WO2021200364A1 - Corps multicouche - Google Patents

Corps multicouche Download PDF

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Publication number
WO2021200364A1
WO2021200364A1 PCT/JP2021/011867 JP2021011867W WO2021200364A1 WO 2021200364 A1 WO2021200364 A1 WO 2021200364A1 JP 2021011867 W JP2021011867 W JP 2021011867W WO 2021200364 A1 WO2021200364 A1 WO 2021200364A1
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WO
WIPO (PCT)
Prior art keywords
layer
film
thickness
less
sensitive adhesive
Prior art date
Application number
PCT/JP2021/011867
Other languages
English (en)
Japanese (ja)
Inventor
▲ビョン▼▲フン▼ 宋
柱烈 張
承柏 洪
Original Assignee
住友化学株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2021039492A external-priority patent/JP2021162855A/ja
Application filed by 住友化学株式会社 filed Critical 住友化学株式会社
Priority to CN202180025443.4A priority Critical patent/CN115349100A/zh
Priority to KR1020227027609A priority patent/KR20220159358A/ko
Publication of WO2021200364A1 publication Critical patent/WO2021200364A1/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
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10339—Specific parts of the laminated safety glass or glazing being colored or tinted
    • 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
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10431—Specific parts for the modulation of light incorporated into the laminated safety glass or glazing
    • B32B17/1044—Invariable transmission
    • B32B17/10458—Polarization selective transmission
    • 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
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/022—Mechanical properties
    • 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
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/023—Optical properties
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • 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
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • 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
    • H10K50/00—Organic light-emitting devices
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/42—Polarizing, birefringent, filtering
    • 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
    • B32B2331/00—Polyvinylesters
    • B32B2331/04—Polymers of vinyl acetate, e.g. PVA
    • 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
    • B32B2379/00—Other polymers having nitrogen, with or without oxygen or carbon only, in the main chain
    • B32B2379/08—Polyimides
    • 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
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • B32B2457/202—LCD, i.e. liquid crystal displays
    • 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
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • B32B2457/206—Organic displays, e.g. OLED
    • 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
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • B32B2457/208—Touch screens

Definitions

  • the present invention relates to a laminated body and further to an image display device including the laminated body.
  • a display device such as a liquid crystal display device or an organic electroluminescence (EL) display device is provided with a colored layer on the outer edge portion in order to prevent the electrode portion and the like from being visually recognized (Patent Document 1).
  • EL organic electroluminescence
  • a laminated body provided with a front plate, a first bonding layer, a coloring member, a second bonding layer, and a circularly polarizing plate in this order, cracks occur in the coloring member when repeated bending is performed with the front plate side inside. There was something. Further, when the appearance of the laminated body is visually observed from the front plate side, rainbow-colored unevenness (hereinafter, also referred to as rainbow unevenness) may be visually recognized due to light interference.
  • An object of the present invention is a laminated body including a front plate, a first bonding layer, a coloring member, a second bonding layer, and a circularly polarizing plate in this order, and the front plate side is turned inside and repeated bending is performed.
  • the present invention provides the following laminate and image display device.
  • the front plate, the first bonding layer, the coloring member, the second bonding layer, and the circularly polarizing plate are included in this order.
  • the ratio Ta / Tb of the thickness Ta of the first bonded layer to the thickness Tb of the second bonded layer is 0.03 or more and less than 50.
  • the laminate according to [1] or [2], wherein the storage elastic modulus G'a of the first bonded layer at a temperature of 25 ° C. is 0.01 MPa or more and 5 MPa or less.
  • the coloring member includes a coloring layer and a separation layer.
  • An image display device comprising the laminate according to any one of [1] to [5].
  • the laminate is provided with a front plate, a first bonding layer, a coloring member, a second bonding layer, and a circular polarizing plate in this order, and is repeatedly bent with the front plate side inside.
  • a laminated body in which cracks are less likely to occur in the colored member and rainbow unevenness is less likely to be observed when the appearance of the laminated body is visually observed from the front plate side.
  • the laminated body of the present invention will be described with reference to FIG.
  • the laminated body 100 shown in FIG. 1 includes a front plate 110, a first bonded layer 120, a coloring member 130, a second bonded layer 140, and a circularly polarizing plate 150 in this order.
  • the first bonding layer 120 and the coloring member 130 are laminated in contact with each other.
  • the second bonding layer 140 and the coloring member 130 are laminated in contact with each other.
  • the laminated body 100 may further have a bonding layer and a touch sensor layer, which will be described later.
  • the laminated body 100 can be bent (hereinafter, also referred to as infold) with the front plate 110 side inward. Being able to bend means that the laminated body can be bent without causing cracks in the coloring member 130. Bending includes a form of bending in which a curved surface is formed on the bent portion. In the form of bending, the bending radius of the bent inner surface is not particularly limited. Bending also includes a form of refraction in which the bending angle of the inner surface is greater than 0 ° and less than 180 °, and a form of folding in which the bending radius of the inner surface is close to zero or the bending angle of the inner surface is 0 °. ..
  • the laminate of the present invention is suitable for a flexible display because it can be bent.
  • the laminated body 100 tends to be less likely to crack in the colored member 130 when repeatedly bent with the front plate 110 side inside and a bending radius of 1 mm.
  • the number of times that the colored member 130 is first cracked is preferably 200,000 times or more, more preferably 200,000 times or more. It is 300,000 times or more, more preferably 400,000 times or more, and particularly preferably 500,000 times or more.
  • the laminated body 100 satisfies the conditions (A) and (B).
  • Condition (A) The ratio G'a / G'b of the storage elastic modulus G'a of the first bonded layer 120 at a temperature of 25 ° C. to the storage elastic modulus G'b of the second bonded layer 140 at a temperature of 25 ° C. Less than 50.
  • the laminated body 100 tends to be less likely to crack in the colored member 130 when repeatedly bent with the front plate 110 side inside and a bending radius of 1 mm.
  • G'a / G'b is preferably 10 or less, more preferably 5 or less, still more preferably 2 or less, and particularly preferably 1 or less, from the viewpoint that cracks are less likely to occur in the coloring member 130. It may be less than 1.
  • G'a / G'b may be 0.01 or more.
  • the storage elastic moduli G'a and G'b are measured according to the methods described in the Examples section below. The preferable ranges of the storage elastic moduli G'a and G'b will be described later.
  • Ta and Tb are preferably 1.5 ⁇ m or more and 100 ⁇ m or less, and more preferably 5 ⁇ m or more and 50 ⁇ m or less from the viewpoint of making it difficult to observe rainbow unevenness and enhancing flexibility.
  • Ta is, for example, 10 ⁇ m or more and preferably 20 ⁇ m or more, and for example, 100 ⁇ m or less and preferably 80 ⁇ m or less.
  • Tb is, for example, 1.2 ⁇ m or more, preferably 1.5 ⁇ m or more, and for example, 50 ⁇ m or less, preferably 30 ⁇ m or less.
  • the laminated body 100 preferably further satisfies the condition (C) from the viewpoint that cracks are less likely to occur in the colored member 130 when the laminated body 100 is repeatedly bent with the front plate 110 side inside and the bending radius is 1 mm.
  • the ratio Ta / Tb of the thickness Ta of the first bonding layer to the thickness Tb of the second bonding layer is 0.03 or more and less than 50.
  • Ta / Tb is preferably 0.05 or more and 40 or less, more preferably 1 or more and 30 or less, and further preferably 1 or more and 30 or less.
  • the shape of the laminated body 100 in the plane direction is not particularly limited, but it is preferably a square shape, and more preferably a rectangular shape.
  • the length of the long side may be, for example, 50 mm or more and 300 mm or less, preferably 100 mm or more and 280 mm or less, and the length of the short side is, for example, 30 mm or more and 250 mm or less. It is preferably 60 mm or more and 220 mm or less.
  • the laminated body 100 may be a square shape having rounded corners in which at least one of the corners of the square shape is R-processed, or may be a square shape having a notch on at least one side.
  • the laminated body 100 may be provided with a hole portion penetrating in the laminating direction.
  • the thickness of the laminated body 100 varies depending on the function and application required for the laminated body 100, but can be, for example, 20 ⁇ m or more and 2000 ⁇ m or less, preferably 50 ⁇ m or more and 500 ⁇ m or less.
