WO2021140892A1 - Corps stratifié et dispositif d'affichage d'image - Google Patents

Corps stratifié et dispositif d'affichage d'image Download PDF

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Publication number
WO2021140892A1
WO2021140892A1 PCT/JP2020/047605 JP2020047605W WO2021140892A1 WO 2021140892 A1 WO2021140892 A1 WO 2021140892A1 JP 2020047605 W JP2020047605 W JP 2020047605W WO 2021140892 A1 WO2021140892 A1 WO 2021140892A1
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WIPO (PCT)
Prior art keywords
layer
optical member
film
coloring
colored
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PCT/JP2020/047605
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English (en)
Japanese (ja)
Inventor
承柏 洪
▲ビョン▼▲フン▼ 宋
東輝 金
炳默 兪
▲徳▼謙 金
Original Assignee
住友化学株式会社
東友ファインケム株式会社
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Application filed by 住友化学株式会社, 東友ファインケム株式会社 filed Critical 住友化学株式会社
Publication of WO2021140892A1 publication Critical patent/WO2021140892A1/fr

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    • 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
    • H10K59/80—Constructional details
    • H10K59/8791—Arrangements for improving contrast, e.g. preventing reflection of ambient light
    • 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
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/14—Protective coatings, e.g. hard coatings
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/22—Absorbing 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
    • 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
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/02—Details

Definitions

  • the present invention relates to a laminated body and further to an image display device including the laminated body.
  • a touch sensor panel is often mounted on a display device such as a liquid crystal display device or an organic electroluminescence (EL) display device.
  • the touch sensor panel is usually composed of a transparent substrate and an electrode portion of a pad formed by connecting the edges of the substrate. It is known that a colored layer is provided on the outer edge portion in order to prevent the electrode portion of the pad at the end of the sensor from being visually recognized when the display device is used (Japanese Patent Laid-Open No. 2015-076095 (Patent Document 1). )).
  • An object of the present invention is a laminate provided with a first optical member, a coloring member, an adhesive layer, and a polarizing plate, which is repeatedly bent with the first optical member side inside at a temperature of 25 ° C. It is an object of the present invention to provide a laminated body in which cracks are less likely to occur in the colored member in any case where the first optical member side is turned to the outside and repeated bending is performed.
  • the present invention provides the following laminates and an image display device.
  • a first optical member, an adhesive layer, a coloring member, and a polarizing plate are provided.
  • the pressure-sensitive adhesive layer and the coloring member are laminated in contact with each other.
  • the coloring member is a laminated body arranged between the pressure-sensitive adhesive layer and the polarizing plate.
  • the coloring member includes a separation layer, a coloring layer, and a protective layer in this order from the side closer to the first optical member.
  • the coloring member includes a protective layer, a coloring layer, and a separation layer in this order from the side closer to the first optical member.
  • the laminate according to [8] which has a hard coat layer directly under the abrasion resistant layer.
  • the first optical member is a front plate, and is The laminate according to [8] or [9], wherein the wear-resistant layer is formed on the visible side of the front plate.
  • An image display device comprising the laminate according to any one of [1] to [11].
  • a laminated body including a first optical member, a coloring member, an adhesive layer, and a polarizing plate, which is repeatedly bent with the first optical member side inside at a temperature of 25 ° C.
  • the first optical member side is turned to the outside and repeated bending is performed, it is possible to provide a laminated body in which cracks are less likely to occur in the colored member.
  • the laminated body of the present invention will be described with reference to FIG.
  • the laminate 100 shown in FIG. 1 includes a first optical member 110, an adhesive layer 120, a coloring member 130, and a polarizing plate 140 in this order.
  • the pressure-sensitive adhesive layer 120 and the coloring member 130 are laminated in contact with each other. In contact with each other means that the surface of the pressure-sensitive adhesive layer 120 is at least partially in contact with the surface of the coloring member 130.
  • the coloring member 130 is arranged between the pressure-sensitive adhesive layer 120 and the polarizing plate 140.
  • the laminated body 100 may further have a bonding layer between the coloring member 130 and the polarizing plate 140.
  • the laminated body 100 may further have one or more optical members in addition to the first optical member 110.
  • the nth optical member from the visual viewing side in the thickness direction of the laminated body is called the nth optical member.
  • the visible side of the laminated body means the side opposite to the side to be bonded to the image display element of the laminated body when the laminated body is used in the image display device.
  • the laminated body 100 preferably further includes a second optical member, or further includes a second optical member and a third optical member.
  • the laminated body 100 can be bent (hereinafter, also referred to as infold) with the first optical member 110 side inward.
  • the laminated body 100 can be bent (hereinafter, also referred to as outfold) with the first optical member 110 side facing outward.
  • Being able to bend means that the laminate can be bent without causing cracks in the colored member. 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 infold means that the first optical member is bent so as to be inside the central layer in the thickness direction of the laminated body.
  • the outfold means that the first optical member is bent so as to be outward with respect to the central layer in the thickness direction of the laminated body.
  • the pressure-sensitive adhesive layer 120 is laminated in direct contact with the coloring member 130, and the coloring member 130 is arranged between the pressure-sensitive adhesive layer 120 and the polarizing plate 140, so that the temperature is 25 ° C.
