CN113167931A - Laminate and image display device using same - Google Patents
Laminate and image display device using same Download PDFInfo
- Publication number
- CN113167931A CN113167931A CN201980080961.9A CN201980080961A CN113167931A CN 113167931 A CN113167931 A CN 113167931A CN 201980080961 A CN201980080961 A CN 201980080961A CN 113167931 A CN113167931 A CN 113167931A
- Authority
- CN
- China
- Prior art keywords
- support
- laminate
- hard coat
- transparent resin
- resin film
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
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- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 description 1
- ISXSCDLOGDJUNJ-UHFFFAOYSA-N tert-butyl prop-2-enoate Chemical compound CC(C)(C)OC(=O)C=C ISXSCDLOGDJUNJ-UHFFFAOYSA-N 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
- 238000001029 thermal curing Methods 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
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- WBYWAXJHAXSJNI-VOTSOKGWSA-M trans-cinnamate Chemical group [O-]C(=O)\C=C\C1=CC=CC=C1 WBYWAXJHAXSJNI-VOTSOKGWSA-M 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
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Images
Classifications
-
- 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
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
- B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
-
- 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
-
- 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
- G02B5/30—Polarising elements
-
- 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
-
- 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
-
- 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
- B32B2457/00—Electrical equipment
- B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Optics & Photonics (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Laminated Bodies (AREA)
- Electroluminescent Light Sources (AREA)
- Surface Treatment Of Optical Elements (AREA)
- Polarising Elements (AREA)
Abstract
The transparent resin film having a hard coat layer is not resistant to impact, and even when the transparent resin film is incorporated into an image display device, for example, when an external impact such as a touch pen falling from a pen tip is applied to a display surface of the image display device, a crack may be generated in the hard coat layer, which is a problem. The purpose of the present invention is to provide a laminate comprising a very thin hard coat layer having excellent impact resistance and a transparent resin film, an image display device provided with the laminate, and a method for producing the laminate. A laminate comprising a transparent resin film, a support formed on at least one surface of the transparent resin film, and a hard coat layer formed on the support, wherein the support has a pattern structure.
Description
Technical Field
The present invention relates to a laminate and an image display device using the same.
Background
In recent years, liquid crystal display devices and organic EL display devices (OLEDs) have been widely used as image display devices with the spread of mobile phones, tablet terminals, and the like. Among them, various flexible image display devices have been proposed. In such a flexible image display device, a film to be used is required to be thin and have good bending properties, and a transparent resin film having a hard coat layer for protecting the image display device is not an exception (patent document 1).
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 2018-59069
Disclosure of Invention
However, such a transparent resin film having a hard coat layer is not resistant to impact, and even when the transparent resin film is incorporated into an image display device, for example, when an external impact such as a touch pen falling from a pen tip is applied to a display surface of the image display device, a crack may be generated in the hard coat layer, which is a problem.
The present invention has been made to solve the above-described conventional problems, and a main object thereof is to provide a laminate including a very thin hard coat layer having excellent impact resistance and a transparent resin film, an image display device including the laminate, and a method for manufacturing the laminate.
That is, the present invention provides the following laminate, image display device, and method for producing the laminate.
[1] A laminate comprising a transparent resin film, a support formed on at least one surface of the transparent resin film, and a hard coat layer formed on the support in this order, wherein the support has a pattern structure.
[2] The laminate according to [1], wherein the support has at least one structure selected from a honeycomb structure, a truss (トラス) structure, a frame (ラーメン) structure, a stripe structure and a round structure.
[3] The laminate according to [1] or [2], wherein the support has a thickness of 1 μm to 15 μm.
[4] The laminate according to any one of [1] to [3], wherein the width of the support is 500 to 3000 μm in a plan view.
[5] The laminate according to any one of [1] to [4], wherein the support has an optical isotropy.
[6] The laminate according to any one of [1] to [5], wherein an embedding resin layer embedding the support is provided on the one surface of the transparent resin film.
[7] The laminate according to any one of [1] to [6], wherein the support has a compressive modulus of elasticity of 0.01GPa to 8.0GPa at 23 ℃.
[8] A laminate comprising the laminate according to any one of [1] to [7] and a circularly polarizing plate.
[9] An image display device comprising the laminate according to any one of [1] to [8 ].
[10] A method of manufacturing a laminate, comprising: the method for manufacturing the support includes a step of forming a pattern of a resin material on at least one surface of a transparent resin film, a step of preparing a support having a pattern structure by curing the resin material, and a step of forming a hard coat layer on the support.
According to the present invention, a laminate comprising a very thin hard coat layer having excellent impact resistance and a transparent resin film, an image display device provided with the laminate, and a method for producing the laminate can be obtained.
Drawings
Fig. 1 is a plan view showing a support formed on a transparent resin film of a laminate according to an embodiment of the present invention.
Fig. 2 is a sectional view of a laminate according to an embodiment of the present invention.
Fig. 3 is a plan view showing a support formed on a transparent resin film of a laminate according to another embodiment of the present invention.
Fig. 4 is a plan view showing a support formed on a transparent resin film of a laminate according to still another embodiment of the present invention.
Fig. 5 is a plan view showing a support formed on a transparent resin film of a laminate according to still another embodiment of the present invention.
Fig. 6 is a plan view showing a support formed on a transparent resin film of a laminate according to still another embodiment of the present invention.
Fig. 7 is a sectional view of a laminate according to still another embodiment of the present invention.
Fig. 8 is a sectional view of a laminate according to still another embodiment of the present invention.
Detailed Description
Preferred embodiments of the present invention will be described below, but the present invention is not limited to these embodiments.
(definitions of terms and symbols)
The terms and symbols in the present specification are defined as follows.
(1) Refractive index (nx, ny, nz)
"nx" is a refractive index in a direction in which the in-plane refractive index is maximum (i.e., the slow axis direction), "ny" is a refractive index in a direction orthogonal to the slow axis in the plane, and "nz" is a refractive index in the thickness direction.
(2) Phase difference value in plane
The in-plane retardation (Re (λ)) means the in-plane retardation of the film at 23 ℃ and a wavelength λ (nm). Re (λ) was determined by assuming that the film thickness was d (nm), and was determined by assuming that Re (λ) ═ x-ny) × d.