  • the laminated body 100 can be used, for example, in an image display device or the like.
  • the image display device is not particularly limited, and examples thereof include an organic electroluminescence (organic EL) display device, an inorganic electroluminescence (inorganic EL) display device, a liquid crystal display device, and an electroluminescence display device.
  • organic EL organic electroluminescence
  • inorganic EL inorganic electroluminescence
  • liquid crystal display device a liquid crystal display device
  • electroluminescence display device an electroluminescence display device.
  • the laminate 100 includes a circularly polarizing plate 150, it can also be used as an antireflection film in, for example, an organic electroluminescence (EL) display device when applied to an image display device.
  • EL organic electroluminescence
  • the material and thickness of the front plate 110 are not limited as long as it is a plate-like body capable of transmitting light, and the front plate 110 may have a single-layer structure or a multi-layer structure, and is a glass plate-like body (for example, glass). Examples thereof include a plate (plate, glass film, etc.), a resin plate (for example, a resin plate, a resin sheet, a resin film, etc.), and a laminate of a resin plate and a glass plate.
  • the front plate 110 can be a layer forming the outermost surface on the visual side of the image display device.
  • the glass plate tempered glass for display is preferably used.
  • the thickness of the glass plate is, for example, 10 ⁇ m or more and 1000 ⁇ m or less, preferably 20 ⁇ m or more and 500 ⁇ m or less.
  • the front plate 110 can have excellent mechanical strength and surface hardness.
  • the resin film is not limited as long as it is a resin film capable of transmitting light.
  • a resin film capable of transmitting light for example, triacetyl cellulose, acetyl cellulose butyrate, ethylene-vinyl acetate copolymer, propionyl cellulose, butyryl cellulose, acetyl propionyl cellulose, polyester, polystyrene, polyamide, polyetherimide, poly (meth) acrylic, polyimide, polyether.
  • films formed of polymers such as terephthalate, polyethylene naphthalate, polycarbonate and polyamideimide. These polymers can be used alone or in admixture of two or more.
  • a resin formed of a polymer such as polyimide, polyamide, or polyamide-imide, which has excellent flexibility and can be configured to have high strength and high transparency.
  • Films are preferably used.
  • the (meth) acrylic polymer represents at least one selected from the group consisting of an acrylic polymer and a methacryl polymer. The same applies to other terms with "(meta)".
  • the resin film may be a film in which a hard coat layer is provided on at least one surface of the base film to further improve the hardness.
  • the hard coat layer may be formed on one surface of the base film or may be formed on both surfaces.
  • the image display device described later is a touch panel type image display device, the surface of the front plate 110 serves as a touch surface, so a resin film having a hard coat layer is preferably used.
  • the hard coat layer is, for example, a cured layer of an ultraviolet curable resin.
  • the ultraviolet curable resin examples include (meth) acrylic resin, silicone resin, polyester resin, urethane resin, amide resin, epoxy resin and the like.
  • the hard coat layer may contain additives to improve hardness. Additives are not limited and include inorganic fine particles, organic fine particles, or mixtures thereof.
  • the thickness of the resin film is, for example, 30 ⁇ m or more and 100 ⁇ m or less.
  • the front plate 110 not only has a function of protecting the front surface of the image display device, but may also have a function as a touch sensor, a blue light cut function, a viewing angle adjusting function, and the like.
  • the first bonding layer 120 can be a layer for bonding the front plate 110 and the coloring member 130.
  • the first bonding layer 120 is a layer formed of a pressure-sensitive adhesive or an adhesive.
  • the pressure-sensitive adhesive is also referred to as a pressure-sensitive adhesive.
  • the adhesive refers to an adhesive other than the pressure-sensitive adhesive (pressure-sensitive adhesive), and is clearly distinguished from the pressure-sensitive adhesive.
  • the first bonding layer 120 may be one layer or may be composed of two or more layers, but is preferably one layer.
  • the first bonding layer is preferably an adhesive layer.
  • the pressure-sensitive adhesive forming the first bonding layer 120 is composed of a pressure-sensitive adhesive composition containing a resin such as (meth) acrylic, rubber, urethane, ester, silicone, or polyvinyl ether as a main component. be able to. Among them, a pressure-sensitive adhesive composition using a (meth) acrylic resin having excellent transparency, weather resistance, heat resistance and the like as a base polymer is preferable.
  • the pressure-sensitive adhesive composition may be an active energy ray-curable type or a thermosetting type.
  • Examples of the (meth) acrylic resin (base polymer) used in the pressure-sensitive adhesive composition include butyl (meth) acrylate, ethyl (meth) acrylate, isooctyl (meth) acrylate, and 2- (meth) acrylate.
  • a polymer or copolymer having one or more (meth) acrylic acid esters such as ethylhexyl as a monomer is preferably used. It is preferable that the base polymer is copolymerized with a polar monomer.
  • Examples of the polar monomer include (meth) acrylic acid, 2-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, hydroxyethyl (meth) acrylate, (meth) acrylamide, N, N-.
  • Examples thereof include monomers having a carboxyl group, a hydroxyl group, an amide group, an amino group, an epoxy group and the like, such as dimethylaminoethyl (meth) acrylate and glycidyl (meth) acrylate.
  • the pressure-sensitive adhesive composition may contain only the above-mentioned base polymer, but usually further contains a cross-linking agent.
  • the cross-linking agent is a divalent or higher metal ion that forms a carboxylic acid metal salt with a carboxyl group; a polyamine compound that forms an amide bond with a carboxyl group; poly.
  • Epoxy compounds and polyols that form an ester bond with a carboxyl group; polyisocyanate compounds that form an amide bond with a carboxyl group are exemplified. Of these, polyisocyanate compounds are preferable.
  • the active energy ray-curable pressure-sensitive adhesive composition has a property of being cured by being irradiated with active energy rays such as ultraviolet rays and electron beams, and has adhesiveness even before irradiation with active energy rays. It is a pressure-sensitive adhesive composition having the property of being able to adhere to an adherend such as, etc., and being cured by irradiation with active energy rays to adjust the adhesion force.
  • the active energy ray-curable pressure-sensitive adhesive composition is preferably an ultraviolet-curable type.
  • the active energy ray-curable pressure-sensitive adhesive composition further contains an active energy ray-polymerizable compound in addition to the base polymer and the cross-linking agent. Further, if necessary, a photopolymerization initiator, a photosensitizer, or the like may be contained.
  • the pressure-sensitive adhesive composition includes fine particles for imparting light scattering properties, beads (resin beads, glass beads, etc.), glass fibers, resins other than the base polymer, pressure-sensitive adhesives, fillers (metal powders and other inorganic powders). Etc.), antioxidants, UV absorbers, dyes, pigments, colorants, antifoaming agents, corrosion inhibitors, photopolymerization initiators and other additives can be included.
  • the first bonding layer can be formed by applying an organic solvent diluent of the pressure-sensitive adhesive composition on a substrate and drying the coating film.
  • an organic solvent diluent of the pressure-sensitive adhesive composition When the active energy ray-curable pressure-sensitive adhesive composition is used, a cured product having a desired degree of curing can be obtained by irradiating with active energy rays.
  • the adhesive for example, one or a combination of two or more of water-based adhesives, active energy ray-curable adhesives, and the like can be formed.
  • the water-based adhesive include a polyvinyl alcohol-based resin aqueous solution, a water-based two-component urethane-based emulsion adhesive, and the like.
  • the active energy ray-curable adhesive is an adhesive that cures by irradiating with active energy rays such as ultraviolet rays, and is, for example, an adhesive containing a polymerizable compound and a photopolymerizable initiator, and an adhesive containing a photoreactive resin.
  • Adhesives containing a binder resin and a photoreactive cross-linking agent Adhesives containing a binder resin and a photoreactive cross-linking agent, and the like.
  • the polymerizable compound include photopolymerizable monomers such as a photocurable epoxy monomer, a photocurable acrylic monomer, and a photocurable urethane monomer, and oligomers derived from these monomers.
  • the photopolymerization initiator include compounds containing substances that generate active species such as neutral radicals, anion radicals, and cationic radicals by irradiating them with active energy rays such as ultraviolet rays.
