KR20220169228A - Adhesive sheet for display and display comprising the same - Google Patents
Adhesive sheet for display and display comprising the same Download PDFInfo
- Publication number
- KR20220169228A KR20220169228A KR1020210079392A KR20210079392A KR20220169228A KR 20220169228 A KR20220169228 A KR 20220169228A KR 1020210079392 A KR1020210079392 A KR 1020210079392A KR 20210079392 A KR20210079392 A KR 20210079392A KR 20220169228 A KR20220169228 A KR 20220169228A
- Authority
- KR
- South Korea
- Prior art keywords
- display
- adhesive sheet
- adhesive
- variable
- adhesive layer
- Prior art date
Links
- 230000001070 adhesive effect Effects 0.000 title claims abstract description 110
- 239000000853 adhesive Substances 0.000 title claims abstract description 109
- 239000000178 monomer Substances 0.000 claims abstract description 33
- 239000000203 mixture Substances 0.000 claims abstract description 24
- 239000011347 resin Substances 0.000 claims abstract description 21
- 229920005989 resin Polymers 0.000 claims abstract description 21
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 16
- 125000004178 (C1-C4) alkyl group Chemical group 0.000 claims abstract description 10
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 10
- 239000001257 hydrogen Substances 0.000 claims abstract description 10
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims abstract description 10
- 125000000041 C6-C10 aryl group Chemical group 0.000 claims abstract description 5
- 239000012790 adhesive layer Substances 0.000 claims description 56
- 238000003860 storage Methods 0.000 claims description 26
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 24
- 239000010410 layer Substances 0.000 claims description 17
- 238000000016 photochemical curing Methods 0.000 claims description 14
- 229920000642 polymer Polymers 0.000 claims description 8
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 6
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 5
- 125000000524 functional group Chemical group 0.000 claims description 5
- 125000000217 alkyl group Chemical group 0.000 claims description 3
- 125000004432 carbon atom Chemical group C* 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 5
- 230000003287 optical effect Effects 0.000 abstract description 4
- -1 acryl Chemical group 0.000 abstract description 3
- 239000010408 film Substances 0.000 description 38
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 31
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 17
- 230000000052 comparative effect Effects 0.000 description 15
- 238000005452 bending Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 13
- 230000008569 process Effects 0.000 description 13
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 10
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 9
- 239000002904 solvent Substances 0.000 description 7
- IGFHQQFPSIBGKE-UHFFFAOYSA-N Nonylphenol Natural products CCCCCCCCCC1=CC=C(O)C=C1 IGFHQQFPSIBGKE-UHFFFAOYSA-N 0.000 description 6
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- SNQQPOLDUKLAAF-UHFFFAOYSA-N nonylphenol Chemical compound CCCCCCCCCC1=CC=CC=C1O SNQQPOLDUKLAAF-UHFFFAOYSA-N 0.000 description 6
- 229920000139 polyethylene terephthalate Polymers 0.000 description 6
- 239000005020 polyethylene terephthalate Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 238000004080 punching Methods 0.000 description 5
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 4
- LLEMOWNGBBNAJR-UHFFFAOYSA-N biphenyl-2-ol Chemical compound OC1=CC=CC=C1C1=CC=CC=C1 LLEMOWNGBBNAJR-UHFFFAOYSA-N 0.000 description 4
- 238000001723 curing Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 229920001721 polyimide Polymers 0.000 description 4
- 229920001296 polysiloxane Polymers 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 238000001029 thermal curing Methods 0.000 description 4
- 238000002834 transmittance Methods 0.000 description 4
- KWVGIHKZDCUPEU-UHFFFAOYSA-N 2,2-dimethoxy-2-phenylacetophenone Chemical compound C=1C=CC=CC=1C(OC)(OC)C(=O)C1=CC=CC=C1 KWVGIHKZDCUPEU-UHFFFAOYSA-N 0.000 description 3
- GOXQRTZXKQZDDN-UHFFFAOYSA-N 2-Ethylhexyl acrylate Chemical compound CCCCC(CC)COC(=O)C=C GOXQRTZXKQZDDN-UHFFFAOYSA-N 0.000 description 3
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 3
- 229920000144 PEDOT:PSS Polymers 0.000 description 3
- 229920001609 Poly(3,4-ethylenedioxythiophene) Polymers 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 3
- 229920001467 poly(styrenesulfonates) Polymers 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- CEXQWAAGPPNOQF-UHFFFAOYSA-N 2-phenoxyethyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCOC1=CC=CC=C1 CEXQWAAGPPNOQF-UHFFFAOYSA-N 0.000 description 2
- WOBHKFSMXKNTIM-UHFFFAOYSA-N Hydroxyethyl methacrylate Chemical compound CC(=C)C(=O)OCCO WOBHKFSMXKNTIM-UHFFFAOYSA-N 0.000 description 2
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- BHHGXPLMPWCGHP-UHFFFAOYSA-N Phenethylamine Chemical compound NCCC1=CC=CC=C1 BHHGXPLMPWCGHP-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
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- 230000007423 decrease Effects 0.000 description 2
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- 238000002347 injection Methods 0.000 description 2
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- 239000012948 isocyanate Substances 0.000 description 2
- 150000002513 isocyanates Chemical class 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 235000010292 orthophenyl phenol Nutrition 0.000 description 2
- 229920002338 polyhydroxyethylmethacrylate Polymers 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- KCZQSKKNAGZQSZ-UHFFFAOYSA-N 1,3,5-tris(6-isocyanatohexyl)-1,3,5-triazin-2,4,6-trione Chemical compound O=C=NCCCCCCN1C(=O)N(CCCCCCN=C=O)C(=O)N(CCCCCCN=C=O)C1=O KCZQSKKNAGZQSZ-UHFFFAOYSA-N 0.000 description 1
- 239000012956 1-hydroxycyclohexylphenyl-ketone Substances 0.000 description 1
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NDWUBGAGUCISDV-UHFFFAOYSA-N 4-hydroxybutyl prop-2-enoate Chemical compound OCCCCOC(=O)C=C NDWUBGAGUCISDV-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 239000002313 adhesive film Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- MQDJYUACMFCOFT-UHFFFAOYSA-N bis[2-(1-hydroxycyclohexyl)phenyl]methanone Chemical compound C=1C=CC=C(C(=O)C=2C(=CC=CC=2)C2(O)CCCCC2)C=1C1(O)CCCCC1 MQDJYUACMFCOFT-UHFFFAOYSA-N 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000012045 crude solution Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- GVZWVCMTOCTDMO-UHFFFAOYSA-N dimethylphosphoryl-(2,4,6-trimethylphenyl)methanone Chemical compound CC1=CC(C)=C(C(=O)P(C)(C)=O)C(C)=C1 GVZWVCMTOCTDMO-UHFFFAOYSA-N 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000005525 hole transport Effects 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical compound OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000767 polyaniline Polymers 0.000 description 1
- 229920000123 polythiophene Polymers 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Images
Classifications
-
- 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
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
-
- 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
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on 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
- C09J4/00—Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
- C09J4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09J159/00 - C09J187/00
-
- 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
-
- 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
- C09J7/25—Plastics; Metallised plastics based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/255—Polyesters
-
- 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
-
- 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
- C09J7/50—Adhesives in the form of films or foils characterised by a primer layer between the carrier and the adhesive
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
-
- H01L27/32—
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- H01L51/52—
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
-
- 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
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/37—Applications of adhesives in processes or use of adhesives in the form of films or foils for repositionable or removable tapes
-
- 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
- C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
- C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
- C09J2301/122—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present only on one side of the carrier, e.g. single-sided adhesive tape
-
- 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
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/40—Additional features of adhesives in the form of films or foils characterized by the presence of essential components
- C09J2301/416—Additional features of adhesives in the form of films or foils characterized by the presence of essential components use of irradiation
-
- 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
- C09J2425/00—Presence of styrenic polymer
- C09J2425/003—Presence of styrenic polymer in the primer coating
-
- 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
-
- 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
- C09J2465/00—Presence of polyphenylene
- C09J2465/003—Presence of polyphenylene in the primer coating
-
- 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
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Optics & Photonics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Adhesive Tapes (AREA)
Abstract
Description
본 발명은 디스플레이용 점착시트 및 이를 포함하는 디스플레이에 관한 것으로서, 보다 상세하게는 UV 조사에 의한 경화 전 점착력이 낮아 디스플레이 장치에 디스플레이용 점착시트를 부착하는 공정에서 재 박리가 용이하고, 레이저 타발 공정을 통한 디스플레이용 점착시트의 국소 부분 제거가 용이하며, UV 조사에 의한 경화 후에는 디스플레이 장치와의 점착력이 우수하고, 디스플레이용 점착시트의 접착 필름의 흐름성이 낮으며, 벤딩 성능이 우수함에 따라 플렉서블 디스플레이에도 적용이 가능할 뿐만 아니라, 베이스 필름과의 밀착력이 우수하고, 광학적 특성도 우수한 디스플레이용 점착시트 및 이를 포함하는 디스플레이에 관한 것이다. The present invention relates to an adhesive sheet for a display and a display including the same, and more particularly, the adhesive strength before curing by UV irradiation is low, so that the adhesive sheet for a display can be easily re-peeled in a process of attaching the adhesive sheet for a display to a display device, and the laser punching process It is easy to remove the local portion of the adhesive sheet for display through UV irradiation, and after curing by UV irradiation, the adhesive strength with the display device is excellent, the flowability of the adhesive film of the adhesive sheet for display is low, and the bending performance is excellent. The present invention relates to a pressure-sensitive adhesive sheet for a display having excellent adhesion to a base film and excellent optical properties, as well as being applicable to a flexible display, and a display including the same.