(3) Phase difference value in thickness direction
The in-plane retardation (Rth (λ)) means a retardation in the thickness direction of the film at 23 ℃ and a wavelength λ (nm). Rth (λ) is determined by assuming that the film thickness is d (nm), and Rth (λ) ═ ((nx + ny)/2-nz) × d.
(constitution of layer Integrated body)
Fig. 1 is a plan view showing a support formed on a transparent resin film of a laminate according to an embodiment of the present invention. Fig. 2 is a sectional view of a laminate according to an embodiment of the present invention. As shown in fig. 2, the laminate 10 includes a transparent resin film 1, a support 2 formed on one surface of the transparent resin film 1, and a hard coat layer 5 formed on the support 2. The hard coat layer 5 formed on the support 2 may be in any form as long as a part or the whole of the hard coat layer 5 is present above the support 2, including a form in which the hard coat layer is in contact with the support 2, a form in which the hard coat layer is embedded in the support 2, and a form in which the hard coat layer is formed through another layer. That is, the hard coat layer may be formed on the support 2 so as to embed the support 2 as shown in fig. 2, or may be formed on the support 2 through the embedding resin layer 4 embedding the support 2 as shown in fig. 8. The laminate 10 may be a single sheet or a long sheet. The thickness of the transparent resin film is typically 100 μm or less. The thickness of the support 2 is typically 1 μm to 15 μm, and the width of the support 2 in a plan view is typically 500 μm to 3000 μm. The support 2 is preferably transparent, more preferably transparent and substantially optically isotropic. The support 2 has a pattern structure, as the pattern structure, typically a honeycomb structure as shown in fig. 1. The thickness of the hard coat layer is typically 1 μm to 15 μm. The thickness of the hard coat layer means the thickness of the thickest part of the hard coat layer.
Fig. 3 to 6 are plan views showing a support formed on a transparent resin film of a laminate according to another embodiment of the present invention. The support may have a frame structure as shown in fig. 3, a truss structure as shown in fig. 4, a circular structure (a structure in which circles are arranged in a matrix) as shown in fig. 5, or a striped structure as shown in fig. 6. In this way, when the support 2 is formed in a pattern on the surface of the transparent resin film 1, the amount of material used for the support can be reduced as compared with the case where the support is formed on the entire surface of the transparent resin film 1.
Fig. 7 is a sectional view of a laminate according to still another embodiment of the present invention. As shown in fig. 7, the laminate 11 has a support 2 (hereinafter, sometimes referred to as a 1 st support 2) on one surface of a transparent resin film 1, and a support 3 (hereinafter, sometimes referred to as a 2 nd support 3) on the other surface of the transparent resin film 1. The 2 nd support 3 has a pattern structure. The pattern structure of the 2 nd support 3 may be the same as or different from the pattern structure of the 1 st support 2. When the pattern structure of the 1 st support body 2 is the same as the pattern structure of the 2 nd support body 3, it is preferable that the 1 st support body 2 and the 2 nd support body 3 are arranged so that the area of the portion where they overlap with each other becomes smaller in a plan view, as shown in fig. 7. Further, a hard coat layer 5 is formed on the support 2 and the support 3.
Fig. 8 is a sectional view of a laminate according to still another embodiment of the present invention. As shown in fig. 8, the laminate 12 includes an embedding resin layer 4 embedding the support 2 on one surface of the transparent resin film 1. This can smooth the step formed by the support body 2. The surface of the transparent resin film 1 can be protected by covering the exposed portion of the transparent resin film 1 with the embedding resin layer 4. Further, a hard coat layer 5 is formed on the embedding resin layer 4. Note that 2 or more of the above embodiments may be combined.
< transparent resin film >
The transparent resin film used in the present invention has a visible light transmittance of 70% or more, preferably 80% or more. The transparent resin film may be any transparent polymer film. Specifically, the film may be formed of a polymer such as polyethylene, polypropylene, polymethylpentene, polyolefins such as cycloolefin derivatives having a unit containing norbornene or cycloolefin monomer, (modified) celluloses such as cellulose diacetate, cellulose triacetate and cellulose propionate, acrylics such as methyl methacrylate (co) polymers, polystyrenes such as styrene (co) polymers, acrylonitrile-butadiene-styrene copolymers, acrylonitrile-styrene copolymers, ethylene-vinyl acetate copolymers, polyvinyl chlorides, polyvinylidene chlorides, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polycarbonate and polyarylate, polyamides such as nylon, polyamides, polyesters, polyamides, polyolefins, and the like, Polyimides, polyamide imides, polyether sulfones, polysulfones, polyvinyl alcohols, polyvinyl acetals, polyurethanes, epoxy resins, and the like. These polymers may be used alone or in combination of 2 or more. Among the above-described transparent resin films, polyamide-imide films, polyimide films, polyester films, olefin films, acrylic films, and cellulose films, which are excellent in transparency and heat resistance, are preferable. It is also preferable to disperse inorganic particles such as silica, organic fine particles, rubber particles, and the like in the polymer film. Further, compounding agents such as colorants such as pigments and dyes, fluorescent brighteners, dispersants, plasticizers, heat stabilizers, light stabilizers, infrared absorbers, ultraviolet absorbers, antistatic agents, antioxidants, lubricants, and solvents may be contained. The thickness of the transparent resin film is 5 to 200 μm, preferably 20 to 100 μm.
(support body)
The laminate of the present invention has a support on at least one surface of the transparent resin film. The support has a pattern structure as described above. The support body preferably has at least one structure selected from a honeycomb structure, a truss structure, a frame structure, a stripe structure, and a round structure. The support body more preferably has a honeycomb structure, a truss structure or a round structure, and particularly preferably has a honeycomb structure or a round structure. When the support has a honeycomb structure, a truss structure, or a circular structure, when a hard coat layer described later is subjected to stress in one direction, the stress can be dispersed in a direction different from the one direction, and as a result, an impact from the outside in the hard coat layer can be relaxed, and cracking can be suppressed.
The support is preferably transparent and substantially optically isotropic. In the present specification, "substantially optically isotropic" means that, for example, the in-plane retardation Re (550) and the thickness direction retardation Rth (550) of the support are each preferably 20nm or less, more preferably 10nm or less.
When the pattern structure of the 1 st support formed on one surface of the transparent resin film is the same as the pattern structure of the 2 nd support formed on the other surface, the 2 nd support is preferably arranged so that the area of the portion overlapping with the 1 st support is reduced in a plan view.
