WO2023037721A1 - Stratifié optique et dispositif d'affichage d'image l'utilisant - Google Patents

Stratifié optique et dispositif d'affichage d'image l'utilisant Download PDF

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WO2023037721A1
WO2023037721A1 PCT/JP2022/025964 JP2022025964W WO2023037721A1 WO 2023037721 A1 WO2023037721 A1 WO 2023037721A1 JP 2022025964 W JP2022025964 W JP 2022025964W WO 2023037721 A1 WO2023037721 A1 WO 2023037721A1
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layer
moisture
meth
display device
optical laminate
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PCT/JP2022/025964
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English (en)
Japanese (ja)
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寛 友久
雅人 藤田
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日東電工株式会社
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Priority to CN202280045095.1A priority Critical patent/CN117616314A/zh
Priority to KR1020247005133A priority patent/KR20240056493A/ko
Publication of WO2023037721A1 publication Critical patent/WO2023037721A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • 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
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/04—Non-macromolecular additives inorganic
    • 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
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/06—Non-macromolecular additives organic
    • 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
    • C09J9/00—Adhesives characterised by their physical nature or the effects produced, e.g. glue sticks
    • C09J9/02—Electrically-conducting adhesives
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/14—Protective coatings, e.g. hard coatings
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/16—Optical coatings produced by application to, or surface treatment of, optical elements having an anti-static effect, e.g. electrically conducting coatings
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G—PHYSICS
    • 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
    • G02F1/13363—Birefringent elements, e.g. for optical compensation
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00

Definitions

  • the present invention relates to an optical laminate and an image display device using the same.
  • Image display devices typified by liquid crystal display devices and electroluminescence (EL) display devices (eg, organic EL display devices and inorganic EL display devices) are rapidly spreading.
  • EL electroluminescence
  • a polarizing plate is typically attached to a display panel via an adhesive layer.
  • a polarizing film having an antistatic layer with a surface resistance of 1.0 ⁇ 10 9 ⁇ / ⁇ to 1.0 ⁇ 10 11 ⁇ / ⁇ on the viewing side of the liquid crystal layer Patent Reference 1.
  • a pressure-sensitive adhesive layer having antistatic properties Adhesives with antistatic properties may contain large amounts of antistatic agents to ensure sufficient antistatic properties.
  • a polarizing plate using such an adhesive layer may have a problem of adverse effects on the polarizing plate in a humid environment.
  • corrosion of the touch panel sensor may occur in a humid environment.
  • the present invention has been made to solve the above-mentioned conventional problems, and its main object is to provide an optical layered body having excellent antistatic performance and excellent humidification durability, and this optical layered body.
  • An object of the present invention is to provide an image display device using
  • An optical laminate comprises a polarizing plate including a polarizer and a protective layer arranged at least on the viewing side of the polarizer, a conductive adhesive layer, and a moisture-proof layer, which are arranged from the viewing side.
  • the conductive pressure-sensitive adhesive layer has a surface resistance value of 1 ⁇ 10 7 ⁇ / ⁇ to 1 ⁇ 10 10 ⁇ / ⁇ , and the moisture permeability of the moisture-proof layer is 20 g/m 2 ⁇ 24 h to 500 g/m 2.24 hours.
  • the conductive pressure-sensitive adhesive layer is a layer formed from a pressure-sensitive adhesive composition containing a base polymer and an antistatic agent, and the antistatic agent is added to 100 parts by weight of the base polymer.
  • the moisture-proof layer also functions as a protective layer and/or a retardation layer.
  • the polarizer includes a protective layer only on the viewing side.
  • the antistatic agent is an ionic compound.
  • the ionic compound is at least one selected from alkali metal salts and organic cation-anion salts.
  • the conductive adhesive layer has a thickness of 2 ⁇ m to 55 ⁇ m.
  • an optical layered body having excellent antistatic performance and excellent humidification durability it is possible to provide an optical layered body having excellent antistatic performance and excellent humidification durability, and an image display device having the optical layered body.
  • FIG. 1 is a schematic cross-sectional view of an optical stack according to one embodiment of the invention
  • FIG. 1 is a schematic cross-sectional view of an image display device according to one embodiment of the present invention
  • FIG. 1 is a schematic cross-sectional view of an image display device according to one embodiment of the present invention
  • FIG. 1 is a schematic cross-sectional view of an optical layered body according to one embodiment of the present invention.
  • the illustrated optical laminate 100 typically has a polarizing plate 10, a conductive adhesive layer 20, and a moisture-proof layer 30 in this order from the viewing side.
  • the polarizing plate 10 includes a polarizer 11 and a protective layer (viewing-side protective layer) 12 on at least the viewing side of the polarizer 11 .
  • a protective layer (inner protective layer) 13 is provided on the opposite side of the polarizer 11 from the viewing side, but the protective layer 13 may be omitted depending on the purpose.
  • the polarizer 10 includes only the protective layer 12 on the viewing side.
  • an adhesive layer (not shown) is provided on the opposite side of the moisture-proof layer 30 from the polarizing plate 10 (that is, as the outermost layer on the side opposite to the viewing side), and the optical laminate is attached to the image display device. can be attached. Furthermore, it is preferable that a release liner is temporarily attached to the surface of the pressure-sensitive adhesive layer until the optical layered body is used. By temporarily attaching the release liner, it is possible to protect the pressure-sensitive adhesive layer and to form a roll of the retardation layer-attached polarizing plate.
  • the conductive pressure-sensitive adhesive layer has a surface resistance value of 1 ⁇ 10 7 ⁇ / ⁇ to 1 ⁇ 10 10 ⁇ / ⁇ . If the surface resistance value of the conductive pressure-sensitive adhesive layer is within the above range, excellent antistatic performance can be exhibited.
  • the moisture permeability of the moisture-proof layer is 20 g/m 2 ⁇ 24h to 500 g/m 2 ⁇ 24h.