  • the storage elastic modulus G'a of the first bonded layer 120 at a temperature of 25 ° C. may be, for example, 0.01 MPa or more and 5 MPa or less, preferably 0.02 MPa or more and 1 MPa or less, and more preferably 0.03 MPa or more and 0.5 MPa. It is less than or equal to, and may be 0.1 MPa or less.
  • the storage elastic modulus G'a of the first bonded layer 120 can be adjusted, for example, by selecting the material used to form the first bonded layer 120.
  • the coloring member 130 includes a coloring layer in order to shield electrodes, wiring, and the like, and to suppress light leakage from a display unit provided in an image display device.
  • the first bonding layer 120 is laminated in contact with the coloring member 130 on one surface of the coloring member 130, and the second bonding layer 140 is laminated in contact with the coloring member 130 on the other surface of the coloring member 130. Has been done.
  • the coloring member 130 can further include at least one of a separation layer and a protective layer in addition to the coloring layer.
  • the coloring member 130 may include, for example, a protective layer, a coloring layer, and a separation layer in this order, and may include a coloring layer, a protection layer, and a separation layer in this order. ..
  • the coloring member 130 may be laminated so that the coloring layer is closer to the front plate 110 than the separation layer, and the separation layer is closer to the front plate 110 than the coloring layer.
  • the coloring member may include a resin film or glass.
  • a coloring layer is formed on a glass plate via a separation layer, a base material layer (release film) is provided on the coloring layer, and the glass plate is separated from the separation layer to separate the separation layer /. It can be produced by transferring the colored member 130 having the layer structure of the colored layer onto the base material layer.
  • Another base material layer (release film) may be provided on the separation layer obtained by separating and exposing the glass plate. The base material layer is usually removed when the coloring member 130 is incorporated into the laminate 100.
  • the thickness of the coloring member 130 may be, for example, 0.1 ⁇ m or more and 15 ⁇ m or less, preferably 0.5 ⁇ m or more and 10 ⁇ m or less, and more preferably 1 ⁇ m or more and 7 ⁇ m or less.
  • the colored layer can have a shielding property in order to shield electrodes, wiring, and the like, and to suppress light leakage from a display unit provided in an image display device.
  • the shape and color of the colored layer are not limited, and can be appropriately selected depending on, for example, the application and design of the display device using the laminated body.
  • the colored layer may be provided so as to be partially arranged in the plan view of the laminated body, and may be provided, for example, so as to be arranged in the peripheral portion in the plan view of the laminated body.
  • the colored layer may have a single layer structure or a multi-layer structure.
  • the colored layer has a multi-layer structure, at least one of the two or more layers is a colorant-containing layer containing a colorant, and the remaining layer contains the colorant but does not contain the colorant. You may. Examples of the color of the colorant include black, red, white, dark blue, silver, and gold.
  • the color of the colored layer is not particularly limited and may be appropriately selected according to the application, design, etc.
  • Examples of the color of the coloring layer 130 include black, white, red, dark blue, silver, and gold.
  • the thickness of the colored layer may be, for example, 0.1 ⁇ m or more and 5 ⁇ m or less.
  • the thickness of the colored layer is preferably 0.5 ⁇ m or more and 4 ⁇ m or less, more preferably 1 ⁇ m or more and 3 ⁇ m or less, and further preferably 1 ⁇ m or more and 2 ⁇ m or less.
  • the above thickness is the maximum thickness of the colored layer. The thickness of the colored layer is measured by the measuring method described in the column of Examples described later.
  • the optical density of the colored layer may be, for example, 2 or more, preferably 3 or more, more preferably 4 or more, and further preferably 5 or more.
  • the upper limit of the optical density of the colored layer is not particularly limited, but may be, for example, 10 or less, or 7 or less.
  • the colored layer may have an optical density of, for example, 1.8 or more, preferably 2 or more, more preferably 2.5 or more, still more preferably 2.7 or more, per 1 ⁇ m of thickness.
  • the optical density is measured as follows. First, a colored layer is formed on the glass substrate. This sample is set in an optical density measuring instrument (for example, product name: 361T manufactured by X-rite), and the upper light source located on the colored layer side of the sample is turned on to focus on the colored layer of the sample. After turning off the upper light source, the measurement light source located on the substrate side of the sample is turned on, and the optical density is measured with the colored layer as the measurement region.
  • an optical density measuring instrument for example, product name: 361T manufactured by X-rite
  • the colored layer when the colored layer is partially formed, the colored layer can be formed so that the laminated body is distinguished into a display region and a non-display region.
  • the laminate 200 shown in FIG. 2 includes a front plate 110, a first bonding layer 120, a coloring member 130, a second bonding layer 140, and a circularly polarizing plate 150, and the coloring member 130 includes a protective layer 133 and a coloring layer. 131 and the separating layer 132 are included in this order.
  • the laminated body 200 is divided into a display area A and a non-display area B, and the colored layer 131 is provided in the non-display area B.
  • the protective layer 133 of the coloring member 130 and the first bonding layer 120 are laminated in contact with each other, but in another embodiment, either one of the coloring layer and the separation layer of the coloring member 130 or Both and the first bonding layer 120 may be laminated so as to be in contact with each other.
  • FIG. 3 is a schematic top view of the laminated body 200 as viewed from the colored layer side in a plan view.
  • the laminated body 200 is divided into a display area A201 and a non-display area B202.
  • the display area A of the laminated body 200 is an area where the image is visually recognized
  • the non-display area B is an area where the image is not visually recognized. Therefore, it may be required that electrodes, wiring, and the like are arranged in the non-display area B, and that light leakage from a display unit provided in the image display device is suppressed.
  • the colored layer 131 provided in the non-display region B has a concealing property such as electrodes and wiring and a sufficient shielding property to be able to suppress light leakage.
  • the plan view means the view from the thickness direction of the layer.
  • the width W of the colored layer 131 can be, for example, 0.5 mm or more, and is 3 mm or more. It may be 5 mm or more, and usually 80 mm or less, 60 mm or less, 50 mm or less, 30 mm or less, or 20 mm or less. ..
  • the end region of the colored layer 131 of the laminated body 200 on the display region A side may have a tapered portion so that the thickness increases in the direction from the end on the display region A side toward the inside of the colored layer 131. Since the colored layer has a tapered portion, it tends to be easy to suppress the biting of air bubbles when the first bonding layer 120 and the coloring member 130 are bonded to each other.
  • the colored layer 131 can be formed by a photolithography method or the like using an active energy ray-curable resin composition.
  • the composition for forming a colored layer can contain, for example, a colorant, a binder resin, a solvent, and any additive.
  • the composition for forming a colored layer is an active energy ray-curable type, the composition for forming a colored layer further contains an active energy ray-polymerizable compound. Further, if necessary, a photopolymerization initiator, a photosensitizer, or the like may be contained.
  • the colorant examples include carbon black such as acetylene black, iron black, titanium dioxide, zinc flower, petals, chrome vermilion, ultramarine, cobalt blue, yellow lead, titanium yellow and other inorganic pigments; phthalocyanine blue and induslen.
  • Organic pigments or dyes such as blue, isoindolinone yellow, benzidine yellow, quinacridone red, polyazo red, perylene red, aniline black; metal pigments consisting of scaly foil pieces such as aluminum and brass; titanium dioxide-coated mica, basic lead carbonate
  • pearl luster pigments pearl pigments
  • binder resin examples include chlorinated polyolefins (for example, chlorinated polyethylene and chlorinated polypropylene), polyester resins, urethane resins, acrylic resins, vinyl acetate resins, vinyl chloride-vinyl acetate copolymers, and cellulose resins. Be done.
  • the binder resin may be used alone or in combination of two or more.
  • the binder resin may be a heat-polymerizable resin or a photopolymerizable resin.
  • the separation layer 132 has a function for facilitating the separation of the coloring member 130 from the support used in the process of producing the coloring layer 131.
  • the separation layer 132 can be, for example, an inorganic layer or an organic layer. These layers can be formed by a spin coating method, a sputtering method, a vapor deposition method or the like. Examples of the material forming the inorganic layer include silicon oxide. Examples of the material for forming the organic material layer include (meth) acrylic resin compositions, epoxy resin compositions, and polyimide resin compositions.
