably 20,000 to 200,000.
  • the stretched film made of a transparent resin preferably has a laminated structure of a layer made of the styrene resin and a layer containing another thermoplastic resin.
  • a laminated structure By having the laminated structure, it is possible to provide an element that has both the optical characteristics of the styrene resin and the mechanical strength of other thermoplastic resins.
  • the other thermoplastic resin a resin having an alicyclic structure or a methacrylic resin can be suitably used.
  • Examples of the resin having an alicyclic structure include alicyclic olefin polymers.
  • the alicyclic olefin polymer is an amorphous olefin polymer having a cycloalkane structure or a cycloalkene structure in the main chain and / or side chain.
  • the methacrylic resin is a polymer mainly composed of a methacrylic acid ester, and examples thereof include a homopolymer of methacrylic acid ester and a copolymer of methacrylic acid ester and other monomers.
  • methacrylic acid ester alkyl methacrylate is usually used.
  • acrylic acid esters, aromatic vinyl compounds, vinylcyan compounds, etc. are used as other monomers copolymerized with methacrylic acid esters.
  • the thickness of the stretched film made of a transparent resin can be 5 ⁇ m to 500 ⁇ m.
  • a transparent resin for the unstretched film made of a transparent resin As the transparent resin for the unstretched film made of a transparent resin, a transparent resin having a thickness of 1 mm and a total light transmittance of 80% or more can be used as in the case of the stretched film made of a transparent resin.
  • Transparent resins suitable for unstretched films made of transparent resins include, for example, resins having an alicyclic structure, polyester resins, cellulose resins, polycarbonate resins, polysulfone resins, polyethersulfone resins, polystyrene resins, polyolefin resins, and polyvinyl resins. Alcohol resin, polyvinyl chloride resin, polymethyl methacrylate resin, etc. are mentioned.
  • the transparent resin may contain a compounding agent other than the polymer in addition to the polymer constituting the resin.
  • the compounding agent is not particularly limited, but inorganic fine particles; antioxidants, heat stabilizers, light stabilizers, weathering stabilizers, UV absorbers, near infrared absorbers and other stabilizers; resins such as lubricants and plasticizers Modifiers; coloring agents such as dyes and pigments; antistatic agents and the like.
  • These compounding agents can be used alone or in combination of two or more, and the compounding amount is appropriately selected within a range not impairing the object of the present invention, and is added to 100 parts by weight of the polymer as the main raw material of the transparent resin. On the other hand, it is usually 0 to 5 parts by weight, preferably 0 to 3 parts by weight.
  • the unstretched film made of a transparent resin may be a single layer or a laminate composed of a plurality of layers.
  • the thickness of the unstretched film made of a transparent resin is particularly preferably 20 to 300 ⁇ m.
  • the unstretched film made of a transparent resin may have a surface-modified treatment on the surface thereof.
  • the surface modification treatment include energy beam irradiation treatment and chemical treatment.
  • the energy ray irradiation treatment include corona discharge treatment, plasma treatment, electron beam irradiation treatment, ultraviolet ray irradiation treatment, and the like. From the viewpoint of treatment efficiency, corona discharge treatment and plasma treatment are preferable.
  • the chemical treatment include a method of immersing in an aqueous solution of an oxidizing agent such as potassium dichromate solution or concentrated sulfuric acid and then thoroughly washing with water. It is effective to shake in the immersed state, but there is a problem that the surface will dissolve or the transparency will be lowered if treated for a long time. Depending on the reactivity and concentration of the chemical used, the treatment time etc. It needs to be adjusted.
  • the haze is preferably 30 to 5%, and more preferably 25 to 10%.
  • the transparency when the antireflection film is obtained is lowered, and when the haze is lower than this, interference unevenness tends to occur when the antireflection film is used, which is not preferable.
  • the film having a hard coat layer can be preferably a laminate having a base film and a hard coat layer provided thereon.
  • a stretched film made of the transparent resin or an unstretched film can be used.
  • a base film in a film having a hard coat layer it is preferable to use a biaxially stretched polyethylene terephthalate film in terms of transparency, high heat resistance, and ease of handling.
