WO2015146756A1 - 樹脂発泡体、発泡部材、及び、タッチパネル搭載機器 - Google Patents
樹脂発泡体、発泡部材、及び、タッチパネル搭載機器 Download PDFInfo
- Publication number
- WO2015146756A1 WO2015146756A1 PCT/JP2015/058150 JP2015058150W WO2015146756A1 WO 2015146756 A1 WO2015146756 A1 WO 2015146756A1 JP 2015058150 W JP2015058150 W JP 2015058150W WO 2015146756 A1 WO2015146756 A1 WO 2015146756A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- resin
- resin foam
- touch panel
- pressure
- foam
- Prior art date
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
- C08J9/122—Hydrogen, oxygen, CO2, nitrogen or noble gases
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
-
- 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
- B32B29/00—Layered products comprising a layer of paper or cardboard
- B32B29/002—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B29/007—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to a foam layer
-
- 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
- B32B29/00—Layered products comprising a layer of paper or cardboard
- B32B29/02—Layered products comprising a layer of paper or cardboard next to a fibrous or filamentary layer
-
- 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
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
- B32B5/022—Non-woven fabric
-
- 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
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
- B32B5/20—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material foamed in situ
-
- 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
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
- B32B5/245—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it being a foam layer
-
- 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
- B32B7/06—Interconnection of layers permitting easy separation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0066—Use of inorganic compounding ingredients
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/16—Making expandable particles
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/26—Porous or cellular plastics
-
- 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
-
- 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
- B32B2250/00—Layers arrangement
- B32B2250/02—2 layers
-
- 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
- B32B2250/00—Layers arrangement
- B32B2250/03—3 layers
-
- 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
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/10—Inorganic fibres
- B32B2262/101—Glass fibres
-
- 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
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/10—Inorganic fibres
- B32B2262/106—Carbon fibres, e.g. graphite fibres
-
- 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
- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
- B32B2264/10—Inorganic particles
-
- 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
- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
- B32B2264/10—Inorganic particles
- B32B2264/102—Oxide or hydroxide
-
- 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
- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
- B32B2264/10—Inorganic particles
- B32B2264/104—Oxysalt, e.g. carbonate, sulfate, phosphate or nitrate particles
-
- 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
- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
- B32B2264/10—Inorganic particles
- B32B2264/107—Ceramic
- B32B2264/108—Carbon, e.g. graphite particles
-
- 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
- B32B2266/00—Composition of foam
- B32B2266/02—Organic
- B32B2266/0207—Materials belonging to B32B25/00
-
- 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
- B32B2266/00—Composition of foam
- B32B2266/02—Organic
- B32B2266/0214—Materials belonging to B32B27/00
-
- 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
- B32B2266/00—Composition of foam
- B32B2266/02—Organic
- B32B2266/0214—Materials belonging to B32B27/00
- B32B2266/0221—Vinyl resin
- B32B2266/0228—Aromatic vinyl resin, e.g. styrenic (co)polymers
-
- 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
- B32B2266/00—Composition of foam
- B32B2266/02—Organic
- B32B2266/0214—Materials belonging to B32B27/00
- B32B2266/0221—Vinyl resin
- B32B2266/0235—Vinyl halide, e.g. PVC, PVDC, PVF, PVDF
-
- 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
- B32B2266/00—Composition of foam
- B32B2266/02—Organic
- B32B2266/0214—Materials belonging to B32B27/00
- B32B2266/0242—Acrylic resin
-
- 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
- B32B2266/00—Composition of foam
- B32B2266/02—Organic
- B32B2266/0214—Materials belonging to B32B27/00
- B32B2266/025—Polyolefin
-
- 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
- B32B2266/00—Composition of foam
- B32B2266/02—Organic
- B32B2266/0214—Materials belonging to B32B27/00
- B32B2266/0257—Polyamide
-
- 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
- B32B2266/00—Composition of foam
- B32B2266/02—Organic
- B32B2266/0214—Materials belonging to B32B27/00
- B32B2266/0264—Polyester
-
- 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
- B32B2266/00—Composition of foam
- B32B2266/02—Organic
- B32B2266/0214—Materials belonging to B32B27/00
- B32B2266/0278—Polyurethane
-
- 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
- B32B2266/00—Composition of foam
- B32B2266/02—Organic
- B32B2266/0214—Materials belonging to B32B27/00
- B32B2266/0292—Thermoplastic elastomer
-
- 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
- B32B2266/00—Composition of foam
- B32B2266/06—Open cell foam
-
- 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
- B32B2266/00—Composition of foam
- B32B2266/08—Closed cell foam
-
- 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
- B32B2270/00—Resin or rubber layer containing a blend of at least two different polymers
-
- 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
- B32B2274/00—Thermoplastic elastomer material
-
- 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
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/56—Damping, energy absorption
-
- 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
- B32B2307/70—Other properties
- B32B2307/72—Density
-
- 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
- B32B2307/70—Other properties
- B32B2307/732—Dimensional 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
- B32B2323/00—Polyalkenes
- B32B2323/10—Polypropylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
- B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
- B32B2457/208—Touch screens
-
- 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
- B32B2571/00—Protective equipment
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2201/00—Foams characterised by the foaming process
- C08J2201/02—Foams characterised by the foaming process characterised by mechanical pre- or post-treatments
- C08J2201/03—Extrusion of the foamable blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2201/00—Foams characterised by the foaming process
- C08J2201/02—Foams characterised by the foaming process characterised by mechanical pre- or post-treatments
- C08J2201/032—Impregnation of a formed object with a gas
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/06—CO2, N2 or noble gases
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/08—Supercritical fluid
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2205/00—Foams characterised by their properties
- C08J2205/04—Foams characterised by their properties characterised by the foam pores
- C08J2205/044—Micropores, i.e. average diameter being between 0,1 micrometer and 0,1 millimeter
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2205/00—Foams characterised by their properties
- C08J2205/04—Foams characterised by their properties characterised by the foam pores
- C08J2205/05—Open cells, i.e. more than 50% of the pores are open
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/12—Polypropene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2333/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2333/18—Homopolymers or copolymers of nitriles
- C08J2333/20—Homopolymers or copolymers of acrylonitrile
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/08—Copolymers of ethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2433/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2433/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
- C08J2433/06—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C08J2433/08—Homopolymers or copolymers of acrylic acid esters
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/318—Applications of adhesives in processes or use of adhesives in the form of films or foils for the production of liquid crystal displays
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/302—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/312—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier parameters being the characterizing feature
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2423/00—Presence of polyolefin
- C09J2423/04—Presence of homo or copolymers of ethene
- C09J2423/046—Presence of homo or copolymers of ethene in the substrate
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2423/00—Presence of polyolefin
- C09J2423/10—Presence of homo or copolymers of propene
- C09J2423/106—Presence of homo or copolymers of propene in the substrate
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2433/00—Presence of (meth)acrylic polymer
- C09J2433/006—Presence of (meth)acrylic polymer in the substrate
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2467/00—Presence of polyester
- C09J2467/006—Presence of polyester in the substrate
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
Definitions
- the present invention relates to a resin foam, a foam member, and a touch panel mounted device. Specifically, when used in a touch panel-equipped device, a resin foam that can highly suppress the occurrence of display unevenness in a display unit due to a user's touch operation, a foam member having the resin foam, and the resin foam The present invention relates to a device equipped with a touch panel in which the body is used.
- touch panel-equipped devices having a display panel and equipped with a touch panel, and products incorporating the touch panel-equipped device are widely used.
- touch-panel-equipped devices it is required to protect against external factors such as impacts in order to prevent breakdowns and malfunctions.
- a shock absorbing material cushion material
- a mobile terminal such as a mobile phone
- Patent Documents 1 and 2 it has been proposed to use a shock absorbing material (cushion material) in a mobile terminal such as a mobile phone.
- a shock absorber even if a mobile device falls unintentionally and a strong impact is applied to the mobile device, if the shock absorber is used, the impact on the display panel can be reduced, and the display panel can be broken or cracked. It can be effectively prevented.
- touch-panel-equipped devices are required to solve the problem of display unevenness (ripple blurring pattern) that may occur due to stress applied to the display panel, while responding to the thinning that is progressing remarkably. ing.
- the objective of this invention is providing the resin foam which can suppress generation
- the resin foam used for the touch panel mounted device is a resin foam having a specific 25% compression load, even if the touch panel mounted device is thin, the touch operation of the user is possible. It has been found that the occurrence of display unevenness in the accompanying display portion can be highly suppressed.
- the present invention has been completed based on these findings.
- the present invention is a resin foam obtained by foaming a resin composition containing a resin, and a 25% compression load is 0.1 N / cm 2 or more and 8.0 N / cm 2 or less, and a touch panel mounted device A resin foam characterized by being used in the above.
- the resin is preferably at least one resin selected from the group consisting of polyolefin resins, polyester resins, and acrylic resins.
- the resin foam is preferably obtained by impregnating the resin composition with a high-pressure gas and then foaming the resin composition through a pressure reducing step.
- the resin foam is preferably obtained by impregnating a non-foamed molded article composed of the resin composition with a high-pressure gas and then foaming it through a decompression step.
- the resin foam is preferably obtained by impregnating the molten resin composition with a high-pressure gas and then foaming the resin composition through a decompression step.
- the resin foam is preferably obtained by impregnating with a high-pressure gas and then further heating through a step of reducing the pressure.
- the above gas is preferably an inert gas.
- the above gas is preferably carbon dioxide gas.
- the above gas is preferably in a supercritical state.
- the present invention provides a foamed member having the resin foam.
- the foamed member preferably has an adhesive layer on the resin foam.
- the present invention provides a touch panel-mounted device having the resin foam, a display panel, and a touch panel, wherein the resin foam is disposed in a space on the back side of the display panel. .
- the thickness of the resin foam in the touch panel mounted device is preferably 50 to 300% with respect to the height of the space.
- the area of the back surface of the display panel in the resin foam is 20% or more with respect to the area of the back of the display panel.
- the present invention provides a display panel and a touch panel product having a touch panel, wherein the resin foam is disposed in a space on the back side of the display panel, thereby causing ripples on the display panel during a user's touch operation.
- a method for preventing the occurrence of bleeding patterns is provided.
- the resin foam of the present invention When the resin foam of the present invention is used in a touch panel mounted device, it is possible to highly suppress the occurrence of display unevenness in the display unit associated with the user's touch operation. Furthermore, since the said resin foam is arrange
- FIG. 1 is a disassembled schematic perspective view of an example of a touch panel mounting apparatus. It is an external appearance schematic perspective view of an example of a touchscreen mounting apparatus. It is a schematic sectional drawing of an example of a touchscreen mounting apparatus. It is the upper surface schematic of a stress relaxation tester. It is a schematic sectional drawing of a stress relaxation tester. 3 is a pressure image of pressure acting on pressure-sensitive paper in a confirmation test for occurrence of display unevenness in Example 1. 6 is a pressure image of pressure acting on pressure-sensitive paper in a confirmation test for occurrence of display unevenness in Example 2. 6 is a pressure image of pressure acting on pressure-sensitive paper in a confirmation test for occurrence of display unevenness in Example 3.
- 10 is a pressure image of pressure acting on pressure-sensitive paper in a confirmation test for occurrence of display unevenness in Example 4.
- 10 is a pressure image of pressure acting on pressure-sensitive paper in a confirmation test for occurrence of display unevenness in Example 5.