  • the moisture permeability of the moisture-proof layer 30 is 20 g/m 2 ⁇ 24 h to 500 g/m 2 ⁇ 24 h, preferably 30 g/m 2 ⁇ 24 h to 450 g/m 2 ⁇ 24 h, more preferably 30 g/m 2 ⁇ 24h to 400g/m 2 ⁇ 24h.
  • moisture permeability refers to a value measured according to JIS Z 0208.
  • the optical laminate may further contain other optical functional layers.
  • the type, characteristics, number, combination, arrangement position, etc. of the optical functional layers that can be provided in the optical layered body can be appropriately set according to the purpose.
  • the optical laminate may further have a retardation layer, a conductive layer, or an isotropic substrate with a conductive layer (none of which is shown).
  • a retardation layer, a conductive layer, or an isotropic substrate with a conductive layer is typically provided outside the moisture-proof layer 30 (on the side opposite to the polarizing plate 10).
  • the optical laminate can be applied to a so-called inner touch panel type input display device.
  • the optical laminate includes a retardation layer
  • the optical properties of the retardation layer e.g., refractive index characteristics, in-plane retardation, Nz coefficient, photoelastic coefficient
  • thickness may be changed depending on the purpose. can be set appropriately.
  • the total thickness of the optical laminate is preferably 60 ⁇ m to 250 ⁇ m, more preferably 70 ⁇ m to 200 ⁇ m, still more preferably 80 ⁇ m to 150 ⁇ m.
  • the total thickness of the optical laminate is the total thickness of the viewing side protective layer, polarizer, inner protective layer, conductive pressure-sensitive adhesive layer, moisture-proof layer, and any other optical function layer. say.
  • Polarizing plate B-1 Polarizer Any appropriate polarizer can be employed as the polarizer 11 .
  • the resin film forming the polarizer may be a single-layer resin film or a laminate of two or more layers.
  • the polarizer composed of a single-layer resin film include hydrophilic polymer films such as polyvinyl alcohol (PVA) films, partially formalized PVA films, and partially saponified ethylene/vinyl acetate copolymer films.
  • hydrophilic polymer films such as polyvinyl alcohol (PVA) films, partially formalized PVA films, and partially saponified ethylene/vinyl acetate copolymer films.
  • oriented polyene films such as those dyed with dichroic substances such as iodine and dichroic dyes and stretched, and dehydrated PVA and dehydrochlorinated polyvinyl chloride films.
  • a polarizer obtained by dyeing a PVA-based film with iodine and uniaxially stretching the film is preferably used because of its excellent optical properties.
  • the dyeing with iodine is performed, for example, by immersing the PVA-based film in an aqueous iodine solution.
  • the draw ratio of the uniaxial drawing is preferably 3 to 7 times. Stretching may be performed after the dyeing treatment, or may be performed while dyeing. Moreover, you may dye after extending
  • the PVA-based film is subjected to swelling treatment, cross-linking treatment, washing treatment, drying treatment, and the like. For example, by immersing the PVA-based film in water and washing it with water before dyeing, not only can dirt and anti-blocking agents on the surface of the PVA-based film be washed away, but also the PVA-based film can be swollen to remove uneven dyeing. can be prevented.
  • a polarizer can typically be produced using a laminate of two or more layers.
  • a specific example of a polarizer obtained using a laminate is a polarizer obtained using a laminate of a resin substrate and a PVA-based resin layer formed by coating on the resin substrate.
  • a polarizer obtained by using a laminate of a resin base material and a PVA-based resin layer formed by coating on the resin base material is obtained, for example, by applying a PVA-based resin solution to the resin base material and drying the resin base material. forming a PVA-based resin layer thereon to obtain a laminate of a resin substrate and a PVA-based resin layer; stretching and dyeing the laminate to use the PVA-based resin layer as a polarizer; obtain.
  • Stretching typically includes immersing the laminate in an aqueous boric acid solution for stretching. Furthermore, stretching may further include stretching the laminate in air at a high temperature (eg, 95° C. or higher) before stretching in an aqueous boric acid solution, if necessary.
  • the obtained resin substrate/polarizer laminate may be used as it is (that is, the resin substrate may be used as a protective layer for the polarizer), or the resin substrate may be peeled off from the resin substrate/polarizer laminate. Then, any appropriate protective layer may be laminated on the release surface according to the purpose. Details of the method for manufacturing such a polarizer are described in, for example, Japanese Patent Application Laid-Open No. 2012-73580 and Japanese Patent No. 6470455. These publications are incorporated herein by reference in their entirety.
  • a typical method for producing a polarizer is to form a laminate by forming a polyvinyl alcohol-based resin layer containing a halide and a polyvinyl alcohol-based resin on one side of a long thermoplastic resin substrate, Then, the laminate is subjected in this order to an in-air auxiliary stretching process, a dyeing process, an underwater stretching process, and a drying shrinkage process that shrinks the laminate by 2% or more in the width direction by heating while being transported in the longitudinal direction. including.
  • an in-air auxiliary stretching process a dyeing process, an underwater stretching process, and a drying shrinkage process that shrinks the laminate by 2% or more in the width direction by heating while being transported in the longitudinal direction.
  • the thickness of the polarizer is preferably 15 ⁇ m or less, more preferably 12 ⁇ m or less, still more preferably 10 ⁇ m or less, and particularly preferably 8 ⁇ m or less.
  • the thickness of the polarizer is preferably 1 ⁇ m or more, more preferably 2 ⁇ m or more, and even more preferably 3 ⁇ m or more. If the thickness of the polarizer is within such a range, it is possible to satisfactorily suppress curling during heating, and obtain excellent durability in appearance during heating.
  • the polarizer preferably exhibits absorption dichroism at any wavelength of 380 nm to 780 nm.
  • the single transmittance of the polarizer is, for example, 41.5% to 46.0%, preferably 43.0% to 46.0%, and preferably 44.5% to 46.0%.