  • the hard coat layer is preferably a layer exhibiting a hardness of “2H” or more in a pencil hardness test shown in JIS K5600-5-4 (the test is measured with the test sample placed on a glass plate).
  • the average thickness of the hard coat layer is usually 0.3 to 20 ⁇ m, preferably 0.8 to 10 ⁇ m, more preferably 1.0 to 3 ⁇ m.
  • an inorganic material, a synthetic resin, or a mixture thereof can be used, but a resin material is preferable from the viewpoint of excellent productivity.
  • a resin material is preferable from the viewpoint of excellent productivity.
  • the synthetic resin what has sufficient intensity
  • the synthetic resin include a thermosetting resin, a thermoplastic resin, and an ionizing radiation curable resin, and a thermosetting resin or an ionizing radiation curable resin is preferable from the viewpoint of the strength and workability of the film.
  • Thermosetting resins include phenolic resin, urea resin, diallyl phthalate resin, melamine resin, guanamine resin, unsaturated polyester resin, polyurethane resin, epoxy resin, aminoalkyd resin, melamine-urea cocondensation resin, silicone resin, polysiloxane Resin.
  • these thermosetting resins contain, as necessary, fine particles similar to those that can be contained in an unstretched film made of a solvent, a catalyst, and a transparent resin. Also good.
  • the ionizing radiation curable resin is a resin in which a prepolymer, oligomer or monomer having a polymerizable unsaturated bond or epoxy group in the molecule is cured by irradiation with ionizing radiation.
  • Ionizing radiation refers to electromagnetic waves or charged particle beams having energy quanta that can polymerize or crosslink molecules, and usually use ultraviolet rays.
  • Examples of the ultraviolet curable resin include a photopolymerizable prepolymer or a photopolymerizable monomer and a photopolymerization initiator or a photosensitizer, and examples of the electron beam curable resin include a photopolymerizable prepolymer or a photopolymer. The thing containing a polymerizable monomer is mentioned.
  • Examples of the photopolymerizable prepolymer include polyester acrylate, epoxy acrylate, urethane acrylate, and polyol acrylate. These photopolymerizable prepolymers may be used alone or in combination of two or more.
  • Examples of the photopolymerizable monomer include polymethylolpropane triacrylate, polymethylolpropane trimethacrylate, hexanediol acrylate, hexanediol methacrylate, tripropylene glycol diacrylate, tripropylene glycol dimethacrylate, diethylene glycol diacrylate, diethylene glycol dimethacrylate, Pentaerythritol triacrylate, pentaerythritol trimethacrylate, dipentaerythritol hexaacrylate, dipentaerythritol hexamethacrylate, 1,6-hexanediol diacrylate, 1,6-hexanedi
  • urethane acrylate as the prepolymer and dipentaerythritol hexaacrylate or dipentaerythritol hexamethacrylate as the monomer.
  • photopolymerization initiator examples include acetophenones, benzophenones, ⁇ -amyloxime esters, tetramethylchuram monosulfide, thioxanthones, and the like.
  • photosensitizer n-butylamine, triethylamine, poly-n-butylphosphine and the like can be used alone or in combination.
  • the hard coat layer preferably contains conductive fine particles.
  • the hard coat layer contains conductive fine particles, not only a function as a hard coat layer but also a function as an antistatic layer can be imparted.
  • the conductive fine particles are not particularly limited as long as they are conductive fine particles, but metal oxide fine particles are preferable because of excellent transparency.
  • Examples of the metal oxide constituting the conductive metal oxide fine particles include antimony pentoxide, tin oxide, tin oxide doped with phosphorus (PTO), tin oxide doped with antimony (ATO), and tin doped. Indium oxide (ITO), zinc doped indium oxide (IZO), aluminum doped zinc oxide (AZO), fluorine doped tin oxide (FTO), zinc oxide / aluminum oxide, zinc antimonate Etc. These metal oxide fine particles can be used singly or in combination of two or more. Among these, at least one selected from antimony pentoxide fine particles and tin oxide fine particles doped with phosphorus is preferable because of excellent transparency.
  • fine particles imparted with conductivity by coating conductive metal oxide on non-conductive metal oxide fine particles can also be used as conductive metal oxide fine particles.
