CN117062887A - Elastic sheet with adhesive layer and flexible display device using the same - Google Patents
Elastic sheet with adhesive layer and flexible display device using the same Download PDFInfo
- Publication number
- CN117062887A CN117062887A CN202280015843.1A CN202280015843A CN117062887A CN 117062887 A CN117062887 A CN 117062887A CN 202280015843 A CN202280015843 A CN 202280015843A CN 117062887 A CN117062887 A CN 117062887A
- Authority
- CN
- China
- Prior art keywords
- adhesive layer
- layer
- elastic sheet
- elastomer
- less
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000012790 adhesive layer Substances 0.000 title claims abstract description 102
- 239000010410 layer Substances 0.000 claims abstract description 99
- 229920001971 elastomer Polymers 0.000 claims abstract description 64
- 239000000806 elastomer Substances 0.000 claims abstract description 63
- -1 polyethylene terephthalate Polymers 0.000 claims abstract description 20
- 239000000853 adhesive Substances 0.000 claims abstract description 19
- 230000001070 adhesive effect Effects 0.000 claims abstract description 19
- 229920000139 polyethylene terephthalate Polymers 0.000 claims abstract description 13
- 239000005020 polyethylene terephthalate Substances 0.000 claims abstract description 13
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical group COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 8
- 239000011347 resin Substances 0.000 claims description 8
- 229920005989 resin Polymers 0.000 claims description 8
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical group CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 claims description 7
- 238000005452 bending Methods 0.000 abstract description 25
- 230000037303 wrinkles Effects 0.000 abstract description 17
- NIXOWILDQLNWCW-UHFFFAOYSA-M acrylate group Chemical group C(C=C)(=O)[O-] NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 48
- 239000010408 film Substances 0.000 description 20
- 238000012360 testing method Methods 0.000 description 16
- 239000000463 material Substances 0.000 description 13
- 125000006850 spacer group Chemical group 0.000 description 13
- 238000000034 method Methods 0.000 description 12
- 229920000800 acrylic rubber Polymers 0.000 description 10
- 229920000058 polyacrylate Polymers 0.000 description 10
- 229920001577 copolymer Polymers 0.000 description 7
- 239000000178 monomer Substances 0.000 description 7
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 6
- 229920000728 polyester Polymers 0.000 description 6
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 5
- 239000004721 Polyphenylene oxide Substances 0.000 description 4
- 229920001519 homopolymer Polymers 0.000 description 4
- 229920000570 polyether Polymers 0.000 description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- 239000003522 acrylic cement Substances 0.000 description 3
- 150000001336 alkenes Chemical class 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 229920000428 triblock copolymer Polymers 0.000 description 3
- GOXQRTZXKQZDDN-UHFFFAOYSA-N 2-Ethylhexyl acrylate Chemical compound CCCCC(CC)COC(=O)C=C GOXQRTZXKQZDDN-UHFFFAOYSA-N 0.000 description 2
- 125000000954 2-hydroxyethyl group Chemical group [H]C([*])([H])C([H])([H])O[H] 0.000 description 2
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 2
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical group C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 2
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 2
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 2
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical group CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 2
- 229920006311 Urethane elastomer Polymers 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- 150000001408 amides Chemical class 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N butadiene group Chemical group C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- IBARAOFMHIVQQI-UHFFFAOYSA-N butyl prop-2-enoate;methyl 2-methylprop-2-enoate Chemical compound COC(=O)C(C)=C.COC(=O)C(C)=C.CCCCOC(=O)C=C IBARAOFMHIVQQI-UHFFFAOYSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 2
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 125000002768 hydroxyalkyl group Chemical group 0.000 description 2
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 2
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 description 1
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 description 1
- DPNXHTDWGGVXID-UHFFFAOYSA-N 2-isocyanatoethyl prop-2-enoate Chemical compound C=CC(=O)OCCN=C=O DPNXHTDWGGVXID-UHFFFAOYSA-N 0.000 description 1
- KGIGUEBEKRSTEW-UHFFFAOYSA-N 2-vinylpyridine Chemical compound C=CC1=CC=CC=N1 KGIGUEBEKRSTEW-UHFFFAOYSA-N 0.000 description 1
- DXPPIEDUBFUSEZ-UHFFFAOYSA-N 6-methylheptyl prop-2-enoate Chemical compound CC(C)CCCCCOC(=O)C=C DXPPIEDUBFUSEZ-UHFFFAOYSA-N 0.000 description 1
- CUXGDKOCSSIRKK-UHFFFAOYSA-N 7-methyloctyl prop-2-enoate Chemical compound CC(C)CCCCCCOC(=O)C=C CUXGDKOCSSIRKK-UHFFFAOYSA-N 0.000 description 1