  • the degree of polarization of the polarizer is preferably 97.0% or higher, more preferably 99.0% or higher, still more preferably 99.9% or higher.
  • Protective Layers View side protective layer 12 and inner protective layer 13 are composed of any suitable film that can be used as protective layers for polarizers.
  • the material that is the main component of the film include cellulose resins such as triacetyl cellulose (TAC), polyesters, polyvinyl alcohols, polycarbonates, polyamides, polyimides, polyethersulfones, polysulfones, Examples include transparent resins such as polystyrene, polynorbornene, polyolefin, (meth)acrylic, and acetate.
  • Thermosetting resins such as (meth)acrylic, urethane, (meth)acrylic urethane, epoxy, and silicone, or ultraviolet curable resins may also be used.
  • a glassy polymer such as a siloxane-based polymer can also be used.
  • polymer films described in JP-A-2001-343529 can also be used. Materials for this film include, for example, a resin composition containing a thermoplastic resin having a substituted or unsubstituted imide group in a side chain and a thermoplastic resin having a substituted or unsubstituted phenyl group and nitrile group in a side chain.
  • the polymer film can be, for example, an extrudate of the resin composition.
  • the protective layer 12 is typically arranged on the viewing side.
  • the protective layer 12 may be subjected to surface treatment such as hard coat treatment, anti-reflection treatment, anti-sticking treatment, anti-glare treatment, etc., as required.
  • the thickness of the protective layer 12 is preferably 10 ⁇ m to 50 ⁇ m, more preferably 15 ⁇ m to 35 ⁇ m.
  • the thickness of the outer protective layer is the thickness including the thickness of the surface treatment layer.
  • the surface resistance value of the conductive adhesive layer is 1 ⁇ 10 7 ⁇ / ⁇ to 1 ⁇ 10 10 ⁇ / ⁇ . It is preferably 5 ⁇ 10 7 ⁇ /square to 8 ⁇ 10 9 ⁇ /square, more preferably 7 ⁇ 10 7 ⁇ /square to 7 ⁇ 10 9 ⁇ /square, even more preferably 8 ⁇ 10 7 ⁇ /square. ⁇ to 6 ⁇ 10 9 ⁇ / ⁇ . When the surface resistance value is within the above range, excellent antistatic performance can be exhibited.
  • the thickness of the conductive adhesive layer is preferably 2 ⁇ m to 55 ⁇ m, more preferably 2 ⁇ m to 30 ⁇ m, still more preferably 5 ⁇ m to 25 ⁇ m. Even with such a thickness, the conductive pressure-sensitive adhesive layer has excellent antistatic performance (for example, 1 ⁇ 10 7 ⁇ / ⁇ to 1 ⁇ 10 10 ⁇ / ⁇ ).
  • the conductive adhesive layer is preferably a layer formed from an adhesive composition containing a base polymer and an antistatic agent.
  • the adhesive composition can be prepared, for example, by adding an antistatic agent to any suitable adhesive.
  • adhesives include rubber-based adhesives, acrylic adhesives, silicone-based adhesives, urethane-based adhesives, vinyl alkyl ether-based adhesives, polyvinylpyrrolidone-based adhesives, polyacrylamide-based adhesives, and cellulose-based adhesives. etc.
  • An adhesive base polymer is selected according to the type of adhesive.
  • acrylic adhesives are preferably used because they have excellent optical transparency, exhibit appropriate wettability, cohesiveness, and adhesive properties, and are excellent in weather resistance and heat resistance. be.
  • the acrylic pressure-sensitive adhesive contains a (meth)acrylic polymer as a base polymer.
  • a (meth)acrylic polymer usually contains alkyl (meth)acrylate as a main component as a monomer unit.
  • (meth)acrylate refers to acrylate and/or methacrylate.
  • Alkyl (meth)acrylates constituting the main skeleton of the (meth)acrylic polymer include linear or branched alkyl groups having 1 to 18 carbon atoms. These may be used alone or in combination of two or more. The average carbon number of these alkyl groups is preferably 3-9.
  • alkyl (meth) acrylates containing aromatic rings such as phenoxyethyl (meth) acrylate and benzyl (meth) acrylate. good.
  • the (meth)acrylic polymer has a polymerizable functional group having an unsaturated double bond such as a (meth)acryloyl group or a vinyl group for the purpose of improving adhesiveness and heat resistance.
  • Polymerized monomers may be introduced by copolymerization. Specific examples of copolymerizable monomers include 2-hydroxyethyl (meth)acrylate, 3-hydroxypropyl (meth)acrylate, 4-hydroxybutyl (meth)acrylate, and 6-hydroxyhexyl (meth)acrylate.
  • (N-substituted) amides such as (meth)acrylamide, N,N-dimethyl(meth)acrylamide, N-butyl(meth)acrylamide, N-methylol(meth)acrylamide, N-methylolpropane(meth)acrylamide Monomers; Alkylaminoalkyl (meth)acrylate monomers such as aminoethyl (meth)acrylate, N,N-dimethylaminoethyl (meth)acrylate, and t-butylaminoethyl (meth)acrylate; (meth)acrylic Alkoxyalkyl (meth)acrylate monomers such as methoxyethyl acid and ethoxyethyl (meth)acrylate; N-(meth)acryloyloxymethylenesuccinimide, N-(meth)acryloyl-6-oxyhexamethylenesuccinimide, N-( meth) succinimide monomers such as acrylo
  • Examples of copolymerizable monomers other than the above include silane-based monomers containing silicon atoms.
  • silane monomers include 3-acryloxypropyltriethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, 4-vinylbutyltrimethoxysilane, 4-vinylbutyltriethoxysilane, 8-vinyloctyltrimethoxysilane.