The thickness of the support is preferably 1 μm to 15 μm, and more preferably 3 μm to 8 μm, as described above.
The support preferably has a compression modulus of elasticity of 0.01GPa to 8.0GPa, more preferably 0.02GPa to 6.0GPa, at 23 ℃. This can suppress cracking of the hard coat layer due to external impact, and improve the processability and flexibility of the laminate of the present invention. The modulus of elasticity under compression can be determined by nanoindentation.
The support may be formed by any suitable material and method as long as it satisfies the above-described constitution and has sufficient adhesion to the transparent resin film. The adhesion between the support and the transparent resin film can be evaluated by a cross-cut peel test according to JIS K5400. The adhesion between the support and the transparent resin film is preferably 0 in the above-mentioned checkered peeling test (number of checkered patterns: 100).
In one embodiment, the support having the pattern structure may be formed by forming a pattern of a resin material or a coating liquid containing a resin material on the surface of the transparent resin film, and hardening (or curing) the resin material. In another embodiment, the support may be formed by vapor depositing SiO on the surface of a transparent resin film2And the like.
As the resin material, any suitable material may be used as long as the effects of the present invention can be obtained. Examples of the resin material include a polyester resin, a polyether resin, a polycarbonate resin, a polyurethane resin, a silicone resin, a polyamide resin, a polyimide resin, a PVA resin, an acrylic resin, an epoxy resin, and a fluorine resin. These may be used alone or in combination (e.g., mixed or copolymerized).
The method for forming the pattern of the resin material or the coating liquid on the surface of the transparent resin film is not particularly limited. Examples of the above method include printing, photolithography, inkjet, nozzle, die coating, and the like. The pattern of the resin material or the coating liquid is preferably formed by printing. Examples of the method of printing the coating liquid in a pattern include a relief printing method, a direct gravure printing method, a lithographic printing method, and a stencil printing method. The coating liquid may contain any suitable other component in addition to the above-described resin material within a range not to impair the effects of the present invention. Examples of such other components include resin components other than the above resin materials as main components, tackifiers, inorganic fillers, organic fillers, metal powders, pigments, foils, softeners, antiaging agents, conductive agents, ultraviolet absorbers, antioxidants, light stabilizers, surface lubricants, leveling agents, corrosion inhibitors, heat stabilizers, polymerization inhibitors, lubricants, solvents, catalysts, and the like.
The conditions for hardening (or curing) the resin material (coating liquid) may be appropriately set according to the kind of the resin material, the composition of the composition, and the like. For example, the resin material may be hardened (or cured) by drying, active energy ray curing, thermal curing, or the like.
(embedding resin layer)
The embedding resin layer embeds the support formed on one surface of the transparent resin film as described above. The thickness of the embedding resin layer is larger than the thickness of the support, and is preferably 3 to 150 μm, and more preferably 5 to 100 μm. The embedding resin layer may also be any suitable functional layer formed according to the required characteristics of the transparent resin film. Examples of the functional layer include a hard coat layer, an adhesive layer, and a transparent optical adhesive layer. The thickness of the embedding resin layer is, for example, 5 to 15 μm in the case where the embedding resin layer is a hard coat layer, 5 to 30 μm in the case where the embedding resin layer is an adhesive layer, and 25 to 125 μm in the case where the embedding resin layer is a transparent optical adhesive layer. The embedding resin layer is preferably transparent and substantially optically isotropic. The embedding resin layer may be formed of the same material as the hard coat layer described later, or may be formed of a different material.
The embedding resin layer may be formed by any suitable material and method as long as it has sufficient adhesion to the transparent resin film and the support. In one embodiment, the embedding resin layer may be formed with a different kind of resin material from the support. The embedding resin layer can be formed by forming a resin layer on the surface of the transparent resin film so as to embed the support and curing the resin layer.
The method for forming the resin layer on the surface of the transparent resin film is not particularly limited. In one embodiment, the resin layer may be formed by applying a coating liquid including a resin material to the surface of the transparent resin film. As the coating method, any suitable coating method may be used. Specific examples thereof include a curtain coating method, a dip coating method, a spin coating method, a printing coating method, a spray coating method, a slit coating method, a roll coating method, a slide coating method, a doctor blade coating method, a gravure coating method, and a wire bar method. The curing conditions may be appropriately set depending on the kind of the resin material used, the composition of the composition, and the like. The coating liquid may contain any suitable other component in addition to the above-described resin material within a range not to impair the effects of the present invention. Examples of such other components include resin components other than the above resin materials as main components, tackifiers, inorganic fillers, organic fillers, metal powders, pigments, foils, softeners, antiaging agents, conductive agents, ultraviolet absorbers, antioxidants, light stabilizers, surface lubricants, leveling agents, corrosion inhibitors, heat stabilizers, polymerization inhibitors, lubricants, solvents, catalysts, and the like.
< hard coating >
The laminate has a hard coat layer on the support. The above embedding resin layer may be used instead of the hard coat layer. If the material forming the hard coat layer is the same as the material forming the embedding resin layer, the hard coat layer may double as the embedding resin layer. The thickness of the hard coat layer is not particularly limited, and may be, for example, 2 to 100 μm. When the thickness of the hard coat layer is less than 2 μm, it is difficult to secure sufficient scratch resistance, and when it exceeds 100 μm, the bending resistance is lowered, and there is a problem that curling due to curing shrinkage occurs.
The hard coat layer may be formed by curing of a hard coat composition containing a reactive material that forms a cross-linked structure by irradiation with active energy rays or thermal energy, but is preferably caused by active energy ray curing. The active energy ray is defined as an energy ray that can decompose a compound that generates an active species to generate an active species. Examples of the active energy ray include visible light, ultraviolet light, infrared light, X-ray, α -ray, β -ray, γ -ray, and electron beam. Ultraviolet rays are particularly preferable. The hard coat composition contains at least 1 polymer of a radical polymerizable compound and a cation polymerizable compound.