- 229920002943 EPDM rubber Polymers 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical group C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- WHNWPMSKXPGLAX-UHFFFAOYSA-N N-Vinyl-2-pyrrolidone Chemical compound C=CN1CCCC1=O WHNWPMSKXPGLAX-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- IAXXETNIOYFMLW-COPLHBTASA-N [(1s,3s,4s)-4,7,7-trimethyl-3-bicyclo[2.2.1]heptanyl] 2-methylprop-2-enoate Chemical compound C1C[C@]2(C)[C@@H](OC(=O)C(=C)C)C[C@H]1C2(C)C IAXXETNIOYFMLW-COPLHBTASA-N 0.000 description 1
- 150000003926 acrylamides Chemical class 0.000 description 1
- 229920005822 acrylic binder Polymers 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 125000004183 alkoxy alkyl group Chemical group 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 125000001204 arachidyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 1
- 229920001400 block copolymer Polymers 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- LDHQCZJRKDOVOX-NSCUHMNNSA-N crotonic acid Chemical compound C\C=C\C(O)=O LDHQCZJRKDOVOX-NSCUHMNNSA-N 0.000 description 1
- OIWOHHBRDFKZNC-UHFFFAOYSA-N cyclohexyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OC1CCCCC1 OIWOHHBRDFKZNC-UHFFFAOYSA-N 0.000 description 1
- 125000002704 decyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- GMSCBRSQMRDRCD-UHFFFAOYSA-N dodecyl 2-methylprop-2-enoate Chemical compound CCCCCCCCCCCCOC(=O)C(C)=C GMSCBRSQMRDRCD-UHFFFAOYSA-N 0.000 description 1
- 125000005670 ethenylalkyl group Chemical group 0.000 description 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000001530 fumaric acid Substances 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 125000003055 glycidyl group Chemical group C(C1CO1)* 0.000 description 1
- 125000003187 heptyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 229940119545 isobornyl methacrylate Drugs 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-M methacrylate group Chemical group C(C(=C)C)(=O)[O-] CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 125000001421 myristyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- ANISOHQJBAQUQP-UHFFFAOYSA-N octyl prop-2-enoate Chemical compound CCCCCCCCOC(=O)C=C ANISOHQJBAQUQP-UHFFFAOYSA-N 0.000 description 1
- 239000012788 optical film Substances 0.000 description 1
- 125000000913 palmityl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920001610 polycaprolactone Polymers 0.000 description 1
- 239000004632 polycaprolactone Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 125000003011 styrenyl group Chemical group [H]\C(*)=C(/[H])C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 1
- 125000002889 tridecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000002948 undecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic 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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (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
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/02—Physical, chemical or physicochemical properties
- B32B7/022—Mechanical properties
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J201/00—Adhesives based on unspecified macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
-
- 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
- C09J2301/312—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
Abstract
The object of the present disclosure is to provide an elastic sheet with an adhesive layer, which can suppress the occurrence of wrinkles in a bending portion for bending a display or the like with a very small bending radius. An elastic sheet (1) with an adhesive layer is provided with: an elastomer layer (2) having a tensile elastic modulus at 20 ℃ of 80MPa or more and less than 1500MPa, and a tensile elastic modulus at 85 ℃ of 40MPa or more and less than 1000MPa; an adhesive layer (3) which overlaps the elastomer layer (2). The thickness of the adhesive layer (3) is 2 μm or more and 15 μm or less. The adhesive force of the adhesive layer (3) to the polyethylene terephthalate film is more than 10N/25 mm.
Description
Technical Field
The present disclosure relates to an elastic sheet with an adhesive layer and a flexible display device, and more particularly, to an elastic sheet with an adhesive layer including an elastomer layer and an adhesive layer, and a flexible display device using the same.
Background
In display devices used in various electronic apparatuses such as smart phones, tablet terminals, and notebook computers, there are cases where appearance defects occur in an optical film or the like provided on the front surface side of a display. For such a problem, for example, an adhesive composition capable of forming an adhesive layer in which occurrence of lifting and peeling and the like is suppressed even under a high-temperature environment has been studied (see patent document 1).
Recently, in foldable terminals, electronic papers, and the like, displays having flexibility such as organic EL have been increasingly used. However, such flexible displays have the following problems: when bending with a very small bending radius, a fold is generated on the front side of the display at the bending portion.