  • the surface of fine particles of titanium oxide, zirconium oxide, cerium oxide or the like having a high refractive index but no conductivity can be used by coating the conductive metal oxide to impart conductivity.
  • the metal oxide particle which does not have electroconductivity, and electroconductive metal oxide fine particle can also be used together.
  • the number average particle diameter of the conductive fine particles is preferably 200 nm or less, more preferably 50 to 15 nm.
  • the number average particle size is determined by visual observation from a secondary electron emission image photograph obtained by a transmission electron microscope (TEM) or image processing of the image photograph, or a dynamic light scattering method, a static light scattering method, or the like. It can be measured by a particle size distribution meter using
  • the content of the conductive fine particles in the hard coat layer is preferably 30% by volume or more, and more preferably 40 to 60% by volume.
  • the hard coat layer is prepared by diluting a composition for forming a hard coat layer containing the material for forming the hard coat layer with a solvent as necessary, such as an unstretched film or a stretched film made of the transparent resin. It can apply
  • known methods such as spin coating, dipping, spraying, bar coating, and gravure can be used.
  • the solid content concentration in the composition for forming a hard coat layer can be appropriately adjusted within a range not impairing the solution stability. Usually, it is preferably about 0.1 to 20% by weight, preferably about 0.5 to 10% by weight. When the solid content concentration is less than this, convection of the coating solution occurs, and the surface unevenness after the hard coat layer is formed becomes large.
  • the hard coat layer forming composition may contain a leveling agent or a dispersant for the purpose of improving the uniformity of the layer thickness or improving the adhesion.
  • a leveling agent include surfactants and compounds that lower the surface tension such as silicone oil, fluorinated polyolefin, and polyacrylate, and examples of the dispersant include silane coupling agents.
  • silicone oil examples include unmodified dimethyl silicone oil and modified silicone oil.
  • modified silicone oil examples include long-chain alkyl-modified dimethyl silicone oil, fluorine-modified dimethyl silicone oil, methacryl-modified dimethyl silicone oil, carbinol-modified dimethyl silicone oil, and methylstyryl-modified dimethyl silicone oil.
  • the surfactant examples include a fluorine-based surfactant and a silicone-based surfactant.
  • Fluorosurfactants include non-ionic perfluoroalkylsulfonic acid amide group-containing nonions such as Fluorad FC-431 manufactured by 3M, MegaFac F-171, F-172, F-173, F manufactured by Dainippon Ink, Inc. Perfluoroalkyl group-containing oligomers such as -176PF, F-470, and F-471.
  • the silicone surfactant include polydimethylsiloxane in which the side chain or the end of the main chain is modified with various substituents such as oligomers such as ethylene glycol and propylene glycol.
  • the content of the surfactant contained in the composition for forming a hard coat layer is preferably 0.1 to 2.5% by weight, more preferably 0.8%, based on the total solid content of the composition for forming a hard coat layer. 5 to 2.0% by weight.
  • the relationship between the arithmetic average roughness (Ra h ) and Ra of the interface far from the base film of the hard coat layer is Ra h ⁇ Ra.
  • the Ra h is 0.1 ⁇ m or less, and more preferably less 0.07 .mu.m.
  • the surface tension of the composition for forming the hard coat layer is used.
  • the method of making small is mentioned.
  • the above-described leveling agent is added to the hard coat layer forming composition, or the solid content concentration of the hard coat layer forming composition is reduced. Is mentioned.
  • the surface of the hard coat layer can be subjected to surface treatment.
  • Examples of the surface treatment include the same methods as the surface treatment method for the base film described above.
  • the laminate of the base film and the hard coat layer obtained by forming the hard coat layer on the base film is the hard coat layer used in the present invention as it is or after peeling the base film as necessary. It can be used as a film having Furthermore, you may peel a base film, after sticking a 1st film and a 2nd film so that a base film may become an outermost layer.
  • the total thickness can be 30 ⁇ m to 500 ⁇ m.
  • the optical member of the present invention is (I) The post-curing adhesive is applied to the surface of the first film to be bonded, the surface of the second film to be bonded, or both, and a coating film of the post-curing adhesive is formed. , (II) drying the coating film to obtain an uncured layer of the post-curing adhesive; (III) Affix the first film and the second film so that the surfaces of the objects to be bonded face each other through the uncured layer, (IV) It can manufacture preferably by the manufacturing method of this invention including irradiating an active energy ray to the said unhardened layer, and setting it as a hardening adhesive layer.