The radical polymerizable compound is a compound having a radical polymerizable group. The radical polymerizable group of the radical polymerizable compound may be any functional group capable of undergoing a radical polymerization reaction, and examples thereof include a group containing a carbon-carbon unsaturated double bond. Specific examples thereof include a vinyl group and a (meth) acryloyl group. When the radical polymerizable compound has 2 or more radical polymerizable groups, the radical polymerizable groups may be the same or different. From the viewpoint of improving the hardness of the hard coat layer, the number of the radical polymerizable groups contained in 1 molecule of the radical polymerizable compound is preferably 2 or more. The radical polymerizable compound is preferably a compound having a (meth) acryloyl group among them from the viewpoint of high reactivity, and a compound called a multifunctional acrylate monomer having 2 to 6 (meth) acryloyl groups in 1 molecule, an epoxy (meth) acrylate, a urethane (meth) acrylate, or an oligomer called a polyester (meth) acrylate having a plurality of (meth) acryloyl groups in a molecule and having a molecular weight of from several hundreds to several thousands can be preferably used. Preferably 1 or more selected from epoxy (meth) acrylate, urethane (meth) acrylate and polyester (meth) acrylate.
The cationically polymerizable compound is a compound having a cationically polymerizable group such as an epoxy group, an oxetane group, or a vinyl ether group. From the viewpoint of improving the hardness of the hard coat layer, the number of the cationically polymerizable groups contained in 1 molecule of the cationically polymerizable compound is preferably 2 or more, and more preferably 3 or more. Among the above cationically polymerizable compounds, preferred are compounds having at least 1 of an epoxy group and an oxetane group as a cationically polymerizable group. From the viewpoint of reducing shrinkage accompanying the polymerization reaction, a cyclic ether group such as an epoxy group or an oxetane group is preferable. In addition, the compound having an epoxy group in a cyclic ether group has the following advantages: it is easy to obtain compounds having various structures, and to control the compatibility with a radical polymerizable compound without adversely affecting the durability of the obtained hard coat layer. In addition, the oxetanyl group in the cyclic ether group has the following advantages: the hard coat layer obtained by the present invention is a hard coat layer obtained by forming a network of a cationically polymerizable compound in a region where the hard coat layer is present in a mixed state with a radically polymerizable compound, and the hard coat layer is easily higher in polymerization degree and low in toxicity than an epoxy group, and the hard coat layer obtained by the present invention does not form an independent network by leaving an unreacted monomer in the film even in a region where the hard coat layer is present in a mixed state with a radically polymerizable compound.
Examples of the cationically polymerizable compound having an epoxy group include polyglycidyl ethers of polyhydric alcohols having an alicyclic ring, and alicyclic epoxy resins obtained by epoxidizing compounds having a cyclohexene ring or cyclopentene ring with an appropriate oxidizing agent such as hydrogen peroxide or a peracid; aliphatic epoxy resins such as polyglycidyl ethers of aliphatic polyhydric alcohols or alkylene oxide adducts thereof, polyglycidyl esters of aliphatic long-chain polybasic acids, homopolymers and copolymers of glycidyl (meth) acrylate, and the like; glycidyl ether-type epoxy resins derived from bisphenols such as bisphenol a, bisphenol F, hydrogenated bisphenol a, and derivatives thereof such as alkylene oxide adducts and caprolactone adducts, which are produced by the reaction with epichlorohydrin, and glycidyl ether-type epoxy resins derived from bisphenols such as novolac epoxy resins.
The above hard coat composition may further contain a polymerization initiator. The polymerization initiator is a radical polymerization initiator, a cationic polymerization initiator, a radical and cationic polymerization initiator, and the like, and can be appropriately selected and used. These polymerization initiators are decomposed by at least one of irradiation with active energy rays and heating, and generate radicals or cations to perform radical polymerization and cationic polymerization.
The radical polymerization initiator may be one that can release a substance that initiates radical polymerization by at least one of irradiation with active energy rays and heating. Examples of the thermal radical polymerization initiator include organic peroxides such as hydrogen peroxide and perbenzoic acid, and azo compounds such as azobisbutyronitrile.
The active energy ray radical polymerization initiator includes a Type1 radical polymerization initiator which generates radicals by decomposition of molecules and a Type2 radical polymerization initiator which generates radicals in a hydrogen abstraction Type reaction in the coexistence of a tertiary amine, and can be used alone or in combination.
The cationic polymerization initiator may be one that can release a substance that initiates cationic polymerization by at least one of irradiation with active energy rays and heating. As the cationic polymerization initiator, aromatic iodine can be used
Salts, aromatic sulfonium salts, cyclopentadienyl iron (II) complexes, and the like. They may initiate cationic polymerization by either or both of irradiation with active energy rays or heating depending on the structure. The polymerization initiator may be contained in an amount of 0.1 to 10 wt% based on 100 wt% of the entire hard coat composition. When the content of the polymerization initiator is less than 0.1% by weight, curing cannot be sufficiently advanced, and mechanical properties and adhesion of the finally obtained coating film are difficult to be exhibited, and when the content exceeds 10% by weight, poor adhesion, cracking, and curling due to curing shrinkage may occur.
The hard coat composition may further contain one or more selected from a solvent and an additive. The solvent may be used without limitation as long as it is known as a solvent for a hard coat composition in the art because the polymerizable compound and the polymerization initiator can be dissolved or dispersed in the solvent. The above additives may further contain inorganic particles, leveling agents, stabilizers, surfactants, antistatic agents, lubricants, antifouling agents, and the like.
The ratio (t2/t1) of the thickness (t2) of the support body to the thickness (t1) of the hard coat layer is preferably 0.13 to 5.00, more preferably 0.38 to 4.00, and further preferably 0.63 to 3.33.
The laminate of the present invention may have any other form in which functional layers are laminated. For example, the laminate of the present invention may be further provided with a function by laminating a circularly polarizing plate and a touch sensor.
< image display device >
An image display device of the present invention is characterized by comprising the laminate of the present invention. The laminate of the present invention can function as a window film in an image display device.
As the image display device, any known device can be used regardless of the kind. For example, the laminate of the present invention can be suitably used in an organic EL display device. For example, the polarizing plate is preferably used as an antireflection polarizing plate of a flexible organic EL display device. These layers may be laminated with an adhesive or a bonding agent described later interposed therebetween.