  • the first optical member 110 side is on the inside and the bending radius is 1 mm and the bending is repeated, and the first optical member 110 side is on the outside and the bending radius is 3 mm and the bending is repeated.
  • the coloring member 130 tends to be less likely to crack.
  • the number of times of bending at which the colored member 130 first cracks is preferably 200,000 times.
  • the above is more preferably 300,000 times or more, further preferably 400,000 times or more, and particularly preferably 500,000 times or more.
  • the number of times of bending at which the colored member 130 first cracks is preferably 20. It is 10,000 times or more, more preferably 300,000 times or more, further preferably 400,000 times or more, and particularly preferably 500,000 times or more.
  • the laminated body 100 may have, for example, a square shape in a plan view, preferably a square shape having a long side and a short side, and more preferably a rectangle.
  • the length of the long side may be, for example, 10 mm or more and 1400 mm or less, preferably 50 mm or more and 600 mm or less.
  • the length of the short side is, for example, 5 mm or more and 800 mm or less, preferably 30 mm or more and 500 mm or less, and more preferably 50 mm or more and 300 mm or less.
  • Each layer constituting the laminated body 100 may have a corner portion R-processed, an end portion notched, or a perforated portion.
  • the thickness of the laminated body 100 is not particularly limited because it varies depending on the function required for the laminated body, the application of the laminated body, etc. It is as follows.
  • 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 optical member can be a component used in a normal image display device. Examples of the optical member include a front plate, an impact resistant film, a touch sensor panel, and the like.
  • the laminated body 100 includes a first optical member 110.
  • the first optical member 110 may have an wear-resistant layer on its outermost surface. When the first optical member 110 has a wear-resistant layer on its outermost surface, the first optical member 110 may have a hard coat layer directly below the wear-resistant layer.
  • the first optical member 110 can have a wear-resistant layer and a hard coat layer in order from the visual side.
  • the laminate 100 preferably further comprises a second optical member, or further comprises a second optical member and a third optical member.
  • the first optical member 110 is preferably arranged so as to be a layer forming the outermost surface on the visual side of the image display device.
  • the first optical member 110 is preferably a front plate.
  • the second optical member is preferably an impact resistant film or a touch sensor panel.
  • the third optical member is preferably a touch sensor panel.
  • the material and thickness of the front plate are not limited as long as it is a plate-like body capable of transmitting light, and the front plate may have a single-layer structure or a multi-layer structure, and is a glass plate-like body (for example, a glass plate). , Glass film, etc.), a resin plate-like body (for example, a resin plate, a resin sheet, a resin film, etc.), and a laminate of a glass plate-like body and a resin plate-like body are exemplified.
  • the front plate can be a layer constituting the outermost surface of the image display device on the visual side.
  • the glass plate tempered glass for display is preferably used.
  • the thickness of the glass plate is, for example, 20 ⁇ m or more and 1000 ⁇ m or less.
  • the front plate 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 having a hard coat layer 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 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. Examples of the ultraviolet curable resin 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 strength. 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 2000 ⁇ m or less.
  • a wear-resistant layer is formed on the visible side of the hard coat layer in order to improve wear resistance and prevent contamination by sebum and the like.
  • the front plate can have a wear-resistant layer, and the wear-resistant layer can be a layer constituting the visible side surface of the front plate.
  • the wear resistant layer can include a structure derived from a fluorine compound.
  • a fluorine compound a compound having a silicon atom and having a hydrolyzable group such as an alkoxy group or a halogen in the silicon atom is preferable.
  • a coating film can be formed by the dehydration condensation reaction of hydrolyzable groups, and the adhesion of the wear-resistant layer can be improved by reacting with active hydrogen on the surface of the base material.
  • the fluorine compound has a perfluoroalkyl group or a perfluoropolyether structure because it can impart water repellency.
  • the fluorine compound preferably contained is a fluorine-containing organosiloxane compound containing an alkylene group having 2 or more carbon atoms and a perfluoroalkylene group.
  • the thickness of the wear-resistant layer is, for example, 1 to 20 nm.
  • the abrasion resistant layer has water repellency, and the water contact angle is, for example, about 110 to 125 °.
  • the contact angle hysteresis and the sliding angle measured by the sliding method are about 3 to 20 ° and about 2 to 55 °, respectively.
  • the wear-resistant layer is a silanol condensation catalyst, an antioxidant, a rust preventive, an ultraviolet absorber, a light stabilizer, a fungicide, an antibacterial agent, an antibiotic agent, and an extinguishing agent, as long as the effect of the present invention is not impaired. It may contain various additives such as odorants, pigments, flame retardants, and antistatic agents.
  • a primer layer may be provided between the abrasion resistant layer and the hard coat layer.
  • the primer agent include a primer agent such as an ultraviolet curable type, a thermosetting type, a moisture curable type, or a two-component curable type epoxy compound.
  • a polyamic acid may be used as the primer agent, and it is also preferable to use a silane coupling agent.
  • the thickness of the primer layer is, for example, 0.001 to 2 ⁇ m.
  • a primer agent is applied, dried, and cured as necessary on the hard coat layer to form a primer layer, and then a fluorine compound is applied. It can be formed by applying and drying a composition containing the mixture (hereinafter, also referred to as a composition for coating an abrasion resistant layer).
  • a composition for coating an abrasion resistant layer examples include a dip coating method, a roll coating method, a bar coating method, a spin coating method, a spray coating method, a die coating method, and a gravure coater method.