  • the first film and the second film used in the above production method can be preferably supplied as long films.
  • the long film refers to a film having a length of at least about 5 times the width direction of the film, preferably 10 times or more, and specifically wound in a roll shape. It has a length enough to be stored or transported.
  • the surface of the first film and the second film to be bonded can be subjected to a pretreatment such as a corona treatment as necessary to enhance the adhesion of the post-curing adhesive.
  • a pretreatment such as a corona treatment as necessary to enhance the adhesion of the post-curing adhesive.
  • the formation of the coating film of the post-curing adhesive can be usually performed on either the surface to be bonded of the first film or the surface to be bonded of the second film.
  • a coating method a roll coating method, a curtain coating method, a die coating method such as a slot coating method, a spray coating method, and the like, which are generally applied to a continuous film, can be used, and is not particularly limited.
  • the thickness of the coating film can be appropriately adjusted according to the desired thickness of the cured adhesive layer, but is preferably 0.5 to 100 ⁇ m, and more preferably 1 to 50 ⁇ m. By setting the thickness of the coating film to 100 ⁇ m or less, it is possible to prevent the curing rate of the uncured layer from becoming too slow and to achieve sufficient curing, which is preferable.
  • step (II) drying can be performed by treating at 50 to 150 ° C. for 1 to 10 minutes, for example. By this drying, an uncured layer having a film thickness X is obtained.
  • the sticking can be performed by a generally used laminating means.
  • the continuous pressurization by the nip roll is achieved by continuously moving the pressurization in the direction parallel to the axial direction of the roll in a direction perpendicular to the roll on the surface of the laminate to be pressed. Pressure.
  • FIG. 1 is a schematic view showing a sticking step in the production method of the present invention.
  • the laminate composed of the first film 11 and the uncured layer 12 and the second film 13 ⁇ / b> A move in the direction of the arrow A ⁇ b> 1 and are continuously supplied between the cylindrical nip rolls 21 and 22.
  • the first film, the uncured layer, and the second film are continuously pressed by the nip rolls 21 and 22, and are composed of the first film 11, the uncured layer 12, and the second film 13B.
  • the body is continuously fed downstream.
  • the sticking in the step (III) is performed so as to eliminate bubble biting (a phenomenon in which air bubbles are formed between the first film and the second film) at the time of bonding.
  • bubble biting a phenomenon in which air bubbles are formed between the first film and the second film
  • the adhesive protrudes on the upstream side of the nip roll.
  • the protrusion 12H of the uncured layer 12 is illustrated between the first film 11 and the second film 13A.
  • Such protrusions make the thickness of the adhesive layer non-uniform and significantly reduce the performance of the product as an optical member.
  • the post-curing adhesive containing the predetermined particles used in the optical member of the present invention is an uncured layer dried at a predetermined thickness, and continuous pressing is applied to the layer, the protrusion is remarkably reduced. Is done. Therefore, uniform pressurization can be achieved without lowering the narrow pressure, thereby making it possible to achieve both the uniformity of film thickness and the reduction of bubble biting, resulting in optical performance and An optical member having good durability can be obtained.
  • a material having a rubber hardness of 60 degrees to 100 degrees such as acrylonitrile butadiene rubber or silicon rubber, or a metal such as SUS or iron can be used.
  • a rubber roll is used for the nip roll 21 in contact with 13A, and a metal is used for the nip roll 22 in contact with 11. It is preferable to use a roll. By doing so, it is possible to suppress the occurrence of curling of the optical member due to the lamination.
  • Irradiation of the active energy ray to the uncured layer in the step (IV) may be performed from one surface side through one of the first film and the second film, or from both surface sides as necessary.
  • the first film is a film including a cholesteric resin layer, and thus a film that reflects a part of incident light
  • the second film is a transparent film (for example, a film having a total light transmittance of 80% or more).
  • Active energy rays can be preferably irradiated through the second film.