Prior art literature
Patent literature
Patent document 1: japanese patent application laid-open No. 2017-57382
Disclosure of Invention
The present disclosure provides an elastic sheet with an adhesive layer, which can suppress the occurrence of wrinkles in a bending portion for bending with a very small bending radius for a display or the like, and a flexible display device using the same.
An elastic sheet with an adhesive layer according to one embodiment of the present disclosure includes: an elastomer layer having a tensile elastic modulus at 20 ℃ of 80MPa or more and less than 1500MPa, and a tensile elastic modulus at 85 ℃ of 40MPa or more and less than 1000MPa; and an adhesive layer overlapping the elastomer layer. The thickness of the adhesive layer is 2 μm or more and 15 μm or less. The adhesive force of the adhesive layer to the polyethylene terephthalate film is more than 10N/25 mm.
In one embodiment of the flexible display device of the present disclosure, the elastic sheet with an adhesive layer is attached to a front surface side of a flexible display.
Drawings
Fig. 1 is a schematic cross-sectional view of an elastic sheet with an adhesive layer according to one embodiment of the present disclosure.
Fig. 2 is a schematic cross-sectional view of an elastic sheet with an adhesive layer according to another embodiment of the present disclosure.
Fig. 3 is a schematic cross-sectional view of an elastic sheet with an adhesive layer according to another embodiment of the present disclosure.
Detailed Description
< elastic sheet with adhesive layer >
The elastic sheet with an adhesive layer (hereinafter also referred to as an elastic sheet 1) of the present embodiment includes: an elastomer layer having a tensile elastic modulus at 20 ℃ of 80MPa or more and less than 1500MPa, and a tensile elastic modulus at 85 ℃ of 40MPa or more and less than 1000MPa; and an adhesive layer overlapping the elastomer layer. The thickness of the adhesive layer is 2 μm or more and 15 μm or less. The adhesive force of the adhesive layer to the polyethylene terephthalate film is more than 10N/25 mm.
In a bendable display, when a film such as polyethylene terephthalate or polyimide disposed on the front side of the display (display surface side of the display) is bent, tensile stress and compressive stress are concentrated at the same time, which causes structural deformation and peeling of the film and wrinkles. The present inventors have found that by disposing an elastic sheet with an adhesive layer around the film or the like, tensile stress and compressive stress during bending are relaxed, structural deformation and peeling of the film or the like can be suppressed, and occurrence of wrinkles can be suppressed. In addition, the present inventors have found that there is a correlation between the relaxation of tensile stress and compressive stress and the tensile elastic modulus of the elastomer layer of the elastic sheet 1. That is, it is considered that if the tensile elastic modulus is 80MPa or more and less than 1500MPa at 20 ℃ and 40MPa or more and less than l000MPa at 85 ℃, the stress at the time of bending can be well dispersed under each temperature condition, and the tensile stress and the compressive stress can be sufficiently relaxed at the bending portion. If the tensile elastic modulus is outside the above range in either of 20 ℃ and 85 ℃, there is a possibility that the tensile stress and the compressive stress may not be sufficiently relaxed. In addition, it was found that the thickness of the adhesive layer of the elastic sheet 1 was required to be 2 μm or more and 15 μm or less, and the adhesive force to the polyethylene terephthalate film was required to be 10N/25mm or more. If the thickness of the adhesive layer is less than 2 μm, peeling may occur at the adhesive layer, and if it exceeds 15 μm, structural deformation of the soft adhesive layer may be caused. If the adhesive force is less than 10N/25mm, peeling may occur at the adhesive layer. By making the elastic sheet 1 satisfy all these conditions, generation of wrinkles in, for example, a bent portion having a severe radius of curvature to Φ1.5mm can be suppressed. As described above, according to the present disclosure, it is possible to provide an elastic sheet with an adhesive layer, which can suppress the occurrence of wrinkles in a bent portion for bending with a very small bending radius by using the elastic sheet for a display or the like.
Fig. 1 shows an example of an elastic sheet according to the present embodiment. The elastic sheet 1 of fig. 1 includes an elastic layer 2 and an adhesive layer 3 directly overlapping the elastic layer 2.