- 10 is a pressure image of pressure acting on pressure-sensitive paper in a confirmation test for occurrence of display unevenness in Example 6.
- 10 is a pressure image of pressure acting on pressure-sensitive paper in a confirmation test of occurrence of display unevenness in Example 7.
- 6 is a pressure image of pressure acting on pressure-sensitive paper in a confirmation test for occurrence of display unevenness in Comparative Example 1.
- 6 is a pressure image of pressure acting on pressure-sensitive paper in a confirmation test for occurrence of display unevenness in Comparative Example 2.
- FIG. 6 is a graph quantifying the pressure distribution of pressure images of Examples 1 to 4 obtained in a confirmation test of occurrence of display unevenness.
- 8 is a graph quantifying the pressure distribution of pressure images of Examples 5 to 7 obtained in a confirmation test of occurrence of display unevenness. It is the graph which quantified the pressure distribution of the pressure image of the comparative examples 1 and 2 obtained by the confirmation test of display nonuniformity generation
- the resin foam of the present invention is a resin foam obtained by foaming a resin composition containing a resin, and has a 25% compressive load of 0.1 N / cm 2 or more and 8.0 N / cm 2 or less. Used for on-board equipment.
- the resin foam of the present invention has a cell structure (foamed structure).
- the resin foam of the present invention can be obtained by foaming a resin composition.
- the resin composition is a composition containing at least a resin constituting the resin foam.
- the content of the resin in the resin composition is not particularly limited, but is preferably 30% by weight or more, more preferably 50% by weight with respect to the total amount (total weight, 100% by weight) in the resin composition. It is above, More preferably, it is 80 weight% or more.
- the resin foam of the present invention has a 25% compression load (repulsive stress at 25% compression) of 0.1 N / cm 2 or more, preferably 0.2 N / cm 2 or more, more preferably 0.5 N. / Cm 2 or more. Since the resin foam of the present invention has a 25% compression load (repulsive stress at 25% compression) of 0.1 N / cm 2 or more, resistance when compressed (an attempt to push back when compressed) Force) can be obtained sufficiently, and the force can be distributed, and the force applied to the display panel that causes display unevenness can be effectively reduced.
- 25% compressive load of the resin foam of the present invention is a 8.0 N / cm 2 or less, preferably 6.0 N / cm 2 or less, more preferably 3 0.0 N / cm 2 or less, and even more preferably 2.0 N / cm 2 or less. Since the resin foam of the present invention has a 25% compression load (repulsive stress at 25% compression) of 8.0 N / cm 2 or less, it has moderate flexibility and is likely to occur when the resin foam is hard. The transmission of force to the adjacent object can be suppressed, and the force applied to the display panel that causes display unevenness can be effectively reduced.
- the resin foam of the present invention preferably has a 25% compressive load of 2.0 N / cm 2 or less from the viewpoint of obtaining excellent stress relaxation properties while suppressing the occurrence of display unevenness.
- the compressive load of the resin foam of the present invention is 2.0 N / cm 2 or less, stress relaxation performance per unit volume can be obtained to a high degree, so even if the thickness is small or the surface area is small, display unevenness occurs. Can be suppressed to a high degree.
- the 25% compression load is a repulsive force after compressing a sheet-like resin foam in the thickness direction to a height corresponding to 25% of the initial thickness and holding it for 10 seconds at 23 ° C. Measured under an atmosphere of (degrees) and expressed per unit area.
- the density of the resin foam of the present invention is not particularly limited, is preferably 0.020 g / cm 3 or more, more preferably 0.025 g / cm 3 or more, more preferably and a 0.030 g / cm 3 or more, still more preferably 0.035 g / cm 3 or more.
- the density of the resin foam of the present invention is 0.020 g / cm 3 or more, sufficient strength can be easily obtained, and the handleability tends to be good.
- the density of the resin foam of the present invention is not particularly limited, it is preferably 0.48 g / cm 3 or less, more preferably 0.40 g / cm 3 or less, more preferably 0.20 g / cm 3 or less, and even more preferably 0.15 g / cm 3 or less.
- the density of the resin foam of the present invention is 0.48 g / cm 3 or less, the resin foam can be suppressed from becoming hard when deformed, and the occurrence of display unevenness can be effectively suppressed. Moreover, it is also preferable from the point of reducing the 25% compression load of the resin foam.
- the cell structure of the resin foam of the present invention is not particularly limited, and may be any one of a closed cell structure, an open cell structure, and a semi-continuous semi-closed cell structure (a cell structure in which a closed cell structure and an open cell structure are mixed). It's okay.
- the resin foam of the present invention preferably has a semi-continuous semi-closed cell structure from the viewpoint of flexibility, and in particular, a semi-continuous semi-closed cell structure having a closed cell structure part of 40% or less (preferably 30% or less). It is preferable to have.
- the average cell diameter (average cell diameter in the cell structure) of the resin foam of the present invention is not particularly limited, but is preferably 10 ⁇ m or more, more preferably 20 ⁇ m or more. When the average cell diameter of the resin foam of the present invention is 10 ⁇ m or more, it becomes easy to obtain good flexibility and shock absorption, and the occurrence of display unevenness can be more effectively suppressed.
- the average cell diameter is preferably 200 ⁇ m or less, more preferably 150 ⁇ m or less. When the average cell diameter of the resin foam of the present invention is 200 ⁇ m or less, good sealability and dustproofness are easily obtained.
- the average cell diameter is obtained, for example, by taking an enlarged image of the bubble structure portion of the cut surface in the width direction with a digital microscope, obtaining the area of the bubble, and converting the equivalent circle diameter.
- the expansion ratio of the resin foam of the present invention is not particularly limited. From the viewpoint of obtaining good flexibility and shock absorption, effectively suppressing the occurrence of display unevenness, and 25% compression of the resin foam. From the viewpoint of reducing the load, it is preferably 1.5 to 40 times, more preferably 2 to 30 times.
- the expansion ratio is obtained by (density before foaming) / (density after foaming).
- the thickness of the resin foam of the present invention is not particularly limited, but is preferably 0.05 mm or more, more preferably 0.07 mm or more, and further preferably 0.08 mm or more.
- the thickness of the resin foam of the present invention is 0.05 mm or more, even if the display panel or the touch panel is bent, the force applied to the display panel can be reduced, and the occurrence of display unevenness can be effectively suppressed.
- the thickness of the resin foam of the present invention is preferably 2.0 mm or less, more preferably 1.0 mm or less, and even more preferably 0.7 mm or less, from the viewpoint of reducing the thickness of touch-panel-equipped devices. Yes, even more preferably 0.4 mm or less.
- the shape of the resin foam of the present invention is not particularly limited, but is preferably a sheet or a tape. Further, it may be processed into an appropriate shape according to the purpose of use. For example, it may be processed into a linear shape, a circular shape, a polygonal shape, a frame shape (frame shape), or the like by cutting, punching, or the like. Furthermore, from the point of obtaining a desired thickness, slicing processing, heating / compression processing using a hot roll, or the like may be performed.
- the resin constituting the resin foam of the present invention is not particularly limited, but a thermoplastic resin is preferable.
- the thermoplastic resin include polyolefin resin, styrene resin, polyamide resin, polyamideimide, polyurethane, polyimide, polyetherimide, acrylic resin, polyvinyl chloride, polyvinyl fluoride, alkenyl aromatic resin, and polyester. Resin, polycarbonate, polyacetal, polyphenylene sulfide and the like.
- the said resin can be used individually or in combination of 2 or more types.
- the resin when the resin is a copolymer, it may be a random copolymer or a block copolymer.
- the thermoplastic resin also includes “rubber component and / or thermoplastic elastomer component”.
- the "rubber component and / or thermoplastic elastomer component” is not particularly limited, but natural or synthetic rubber such as natural rubber, polyisobutylene, polyisoprene, chloroprene rubber, butyl rubber, nitrile butyl rubber; olefin elastomer; styrene-butadiene- Styrene elastomers such as styrene copolymers, styrene-isoprene-styrene copolymers, and hydrogenated products thereof; polyester elastomers; polyamide elastomers; polyurethane elastomers: various thermoplastic elastomers such as acrylic elastomers It is done.
- the resin constituting the resin foam of the present invention may be only (a) “a thermoplastic resin other than a rubber component and / or a thermoplastic elastomer component”, or (b) “a rubber component and / or a thermoplastic resin”. It may be a “thermoplastic resin other than an elastomer component” and “a rubber component and / or a thermoplastic elastomer component”, or (c) only a “rubber component and / or a thermoplastic elastomer component”.
- the “rubber component and / or thermoplastic elastomer component” is included as the resin constituting the resin foam of the present invention, excellent flexibility and shape following property are easily obtained in the resin foam. Moreover, it is also preferable from the point of reducing the 25% compression load of the resin foam.
- the resin constituting the resin foam of the present invention is (b) “a thermoplastic resin other than a rubber component and / or a thermoplastic elastomer component” and “a rubber component and / or a thermoplastic elastomer component”, “ The ratio of the “thermoplastic resin other than the rubber component and / or the thermoplastic elastomer component” and the “rubber component and / or the thermoplastic elastomer component” is not particularly limited, but the cushioning property of the resin foam, the cell structure of high expansion ratio From the point of obtaining the above, the former: latter (weight basis) is preferably 10:90 to 90:10, more preferably 80:20 to 20:80.
- the resin constituting the resin foam of the present invention is composed of a polyolefin-based resin, a polyester-based resin, and an acrylic-based resin because Tg (glass transition point) is easily adjusted and flexibility at room temperature is easily exhibited. It is preferably at least one resin selected from the group. That is, the resin foam of the present invention is preferably obtained by foaming a resin composition containing at least one resin selected from the group consisting of polyolefin resins, polyester resins, and acrylic resins.
- the polyolefin-based resin is not particularly limited, but low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, polypropylene, a copolymer of ethylene and propylene, ethylene or propylene and other ⁇ -olefins.
- Copolymer eg, butene-1, pentene-1, hexene-1, 4-methylpentene-1, etc.
- ethylene and other ethylenically unsaturated monomers eg, vinyl acetate, acrylic acid, acrylic Acid ester, methacrylic acid, methacrylic acid ester, vinyl alcohol, and the like).
- polyolefin resin can be used individually or in combination of 2 or more types.
- the olefin-based elastomer usually has a structure in which an olefin-based resin such as polyethylene or polypropylene and an olefin-based rubber component such as ethylene-propylene rubber or ethylene-propylene-diene rubber are microphase-separated. May be physically dispersed, or may be a type that is dynamically heat-treated in the presence of a crosslinking agent.
- the olefin elastomer has good compatibility.
- the polyester resin is not particularly limited, and examples thereof include polyalkylene terephthalate resins such as polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polybutylene naphthalate, and polycyclohexane terephthalate. It is done. Moreover, the copolymer obtained by copolymerizing 2 or more types of the said polyalkylene terephthalate type-resin is also mentioned. When the polyalkylene terephthalate resin is a copolymer, it may be a copolymer in any form of a random copolymer, a block copolymer, and a graft copolymer. In addition, examples of the polyester resin include polyester elastomers. In addition, a polyester-type resin can be used individually or in combination of 2 or more types.
- the polyester-based elastomer is not particularly limited as long as it is an elastomer resin having an ester bond site by a reaction (polycondensation) between a polyol component and a polycarboxylic acid component.