  • the active energy ray to be irradiated can be various energy rays suitable for the post-curing adhesive used, for example, ultraviolet rays, visible rays and other electron beams. It is preferable to irradiate ultraviolet rays using an ultraviolet curable adhesive. Irradiation can be performed by applying uniform irradiation in the width direction of the film and continuously supplying the film to the irradiation region with respect to the bonded long film after completion of the step (III).
  • Examples of the light source used for irradiating ultraviolet rays include a low pressure mercury lamp, a medium pressure mercury lamp, a high pressure mercury lamp, an ultrahigh pressure mercury lamp, a chemical lamp, a black light lamp, a microwave excitation mercury lamp, and a metal halide lamp.
  • the irradiation intensity at the time of irradiation with ultraviolet rays is not particularly limited, but the irradiation intensity in the wavelength region effective for activating the polymerization initiator is preferably 50 to 5000 mW / cm 2 .
  • the irradiation intensity in such a region is more preferably from 100 to 3000 mW / cm 2 , and even more preferably from 300 to 2000 mW / cm 2 .
  • the reaction time becomes too long and the curing may be insufficient.
  • the irradiation intensity exceeds 5000 mW / cm 2
  • the adhesive may be yellowed due to radiant heat from the lamp, polymerization reaction heat, or the like, and the shrinkage of the adhesive layer may increase, resulting in a decrease in adhesive strength.
  • the light irradiation time is appropriately selected according to the curing state and is not particularly limited.
  • the integrated light amount expressed as the product of the irradiation intensity and the irradiation time is 10 to 5,000 mJ / cm 2. It is preferable to set to. More preferably accumulated light amount is 100 ⁇ 3000mJ / cm 2, even more preferred to be 500 ⁇ 2000mJ / cm 2.
  • Steps (I) to (IV) can be carried out continuously in part or in whole as required, thereby enabling efficient production.
  • step (I) to (IV) additional processing can be optionally performed to obtain an optical member as a final product.
  • the base material is peeled off as necessary after the completion of step (IV) to obtain a final product.
  • a base film is peeled off as needed after completion of process (IV), and it is set as a final product. be able to.
  • optical member of the present invention is not particularly limited, and can be used as various optical members that are required to be composed of a plurality of layers by appropriately selecting the first film and the second film. .
  • the first film a film having a cholesteric resin layer is used as the selective reflection layer
  • an unstretched film made of a transparent resin is used as a quarter wavelength plate
  • the optical member of the present invention is used for luminance.
  • the brightness enhancement film can be provided between the backlight and the liquid crystal cell in the liquid crystal display device.
  • the brightness enhancement film provided at such a position expresses a function of supplying only predetermined circularly polarized light of the light supplied from the backlight to the liquid crystal cell and returning light other than the predetermined circularly polarized light to the backlight. be able to.
  • the returned light is reflected by the backlight, the polarization state changes, becomes the predetermined circularly polarized light, and can be supplied to the liquid crystal cell.
  • the brightness enhancement film can efficiently supply desired polarized light to the liquid crystal cell.
  • a polarizing plate of a polarizing plate that uses a film having a hard coat layer as the first film, a thin unstretched film made of a transparent resin as the second film, and uses the optical member of the present invention for a liquid crystal display device. It can be used as a thin polarizing plate protective film for protecting the child.
  • the polarizing plate composite of the present invention includes a polarizing plate and the optical member of the present invention provided on at least one surface of the polarizing plate.
  • the liquid crystal display device of the present invention includes the polarizing plate composite of the present invention.
  • a film having a cholesteric resin layer as a first film is used as a selective reflection layer
  • a stretched film made of a transparent resin is used as a second film as a quarter-wave plate
  • the present invention is configured as a brightness enhancement film.
  • the optical member is bonded to the polarizing plate, and the layer configuration of (cholesteric resin layer)-(cured adhesive layer)-(quarter wavelength plate)-(polarizing plate), or between these layers as necessary.
  • a polarizing plate composite having an arbitrary layer (such as an adhesive layer for bonding a quarter-wave plate and a polarizing plate) can be formed.
  • a liquid crystal display device can be easily configured using such a polarizing plate composite. Specifically, by providing such a polarizing plate composite on the light incident surface side of the liquid crystal cell, a liquid crystal having a cholesteric resin layer, a quarter wavelength plate and a polarizing plate between the backlight and the liquid crystal cell. The display device can be easily configured.