[ elastomer layer ]
The tensile elastic modulus of the elastomer layer 2 is 80MPa or more and less than 1500MPa at 20 ℃ and 40MPa or more and less than 1000MPa at 85 ℃. The tensile elastic modulus at 20℃is preferably 100MPa or more, more preferably 150MPa or more, still more preferably 200MPa or more, particularly preferably 300MPa or more. The tensile elastic modulus at 20℃is preferably 1450MPa or less, more preferably 1400MPa or less, still more preferably 1350MPa or less, particularly preferably 1300MPa or less. The tensile elastic modulus at 85℃is preferably 70MPa or more, more preferably 100MPa or more, and still more preferably 150MPa or more. The tensile elastic modulus at 85℃is preferably 900MPa or less, more preferably 800MPa or less, and still more preferably 700MPa or less. By setting the tensile elastic modulus to the above range, the tensile stress and the compressive stress can be further relaxed, and as a result, the occurrence of wrinkles can be further suppressed.
The elastic sheet 1 may have 1 layer of the elastomer layer 2 or may have 2 or more layers, but is usually 1 layer. The shape of the elastomer layer 2 is, for example, a film, a sheet, a plate, or the like.
Here, the tensile elastic modulus of the elastomer layer 2 is a value measured by performing a dynamic viscoelasticity test. In the dynamic viscoelasticity test, test pieces were prepared from the elastomer layer 2, and tensile elastic moduli (MPa) at 20℃and 85℃were measured at a frequency of 10Hz and a heating rate of 5 ℃/min. The method for measuring the modulus of elasticity in tension is described in columns of examples described later.
The flexural modulus of the material constituting the elastomer layer 2 is preferably 100MPa to 2500 MPa. In this case, the tensile stress and the compressive stress can be further relaxed, and as a result, the occurrence of wrinkles can be further suppressed. The flexural modulus is more preferably 300MPa or more, still more preferably 500MPa or more, and particularly preferably 650MPa or more. The flexural modulus is more preferably 2300MPa or less, still more preferably 2100MPa or less, and particularly preferably 1500MPa or less.
Here, the flexural modulus of elasticity of the material constituting the elastomer layer 2 is a value measured under conditions of a ram radius of 5mm and a compression speed of 2mm/min in accordance with JIS-K7171. The method for measuring the flexural modulus is described in columns of examples described below.
The thickness of the elastomer layer 2 is preferably 30 μm or more. In this case, the stress relaxation ability is further improved, and the occurrence of wrinkles can be further suppressed. The thickness is more preferably 40 μm or more, and still more preferably 50 μm or more. The thickness of the elastomer layer 2 is preferably 290 μm or less. In this case, the elastic sheet 1 can be further thinned. The thickness is more preferably 200 μm or less, and still more preferably 100 μm or less.
The material constituting the elastomer layer 2 is not particularly limited as long as the tensile elastic modulus of the elastomer layer 2 is within the above range, and examples thereof include the following elastomers.
Examples of the elastomer include an acrylic elastomer, a urethane elastomer, an olefin elastomer, an amide elastomer, a styrene elastomer, and an ester elastomer.
Examples of the acrylic elastomer include copolymers having a hard segment containing a (meth) acrylate unit, a soft segment containing an acrylonitrile unit, an ethylene unit, a (meth) acrylate unit, and the like. The (meth) acrylate unit includes both an acrylate unit and a methacrylate unit.
Examples of the urethane elastomer include copolymers having a hard segment containing a polyurethane structure, a soft segment containing a polyester structure, a polyether structure, a polycaprolactone structure, and the like.
Examples of the olefin elastomer include polymer alloys in which olefin rubber such as ethylene-propylene rubber and ethylene-propylene-diene terpolymer is dispersed in a matrix of an olefin resin such as polypropylene and polyethylene; the hard segment contains a polybutadiene structure, the soft segment contains a copolymer of a polyether structure, a polyester structure, etc.
Examples of the amide-based elastomer include copolymers having a hard segment comprising a polyamide structure and a soft segment comprising a polyether structure, a polyester structure, and the like.
Examples of the styrene-based elastomer include copolymers having a hard segment containing a styrene unit, a soft segment containing a butadiene unit or a hydrogenated butadiene unit, an isoprene unit or a hydrogenated isoprene unit, and the like.
Examples of the ester-based elastomer include copolymers having a hard segment containing a polyester structure, a soft segment containing a polyether structure, a polyester structure, and the like.
The material constituting the elastomer layer 2 preferably contains an elastomer, and from the viewpoints of adhesion, transparency, and weather resistance, an acrylic elastomer is preferably contained.