최근 정보 통신 기술의 비약적인 발전과 시장의 팽창에 따라, 유기발광소자는 빠른 응답속도와 경박단소, 저소비전력, 자발광, 유연성 등의 장점을 가지고 있어 최근 차세대 디스플레이소자, 플렉서블 디스플레이뿐만 아니라 조명 등에 그 수요가 증가되고 있다.Recently, with the rapid development of information and communication technology and the expansion of the market, organic light emitting diodes have advantages such as fast response speed, light, thin and small size, low power consumption, self-luminescence, and flexibility. Demand is increasing.
유기발광소자는 유리기판 상에 투명전극, 정공주입층, 정공수송층, 유기발광층, 전자수송층, 전자주입층, 금속전극의 순서로 증착되어 형성되며 양쪽전극에서 공급된 전자와 정공이 유기발광층에서 재결합하며 방출되는 에너지를 이용해 발광하는 원리이다.The organic light emitting device is formed by depositing a transparent electrode, a hole injection layer, a hole transport layer, an organic light emitting layer, an electron transport layer, an electron injection layer, and a metal electrode in the order on a glass substrate, and electrons and holes supplied from both electrodes recombine in the organic light emitting layer. It is a principle that emits light using the energy emitted.
디스플레이 장치 하부에는 외력으로부터 디스플레이 장치를 보호하기 위한 점착시트를 포함하는데, 점착시트를 부착하는 공정에 있어서 불량이 발생하여 점착시트를 제거하는 상황이 발생할 수 있지만, 점착시트의 높은 점착력으로 인해 점착시트의 제거가 불가능한 경우가 발생할 수 있으며, 이로 인해 디스플레이 장치의 재사용이 어려운 문제가 있었다. 또한, 점착시트의 높은 점착력으로 인해 대면적의 디스플레이 장치에 부착한 점착시트를 레이저 타발을 통한 국소 부분 제거 공정에서 디스플레이 장치의 손상을 야기하는 문제가 있었다.An adhesive sheet is included at the bottom of the display device to protect the display device from external force. In the process of attaching the adhesive sheet, defects may occur and the adhesive sheet may be removed. However, due to the high adhesive strength of the adhesive sheet, the adhesive sheet There may be cases in which removal of the display device is impossible, and thus, reuse of the display device is difficult. In addition, due to the high adhesive strength of the adhesive sheet, there is a problem of causing damage to the display device in a process of partially removing the adhesive sheet attached to the large area display device through laser punching.
본 발명은 점착시트의 점착력 가변특성 부여를 통해 UV 조사 등의 열경화 처리 전에는 점착력이 낮아 디스플레이 장치에 점착시트 부착하는 공정에 있어서 재 박리가 용이하고, 레이저 타발 공정을 통한 점착시트의 국소 부분 제거가 용이하며, UV 조사 등의 열경화 처리 후에는 디스플레이 장치와의 점착력이 우수하고, 가변점착층의 흐름성이 낮으며, 벤딩성능이 우수함에 따라 단차가 있는 디스플레이 또는 플렉서블 디스플레이에 적용이 가능하고, 베이스 필름과의 밀착력이 우수하고, 광학적 특성도 우수한 디스플레이용 점착시트를 제공하는 것을 목적으로 한다.According to the present invention, the adhesive strength of the adhesive sheet is low prior to thermal curing such as UV irradiation by imparting variable adhesive properties to the adhesive sheet, so that re-peeling is easy in the process of attaching the adhesive sheet to a display device, and localized portions of the adhesive sheet are removed through a laser punching process. It is easy to apply, and after thermal curing such as UV irradiation, it has excellent adhesiveness with the display device, low flowability of the variable adhesive layer, and excellent bending performance, so it can be applied to a display with a step or a flexible display. , It is an object of the present invention to provide a pressure-sensitive adhesive sheet for a display having excellent adhesion to a base film and excellent optical properties.
본 발명의 목적은 이상에서 언급한 목적으로 제한되지 않으며, 언급되지 않은 본 발명의 다른 목적 및 장점들은 하기의 설명에 의해서 이해될 수 있고, 본 발명의 실시예에 의해 보다 분명하게 이해될 것이다. 또한, 본 발명의 목적 및 장점들은 특허 청구범위에 나타낸 수단 및 그 조합에 의해 실현될 수 있음을 쉽게 알 수 있을 것이다.The object of the present invention is not limited to the above-mentioned object, and other objects and advantages of the present invention not mentioned above can be understood by the following description and will be more clearly understood by the examples of the present invention. It will also be readily apparent that the objects and advantages of the present invention may be realized by means of the instrumentalities and combinations thereof set forth in the claims.
상술한 기술적 과제를 해결하기 위하여, 본 발명의 일 양태에 따른 디스플레이용 점착시트는, 아크릴계 주제 수지, 가교제, 광개시제 및 하기 화학식 1로 표시되는 광경화성 모노머를 포함하는 점착 조성물로 형성되는 가변 점착층을 포함하는 것을 특징으로 한다.In order to solve the above technical problem, the adhesive sheet for display according to one aspect of the present invention is a variable adhesive layer formed of an adhesive composition including an acrylic main resin, a crosslinking agent, a photoinitiator, and a photocurable monomer represented by the following formula (1) It is characterized in that it includes.
[화학식 1][Formula 1]
상기 화학식 1에서, 상기 R1은 수소(H) 또는 C1~C4의 알킬기이고, R2는 수소(H), C1~C4의 알킬기 또는 C6~C10의 아릴기이고, n은 1~8의 정수이다.In Formula 1, R1 is hydrogen (H) or a C1-C4 alkyl group, R2 is hydrogen (H), a C1-C4 alkyl group, or a C6-C10 aryl group, and n is an integer of 1 to 8.
본 발명의 일 양태에 있어서, 상기 가변 점착층은, 광경화 전 25℃에서의 전단 저장탄성률이 1.0×105 Pa 미만이면서 점착력이 50 gf/25mm 이하이고, 광경화 후 25℃에서의 전단 저장탄성률이 1.5×105 Pa 미만이면서 점착력이 500 gf/25mm 이상일 수 있다.In one aspect of the present invention, the variable adhesive layer has a shear storage modulus of less than 1.0×10 5 Pa at 25° C. before photocuring and an adhesive force of 50 gf/25 mm or less, and shear storage at 25° C. after photocuring The elastic modulus may be less than 1.5×10 5 Pa and the adhesive strength may be 500 gf/25 mm or more.
본 발명의 일 양태에 있어서, 상기 가변 점착층에서는, 상기 아크릴계 주제 수지 100 중량부를 기준으로, 상기 가교제는 0.4~1.3 중량부 및 상기 광경화성 모노머는 5~13 중량부로 포함할 수 있다.In one aspect of the present invention, the variable adhesive layer may include 0.4 to 1.3 parts by weight of the crosslinking agent and 5 to 13 parts by weight of the photocurable monomer based on 100 parts by weight of the acrylic main resin.
본 발명의 일 양태에 있어서, 상기 아크릴계 주제수지는, 탄소수 1 내지 14인 알킬기를 가지는 (메트)아크릴계 모노머의 중합체를 포함하고, 관능기로서 카르복실기 또는 히드록실기를 포함할 수 있다.In one aspect of the present invention, the acrylic main resin includes a polymer of a (meth)acrylic monomer having an alkyl group having 1 to 14 carbon atoms, and may include a carboxyl group or a hydroxyl group as a functional group.
본 발명의 일 양태에 있어서, 상기 디스플레이용 점착시트는 상기 가변 점착층 일면에 적층된 베이스 필름을 더 포함할 수 있다.In one aspect of the present invention, the adhesive sheet for display may further include a base film laminated on one surface of the variable adhesive layer.
본 발명의 일 양태에 있어서, 상기 베이스 필름은 적어도 일면에 대전방지층을 포함할 수 있다.In one aspect of the present invention, the base film may include an antistatic layer on at least one surface.