  • the copolymerizable monomer tripropylene glycol di(meth)acrylate, tetraethylene glycol di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, bisphenol A diglycidyl ether di(meth)acrylate, neo Pentyl glycol di(meth)acrylate, trimethylolpropane tri(meth)acrylate, pentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, dipentaerythritol penta(meth)acrylate, dipentaerythritol hexa(meth)acrylate , (meth)acryloyl groups such as esters of (meth)acrylic acid and polyhydric alcohols such as caprolactone-modified dipentaerythritol hexa(meth)acrylate, polyfunctional having two or more unsaturated double
  • the (meth)acrylic polymer is mainly composed of alkyl (meth)acrylate in the weight ratio of all constituent monomers, and the ratio of the copolymerized monomer in the (meth)acrylic polymer can be set to any appropriate value.
  • the proportion of the copolymerizable monomer is, for example, 0% to 20%, preferably 0.1% to 15%, more preferably 0.1% to 10%, in terms of the weight ratio of all constituent monomers. .
  • hydroxyl group-containing monomers and carboxyl group-containing monomers are preferably used from the viewpoint of adhesiveness and durability.
  • a hydroxyl group-containing monomer and a carboxyl group-containing monomer can be used in combination.
  • These copolymerizable monomers become reaction points with a cross-linking agent when the pressure-sensitive adhesive composition contains the cross-linking agent.
  • Hydroxyl group-containing monomers, carboxyl group-containing monomers, and the like are highly reactive with the intermolecular cross-linking agent, and are therefore preferably used to improve cohesiveness and heat resistance of the pressure-sensitive adhesive layer to be obtained.
  • a hydroxyl group-containing monomer is preferable from the viewpoint of reworkability, and a carboxyl group-containing monomer is preferable from the viewpoint of achieving both durability and reworkability.
  • an amide group-containing monomer is preferably used because it is easy to lower the resistance value and is easy to stabilize even in a humidified environment, and is used in combination with the hydroxyl group-containing monomer and the carboxyl group-containing monomer. can do.
  • a hydroxyl group-containing monomer When a hydroxyl group-containing monomer is contained as a copolymerizable monomer, the proportion thereof is preferably 0.01% by weight to 15% by weight, more preferably 0.03% by weight to 10% by weight, and still more preferably 0.05% to 7% by weight.
  • a carboxyl group-containing monomer When a carboxyl group-containing monomer is contained as a copolymerizable monomer, the proportion thereof is preferably 0.05% by weight to 10% by weight, more preferably 0.1% by weight to 8% by weight, and still more preferably 0.2% to 6% by weight.
  • an amide group-containing monomer When an amide group-containing monomer is contained, its proportion is preferably 0.1% by weight or more.
  • (Meth)acrylic polymers with a weight average molecular weight of 500,000 to 3,000,000 are usually used. From the standpoint of durability, particularly heat resistance, the weight average molecular weight is preferably 700,000 to 2,700,000, more preferably 800,000 to 2,500,000. If the weight average molecular weight is less than 500,000, there is room for improvement in heat resistance. Moreover, when the weight average molecular weight exceeds 3,000,000, a large amount of diluent solvent is required to adjust the viscosity for coating, which may increase the cost.
  • a weight average molecular weight means the value calculated by measuring by GPC (gel permeation chromatography) and polystyrene conversion.
  • the (meth)acrylic polymer to be obtained may be a random copolymer, a block copolymer, a graft copolymer, or the like.
  • antistatic agent Any suitable antistatic agent can be used as the antistatic agent.
  • an ionic compound is preferable from the viewpoint of compatibility with the base polymer and transparency of the pressure-sensitive adhesive layer. Alkali metal salts and/or organic cation-anion salts are preferred as ionic compounds.
  • humidification durability can be more of an issue.
  • the antistatic agent is eluted from the conductive pressure-sensitive adhesive layer together with moisture in a humidified environment, adversely affecting the characteristics of the polarizing plate, and possibly corroding the touch panel sensor of the image display device in which the optical laminate is used. be.
  • organic salts and inorganic salts of alkali metals can be used.
  • organic cation-anion salt refers to an organic salt, the cation portion of which is composed of an organic substance, and the anion portion may be an organic substance or an inorganic substance. good. "Organic cation-anion salts" are also referred to as ionic liquids and ionic solids.
  • Alkali Metal Salt Alkali metal ions constituting the cation portion of the alkali metal salt include ions of lithium, sodium, and potassium. Among these alkali metal ions, lithium ions are preferred.
  • the anion portion of the alkali metal salt may be composed of an organic substance or may be composed of an inorganic substance.
  • the anion part constituting the organic salt include CH 3 COO ⁇ , CF 3 COO ⁇ , CH 3 SO 3 ⁇ , CF 3 SO 3 ⁇ , (CF 3 SO 2 ) 3 C ⁇ , C 4 F 9 SO 3 - , C 3 F 7 COO - , (CF 3 SO 2 )(CF 3 CO)N - , -O 3 S(CF 2 ) 3 SO 3 - , PF 6 - , CO 3 2- , or the following general formula ( 1) to (4), (1): (C n F 2n+1 SO 2 ) 2 N ⁇ (n is an integer of 1 to 10), (2): CF 2 (C m F 2m SO 2 ) 2 N ⁇ (m is an integer of 1 to 10), (3): —O 3 S(CF 2 ) l SO 3 — (l is an integer of 1 to 10), (4):
  • anion moiety constituting the inorganic salt examples include Cl ⁇ , Br ⁇ , I ⁇ , AlCl 4 ⁇ , Al 2 Cl 7 ⁇ , BF 4 ⁇ , PF 6 ⁇ , ClO 4 ⁇ , NO 3 ⁇ , AsF 6 ⁇ , SbF 6 ⁇ , NbF 6 ⁇ , TaF 6 ⁇ , (CN) 2 N ⁇ and the like are used.
  • (CF 3 SO 2 ) 2 N ⁇ , (C 2 F 5 SO 2 ) 2 N ⁇ and other (perfluoroalkylsulfonyl) imides represented by the above general formula (1) are preferred, and (CF 3 SO 2 ) ( Trifluoromethanesulfonyl )imide represented by 2N- is more preferred.