Examples of the (meth) acrylate unit of the acrylic elastomer include a methyl (meth) acrylate unit; an ethyl (meth) acrylate unit; propyl (meth) acrylate units such as n-propyl (meth) acrylate units and isopropyl (meth) acrylate units; butyl (meth) acrylate units such as n-butyl (meth) acrylate units, isobutyl (meth) acrylate units, sec-butyl (meth) acrylate units, tert-butyl (meth) acrylate units, and the like; a amyl (meth) acrylate unit; a hexyl (meth) acrylate unit; a cyclohexyl (meth) acrylate unit; a heptyl (meth) acrylate unit; octyl (meth) acrylate units such as n-octyl (meth) acrylate units and 2-ethylhexyl (meth) acrylate units; a (meth) acrylic acid nonyl ester unit; decyl (meth) acrylate units; an undecyl (meth) acrylate unit; dodecyl (meth) acrylate units; tridecyl (meth) acrylate units; a tetradecyl (meth) acrylate unit; cetyl (meth) acrylate units; octadecyl (meth) acrylate units; and alkyl (meth) acrylates such as eicosyl (meth) acrylate units.
The acrylic elastomer may have a unit derived from another monomer in addition to the (meth) acrylate unit. Examples of the other monomer include hydroxyalkyl (meth) acrylates such as 2-hydroxyethyl (meth) acrylate; glycerol di (meth) acrylate, glycidyl (meth) acrylate, 2- (meth) acryloxyethyl isocyanate, (meth) acrylic acid, itaconic acid, maleic anhydride, crotonic acid, maleic acid, fumaric acid, and the like.
The glass transition temperature (Tg) of the homopolymer of the monomer providing the hard segment of the acrylic elastomer is preferably 60℃or higher. The Tg of the homopolymer of the monomer providing the soft segment of the acrylic elastomer is preferably-10℃or lower. Examples of the monomer having a homopolymer Tg of 60℃or higher include methyl methacrylate, cyclohexyl methacrylate, and isobornyl methacrylate. Examples of the monomer having a Tg of-10℃or lower include n-butyl acrylate, 2-ethylhexyl acrylate, isooctyl acrylate, n-octyl acrylate, isononyl acrylate, and lauryl methacrylate.
The proportion of the units constituting the hard segment to the entire units of the acrylic elastomer is preferably 5% by mass or more, more preferably 20% by mass or more, still more preferably 40% by mass or more, and particularly preferably 50% by mass or more. The proportion is preferably 95% by mass or less, more preferably 90% by mass or less, still more preferably 80% by mass or less, particularly preferably 75% by mass or less. By setting the proportion of the hard segment to the above range, the tensile elastic modulus of the elastic layer can be adjusted to a more appropriate value, and as a result, the occurrence of wrinkles can be further suppressed.
From the viewpoint of more excellent adhesion, transparency and weather resistance, the acrylic elastomer preferably contains a resin having butyl acrylate units and methyl methacrylate units, more preferably contains a block copolymer in which the soft segment contains butyl acrylate units and the hard segment contains methyl methacrylate units, and still more preferably contains a triblock copolymer composed of methyl methacrylate block-butyl acrylate block-methyl methacrylate block. The ratio of the butyl acrylate unit to the total units of the resin is preferably 10% by mass or more and 60% by mass or less, more preferably 25% by mass or more and 50% by mass or less. The ratio of the methyl methacrylate unit to the total units of the resin is preferably 40% by mass or more and 90% by mass or less, more preferably 50% by mass or more and 75% by mass or less.
Examples of the commercial products of the acrylic elastomer include kuraritiy LA4286, LA2250, and LA2270 manufactured by Kuraray corporation.
The method for forming the elastomer layer 2 is not particularly limited, and examples thereof include a method in which a material constituting the elastomer layer 2 is dissolved in a solvent, and is applied and dried to obtain a cast film, and a method in which a material constituting the elastomer layer 2 is formed by a T-die method, an inflation film-forming method, or the like to obtain a film.
[ adhesive layer ]
The adhesive layer 3 is disposed so as to overlap with the elastomer layer 2. The elastic sheet 1 may have 1 adhesive layer 3, 2 adhesive layers 3, or 3 or more adhesive layers 3.
The adhesive layer 3 has a shape of, for example, a film, a sheet, a plate, or the like.
The thickness of the adhesive layer 3 is 2 μm or more and 15 μm or less. The thickness of the adhesive layer 3 is preferably 4 μm or more, more preferably 6 μm or more, still more preferably 8 μm or more, and particularly preferably 9 μm or more. In this case, the stress relaxation ability of the elastic sheet 1 is further improved, and as a result, the occurrence of wrinkles can be further suppressed. The thickness of the adhesive layer 3 is preferably 12 μm or less, more preferably 10 μm or less. The thickness of the adhesive layer 3 refers to the thickness of the layer of the adhesive layer 1.