본 발명의 일 양태에 있어서, 상기 가변 점착층 타면에 적층된 라이너 필름을 더 포함할 수 있다.In one aspect of the present invention, a liner film laminated on the other surface of the variable adhesive layer may be further included.
본 발명의 다른 양태에 있어서, 상기 디스플레이용 점착시트를 포함하는 디스플레이를 제공할 수 있다.In another aspect of the present invention, a display including the pressure-sensitive adhesive sheet for display may be provided.
본 발명의 디스플레이용 점착시트는, 점착력 가변특성을 가지므로 UV 조사 등의 열경화 처리 전에는 점착력이 낮아 디스플레이 장치에 점착시트 부착하는 공정에 있어서 재 박리가 용이하고, 레이저 타발 공정을 통한 점착시트의 국소 부분 제거가 용이하며, UV 조사 등의 열경화 처리 후에는 디스플레이 장치와의 점착력이 우수하고, 가변점착층의 흐름성이 낮으며, 벤딩성능이 우수함에 따라 단차가 있는 디스플레이 또는 플렉서블 디스플레이에 적용이 가능하고, 베이스 필름과의 밀착력이 우수하고, 광학적 특성도 우수한 효과를 갖는다.Since the adhesive sheet for display of the present invention has variable adhesive strength, the adhesive strength is low before thermal curing such as UV irradiation, so that it is easy to re-peel in the process of attaching the adhesive sheet to a display device, and the adhesive sheet can be easily removed through the laser punching process. It is easy to remove local parts, has excellent adhesiveness with display devices after thermal curing such as UV irradiation, low flowability of the variable adhesive layer, and excellent bending performance, so it is applied to displays with steps or flexible displays. This is possible, has excellent adhesion with the base film, and has excellent optical properties.
본 명세서의 효과는 이상에서 언급한 효과에 제한되지 않으며, 언급되지 않은 또 다른 효과는 아래의 기재로부터 당업자에게 명확하게 이해될 수 있을 것이다.Effects of the present specification are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below.
상술한 효과와 더불어 본 발명의 구체적인 효과는 이하 발명을 실시하기 위한 구체적인 사항을 설명하면서 함께 기술한다.In addition to the effects described above, specific effects of the present invention will be described together while explaining specific details for carrying out the present invention.
도 1은 본 발명의 바람직한 일 실시예로서, 본 발명의 디스플레이 용 점착시트의 개략적인 단면도를 나타낸 것이다.1 is a schematic cross-sectional view of a pressure-sensitive adhesive sheet for a display of the present invention as a preferred embodiment of the present invention.
전술한 목적, 특징 및 장점은 첨부된 도면을 참조하여 상세하게 후술되며, 이에 따라 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자가 본 발명의 기술적 사상을 용이하게 실시할 수 있을 것이다. 본 발명을 설명함에 있어서 본 발명과 관련된 공지 기술에 대한 구체적인 설명이 본 발명의 요지를 불필요하게 흐릴 수 있다고 판단되는 경우에는 상세한 설명을 생략한다. 이하, 첨부된 도면을 참조하여 본 발명에 따른 바람직한 실시예를 상세히 설명하기로 한다. 도면에서 동일한 참조부호는 동일 또는 유사한 구성요소를 가리키는 것으로 사용된다.The above objects, features and advantages will be described later in detail with reference to the accompanying drawings, and accordingly, those skilled in the art to which the present invention belongs will be able to easily implement the technical spirit of the present invention. In describing the present invention, if it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.
본 명세서에서 구성요소의 "상부 (또는 하부)" 또는 구성요소의 "상 (또는 하)"에 임의의 구성이 배치된다는 것은, 임의의 구성이 상기 구성요소의 상면 (또는 하면)에 접하여 배치되는 것뿐만 아니라, 상기 구성요소와 상기 구성요소 상에 (또는 하에) 배치된 임의의 구성 사이에 다른 구성이 개재될 수 있음을 의미할 수 있다. In the present specification, the arrangement of an arbitrary element on the "upper (or lower)" or "upper (or lower)" of a component means that an arbitrary element is placed in contact with the upper (or lower) surface of the component. In addition, it may mean that other components may be interposed between the component and any component disposed on (or under) the component.
본 명세서에서 사용되는 단수의 표현은 문맥상 명백하게 다르게 뜻하지 않는 한, 복수의 표현을 포함한다. 본 출원에서, "구성된다" 또는 "포함한다" 등의 용어는 명세서 상에 기재된 여러 구성 요소들을 반드시 모두 포함하는 것으로 해석되지 않아야 하며, 그 중 일부 구성 요소들은 포함되지 않을 수도 있고, 또는 추가적인 구성 요소들을 더 포함할 수 있는 것으로 해석되어야 한다.Singular expressions used herein include plural expressions unless the context clearly dictates otherwise. In this application, terms such as "consists of" or "includes" should not be construed as necessarily including all of the various components described in the specification, some of which may not be included, or additional configurations It should be construed as possibly including more elements.
본 발명의 일 양태에 따른 디스플레이용 점착시트의 가변 점착층을 제조하기 위한 점착 조성물은 아크릴계 주제 수지, 가교제, 광개시제 및 광경화성 모노머를 포함하는 것을 특징으로 한다.The adhesive composition for preparing the variable adhesive layer of the adhesive sheet for display according to one aspect of the present invention is characterized in that it includes an acrylic main resin, a crosslinking agent, a photoinitiator, and a photocurable monomer.
바람직하게는 본 발명에서 사용하는 광경화성 모노머는 단일 관능성(monofunctional)의 아크릴레이트 모노머일 수 있고, 보다 바람직하게는 하기 화학식 1로 표시되는, 단일관능성 광경화성 모노머일 수 있다. Preferably, the photocurable monomer used in the present invention may be a monofunctional acrylate monomer, and more preferably a monofunctional photocurable monomer represented by Formula 1 below.
[화학식 1][Formula 1]
상기 화학식 1에서, 상기 R1은 수소(H) 또는 C1~C4의 알킬기이고, R2는 수소(H), C1~C4의 알킬기 또는 C6~C10의 아릴기이고, n은 1~8의 정수이다.In Formula 1, R1 is hydrogen (H) or a C1-C4 alkyl group, R2 is hydrogen (H), a C1-C4 alkyl group, or a C6-C10 aryl group, and n is an integer of 1 to 8.
상기 화학식 1로 표시되는 광경화성 모노머의 예시 화합물은, OPPEA (o-phenylphenol EO Acrylate), PHEA (Phenol (EO) Acrylate), PHEA-2 (Phenol (EO)2 Acrylate), PHEA-4 (Phenol (EO)4 Acrylate), NP(EO)2A (Nonyl Phenol (EO)2 Acrylate), NP(EO)4A (Nonyl Phenol (EO)4 Acrylate), NP(EO)8A (Nonyl Phenol (EO)8 Acrylate) 및 PHEMA (Phenoxyethyl Methacrylate)으로 구성된 군에서 선택되는 1종일 수 있으나, 이에 제한되는 것은 아니다. Exemplary compounds of the photocurable monomer represented by Formula 1 are OPPEA (o-phenylphenol EO Acrylate), PHEA (Phenol (EO) Acrylate), PHEA-2 (Phenol (EO) 2 Acrylate), PHEA-4 (Phenol ( EO) 4 Acrylate), NP(EO) 2 A (Nonyl Phenol (EO) 2 Acrylate), NP(EO) 4 A (Nonyl Phenol (EO) 4 Acrylate), NP(EO) 8 A (Nonyl Phenol (EO) 8 Acrylate) and PHEMA (Phenoxyethyl Methacrylate), but is not limited thereto.
본 발명의 디스플레이용 점착시트의 점착층은 광경화 전·후로 점착력 및 전단 저장탄성률이 달라지는 가변성을 갖는 것을 특징으로 하는데, 이는 점착 조성물에 포함되는 광경화성 모노머가 UV 조사 전에는 반응되지 않은 모노머 상태로 존재하여 상대적으로 낮은 전단 저장탄성률 및 점착력을 갖지만, UV 조사 후에는 광중합되어 폴리머 상태로 존재함에 따라 전단 저장탄성률 및 점착력이 모두 상승되는 특성으로 인해 달성될 수 있다.The adhesive layer of the adhesive sheet for display of the present invention is characterized in that it has variability in which adhesive strength and shear storage modulus change before and after photocuring, which means that the photocurable monomers included in the adhesive composition are in an unreacted monomer state before UV irradiation. Although it has relatively low shear storage modulus and adhesive strength, it can be achieved due to the characteristics that both the shear storage modulus and adhesive strength increase as it is photopolymerized and exists in a polymer state after UV irradiation.