  • the thickness of the separation layer 132 may be, for example, 0.01 ⁇ m or more and 1 ⁇ m or less, preferably 0.05 ⁇ m or more and 0.5 ⁇ m or less.
  • the protective layer 133 can have a function of protecting the colored layer 131. As shown in FIG. 2, when the protective layer is formed so as to cover the side surface of the colored layer, the protective layer 133 has a function of protecting the colored layer and flattening the step caused by the colored layer 131. Can be done.
  • the protective layer 133 can be an organic layer or an inorganic layer. As the materials for the inorganic layer and the organic layer, the same materials as those shown in the description of the separation layer 132 can be used. These layers can be formed by a spin coating method, a sputtering method, a vapor deposition method or the like.
  • the thickness of the protective layer 133 may be, for example, 0.1 ⁇ m or more and 10 ⁇ m or less, preferably 0.5 ⁇ m or more and 5 ⁇ m or less.
  • the protective layer may be formed between the separation layer and the coloring layer.
  • the second bonding layer 140 is a layer for bonding the coloring member 130 and the circularly polarizing plate 150. In the laminated body 100, the coloring member 130 and the circularly polarizing plate 150 are joined via the second bonding layer 140.
  • the examples and preferable ranges of the adhesive, the pressure-sensitive adhesive and the pressure-sensitive adhesive composition constituting the second bonding layer 140, the examples and the preferable ranges in the description of the first bonding layer 120 are applied.
  • the storage elastic modulus G'b of the second bonded layer 140 at a temperature of 25 ° C. may be, for example, 0.01 MPa or more and 5 MPa or less, preferably 0.02 MPa or more and 3 MPa or less, and more preferably 0.03 MPa or more and 1.5 MPa. It may be 0.1 MPa or more, or 0.2 MPa or more.
  • the storage elastic modulus G'a of the second bonded layer 140 can be adjusted, for example, by selecting the material used to form the second bonded layer 140.
  • the second bonding layer is preferably an adhesive layer.
  • the circular polarizing plate 150 may include a linear polarizing plate and a retardation layer, and the linear polarizing plate may be arranged on the first bonding layer 120 side and the retardation layer may be arranged on the second bonding layer 140 side. can.
  • the circularly polarizing plate 150 can convert light (external light) incident through the laminated body 100 from the visual side of the image display device including the laminated body 100 into circularly polarized light. Further, since the circularly polarizing plate 150 can absorb the external light reflected by the display element in the image display device, the laminated body 100 can be provided with a function as an antireflection film.
  • the linear polarizing plate has a function of selectively transmitting linearly polarized light in a certain direction from unpolarized light rays such as natural light.
  • the linear polarizing plate 130 may include a stretched film on which a dichroic dye is adsorbed, a film coated with a composition containing the dichroic dye and a polymerizable compound, and the like as a polarizer.
  • a composition containing a dichroic dye having a liquid crystal property or a composition containing a dichroic dye and a polymerizable liquid crystal is used as the film obtained by applying and curing the composition containing the dichroic dye and the polymerizable compound.
  • a film or the like having a layer obtained by coating and curing can be used.
  • iodine or a dichroic organic dye can be used as the dichroic dye.
  • dichroic organic dyes C.I. I. Included are dichroic direct dyes made of disuazo compounds such as DIRECT RED 39 and dichroic direct dyes made of compounds such as trisazo and tetrakisazo.
  • a film coated with a composition containing a dichroic dye and a polymerizable compound and cured is preferable because there is no limitation in the bending direction as compared with a stretched film on which a dichroic dye is adsorbed.
  • the stretched film on which the dichroic dye is adsorbed is usually a step of uniaxially stretching the polyvinyl alcohol-based resin film and a step of adsorbing the dichroic dye by dyeing the polyvinyl alcohol-based resin film with the dichroic dye.
  • the stretched film produced by the above step on which the dichroic dye is adsorbed may be used as it is as a linear polarizing plate, or may be used as a linear polarizing plate after a transparent protective film is attached to one or both sides thereof. ..
  • the thickness of the polarizer (stretched film on which the dichroic dye is adsorbed) thus obtained is preferably 2 ⁇ m or more and 40 ⁇ m or less.
  • the polyvinyl alcohol-based resin is obtained by saponifying a polyvinyl acetate-based resin.
  • a polyvinyl acetate-based resin in addition to polyvinyl acetate which is a homopolymer of vinyl acetate, a copolymer of vinyl acetate and another monomer copolymerizable therewith is used.
  • examples of other monomers copolymerizable with vinyl acetate include unsaturated carboxylic acids, olefins, vinyl ethers, unsaturated sulfonic acids, and (meth) acrylamides having an ammonium group.
  • the saponification degree of the polyvinyl alcohol-based resin is usually about 85 to 100 mol%, preferably 98 mol% or more.
  • the polyvinyl alcohol-based resin may be modified, and for example, polyvinyl formal, polyvinyl acetal, etc. modified with aldehydes can be used.
  • the degree of polymerization of the polyvinyl alcohol-based resin is usually about 1000 to 10000, preferably in the range of 1500 to 5000.
  • a film of such a polyvinyl alcohol-based resin By forming a film of such a polyvinyl alcohol-based resin, it is possible to obtain a raw film (that is, a polyvinyl alcohol-based resin film) as a material for a polarizer.
  • the method for forming the film of the polyvinyl alcohol-based resin is not particularly limited, and the film can be formed by a known method.
  • the film thickness of the polyvinyl alcohol-based resin film can be, for example, about 10 ⁇ m to 150 ⁇ m.
  • the uniaxial stretching of the polyvinyl alcohol-based resin film can be performed before dyeing with a dichroic dye, at the same time as dyeing, or after dyeing.
  • the uniaxial stretching may be performed before the boric acid treatment or during the boric acid treatment.
  • rolls having different peripheral speeds may be uniaxially stretched, or thermal rolls may be used to uniaxially stretch the rolls.
  • the uniaxial stretching may be a dry stretching in which the stretching is performed in the atmosphere, or a wet stretching in which the polyvinyl alcohol-based resin film is swollen using a solvent.
  • the draw ratio is usually about 3 to 8 times.
  • the thickness of the linear polarizing plate provided with the stretched film as a polarizer may be, for example, 1 ⁇ m or more, 5 ⁇ m or more, or 7 ⁇ m or more.
  • the thickness of the linear polarizing plate provided with the stretched film as a polarizer may be 100 ⁇ m or less, 50 ⁇ m or less, 20 ⁇ m or less, or 10 ⁇ m or less.
  • the material of the transparent protective film to be bonded to one side or both sides of the polarizer is not particularly limited, but for example, a cyclic polyolefin resin film, a cellulose acetate resin film made of a resin such as triacetyl cellulose or diacetyl cellulose, or polyethylene terephthalate. , Polyethylene naphthalate, polyester resin film made of resin such as polybutylene terephthalate, polycarbonate resin film, (meth) acrylic resin film, polypropylene resin film and other films known in the art. .. From the viewpoint of thinning, the thickness of the transparent protective film is usually 300 ⁇ m or less, preferably 200 ⁇ m or less, and more preferably 100 ⁇ m or less. The thickness of the transparent protective film is usually 5 ⁇ m or more, preferably 20 ⁇ m or more. The transparent protective film may or may not have a phase difference.
  • an overcoat layer may be formed on one side or both sides of the polarizer.
  • the overcoat layer can be obtained by applying an adhesive used as a bonding layer described later.
  • the thickness of the overcoat layer is, for example, 10 ⁇ m or less, preferably 5 ⁇ m or less.
  • the thickness of the overcoat layer is, for example, 0.01 ⁇ m or more, preferably 0.1 ⁇ m or more.
  • a linear polarizing plate in which a film obtained by applying and curing a composition containing a dichroic dye and a polymerizable compound serves as a polarizer will be described.
  • a film obtained by applying and curing a composition containing a dichroic dye and a polymerizable compound a composition containing a dichroic dye having a liquid crystal property as described above, or a dichroic dye and a polymerizable liquid crystal may be used.
  • a film having a layer obtained by applying the containing composition on a base film and curing it hereinafter, these are collectively referred to as "film formed from a liquid crystal layer" or the like can be used.
  • An orientation layer may be formed between the base film and the coating layer.