The adhesive force of the adhesive layer 3 to the polyethylene terephthalate film is 10N/25mm or more. The adhesive force is preferably 12N/25mm or more, more preferably 14N/25mm or more, and still more preferably 15N/25mm or more. In this case, the occurrence of wrinkles can be further suppressed.
The adhesive layer 3 may be formed of an adhesive, for example. The adhesive is not particularly limited as long as the adhesive force of the adhesive layer 3 to the polyethylene terephthalate film can be in the above range.
Examples of the binder include an acrylic binder, a urethane binder, and a polyester binder. From the viewpoint of further increasing the adhesive force, the adhesive preferably contains an acrylic adhesive.
Examples of the acrylic pressure-sensitive adhesive include methyl (meth) acrylate; ethyl (meth) acrylate; butyl (meth) acrylate such as n-butyl (meth) acrylate and isobutyl (meth) acrylate; 2-ethylhexyl (meth) acrylate; dodecyl (meth) acrylate; alkyl (meth) acrylates such as octadecyl (meth) acrylate; hydroxyalkyl (meth) acrylates such as 2-hydroxyethyl (meth) acrylate; alkoxyalkyl (meth) acrylates such as methoxyethyl (meth) acrylate and butoxymethyl (meth) acrylate; cyclohexyl (meth) acrylate, phenyl (meth) acrylate, benzyl (meth) acrylate, vinyl acetate; (meth) acrylamides such as (meth) acrylamide and N-methylol (meth) acrylamide; homopolymers or copolymers of monomers such as styrene, acrylonitrile, vinyl pyridine, vinyl pyrrolidone, vinyl alkyl ether, and the like.
The method for forming the adhesive layer 3 is not particularly limited, and examples thereof include a method in which an adhesive is applied to the surface of the elastomer layer 2, a method in which a material constituting the elastomer layer 2 is co-extruded with an adhesive, and the like.
[ other layers ]
The elastic sheet 1 may be provided with other layers in addition to the elastomer layer 2 and the adhesive layer 3. The elastic sheet 1 may have 1 layer or 2 or more other layers. The shape of the other layer is, for example, a film, a sheet, a plate, or the like.
The elastic sheet 1 may include, for example, an impact absorbing layer 5 for absorbing impact and vibration as another layer between the elastic layer 2 and the adhesive layer 3. The elastic sheet 1 may further include a protective layer such as a spacer on the side of the adhesive layer 3 opposite to the elastic layer 2.
[ layer Structure ]
Examples of the layer structure of the elastic sheet with an adhesive layer according to the present embodiment include the following (a) to (1). Hereinafter, the a/B/C symbol indicates, for example, stacking in order of A, B, C from the front of the display device.
(a) Adhesive layer/elastomer layer
(b) Adhesive layer/elastomer layer/adhesive layer
(c) Adhesive layer/impact absorbing layer/elastomer layer
(d) Adhesive layer/impact absorbing layer/elastomer layer/adhesive layer
(e) Adhesive layer/impact absorbing layer/elastomer layer/impact absorbing layer
(f) Adhesive layer/impact absorbing layer/elastomer layer/impact absorbing layer/adhesive layer
(g) Spacer/adhesive/elastomeric layer
(h) Spacer/adhesive layer/elastomer layer/adhesive layer/spacer
(i) Spacer/adhesive/impact absorbing/elastomeric layer
(j) Spacer/adhesive layer/impact absorbing layer/elastomer layer/adhesive layer/spacer
(k) Spacer/adhesive layer/impact absorbing layer/elastomer layer/impact absorbing layer
(1) Spacer/adhesive layer/impact absorbing layer/elastomer layer/impact absorbing layer/adhesive layer/spacer
Fig. 2 shows an elastic sheet with an adhesive layer comprising the layer (h) described above. The elastic sheet 1 of fig. 2 includes an elastic layer 2, 2 adhesive layers 3, 3 directly laminated on both sides of the elastic layer 2, and 2 spacers 4, 4 directly laminated on these adhesive layers 3, 3.
Fig. 3 shows an elastic sheet with an adhesive layer comprising the layer (j) described above. The elastic sheet 1 of fig. 3 includes an elastic layer 2, an impact absorbing layer 5 directly laminated on one surface of the elastic layer 2, 2 adhesive layers 3, 3 directly laminated on one surface of the elastic layer 2 and one surface of the impact absorbing layer 5, and 2 spacers 4, 4 directly laminated on these adhesive layers 3, 3.