본 발명자들은 점착층에 가변성을 부여하기 위하여, 상기 화학식 1로 표시되는 광경화성 모노머를 점착 조성물에 첨가하여 본 발명을 안출하였다. 상기 화학식 1의 광경화성 모노머는 UV 조사에 의해 아크릴계 주제 수지와 상호침투 네트워크(interpenetrating network, IPN) 구조를 형성할 수 있는 특성을 가진다.The present inventors devised the present invention by adding a photocurable monomer represented by Chemical Formula 1 to an adhesive composition in order to impart variability to the adhesive layer. The photocurable monomer of Chemical Formula 1 has a property of forming an interpenetrating network (IPN) structure with an acrylic main resin by UV irradiation.
따라서, 레이저 타발 공정을 통한 디스플레이용 점착시트의 국소 부분 제거 후에 UV 조사로 경화시키면, 디스플레이 장치와의 점착력 및 전단 저장탄성률이 충분히 상승되므로, 디스플레이 패키징 공정에서 우수한 공정성(밀착성, 들뜸 저하, 접착력)을 가질 뿐 아니라, 벤딩성능도 우수하여 플렉서블 디스플레이에 적합하게 사용될 수 있다는 이점을 가진다.Therefore, when the adhesive sheet for display for display is partially removed through the laser punching process and then cured with UV irradiation, the adhesive strength with the display device and the shear storage modulus are sufficiently increased. In addition, it has an advantage that it can be used suitably for a flexible display because it has excellent bending performance.
본 발명의 가변 점착층에서는 광경화에 의하여 점착력 및 전단 저장탄성률 상승하는 것이 필요하다. 바람직하게는, 본 발명의 가변 점착층은, 광경화 전 25℃에서의 전단 저장탄성률이 1.0×105 Pa 미만이면서 점착력이 50 gf/25mm 이하이고, 광경화 후 25℃에서의 전단 저장탄성률이 1.5×105 Pa 미만이면서 점착력이 500 gf/25mm 이상이다. 보다 바람직하게는, 본 발명의 가변 점착층은, 광경화 전 25℃에서의 전단 저장탄성률이 3.0×104 Pa 초과이고 1.0×105 Pa 미만이면서 점착력이 10gf/25mm 이상이고 50 gf/25mm 이하이며, 광경화 후 25℃에서의 전단 저장탄성률이 1.0×105 Pa 초과이고 1.5×105 Pa 미만이면서 점착력이 500 gf/25mm 이상이고 2,000 gf/25mm 이하이다.In the variable adhesive layer of the present invention, it is necessary to increase the adhesive strength and shear storage modulus by photocuring. Preferably, the variable adhesive layer of the present invention has a shear storage modulus of less than 1.0×10 5 Pa at 25° C. before photocuring, an adhesive force of 50 gf/25 mm or less, and a shear storage modulus at 25° C. after photocuring. It is less than 1.5×10 5 Pa and has an adhesive force of 500 gf/25 mm or more. More preferably, the variable adhesive layer of the present invention has a shear storage modulus of greater than 3.0×10 4 Pa and less than 1.0×10 5 Pa and an adhesive strength of 10 gf/25 mm or more and 50 gf/25 mm or less at 25° C. before photocuring. And, after photocuring, the shear storage modulus at 25 ° C is greater than 1.0 × 10 5 Pa and less than 1.5 × 10 5 Pa, and the adhesive strength is 500 gf / 25 mm or more and 2,000 gf / 25 mm or less.
본 발명의 점착층에 있어서, 광경화 전 25℃에서의 전단 저장탄성률이 1.0×105 Pa 이상인 경우, 점착층의 높은 탄성으로 인해 피착재 표면에 부착 시 젖음성이 저하되어 광경화 후에 목표하는 점착력 이하로 떨어지는 문제점이 있을 수 있고, 점착력이 50 gf/25mm를 초과하면 디스플레이장치와 점착층 간의 점착력이 높아 국소부위 절단 후 박리하여 제거 시 박리가 되지 않는 문제점이 있을 수 있다. 또한, 광경화 후 25℃에서의 전단 저장탄성률이 1.5×105 Pa 이상인 경우, 디스플레이 장치와 부착상태로 제품의 형상을 변경하기 위하여 구부리거나 접는 공정에서 점착층의 높은 탄성으로 인해 피착재가 갈라지거나 찢어지는 문제점이 있을 수 있고, 점착력이 500 gf/25mm 미만인 경우, 구부리거나 접는 것과 같은 공정에서 타발이나 컷팅된 절단면이 점착력이 약하여 들뜨거나 기포가 발생하는 문제점이 있을 수 있다.In the adhesive layer of the present invention, when the shear storage modulus at 25° C. before photocuring is 1.0×10 5 Pa or more, wettability decreases when attached to the surface of an adherend due to the high elasticity of the adhesive layer, resulting in target adhesive force after photocuring. There may be a problem of falling below, and if the adhesive strength exceeds 50 gf / 25mm, the adhesive strength between the display device and the adhesive layer is high, so there may be a problem in that the peeling is not performed during removal after cutting the local area. In addition, when the shear storage modulus at 25° C. after photocuring is 1.5×10 5 Pa or more, the adherend is cracked or cracked due to the high elasticity of the adhesive layer in the process of bending or folding to change the shape of the product while attached to the display device. There may be a problem of tearing, and if the adhesive strength is less than 500 gf / 25 mm, there may be a problem that the punched or cut cut surface has weak adhesive strength in a process such as bending or folding, so that it is lifted or bubbles are generated.
본 발명의 디스플레이용 점착시트의 가변 점착층을 형성하기 위한 점착 조성물은 아크릴계 주제 수지, 가교제, 광개시제 및 상기 화학식 1로 표시되는 광경화성 모노머를 포함할 수 있고, 용매를 더 포함할 수 있으며, 이하에서는 상기 성분에 대해 설명한다.The adhesive composition for forming the variable adhesive layer of the adhesive sheet for display of the present invention may include an acrylic main resin, a crosslinking agent, a photoinitiator, and a photocurable monomer represented by Formula 1, and may further include a solvent. In, the components are described.
<아크릴계 주제수지><Acrylic base resin>
본 발명의 아크릴계 주제수지는 디스플레이용 점착 조성물이 점착력을 가질 수 있도록 하기 위한 물질로서, 탄소수 1 내지 14인 알킬기를 가지는 (메트)아크릴계 모노머의 중합체일 수 있고, 구체적으로는 에틸헥실아크릴레이트, 부틸아크릴레이트, 에틸아크릴레이트, 메틸아크릴레이트, 아크릴산, 히드록시에틸아크릴레이트, 및 히드록시부틸아크릴레이트로 구성된 군에서 선택되는 1종 이상의 중합체일 수 있으며, 바람직하게는 카르복실기 또는 히드록실기가 결합된 모노머를 포함하는 단량체의 중합체일 수 있다. 상기와 같이 아크릴계 모노머에 카르복실기 또는 히드록실기가 포함됨에 따라, 이의 중합체인 아크릴계 주제수지는 관능기로서 카르복실기 또는 히드록실기를 포함할 수 있다.The acrylic main resin of the present invention is a material for allowing the pressure-sensitive adhesive composition for display to have adhesive strength, and may be a polymer of (meth)acrylic monomers having an alkyl group having 1 to 14 carbon atoms, specifically, ethylhexyl acrylate, butyl It may be at least one polymer selected from the group consisting of acrylate, ethyl acrylate, methyl acrylate, acrylic acid, hydroxyethyl acrylate, and hydroxybutyl acrylate, preferably a carboxyl group or a hydroxyl group bonded thereto. It may be a polymer of monomers including monomers. As described above, as the acrylic monomer includes a carboxyl group or a hydroxyl group, the acrylic main resin, which is a polymer thereof, may include a carboxyl group or a hydroxyl group as a functional group.
<가교제><Crosslinking agent>
본 발명의 디스플레이용 점착시트의 가변 점착층을 형성하기 위한 점착 조성물은, 아크릴계 주제 수지 100 중량부를 기준으로, 상기 가교제는 바람직하게는 0.4~1.3 중량부, 보다 바람직하게는 0.6~1.3 중량부로 포함할 수 있다. 만일 가교제가 0.4 중량부 미만으로 포함되면 가변 점착층이 목적하는 수준으로 경화되지 않을 수 있고, 가교밀도가 저하됨에 따라 가변 점착층의 흐름성이 높아지며, 합착 시 레진 플로우(resin flow) 현상이 발생할 수 있음에 따라 점착성능이 저하될 수 있고, 1.3 중량부를 초과하면 가변 점착층이 과경화되어, 겔분율이 포화됨에 따라 벤딩성능이 저하되는 문제가 발생할 수 있다.The adhesive composition for forming the variable adhesive layer of the pressure-sensitive adhesive sheet for display of the present invention includes preferably 0.4 to 1.3 parts by weight, more preferably 0.6 to 1.3 parts by weight of the crosslinking agent based on 100 parts by weight of the acrylic main resin. can do. If the crosslinking agent is included in an amount of less than 0.4 parts by weight, the variable adhesive layer may not be cured to a desired level, and as the crosslinking density decreases, the flowability of the variable adhesive layer increases and a resin flow phenomenon occurs during bonding. Depending on the amount, the adhesive performance may be deteriorated, and when the amount exceeds 1.3 parts by weight, the variable adhesive layer is overcured, and as the gel fraction is saturated, the bending performance may be deteriorated.