  • the film formed from the liquid crystal layer may be used as a linear polarizing plate by peeling off the base material or used as a linear polarizing plate together with the base material, or may be used as a linear polarizing plate after a transparent protective film is attached to one or both sides thereof. good.
  • the transparent protective film the same material as the transparent protective film in which the above-mentioned stretched film is bonded to a linear polarizing plate serving as a polarizer can be used.
  • the film formed from the liquid crystal layer include the films described in JP2013-37353A, JP2013-33249, and the like.
  • the film formed from the liquid crystal layer is preferably thin, but if it is too thin, the strength tends to decrease and the processability tends to be inferior.
  • the thickness of the film is usually 20 ⁇ m or less, preferably 5 ⁇ m or less, and more preferably 0.5 ⁇ m or more and 3 ⁇ m or less.
  • the thickness of the linear polarizing plate in which the film formed from the liquid crystal layer serves as a polarizer may be, for example, 1 ⁇ m or more and 50 ⁇ m or less.
  • the retardation layer may be one layer or two or more layers.
  • the retardation layer may have an overcoat layer that protects the surface thereof, a base film that supports the retardation layer, and the like.
  • the retardation layer includes a ⁇ / 4 layer, and may further include at least one of a ⁇ / 2 layer and a positive C layer.
  • the retardation layer includes a ⁇ / 2 layer, the ⁇ / 2 layer and the ⁇ / 4 layer are laminated in order from the linear polarizing plate side.
  • the ⁇ / 4 layer and the positive C layer may be laminated in order from the linear polarizing plate side, or the positive C layer and the ⁇ / 4 layer may be laminated in order from the linear polarizing plate side. May be good.
  • the thickness of the retardation layer may be, for example, 0.1 ⁇ m or more and 10 ⁇ m or less, preferably 0.5 ⁇ m or more and 8 ⁇ m or less, and more preferably 1 ⁇ m or more and 6 ⁇ m or less.
  • the retardation layer may be formed from the resin film exemplified as the material of the transparent protective film described above, or may be formed from a layer in which the polymerizable liquid crystal compound is cured.
  • the retardation layer may further include an alignment layer and a base film, and may have a bonding layer described later for bonding the ⁇ / 4 layer, the ⁇ / 2 layer, and the positive C layer. good.
  • the retardation layer When the retardation layer is formed from a layer obtained by curing a polymerizable liquid crystal compound, it can be formed by applying a composition containing the polymerizable liquid crystal compound to a base film and curing it. An orientation layer may be formed between the base film and the coating layer. The material and thickness of the base film may be the same as the material and thickness of the resin film (the transparent protective film).
  • the retardation layer When the retardation layer is formed from a layer obtained by curing a polymerizable liquid crystal compound, the retardation layer may be incorporated into the laminate 100 in the form of having an alignment layer and a base film.
  • the retardation layer can be bonded to the linear polarizing plate via the bonding layer described later.
  • the bonding layer is a layer composed of a pressure-sensitive adhesive or an adhesive.
  • each layer can be bonded in a retardation layer, or a touch sensor panel described later can be bonded to the circularly polarizing plate side of the laminated body.
  • the adhesive or pressure-sensitive adhesive used as the material of the bonding layer the adhesive or pressure-sensitive adhesive exemplified in the description of the first bonding layer 120 can be used.
  • a (meth) acrylic pressure-sensitive adhesive a (meth) acrylic pressure-sensitive adhesive, a styrene-based pressure-sensitive adhesive, a silicone-based pressure-sensitive adhesive, and a rubber-based pressure-sensitive adhesive, which are different from the materials of other pressure-sensitive adhesives, for example, the first bonding layer 120 and the second bonding layer 140.
  • Urethane-based pressure-sensitive adhesives polyester-based pressure-sensitive adhesives, epoxy-based copolymer pressure-sensitive adhesives, and the like can also be used.
  • the thickness of the bonding layer is not particularly limited, but when the pressure-sensitive adhesive layer is used as the bonding layer, it is preferably 10 ⁇ m or more, 15 ⁇ m or more, 20 ⁇ m or more, 25 ⁇ m or more. It may be usually 200 ⁇ m or less, 100 ⁇ m or less, or 50 ⁇ m or less.
  • the thickness of the bonding layer is preferably 0.1 ⁇ m or more, may be 0.5 ⁇ m or more, is preferably 10 ⁇ m or less, and is 5 ⁇ m or less. May be good.
  • the laminated body 100 can further include a touch sensor layer 170 on the circularly polarizing plate 150 side.
  • the touch sensor layer 170 can be laminated on the circularly polarizing plate 150 side via the bonding layer 160.
  • the touch sensor layer 170 may be any method as long as it can detect the position touched by the front plate, which will be described later, and an example thereof includes a capacitance coupling method. Capacitive coupling type touch sensor panels are preferably used because of their low cost and high touch sensitivity.
  • An example of a capacitance coupling type touch sensor panel is composed of a base material layer, a translucent electrode layer for position detection provided on the base material layer, and a touch position detection circuit.
  • a capacitance coupling type touch sensor panel for example, when the surface of the front plate described later is touched, the translucent electrode is grounded via the capacitance of the human body at the touched point. Will be done.
  • the touch position detection circuit detects the grounding of the translucent electrode, and the touched position is detected.
  • the touch sensor layer 170 for example, the above-mentioned resistance film type or capacitance coupling type touch sensor panel is formed on a glass plate via a separation layer, and a base material layer (release film) is provided on the touch sensor panel. Later, the glass plate can be separated from the separation layer to manufacture a touch sensor layer having a layer structure of a touch sensor panel / separation layer. This base material layer is usually removed when the touch sensor layer 170 is incorporated into the laminate 100. Another base material layer can be provided on the separation layer obtained by separating and exposing the glass plate.
  • the touch sensor panel may further include a base material layer, an insulating layer, a protective layer, wiring, and a bonding layer.
  • the surface resistance of the translucent electrode layer can be 90 ⁇ / ⁇ or less.
  • the translucent electrode layer may be a translucent electrode layer made of a metal oxide such as ITO (indium tin oxide), and may be aluminum, copper, silver, gold, palladium or an alloy thereof [for example, silver-palladium-copper alloy]. (APC)] or the like may be a metal layer made of a metal.
  • the translucent electrode layer may be patterned by a photolithography method.
  • the touch sensor layer 170 may have one or more translucent electrode layers.
  • the translucent electrode layer may be a single layer or a multi-layer, and when it is a multi-layer, the materials forming each layer may be the same type or different types. From the viewpoint of translucency and surface resistance, the translucent electrode layer is preferably a patterned ITO film, an APC film, or a film in which these are combined.
  • Base layer examples of the base material layer include a base material film in which a translucent electrode layer is vapor-deposited on one surface, a base film in which a translucent electrode layer is transferred via an adhesive layer, and the like.
  • a structure may be configured in which the separation layer described later is used as the base material layer and does not have another base material film.
  • the base film is not limited as long as it is a resin film capable of transmitting light.
  • cyclic polyolefin resin film cellulose acetate resin film made of resins such as triacetyl cellulose and diacetyl cellulose, polyester resin film made of resins such as polyethylene terephthalate, polyethylene naphthalate and polybutylene terephthalate, and polycarbonate resin.
  • films known in the art such as films, (meth) acrylic resin films, and polypropylene resin films can be mentioned. Of these, a cyclic polyolefin resin film is preferable.
  • the thickness of the base film is usually 300 ⁇ m or less, preferably 200 ⁇ m or less, more preferably 100 ⁇ m or less, and usually 5 ⁇ m or more, preferably 10 ⁇ m or more.
  • the base material layer may be removed from the touch sensor layer 170 after incorporating the translucent electrode layer into the touch sensor layer 170.
  • the separation layer can be a layer formed on a substrate such as a glass plate and for separating the translucent electrode layer 14 formed on the separation layer from the substrate together with the separation layer.
  • the separation layer is preferably an inorganic layer or an organic layer. Examples of the material forming the inorganic layer include silicon oxide.
  • a (meth) acrylic resin composition, an epoxy resin composition, a polyimide resin composition, or the like can be used as the material for forming the organic material layer.
  • the separation layer may be removed together with the substrate so that it is not included in the touch sensor layer 170.