- a reaction polycondensation
- aromatic dicarboxylic acid divalent aromatic
- a polyester elastomer resin obtained by condensation polymerization of a carboxylic acid and a diol component.
- aromatic dicarboxylic acid examples include terephthalic acid, isophthalic acid, phthalic acid, naphthalenedicarboxylic acid (for example, 2,6-naphthalenedicarboxylic acid, 1,4-naphthalenedicarboxylic acid, etc.), diphenyl ether dicarboxylic acid, 4,4 Examples include '-biphenyldicarboxylic acid.
- aromatic dicarboxylic acid can be used individually or in combination of 2 or more types.
- diol component examples include ethylene glycol, propylene glycol, trimethylene glycol, 1,4-butanediol (tetramethylene glycol), 2-methyl-1,3-propanediol, 1,5-pentanediol, 2,2-dimethyl-1,3-propanediol (neopentyl glycol), 1,6-hexanediol, 3-methyl-1,5-pentanediol, 2-methyl-2,4-pentanediol, 1,7 -Heptanediol, 2,2-diethyl-1,3-propanediol, 2-methyl-2-propyl-1,3-propanediol, 2-methyl-1,6-hexanediol, 1,8-octanediol, 2-butyl-2-ethyl-1,3-propanediol, 1,3,5-trimethyl-1,3-pe Tandiol, 1,9
- the diol component may be a diol component in a polymer form such as polyether diol or polyester diol.
- the polyether diol include polyether diols such as polyethylene glycol obtained by ring-opening polymerization of ethylene oxide, propylene oxide, tetrahydrofuran and the like, polypropylene glycol, polytetramethylene glycol, and copolyether obtained by copolymerization thereof. Can be mentioned.
- a diol component can be used individually or in combination of 2 or more types.
- polyester elastomer examples include a polyester elastomer that is a block copolymer of a hard segment and a soft segment.
- the polyester-based elastomer is preferably a polyester-based elastomer that is a block copolymer of hard segments and soft segments having both elasticity and flexibility.
- polyester elastomer examples include, for example, (i) the aromatic dicarboxylic acid, and a hydroxyl group and a hydroxyl group among the diol components.
- a polyester formed by polycondensation with a diol component having 2 to 4 carbon atoms in the main chain between them is used as a hard segment, and the aromatic dicarboxylic acid and the hydroxyl group and hydroxyl group of the diol component
- the polyester elastomer to be constituted is preferably a polyester elastomer that is a block copolymer of a hard segment and a soft segment, more preferably.
- Polyester-polyether type copolymer (ii) above formed by polycondensation with an aromatic dicarboxylic acid and a diol component having 2 to 4 carbon atoms in the main chain between the hydroxyl group and the hydroxyl group
- Polyester / polyether type copolymer having a hard segment as a polyester and a soft segment as a polyether More specifically, the polyester / polyether type copolymer of (ii) is a polyester / polyether type block copolymer having polybutylene terephthalate as a hard segment and polyether as a soft segment.
- the acrylic resin is not particularly limited, and examples thereof include acrylic resins such as polymethylmethacrylate (acrylic resins other than acrylic elastomers), acrylic elastomers, and the like. In addition, acrylic resin can be used individually or in combination of 2 or more types.
- the acrylic resin is preferably an acrylic resin formed using a monomer having a homopolymer Tg of ⁇ 10 ° C. or more and a monomer having a homopolymer Tg of less than ⁇ 10 ° C. as essential monomer components.
- glass transition temperature (Tg) when forming a homopolymer means “glass transition temperature (Tg of homopolymer of the monomer)”.
- Tg of homopolymer means “glass transition temperature (Tg of homopolymer of the monomer)”.
- Tg of the homopolymer of the monomer which is not described in the said literature says the value (refer Unexamined-Japanese-Patent No. 2007-51271) obtained by the following measuring methods, for example.
- this homopolymer solution is cast-coated on a release film and dried to produce a test sample (sheet-like homopolymer) having a thickness of about 2 mm.
- This test sample was punched into a disk shape having a diameter of 7.9 mm, sandwiched between parallel plates, and subjected to a shear strain at a frequency of 1 Hz using a viscoelasticity tester (ARES, manufactured by Rheometrics). Viscoelasticity is measured in a shear mode at a heating rate of 150 ° C. and 5 ° C./min, and the peak top temperature of tan ⁇ is defined as Tg of the homopolymer.
- the Tg of the resin (polymer) can also be measured by this method.
- the Tg is, for example, ⁇ 10 ° C. to 250 ° C., preferably 10 to 230 ° C., and more preferably 50 to 200 ° C.
- Examples of monomers having a Tg of ⁇ 10 ° C. or higher as homopolymers described above include (meth) acrylonitrile; amide group-containing monomers such as (meth) acrylamide and N-hydroxyethyl (meth) acrylamide; (meth) acrylic acid; methacrylic acid (Meth) acrylic acid alkyl ester having a homopolymer such as methyl or ethyl methacrylate having a Tg of ⁇ 10 ° C. or higher; (meth) acrylic acid isobornyl; heterocyclic ring-containing vinyl monomer such as N-vinyl-2-pyrrolidone; Examples thereof include hydroxyl group-containing monomers such as ethyl methacrylate.
- (meth) acrylonitrile (especially acrylonitrile) is particularly preferable. If (meth) acrylonitrile (especially acrylonitrile) is used as a monomer having a homopolymer Tg of ⁇ 10 ° C. or higher, the strength of the resin foam can be increased because of the strong intermolecular interaction.
- the Tg is, for example, ⁇ 70 ° C. or more and less than ⁇ 10 ° C., preferably ⁇ 70 ° C. to ⁇ 12 ° C., more preferably ⁇ 65 ° C. to ⁇ 15 ° C. .
- Examples of the homopolymer having a Tg of less than ⁇ 10 ° C. include, for example, (meth) acrylic acid alkyl esters having a homopolymer Tg of less than ⁇ 10 ° C. such as ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, etc. Is mentioned. These can be used individually by 1 type or in combination of 2 or more types. Among these, acrylic acid C 2-8 alkyl ester is particularly preferable.
- the content of the monomer having a Tg of the homopolymer of ⁇ 10 ° C. or more with respect to all monomer components (total amount of monomer components) forming the acrylic resin is, for example, 2 to 30% by weight, and the lower limit is preferably 3%. %, More preferably 4% by weight, and the upper limit is preferably 25% by weight, more preferably 20% by weight. Further, the content of the monomer having a Tg of the homopolymer of less than ⁇ 10 ° C. with respect to all monomer components (total monomer component) forming the acrylic resin is, for example, 70 to 98% by weight, and the lower limit is preferably The upper limit is preferably 97% by weight, more preferably 96% by weight.
- the viscosity of the composition decreases when the emulsion resin composition is foamed by applying mechanical shearing or the like. Many bubbles are likely to be taken into the emulsion, and when the emulsion resin composition containing the bubbles is applied onto a substrate and dried in a stationary state, the composition tends to aggregate and the viscosity is increased. It rises and the bubbles are retained in the composition and hardly diffused to the outside, so that it is possible to obtain a resin foam excellent in foaming characteristics.
- nitrogen atom-containing copolymerizable monomer examples include cyano group-containing monomers such as (meth) acrylonitrile; lactam ring-containing monomers such as N-vinyl-2-pyrrolidone; (meth) acrylamide, N Examples include amide group-containing monomers such as -hydroxyethyl (meth) acrylamide, N-methylolacrylamide, N, N-dimethylacrylamide, N, N-diethylacrylamide, and diacetoneacrylamide. Among these, cyano group-containing monomers such as acrylonitrile and lactam ring-containing monomers such as N-vinyl-2-pyrrolidone are preferable.
- a nitrogen atom containing monomer can be used individually by 1 type or in combination of 2 or more types.
- the content of the nitrogen atom-containing monomer with respect to all monomer components (monomer component total amount) forming the acrylic resin is 2 to 30% by weight is preferable, the lower limit is more preferably 3% by weight, still more preferably 4% by weight, and the upper limit is more preferably 25% by weight, still more preferably 20% by weight.
- acrylic acid C 2-18 alkyl ester in addition to the nitrogen atom-containing monomer, as a monomer component, acrylic acid C 2-18 alkyl ester (particularly acrylic acid C 2 -8 alkyl ester).
- Acrylic acid C 2-18 alkyl ester may be used alone or in combination of two or more.
- the content of acrylic acid C 2-18 alkyl ester (particularly acrylic acid C 2-8 alkyl ester) relative to all monomer components (total monomer component) forming the acrylic resin is as follows: 70 to 98% by weight is preferable, the lower limit thereof is more preferably 75% by weight, still more preferably 80% by weight, and the upper limit thereof is more preferably 97% by weight, still more preferably 96% by weight.
- the styrene resin is not particularly limited, and examples thereof include polystyrene and acrylonitrile-butadiene-styrene copolymer (ABS resin). Other examples include styrene-based elastomers such as styrene-butadiene-styrene copolymers, styrene-isoprene-styrene copolymers, and hydrogenated products thereof. In addition, a styrene resin can be used individually or in combination of 2 or more types.
- the polyamide-based resin is not particularly limited, and examples thereof include 6-nylon, 66-nylon, and 12-nylon. Other examples include polyamide elastomers.
- a polyamide-type resin can be used individually or in combination of 2 or more types.
- the polycarbonate is not particularly limited, and examples thereof include bisphenol A polycarbonate.
- a polycarbonate can be used individually or in combination of 2 or more types.
- the resin foam of the present invention can be obtained by foaming a resin composition containing the above resin, but the resin composition may contain additives as necessary in addition to the resin. Good.
- an additive can be used individually or in combination of 2 or more types.
- the resin composition preferably contains powder particles as a foam nucleating agent from the viewpoint of obtaining a good foamed state, a cell structure having a high expansion ratio, and reducing the 25% compression load of the resin foam.
- Such powder particles are not particularly limited.
- grains can be used individually or in combination of 2 or more types.
- the average particle diameter of the powder particles is not particularly limited, but is preferably 0.1 to 20 ⁇ m.
- a function as a foam nucleating agent can be sufficiently obtained, and when the average particle diameter of the powder particles is 20 ⁇ m or less, outgassing during foaming can be achieved. It is because generation
- the amount of the powder particles in the resin composition is not particularly limited, but is preferably 0.1 parts by weight or more, more preferably 1 part by weight or more, further preferably 100 parts by weight of the resin. Is 2 parts by weight or more. When the amount of the powder particles is 0.1 parts by weight or more, a uniform foam can be easily obtained.
- the amount of the powder particles is preferably 150 parts by weight or less, more preferably 130 parts by weight or less, and further preferably 50 parts by weight or less with respect to 100 parts by weight of the resin. When the amount of the powder particles is 150 parts by weight or less, the viscosity of the resin composition can be easily suppressed from being significantly increased, and the occurrence of a problem that gas is lost during foam formation to impair foaming characteristics can be suppressed. This is because it becomes easier.
- the resin foam of the present invention is used for touch panel-mounted devices, flame retardancy may be required.
- the said resin composition used for formation of the resin foam of this invention may contain the flame retardant.
- a flame retardant for example, an inorganic flame retardant is mentioned preferably.
- a flame retardant can be used individually or in combination of 2 or more types.
- the inorganic flame retardant is not particularly limited, and examples thereof include a brominated flame retardant, a chlorine flame retardant, a phosphorus flame retardant, and an antimony flame retardant.