The total of the thickness of the elastomer layer 2 and the thickness of the adhesive layer 3 in the elastic sheet 1 is preferably 50 μm or more. In this case, the stress relaxation ability of the elastic sheet 1 can be further improved, and as a result, the occurrence of wrinkles can be further suppressed. The thickness is more preferably 60 μm or more, and still more preferably 70 μm or more. The total is preferably 300 μm or less. In this case, the display device including the display can be further thinned. The total is more preferably 200 μm or less, and still more preferably 100 μm or less.
The thickness of the elastic sheet 1 is preferably 50 μm or more. In this case, the strength of the elastic sheet 1 can be further improved. The thickness is more preferably 60 μm or more, and still more preferably 70 μm or more. The thickness of the elastic sheet 1 is preferably 300 μm or less. In this case, the display device including the display can be further thinned. The thickness is more preferably 200 μm or less, and still more preferably 100 μm or less.
The elastic sheet 1 of the present embodiment can be suitably used for a flexible display. The elastic sheet 1 is preferably used by being disposed on the front surface side of the flexible display, that is, by being bonded to the front surface side of the flexible display, and is more preferably used by being directly laminated on a protective film, coating, or the like of polyethylene terephthalate, polyimide, or the like disposed on the front surface of the display device. By disposing the elastic sheet 1 of the present embodiment on the front surface side of a display device including a flexible display, it is possible to provide a flexible display in which occurrence of wrinkles in a bending portion is suppressed for bending of a display device having a very small bending radius.
Examples
Hereinafter, the present disclosure will be described in more detail by way of examples, but the present disclosure is not limited to these examples at all.
1. Production of elastic sheet with adhesive layer
The materials constituting the elastomer layer and the adhesive layer are as follows.
Material of elastomer layer
Resin a: methyl methacrylate-n-butyl acrylate-methyl methacrylate triblock copolymer. Or a mixed resin of methyl methacrylate-n-butyl acrylate-methyl methacrylate triblock copolymer and polymethyl methacrylate.
The solution of resin a used in each example was prepared as follows: pellets of product numbers LA4285, LA2250, LA2270 and BR-87 of Dianal (mitsubishi chemical company) manufactured by Kuraray corporation were dissolved in solvents, and 2 of the obtained solvents were mixed so as to have respective proportions (mass%) of BA unit (n-butyl acrylate unit) and MMA unit (methyl methacrylate unit) shown in table 1.
Material of the adhesive layer
Acrylic adhesives. And (3) comprehensive grinding of chemical system. Name SK Dyne. Product number SK1717DT. Contains 2-ethylhexyl acrylate, butyl acrylate and 2-hydroxyethyl acrylate.
A solution of the material (resin a) of the elastomer layer prepared above was coated and dried, thereby producing a cast film of the thickness of the elastomer layer shown in table 1, and an elastomer layer was obtained. Next, a material of an adhesive layer (acrylic adhesive) was coated on one side of the elastomer layer and dried, thereby forming an adhesive layer 1 having a thickness shown in table 1. Next, the acrylic adhesive was applied to the surface of the elastomer layer opposite to the adhesive layer 1 in the same manner as described above, and dried to form an adhesive layer having a thickness shown in table 1. Thus, an elastic sheet with an adhesive layer was produced.
2. Evaluation
(1) Tensile elastic modulus of elastomeric layer
An elastic layer was obtained from an elastic sheet with an adhesive layer, and a test piece having a width of 10mm and a length of 20mm was produced from the elastic layer. The test piece was measured for tensile elastic modulus (MPa) at 20℃and 85℃using a dynamic viscoelasticity measuring apparatus (DVA-200, manufactured by IT measurement control Co., ltd.) under conditions of a frequency of 10Hz and a heating rate of 5 ℃/min.
(2) Flexural modulus of elasticity of the material constituting the elastomeric layer
An elastic layer was obtained from an elastic sheet with an adhesive layer, and a test piece having a width of 10mm and a length of 80mm was produced from the elastic layer. The test piece was measured for flexural modulus (MPa) at 23℃under conditions of a ram radius of 5mm and a compression rate of 2mm/min in accordance with JIS-K7171 (method for determining plastic-flexural characteristics).
(3) Adhesion of the adhesive layer to the polyethylene terephthalate film
The adhesion of the adhesive layer to the polyethylene terephthalate film was measured as follows: a polyethylene terephthalate film (thickness: 25 μm, product No. E5100, manufactured by Toyobo Co., ltd.) was laminated to the adhesive layer 1 of the elastic sheet with an adhesive layer to prepare a test piece having a width of 25mm and a length of 100mm, and the test piece was laminated to the elastic sheet according to JIS-Z0237:2009 method for testing adhesive tape and sheet (bonding conditions: 1 reciprocation of 2kg roller, peeling speed: 300mm/min, peeling angle: 180 °), and measurement was performed at 23 ℃.