본 발명의 가교제는 당업계에서 일반적으로 사용하는 다양한 성분들의 가교역할을 할 수 있는 가교제를 사용할 수 있고, 바람직하게는 이소시아네이트계 가교제를 사용할 수 있고, 보다 바람직하게는 이소시아누레이트(isocyanurate)를 함유하는 이소시아네이트계 가교제를 사용할 수 있으나, 이에 한정되는 것은 아니다.The crosslinking agent of the present invention may use a crosslinking agent that can perform a crosslinking role of various components commonly used in the art, preferably an isocyanate-based crosslinking agent, and more preferably isocyanurate. An isocyanate-based crosslinking agent containing may be used, but is not limited thereto.
<광경화성 모노머><Photocurable monomer>
본 발명의 디스플레이용 점착시트의 가변 점착층을 형성하기 위한 점착 조성물은, 아크릴계 주제 수지 100 중량부를 기준으로, 상기 화학식 1로 표시되는 광경화성 모노머는 바람직하게는 5~13 중량부, 보다 바람직하게는 7~13 중량부로 포함할 수 있다. 만일 광경화성 모노머가 5 중량부 미만으로 포함되면 가변 점착층이 경화 후 전단 저장탄성률 및 점착력이 목적하는 수준으로 달성되지 않을 수 있고, 13 중량부를 초과하면 가변 점착층이 과경화되어, 전단 저장탄성률이 너무 상승되어 벤딩성능이 저하되는 문제가 발생할 수 있다. In the adhesive composition for forming the variable adhesive layer of the adhesive sheet for display of the present invention, based on 100 parts by weight of the acrylic main resin, the photocurable monomer represented by Formula 1 is preferably 5 to 13 parts by weight, more preferably 5 to 13 parts by weight May include 7 to 13 parts by weight. If the photocurable monomer is included in less than 5 parts by weight, the variable adhesive layer may not achieve desired levels of shear storage modulus and adhesive strength after curing, and if it exceeds 13 parts by weight, the variable adhesive layer is overcured, resulting in shear storage modulus This may cause a problem that the bending performance is lowered due to excessive increase.
본 발명에서 사용하는 광경화성 모노머는 단일 관능성(monofunctional)의 아크릴레이트 모노머일 수 있고, 바람직하게는 본 발명의 광경화성 모노머는 하기 화학식 1로 표시되는 것을 사용할 수 있다. 하기 화학식 1로 표시되는 광경화성 모노머의 예시 화합물은, OPPEA (o-phenylphenol EO Acrylate), PHEA (Phenol (EO) Acrylate), PHEA-2 (Phenol (EO)2 Acrylate), PHEA-4 (Phenol (EO)4 Acrylate), NP(EO)2A (Nonyl Phenol (EO)2 Acrylate), NP(EO)4A (Nonyl Phenol (EO)4 Acrylate), NP(EO)8A (Nonyl Phenol (EO)8 Acrylate) 및 PHEMA (Phenoxyethyl Methacrylate)으로 구성된 군에서 선택되는 1종일 수 있으나, 이에 제한되는 것은 아니다. The photocurable monomer used in the present invention may be a monofunctional acrylate monomer, and preferably, the photocurable monomer of the present invention represented by Formula 1 may be used. Exemplary compounds of the photocurable monomer represented by Formula 1 below are OPPEA (o-phenylphenol EO Acrylate), PHEA (Phenol (EO) Acrylate), PHEA-2 (Phenol (EO) 2 Acrylate), PHEA-4 (Phenol ( EO) 4 Acrylate), NP(EO) 2 A (Nonyl Phenol (EO) 2 Acrylate), NP(EO) 4 A (Nonyl Phenol (EO) 4 Acrylate), NP(EO) 8 A (Nonyl Phenol (EO) 8 Acrylate) and PHEMA (Phenoxyethyl Methacrylate), but is not limited thereto.
[화학식 1] [Formula 1]
상기 화학식 1에서, 상기 R1은 수소(H) 또는 C1~C4의 알킬기이고, R2는 수소(H), C1~C4의 알킬기 또는 C6~C10의 아릴기이고, n은 1~8인 정수이다.In Formula 1, R1 is hydrogen (H) or a C1-C4 alkyl group, R2 is hydrogen (H), a C1-C4 alkyl group or a C6-C10 aryl group, and n is an integer of 1 to 8.
<광개시제><Photoinitiator>
본 발명의 디스플레이용 점착시트의 가변 점착층을 형성하기 위한 점착 조성물은, 아크릴계 주제 수지 100 중량부를 기준으로, 광개시제를 바람직하게는 0.1~1 중량부, 보다 바람직하게는 0.4~1 중량부로 포함할 수 있다. 만일 광 개시제가 0.1 중량부 미만으로 포함하면 UV 조사에 의한 광경화가 불충분하여 점착시트와 디스플레이 장치 간의 점착력이 저하되어, 취급 공정시 점착시트가 디스플레이 장치로부터 들뜨거나 탈락되는 문제가 있을 수 있고, 1 중량부를 초과하여 포함하면 형광등 및/또는 LED 조명등에서 발생하는 약한 광량의 UV로 인해 광 개시제가 분해되어 낮은 분자량의 중합체가 형성되고, 이로 인해 UV 조사시 목적하는 수준의 점착력에 도달하지 못하는 문제가 있을 수 있다. The pressure-sensitive adhesive composition for forming the variable adhesive layer of the pressure-sensitive adhesive sheet for display of the present invention may include a photoinitiator in an amount of preferably 0.1 to 1 part by weight, more preferably 0.4 to 1 part by weight, based on 100 parts by weight of the acrylic main resin. can If the photoinitiator is included in an amount of less than 0.1 part by weight, photocuring by UV irradiation is insufficient and the adhesive strength between the adhesive sheet and the display device is lowered, and there may be a problem in that the adhesive sheet is lifted or detached from the display device during the handling process. If it is included in excess of parts by weight, the photoinitiator is decomposed due to the weak amount of UV light generated from fluorescent lamps and/or LED lights to form a low molecular weight polymer, which causes the problem that the desired level of adhesiveness cannot be reached during UV irradiation. There may be.
본 발명의 광개시제는 당업계에서 일반적으로 사용하는 UV 광경화가 가능한 광개시제를 사용할 수 있고, 바람직하게는 1-하이드록시사이클로헥실페닐케톤, 1-하이드록시-2-메틸-1-페닐-프로판-1-온, 디메틸2,4,6-트리메틸벤조일 포스핀옥사이드 및 2,2-디메톡시-2-페닐아세토페논 중에서 선택된 1종 이상을 포함할 수 있고, 더욱 바람직하게는 2,2-디메톡시-2-페닐아세토페논을 포함할 수 있다.The photoinitiator of the present invention may use a UV photocurable photoinitiator commonly used in the art, preferably 1-hydroxycyclohexylphenylketone, 1-hydroxy-2-methyl-1-phenyl-propane-1 -one, dimethyl 2,4,6-trimethylbenzoyl phosphine oxide and 2,2-dimethoxy-2-phenylacetophenone may include at least one selected from, more preferably 2,2-dimethoxy- 2-phenylacetophenone.
<용매> <Solvent>
본 발명의 디스플레이용 점착시트의 가변 점착층을 형성하기 위한 점착 조성물은, 아크릴계 주제 수지 100 중량부를 기준으로, 용매 10~30 중량부, 바람직하게는 15~25 중량부, 더욱 바람직하게는 18~22 중량부로 포함할 수 있고, 만일 용매가 10 중량부 미만으로 포함하면 점도가 높아 조액 제조시 불균일한 혼합으로 인해 목적하는 수준으로의 점착 후의 원하는 물성 구현에 문제가 있을 수 있고, 30 중량부를 초과하면 점도가 낮아 베이스 필름에 점착 조성물을 도포시 점착 조성물이 흘러 목적하는 수준으로의 점착시트의 두께로 제작하는데 어려울 수 있고, 코팅 후 건조시 과량의 용매가 휘발하면서 가변 점착층의 표면이 오렌지 필과 같은 표면불량을 초래하는 문제가 있을 수 있다.The adhesive composition for forming the variable adhesive layer of the adhesive sheet for display of the present invention contains 10 to 30 parts by weight of solvent, preferably 15 to 25 parts by weight, more preferably 18 to 25 parts by weight, based on 100 parts by weight of the acrylic main resin. It may be included in 22 parts by weight, and if the solvent is included in less than 10 parts by weight, the viscosity is high and there may be a problem in realizing the desired physical properties after adhesion to the desired level due to non-uniform mixing during preparation of the crude solution, and in excess of 30 parts by weight When the adhesive composition is applied to the base film, the adhesive composition flows when the adhesive composition is applied to the base film because the viscosity of the lower surface is low, and it may be difficult to manufacture the adhesive sheet to a desired thickness. There may be problems that cause surface defects such as
본 발명의 점착 조성물 제조시 사용되는 용매는 당업계에서 일반적으로 사용하는 다양한 용매를 사용할 수 있고, 바람직하게는 메틸에틸케톤, 톨루엔, 에틸아세테이트 및 테트라하이드로퓨란(THF) 중에서 선택된 1종 이상을 포함할 수 있고, 더욱 바람직하게는 메틸에틸케톤을 포함할 수 있다.The solvent used in preparing the pressure-sensitive adhesive composition of the present invention may include various solvents commonly used in the art, and preferably includes at least one selected from methyl ethyl ketone, toluene, ethyl acetate, and tetrahydrofuran (THF). and more preferably methyl ethyl ketone.