  • the coated surface is subjected to a hydrophilic treatment such as plasma treatment, corona treatment, or ultraviolet treatment before applying the primer agent or the composition for coating the abrasion resistant layer.
  • a hydrophilic treatment such as plasma treatment, corona treatment, or ultraviolet treatment.
  • This laminate can be laminated directly on the front plate, or it can be laminated on another transparent base material and bonded to the front plate using an adhesive or an adhesive.
  • the front plate 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 adjustment function, and the like.
  • the impact-resistant film is a film for protecting a coloring member, a polarizing plate, or the like from an external impact.
  • the impact-resistant film is a thermoplastic resin, for example, a polyolefin resin such as a polyethylene resin, a polypropylene resin, or a cyclic polyolefin resin; a polyester resin such as polyethylene terephthalate or polyethylene naphthalate; a polycarbonate resin; (meth) acrylic. It can be composed of a based resin or the like.
  • the impact resistant film may be composed of a single layer or may be composed of multiple layers.
  • the thickness of the impact resistant film can be, for example, 5 ⁇ m or more and 100 ⁇ m or less, preferably 10 ⁇ m or more and 90 ⁇ m or less, and more preferably 20 ⁇ m or more and 80 ⁇ m or less. If the thickness is less than 5 ⁇ m, the protection of the coloring member and the polarizing plate may be insufficient, and it is disadvantageous in terms of handleability. It is preferable that the thickness is 100 ⁇ m or less from the viewpoint of increasing flexibility.
  • the laminated body may be provided with a touch sensor panel on a surface opposite to the visual viewing side.
  • the touch sensor panel as long as it is a sensor that can detect the touched position, the detection method is not limited, and the resistance film method, the capacitance coupling method, the optical sensor method, the ultrasonic method, and the electromagnetic induction coupling method are used.
  • a touch sensor panel of a method, a surface acoustic wave method, or the like is exemplified. Since the cost is low, a touch sensor panel of a resistance film type or a capacitance coupling type is preferably used.
  • An example of a resistance film type touch sensor panel is a pair of substrates arranged opposite to each other, an insulating spacer sandwiched between the pair of substrates, and a transparent film provided as a resistance film on the inner front surface of each substrate. It is composed of a conductive film and a touch position detection circuit.
  • a touch position detection circuit detects the change in voltage at this time, and the touched position is detected.
  • An example of a capacitance coupling type touch sensor panel is composed of a substrate, a transparent electrode for position detection provided on the entire surface of the substrate, and a touch position detection circuit.
  • a capacitance coupling type touch sensor panel when the surface of the front plate is touched, the transparent electrode is grounded via the capacitance of the human body at the touched point.
  • the touch position detection circuit detects the grounding of the transparent electrode, and the touched position is detected.
  • the pressure-sensitive adhesive layer can be bonded to the coloring member and other layers by being laminated in contact with the coloring member.
  • the first optical member 110 and the coloring member 130 are joined via the pressure-sensitive adhesive layer 120.
  • the pressure-sensitive adhesive is also called 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 pressure-sensitive adhesive layer 120 may be one layer or may be composed of two or more layers, but is preferably one layer.
  • the pressure-sensitive adhesive layer 120 can be composed of a pressure-sensitive adhesive composition containing a resin as a main component, such as (meth) acrylic type, rubber type, urethane type, ester type, silicone type, and polyvinyl ether type. 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 containing 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, 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 formed pressure-sensitive adhesive layer 120 can be irradiated with active energy rays to obtain a cured product having a desired degree of curing.
  • the thickness of the pressure-sensitive adhesive layer 120 is preferably larger than the thickness of the colored layer 131, more preferably 4 ⁇ m or more, still more preferably 5 ⁇ m or more, from the viewpoint of absorbing the step caused by the colored layer 131 described later.
  • the thickness of the pressure-sensitive adhesive layer 120 is preferably 100 ⁇ m or less, more preferably 50 ⁇ m or less, from the viewpoint of flexibility.
  • the thickness of the pressure-sensitive adhesive layer 120 is the maximum thickness of the pressure-sensitive adhesive 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.
  • An adhesive layer is laminated on one surface of the coloring member 130 in contact with the coloring member 130.
  • 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 first optical member 110 than the separation layer, and the separation layer is closer to the first optical member 110 than the coloring layer.
  • the protective layer, the colored layer, and the separation layer are laminated in the order closer to the first optical member 110, or the colored layer and the protective layer are laminated in the order closer to the first optical member 110. It is laminated so as to be a layer and a separating layer, or is laminated so as to be a separating layer, a colored layer, and a protective layer in the order closer to the first optical member 110.
  • rainbow-colored interference fringes hereinafter, may be referred to as rainbow unevenness
  • the thickness of the coloring member 130 may be, for example, 0.1 ⁇ m or more and 10 ⁇ m or less, preferably 1 ⁇ m or more and 7 ⁇ m or less, and more preferably 1 ⁇ m or more and 6 ⁇ 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 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 per 1 ⁇ m of thickness, preferably 2 or more, more preferably 2.5 or more, and further preferably 2.7 or more.