  • a book configured as an optical member using a film having a hard coat layer as the first film, an unstretched film made of a transparent resin as the second film, and having a function as a protective film or an antireflection film
  • the optical member of the invention can be bonded to a polarizing plate to form a polarizing plate composite having a hard coat layer.
  • a liquid crystal display device can be easily configured using such a polarizing plate composite. Specifically, by providing such a polarizing plate composite on the light exiting surface side or the light entering surface side of the liquid crystal cell, a liquid crystal display device having a hard coating layer on the display surface or the back surface can be easily obtained. Can be configured.
  • the film which has a hard-coat layer as a 1st film using the stretched film which consists of transparent resin as a 2nd film, it was comprised as an optical member which has a function as a protective film or an antireflection film.
  • An optical member can be bonded to a polarizing plate to form a polarizing plate composite having a hard coat layer.
  • a liquid crystal display device can be easily configured. Specifically, by providing such a polarizing plate composite on the light output surface side of the liquid crystal cell, a liquid crystal cell display A liquid crystal display device that emits predetermined circularly polarized light from the surface and has a hard coat layer and is highly killable can be easily configured.
  • Rod-like liquid crystal compound (compound 29.1 parts represented by the following formula (C3), 7.28 parts compound represented by the following formula (C4), photopolymerization initiator (trade name “IRG907, manufactured by Ciba Specialty Chemicals Co., Ltd.) ”) 1.20 parts, 2.22 parts of chiral agent (trade name“ LC756 ”manufactured by BASF Corporation), 0.04 part of surfactant KH40 (manufactured by Seimi Chemical), and 60.00 parts of 2-butanone (solvent) Were mixed to prepare a cholesteric liquid crystal composition.
  • photopolymerization initiator trade name “IRG907, manufactured by Ciba Specialty Chemicals Co., Ltd.
  • chiral agent trade name“ LC756 ”manufactured by BASF Corporation
  • surfactant KH40 manufactured by Seimi Chemical
  • 2-butanone solvent
  • This cholesteric liquid crystal composition was applied to the surface having the alignment film of the base material having the alignment film prepared above with a die coater.
  • the coating film is subjected to an orientation treatment at 100 ° C. for 5 minutes, and the coating film is subjected to a process of irradiation with weak ultraviolet rays of 0.1 to 45 mJ / cm 2 and subsequent heating treatment at 100 ° C. for 1 minute.
  • the laminated body which has the following layer structure was obtained, and this was used as the first film in this example.
  • the laminated body had a long shape with a width of 1350 mm.
  • Resin pellets with an alicyclic structure as a transparent thermoplastic resin (ZEONOR1420, glass transition temperature 136 ° C, manufactured by Nippon Zeon Co., Ltd.) are dried at 100 ° C for 5 hours, supplied to an extrusion molding machine, and the lip opening is adjusted.
  • the die was extruded into a sheet shape on a cooling roll and cooled on the cooling roll to obtain a long unstretched film having an average thickness of 100 ⁇ m.
  • the film before stretching was continuously supplied to a longitudinal uniaxial stretching machine, and longitudinal uniaxial stretching with a stretching temperature of 150 ° C. and a stretching ratio of 1.3 times was performed to obtain a longitudinal uniaxially stretched film having an average film thickness of 87 ⁇ m. Furthermore, a longitudinally uniaxially stretched film was continuously supplied to an oblique stretching machine, and oblique stretching was performed to obtain a quarter wavelength plate having an average thickness of 32 ⁇ m and an average orientation angle of 45 °.
  • the quarter-wave plate was a long shape with a width of 1350 mm. Regarding the retardation value of the obtained quarter-wave plate at a wavelength of 550 nm, the retardation Rth in the thickness direction was 158 nm, and the retardation Re in the in-plane direction was 140 nm.
  • (1-3. Post-curing adhesive) (Meth) acrylate (A), (meth) acrylate (B) and particles having the composition shown in Table 1, and photopolymerization initiator IRGACURE 651 (manufactured by Ciba Specialty Chemicals) and methyl ethyl ketone are mixed, and a post-curing adhesive is prepared.