(4) Bending test
A polyethylene terephthalate film (product No. E5100, manufactured by Toyobo Co., ltd.) was laminated to both sides of the elastic sheet with the adhesive layer, and a sample for a bending test having a width of 20mm and a length of 150mm was produced. The bending test was performed on the sample using a bending test apparatus (manufactured by Yuasa corporation). The bending test conditions were not that the radius of curvature r=2.5 mm, the bending speed 90 times/min, and the number of bending times 1 ten thousand times. The samples after the bending test were visually inspected for the occurrence of wrinkles. The case where wrinkles were not generated was evaluated as "OK", and the case where wrinkles were generated was evaluated as "NG".
TABLE 1
Description of the reference numerals
1 elastic sheet with adhesive layer
2 elastomer layer
3 adhesive layer
4 spacer
5 impact absorbing layer
Claims (6)
1. An elastic sheet with an adhesive layer, comprising:
an elastomer layer having a tensile elastic modulus at 20 ℃ of 80MPa or more and less than 1500MPa, and a tensile elastic modulus at 85 ℃ of 40MPa or more and less than 1000MPa; and
an adhesive layer overlapping the elastomer layer,
the thickness of the adhesive layer is 2 μm or more and 15 μm or less,
the adhesive force of the adhesive layer to the polyethylene terephthalate film is more than 10N/25 mm.
2. The elastic sheet with an adhesive layer according to claim 1, wherein the thickness of the elastomer layer is 50 μm or more and 290 μm or less.
3. The elastic sheet with an adhesive layer according to claim 1 or 2, wherein the total of the thickness of the elastomer layer and the thickness of the adhesive layer is 50 μm or more and 300 μm or less.
4. The elastic sheet with an adhesive layer according to any one of claims 1 to 3, wherein the elastomer layer comprises a resin having butyl acrylate units and methyl methacrylate units.
5. An elastic sheet with an adhesive layer according to any one of claims 1 to 4 for use in a flexible display.
6. A flexible display in which the elastic sheet with an adhesive layer according to any one of claims 1 to 4 is attached to the front surface side of the flexible display.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021029253 | 2021-02-25 | ||
| JP2021-029253 | 2021-02-25 | ||
| PCT/JP2022/007470 WO2022181656A1 (en) | 2021-02-25 | 2022-02-24 | Adhesive-layer-equipped elastic sheet, and flexible display device in which same is used |
Publications (1)
| Publication Number | Publication Date |
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| CN117062887A true CN117062887A (en) | 2023-11-14 |
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| CN202280015843.1A Pending CN117062887A (en) | 2021-02-25 | 2022-02-24 | Elastic sheet with adhesive layer and flexible display device using the same |
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| Country | Link |
|---|---|
| JP (1) | JPWO2022181656A1 (en) |
| KR (1) | KR20230151998A (en) |
| CN (1) | CN117062887A (en) |
| TW (1) | TW202235562A (en) |
| WO (1) | WO2022181656A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6275945B2 (en) * | 2012-12-10 | 2018-02-07 | 日東電工株式会社 | Optical film with double-sided pressure-sensitive adhesive, and method for manufacturing an image display device using the same |
| KR101668151B1 (en) * | 2013-06-19 | 2016-10-20 | 주식회사 엘지화학 | Pressure sensitive adhesive composition |
| JP6366969B2 (en) * | 2014-03-19 | 2018-08-01 | リンテック株式会社 | Substrate-less double-sided pressure-sensitive adhesive tape and method for producing the substrate-less double-sided adhesive tape |
| WO2016196576A1 (en) * | 2015-06-03 | 2016-12-08 | 3M Innovative Properties Company | Acrylic block copolymer-based assembly layer for flexible displays |
| JP6725373B2 (en) | 2015-09-16 | 2020-07-15 | 日東電工株式会社 | Adhesive composition, adhesive layer, optical film with adhesive layer, optical member, and image display device |
| US20230144464A1 (en) * | 2020-02-28 | 2023-05-11 | Nitto Denko Corporation | Pressure-sensitive adhesive sheet and use thereof |
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2022
- 2022-02-24 CN CN202280015843.1A patent/CN117062887A/en active Pending
- 2022-02-24 KR KR1020237028053A patent/KR20230151998A/en unknown
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| KR20230151998A (en) | 2023-11-02 |
| JPWO2022181656A1 (en) | 2022-09-01 |
| TW202235562A (en) | 2022-09-16 |
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