한편, 도 1에 도시된 것과 같이, 본 발명의 디스플레이용 점착시트는 가변 점착층(20)을 포함할 수 있다. 또한, 가변 점착층(20) 일면에 적층된 베이스 필름(10)을 더 포함할 수 있고, 가변 점착층(20) 타면에 적층된 라이너 필름(30)을 더 포함할 수 있다. Meanwhile, as shown in FIG. 1 , the adhesive sheet for a display according to the present invention may include a variable
본 발명의 가변 점착층(20)은 UV 조사에 의해 일정한 점착력을 발휘하여 베이스 필름(10)이 디스플레이용 장치 하부에 부착될 수 있도록 하기 위한 구성으로서, 앞서 언급한 디스플레이용 점착 조성물로 형성될 수 있다.The variable
본 발명의 베이스 필름(10)은 디스플레이용 장치에 직접적으로 부착되어 디스플레이용 장치의 하부를 보호하는 기능을 담당한다. 베이스 필름은 당업계에서 통상적으로 점착시트로 사용할 수 있는 소재라면 제한없이 포함할 수 있으며, 바람직하게는 PET(polyethylene terephthalate) 필름을 포함할 수 있다. The
또한, 베이스 필름(10)은 정전기 발생을 방지하기 위해 적어도 일면에 대전방지층(11)을 포함할 수 있고, 바람직하게는 베이스 필름(10)의 외면에만 대전방지층(11)을 포함할 수 있다.In addition, the
구체적으로, 베이스 필름(10)은 가변 점착층(20)이 적층되지 않은 반대편 면에 대전방지층(11)을 포함할 수 있으며, 대전방지층(11)은 ITO(Indium Tin Oxide), CNT(Carbon Nano tube), 폴리아닐린(poly aniline), 폴리티오팬(Polythiopene) 중 1종 이상을 포함하는 도전성 물질에 바인더(binder)를 첨가한 물질을 포함할 수 있고, 바람직하게는 PEDOT/PSS(폴리(3,4-에틸렌디옥시티오펜 폴리스티렌 술포네이트)를 포함할 수 있다.Specifically, the
본 발명의 라이너 필름(30)은 가변 점착층(20) 및 베이스 필름(10)을 보호하는 기능을 담당한다. 디스플레이용 점착시트는 디스플레이 장치 제조공정에 있어서, 디스플레이 장치의 하부에 부착되어 사용되는데, 디스플레이용 점착시트를 디스플레이 장치의 하부에 부착할 때, 라이너 필름(30)을 박리하고, 가변 점착층(20) 일면을 디스플레이 장치에 부착하여 사용된다.The
라이너 필름(30)은 당업계에서 통상적으로 라이너 필름에 사용하는 소재라면 제한 없이 포함할 수 있으며, 바람직하게는 PET(polyethylene terephthalate) 필름을 포함할 수 있다. The
라이너 필름(30)은 가변 점착층(20)을 보호하는 역할을 하기 위해 적어도 일면에 실리콘층(31)을 포함할 수 있고, 바람직하게는 가변 점착층(20)과 맞닿는 면에만 실리콘층(31)을 포함할 수 있다.The
이하, 본 발명의 바람직한 실시예를 통해 본 발명의 구성 및 작용을 더욱 상세히 설명하기로 한다. 다만, 이는 본 발명의 바람직한 예시로 제시된 것이며 어떠한 의미로도 이에 의해 본 발명이 제한되는 것으로 해석될 수는 없다.Hereinafter, the configuration and operation of the present invention will be described in more detail through preferred embodiments of the present invention. However, this is presented as a preferred example of the present invention and cannot be construed as limiting the present invention by this in any sense.
여기에 기재되지 않은 내용은 이 기술 분야의 통상의 기술자라면 충분히 기술적으로 유추할 수 있는 것이므로 그 설명을 생략하기로 한다.Since contents not described herein can be sufficiently technically inferred by a person skilled in the art, the description thereof will be omitted.
<실시예 1><Example 1>
(1) 점착 조성물의 제조(1) Preparation of adhesive composition
주 모노머로서 2-에틸헥실아크릴레이트(2-ethylhexyl acrylate; 2-EHA) 및 에틸아크릴레이트(Ethyl acrylate; EA)를, 관능기 모노머로서 하이드록시에틸아크릴레이트(Hydroxy ethyl acrylate; HEA)를 공중합시켜, 관능기로서 하이드록실기를 갖는 아크릴계 주제수지를 준비하였다. 상기 아크릴계 주제수지 100 중량부를 기준으로, 용매로서 메틸에틸케톤 20 중량부를 먼저 혼합하고, 광경화성 모노머로서 OPPEA(M1142, 미원스페셜티케미칼 社)를 10 중량부, 가교제로서 HDI 이소시아누레이트(Coronate HX, TOSHO CORPORATION 社)를 1.0 중량부 및 광개시제로서 2,2-디메톡시-2-페닐아세토페논(Omnirad 651, IGM 社)를 0.4 중량부를 첨가하여, 25℃의 온도에서 30분동안 혼합 및 교반하여 점착 조성물을 제조하였다.By copolymerizing 2-ethylhexyl acrylate (2-EHA) and ethyl acrylate (EA) as the main monomers and hydroxyethyl acrylate (HEA) as the functional group monomer, An acrylic main resin having a hydroxyl group as a functional group was prepared. Based on 100 parts by weight of the acrylic main resin, 20 parts by weight of methyl ethyl ketone as a solvent was first mixed, 10 parts by weight of OPPEA (M1142, Miwon Specialty Chemical Co., Ltd.) as a photocurable monomer, and HDI isocyanurate (Coronate HX) as a crosslinking agent , TOSHO CORPORATION) by adding 1.0 parts by weight and 0.4 parts by weight of 2,2-dimethoxy-2-phenylacetophenone (Omnirad 651, IGM) as a photoinitiator, mixing and stirring for 30 minutes at a temperature of 25 ° C. An adhesive composition was prepared.
(2) 점착시트의 제조(2) Manufacture of adhesive sheet
두께 75㎛의 PET 기재의 하부면에 PEDOT/PSS(폴리(3,4-에틸렌디옥시티오펜) 폴리스티렌 술포네이트)를 하부면에 박막 도포하여 대전방지 처리한 기재의 상부면에, 상기 점착 조성물을 도포하여 가점착층을 형성하고, 두께 75㎛의 PET 기재의 상부면 및 하부면에 PEDOT/PSS(폴리(3,4-에틸렌디옥시티오펜) 폴리스티렌 술포네이트)를 박막 도포하여 대전방지 처리하고, 하부면에 실리콘 이형제를 박막 도포하여 실리콘 이형처리한 이형 필름의 하부면과 가점착층이 맞닿도록 배치시킨 후 상온에서 롤 라미네이터를 이용하여 합지한 후 50℃에서 48시간 동안 경화 시켜서, 두께 15㎛의 점착층이 형성된 베이스 필름 및 상기 베이스 필름 상부면에 적층된 이형 필름을 제조함으로써 디스플레이용 점착시트를 제조하였다.PEDOT/PSS (poly(3,4-ethylenedioxythiophene) polystyrene sulfonate) is applied as a thin film to the lower surface of a PET substrate having a thickness of 75 μm, and the adhesive composition is applied to the upper surface of the substrate treated with antistatic treatment. coating to form a temporary adhesive layer, and PEDOT/PSS (poly(3,4-ethylenedioxythiophene) polystyrene sulfonate) was applied as a thin film to the upper and lower surfaces of the PET substrate having a thickness of 75 μm to treat antistatic treatment, A thin film of silicone release agent is applied to the lower surface, and the lower surface of the release film subjected to silicone release treatment is placed so that the temporary adhesive layer is in contact with each other. An adhesive sheet for a display was prepared by preparing a base film having an adhesive layer of and a release film laminated on an upper surface of the base film.