  • a post-curing adhesive is prepared.
  • the ratio of the photopolymerization initiator was 1.0 part in the total solid content of the post-curing adhesive.
  • the ratio of methyl ethyl ketone was adjusted so that the solid content ratio (ratio of all components other than methyl ethyl ketone) in the post-curing adhesive was 45%.
  • the shape and average particle diameter of the particles are as shown in Table 1.
  • the long laminate obtained in 4) is sandwiched between the nip rolls 21 and 22 to perform continuous pasting, (base material)-(alignment film)-(cholesteric resin layer)-(uncured layer)
  • a laminate having a layer configuration of-(1 ⁇ 4 wavelength plate) was obtained.
  • the moving speed of the film (moving speed in the direction indicated by arrow A1) was 0.5 m / min.
  • the narrow pressure was 0.3 to 0.4 MPa. No protrusion 12H of the uncured layer 12 at the position upstream of the nip roll was observed.
  • Examples 2 to 5 A brightness enhancement film was obtained and evaluated in the same manner as in Example 1 except that the shape of the particles constituting the post-curing adhesive and the type and ratio of each component were changed as shown in Tables 1 and 2. In the step (1-4), the viscosity of the uncured layer was measured in the same manner. The results are shown in Tables 1 and 2.
  • a hard coat layer (P-5790-PS3A manufactured by Daido Kasei Co., Ltd.) is formed on one side of a PET film (Lumirror 100T60 manufactured by Toray Industries, Inc.) with a film thickness of 5 ⁇ m.
  • the hard coat layer and the ZEONOR film are opposed to each other by using the ZEONOR film having a film thickness of 30 ⁇ m instead of the quarter wavelength plate prepared in the step (1-2).
  • Example 2 An optical member having a layer structure of (cured adhesive layer)-(ZEONOR film) was obtained and evaluated.
  • the adhesive strength was evaluated in the same manner except that the brightness enhancement film of (1-7. Evaluation) was changed to a hard coat film and a cut was made on the hard coat layer surface.
  • Table 2 The results are shown in Table 2.
  • the hard coat film was evaluated for killing resistance by a pencil hardness test. The test was conducted in accordance with the JIS K5600-5-4 scratch hardness test method except that the load was 500 g, the scanning distance was 30 mm, and the stamping speed was 20 mm / min. The result was H.
  • Example 7 A brightness enhancement film was obtained and evaluated in the same manner as in Example 1 except that the shape of the particles constituting the post-curing adhesive and the type and ratio of each component were changed as shown in Table 2.
  • the viscosity of the uncured layer was measured in the same manner.
  • the shape of the particles used in this example was a biconvex lens shape with an average diameter of 5.2 ⁇ m, and the short diameter (corresponding to the lens thickness) was 4.3 ⁇ m. The results are shown in Table 2.
  • Example 8> A brightness enhancement film was obtained and evaluated in the same manner as in Example 1 except that the types and ratios of the components constituting the post-curing adhesive were changed as shown in Table 2.
  • the viscosity of the uncured layer was measured in the same manner.
  • organosilica sol MEK-ST trade name, silica sol manufactured by Nissan Chemical Industries, Ltd., 76.6 parts (23 parts as SiO 2 ) of methyl ethyl ketone dispersion containing 30% SiO 2 having a particle diameter of 10 to 20 nm was added. The results are shown in Table 2.
  • a hard coat layer (P-5790-PS3A manufactured by Daido Kasei Co., Ltd.) is formed on one side of a PET film (Lumirror 100T60 manufactured by Toray Industries, Inc.) with a film thickness of 5 ⁇ m.
  • the hard coat layer and the ZEONOR film are opposed to each other by using the ZEONOR film having a film thickness of 30 ⁇ m instead of the quarter wavelength plate prepared in the step (1-2).
  • UV7000B manufactured by Nippon Synthetic Chemical Co., Ltd.
  • UV6640B manufactured by Nippon Gosei Chemical Co., Ltd.