< Flexible image display device >
The flexible image display device is configured from a laminate for flexible image display device and an organic EL display panel, and the laminate for flexible image display device is disposed on the visually visible side of the organic EL display panel and is configured so as to be foldable. The laminate for a flexible image display device may contain the laminate of the present invention, a circularly polarizing plate and a touch sensor in any order, but preferably the laminate of the present invention, the circularly polarizing plate, the touch sensor, or the laminate of the present invention, the touch sensor and the circularly polarizing plate are laminated in this order from the visually visible side. The presence of the circularly polarizing plate on the visually-visible side of the touch sensor is preferable because the pattern of the touch sensor is less likely to be observed and the visibility of the displayed image is improved. The members may be laminated using an adhesive, a bonding agent, or the like. The light-shielding pattern may be formed on at least one surface of any one of the laminate, circularly polarizing plate, and touch sensor of the present invention.
The layers (the laminate of the present invention, the circularly polarizing plate, and the touch sensor) forming the laminate for a flexible image display device may be laminated with an adhesive. As the adhesive, a commonly used adhesive such as an aqueous adhesive, an organic solvent adhesive, a solvent-free adhesive, a solid adhesive, a solvent-volatile adhesive, a moisture-curable adhesive, a heat-curable adhesive, an anaerobic curable adhesive, an active energy ray-curable adhesive, a curing agent mixed adhesive, a hot-melt adhesive, a pressure-sensitive adhesive (pressure-sensitive adhesive), and a remoistenable adhesive can be used. Among them, an aqueous solvent volatile adhesive, an active energy ray curable adhesive, and a pressure sensitive adhesive are often used. The thickness of the adhesive layer may be appropriately adjusted depending on the required adhesive strength and the like, and is 0.01 to 500 μm, preferably 0.1 to 300 μm, and a plurality of the adhesive layers may be present in the laminate for a flexible image display device, but the thicknesses and the types may be the same or different.
As the aqueous solvent-based volatile adhesive, a polyvinyl alcohol polymer, a water-soluble polymer such as starch, or a water-dispersed polymer such as an ethylene-vinyl acetate latex or a styrene-butadiene latex can be used as a main agent polymer. In addition to water and the above-mentioned main agent polymer, a crosslinking agent, a silane compound, an ionic compound, a crosslinking catalyst, an antioxidant, a dye, a pigment, an inorganic filler, an organic solvent, and the like may be blended. In the case of bonding with the aqueous solvent volatile adhesive, the aqueous solvent volatile adhesive is injected between the layers to be bonded to bond the layers to be bonded, and then the layers are dried to impart adhesiveness. The thickness of the adhesive layer in the case of using the aqueous solvent-based volatile adhesive may be 0.01 to 10 μm, and preferably 0.1 to 1 μm. When a plurality of layers of the aqueous solvent volatile adhesive are used, the thickness and type of each layer may be the same or different.
The active energy ray-curable adhesive can be formed by curing an active energy ray-curable composition containing a reactive material that forms an adhesive layer by irradiation with an active energy ray. The active energy ray-curable composition may contain at least 1 polymer of a radical polymerizable compound and a cation polymerizable compound similar to those of the hard coat composition. The radical polymerizable compound may be the same kind of compound as used in the hard coat composition, as used in the hard coat composition. As the radical polymerizable compound used in the adhesive layer, a compound having an acryloyl group is preferable. In order to reduce the viscosity of the adhesive composition, it is preferable to include a monofunctional compound.
The cationic polymerizable compound may be the same kind of compound as used in the hard coat composition, similarly to the hard coat composition. As the cationically polymerizable compound used in the active energy ray-curable composition, an epoxy compound is particularly preferable. In order to reduce the viscosity as an adhesive composition, it is preferable to include a monofunctional compound as a reactive diluent.
A polymerization initiator may also be contained in the active energy ray composition. The polymerization initiator is a radical polymerization initiator, a cationic polymerization initiator, a radical and cationic polymerization initiator, and the like, and can be appropriately selected and used. These polymerization initiators are decomposed by at least one of irradiation with active energy rays and heating, and generate radicals or cations to perform radical polymerization and cationic polymerization. An initiator capable of initiating at least one of radical polymerization and cationic polymerization by irradiation with active energy rays as described in the description of the hard coat composition can be used.
The active energy ray-curable composition may further contain an ion scavenger, an antioxidant, a chain transfer agent, an adhesion-imparting agent, a thermoplastic resin, a filler, a flow viscosity modifier, a plasticizer, a defoaming agent solvent, an additive, and a solvent. In the case of bonding with the active energy ray-curable adhesive, the active energy ray-curable composition may be applied to one or both of the layers to be bonded and then bonded, and the active energy ray may be irradiated to either or both of the layers to be bonded to cure the layers to be bonded, thereby bonding the layers. The thickness of the adhesive layer in the case of using the active energy ray-curable adhesive may be 0.01 to 20 μm, and preferably 0.1 to 10 μm. When a plurality of layers of the active energy ray-curable adhesive are used, the thickness of each layer may be the same or different.
The adhesive is classified into an acrylic adhesive, a urethane adhesive, a rubber adhesive, a silicone adhesive, and the like according to the base polymer, and any one of them can be used. In addition to the main polymer, a crosslinking agent, a silane compound, an ionic compound, a crosslinking catalyst, an antioxidant, a tackifier, a plasticizer, a dye, a pigment, an inorganic filler, and the like may be blended in the adhesive. The adhesive layer-bonding layer is formed by dissolving and dispersing the components constituting the adhesive in a solvent to obtain an adhesive composition, applying the adhesive composition to a substrate, and drying the adhesive composition. The adhesive layer may be formed directly or may be transferred to an adhesive layer formed on another substrate. In order to cover the adhesive surface before bonding, a release film is preferably used. The thickness of the adhesive layer in the case of using the active energy ray-curable adhesive may be 0.1 to 500. mu.m, preferably 1 to 300. mu.m. When a plurality of the above-mentioned adhesives are used, the thickness and kind of each layer may be the same or different.
< touch sensor >
A touch sensor is used as an input device. As the touch sensor, various types such as a resistive film type, a surface acoustic wave type, an infrared ray type, an electromagnetic induction type, and a capacitance type have been proposed, and any type may be used. Among them, the electrostatic capacitance system is preferable. The capacitive touch sensor is divided into an active region and an inactive region located at a peripheral portion of the active region. The active region is a region corresponding to a region (display portion) where a screen is displayed on the display panel, and is a region where a user's touch is sensed, and the inactive region is a region corresponding to a region (non-display portion) where the screen is not displayed on the display device. The touch sensor may include: a substrate having a flexible characteristic; a sensing pattern formed on an active region of the substrate; and each sensing line formed in the inactive region of the substrate and used for connecting the sensing pattern with an external driving circuit through a pad (パッド). As the substrate having flexibility, the same material as that of a transparent substrate of a window described later can be used. The substrate of the touch sensor preferably has a toughness of 2000 MPa% or more in order to suppress cracking of the touch sensor. More preferably, the toughness may be 2000MPa to 30000 MPa%.