<실시예 2~6 및 비교예 1~5><Examples 2 to 6 and Comparative Examples 1 to 5>
실시예 1과 동일하게 실시하여 제조하되, 실시예 2~6 및 비교예 1~5는 점착 조성물의 각 성분의 함량을 하기 표 1처럼 다르게 한 점에서 차이점이 있다.It was prepared in the same manner as in Example 1, but Examples 2 to 6 and Comparative Examples 1 to 5 differed in that the content of each component of the adhesive composition was changed as shown in Table 1 below.
실험예 1 : 점착층의 점착력(gf/25mm)Experimental Example 1: Adhesion of adhesive layer (gf/25mm)
디스플레이용 점착시트를 폭 25mm × 200mm 크기로 재단 후, 라이너 필름을 제거하고, 점착층의 일면을 폴리이미드 필름(두께 : 25㎛)에 2kg 핸드롤러를 이용하여 3m/min의 속도로 부착하였다. 부착 후, 1시간 동안 상온(25℃)에서 방치하고, 분당 300mm의 속도로 180°로 박리시켜 점착층의 점착력을 측정하였다.After cutting the adhesive sheet for display into a size of 25 mm × 200 mm in width, the liner film was removed, and one side of the adhesive layer was attached to a polyimide film (thickness: 25 μm) using a 2 kg hand roller at a speed of 3 m/min. After attachment, it was left at room temperature (25° C.) for 1 hour, and peeled at 180° at a speed of 300 mm per minute to measure the adhesive strength of the adhesive layer.
실험예 2: UV 조사한 후의 점착층의 점착력(gf/25mm)Experimental Example 2: Adhesion of adhesive layer after UV irradiation (gf/25mm)
디스플레이용 점착시트를 폭 25mm × 200mm 크기로 재단 후, 라이너 필름을 제거하고, 점착층의 일면을 폴리이미드 필름(두께 : 25㎛)에 2kg 핸드롤러를 이용하여 3m/min의 속도로 부착하였다. 부착 후, 고압 수은 램프를 이용하여 베이스 필름의 수직방향으로 UV를 조사한 후, 분당 300mm의 속도로 180°로 박리시켜 점착층의 점착력을 측정하였다.After cutting the adhesive sheet for display into a size of 25 mm × 200 mm in width, the liner film was removed, and one side of the adhesive layer was attached to a polyimide film (thickness: 25 μm) using a 2 kg hand roller at a speed of 3 m/min. After attachment, UV was irradiated in the vertical direction of the base film using a high-pressure mercury lamp, and peeling was performed at an angle of 180° at a rate of 300 mm per minute to measure the adhesive strength of the adhesive layer.
* UV 조사 조건* UV irradiation conditions
① 파장 : 250 ~ 450nm① Wavelength: 250 ~ 450nm
② 광량 : 300mJ/cm2 ② Light intensity: 300mJ/cm 2
③ 출력 : 80mW③ Output : 80mW
실험예 3: 헤이즈(Haze, %), 투과율(%)Experimental Example 3: Haze (%), transmittance (%)
Hazemeter (NDH7000)를 이용하여 라이너 필름을 박리한 디스플레이용 점착시트의 헤이즈 및 투과율을 각각 측정하였다.Haze and transmittance of the pressure-sensitive adhesive sheet for display from which the liner film was peeled were respectively measured using a hazemeter (NDH7000).
실험예 4: UV 조사한 후의 점착시트의 벤딩 성능 평가Experimental Example 4: Evaluation of bending performance of adhesive sheet after UV irradiation
디스플레이용 점착시트의 라이너 필름을 제거하고, 점착층의 일면을 폴리이미드 필름(두께 : 25㎛)에 부착하고, 고압 수은 램프를 이용하여 베이스 필름의 수직방향으로 UV를 조사한 후, 가로×세로 25mm×150mm로 절단하였다.The liner film of the adhesive sheet for display is removed, one side of the adhesive layer is attached to a polyimide film (thickness: 25㎛), and UV is irradiated in the vertical direction of the base film using a high-pressure mercury lamp, and then the width x length is 25mm. It was cut at ×150 mm.
그 후, 디스플레이용 점착시트를 부착한 폴리이미드 필름의 양 끝단이 맞닿도록 위치시켜 곡률 반경 3R로 설정하여 벤딩(bending)을 10000회 수행한 후, 아무런 이상도 없는 경우 ○, 디스플레이용 점착시트 내 층간 박리 및/또는 피착면과의 박리등 어떠한 이상이라도 발생하는 경우 ×로 하여 벤딩 성능을 평가하였다.After that, both ends of the polyimide film to which the display adhesive sheet is attached are brought into contact with each other, and the curvature radius is set to 3R to perform bending 10,000 times. When any abnormalities such as peeling between layers and/or peeling with the adhered surface occurred, the bending performance was evaluated as ×.
* UV 조사 조건* UV irradiation condition
① 파장 : 250 ~ 450nm① Wavelength: 250 ~ 450nm
② 광량 : 300mJ/cm2 ② Light intensity: 300mJ/cm 2
③ 출력 : 80mW③ Output : 80mW
실험예 5 : 상온 전단 저장탄성률 측정Experimental Example 5: Room temperature shear storage modulus measurement
박리력 100gf의 중박리 라이너(SKC HT&M, RT81N)에 실시예 및 비교예에 따른 조성물을 각각 도포하고, 조성물을 도포한 중박리 라이너 상부에 박리력 30gf의 경박리 라이너(SKC, SG31)을 상온에서 롤 라미네이터를 이용하여 합지한 후 50℃에서 48시간 동안 경화시켜서, 두께 1mm의 UV 조사전의 가변점착층이 형성된 전단 저장 탄성률 측정 샘플을 제조하였고, 이와 동일한 방법으로 제조한 샘플을 고압 수은 램프를 이용하여 중박리 필름의 수직방향으로 UV를 조사하여 UV 조사후의 가변점착층이 형성된 전단 저장 탄성률 측정 샘플을 제조하였다.The compositions according to Examples and Comparative Examples were applied to a heavy release liner (SKC HT&M, RT81N) having a peel force of 100 gf, and a light release liner (SKC, SG31) having a peel force of 30 gf was applied at room temperature on the top of the heavy release liner to which the composition was applied. After laminating using a roll laminator, curing at 50 ° C. for 48 hours to prepare a shear storage modulus measurement sample having a variable adhesive layer having a thickness of 1 mm before UV irradiation. Using UV irradiation in the vertical direction of the release film to prepare a shear storage modulus measurement sample having a variable adhesive layer formed after UV irradiation.
제조한 측정 샘플을 직경 8㎜의 원형으로 펀칭하고, 경박리 라이너를 제거한 후 직경 8㎜ 평행판 (Parallel plate)에 부착하고, 중박리 라이너를 제거하였다.The prepared measurement sample was punched into a circular shape having a diameter of 8 mm, and after removing the light release liner, it was attached to a parallel plate having a diameter of 8 mm, and the heavy release liner was removed.
이 후, 모듈러스 측정 장비로 레오미터(TA instrument, ARES G2)를 사용하여, 축방향력(Axial force) 0.5N, 시작온도(Start Temp.) -40℃, 종결온도(End Temp.) 200℃, 램프 레이트(Ramp rate) 10℃/min, 스트레인(strain) 1% 및 빈도(Frequency) 1 Hz의 조건으로 상온 저장 탄성률(Storage Modulus)을 측정하였다. 이를 총 5회 반복 수행한 후 각 평균치를 계산 하였다. After that, using a rheometer (TA instrument, ARES G2) as a modulus measuring instrument, an axial force of 0.5N, a start temperature of -40℃, and an end temperature of 200℃ , Storage Modulus was measured under conditions of a ramp rate of 10° C./min, a strain of 1%, and a frequency of 1 Hz. After repeating this a total of 5 times, each average value was calculated.
* UV 조사 조건* UV irradiation condition
① 파장 : 250 ~ 450nm① Wavelength: 250 ~ 450nm
② 광량 : 300mJ/cm2 ② Light intensity: 300mJ/cm 2
③ 출력 : 80mW③ Output : 80mW
상기 실시예 1~6 및 비교예 1~5에 대하여 수행한 실험예 1~5의 결과를 하기 표 2에 나타냈다.The results of Experimental Examples 1 to 5 performed with respect to Examples 1 to 6 and Comparative Examples 1 to 5 are shown in Table 2 below.