  • the insulating layer can be formed so as to cover the translucent electrode layer 14.
  • the insulating layer can be formed from at least one material selected from the group consisting of curable prepolymers, curable polymers and plastic polymers.
  • the insulating layer can also be formed from a film-forming varnish-type material.
  • the varnish type material may include at least one selected from the group consisting of polysilicone, polyimide, and polyurethane materials.
  • the insulating layer may be an adhesive layer described later.
  • the insulating layer may be patterned by a photolithography method.
  • the insulating layer may be a single layer or a multi-layer, and when the insulating layer is a multi-layer, the materials forming each layer may be the same type or different types.
  • the bonding layer can be a layer formed from the adhesive or adhesive described above.
  • the wiring can be arranged in the touch sensor panel to electrically connect the touch position detection circuit and the translucent electrode layer 14.
  • the wiring can be a pattern of metal films.
  • the metal film can be formed by patterning a metal film obtained by forming a metal such as aluminum, copper, silver, gold, or an alloy thereof by a sputtering method or a vapor deposition method by a photolithography method or an etching method.
  • the wiring can be installed on the translucent electrode layer 14.
  • the laminated body 100 is formed by a method including a step of laminating layers constituting the laminated body 100 via a first laminating layer and a second laminating layer composed of an adhesive layer or an adhesive layer, and a bonding layer. Can be manufactured.
  • a surface activation treatment such as a corona treatment to either or both of the bonded surfaces in order to improve the adhesion.
  • the circularly polarizing plate 150 can also be manufactured by directly forming the linear polarizing plate and the retardation layer forming the circularly polarizing plate 150 on the resin film or the base film as described above.
  • the resin film or the base film may be incorporated into the flexible laminated body 100, or may not be peeled off from the circularly polarizing plate 150 to become a component of the flexible laminated body 100.
  • the coloring member 130 can be manufactured, for example, as follows. First, a separation layer is formed on a support such as a glass plate. Next, a colored layer is formed on the separation layer by a photolithography method using an active energy ray-curable resin composition. A peelable resin film is laminated on the outermost surface on the side opposite to the glass plate side, and the colored layer to the separation layer are transferred to the peelable resin film to separate the glass plate. Then, a peelable resin film is attached to the peeled surface of the glass plate. In the photolithography method, the active energy ray-curable resin composition can be applied to the separation layer, the coating film of the photosensitive resin composition can be exposed, then developed, and then fired. As the exposure light source, a mercury vapor arc, a carbon arc, an Xe arc, or the like that emits light having a wavelength of 250 nm or more and 450 nm or less can be used.
  • the touch sensor layer 170 can be manufactured, for example, as follows. First, a separation layer is formed on the glass plate. A translucent electrode layer, wiring, and an insulating layer are formed on the separation layer in this order. A peelable resin film is laminated on the outermost surface on the side opposite to the glass plate side, and the insulating layer to the separation layer are transferred to the peelable resin film to separate the glass plate. Next, a base material layer is prepared, and the base material layer and the separation layer are bonded together via an adhesive layer. By peeling off the peelable resin film, a touch sensor layer 170 having an insulating layer, wiring, a translucent electrode layer, a separating layer, an adhesive layer, and a base material layer in this order can be obtained. It is also possible to form another translucent electrode layer on the insulating layer and form another insulating layer on the other translucent electrode layer.
  • the image display device includes the above-mentioned laminated body.
  • the image display device is not particularly limited, and examples thereof include an image display device such as an organic EL display device, an inorganic EL display device, a liquid crystal display device, and an electroluminescent display device.
  • the image display device may have a touch panel function.
  • the laminate is suitable for a flexible image display device capable of bending or bending. In the image display device, the laminate is arranged on the visual side of the image display device with the front plate facing the outside (the side opposite to the image display element side, that is, the visual recognition side).
  • the image display device according to the present invention can be used as a mobile device such as a smartphone or tablet, a television, a digital photo frame, an electronic signboard, a measuring instrument or an instrument, an office device, a medical device, a computer device, or the like.
  • the image display device according to the present invention has excellent flexibility and is therefore suitable for a flexible display or the like.
  • FIG. 5 is a diagram schematically showing the method of this evaluation test. As shown in FIG. 5, two individually movable mounting tables 501 and 502 were arranged in the gap C1, and the laminated body 500 was fixedly arranged so that the center in the width direction was located at the center of the gap C. (Fig. 5 (a)). At this time, the laminated body 500 was arranged so that the front plate side was on the upper side.
  • the two mounting tables 501 and 502 are rotated 90 degrees upward with the positions P1 and P2 as the centers of the rotation axes, and a bending force is applied to the region of the laminated body 500 corresponding to the gap C of the mounting tables.
  • the distance C2 between the facing front plates is set to 2.0 mm (FIG. 5 (b)).
  • the two mounting tables 501 and 502 were returned to their original positions (FIG. 5 (a)).
  • the number of times the bending force was applied was counted as one.
  • C A crack occurred when the number of bendings was 300,000 or more and less than 400,000.
  • D The number of bendings was less than 300,000, and cracks occurred. I went as.
  • the measurement was performed using a contact type film thickness measuring device (“MS-5C” manufactured by Nikon Corporation). However, the retardation layer and the alignment layer were measured using a laser microscope (LEXT, manufactured by Olympus Corporation).
  • the measurement sample was placed on a rheometer (Anton Parr, MCR-301), and the storage elastic modulus was measured under the conditions of a temperature of 25 ° C., a relative humidity of 50%, a stress of 1%, and a frequency of 1 Hz.
  • the object of measurement was an adhesive layer
  • the adhesive layers were stacked so as to have a thickness of 150 ⁇ m to prepare a sample for measurement.
  • an adhesive was applied onto the glass so as to have a thickness of 5 ⁇ m, and a plate, which is a rheometer jig, was placed on the adhesive. In this state, the adhesive was cured by heating or irradiating ultraviolet rays from the glass side to prepare a sample for measurement.
  • the weight average molecular weight (Mw) of the (meth) acrylic resin was determined by the following size exclusion chromatography (SEC) using tetrahydrofuran as the mobile phase as the polystyrene-equivalent number average molecular weight (Mn).
  • SEC size exclusion chromatography
  • the (meth) acrylic polymer to be measured was dissolved in tetrahydrofuran at a concentration of about 0.05% by mass, and 10 ⁇ L was injected into SEC.
  • the mobile phase was flowed at a flow rate of 1.0 mL / min.
  • PLgel MIXED-B manufactured by Polymer Laboratories
  • a UV-VIS detector (trade name: Agilent GPC) was used as the detector.
  • Adhesive Sheet 1 A mixed solution of 80 parts of ethyl acetate, 70 parts of butyl acrylate, 20 parts of methyl acrylate, and 1.0 part of acrylic acid is charged in a reactor equipped with a cooling tube, a nitrogen introduction tube, a thermometer, and a stirrer, and is charged with nitrogen gas. The internal temperature was raised to 55 ° C. while replacing the air in the apparatus with oxygen-free. Then, a total amount of a solution prepared by dissolving 0.2 part of a radical polymerization initiator (2,2'-azobisisobutyronitrile) in 10 parts of acetone was added. One hour after the addition of the initiator, the internal temperature was 54 to 56 ° C.
  • a radical polymerization initiator (2,2'-azobisisobutyronitrile
  • the obtained acrylic resin had a weight average molecular weight Mw of 1,500,000 and Mw / Mn of 5.0.
  • a cross-linking agent (“Coronate L” manufactured by Tosoh Corporation) and 0.5 part of a silane coupling agent (“X-12-981” manufactured by Shin-Etsu Chemical Co., Ltd.) are mixed. Ethyl acetate was added so that the total solid content concentration became 10% to obtain a pressure-sensitive adhesive composition.
  • the coating solution of the obtained pressure-sensitive adhesive composition was applied to the release-treated surface of the release-treated polyethylene terephthalate film (release film B) using an applicator so that the thickness after drying was 50 ⁇ m.
  • the coating layer was dried at 100 ° C. for 1 minute to obtain a film having an adhesive layer.
  • another release-treated polyethylene terephthalate film (release film A) was attached onto the exposed surface of the pressure-sensitive adhesive layer. Then, it was cured for 7 days under the conditions of a temperature of 23 ° C. and a relative humidity of 50% RH.