  • alkali metal organic salts include sodium acetate, sodium alginate, sodium ligninsulfonate, sodium toluenesulfonate, LiCF 3 SO 3 , Li(CF 3 SO 2 ) 2 N, Li(CF 3 SO 2 ) 2N , Li( C2F5SO2 ) 2N , Li( C4F9SO2 ) 2N , Li ( CF3SO2 ) 3C , KO3S ( CF2 ) 3SO3K , LiO3S ( CF2 ) 3SO3K etc. are mentioned.
  • LiCF3SO3 Li( CF3SO2 ) 2N , Li ( C2F5SO2 ) 2N , Li ( C4F9SO2 ) 2N , Li ( CF3SO2 ) 3 C is preferred
  • fluorine-containing lithium imide salts such as Li(CF 3 SO 2 ) 2 N, Li(C 2 F 5 SO 2 ) 2 N, Li(C 4 F 9 SO 2 ) 2 N are more preferred, and (perfluoro Alkylsulfonyl)imide lithium salts are particularly preferred.
  • Inorganic salts of alkali metals include lithium perchlorate and lithium iodide.
  • Organic Cation-Anion Salt is composed of a cation component and an anion component, and the cation component is composed of an organic substance.
  • cationic components include pyridinium cations, piperidinium cations, pyrrolidinium cations, cations having a pyrroline skeleton, cations having a pyrrole skeleton, imidazolium cations, tetrahydropyrimidinium cations, dihydropyrimidinium cations, Examples include pyrazolium cations, pyrazolinium cations, tetraalkylammonium cations, trialkylsulfonium cations, tetraalkylphosphonium cations, and the like.
  • anion components include Cl ⁇ , Br ⁇ , I ⁇ , AlCl 4 ⁇ , Al 2 Cl 7 ⁇ , BF 4 ⁇ , PF 6 ⁇ , ClO 4 ⁇ , NO 3 ⁇ , CH 3 COO ⁇ , and CF 3 COO.
  • ionic compounds include inorganic salts such as ammonium chloride, aluminum chloride, copper chloride, ferrous chloride, ferric chloride, and ammonium sulfate, in addition to the above alkali metal salts and organic cation-anion salts. These ionic compounds can be used alone or in combination.
  • the antistatic agent is used in any suitable amount so that the surface resistance value of the conductive pressure-sensitive adhesive layer is 1 ⁇ 10 7 ⁇ / ⁇ to 1 ⁇ 10 10 ⁇ / ⁇ .
  • the antistatic agent is preferably 5 parts by weight to 50 parts by weight, more preferably 8 parts by weight to 45 parts by weight, still more preferably 10 parts by weight to 40 parts by weight with respect to 100 parts by weight of the base polymer. .
  • the antistatic agent is within the above range, it is possible to form a conductive pressure-sensitive adhesive layer having a surface resistance value of 1 ⁇ 10 7 ⁇ / ⁇ to 1 ⁇ 10 10 ⁇ / ⁇ even when the thickness is thin. can.
  • the antistatic agent may be eluted from the conductive pressure-sensitive adhesive layer together with moisture in a humid environment, corroding the touch panel sensor in the image display device using the polarizing plate and the optical laminate. be.
  • humidification durability can be more of an issue.
  • INDUSTRIAL APPLICABILITY According to the optical layered body of the embodiment of the present invention, it is possible to provide an optical layered body which is excellent in humidification durability even when the content of the antistatic agent is large.
  • the pressure-sensitive adhesive composition may further contain a cross-linking agent.
  • a cross-linking agent can be used according to the base polymer.
  • an organic cross-linking agent or a polyfunctional metal chelate can be used as the cross-linking agent.
  • organic cross-linking agents include isocyanate-based cross-linking agents, peroxide-based cross-linking agents, epoxy-based cross-linking agents, and imine-based cross-linking agents.
  • Polyfunctional metal chelates are those in which polyvalent metals are covalently or coordinately bonded to organic compounds.
  • Polyvalent metal atoms include Al, Cr, Zr, Co, Cu, Fe, Ni, V, Zn, In, Ca, Mg, Mn, Y, Ce, Sr, Ba, Mo, La, Sn, and Ti. mentioned. Atoms in the organic compound that are covalently or coordinately bonded include oxygen atoms, and the organic compounds include alkyl esters, alcohol compounds, carboxylic acid compounds, ether compounds, ketone compounds, and the like.
  • the content of the cross-linking agent is preferably 3 parts by weight or less, more preferably 0.01 to 3 parts by weight, still more preferably 0.02 to 2 parts by weight with respect to 100 parts by weight of the (meth)acrylic polymer. Part by weight, particularly preferably 0.03 to 1 part by weight.
  • the adhesive composition may further comprise any suitable additive.
  • silane coupling agents polyether compounds of polyalkylene glycols such as polypropylene glycol, powders such as colorants and pigments, dyes, surfactants, plasticizers, tackifiers, surface lubricants, and leveling agents.
  • Agents, softeners, antioxidants, antioxidants, light stabilizers, ultraviolet absorbers, polymerization inhibitors, inorganic or organic fillers, metal powders, particles, foils, and the like can be used.
  • a redox system with a reducing agent added may be employed within a controllable range.
  • These additives are preferably used in an amount of 5 parts by weight or less, more preferably 3 parts by weight or less, and even more preferably 1 part by weight or less based on 100 parts by weight of the (meth)acrylic polymer.
  • the moisture-proof layer any suitable film having a moisture permeability of 20 g/m 2 ⁇ 24h to 500 g/m 2 ⁇ 24h can be used.
  • the thickness of the moisture-proof layer can be set to any appropriate value as long as it has the above moisture permeability.
  • the thickness of the moisture-proof layer can be set according to the material forming the moisture-proof layer.