  • the optical density is measured as follows. 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 first optical film 110, an adhesive layer 120, a coloring member 130, and a polarizing plate 140, and the coloring member 130 includes a protective layer 133, a coloring layer 131, and a separation layer 132. Included in 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 pressure-sensitive adhesive layer 120 are laminated in contact with each other, but in another embodiment, with either one or both of the coloring layer and the separation layer of the coloring member 130.
  • the pressure-sensitive adhesive layers may be laminated 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 colored layer 131 can be formed by a printing method using ink or paint, a vapor deposition method using powder of a metal pigment, a photolithography method using a composition for forming a colored layer, or the like.
  • the photolithography method is preferable from the viewpoint of reducing the thickness of the colored layer 131 and increasing the optical density.
  • an active energy ray-curable resin composition for forming a colored layer is applied onto a support, a coating film of the photosensitive resin composition is exposed, and then developed, and then developed. , Can be fired.
  • 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.
  • a glass plate or the like can be used as the support.
  • a separation layer can be formed on the glass plate and a coloring layer can be formed on the separation layer in order to facilitate the peeling of the coloring layer from the glass plate.
  • the active energy ray-curable colored layer forming composition can contain, for example, a binder resin, a colorant, 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.
  • binder resin examples include chlorinated polyolefin (for example, chlorinated polyethylene and chlorinated polypropylene), polyester resin, urethane resin, (meth) acrylic resin, vinyl acetate resin, vinyl chloride-vinyl acetate copolymer, and cellulose resin. Resin is mentioned.
  • 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 colorant can be black in order to facilitate the shielding effect of the non-display area B.
  • the composition for forming a colored layer preferably contains carbon black.
  • Colorants other than carbon black include, for example, inorganic pigments such as titanium white, zinc flower, iron black, valve handle, chrome vermilion, ultramarine blue, cobalt blue, yellow lead, titanium yellow; phthalocyanine blue, indanthrone blue, etc.
  • Organic pigments or dyes such as isoindolinone yellow, benzidine yellow, quinacridone red, polyazo red, perylene red, aniline black; metal pigments composed of scaly foil pieces such as aluminum and brass; titanium dioxide-coated mica, basic lead carbonate, etc. Examples thereof include a pearl luster pigment (pearl pigment) composed of scaly foil pieces.
  • the colorant is preferably contained in an amount of 50 parts by mass or more and 200 parts by mass or less with respect to 100 parts by mass of the binder resin.
  • 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 pressure-sensitive adhesive layer 120 and the colored member 130 are bonded to each other. When the colored layer is formed by the above-mentioned photolithography method, it tends to be easy to provide a tapered portion in the end region of the colored layer.
  • the separation layer 132 has a function for facilitating the separation between the support and the coloring layer 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 colored layer and the separation layer separated from the support can transfer the separation layer side to the first optical member via the bonding layer.
  • 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 laminated body 200 has a function of protecting the colored layer and flattening the step generated by the colored layer.
  • the protective layer can be an organic layer or an inorganic layer.
  • As the material of the inorganic layer and the organic layer the same materials as those shown in the description of the separation layer 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 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 polarizing plate may be a linear polarizing plate or a circular polarizing plate.
  • the linear polarizing plate include a stretched film or a stretched layer on which a dichroic dye is adsorbed, a film containing a film coated with a dichroic dye and cured, and the like as a polarizer.
  • the dichroic dye iodine or a dichroic organic dye is used.
  • 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 composition containing a dichroic dye having a liquid crystal property or a composition containing a dichroic dye and a polymerizable liquid crystal is applied and cured.
  • examples thereof include a film containing a cured product of a polymerizable liquid crystal compound such as a layer obtained by the above process.
  • a film coated with a dichroic dye and cured is preferable because there is no limitation in the bending direction as compared with a stretched film or a stretched layer on which a dichroic dye is adsorbed.
  • the linear polarizing plate may be composed of only a polarizing element, or may further include a protective layer, a thermoplastic resin film, a base material, an alignment film, and a protective layer in addition to the polarizing element.
  • the thickness of the linear polarizing plate is, for example, 2 ⁇ m or more and 100 ⁇ m or less, preferably 10 ⁇ m or more and 60 ⁇ m or less.
  • a linear polarizing plate having a stretched film or a stretched layer as a polarizer A linear polarizing plate having a stretched film having a dichroic dye adsorbed as a polarizer will be described.
  • a stretched film on which a dichroic dye, which is a polarizer, is adsorbed is usually bicolorized by a step of uniaxially stretching the polyvinyl alcohol-based resin film and dyeing the polyvinyl alcohol-based resin film with the bicolor dye.
  • a polarizing element may be used as it is as a linear polarizing plate, or a linear polarizing plate having a thermoplastic resin film described later bonded to one side or both sides thereof may be used.
  • the thickness of the polarizer is preferably 2 ⁇ m or more and 40 ⁇ m or less, and more preferably 5 ⁇ m or more and 20 ⁇ m or less.
  • the polyvinyl alcohol-based resin is obtained by saponifying the polyvinyl acetate-based resin.
  • the 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 85 mol% or more and 100 mol% or less, preferably 98 mol% or more.
  • the polyvinyl alcohol-based resin may be modified, and for example, polyvinyl formal or polyvinyl acetal modified with aldehydes can also be used.
  • the degree of polymerization of the polyvinyl alcohol-based resin is usually 1000 or more and 10000 or less, preferably 1500 or more and 5000 or less.