- chlorinated flame retardants and brominated flame retardants generate gas components that are harmful to the human body and corrosive to equipment during combustion.
- Phosphorus flame retardants and antimony flame retardants are harmful.
- There are problems such as sexuality and explosiveness. Therefore, as said inorganic flame retardant, a non-halogen non-antimony inorganic flame retardant is mentioned more suitably.
- non-halogen-nonantimony inorganic flame retardant examples include hydrated metal compounds such as aluminum hydroxide, magnesium hydroxide, magnesium oxide / nickel oxide hydrate, magnesium oxide / zinc oxide hydrate, and the like. .
- the hydrated metal compound may be surface-treated.
- the amount of the flame retardant in the resin composition is not particularly limited, but is preferably 5 parts by weight or more, more preferably 7 parts by weight or more with respect to 100 parts by weight of the resin from the viewpoint of obtaining a sufficient flame retardant effect. More preferably, it is 10 parts by weight or more.
- the amount of the flame retardant is preferably 130 parts by weight or less, more preferably 120 parts by weight or less with respect to 100 parts by weight of the resin, from the viewpoint of obtaining a high foaming ratio.
- the resin composition used for the formation of the resin foam of the present invention may contain additives as necessary within a range not impairing the effects of the present invention.
- plasticizers lubricants, colorants (pigments, dyes, etc.), UV absorbers, antioxidants, anti-aging agents, fillers, reinforcing agents, antistatic agents, surfactants, tension modifiers Agents, shrinkage inhibitors, fluidity modifiers, vulcanizing agents, surface treating agents and the like.
- the method for producing the resin composition is not particularly limited, and examples thereof include kneading the resin and the additive used as necessary. Further, heat may be applied during kneading.
- a resin solution obtained by dissolving the resin in a solvent may be used as the resin composition, or an emulsion (emulsion resin composition) containing the resin may be used.
- the resin constituting the resin foam of the present invention is an acrylic resin
- an emulsion you may blend and use 2 or more types of emulsion.
- a higher solid content concentration of the emulsion is preferable from the viewpoint of film formability.
- the solid content concentration of the emulsion is preferably 30% by weight or more, more preferably 40% by weight or more, and further preferably 50% by weight or more.
- the melt flow rate (MFR) at 190 ° C. of the resin composition is not particularly limited, but is preferably 5 to 50 g / 10 min, more preferably from the viewpoint of moldability of the resin composition and ease of obtaining a uniform cell structure. Is 7 to 40 g / 10 min.
- MFR at 190 ° C. refers to MFR measured at a temperature of 190 ° C. and a load of 21.6 kgf based on ISO 1133 (JIS K 7210).
- the resin foam of the present invention can be obtained by foaming the resin composition, but the foaming method of the resin composition is not particularly limited.
- Examples of the foaming method of such a resin composition include a physical foaming method (foaming method in which bubbles are dispersed by a physical method) and a chemical foaming method (foaming method by a chemical method).
- a physical foaming method in which bubbles are dispersed by a physical method
- a chemical foaming method in which a foaming agent gas
- ozone layer destruction there is a concern about the impact on the environment such as flammability and toxicity of substances used as a foaming agent (foaming agent gas) and ozone layer destruction.
- the chemical foaming method the residue of the foaming gas generated by the foaming agent remains in the foam, so in applications where demand for low pollution is high, contamination by corrosive gas or impurities in the gas is a problem. It may become.
- both the physical foaming method and the chemical foaming method it is difficult to form a fine cell structure, and it is particularly difficult to form fine bubbles of 300 ⁇ m or less.
- the resin foam of the present invention is preferably obtained by impregnating the above resin composition with a high-pressure gas and then foaming it through a step of reducing pressure (step of releasing pressure). If this method is used, a fine cell structure can be easily formed in the resin foam.
- an inert gas is preferable from the viewpoints of flammability, toxicity, environmental impact, and ease of obtaining a clean foam free from impurities.
- the inert gas is a gas that is inert to the resin composition and can be impregnated, and examples thereof include carbon dioxide gas (carbon dioxide gas), nitrogen gas, helium, and air.
- the gas may be used as a mixture.
- carbon dioxide gas is preferable because it has a large amount of impregnation and a high impregnation rate.
- the gas for example, the inert gas, particularly carbon dioxide gas
- the gas is preferably in a supercritical state.
- the solubility of the gas in the resin composition increases and high concentration can be mixed.
- the pressure drops suddenly after impregnation, since it is possible to impregnate at a high concentration as described above, the generation of bubble nuclei increases, and the density of bubbles formed by the growth of the bubble nuclei has a porosity. Even if they are the same, they become larger, so that fine bubbles can be obtained.
- Carbon dioxide has a critical temperature of 31 ° C. and a critical pressure of 7.4 MPa.
- the resin foam of the present invention is preferably obtained by impregnating the above-mentioned resin composition with a high-pressure gas and then foaming it through a step of reducing the pressure.
- the product is molded into an appropriate shape such as a sheet to obtain an unfoamed resin molded body (unfoamed molded product)
- the unfoamed resin molded body is impregnated with a high-pressure gas to release the pressure.
- a batch system for foaming may be used, or a continuous system in which the resin composition is kneaded with a high-pressure gas under pressure and molded, and simultaneously the pressure is released and molding and foaming are performed simultaneously may be used.
- the case where the resin foam of the present invention is manufactured by a batch method will be described.
- the method for producing the unfoamed resin molded body is not particularly limited.
- a method of molding a resin composition using an extruder such as a single screw extruder or a twin screw extruder
- injecting a resin composition examples include molding using a molding machine.
- the unfoamed resin molded body having a desired shape and thickness can be obtained.
- the unfoamed resin molded body may be manufactured by other molding methods besides extrusion molding, press molding, and injection molding.
- the shape of the unfoamed resin molded body is not limited to a sheet shape, and various shapes are selected according to the application. For example, a sheet shape, a roll shape, a prism shape, a plate shape, and the like can be given.
- the unfoamed resin molded body molded body made of a resin composition
- a pressure-resistant container high-pressure container
- the high-pressure gas may be introduced continuously or discontinuously.
- a heating method for growing bubble nuclei a known or conventional method such as a water bath, an oil bath, a hot roll, a hot air oven, a far infrared ray, a near infrared ray, or a microwave may be employed.
- the resin foam of the present invention may be obtained by impregnating a non-foamed molded article composed of the above resin composition with a high-pressure gas and then foaming it through a pressure reducing step. Moreover, after impregnating the non-foamed molding comprised from the said resin composition with a high pressure gas, you may obtain by heating further through the process of pressure-reducing.
- a resin composition is injected (introduced) with high-pressure gas while kneading using an extruder such as a single-screw extruder or a twin-screw extruder,
- an extruder such as a single-screw extruder or a twin-screw extruder
- the kneading impregnation process in which the resin composition is sufficiently impregnated into the resin composition, the pressure is released by extruding the resin composition through a die provided at the tip of the extruder (usually up to atmospheric pressure), and molding and foaming simultaneously It may be produced by a molding decompression step to be performed.
- a heating step of growing bubbles by heating may be provided.
- the resin foam is obtained by rapidly cooling with cold water or the like to fix the shape.
- an injection molding machine or the like may be used in addition to the extruder.
- the resin foam of the present invention may be obtained by impregnating a melted resin composition with a high-pressure gas and then foaming it through a pressure reducing step. Further, the resin foam of the present invention may be obtained by further heating after impregnating a molten resin composition with a high-pressure gas and then reducing the pressure.
- the mixing amount of the gas is not particularly limited, but is preferably 1 to 10% by weight, more preferably 2%, based on the total amount of the resin composition, for example. ⁇ 8% by weight.
- the pressure when impregnating the unfoamed resin molded body or resin composition with the gas is preferably 3 MPa or more (for example, 3 to 100 MPa), more preferably. Is 4 MPa or more (for example, 4 to 100 MPa).
- the gas pressure is lower than 3 MPa, the bubble growth during foaming is remarkable and the bubble diameter becomes too large. For example, problems such as a decrease in sealing effect and dustproof effect are likely to occur, which is not preferable.
- the temperature when impregnating a non-foamed resin molded article or resin composition with a high-pressure gas in a gas impregnation step in a batch method or a kneading impregnation step in a continuous method can be selected within a wide range, but operability and the like are taken into consideration. In this case, 10 to 350 ° C. is preferable.
- the impregnation temperature when impregnating a sheet-like unfoamed resin molded article with a high-pressure gas is preferably 40 to 300 ° C, more preferably 100 to 250 ° C.
- the temperature at which the high-pressure gas is injected into the resin composition and kneaded is preferably 150 to 300 ° C, more preferably 210 to 250 ° C.
- the temperature during impregnation is preferably 32 ° C. or higher (particularly 40 ° C. or higher) in order to maintain a supercritical state.
- the decompression speed is not particularly limited, but is preferably 5 to 300 MPa / s in order to obtain uniform fine bubbles.
- the heating temperature in the heating step is not particularly limited, but is preferably 40 to 250 ° C, more preferably 60 to 250 ° C.
- a resin foam having a high expansion ratio can be produced, so that a thick resin foam can be obtained.
- the gap of the die attached to the tip of the extruder is as narrow as possible (usually 0.1 to 1.. 0 mm). Therefore, in order to obtain a thick resin foam, the resin composition extruded through a narrow gap must be foamed at a high magnification. Conventionally, a foam that is formed because a high foaming magnification cannot be obtained. Has been limited to a thin thickness (for example, 0.5 to 2.0 mm).
- the method for producing a resin foam produced using a high-pressure gas it is possible to continuously obtain a resin foam having a final thickness of 0.30 to 5.00 mm. It is.
- the resin foam of the present invention can also be obtained by a method of producing a foam through a step (Step A) of foaming the emulsion resin composition by mechanical foaming.
- the foaming device is not particularly limited, and examples thereof include a high-speed shearing method, a vibration method, and a pressurized gas discharge method. Among these, the high-speed shearing method is preferable from the viewpoint of finer bubble diameter and production of a large capacity.
- Bubbles when foamed by mechanical stirring are gas (gas) taken into the emulsion.
- the gas is not particularly limited as long as it is inert to the emulsion, and examples thereof include air, nitrogen, carbon dioxide and the like. Among these, air is preferable from the viewpoint of economy.
- the resin foam of the present invention can be obtained through a step (step B) of applying the foamed emulsion resin composition obtained through the step (A) onto a substrate and drying it.
- it can.
- the peeled plastic film peeleling-treated polyethylene terephthalate film etc.
- the plastic film polyethylene terephthalate film etc.
- a heat conductive layer etc. are mentioned.
- the adhesion between the foam layer and the heat conductive layer can be improved, and the efficiency of the drying process when the foam layer is produced can also be improved.
- Step B a general method can be adopted as a coating method and a drying method.
- Step B includes a pre-drying step B1 for drying the foamed emulsion resin composition applied on the substrate at 50 ° C. or higher and lower than 125 ° C., and then a main drying step B2 for further drying at 125 ° C. or higher and 200 ° C. or lower. It is preferable that
- the preliminary drying step B1 and the main drying step B2 it is possible to prevent the bubbles from being coalesced and the bubbles to burst due to a rapid temperature rise.
- the bubbles are coalesced or ruptured due to a rapid rise in temperature, so that it is significant to provide the preliminary drying step B1.