  • the thickness of the moisture-proof layer is preferably 10 ⁇ m to 100 ⁇ m, more preferably 15 ⁇ m to 90 ⁇ m, still more preferably 20 ⁇ m to 80 ⁇ m.
  • the moisture barrier can also preferably function as a protective layer or a retardation layer.
  • the moisture barrier can act as a protective layer.
  • a moisture-proof layer that can function as a protective layer, when the optical layered body is used in an image display device, constituent members of the image display device such as a touch sensor can be appropriately protected.
  • materials constituting the protective layer that functions as a moisture-proof layer include cellulose resins such as triacetyl cellulose, cycloolefin resins such as polynorbornene, (meth)acrylic resins, polyethylene terephthalate (PET), and polyethylene.
  • polyester resins such as naphthalate (PEN), polyolefin resins such as polyethylene, and polycarbonate resins.
  • a representative example of the (meth)acrylic resin is a (meth)acrylic resin having a lactone ring structure.
  • (Meth) acrylic resins having a lactone ring structure for example, JP-A-2000-230016, JP-A-2001-151814, JP-A-2002-120326, JP-A-2002-254544, JP-A-2005 -146084. These publications are incorporated herein by reference.
  • the moisture barrier can function as a retardation layer.
  • the optical functional layer can be omitted, and a thin optical laminate can be obtained.
  • a retardation layer that can function as a moisture barrier is, for example, a single layer.
  • the retardation layer When the retardation layer is a single layer, the retardation layer can typically function as a ⁇ /4 plate.
  • a retardation layer is typically provided to impart antireflection properties to an image display device.
  • the in-plane retardation Re(550) of the retardation layer is preferably 100 nm to 190 nm, more preferably 110 nm to 170 nm, still more preferably 120 nm to 160 nm.
  • the Nz coefficient of the retardation layer is preferably 0.9 to 1.5, more preferably 0.9 to 1.3. By satisfying such a relationship, it is possible to obtain an organic EL display device having a very excellent reflective hue.
  • the retardation layer When the retardation layer is a single layer, the retardation layer preferably exhibits reverse dispersion wavelength characteristics in which the retardation value increases according to the wavelength of the measurement light.
  • Re(450)/Re(550) of the retardation layer is preferably 0.8 or more and less than 1, more preferably 0.8 or more and 0.95 or less. With such a configuration, very excellent antireflection properties can be achieved.
  • the angle between the slow axis of the retardation layer and the absorption axis of the polarizer is preferably 40° to 50°, more preferably 42° to 48°, still more preferably about 45°. If the angle is within such a range, an organic EL display device having extremely excellent antireflection properties can be obtained by using a ⁇ /4 plate as the retardation layer as described above.
  • the retardation layer can be made of any suitable material as long as it can satisfy the properties described above.
  • the retardation layer is a stretched resin film.
  • the retardation layer is a stretched film of a resin film
  • typical examples of the resin constituting the resin film include polycarbonate-based resins or polyester carbonate-based resins (hereinafter sometimes simply referred to as polycarbonate-based resins). Any appropriate polycarbonate-based resin can be used as the polycarbonate-based resin as long as the desired moisture permeability can be obtained.
  • a polycarbonate-based resin includes a structural unit derived from a fluorene-based dihydroxy compound, a structural unit derived from an isosorbide-based dihydroxy compound, an alicyclic diol, an alicyclic dimethanol, di-, tri- or polyethylene glycol, and an alkylene and a structural unit derived from at least one dihydroxy compound selected from the group consisting of glycols or spiroglycols.
  • the polycarbonate-based resin contains a structural unit derived from a fluorene-based dihydroxy compound, a structural unit derived from an isosorbide-based dihydroxy compound, a structural unit derived from an alicyclic dimethanol, and/or di-, tri- or polyethylene glycol.
  • a structural unit derived from a fluorene-based dihydroxy compound More preferably, a structural unit derived from a fluorene-based dihydroxy compound, a structural unit derived from an isosorbide-based dihydroxy compound, and a structural unit derived from di-, tri- or polyethylene glycol.
  • the polycarbonate-based resin may contain structural units derived from other dihydroxy compounds as necessary.
  • the retardation layer can be formed by stretching a film composed of a polycarbonate-based resin as described above under any appropriate stretching conditions.
  • the thickness of the retardation layer can typically be set to a thickness that can exhibit a moisture-proof function and that can function appropriately as a ⁇ /4 plate.
  • an image display device In one embodiment of the present invention, an image display device is provided.
  • This image display device has the optical laminate and a touch panel in this order from the viewing side.
  • corrosion of the touch panel sensor due to elution of the antistatic agent in a humid environment can be a problem.
  • the optical layered body of the embodiment of the present invention has excellent antistatic performance and excellent humidification durability. Therefore, it can be suitably used for an image display device having a touch panel.
  • the image display device may be a liquid crystal display device or an organic electroluminescence display device. Moreover, it may be an in-cell type or an on-cell type. When the liquid crystal display device is a liquid crystal display device, it is preferably an in-cell image display device. When the liquid crystal display device is an organic electroluminescence display device, it is preferably an on-cell image display device.
  • FIG. 2 is a schematic cross-sectional view of an image display device according to an embodiment of the invention.
  • This image display 300 is an in-cell liquid crystal display device.
  • the in-cell liquid crystal cell 200 includes a liquid crystal layer 90 containing liquid crystal molecules that are homogeneously aligned in the absence of an electric field, and a first transparent substrate 71 and a second transparent substrate 72 that sandwich the liquid crystal layer 90 on both sides.
  • a touch sensor section 61 is provided between the liquid crystal layer 90 and the first transparent substrate 71
  • a driving electrode/sensor section 62 is provided between the liquid crystal layer 50 and the second transparent substrate 72 .