  • the stretched layer on which the dichroic dye, which is a polarizer, is adsorbed is usually a step of applying a coating liquid containing the above-mentioned polyvinyl alcohol-based resin on a base film, a step of uniaxially stretching the obtained laminated film, and uniaxial.
  • a step of dyeing the polyvinyl alcohol-based resin layer of the stretched laminated film with a dichroic dye to adsorb the dichroic dye to form a polarizer, and the film on which the dichroic dye is adsorbed is a boric acid aqueous solution.
  • the base film may be peeled off from the polarizer.
  • the material and thickness of the base film may be the same as the material and thickness of the thermoplastic resin film described later.
  • the stretched film or the polarizing element which is a stretched layer, may be incorporated into the laminate in the form in which a thermoplastic resin film is bonded to one side or both sides thereof.
  • This thermoplastic resin film can function as a protective film for a polarizer or a retardation film.
  • the thermoplastic resin film is, for example, a polyolefin resin such as a chain polyolefin resin (polypropylene resin, etc.), a cyclic polyolefin resin (norbornen resin, etc.); a cellulose resin such as triacetyl cellulose; polyethylene terephthalate, polyethylene na. It can be a film composed of a polyester resin such as phthalate or polybutylene terephthalate; a polycarbonate resin; a (meth) acrylic resin; or a mixture thereof.
  • the thickness of the thermoplastic resin film is usually 100 ⁇ m or less, preferably 60 ⁇ m or less, more preferably 40 ⁇ m or less, still more preferably 30 ⁇ m or less, still more preferably 20 ⁇ m or less. Yes, it is usually 5 ⁇ m or more, preferably 10 ⁇ m or more.
  • the thermoplastic resin film may or may not have a phase difference.
  • the thermoplastic resin film can be bonded to the polarizer using, for example, a bonding layer described later.
  • a linear polarizing plate having a film coated with a dichroic dye and cured as a polarizer A linear polarizing plate having a film coated with a dichroic dye and cured as a polarizer will be described.
  • the film used as a polarizer, to which a dichroic dye is applied and cured is obtained by applying a composition containing a dichroic dye having a liquid crystal property or a composition containing a dichroic dye and a liquid crystal compound to a base material. Examples thereof include a film obtained by curing.
  • the film may be used as a linear polarizing plate by peeling off the base material or together with the base material, or may be used as a linear polarizing plate in a configuration having a thermoplastic resin film on one side or both sides thereof.
  • the base material may be a thermoplastic resin film.
  • the example and thickness of the base material may be the same as those exemplified in the above description of the thermoplastic resin film.
  • the substrate may be a thermoplastic resin film having a hard coat layer, an antireflection layer, or an antistatic layer on at least one surface.
  • the base material may have a hard coat layer, an antireflection layer, an antistatic layer, or the like formed only on the surface on the side where the polarizer is not formed.
  • the base material may have a hard coat layer, an antireflection layer, an antistatic layer, or the like formed only on the surface on the side where the polarizer is formed.
  • thermoplastic resin film examples include the same one as the linear polarizing plate provided with the stretched film or the stretched layer as a polarizer.
  • the thermoplastic resin film can be attached to the polarizer using, for example, an adhesive or an adhesive.
  • the film coated with the dichroic pigment and cured is thin, but if it is too thin, the strength is lowered 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.
  • film coated with the dichroic dye and cured include those described in JP2013-37353A, JP2013-33249, and the like.
  • the polarizing plate can be a circular polarizing plate including a linear polarizing plate and a retardation film.
  • a circularly polarizing plate in which a linearly polarized light layer and a retardation layer are arranged so that the absorption axis of the linearly polarizing plate and the slow axis of the retardation layer are at a predetermined angle can exhibit an antireflection function.
  • the retardation layer may include one layer or two or more retardation layers.
  • 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 examples include a retardation layer ( ⁇ / 4 layer) that gives a retardation of ⁇ / 4, a retardation layer ( ⁇ / 2 layer) that gives a retardation of ⁇ / 2, and a positive C layer. ..
  • the retardation layer preferably includes a ⁇ / 4 layer, and more preferably includes at least one of a ⁇ / 4 layer and a ⁇ / 2 layer or 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 is, 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 above-mentioned thermoplastic resin film, or may be formed from a layer in which the polymerizable liquid crystal compound is cured.
  • the retardation layer may further include an alignment film and a base film, and the ⁇ / 4 layer, the ⁇ / 2 layer, and the positive C layer may be joined by a bonding layer described later.
  • 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 thermoplastic resin 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 in the form of having an alignment layer and a base film.
  • the polarizing plate in which the linear polarizing plate and the retardation layer are arranged so that the absorption axis of the linear polarizing plate and the slow axis of the retardation layer have a predetermined angle has an antireflection function, that is, a circular polarizing plate. Can function as.
  • the retardation layer includes the ⁇ / 4 layer
  • the angle formed by the absorption axis of the linearly polarized light layer and the slow axis of the ⁇ / 4 layer can be 45 ° ⁇ 10 °.
  • the retardation layer may have a positive wavelength dispersibility or a reverse wavelength dispersibility.
  • the ⁇ / 4 layer preferably has anti-wavelength dispersibility.
  • the linear polarizing plate and the retardation layer may be joined by a bonding layer described later.