  • the pressure-sensitive adhesive sheet 1 having the structure of the release film B / the pressure-sensitive adhesive layer (thickness 50 ⁇ m) / the release film A was produced.
  • the pressure-sensitive adhesive layer of the pressure-sensitive adhesive sheet 1 is referred to as the pressure-sensitive adhesive layer 1.
  • the storage elastic modulus of the pressure-sensitive adhesive layer 1 at a temperature of 25 ° C. was 0.047 MPa.
  • the obtained acrylic resin had a weight average molecular weight Mw of 1,650,000 and Mw / Mn of 4.1. 100 parts of the obtained acrylic resin (nonvolatile content), 0.2 parts of Coronate L (Tosoh Corporation) as an isocyanate compound, and KBM403 (3-glycidoxypropyltrimethoxysilane, Shin-Etsu Chemical Co., Ltd.) as a silane compound. (Obtained from Co., Ltd.) 0.5 parts were mixed. Ethyl acetate was added so that the total solid content concentration became 10% to obtain a pressure-sensitive adhesive composition.
  • the release film B / adhesive is the same as in the production of the pressure-sensitive adhesive sheet 1, except that the pressure-sensitive adhesive composition is used and the coating solution of the pressure-sensitive adhesive composition is applied so as to have a thickness of 5 ⁇ m after drying.
  • An adhesive sheet 2 having a composition of an agent layer (thickness: 5 ⁇ m) / release film A was prepared.
  • the pressure-sensitive adhesive layer of the pressure-sensitive adhesive sheet 2 is referred to as the pressure-sensitive adhesive layer 2.
  • the storage elastic modulus of the pressure-sensitive adhesive layer 2 at a temperature of 25 ° C. was 0.6 MPa.
  • the release film B / adhesive layer (thickness: 25 ⁇ m) / release film is the same as in the production of the pressure-sensitive adhesive sheet 1, except that the coating solution of the pressure-sensitive adhesive composition is applied so that the thickness after drying is 25 ⁇ m.
  • An adhesive sheet 3 having the configuration of A was produced.
  • the pressure-sensitive adhesive layer of the pressure-sensitive adhesive sheet 3 is referred to as the pressure-sensitive adhesive layer 3.
  • the storage elastic modulus of the pressure-sensitive adhesive layer 3 at a temperature of 25 ° C. was 0.047 MPa.
  • the pressure-sensitive adhesive sheet 4 having the composition of the release film B / the pressure-sensitive adhesive layer (thickness: 1.7 ⁇ m) / the release film A was produced.
  • the pressure-sensitive adhesive layer of the pressure-sensitive adhesive sheet 4 is referred to as the pressure-sensitive adhesive layer 4.
  • the storage elastic modulus of the pressure-sensitive adhesive layer 4 at a temperature of 25 ° C. was 1.5 MPa.
  • Adhesive Sheet 5 81.8 parts of acetone, 70.8 parts of butyl acrylate, 20 parts of methyl methacrylate, 2- (2-phenylethoxy) ethyl acrylate in a reactor equipped with a cooling tube, a nitrogen introduction tube, a thermometer and a stirrer. ) A mixed solution of 8 parts, 1.0 part of 4-hydroxybutyl acrylate and 0.2 part of acrylic acid was prepared, and the internal temperature was raised to 55 ° C. while replacing the air in the apparatus with nitrogen gas to make it oxygen-free. I raised it.
  • the release film B / adhesive is the same as in the production of the pressure-sensitive adhesive sheet 1, except that the pressure-sensitive adhesive composition is used and the coating solution of the pressure-sensitive adhesive composition is applied so as to have a thickness of 50 ⁇ m after drying.
  • An adhesive sheet 5 having a composition of an agent layer (thickness: 50 ⁇ m) / release film A was produced.
  • the pressure-sensitive adhesive layer of the pressure-sensitive adhesive sheet 5 is referred to as the pressure-sensitive adhesive layer 5.
  • the storage elastic modulus of the pressure-sensitive adhesive layer 5 at a temperature of 25 ° C. was 0.136 MPa.
  • thermosetting adhesive A thermosetting adhesive was prepared.
  • the storage elastic modulus of the thermosetting adhesive layer at a temperature of 25 ° C. was 6.8 MPa.
  • UV curable adhesive The following components were mixed and defoamed to prepare a UV curable adhesive.
  • 3', 4'-Epoxycyclohexylmethyl 3,4-epoxycyclohexanecarboxylate (trade name: CEL2021P, manufactured by Daicel Co., Ltd.): 70 parts by mass Neopentyl glycol diglycidyl ether (trade name: EX-211, Nagase ChemteX Co., Ltd.) (Manufactured by the company): 20 parts by mass 2-ethylhexyl glycidyl ether (trade name: EX-121, manufactured by Nagase ChemteX Corporation): 10 parts by mass cationic polymerization initiator (trade name: CPI-100, manufactured by San Apro Co., Ltd.): Solid Quantity 2.25 parts by mass (blended as a 50% propylene carbonate solution) 1,4-Diethoxynaphthalene: 2 parts by mass
  • composition 1 for forming a colored layer A composition for forming an active energy ray-curable colored layer containing carbon black (“CR-BK0951L” manufactured by Samsung SDI Co., Ltd.) was prepared.
  • Example 1 Preparation of front plate
  • a transparent base film polyamideimide film, thickness 40 ⁇ m
  • a hard coat layer a transparent base film (polyamideimide film, thickness 40 ⁇ m) prepared according to Example 4 of JP-A-2018-119141 is coated with the following composition for a hard coat layer, and then the solvent is dried to obtain UV.
  • a front plate thickness 50 ⁇ m
  • a hard coat layer having a thickness of 10 ⁇ m formed on one side of the base film was produced.
  • Composition for forming a hard coat layer 30 parts by mass of multifunctional acrylate (MIWON Specialty Chemical, MIRAMER M340), 50 parts by mass of nanosilica sol (particle size 12 nm, solid content 40%) dispersed in propylene glycol monomethyl ether, ethyl acetate 17 A part by mass, 2.7 parts by mass of a photopolymerization initiator (BASF, I184), and 0.3 parts by mass of a fluorine-based additive (Shinetsu Chemical Industry Co., Ltd., KY1203) are blended using a stirrer to mix polypropylene (PP). Manufactured by filtering with a filter of material.
  • MIWON Specialty Chemical, MIRAMER M340 50 parts by mass of nanosilica sol (particle size 12 nm, solid content 40%) dispersed in propylene glycol monomethyl ether, ethyl acetate 17 A part by mass, 2.7 parts by mass of a photopolymerization initiator (BASF
  • a polyvinyl alcohol (PVA) film having an average degree of polymerization of about 2,400, a saponification degree of 99.9 mol% or more, and a thickness of 20 ⁇ m was prepared. After immersing the PVA film in pure water at 30 ° C, it was immersed in an aqueous solution having a mass ratio of iodine / potassium iodide / water of 0.02 / 2/100 at 30 ° C to perform iodine dyeing (iodine dyeing step). ..
  • the PVA film that had undergone the iodine dyeing step was immersed in an aqueous solution having a mass ratio of potassium iodide / boric acid / water of 12/5/100 at 56.5 ° C. to perform boric acid treatment (boric acid treatment step). ..
  • the PVA film that had undergone the boric acid treatment step was washed with pure water at 8 ° C. and then dried at 65 ° C. to obtain a polarizer in which iodine was adsorbed and oriented on polyvinyl alcohol.
  • the PVA film was stretched in the iodine dyeing step and the boric acid treatment step.
  • the total draw ratio of the PVA film was 5.3 times.
  • the thickness of the obtained polarizer was 7 ⁇ m.
  • the polarizer obtained above and a cycloolefin polymer (COP) film (ZF-14, manufactured by Nippon Zeon Corporation, having an in-plane retardation value of 1 nm at a wavelength of 550 nm) having a thickness of 13 ⁇ m are placed on a nip roll via an aqueous adhesive. I pasted them together. While maintaining the tension of the obtained laminate at 430 N / m, it was dried at 60 ° C. for 2 minutes to obtain a linear polarizing plate having a COP film on one side.