- the temperature in the preliminary drying step B1 is preferably 50 ° C. or higher and 100 ° C. or lower.
- the time of the preliminary drying step B1 is, for example, 0.5 minutes to 30 minutes, preferably 1 minute to 15 minutes. Moreover, the temperature in this drying process B2 becomes like this.
- the main drying step B2 is, for example, 0.5 minutes to 30 minutes, preferably 1 minute to 15 minutes.
- the resin foam of the present invention has a 25% compressive load of 0.1 N / cm 2 or more and 8.0 N / cm 2 or less, when used in a touch panel mounted device, the display is accompanied by a user's touch operation. Even if the panel or touch panel bends and deforms, the force generated by the deformation can be effectively dispersed and absorbed. Therefore, the resin foam of the present invention can highly suppress the occurrence of display unevenness (ripple-like blurring pattern) in the display portion that may be caused by stress applied to the display panel. For this reason, the resin foam of this invention can be used suitably for a touchscreen mounting apparatus.
- the resin foam is used as an impact absorbing material, a cushioning material, a sealing material or the like.
- the touch panel-equipped device refers to a device having a display panel and equipped with a touch panel.
- the touch panel-equipped device is not particularly limited.
- a mobile phone a smartphone; a personal digital assistant (PDA); a tablet computer; various personal computers (computers) such as a desktop type, notebook type, and tablet type; plasma display, liquid crystal Various displays (monitors) such as displays and electroluminescence displays (organic EL displays); portable game machines; digital audio players; electronic book readers (devices for viewing electronic books, terminals dedicated to electronic books); wearable computers (wearable devices) Digital signage (electronic signage); Automatic teller machines (ATMs); Automatic ticket machines used to sell tickets, various cash vouchers, beverages, food, tobacco, magazines, newspapers, etc. Vending machines; TV receiver (TV); and the like electronic blackboard (interactive whiteboard).
- PDA personal digital assistant
- a tablet computer various personal computers (computers) such as a desktop type, notebook type, and tablet type
- plasma display liquid crystal Various displays (moni
- the resin foam of the present invention may be used as a foam member. That is, the foam member is a member having the resin foam of the present invention.
- the foamed member may be composed of only the resin foam of the present invention, or other layers (particularly, a pressure-sensitive adhesive layer (adhesive layer), a base material layer, etc.) may be formed on the resin foam.
- a stacked structure may be used.
- the foamed member may have a skin layer or a surface heating melt layer.
- the shape of the foamed member is not particularly limited, but a sheet shape (including a film shape) and a tape shape are preferable.
- the foamed member may be processed so as to have a desired shape, thickness, and the like. For example, processing may be performed in various shapes according to the touch panel mounted device used.
- the foamed member preferably has an adhesive layer.
- the foam member when the resin foam is a sheet-like resin foam, the foam member preferably has an adhesive layer on one or both sides of the resin foam.
- a processing mount can be provided on the resin foam via the adhesive layer, and fixing or temporary fixing can be easily performed.
- the pressure-sensitive adhesive forming the pressure-sensitive adhesive layer is not particularly limited.
- an acrylic pressure-sensitive adhesive such as a natural rubber-based pressure-sensitive adhesive, a synthetic rubber-based pressure-sensitive adhesive
- a silicone-based pressure-sensitive adhesive or a polyester-based pressure-sensitive adhesive
- an adhesive examples thereof include an adhesive, a urethane-based adhesive, a polyamide-based adhesive, an epoxy-based adhesive, a vinyl alkyl ether-based adhesive, and a fluorine-based adhesive.
- An adhesive can be used individually or in combination of 2 or more types.
- the pressure-sensitive adhesive may be any form of pressure-sensitive adhesive such as an emulsion-based pressure-sensitive adhesive, a solvent-based pressure-sensitive adhesive, a hot-melt pressure-sensitive adhesive, an oligomer-based pressure-sensitive adhesive, and a solid pressure-sensitive adhesive.
- an acrylic pressure-sensitive adhesive is preferable from the viewpoint of preventing contamination. That is, the foam member preferably has an acrylic pressure-sensitive adhesive layer on the resin foam of the present invention.
- the thickness of the pressure-sensitive adhesive layer is not particularly limited, but is preferably 2 to 100 ⁇ m, more preferably 10 to 100 ⁇ m.
- the thinner the pressure-sensitive adhesive layer the higher the effect of preventing the adhesion of dust and dirt at the end, so the thinner the adhesive layer is preferable.
- the pressure-sensitive adhesive layer may have either a single layer or a laminate.
- the pressure-sensitive adhesive layer may be provided via another layer (lower layer).
- a lower layer include other pressure-sensitive adhesive layers, intermediate layers, undercoat layers, and base material layers (particularly film layers and nonwoven fabric layers).
- the pressure-sensitive adhesive layer may be protected by a release film (separator) (for example, release paper, release film, etc.).
- a touch panel-mounted device includes the resin foam (the resin foam according to the present invention), a display panel, and a touch panel, and the resin foam is disposed in a space on the back side of the display panel. .
- the touch panel is arrange
- the said resin foam is arrange
- the space on the back side of the display panel corresponds to a gap into which the foam is inserted.
- FIG. 1 is an exploded schematic perspective view of an example of a touch panel mounted device of the present invention
- FIG. 2 is an external schematic perspective view of an example of a touch panel mounted device of the present invention
- FIG. 3 is a schematic sectional view of an example of a touch panel mounted device. It is. 3 is a cross-sectional view taken along line A-A ′ of FIG. 2.
- 1 is a touch panel-equipped device
- 11 is a touch panel
- 12 is a display panel
- 13 is a resin foam
- 14 is a casing.
- the surface on which the user recognizes information and performs a touch operation is the surface provided by the touch panel 11 is the front surface (front surface). 1 to 3, the touch panel 11 is disposed in the space on the front surface side of the display panel 12, and the resin foam 13 is disposed in the space on the back surface side of the display panel 12.
- FIG. 3 h shows the height of the space on the back side of the display panel 12 in the touch panel mounted device 1.
- the touch panel-equipped device of the present invention may be hard as a whole without deformation, or may be flexible as a whole. Furthermore, it may be partially flexible.
- the touch panel mounting apparatus of this invention may have the structure where the touch panel, the display panel, and the resin foam are accommodated in the housing
- the touch panel mounting apparatus of this invention may have a circuit board, a window lens, protective glass, various electronic components, a battery, various optical films, various mechanical components etc. as needed.
- the touch panel mounting apparatus of the present invention may have a structure in which the entire surface is a touch panel, or may have a structure in which the surface is partially a touch panel.
- the touch panel mounting apparatus of this invention may have a touch panel only on the surface (front side surface), and has a touch panel on both the surface (front side surface) and the back surface (back side surface). Also good. Furthermore, the touch-panel-equipped device of the present invention may have a plurality of touch panels.
- the touch panel in the touch panel mounted device of the present invention is not particularly limited, and any method may be used.
- a resistive touch panel, a capacitive touch panel, a retroreflective touch panel, an ultrasonic touch panel, an infrared scanning touch panel, an electromagnetic induction touch panel, and the like can be given.
- the touch panel may be equipped with two or more methods.
- the touch panel may be a touch panel on which both a capacitive touch panel and an electromagnetic induction touch panel are mounted.
- the resin foam in the touch panel-mounted device of the present invention is the resin foam of the present invention.
- the resin foam (the resin foam of the present invention) is arranged on the back side of the display panel, the occurrence of display unevenness (ripple blurring pattern) is highly suppressed. Has been.
- the said resin foam acts as an impact-absorbing material, a shock absorbing material, and a sealing material.
- the display panel in the touch panel mounted device of the present invention is not particularly limited, and examples thereof include a liquid crystal display (LCD), an organic EL display (organic electroluminescence display), and a plasma display.
- LCD liquid crystal display
- organic EL display organic electroluminescence display
- plasma display a plasma display.
- the display panel may have a backlight together with the panel portion.
- the liquid crystal display may be composed of a backlight and a liquid crystal panel (liquid crystal shutter).
- the display panel may be a display module having a display driving circuit.
- the display panel may be a liquid crystal module in which a display driving circuit is arranged on a liquid crystal display including a backlight and a liquid crystal panel (liquid crystal shutter).
- the relationship between the thickness of the resin foam and the height of the space on the back side of the display panel is not particularly limited, but the thickness of the resin foam is the space on the back side of the display panel.
- the height is preferably 50% or more, more preferably 75% or more, and still more preferably 100% or more.
- the touch panel-equipped device of the present invention has a structure in which the touch panel, the display panel, and the resin foam are accommodated in the housing, the back side of the display panel that is a gap into which the resin foam is inserted. If the thickness of the resin foam with respect to the space is equal to or greater than the predetermined value, even if the user performs a touch operation and the touch panel is pushed in, the deflection of the touch panel and the display panel will not reach the housing, resulting in the deflection. It is possible to highly suppress the occurrence of display unevenness due to the stress acting on the display panel.
- the thickness of the resin foam is preferably 300% or less, more preferably 250% or less, and even more preferably 200% or less with respect to the height of the space on the back side of the display panel. is there.
- the repulsive force generated by compressing the resin foam is controlled, and the resin foam is compressed. It becomes easy to suppress the occurrence of display unevenness due to the repulsive force accompanying the.
- the area of the surface on the back side of the display panel in the resin foam is not particularly limited. However, from the viewpoint of suppressing impact absorption and display unevenness, the display is performed. It is preferably 20% or more, more preferably 50% or more, and still more preferably 80% or more with respect to the area of the panel back surface.
- the method for preventing the occurrence of ripple-like blurring pattern on the display panel at the time of the user's touch operation is the display panel and the touch panel product having the touch panel.
- a resin foam (the resin foam of the present invention described above) is arranged. If the resin foam is placed on the back side of the display panel, even if the display panel or touch panel bends and deforms due to the user's touch operation, the force generated by the deformation is effectively dispersed / Absorption can be absorbed, and the occurrence of display unevenness (ripple-like blurring pattern) on the display panel can be highly suppressed.
- the touch panel product includes a product using the touch panel mounted device in addition to the touch panel mounted device.
- the said touch panel product is not specifically limited, In addition to the said touch panel mounting apparatus, the household appliances (for example, a vacuum cleaner, a refrigerator, an air cleaner, a washing machine, a microwave oven, an oven, a dishwasher, An air conditioner, a rice cooker, etc.), an acoustic device having the touch panel-equipped device, a car navigation system having the touch panel-equipped device (an electronic device equipped with the car navigation system), a video camera having the touch panel-equipped device, A camcorder having a touch panel-equipped device, a recorder / playback device / recording / reproducing machine (eg, a DVD recorder, a BD recorder, etc.) having the touch panel-equipped device, a digital camera having the touch panel-equipped device, and the touch panel-equipped device.
- the household appliances for example, a vacuum cleaner, a refrigerator, an air cleaner, a washing machine, a microwave oven, an
- machines and devices having the above-mentioned touch-panel-equipped devices for example, analysis devices, manufacturing devices, machine tools, transport machines, Construction machines, agricultural machines, etc.
- pachinko / pachislot machines having the touch panel-equipped device
- arcade game machines having the touch panel-equipped device
- toys having the touch panel-equipped device.
- the apparent density of the pellets was 0.98 g / cm 3 .