  • the in-cell liquid crystal cell has a touch sensor portion 61 and a driving electrode/sensor portion 62 inside the liquid crystal cell, and does not have a touch sensor portion outside the liquid crystal cell. That is, no conductive layer (having a surface resistance of 1 ⁇ 10 13 ⁇ / ⁇ or less) is provided on the viewing side of the first transparent substrate 41 of the in-cell liquid crystal cell.
  • the touch sensor section 61 is arranged between the polarizing plate 10 and the liquid crystal layer 90, and can usually be formed on the first transparent substrate 71 as a transparent electrode pattern.
  • a transparent electrode pattern can also be formed on the drive electrode/sensor portion 62 by any appropriate method.
  • the transparent electrode pattern is normally electrically connected to a lead wire (not shown) formed at the end of the transparent substrate, and the lead wire is connected to a controller IC (not shown).
  • the shape of the transparent electrode pattern any shape such as a stripe shape, a rhombus shape, or the like can be adopted in addition to the comb shape, depending on the application.
  • the height of the transparent electrode pattern is, for example, 10 nm to 100 nm, and the width is 0.1 mm to 5 mm.
  • a conductive structure 51 can be provided on the side surface of at least one layer of the optical laminate 100 .
  • the conductive structure 51 connects the side surface of at least one layer of the optical layered body 100 to another suitable location, thereby suppressing the generation of static electricity.
  • Materials forming the conductive structure 51 include conductive pastes such as silver, gold or other metal pastes, conductive adhesives, or any other suitable conductive material may be used.
  • the conductive structure 51 can also be formed in a linear shape extending from the side surface of at least one layer of the optical layered body 100 .
  • Example 1 Production of Polarizer
  • a thermoplastic resin substrate a long amorphous isophthalic copolymerized polyethylene terephthalate film (thickness: 100 ⁇ m) having a water absorption of 0.75% and a Tg of about 75° C. was used. Corona treatment was applied to one side of the resin substrate.
  • Polyvinyl alcohol degree of polymerization: 4,200, degree of saponification: 99.2 mol% and acetoacetyl-modified PVA (manufactured by Nippon Synthetic Chemical Industry Co., Ltd., trade name "GOSEFIMER Z410") mixed at 9:1: 100 weight of PVA-based resin 13 parts by weight of potassium iodide was added to parts by weight, and dissolved in water to prepare an aqueous PVA solution (coating solution). The above PVA aqueous solution was applied to the corona-treated surface of the resin base material and dried at 60° C. to form a PVA-based resin layer having a thickness of 13 ⁇ m, thereby producing a laminate.
  • the obtained laminate was uniaxially stretched 2.4 times at the free end in the machine direction (longitudinal direction) between rolls with different peripheral speeds in an oven at 130° C. (in-air auxiliary stretching treatment).
  • the laminate was immersed in an insolubilizing bath (an aqueous boric acid solution obtained by mixing 4 parts by weight of boric acid with 100 parts by weight of water) at a liquid temperature of 40° C. for 30 seconds (insolubilizing treatment).
  • the finally obtained polarizing film is placed in a dyeing bath (iodine aqueous solution obtained by blending iodine and potassium iodide at a weight ratio of 1:7 with respect to 100 parts by weight of water) at a liquid temperature of 30 ° C.
  • HC-TAC film was attached to the surface of the polarizer of the resin substrate/polarizer laminate obtained above via an ultraviolet curable adhesive. Specifically, the curable adhesive was applied so as to have a thickness of 1.0 ⁇ m, and was bonded using a roll machine. After that, UV light was applied from the HC-TAC film side to cure the adhesive.
  • the HC-TAC film is a film in which a hard coat (HC) layer (thickness: 7 ⁇ m) is formed on a triacetyl cellulose (TAC) film (cellulose ester resin film, manufactured by Konica Minolta, trade name: KC2UA). , the TAC film was on the polarizer side.
  • conductive adhesive layer 3-1 Preparation of conductive adhesive layer 3-1.
  • acrylic polymer 74.8 parts of butyl acrylate, 23 parts of phenoxyethyl acrylate, N-vinyl-2-pyrrolidone (NVP) were placed in a four-necked flask equipped with a stirring blade, a thermometer, a nitrogen gas inlet tube, and a condenser. A monomer mixture containing 0.5 parts, 0.3 parts acrylic acid, and 0.4 parts 4-hydroxybutyl acrylate was charged.
  • conductive pressure-sensitive adhesive composition The conductive material (ionic compound) shown in Table 1 was blended in the content shown in Table 1 with respect to 100 parts of the solid content of the acrylic polymer solution obtained above.
  • an isocyanate cross-linking agent Takenate D160N, trimethylolpropane hexamethylene diisocyanate manufactured by Mitsui Chemicals
  • benzoyl peroxide Niper BMT manufactured by NOF Corporation
  • ⁇ -glycidoxypropyl methoxy 0.2 part of silane manufactured by Shin-Etsu Chemical Co., Ltd.: KBM-403
  • a solution of the acrylic pressure-sensitive adhesive composition is applied to one side of a polyethylene terephthalate film (release liner: MRF38, manufactured by Mitsubishi Chemical Polyester Film Co., Ltd.) treated with a silicone release agent, and the pressure-sensitive adhesive layer after drying. It was applied to a thickness shown in Table 1 and dried at 155° C. for 1 minute to form a conductive pressure-sensitive adhesive layer on the surface of the release liner. Then, the resin substrate was peeled off, and the conductive pressure-sensitive adhesive layer was transferred to the peeled surface.
  • release liner MRF38, manufactured by Mitsubishi Chemical Polyester Film Co., Ltd.
  • moisture-proof layer 1 (retardation film) 4-1.
  • Polymerization of polyester carbonate-based resin Polymerization was carried out using a batch polymerization apparatus consisting of two vertical reactors equipped with a stirring blade and a reflux condenser controlled at 100°C.
  • the resulting moisture-proof layer was laminated on the conductive adhesive layer to obtain an optical laminate.
  • the obtained optical layered body, and the conductive pressure-sensitive adhesive layer and the moisture-proof layer used in the optical layered body were subjected to the above evaluations (2) to (5). Table 1 shows the results.