  • the bonding layer is a layer composed of a pressure-sensitive adhesive or an adhesive.
  • the bonding layer can be a layer that joins the layers by interposing between layers other than the layers to which the pressure-sensitive adhesive layer is bonded.
  • the coloring member 130 and the polarizing plate 140 may be joined by a bonding layer.
  • the pressure-sensitive adhesive used as the material of the bonding layer can be the above-mentioned pressure-sensitive adhesive composition for the pressure-sensitive adhesive layer, and other pressure-sensitive adhesives such as adhesives can be used.
  • the adhesive used as the material of the bonding layer 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 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, and usually 200 ⁇ m or less. It may be 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. There may be.
  • the layer structure of the laminated body will be described with reference to FIG.
  • the laminate 300 shown in FIG. 4A includes a first optical member 110, an adhesive layer 120, a coloring member 130, a bonding layer 150, and a polarizing plate 140 in this order.
  • the protective layer 133, the colored layer 131, and the separating layer 132 are included in this order.
  • the laminate 301 shown in FIG. 4B has a first optical member 110, a bonding layer 150, a second optical member 160, an adhesive layer 120, a coloring member 130, a bonding layer 170, and polarized light.
  • the plate 140 is provided in this order, and the coloring member 130 includes a protective layer 133, a coloring layer 131, and a separation layer 132 in this order.
  • the laminate 302 shown in FIG. 4C includes a first optical member 110, an adhesive layer 120, a coloring member 130, a bonding layer 150, a polarizing plate 140, a bonding layer 170, and a second optical.
  • the members 160 are provided in this order, and the coloring member 130 includes the protective layer 133, the coloring layer 131, and the separation layer 132 in this order.
  • the laminate 303 shown in FIG. 4D includes a first optical member 110, a bonding layer 150, a second optical member 160, an adhesive layer 120, a coloring member 130, a bonding layer 170, and polarized light.
  • the plate 140, the bonding layer 180, and the third optical member 190 are provided in this order, and the coloring member 130 includes the protective layer 133, the coloring layer 131, and the separation layer 132 in this order.
  • Specific layer configurations of the laminated body include, for example, the following layer configurations.
  • the method for producing the laminate can be, for example, a production method including a step of transferring the colored layer to the optical member.
  • the first optical member 110 is prepared, and the colored member laminate 191 having the protective layer 133, the colored layer 131, the colored member 130 having the separating layer 132, and the support 192 is prepared.
  • Step [FIG. 5 (a)] and the step of bonding the first optical member 110 and the protective layer 133 side of the colored member laminate 191 via the pressure-sensitive adhesive layer 120 [FIG. 5 (b)] and support.
  • the step of obtaining the laminated body 400 [FIG. 5 (e)] can be included.
  • a separation layer is formed on the support, and a cured film of the composition for forming a coloring layer is partially formed on the separation layer to obtain a colored member laminate, and the colored member laminate is on the colored layer side.
  • This can be done by bonding the optical member and the optical member and removing the support.
  • the support for example, a glass plate, a resin film, or the like can be used.
  • the coloring member may be transferred to the resin film once, and the coloring member may be transferred to the optical member again.
  • a photolithography method can be used as described above.
  • the optical member, the pressure-sensitive adhesive layer, the coloring member, and the bonding layer can be bonded using a known device such as a laminator, a roll, or a cell joining machine.
  • the bonding surface of the optical member, the pressure-sensitive adhesive layer, the coloring member, and the bonding layer can be subjected to surface treatment such as corona treatment or plasma treatment.
  • 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 that can be bent, bent, or the like. In the image display device, when the laminate has a front plate, 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 viewing 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. 6 is a diagram schematically showing the method of this evaluation test. As shown in FIG. 6, two individually movable mounting tables 501 and 502 are arranged so that the gap C is 2.0 mm (1R) so that the center in the width direction is located at the center of the gap C. The laminated body 500 was fixedly arranged in (FIG. 6 (a)).
  • the laminated body 500 was arranged so that the front plate (first optical member) side was on the upper side. Then, the two mounting tables 501 and 502 were rotated 90 degrees upward with the positions P1 and P2 as the centers of the rotation axes, and a bending force was applied to the region of the laminated body 500 corresponding to the gap C of the mounting tables (). FIG. 6 (b). After that, the two mounting tables 501 and 502 were returned to their original positions (FIG. 6 (a)). After completing the above series of operations, the number of times the bending force was applied was counted as one.
  • the laminate was placed on a 125 ⁇ m-thick polyimide substrate on a stone surface plate (manufactured by Uniseiki Co., Ltd., first grade). The laminate was installed so that the front plate was on the upper side.
  • a pressure measurement film (“Prescale” (registered trademark) manufactured by FUJIFILM Corporation, grade: HS (trade name) was sandwiched between the laminate and the polyimide substrate (thickness 125 ⁇ m).
  • Prescale registered trademark
  • HS trade name
  • the bottom surface stress is measured from the discoloration of the pressure-sensitive paper at the falling part using a pressure image analysis system (“FPD-8010J” (trade name) manufactured by FUJIFILM Corporation), and the average value of the three measured values is calculated. Impact resistance was evaluated. This test was performed in an environment with a temperature of 23 ° C. and a relative humidity of 55%. It was evaluated according to the following criteria. A: Very good; 73 MPa or less B: Good; 73 MPa or more, 77 MPa or less C: Somewhat good; 77 MPa or more, 85 MPa or less D: Defective; 85 MPa or more
  • 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 film were measured using a laser microscope (LEXT, manufactured by Olympus Corporation).