- the pellets were put into a single-screw extruder manufactured by Nippon Steel Works, Ltd., and carbon dioxide gas was injected under an atmosphere of 220 ° C. at a pressure of 22 (19 after injection) MPa. After sufficiently saturating the carbon dioxide gas, it was cooled to a temperature suitable for foaming and extruded from a die to obtain a resin foam.
- This resin foam is a sheet-like resin foam having a semi-continuous semi-closed cell structure, an apparent density of 0.035 g / cm 3 , a thickness of 2.0 mm, and an expansion ratio of 28 times.
- Example 1 The resin foam obtained in Production Example 1 of the above resin foam was sliced to obtain a resin foam A having a thickness of 0.3 mm. The 25% compression load of this resin foam A was 0.80 N / cm 2 .
- Example 2 The resin foam A was passed through between a pair of rolls heated to 200 ° C. (a gap between the rolls) to obtain a resin foam having a thickness of 0.2 mm. The gap (gap) between the rolls was set so that a resin foam having a thickness of 0.2 mm was obtained. Next, one roll is 200 ° C. so that the surface opposite to the surface in contact with the roll heated to 200 ° C. is in contact with the roll heated to 200 ° C. The resin foam B having a thickness of 0.1 mm was obtained by passing between the rolls (a gap between the rolls) of the pair of rolls heated to 1 mm. The gap (gap) between the rolls was set so that a resin foam having a thickness of 0.1 mm was obtained. This resin foam B had an apparent density of 0.126 g / cm 3 and a 25% compression load of 1.11 N / cm 2 .
- Example 3 Use polyolefin resin foam (trade name “Bollara XLIM WF03”, thickness: 0.3 mm, 25% compression load: 5.2 N / cm 2 , apparent density: 0.19 g / cm 3 , average cell diameter: 107 ⁇ m) It was.
- Example 4 Polyolefin resin foam (trade name “Bollara XLIM WF01”, thickness: 0.1 mm, 25% compression load: 2.8 N / cm 2 , apparent density: 0.31 g / cm 3 , average cell diameter: 63 ⁇ m) It was.
- Example 5 100 parts by weight of an acrylic emulsion solution (solid content 55 wt%, ethyl acrylate-butyl acrylate-acrylonitrile copolymer (weight ratio 45: 48: 7)), fatty acid ammonium surfactant (aqueous dispersion of ammonium stearate) , Solid content 33 wt%) (surfactant A) 2 parts by weight, carboxybetaine type amphoteric surfactant (trade name “Amogen CB-H”, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) (surfactant B) 2 wt.
- an acrylic emulsion solution solid content 55 wt%, ethyl acrylate-butyl acrylate-acrylonitrile copolymer (weight ratio 45: 48: 7)
- fatty acid ammonium surfactant aqueous dispersion of ammonium stearate
- Solid content 33 wt% surfactant A
- This foamed composition was applied onto a release-treated PET (polyethylene terephthalate) film (thickness: 38 ⁇ m, trade name “MRF # 38”, manufactured by Mitsubishi Plastics, Inc.), 4.5 minutes at 70 ° C., 140 ° C. And dried for 4.5 minutes to obtain a resin foam having an open cell structure with a thickness of 0.3 mm, an apparent density of 0.25 g / cm 3 , a 25% compression load of 0.47 N / cm 2 and an average cell diameter of 76 ⁇ m.
- PET polyethylene terephthalate
- Example 6 100 parts by weight of an acrylic emulsion solution (solid content 55 wt%, ethyl acrylate-butyl acrylate-acrylonitrile copolymer (weight ratio 45: 48: 7)), fatty acid ammonium surfactant (aqueous dispersion of ammonium stearate) , Solid content 33 wt%) (surfactant A) 2 parts by weight, carboxybetaine type amphoteric surfactant (trade name “Amogen CB-H”, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) (surfactant B) 2 wt.
- an acrylic emulsion solution solid content 55 wt%, ethyl acrylate-butyl acrylate-acrylonitrile copolymer (weight ratio 45: 48: 7)
- fatty acid ammonium surfactant aqueous dispersion of ammonium stearate
- Solid content 33 wt% surfactant A
- Example 7 100 parts by weight of an acrylic emulsion solution (solid content 55 wt%, ethyl acrylate-butyl acrylate-acrylonitrile copolymer (weight ratio 45: 48: 7)), fatty acid ammonium surfactant (aqueous dispersion of ammonium stearate) , Solid content 33 wt%) (surfactant A) 2 parts by weight, carboxybetaine type amphoteric surfactant (trade name “Amogen CB-H”, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) (surfactant B) 2 wt.
- an acrylic emulsion solution solid content 55 wt%, ethyl acrylate-butyl acrylate-acrylonitrile copolymer (weight ratio 45: 48: 7)
- fatty acid ammonium surfactant aqueous dispersion of ammonium stearate
- Solid content 33 wt% surfactant A
- This foamed composition was applied onto a release-treated PET (polyethylene terephthalate) film (thickness: 38 ⁇ m, trade name “MRF # 38”, manufactured by Mitsubishi Plastics, Inc.), 4.5 minutes at 70 ° C., 140 ° C. And dried for 4.5 minutes to obtain a resin foam having an open cell structure with a thickness of 0.1 mm, an apparent density of 0.31 g / cm 3 , a 25% compression load of 1.90 N / cm 2 and an average cell diameter of 57 ⁇ m.
- PET polyethylene terephthalate
- Comparative Example 1 A comparative example 1 was obtained by laminating two polyethylene terephthalate films (PET films) having a thickness of 100 ⁇ m.
- Stress relaxation test Using the stress relaxation tester shown below, a sample to be evaluated was inserted into the gap for foam insertion, and the stress relaxation property was evaluated.
- FIG. 4 is a schematic top view of the stress relaxation tester
- FIG. 5 is a schematic sectional view of the stress relaxation tester (cross-sectional view taken along the line BB ′ in FIG. 4).
- 2 is a stress relaxation tester
- 21 is a presser (indenter)
- 22 is a window lens
- 23 is a liquid crystal display (LCD)
- 24 is a pressure sensitive paper
- 25 Is a substrate (base plate)
- 261 and 262 are adhesive tapes
- 27 is a housing.
- an area 28 surrounded by a dotted line indicates a foam insertion space.
- the stress relaxation testing machine 2 has a pressure sensitive paper 24 on the back side of the liquid crystal display 23 and a window lens 22 on the front side of the liquid crystal display 23.
- the casing 27 is disposed on the substrate 25 via the adhesive tape 262, and the window lens 22 is fixed on the casing via the adhesive tape 261.
- the window lens 22, the adhesive tape 261, an adhesive tape 262, a housing 27, and an internal space partitioned by a substrate 28, and a laminate of the liquid crystal display 23 and the pressure sensitive paper 24 is disposed in the internal space.
- a foam insertion space 28 is provided in the internal space below the pressure sensitive paper 24.
- the window lens in this stress relaxation tester can be regarded as a touch panel.
- the pusher 21 has a spherical tip shape with a diameter of 13 mm.
- a double-sided adhesive tape (thickness 300 ⁇ m, trade name “double-sided adhesive tape HJ-90130B”, manufactured by Nitto Denko Corporation) was used.
- a double-sided adhesive tape (thickness 30 ⁇ m, trade name “double-sided adhesive tape No. 5603”, manufactured by Nitto Denko Corporation) was used.
- the thickness of the window lens 22 is 0.8 mm.
- the thickness of the liquid crystal display 23 is 1.7 mm.
- the thickness of the substrate 25 is 5 mm.
- a stress measurement film (trade name “Prescale” (two sheets, for fine pressure (4LW), manufactured by FUJIFILM Corporation, sheet having a surface on which a colored portion is colored, thickness 0.16 mm) was used.
- the casing 27 can be replaced, and the height of the foam insertion gap 28 can be adjusted by adjusting the height of the casing 27.
- FIGS. 6 to 14 are pressure images obtained by digitally processing the discoloration of the pressure sensitive papers of Examples 1 to 7 and Comparative Examples 1 and 2, and visualizing the pressure acting on the pressure sensitive paper.
- 16 analyzes the pressure images of FIGS. 6 to 9, draws a line (corresponding to the line L in FIG. 15) passing through the point where the pressure is most applied (center point, touch panel central part), and the pressure on the line. It is the graph which showed distribution.
- 17 analyzes the pressure images of FIGS. 10 to 12, draws a line (corresponding to the line L in FIG. 15) passing through the point where the pressure is most applied (center point, touch panel central part), and the pressure on the line. It is the graph which showed distribution.
- FIG. 10 to 12 draws a line (corresponding to the line L in FIG. 15) passing through the point where the pressure is most applied (center point, touch panel central part), and the pressure on the line. It is the graph which showed distribution.
- FIG. 18 analyzes the pressure images of FIGS. 13 and 14, draws a line (corresponding to the line L in FIG. 15) passing through the point where the pressure is most applied (center point, touch panel center), and the pressure on that line. It is the graph which showed distribution. In the graphs of FIGS. 16 to 18, the pressure is quantified.
- FIG. 15 is an example showing how a line is drawn on the pressure image.