  • COP cycloolefin polymer
  • the water-based adhesive is 100 parts of water, 3 parts of carboxyl group-modified polyvinyl alcohol ("Kuraray Poval KL318", manufactured by Kuraray Co., Ltd.) and water-soluble polyamide epoxy resin ("Smiley's resin 650" (solid content concentration 30%). (Aqueous solution) and 1.5 parts (manufactured by Taoka Chemical Industry Co., Ltd.) were added to prepare.
  • the polarizer side of the linear polarizing plate and the retardation layer were bonded to each other via an acrylic pressure-sensitive adhesive layer having a thickness of 5 ⁇ m.
  • the retardation layer has a thickness of 5 ⁇ m
  • the layer structure includes a ⁇ / 2 layer (thickness 2 ⁇ m) including a layer obtained by curing the liquid crystal compound / a UV curable adhesive layer (thickness 2 ⁇ m) / a layer obtained by curing the liquid crystal compound. It was a ⁇ / 4 layer (thickness 1 ⁇ m). In this way, a circularly polarizing plate (thickness 30 ⁇ m, layer structure: COP film / polarizer / retardation layer) was produced.
  • a glass plate (support) was coated with an acrylic resin to form a separation layer (thickness: 2 ⁇ m).
  • the colored layer is partially (frame-shaped) formed on the separation layer by patterning the colored layer on the separation layer by a photolithography method so that the thickness after drying becomes 1.5 ⁇ m using the composition 1 for forming the colored layer. bottom.
  • the surface on the colored layer side was coated with the composition of Example 1 in JP-A-2016-014877 to form a protective layer (thickness: 2 ⁇ m).
  • a colored member having a layer structure of a protective layer / a colored layer / a separated layer was formed on the support.
  • the release film A was laminated on the protective layer.
  • the release film B was attached to the surface from which the glass plate was peeled off to obtain a colored member laminate having a layer structure of the release film A / coloring member (protective layer / coloring layer / separation layer) / release film B.
  • the photolithography method includes a composition coating step for forming a colored layer, an exposure step, a developing step, and a thermosetting step.
  • a glass plate was coated with an acrylic resin to form a separation layer.
  • a translucent electrode layer was formed on the separation layer, and a touch sensor layer (thickness 7 ⁇ m) composed of the translucent electrode layer and the separation layer was produced.
  • the release film A was laminated on the side of the translucent electrode layer opposite to the separation layer side.
  • the release film B was laminated on the surface from which the glass plate was removed to prepare a touch sensor laminate having a layer structure of the release film A / touch sensor layer / release film B.
  • a colored polyimide film (thickness 50 ⁇ m) was laminated on one surface of the colored polyimide film (thickness 35 ⁇ m) via a bonding layer (thickness 25 ⁇ m) composed of an adhesive layer to prepare a substitute for an organic EL panel (thickness 110 ⁇ m). ..
  • This image display device includes a front plate (thickness 50 ⁇ m), an adhesive layer 1 (thickness 50 ⁇ m), a coloring member (thickness 5.5 ⁇ m), an adhesive layer 2 (thickness 5.0 ⁇ m), a circular polarizing plate (thickness 30 ⁇ m), and the like.
  • a bonding layer composed of an adhesive layer (thickness 25 ⁇ m), a touch sensor layer (thickness 7 ⁇ m), a bonding layer composed of an adhesive layer (thickness 25 ⁇ m), and a substitute for an organic EL panel (thickness 110 ⁇ m) are included in this order, and the total thickness thereof is included.
  • the total thickness thereof is included.
  • the pressure-sensitive adhesive layer 1 was laminated so as to be in contact with the transparent base film of the front plate and the protective layer of the coloring member.
  • the pressure-sensitive adhesive layer 2 was laminated so as to be in contact with the separation layer of the coloring member and the COP film of the circularly polarizing plate. That is, the coloring member has a protective layer, a coloring layer, and a separation layer in this order from the front plate side.
  • a flexibility test and an evaluation of rainbow unevenness were performed on the laminated body. The results are shown in Table 1.
  • Example 2 and 3 A laminate was prepared in the same procedure as in Example 1 except that the pressure-sensitive adhesive sheet was changed so that the second bonding layer became the pressure-sensitive adhesive layer shown in Table 1. A flexibility test and an evaluation of rainbow unevenness were performed on the laminated body. The results are shown in Table 1.
  • Example 1 A laminate was prepared in the same procedure as in Example 1 except that the second bonded layer was cured by irradiating it with ultraviolet rays using a UV curable adhesive. A flexibility test and an evaluation of rainbow unevenness were performed on the laminated body. The results are shown in Table 1.
  • thermosetting adhesive was used for the first bonding layer, and heat treatment was performed at 90 ° C. for 1 hour to perform bonding, and the second bonding layer became the pressure-sensitive adhesive layer shown in Table 1.
  • a laminate was prepared in the same procedure as in Example 1 except that the adhesive sheet was changed to.
  • a flexibility test and an evaluation of rainbow unevenness were performed on the laminated body. The results are shown in Table 1.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Human Computer Interaction (AREA)
  • Mechanical Engineering (AREA)
  • Electroluminescent Light Sources (AREA)
  • Laminated Bodies (AREA)

Abstract

Le but de la présente invention est de fournir un corps multicouche comprenant une plaque de surface avant, une première couche de liaison, un élément coloré, une seconde couche de liaison, et une plaque de polarisation circulaire, dans l'ordre indiqué, dans lequel des fissures ne se forment pas facilement dans l'élément coloré si une flexion répétée est réalisée avec le côté de plaque de surface avant comme côté interne, et lors de l'examen visuel de l'aspect extérieur du corps multicouche à partir du côté de la plaque de surface avant, on ne voit pas facilement une irrégularité de l'irisation. Le corps multicouche comprend la plaque de surface avant, la première couche de liaison, l'élément coloré, la seconde couche de liaison et la plaque de polarisation circulaire, et remplit les conditions (A) et (B). Condition (A): Le rapport G'A/G'b du module de conservation G'a de la première couche de liaison à une température de 25°C au module de conservation G'b de la seconde couche de liaison à une température de 25°C est inférieur à 50. Condition (B): L'épaisseur Ta de la première couche de liaison et l'épaisseur Tb de la seconde couche de liaison sont toutes deux supérieures à 1,0 µm.
PCT/JP2021/011867 2020-03-30 2021-03-23 Corps multicouche WO2021200364A1 (fr)

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JP2010140393A (ja) * 2008-12-15 2010-06-24 Exa Corp 業務処理システム
JP2011074308A (ja) * 2009-10-01 2011-04-14 Three M Innovative Properties Co 透明粘着シート及びそれを含む画像表示装置
JP2015118280A (ja) * 2013-12-18 2015-06-25 大日本印刷株式会社 光学積層体
JP2016001232A (ja) * 2014-06-11 2016-01-07 株式会社ジャパンディスプレイ 液晶表示装置
JP2019131679A (ja) * 2018-01-30 2019-08-08 日東電工株式会社 粘着シートおよびその製造方法、ならびに画像表示装置の製造方法
JP2020019277A (ja) * 2018-07-24 2020-02-06 住友化学株式会社 積層体およびその製造方法
JP2020030395A (ja) * 2018-08-20 2020-02-27 住友化学株式会社 複合前面板及びその製造方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150042046A (ko) 2013-10-10 2015-04-20 삼성전기주식회사 터치센서

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010140393A (ja) * 2008-12-15 2010-06-24 Exa Corp 業務処理システム
JP2011074308A (ja) * 2009-10-01 2011-04-14 Three M Innovative Properties Co 透明粘着シート及びそれを含む画像表示装置
JP2015118280A (ja) * 2013-12-18 2015-06-25 大日本印刷株式会社 光学積層体
JP2016001232A (ja) * 2014-06-11 2016-01-07 株式会社ジャパンディスプレイ 液晶表示装置
JP2019131679A (ja) * 2018-01-30 2019-08-08 日東電工株式会社 粘着シートおよびその製造方法、ならびに画像表示装置の製造方法
JP2020019277A (ja) * 2018-07-24 2020-02-06 住友化学株式会社 積層体およびその製造方法
JP2020030395A (ja) * 2018-08-20 2020-02-27 住友化学株式会社 複合前面板及びその製造方法

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