  • Example 2 to 4 An optical laminate was obtained in the same manner as in Example 1, except that the type and content of the antistatic agent used were as shown in Table 1.
  • the obtained optical layered body, and the conductive pressure-sensitive adhesive layer and the moisture-proof layer used in the optical layered body were subjected to the above evaluations (2) to (5).
  • Table 1 shows the results.
  • Example 5-8 The moisture-proof layer 2 (cellulose ester resin film, manufactured by Konica Minolta, trade name: KC8UY) was used instead of the moisture-proof layer 1, and the type and content of the antistatic agent used are shown in Table 1.
  • An optical layered body was obtained in the same manner as in Example 1 except that the optical layered body was obtained.
  • the obtained optical layered body, and the conductive pressure-sensitive adhesive layer and the moisture-proof layer used in the optical layered body were subjected to the above evaluations (2) to (5). Table 1 shows the results.
  • Example 9-12 Except that the moisture-proof layer 3 (acrylic resin film having a lactone ring structure) was used instead of the moisture-proof layer 1, and the type and content of the antistatic agent used were as described in Table 1.
  • An optical laminate was obtained in the same manner as in Example 1. The obtained optical layered body, and the conductive pressure-sensitive adhesive layer and the moisture-proof layer used in the optical layered body were subjected to the above evaluations (2) to (5). Table 1 shows the results.
  • Examples 13-16 Same as Example 1, except that a moisture-proof layer 4 (cycloolefin resin film) was used instead of the moisture-proof layer 1, and the type and content of the antistatic agent used were as shown in Table 1. Then, an optical laminate was obtained. The obtained optical layered body, and the conductive pressure-sensitive adhesive layer and the moisture-proof layer used in the optical layered body were subjected to the above evaluations (2) to (5). Table 1 shows the results.
  • a moisture-proof layer 4 cycloolefin resin film
  • the moisture-proof layer 5 (cellulose ester resin film, manufactured by Konica Minolta, trade name: KC2UA) was used instead of the moisture-proof layer 1, and the type and content of the antistatic agent used are shown in Table 2.
  • An optical layered body was obtained in the same manner as in Example 1 except that the optical layered body was obtained.
  • the obtained optical layered body, and the conductive pressure-sensitive adhesive layer and the moisture-proof layer used in the optical layered body were subjected to the above evaluations (2) to (5). Table 2 shows the results.
  • Table 2 shows the use of a moisture-proof layer 6 (cellulose ester resin film, manufactured by Konica Minolta, trade name: KC4UA) instead of the moisture-proof layer 1, and the type and content of the antistatic agent used.
  • An optical layered body was obtained in the same manner as in Example 1 except that the optical layered body was obtained.
  • the obtained optical layered body, and the conductive pressure-sensitive adhesive layer and the moisture-proof layer used in the optical layered body were subjected to the above evaluations (2) to (5). Table 2 shows the results.
  • Example 15 In the manufacturing process of the polarizing plate, the resin base material is peeled off, the moisture-proof layer 4 is attached to the peeled surface, and the configuration of the viewing side protective layer (HC-TAC film) / polarizer / another protective layer (COP film) is formed.
  • a polarizing plate having Optical lamination was carried out in the same manner as in Example 1, except that this polarizing plate was used, no moisture-proof layer was laminated, and the type and content of the antistatic agent used were as shown in Table 2. got a body The obtained optical layered body, and the conductive pressure-sensitive adhesive layer and the moisture-proof layer used in the optical layered body were subjected to the above evaluations (2) to (5). Table 2 shows the results.
  • optical laminate of the present invention is suitably used for image display devices such as liquid crystal display devices and organic electroluminescence devices having touch panels.

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  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Organic Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Polarising Elements (AREA)
  • Liquid Crystal (AREA)
  • Laminated Bodies (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

L'invention concerne un stratifié optique qui présente d'excellentes performances antistatiques et une excellente durabilité d'humidification, et un dispositif d'affichage d'image qui utilise le stratifié optique. Un stratifié optique selon la présente invention comprend : une plaque de polarisation qui comprend un polariseur et une couche de protection qui est disposée sur au moins le côté de visualisation du polariseur ; une couche adhésive conductrice ; et une couche résistante à l'humidité dans cet ordre à partir du côté de visualisation, la valeur de résistance de surface de la couche adhésive conductrice étant de 1×107Ω/□ à 1×1010 Ω/□ et la perméabilité à l'humidité de la couche résistante à l'humidité étant de 20 à 500 g/m2·24h<sp />.
PCT/JP2022/025964 2021-09-13 2022-06-29 Stratifié optique et dispositif d'affichage d'image l'utilisant WO2023037721A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0651121A (ja) * 1992-07-29 1994-02-25 Nitto Denko Corp 偏光板及び楕円偏光板
JP2017095717A (ja) * 2012-02-10 2017-06-01 住友化学株式会社 粘着剤シート、粘着剤付き光学フィルム、光学積層体及び粘着剤シートの製造方法
JP2017122136A (ja) * 2015-03-19 2017-07-13 日本化薬株式会社 樹脂組成物
JP2020173430A (ja) * 2014-09-19 2020-10-22 日東電工株式会社 偏光板

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5896692B2 (ja) 2011-11-16 2016-03-30 日東電工株式会社 入力表示装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0651121A (ja) * 1992-07-29 1994-02-25 Nitto Denko Corp 偏光板及び楕円偏光板
JP2017095717A (ja) * 2012-02-10 2017-06-01 住友化学株式会社 粘着剤シート、粘着剤付き光学フィルム、光学積層体及び粘着剤シートの製造方法
JP2020173430A (ja) * 2014-09-19 2020-10-22 日東電工株式会社 偏光板
JP2017122136A (ja) * 2015-03-19 2017-07-13 日本化薬株式会社 樹脂組成物

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