  • [Adhesive layer] 25 parts by mass of 4-hydroxybutyl acrylate (4-HBA), 2-ethylhexyl acrylate (2-EHA) in a 500 ml 4-neck reactor equipped with a cooling device so that nitrogen gas is refluxed and temperature control is easy. After adding 50 parts by mass, 15 parts by mass of hexyl acrylate (HA), and 10 parts by mass of isobornyl acrylate (IBOA), 100 parts by mass of ethyl acetate (EAc) was added as a solvent. Then, nitrogen gas was purged for 1 hour to remove oxygen, and then maintained at 60 ° C.
  • 4-HBA 4-hydroxybutyl acrylate
  • 2-EHA 2-ethylhexyl acrylate
  • IBOA isobornyl acrylate
  • EAc ethyl acetate
  • a mixture obtained by adding 0.5 parts by mass of a cross-linking agent (CORONATE-L, Tosoh Corporation) to 100 parts by mass of the above-mentioned acrylic copolymer is applied onto a release film coated with a silicon release agent, and 100 parts by mass is applied.
  • a pressure-sensitive adhesive layer with a release film was formed by drying at ° C. for 1 minute. The thickness of the pressure-sensitive adhesive layer after drying was 25 ⁇ m.
  • 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
  • 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) having 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
  • PET film A polyethylene terephthalate (PET) film (thickness: 75 [ ⁇ m]) was prepared.
  • 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.
  • the photolithography method includes the following steps: a composition coating step for forming a colored layer, an exposure step, a developing step and a thermosetting step.
  • 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.
  • 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.
  • a retardation film containing the polarizer side of the linear polarizing plate and a layer obtained by polymerizing and curing the liquid crystal compound [thickness 10 ⁇ m, layer structure: acrylic pressure-sensitive adhesive layer (thickness 5 ⁇ m) / ⁇ including a layer obtained by curing the liquid crystal compound / 2 layers (thickness 2 ⁇ m) / UV curable adhesive layer (thickness 2 ⁇ m) / ⁇ / 4 layer (thickness 1 ⁇ m) including a layer on which the liquid crystal compound was cured] was bonded to the pressure-sensitive adhesive layer side.
  • a circularly polarizing plate (thickness 30 ⁇ m, layer structure: COP / polarizer / retardation film) was produced.
  • a colored polyimide film (thickness 50 ⁇ m) is laminated on one surface of a colored polyimide film (thickness 35 ⁇ m) via a bonding layer (thickness 25 ⁇ m) composed of the above-mentioned adhesive layer, and a substitute for an organic EL panel (thickness 110 ⁇ m).
  • a bonding layer (thickness 25 ⁇ m) composed of the above-mentioned adhesive layer, and a substitute for an organic EL panel (thickness 110 ⁇ m).
  • Example 1 The glass plate was removed from the colored member laminate. The exposed surface on the separation layer side and one surface of the impact resistant film were bonded to each other via an adhesive layer (thickness: 3 ⁇ m, UV curable adhesive). Next, the surface of the circularly polarizing plate on the COP side and the impact-resistant film were bonded via a bonding layer (thickness 25 ⁇ m) composed of the above-mentioned pressure-sensitive adhesive layer. Next, the protective film was peeled off from the colored member laminate, and the exposed protective layer and the surface of the front plate on which the hard coat layer was not formed were bonded to each other via an adhesive layer (thickness 25 ⁇ m).
  • the laminated body of Example 1 thus obtained has a layer structure of the laminated body 600 shown in FIG. 7 [front plate 610 / adhesive layer 620 / colored member 630 (protective layer 633 / colored layer 631 / separation layer 632) / adhesive.
  • the agent layer 660 / impact resistant film 650 / bonding layer 640 / circularly polarizing plate 670 / bonding layer 680 / substitute for organic EL panel 690] was provided.
  • the colored layer 631 was formed on the entire peripheral edge portion of the laminated body 600.
  • the laminate was subjected to a flexibility test, an evaluation of rainbow unevenness, and an impact resistance test. The results are shown in Table 1.
  • Each bonded surface was subjected to corona treatment.
  • the corona treatment was performed under the conditions of frequency: 20 kHz, voltage: 8.6 kV, power: 2.5 kW, and speed: 6 m / min.
  • Example 2 the layer structure of the laminate 601 shown in FIG. 8 [front plate 610 / adhesive layer 620 / coloring member 630 (protective layer 633 / coloring layer 631 / separation layer 632) / adhesive layer 660 / circularly polarizing plate A laminate of Example 2 was obtained in the same manner as in Example 1 except that the type of layer was changed so as to be 670 / bonded layer 640 / substitute for organic EL panel 690]. The obtained laminate was subjected to a flexibility test, an evaluation of rainbow unevenness, and an impact resistance test. The results are shown in Table 1.