The sensing pattern may include a 1 st pattern formed in a 1 st direction and a 2 nd pattern formed in a 2 nd direction. The 1 st pattern and the 2 nd pattern are arranged in different directions from each other. The 1 st pattern and the 2 nd pattern are formed on the same layer, and in order to sense a touched position, the patterns must be electrically connected. The 1 st pattern is a form in which the respective cell patterns are connected to each other via a connector, but the 2 nd pattern is a structure in which the respective cell patterns are separated from each other in an island form, and therefore, in order to electrically connect the 2 nd pattern, an additional bridge electrode is required. The sensing pattern may employ a known transparent electrode material. Examples thereof include Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), zinc oxide (ZnO), Indium Zinc Tin Oxide (IZTO), Cadmium Tin Oxide (CTO), PEDOT (poly (3, 4-ethylenedioxythiophene)), Carbon Nanotubes (CNT), graphene, and a metal wire, and these may be used alone or in combination of 2 or more. Preferably, ITO may be used. The metal used for the wire is not particularly limited, and examples thereof include silver, gold, aluminum, copper, iron, nickel, titanium, tellurium, chromium, and the like. They may be used alone or in combination of 2 or more.
The bridge electrode may be formed on the insulating layer via an insulating layer on the sensing pattern, the bridge electrode may be formed on the substrate, and the insulating layer and the sensing pattern may be formed thereon. The bridge electrode may be formed of the same material as the sensing pattern, and may be formed of a metal such as molybdenum, silver, aluminum, copper, palladium, gold, platinum, zinc, tin, titanium, or an alloy of 2 or more of these metals. The 1 st pattern and the 2 nd pattern must be electrically insulated, and thus an insulating layer is formed between the sensing pattern and the bridge electrode. The insulating layer may be formed only between the connector of the 1 st pattern and the bridge electrode, and may be formed in a layer structure covering the sensing pattern. In the latter case, the bridge electrode may be connected to the 2 nd pattern through a contact hole formed in the insulating layer. As a method for appropriately compensating for a difference in transmittance between a pattern region where a pattern is formed and a non-pattern region where no pattern is formed, specifically, a difference in transmittance due to a difference in refractive index of these regions, the touch sensor may further include an optical adjustment layer between the substrate and the electrode, and the optical adjustment layer may include an inorganic insulating substance or an organic insulating substance. The optical adjustment layer may be formed by applying a photocurable composition including a photocurable organic binder and a solvent onto a substrate. The above-mentioned photocurable composition may further comprise inorganic particles. The refractive index of the optical adjustment layer can be increased by the inorganic particles.
The photocurable organic binder may include a copolymer of monomers such as an acrylate monomer, a styrene monomer, and a carboxylic acid monomer. The photocurable organic binder may be a copolymer containing different repeating units such as an epoxy group-containing repeating unit, an acrylate repeating unit, and a carboxylic acid repeating unit.
The inorganic particles may include, for example, zirconia particles, titania particles, alumina particles, and the like. The photocurable composition may further contain various additives such as a photopolymerization initiator, a polymerizable monomer, and a curing assistant.
(light-shielding pattern)
The light shielding pattern may be applied to at least a part of a frame (bezel) or a housing of the flexible image display device. The light shielding pattern allows the wiring disposed at the edge portion of the flexible image display device to be hidden and not easily visible, thereby improving the visibility of the image. The light-shielding pattern may be in the form of a single layer or a plurality of layers. The color of the light-shielding pattern is not particularly limited, and the light-shielding pattern has various colors such as black, white, and metallic colors. The light-shielding pattern may be formed of a pigment for representing color, and a polymer such as acrylic resin, ester resin, epoxy resin, polyurethane, silicone, or the like. They may be used alone or as a mixture of two or more thereof. The light-shielding pattern can be formed by various methods such as printing, photolithography, and inkjet. The thickness of the light-shielding pattern may be 1 μm to 100 μm, preferably 2 μm to 50 μm. Further, it is also preferable to provide a shape such as an inclination in the thickness direction of the light pattern.
(circular polarizing plate)
The circularly polarizing plate is a functional layer having a function of transmitting only a right or left circularly polarized light component by laminating a λ/4 phase difference plate on a linear polarizing plate. For example for: the external light converted into right circularly polarized light and reflected by the organic EL panel to become left circularly polarized light is intercepted, and only the light emitting component of the organic EL is transmitted, thereby suppressing the influence of the reflected light and making the image easy to see.
In order to realize the circular polarization function, the absorption axis of the linear polarizer and the slow axis of the λ/4 phase difference plate need to be 45 ° in theory, but are 45 ± 10 ° in practice. The linearly polarizing plate and the λ/4 phase difference plate do not necessarily need to be stacked adjacently as long as the relationship between the absorption axis and the slow axis satisfies the above range. It is preferable to realize complete circular polarization over the entire wavelength, but this is not necessary in practice, and therefore the circular polarizing plate of the present invention also includes an elliptical polarizing plate. It is also preferable to further laminate a λ/4 phase difference plate on the visually visible side of the linearly polarizing plate to convert the emitted light into circularly polarized light, thereby improving visibility in a state where the polarized sunglasses are worn.
The linearly polarizing plate is a functional layer having a function of passing light vibrating in the transmission axis direction, but cutting polarized light of a vibration component perpendicular thereto. The linear polarizer may be a linear polarizer alone or a linear polarizer including a protective film bonded to at least one surface thereof. The thickness of the linearly polarizing plate may be 200 μm or less, and preferably 0.5 to 100 μm. If the thickness exceeds 200. mu.m, flexibility may be reduced.