(gf/25mmAdhesion before UV irradiation
(gf/25mm
(gf/25mmAdhesion after UV irradiation
(gf/25mm
전단
저장 탄성율 (Pa)Before UV irradiation
shear
Storage Modulus (Pa)
전단
저장 탄성율
(Pa)After UV irradiation
shear
storage modulus
(Pa)
벤딩
성능
평가After UV irradiation
bending
Performance
evaluation
(%)transmittance
(%)
(%)haze
(%)
상기 표 2에서 확인할 수 있듯이, 실시예 1 ~ 6에서 제조된 디스플레이용 점착시트는 UV 조사 전에 점착력 및 전단 저장탄성률이 낮아, 디스플레이 장치에 점착시트 부착하는 공정에서 재 박리가 용이함을 확인할 수 있고, UV 조사한 후에는 점착력 및 전단 저장탄성률이 상승하여, 벤딩 성능이 우수하고, 가변 점착층의 베이스 필름과의 밀착력이 우수할 뿐만 아니라, 낮은 헤이즈(Haze) 수치를 유지하면서도, 투과율이 우수하다는 것을 알 수 있다. 반면, 광경화성 모노머를 포함하지 않은 비교예 1은 UV 조사 전, 후 점착력이 유사한 수치를 나타내고, UV 조사 전, 후 모두 약 10만 Pa의 동일한 전단 저장탄성률 값을 가져, 가변 점착층을 제조할 수 없었다.As can be seen from Table 2, the adhesive sheets for displays prepared in Examples 1 to 6 have low adhesive strength and shear storage modulus before UV irradiation, and it can be confirmed that re-peeling is easy in the process of attaching the adhesive sheets to the display device, After UV irradiation, it was found that the adhesive strength and shear storage modulus increased, resulting in excellent bending performance, excellent adhesion with the base film of the variable adhesive layer, and excellent transmittance while maintaining a low haze value. can On the other hand, Comparative Example 1, which did not contain a photocurable monomer, showed similar values in adhesive strength before and after UV irradiation, and had the same shear storage modulus value of about 100,000 Pa both before and after UV irradiation, so that a variable adhesive layer could be prepared. couldn't
이상과 같이 본 발명에 대해서 예시한 도면을 참조로 하여 설명하였으나, 본 명세서에 개시된 실시예와 도면에 의해 본 발명이 한정되는 것은 아니며, 본 발명의 기술사상의 범위 내에서 통상의 기술자에 의해 다양한 변형이 이루어질 수 있음은 자명하다. 아울러 앞서 본 발명의 실시예를 설명하면서 본 발명의 구성에 따른 작용 효과를 명시적으로 기재하여 설명하지 않았을 지라도, 해당 구성에 의해 예측 가능한 효과 또한 인정되어야 함은 당연하다.As described above, the present invention has been described with reference to the drawings illustrated, but the present invention is not limited by the embodiments and drawings disclosed herein, and various modifications are made by those skilled in the art within the scope of the technical idea of the present invention. It is obvious that variations can be made. In addition, although the operation and effect according to the configuration of the present invention have not been explicitly described and described while describing the embodiments of the present invention above, it is natural that the effects predictable by the corresponding configuration should also be recognized.
11 : 대전방지층
10 : 베이스 필름
20 : 가변 점착층
30 : 라이너 필름
31 : 실리콘층 11: antistatic layer
10: base film
20: variable adhesive layer
30: liner film
31: silicon layer
Claims (9)
디스플레이용 점착시트:
[화학식 1]
상기 화학식 1에서, 상기 R1은 수소(H) 또는 C1~C4의 알킬기이고, R2는 수소(H), C1~C4의 알킬기 또는 C6~C10의 아릴기이고, n은 1~8의 정수이다.
A variable adhesive layer formed of an adhesive composition including an acrylic main resin, a crosslinking agent, a photoinitiator, and a photocurable monomer represented by Formula 1 below,
Adhesive sheet for display:
[Formula 1]
In Formula 1, R1 is hydrogen (H) or a C1-C4 alkyl group, R2 is hydrogen (H), a C1-C4 alkyl group, or a C6-C10 aryl group, and n is an integer of 1 to 8.
상기 가변 점착층은, 광경화 전 25℃에서의 전단 저장탄성률이 1.0×105 Pa 미만이면서 점착력이 50 gf/25mm 이하인 것을 특징으로 하는,
디스플레이용 점착시트.
According to claim 1,
The variable adhesive layer has a shear storage modulus of less than 1.0 × 10 5 Pa and an adhesive strength of 50 gf / 25 mm or less at 25 ° C before photocuring,
Adhesive sheet for display.
상기 가변 점착층은, 광경화 후 25℃에서의 전단 저장탄성률이 1.5×105 Pa 미만이면서 점착력이 500 gf/25mm 이상인 것을 특징으로 하는,
디스플레이용 점착시트.
According to claim 1,
The variable adhesive layer has a shear storage modulus of less than 1.5 × 10 5 Pa at 25 ° C after photocuring and an adhesive strength of 500 gf / 25 mm or more,
Adhesive sheet for display.
상기 아크릴계 주제 수지 100 중량부를 기준으로,
상기 가교제는 0.4~1.3 중량부 및 상기 광경화성 모노머는 5~13 중량부로 포함하는 것을 특징으로 하는,
디스플레이용 점착시트.
According to claim 1,
Based on 100 parts by weight of the acrylic main resin,
Characterized in that the crosslinking agent comprises 0.4 to 1.3 parts by weight and the photocurable monomer in 5 to 13 parts by weight,
Adhesive sheet for display.
상기 아크릴계 주제수지는, 탄소수 1 내지 14인 알킬기를 가지는 (메트)아크릴계 모노머의 중합체를 포함하고, 관능기로서 카르복실기 또는 히드록실기를 포함하는 것을 특징으로 하는,
디스플레이용 점착시트.
According to claim 1,
The acrylic main resin includes a polymer of a (meth)acrylic monomer having an alkyl group having 1 to 14 carbon atoms and includes a carboxyl group or a hydroxyl group as a functional group,
Adhesive sheet for display.
상기 디스플레이용 점착시트는 상기 가변 점착층 일면에 적층된 베이스 필름을 더 포함하는 것을 특징으로 하는,
디스플레이용 점착시트.
According to claim 1,
Characterized in that the adhesive sheet for display further comprises a base film laminated on one surface of the variable adhesive layer.
Adhesive sheet for display.
상기 베이스 필름은 적어도 일면에 대전방지층을 포함하는 것을 특징으로 하는,
디스플레이용 점착시트.
According to claim 6,
The base film is characterized in that it comprises an antistatic layer on at least one surface,
Adhesive sheet for display.
상기 디스플레이용 점착시트는 상기 가변 점착층 타면에 적층된 라이너 필름을 더 포함하는 것을 특징으로 하는,
디스플레이용 점착시트.
According to claim 6,
Characterized in that the adhesive sheet for display further comprises a liner film laminated on the other side of the variable adhesive layer.
Adhesive sheet for display.
A display comprising the adhesive sheet for display according to any one of claims 1 to 8.
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| KR20180036968A (en) * | 2015-08-03 | 2018-04-10 | 닛폰고세이가가쿠고교 가부시키가이샤 | A pressure sensitive adhesive layer, a pressure sensitive adhesive layer, a pressure sensitive adhesive layer, a pressure sensitive adhesive layer, an image display device, and a touch panel |
| KR20200012568A (en) * | 2018-07-27 | 2020-02-05 | 쓰리엠 이노베이티브 프로퍼티즈 캄파니 | Adhesive composition, adhesive film, laminate and preparation method thereof |
| KR20200062255A (en) * | 2017-09-29 | 2020-06-03 | 사이덴 가가쿠 가부시키가이샤 | Adhesive sheet |
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| JP6112893B2 (en) * | 2013-02-13 | 2017-04-12 | リンテック株式会社 | Adhesive composition, adhesive and adhesive sheet |
| JP6114648B2 (en) * | 2013-06-28 | 2017-04-12 | リンテック株式会社 | Adhesive composition, adhesive and adhesive sheet |
| JP6142396B1 (en) * | 2016-07-28 | 2017-06-07 | サイデン化学株式会社 | Optical film adhesive sheet |
| JP6502999B2 (en) * | 2017-04-17 | 2019-04-17 | リンテック株式会社 | Adhesive composition, adhesive and adhesive sheet |
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| KR20180036968A (en) * | 2015-08-03 | 2018-04-10 | 닛폰고세이가가쿠고교 가부시키가이샤 | A pressure sensitive adhesive layer, a pressure sensitive adhesive layer, a pressure sensitive adhesive layer, a pressure sensitive adhesive layer, an image display device, and a touch panel |
| KR20200062255A (en) * | 2017-09-29 | 2020-06-03 | 사이덴 가가쿠 가부시키가이샤 | Adhesive sheet |
| KR20200012568A (en) * | 2018-07-27 | 2020-02-05 | 쓰리엠 이노베이티브 프로퍼티즈 캄파니 | Adhesive composition, adhesive film, laminate and preparation method thereof |
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