- Example 1 When comparing the example and the comparative example, the pressure applied to the pressure sensitive paper in the example was smaller than in FIGS. 6 to 14 and 16 to 18. For this reason, the Example was able to evaluate that the stress relaxation property was excellent with respect to the comparative example. Moreover, when the Example was used for the touch panel mounting apparatus, it has confirmed that generation
- the resin foam of the present invention When the resin foam of the present invention is used in a device equipped with a touch panel, even if the display panel or the touch panel bends and deforms due to a user's touch operation, the force generated by the deformation is effectively dispersed. ⁇ Can be absorbed. Therefore, the resin foam of the present invention can highly suppress the occurrence of display unevenness (ripple-like blurring pattern) in the display portion that may be caused by stress applied to the display panel. For this reason, the resin foam of this invention can be used suitably for a touchscreen mounting apparatus. Moreover, the resin foam of this invention is used as an impact-absorbing material, a shock absorbing material, a sealing material, etc.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Materials Engineering (AREA)
- Theoretical Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- Textile Engineering (AREA)
- Inorganic Chemistry (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
Description
さらに、本発明の他の目的は、使用者のタッチ操作に伴う表示部における表示ムラの発生が高度に抑制されているタッチパネル搭載機器を提供することにある。
さらに、本発明のタッチパネル搭載機器は、上記樹脂発泡体が配置されているので、使用者のタッチ操作に伴う表示部における表示ムラの発生が高度に抑制されている。
本発明の樹脂発泡体は、樹脂を含む樹脂組成物を発泡させることにより得られる樹脂発泡体であり、25%圧縮荷重が0.1N/cm2以上8.0N/cm2以下であり、タッチパネル搭載機器に用いられる。本発明の樹脂発泡体は、気泡構造(発泡構造)を有する。
本発明の樹脂発泡体は、発泡部材として用いられてもよい。つまり、上記発泡部材は、上記の本発明の樹脂発泡体を有する部材である。上記発泡部材は、例えば、上記の本発明の樹脂発泡体のみからなる構成であってもよいし、上記樹脂発泡体に他の層(特に粘着剤層(粘着層)、基材層など)が積層されている構成であってもよい。さらには、上記発泡部材は、スキン層や、表面加熱溶融層を有していてもよい。
本発明のタッチパネル搭載機器は、上記樹脂発泡体(上記の本発明の樹脂発泡体)、表示パネル、及び、タッチパネルを有し、表示パネルの背面側のスペースに上記樹脂発泡体が配置されている。本発明のタッチパネル搭載機器では、表示パネルの表面側のスペースにタッチパネルが配置され、表示パネルの背面側のスペースに上記樹脂発泡体が配置されている。なお、表示パネルの背面側のスペースは、発泡体が挿入される隙間に相当する。
本発明における、使用者のタッチ操作時における表示パネルでの波紋状のにじみ模様の発生を防ぐ方法は、表示パネル、及び、タッチパネルを有するタッチパネル製品において、上記表示パネルの背面側のスペースに、上記樹脂発泡体(上記の本発明の樹脂発泡体)を配置することを特徴とする。上記樹脂発泡体が表示パネルの背面側に配置されていると、使用者のタッチ操作に伴い、表示パネルやタッチパネルがたわみ、変形したとしても、この変形に伴い生じた力を効果的に分散・吸収でき、表示パネルでの表示ムラ(波紋状のにじみ模様)の発生を高度に抑制できる。
ポリプロピレン[メルトフローレート(MFR):0.25g/10min]:55重量部、ポリオレフィン系エラストマー[メルトフローレート(MFR):7g/10min、JIS A硬度:79°]:45重量部、カーボンブラック(商品名「旭#35」、旭カーボン株式会社製):6重量部、及び、水酸化マグネシウム(平均粒子径:0.7μm):10重量部を、株式会社日本製鋼所(JSW)製の二軸混練機にて、220℃の温度で混練した後、ストランド状に押出し、水冷後ペレット状に成形した。なお、ペレットの見掛け密度は0.98g/cm3であった。
このペレットを、株式会社日本製鋼所製の単軸押出機に投入し、220℃の雰囲気下、22(注入後19)MPaの圧力で、二酸化炭素ガスを注入した。二酸化炭素ガスを十分飽和させた後、発泡に適した温度まで冷却後、ダイから押出して、樹脂発泡体を得た。
この樹脂発泡体は、半連続半独立気泡構造を有するシート状の樹脂発泡体であり、0.035g/cm3の見掛け密度を有し、2.0mmの厚みを有し、28倍の発泡倍率を有する。また、この樹脂発泡体の平均セル径は、55μmであった。
上記の樹脂発泡体の製造例1で得た樹脂発泡体をスライスして、厚みが0.3mmの樹脂発泡体Aを得た。この樹脂発泡体Aの25%圧縮荷重は0.80N/cm2であった。
一方のロールが200℃に加熱された一対のロールにおけるロール間(ロールとロールの間の隙間)に、上記樹脂発泡体Aを通過させて、厚みが0.2mmの樹脂発泡体を得た。なお、ロール間のギャップ(隙間)は、厚みが0.2mmの樹脂発泡体が得られるように設定した。
次に、この厚みが0.2mmの樹脂発泡体を、200℃に加熱されたロールと接した面と反対側の面が200℃に加熱されたロールに接するように、一方のロールが200℃に加熱された一対のロールにおけるロール間(ロールとロールの間の隙間)に通過させて、厚みが0.1mmの樹脂発泡体Bを得た。なお、ロール間のギャップ(隙間)は、厚みが0.1mmの樹脂発泡体が得られるように設定した。
この樹脂発泡体Bの見掛け密度は0.126g/cm3であり、25%圧縮荷重は1.11N/cm2であった。
ポリオレフィン系樹脂発泡体(商品名「ボラーラXLIM WF03」、厚み:0.3mm、25%圧縮荷重:5.2N/cm2、見掛け密度:0.19g/cm3、平均セル径:107μm)を用いた。
ポリオレフィン系樹脂発泡体(商品名「ボラーラXLIM WF01」、厚み:0.1mm、25%圧縮荷重:2.8N/cm2、見掛け密度:0.31g/cm3、平均セル径:63μm)を用いた。
アクリルエマルション溶液(固形分量55重量%、アクリル酸エチル−アクリル酸ブチル−アクリロニトリル共重合体(重量比45:48:7))100重量部、脂肪酸アンモニウム系界面活性剤(ステアリン酸アンモニウムの水分散液、固形分量33重量%)(界面活性剤A)2重量部、カルボキシベタイン型両性界面活性剤(商品名「アモーゲンCB−H」、第一工業製薬株式会社製)(界面活性剤B)2重量部、オキサゾリン系架橋剤(商品名「エポクロスWS−500」、株式会社日本触媒製、固形分量39重量%)0.35重量部、ポリアクリル酸系増粘剤(アクリル酸エチル−アクリル酸共重合体(アクリル酸20重量%)、固形分量28.7重量%)0.78重量部をディスパー(商品名「ロボミックス」、プライミクス株式会社製)で撹拌混合して起泡化して発泡組成物を得た。この発泡組成物を、剥離処理をしたPET(ポリエチレンテレフタレート)フィルム(厚み:38μm、商品名「MRF#38」、三菱樹脂株式会社製)上に塗布し、70℃で4.5分、140℃で4.5分乾燥させ、厚み0.3mm、見掛け密度0.25g/cm3、25%圧縮荷重0.47N/cm2、平均セル径76μmの連続気泡構造の樹脂発泡体を得た。
アクリルエマルション溶液(固形分量55重量%、アクリル酸エチル−アクリル酸ブチル−アクリロニトリル共重合体(重量比45:48:7))100重量部、脂肪酸アンモニウム系界面活性剤(ステアリン酸アンモニウムの水分散液、固形分量33重量%)(界面活性剤A)2重量部、カルボキシベタイン型両性界面活性剤(商品名「アモーゲンCB−H」、第一工業製薬株式会社製)(界面活性剤B)2重量部、オキサゾリン系架橋剤(商品名「エポクロスWS−500」、株式会社日本触媒製、固形分量39重量%)0.8重量部、ポリアクリル酸系増粘剤(アクリル酸エチル−アクリル酸共重合体(アクリル酸20重量%)、固形分量28.7重量%)0.65重量部をディスパー(商品名「ロボミックス」、プライミクス株式会社製)で撹拌混合して起泡化して発泡組成物を得た。この発泡組成物を、剥離処理をしたPET(ポリエチレンテレフタレート)フィルム(厚み:38μm、商品名「MRF#38」、三菱樹脂株式会社製)上に塗布し、70℃で4.5分、140℃で4.5分乾燥させ、厚み0.2mm、見掛け密度0.28g/cm3、25%圧縮荷重0.92N/cm2、平均セル径72μmの連続気泡構造の樹脂発泡体を得た。
アクリルエマルション溶液(固形分量55重量%、アクリル酸エチル−アクリル酸ブチル−アクリロニトリル共重合体(重量比45:48:7))100重量部、脂肪酸アンモニウム系界面活性剤(ステアリン酸アンモニウムの水分散液、固形分量33重量%)(界面活性剤A)2重量部、カルボキシベタイン型両性界面活性剤(商品名「アモーゲンCB−H」、第一工業製薬株式会社製)(界面活性剤B)2重量部、オキサゾリン系架橋剤(商品名「エポクロスWS−500」、株式会社日本触媒製、固形分量39重量%)4重量部、ポリアクリル酸系増粘剤(アクリル酸エチル−アクリル酸共重合体(アクリル酸20重量%)、固形分量28.7重量%)0.6重量部をディスパー(商品名「ロボミックス」、プライミクス株式会社製)で撹拌混合して起泡化して発泡組成物を得た。この発泡組成物を、剥離処理をしたPET(ポリエチレンテレフタレート)フィルム(厚み:38μm、商品名「MRF#38」、三菱樹脂株式会社製)上に塗布し、70℃で4.5分、140℃で4.5分乾燥させ、厚み0.1mm、見掛け密度0.31g/cm3、25%圧縮荷重1.90N/cm2、平均セル径57μmの連続気泡構造の樹脂発泡体を得た。
厚みが100μmのポリエチレンテレフタレートフィルム(PETフィルム)を2枚重ねたものを、比較例1とした。
なお、下記の(表示ムラの発生の確認試験)や(応力緩和試験)において、フォーム挿入用空隙に何も挿入しない場合を、ブランクとしての「比較例2」とした。
市販のスマートフォンを分解した。このスマートフォンでは、表示パネル下部と筐体との間に空間があり、この空間の高さは、0.2mmであった。この空間をフォーム挿入用空隙とした。
次に、このフォーム挿入用空隙に評価するサンプルを挿入し、再度、分解したスマートフォンを組み立てた。なお、比較例2は、フォーム挿入用空隙に何も挿入しなかった。
スマートフォンを起動し、親指で、画面中央部を押した。この時の力は、およそ20Nであった。そして、表示ムラが発生するか否かを確認し、下記の基準で評価した。
A:表示ムラは発生しない。
B:表示ムラは発生するものの、使用者は、問題なく視認することができ、問題なくスマートフォンを操作することができる。
C:表示ムラにより、視認性に悪影響が生じ、使用者は、スマートフォンの操作に違和感を伴う。
下記に示す応力緩和試験機を用い、フォーム挿入用空隙に評価するサンプルを挿入し、応力緩和性を評価した。
なお、この応力緩和試験機におけるウインドウレンズは、タッチパネルとみなすことができる。
また、応力緩和試験機2では、筐体27は交換が可能であり、筐体27の高さを調節することにより、フォーム挿入用空隙28の高さを調節できる。
なお、比較例2は、フォーム挿入用空隙に何も挿入しなかった。
また、実施例1と実施例3とを対比すると、図6、8、16より、実施例1の方が感圧紙に作用した圧力が小さかった。このため、実施例1は、実施例3に対して、応力緩和性が優れていると評価できた。
さらに、実施例2と実施例4とを対比すると、図7、9、16より、実施例2の方が感圧紙に作用した圧力が小さかった。このため、実施例2は、実施例4に対して、応力緩和性が優れていると評価できた。
11 タッチパネル
12 表示パネル
13 樹脂発泡体
14 筐体
2 応力緩和試験機
21 押子
22 ウインドウレンズ
23 液晶ディスプレイ
24 感圧紙
25 基板
261 粘着テープ
262 粘着テープ
27 筐体
28 フォーム挿入用空隙
Claims (15)
- 樹脂を含む樹脂組成物を発泡させることにより得られる樹脂発泡体であり、25%圧縮荷重が0.1N/cm2以上8.0N/cm2以下であり、タッチパネル搭載機器に用いられることを特徴とする樹脂発泡体。
- 前記樹脂が、ポリオレフィン系樹脂、ポリエステル系樹脂、及びアクリル系樹脂からなる群より選ばれる少なくとも1種の樹脂である請求項1記載の樹脂発泡体。
- 前記樹脂組成物に高圧のガスを含浸させた後、減圧する工程を経て発泡させることにより得られる請求項1又は2記載の樹脂発泡体。
- 前記樹脂組成物から構成される未発泡成形物に、高圧のガスを含浸させた後、減圧する工程を経て発泡させることにより得られる請求項3記載の樹脂発泡体。
- 溶融した前記樹脂組成物に高圧のガスを含浸させた後、減圧する工程を経て発泡させることにより得られる請求項3記載の樹脂発泡体。
- 高圧のガスを含浸させた後、減圧する工程を経て、さらに加熱することにより得られる請求項3~5の何れか1項に記載の樹脂発泡体。
- 前記のガスが、不活性ガスである請求項3~6の何れか1項に記載の樹脂発泡体。
- 前記のガスが、二酸化炭素ガスである請求項7に記載の樹脂発泡体。
- 前記のガスが、超臨界状態である請求項3~8の何れか1項に記載の樹脂発泡体。
- 請求項1~9の何れか1項に記載の樹脂発泡体を有する発泡部材。
- 前記樹脂発泡体上に粘着剤層を有する請求項10記載の発泡部材。
- 請求項1~9の何れか1項に記載の樹脂発泡体、表示パネル、及び、タッチパネルを有し、前記表示パネルの背面側のスペースに前記樹脂発泡体が配置されていることを特徴とするタッチパネル搭載機器。
- 前記樹脂発泡体の厚みが、前記スペースの高さに対して、50~300%である請求項12記載のタッチパネル搭載機器。