The linear polarizer may be a stretched film polarizer produced by dyeing and stretching a polyvinyl alcohol (PVA) film. A dichroic dye such as iodine is adsorbed to a PVA film oriented by stretching, or is stretched in a state of being adsorbed to PVA to orient the dichroic dye, thereby exhibiting polarizing performance. The production of the film-type polarizer may further include steps such as swelling, crosslinking with boric acid, washing with an aqueous solution, and drying. The stretching and dyeing step may be performed by a PVA film alone, or may be performed in a state of being laminated with another film such as polyethylene terephthalate. The PVA film used is preferably 10 to 100 μm and 2 to 10 times the draw ratio.
Further, as another example of the linear polarizer, a liquid crystal coating type polarizer formed by coating a composition containing a liquid crystal compound may be used. The composition may include a liquid crystal compound and a dichroic pigment. The liquid crystal compound may have a property of exhibiting a liquid crystal state, and particularly, it is preferable to have a high-order alignment state such as smectic and the like because it can exhibit high polarizing performance. Further, it preferably has a polymerizable group. The dichroic dye is a dye that exhibits dichroism by being aligned together with the liquid crystal compound, and the dichroic dye itself may have liquid crystallinity or may have a polymerizable group. Any of the compounds in the composition has a polymerizable group. The above composition may further include an initiator, a solvent, a dispersant, a leveling agent, a stabilizer, a surfactant, a crosslinking agent, a silane coupling agent, and the like. The liquid crystal coating type polarizer can be produced by coating a composition containing a liquid crystal compound on an alignment film and curing the composition in a state where the liquid crystal compound is aligned. The liquid crystal coated polarizer can be formed to a thinner thickness than the stretched film type polarizer. The thickness of the liquid crystal coating type polarizer may be 0.5 to 10 μm, preferably 1 to 5 μm.
The alignment film can be produced by, for example, applying an alignment film-forming composition to a base material and imparting alignment properties by rubbing, polarized light irradiation, or the like. The alignment film-forming composition may contain a solvent, a crosslinking agent, an initiator, a dispersant, a leveling agent, a silane coupling agent, and the like, in addition to the alignment agent. Examples of the orientation agent include polyvinyl alcohols, polyacrylates, polyamide acids, and polyimides. In case photo-alignment is applied, it is preferred to use an alignment agent comprising cinnamate groups. The weight average molecular weight of the polymer used as the orientation agent may be 10000 to 1000000. The alignment film is preferably 5nm to 10000nm, and particularly preferably 10 to 500nm, since the alignment regulating force is sufficiently exhibited. The liquid crystal coated polarizer may be peeled from a substrate and transferred to another member, or the substrate may be directly laminated. The substrate preferably also plays a role as a protective film, a retardation plate, or a transparent substrate for a window.
As the protective film, any transparent polymer film may be used, and materials and additives used for the transparent resin film may be used. Cellulose-based films, olefin-based films, acrylic films, and polyester-based films are preferable. The coating-type protective film may be one obtained by coating and curing a cationically curable composition such as an epoxy resin or a radically curable composition such as an acrylate. If necessary, a plasticizer, an ultraviolet absorber, an infrared absorber, a colorant such as a pigment or a dye, a fluorescent brightener, a dispersant, a heat stabilizer, a light stabilizer, an antistatic agent, an antioxidant, a lubricant, a solvent, or the like may be contained. The thickness of the protective film may be 200 μm or less, and preferably 1 μm to 100 μm. If the thickness exceeds 200. mu.m, flexibility may be reduced. It may also function as a transparent resin film.
The λ/4 phase difference plate is a film that provides a phase difference of λ/4 in a direction (in-plane lateral direction of the film) orthogonal to the traveling direction of incident light. The λ/4 retardation plate may be a stretched film type retardation plate produced by stretching a polymer film such as a cellulose film, an olefin film, or a polycarbonate film. If necessary, a retardation adjuster, a plasticizer, an ultraviolet absorber, an infrared absorber, a colorant such as a pigment or a dye, a fluorescent brightener, a dispersant, a heat stabilizer, a light stabilizer, an antistatic agent, an antioxidant, a lubricant, a solvent, and the like may be included. The thickness of the stretched phase difference plate may be 200 μm or less, and preferably 1 μm to 100 μm. If the thickness exceeds 200. mu.m, flexibility may be reduced.
Further, another example of the λ/4 retardation plate may be a liquid crystal coating type retardation plate formed by coating a composition containing a liquid crystal compound. The composition contains a liquid crystal compound having a property of exhibiting a liquid crystal state such as a nematic state, a cholesteric state, or a smectic state. Any compound including a liquid crystal compound in the composition has a polymerizable group. The liquid crystal coating type phase difference plate may further include an initiator, a solvent, a dispersant, a leveling agent, a stabilizer, a surfactant, a crosslinking agent, a silane coupling agent, and the like. The liquid crystal coated retardation plate can be produced by coating a composition containing a liquid crystal compound on an alignment film and curing the composition in a state in which the liquid crystal compound is aligned, as described in the liquid crystal coated polarizer. The liquid crystal coating type phase difference plate can be formed to be thinner in thickness than the stretched film type phase difference plate. The thickness of the liquid crystal coating type polarizing layer may be 0.5 to 10 μm, preferably 1 to 5 μm. The liquid crystal coating type retardation plate may be peeled from a substrate and transferred to another member, or the substrate may be directly laminated. The substrate preferably also plays a role as a protective film, a retardation plate, or a transparent resin film.
In general, the shorter the wavelength, the larger the birefringence, and the longer the wavelength, the more the material showing the smaller birefringence. In this case, since a retardation of λ/4 cannot be realized over the entire visible light region, the in-plane retardation of λ/4 is often designed to be 100 to 180nm, preferably 130 to 150nm, around 560nm, which is high in visibility. Since the visibility can be improved by using the inverse dispersion λ/4 phase difference plate, it is preferable to use a material having a wavelength dispersion characteristic of birefringence opposite to that of the ordinary material for the inverse dispersion λ/4 phase difference plate. As such a material, a material described in japanese patent application laid-open No. 2007-232873 and the like is preferably used in the case of a stretched film type retardation plate, and a material described in japanese patent application laid-open No. 2010-30979 is preferably used in the case of a liquid crystal coating type retardation plate.
As another method, a technique of obtaining a wide-band λ/4 phase difference plate by combining a λ/2 phase difference plate is also known (japanese patent application laid-open No. h 10-90521). The λ/2 phase difference plate is also manufactured by the same material method as the λ/4 phase difference plate. The combination of the stretched film type retardation plate and the liquid crystal coating type retardation plate is arbitrary, but both are preferable because the film thickness can be made thin by using the liquid crystal coating type retardation plate.