  • Example 3 In Example 1, the layer structure of the laminate 602 shown in FIG. 9 [front plate 610 / bonding layer 640 / circularly polarizing plate 670 / adhesive layer 660 / coloring member 630 (separation layer 632 / coloring layer 631 / protective layer 633). ) / Adhesive layer 620 / Substitute for organic EL panel 690], a laminate of Example 3 was obtained in the same manner as in Example 1. The obtained laminate was subjected to a flexibility test, an evaluation of rainbow unevenness, and an impact resistance test. The results are shown in Table 1.
  • the laminate of the fourth embodiment was obtained in the same manner except that the coloring member was laminated so as to include the separation layer, the coloring layer, and the protective layer in this order from the side closer to the front plate.
  • the layer structure of this laminated body was a substitute for the front plate / adhesive layer / coloring member (separation layer / coloring layer / protective layer) / adhesive layer / circular polarizing plate / bonding layer / organic EL panel.
  • the obtained laminate was subjected to a flexibility test, an evaluation of rainbow unevenness, and an impact resistance test. The results are shown in Table 1.
  • Example 5 the laminated body of Example 5 was obtained in the same manner except that the colored member and the circularly polarizing plate were laminated by the pressure-sensitive adhesive layer.
  • the layer structure of this laminate was a substitute for the front plate / adhesive layer / coloring member (separation layer / coloring layer / protective layer) / adhesive layer / circular polarizing plate / bonding layer / organic EL panel.
  • the obtained laminate was subjected to a flexibility test, an evaluation of rainbow unevenness, and an impact resistance test. The results are shown in Table 1.
  • Example 1 the layer structure of the laminated body 603 shown in FIG. 10 [front plate 610 / bonding layer 640 / impact resistant film 650 / adhesive layer 660 / coloring member 630 (separation layer 632 / coloring layer 631 / protective layer). 633) / Adhesive layer 620 / Circular polarizing plate 670 / Laminated layer 680 / Substitute for organic EL panel 690] A laminate of 1 was obtained. The obtained laminate was subjected to a flexibility test, an evaluation of rainbow unevenness, and an impact resistance test. The results are shown in Table 1.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mathematical Physics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Human Computer Interaction (AREA)
  • Polarising Elements (AREA)
  • Liquid Crystal (AREA)
  • Electroluminescent Light Sources (AREA)
  • Laminated Bodies (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Optical Filters (AREA)

Abstract

La présente invention concerne un corps stratifié comprenant un premier élément optique, une couche adhésive, un élément de coloration et une plaque de polarisation. La couche adhésive et l'élément de coloration sont stratifiés en contact l'un avec l'autre, et l'élément de coloration est disposé entre la couche adhésive et la plaque de polarisation. La présente invention concerne un corps stratifié configuré de telle sorte que des fissures ont tendance à ne pas se produire dans l'élément de coloration à la fois lorsque, à une température de 25 °C, le corps stratifié est plié de manière répétée avec le premier côté de l'élément optique vers l'intérieur, et lorsqu'il est plié de manière répétée avec le premier côté de l'élément optique vers l'extérieur.
PCT/JP2020/047605 2020-01-09 2020-12-21 Corps stratifié et dispositif d'affichage d'image WO2021140892A1 (fr)

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JP2023024150A (ja) * 2021-08-06 2023-02-16 日東電工株式会社 位相差層付偏光板およびそれを用いた画像表示装置

Citations (6)

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Publication number Priority date Publication date Assignee Title
JP2005284142A (ja) * 2004-03-30 2005-10-13 Tomoegawa Paper Co Ltd 低反射部材
JP2014035493A (ja) * 2012-08-09 2014-02-24 Sanpack:Kk カバーフィルム、カバーフィルムの製造方法及び表示装置
JP2014201027A (ja) * 2013-04-08 2014-10-27 日本写真印刷株式会社 タッチパネル用加飾カバー基材及びその製造方法
JP2017523483A (ja) * 2014-05-15 2017-08-17 エルジー・ケム・リミテッド 印刷層が形成されたタッチスクリーンパネル用カバーウィンドウ及びタッチスクリーンパネル用カバーウィンドウに印刷層を形成する方法
JP2019168633A (ja) * 2018-03-26 2019-10-03 日油株式会社 指紋なじみ低屈折率層用樹脂組成物および反射防止フィルム
WO2019208168A1 (fr) * 2018-04-24 2019-10-31 住友化学株式会社 Corps stratifié optique et procédé de production dudit corps stratifié

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005284142A (ja) * 2004-03-30 2005-10-13 Tomoegawa Paper Co Ltd 低反射部材
JP2014035493A (ja) * 2012-08-09 2014-02-24 Sanpack:Kk カバーフィルム、カバーフィルムの製造方法及び表示装置
JP2014201027A (ja) * 2013-04-08 2014-10-27 日本写真印刷株式会社 タッチパネル用加飾カバー基材及びその製造方法
JP2017523483A (ja) * 2014-05-15 2017-08-17 エルジー・ケム・リミテッド 印刷層が形成されたタッチスクリーンパネル用カバーウィンドウ及びタッチスクリーンパネル用カバーウィンドウに印刷層を形成する方法
JP2019168633A (ja) * 2018-03-26 2019-10-03 日油株式会社 指紋なじみ低屈折率層用樹脂組成物および反射防止フィルム
WO2019208168A1 (fr) * 2018-04-24 2019-10-31 住友化学株式会社 Corps stratifié optique et procédé de production dudit corps stratifié

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