- 前記樹脂発泡体における前記表示パネルの背面側の面の面積が、前記表示パネル背面の面積に対して、20%以上である請求項12又は13記載のタッチパネル搭載機器。
- 表示パネル、及び、タッチパネルを有するタッチパネル製品において、前記表示パネルの背面側のスペースに、請求項1~9の何れか1項に記載の樹脂発泡体を配置することにより、使用者のタッチ操作時における表示パネルでの波紋状のにじみ模様の発生を防ぐ方法。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/128,623 US20170121481A1 (en) | 2014-03-26 | 2015-03-12 | Resin foam, foam member, and device with touch screen |
KR1020167029421A KR102315650B1 (ko) | 2014-03-26 | 2015-03-12 | 수지 발포체, 발포 부재 및 터치 패널 탑재 기기 |
CN201580016453.6A CN106133041A (zh) | 2014-03-26 | 2015-03-12 | 树脂发泡体、发泡构件及触摸面板搭载设备 |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014-064660 | 2014-03-26 | ||
JP2014064660 | 2014-03-26 | ||
JP2015023513A JP6689026B2 (ja) | 2014-03-26 | 2015-02-09 | 樹脂発泡体、発泡部材、及び、タッチパネル搭載機器 |
JP2015-023513 | 2015-02-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015146756A1 true WO2015146756A1 (ja) | 2015-10-01 |
Family
ID=54195277
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2015/058150 WO2015146756A1 (ja) | 2014-03-26 | 2015-03-12 | 樹脂発泡体、発泡部材、及び、タッチパネル搭載機器 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20170121481A1 (ja) |
JP (1) | JP6689026B2 (ja) |
KR (1) | KR102315650B1 (ja) |
CN (1) | CN106133041A (ja) |
WO (1) | WO2015146756A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021106913A1 (ja) * | 2019-11-25 | 2021-06-03 | 日東電工株式会社 | 樹脂発泡体 |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101471361B1 (ko) * | 2014-03-18 | 2014-12-11 | (주)앤디포스 | 터치스크린 패널용 양면테이프 및 그 제조방법 |
JP2017190432A (ja) * | 2016-04-15 | 2017-10-19 | Dic株式会社 | 粘着テープ |
CN106847107A (zh) * | 2017-03-03 | 2017-06-13 | 上海天马有机发光显示技术有限公司 | 一种用于显示装置的缓冲层及显示装置 |
JP7295623B2 (ja) * | 2017-09-27 | 2023-06-21 | 積水化学工業株式会社 | ポリオレフィン系樹脂発泡シート及びそれを用いた粘着テープ |
CN110956903B (zh) * | 2018-09-27 | 2022-07-22 | 宏碁股份有限公司 | 显示装置及其制作方法 |
EP3858906A4 (en) * | 2018-09-28 | 2022-06-08 | Sekisui Kasei Co., Ltd. | EXPANDED PARTICLES AND EXPANDED MOLDED ARTICLE |
CN109752387B (zh) * | 2019-01-31 | 2021-08-24 | 成都京东方光电科技有限公司 | 柔性显示面板的缺陷检测方法及系统 |
JP6876086B2 (ja) * | 2019-04-01 | 2021-05-26 | 日精樹脂工業株式会社 | 動作設定装置を備えた射出成形機 |
US20220185982A1 (en) * | 2019-04-10 | 2022-06-16 | Nitto Denko Corporation | Flame-retardant foamed object and foam member |
WO2021201200A1 (ja) * | 2020-04-01 | 2021-10-07 | 日本精機株式会社 | タッチ入力装置及びプログラム |
CN111739416A (zh) * | 2020-06-19 | 2020-10-02 | 武汉华星光电半导体显示技术有限公司 | 显示装置 |
CN112011277B (zh) * | 2020-08-31 | 2023-03-31 | 京东方科技集团股份有限公司 | 一种胶带及显示面板的制备方法 |
CN112259010B (zh) * | 2020-10-20 | 2022-08-05 | Oppo广东移动通信有限公司 | 显示屏组件以及电子设备 |
TWI783864B (zh) * | 2022-01-27 | 2022-11-11 | 合泰材料科技股份有限公司 | 低永久壓縮形變的減震墊 |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06337411A (ja) * | 1993-04-01 | 1994-12-06 | Suzuki Sogyo Co Ltd | 液晶表示装置における光錯乱防止構造並びにその製造方法 |
WO2008041617A1 (fr) * | 2006-10-02 | 2008-04-10 | Nitto Denko Corporation | Mousse de résine polyoléfinique et son procédé de production |
JP2010155969A (ja) * | 2008-12-04 | 2010-07-15 | Nitto Denko Corp | 両面粘着テープ |
JP2010260880A (ja) * | 2009-04-09 | 2010-11-18 | Dic Corp | 両面粘着テープ |
JP2012177798A (ja) * | 2011-02-25 | 2012-09-13 | Japan Display Central Co Ltd | 液晶表示装置 |
WO2013054620A1 (ja) * | 2011-10-11 | 2013-04-18 | 日東電工株式会社 | 樹脂発泡体シート及び樹脂発泡複合体 |
WO2013161714A1 (ja) * | 2012-04-27 | 2013-10-31 | 株式会社イノアックコーポレーション | 樹脂発泡体の製造方法および樹脂発泡体 |
WO2013187372A1 (ja) * | 2012-06-11 | 2013-12-19 | 日東電工株式会社 | 樹脂発泡体及び発泡シール材 |
WO2014156642A1 (ja) * | 2013-03-25 | 2014-10-02 | Dic株式会社 | 粘着テープ及び電子機器 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5353786B2 (ja) | 2010-03-26 | 2013-11-27 | 富士通モバイルコミュニケーションズ株式会社 | 携帯端末 |
JP5508115B2 (ja) * | 2010-04-26 | 2014-05-28 | 日東電工株式会社 | 樹脂発泡体及び発泡部材 |
KR20140025363A (ko) * | 2011-03-28 | 2014-03-04 | 세키스이가세이힝코교가부시키가이샤 | 폴리올레핀계 수지 발포체 및 그것을 사용한 폴리올레핀계 수지 발포 방진재 |
JP5899027B2 (ja) * | 2011-03-31 | 2016-04-06 | 積水化学工業株式会社 | 架橋ポリオレフィン系樹脂発泡シート、粘着テープ及びシール材 |
JP5777384B2 (ja) * | 2011-04-14 | 2015-09-09 | 富士通コンポーネント株式会社 | タッチパネル |
JP5969260B2 (ja) * | 2011-07-14 | 2016-08-17 | 日東電工株式会社 | 樹脂発泡体、その製造方法、及び発泡シール材 |
CN104284927A (zh) * | 2012-05-11 | 2015-01-14 | 日东电工株式会社 | 树脂发泡体和发泡密封材料 |
JP6039501B2 (ja) * | 2012-05-28 | 2016-12-07 | 日東電工株式会社 | 樹脂発泡体及び発泡部材 |
JP2014017718A (ja) | 2012-07-10 | 2014-01-30 | Sharp Corp | 携帯端末 |
-
2015
- 2015-02-09 JP JP2015023513A patent/JP6689026B2/ja active Active
- 2015-03-12 US US15/128,623 patent/US20170121481A1/en not_active Abandoned
- 2015-03-12 WO PCT/JP2015/058150 patent/WO2015146756A1/ja active Application Filing
- 2015-03-12 KR KR1020167029421A patent/KR102315650B1/ko active IP Right Grant
- 2015-03-12 CN CN201580016453.6A patent/CN106133041A/zh active Pending
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06337411A (ja) * | 1993-04-01 | 1994-12-06 | Suzuki Sogyo Co Ltd | 液晶表示装置における光錯乱防止構造並びにその製造方法 |
WO2008041617A1 (fr) * | 2006-10-02 | 2008-04-10 | Nitto Denko Corporation | Mousse de résine polyoléfinique et son procédé de production |
JP2010155969A (ja) * | 2008-12-04 | 2010-07-15 | Nitto Denko Corp | 両面粘着テープ |
JP2010260880A (ja) * | 2009-04-09 | 2010-11-18 | Dic Corp | 両面粘着テープ |
JP2012177798A (ja) * | 2011-02-25 | 2012-09-13 | Japan Display Central Co Ltd | 液晶表示装置 |
WO2013054620A1 (ja) * | 2011-10-11 | 2013-04-18 | 日東電工株式会社 | 樹脂発泡体シート及び樹脂発泡複合体 |
WO2013161714A1 (ja) * | 2012-04-27 | 2013-10-31 | 株式会社イノアックコーポレーション | 樹脂発泡体の製造方法および樹脂発泡体 |
WO2013187372A1 (ja) * | 2012-06-11 | 2013-12-19 | 日東電工株式会社 | 樹脂発泡体及び発泡シール材 |
WO2014156642A1 (ja) * | 2013-03-25 | 2014-10-02 | Dic株式会社 | 粘着テープ及び電子機器 |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021106913A1 (ja) * | 2019-11-25 | 2021-06-03 | 日東電工株式会社 | 樹脂発泡体 |
WO2021106914A1 (ja) * | 2019-11-25 | 2021-06-03 | 日東電工株式会社 | 樹脂発泡体 |
WO2021106912A1 (ja) * | 2019-11-25 | 2021-06-03 | 日東電工株式会社 | 樹脂発泡体 |
CN114641521A (zh) * | 2019-11-25 | 2022-06-17 | 日东电工株式会社 | 树脂发泡体 |
CN114761473A (zh) * | 2019-11-25 | 2022-07-15 | 日东电工株式会社 | 树脂发泡体 |
Also Published As
Publication number | Publication date |
---|---|
JP6689026B2 (ja) | 2020-04-28 |
CN106133041A (zh) | 2016-11-16 |
KR102315650B1 (ko) | 2021-10-21 |
US20170121481A1 (en) | 2017-05-04 |
KR20160140765A (ko) | 2016-12-07 |
JP2015193793A (ja) | 2015-11-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2015146756A1 (ja) | 樹脂発泡体、発泡部材、及び、タッチパネル搭載機器 | |
JP6251674B2 (ja) | 樹脂発泡体、及び、発泡シール材 | |
JP6039501B2 (ja) | 樹脂発泡体及び発泡部材 | |
JP5676798B1 (ja) | 発泡シート | |
JP5509370B1 (ja) | 樹脂発泡体、発泡部材、発泡部材積層体及び電気又は電子機器類 | |
JP5509369B2 (ja) | 樹脂発泡体及び発泡部材 | |
US20150140315A1 (en) | Resin foam and foam material | |
JP6425973B2 (ja) | 樹脂発泡体及び発泡部材 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 15768539 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 15128623 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 20167029421 Country of ref document: KR Kind code of ref document: A |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 15768539 Country of ref document: EP Kind code of ref document: A1 |