For the circularly polarizing plate, a method of laminating a positive C plate is also known in order to improve visibility in an oblique direction (japanese patent application laid-open No. 2014-224837). The positive C plate may be a liquid crystal coating type retardation plate or a stretched film type retardation plate. The phase difference in the thickness direction of the positive C plate is-200 to-20 nm, preferably-140 to-40 nm at a wavelength of 560 nm.
Industrial applicability of the invention
According to the present invention, a laminate comprising a very thin hard coat layer having excellent impact resistance and a transparent resin film, an image display device provided with the laminate, and a method for producing the laminate can be obtained, and therefore, the present invention is useful.
Description of the symbols
1 transparent resin film
Support 2 (No. 1 support)
3 support (No. 2 support)
4 embedding resin layer
5 hard coating
10 laminated body
11 laminated body
12 a laminated body.
Claims (10)
1. A laminate comprising a transparent resin film, a support formed on at least one surface of the transparent resin film, and a hard coat layer formed on the support, wherein the support has a pattern structure.
2. The laminate according to claim 1, wherein the support body has at least one structure selected from a honeycomb structure, a truss structure, a frame structure, a stripe structure, and a round structure.
3. The laminate according to claim 1 or 2, wherein the support has a thickness of 1 μm to 15 μm.
4. The laminate according to any one of claims 1 to 3, wherein the support has a width of 500 to 3000 μm in a plan view.
5. The laminate according to any one of claims 1 to 4, wherein the support is optically isotropic.
6. The laminate according to any one of claims 1 to 5, wherein an embedding resin layer embedding the support is provided on the one surface of the transparent resin film.
7. The laminate according to any one of claims 1 to 6, wherein the support has a compressive modulus of elasticity of 0.01GPa to 8.0GPa at 23 ℃.
8. A laminate comprising the laminate according to any one of claims 1 to 7 and a circularly polarizing plate.
9. An image display device comprising the laminate according to any one of claims 1 to 8.
10. A method of manufacturing a laminate, comprising:
a step of forming a pattern of a resin material on at least one surface of the transparent resin film,
a step of producing a support having a pattern structure by curing the resin material, and
and a step of forming a hard coat layer on the support.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018230635A JP2020095079A (en) | 2018-12-10 | 2018-12-10 | Laminate and image display device using the same |
| JP2018-230635 | 2018-12-10 | ||
| PCT/JP2019/047800 WO2020121965A1 (en) | 2018-12-10 | 2019-12-06 | Laminate and image display device using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113167931A true CN113167931A (en) | 2021-07-23 |
Family
ID=71076845
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980080961.9A Pending CN113167931A (en) | 2018-12-10 | 2019-12-06 | Laminate and image display device using same |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2020095079A (en) |
| KR (1) | KR20210102245A (en) |
| CN (1) | CN113167931A (en) |
| WO (1) | WO2020121965A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2020093397A (en) * | 2018-12-10 | 2020-06-18 | 住友化学株式会社 | Stacked body, and image display device employing same |
| JP7205202B2 (en) * | 2018-12-10 | 2023-01-17 | 住友化学株式会社 | LAMINATED BODY AND IMAGE DISPLAY DEVICE USING THE SAME |
| JP2022102603A (en) * | 2020-12-25 | 2022-07-07 | 住友化学株式会社 | Manufacturing method of laminate with surface protective film, and laminate |
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|---|---|---|---|---|
| JP2005247939A (en) * | 2004-03-02 | 2005-09-15 | Nippon Paper Industries Co Ltd | Hard coat film and method for producing the same |
| JP2013210976A (en) * | 2012-03-30 | 2013-10-10 | Dainippon Printing Co Ltd | Protective body and touch panel module |
| JP2017102407A (en) * | 2015-12-04 | 2017-06-08 | 凸版印刷株式会社 | Hard coat film, polarizing plate and transmissive liquid crystal display using the same, and manufacturing method of hard coat film |
| CN107443645A (en) * | 2016-05-10 | 2017-12-08 | 住友化学株式会社 | The manufacture method of transparent resin film and with transparent resin film layered product manufacture method |
| JP2018128664A (en) * | 2017-02-10 | 2018-08-16 | 日東電工株式会社 | Polarizing film, image display device, and manufacturing method of the polarizing film |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57165802A (en) * | 1981-04-04 | 1982-10-13 | Dainippon Printing Co Ltd | Manufacture of light-shielding plate |
| WO2017119391A1 (en) * | 2016-01-08 | 2017-07-13 | 大日本印刷株式会社 | Optical film, polarizing plate, and image display device |
| JP7112838B2 (en) | 2016-09-30 | 2022-08-04 | 住友化学株式会社 | OPTICAL FILM, LAMINATED FILM USING THE SAME, AND OPTICAL FILM MANUFACTURING METHOD |
-
2018
- 2018-12-10 JP JP2018230635A patent/JP2020095079A/en active Pending
-
2019
- 2019-12-06 KR KR1020217017356A patent/KR20210102245A/en unknown
- 2019-12-06 WO PCT/JP2019/047800 patent/WO2020121965A1/en active Application Filing
- 2019-12-06 CN CN201980080961.9A patent/CN113167931A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005247939A (en) * | 2004-03-02 | 2005-09-15 | Nippon Paper Industries Co Ltd | Hard coat film and method for producing the same |
| JP2013210976A (en) * | 2012-03-30 | 2013-10-10 | Dainippon Printing Co Ltd | Protective body and touch panel module |
| JP2017102407A (en) * | 2015-12-04 | 2017-06-08 | 凸版印刷株式会社 | Hard coat film, polarizing plate and transmissive liquid crystal display using the same, and manufacturing method of hard coat film |
| CN107443645A (en) * | 2016-05-10 | 2017-12-08 | 住友化学株式会社 | The manufacture method of transparent resin film and with transparent resin film layered product manufacture method |
| JP2018128664A (en) * | 2017-02-10 | 2018-08-16 | 日東電工株式会社 | Polarizing film, image display device, and manufacturing method of the polarizing film |
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| KR20210102245A (en) | 2021-08-19 |
| JP2020095079A (en) | 2020-06-18 |
| WO2020121965A1 (en) | 2020-06-18 |
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Application publication date: 20210723 |