  • trade name “purple UV6640B” urethane acrylate DA141 trade name, manufactured by Nagase ChemteX Corporation 2-hydroxy-3-phenoxypropyl Acrylate
  • EA5120 Trade name, Shin-Nakamura Chemical NK Oligo 2-ethylhexyl acrylate
  • HEA Trade name, Osaka Organic Chemical Industry 2-hydroxyethyl acrylate
  • Example 10> (10-1. Polarizing plate) An absorption type polarizing plate (HCL2-5618, manufactured by Sanlitz) was immersed in distilled water at 23 ° C. for 1 day, the one-side protective film was peeled off, and dried at room temperature for 1 day. It was.
  • HCL2-5618 absorption type polarizing plate
  • Example 6 (10-2. Polarizing plate composite)
  • the optical member produced in Example 6 was subjected to corona treatment so that the wetting index was 56 dyne / cm on the ZEONOR film side, and 3.0 parts of PVA (trade name “GOHSEIMER Z200”, manufactured by Nippon Synthetic Chemical Co., Ltd.)
  • a PVA adhesive layer comprising 0.05 part of glyoxal (trade name “Glyoxal”, manufactured by Nippon Synthetic Chemical Co., Ltd.) and 97.0 parts of pure water was applied with a # 8 bar and dried to obtain a PVA adhesive layer.
  • the surface of the polarizing plate obtained in (10-1) that does not have a protective film (the surface on which the polarizer is exposed) is pasted, and (hard coat layer)-(cured adhesive)
  • a polarizing plate composite having a layer structure of (layer)-(ZEONOR film)-(PVA adhesive layer)-(polarizer)-(protective film) was obtained.
  • ⁇ Comparative Example 9> As a brightness enhancement film, a liquid crystal monitor was assembled, displayed white, and the display surface was observed in the same manner as in Example 9, except that the film obtained in Comparative Example 1 was used instead of the film obtained in Example 1. did. As a result, unevenness due to the thickness of the adhesive layer was observed in the display surface.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Polarising Elements (AREA)
  • Laminated Bodies (AREA)
  • Liquid Crystal (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Surface Treatment Of Optical Elements (AREA)

Abstract

L'invention concerne un élément optique caractérisé en ce qu'un premier film, une couche d'adhésif durci et un deuxième film sont stratifiés dans cet ordre. Ladite couche d'adhésif durci est une couche formée par durcissement d'une couche non traitée d'un adhésif post-traité. La viscosité de ladite couche non traitée est comprise entre 50 et 6000 mPa·s inclus à une température de 20±1,0°C. L'épaisseur (X) (μm) de film de ladite couche non traitée est comprise entre 1,0 et 20,0 μm inclus. Ladite couche d'adhésif durci contient des particules présentant une taille moyenne de particules Y (μm), ladite taille moyenne de particules Y vérifiant la relation 0,6 X ≤ Y ≤ 0,95 X. L'invention concerne en outre un procédé de production dudit élément, ainsi qu'une utilisation de celui-ci.
PCT/JP2010/069469 2009-11-13 2010-11-02 Élément optique, procédé de production, composite pour plaque polarisante et dispositif d'affichage à cristaux liquides WO2011058904A1 (fr)

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WO2022075264A1 (fr) * 2020-10-09 2022-04-14 富士フイルム株式会社 Procédé de fabrication d'un système optique pour visiocasque

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WO2013183680A1 (fr) * 2012-06-08 2013-12-12 日東電工株式会社 Composition adhésive durcissable sous l'action d'un rayonnement d'énergie active, film de polarisation et son procédé de fabrication, film optique et dispositif d'affichage d'images
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KR101577114B1 (ko) 2013-10-11 2015-12-11 제일모직주식회사 편광판용 접착제 조성물, 이를 포함하는 편광판 및 이를 포함하는 디스플레이 장치
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WO2021020302A1 (fr) * 2019-07-26 2021-02-04 日本ペイント・オートモーティブコーティングス株式会社 Procédé de fabrication de film stratifié et procédé de fabrication d'élément stratifié
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WO2021131367A1 (fr) * 2019-12-23 2021-07-01 住友化学株式会社 Procédé de fabrication de stratifié optique
WO2022075264A1 (fr) * 2020-10-09 2022-04-14 富士フイルム株式会社 Procédé de fabrication d'un système optique pour visiocasque

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