JP2023001909A - Adhesive sheet for display and display comprising the same - Google Patents
Adhesive sheet for display and display comprising the same Download PDFInfo
- Publication number
- JP2023001909A JP2023001909A JP2022098710A JP2022098710A JP2023001909A JP 2023001909 A JP2023001909 A JP 2023001909A JP 2022098710 A JP2022098710 A JP 2022098710A JP 2022098710 A JP2022098710 A JP 2022098710A JP 2023001909 A JP2023001909 A JP 2023001909A
- Authority
- JP
- Japan
- Prior art keywords
- display
- adhesive
- film
- adhesive sheet
- curing
- 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.)
- Granted
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- 230000001070 adhesive effect Effects 0.000 title claims abstract description 126
- 239000000853 adhesive Substances 0.000 title claims abstract description 125
- 230000003287 optical effect Effects 0.000 claims abstract description 50
- 239000003999 initiator Substances 0.000 claims abstract description 37
- 239000000203 mixture Substances 0.000 claims abstract description 34
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 22
- 239000004925 Acrylic resin Substances 0.000 claims abstract description 20
- 229920000178 Acrylic resin Polymers 0.000 claims abstract description 20
- WGXGKXTZIQFQFO-CMDGGOBGSA-N ethenyl (e)-3-phenylprop-2-enoate Chemical compound C=COC(=O)\C=C\C1=CC=CC=C1 WGXGKXTZIQFQFO-CMDGGOBGSA-N 0.000 claims abstract description 12
- 238000011417 postcuring Methods 0.000 claims description 29
- 238000004519 manufacturing process Methods 0.000 claims description 22
- 230000001678 irradiating effect Effects 0.000 claims description 7
- 239000002313 adhesive film Substances 0.000 claims description 6
- 239000004971 Cross linker Substances 0.000 claims description 5
- 239000010408 film Substances 0.000 description 58
- 230000000694 effects Effects 0.000 description 7
- PSGCQDPCAWOCSH-UHFFFAOYSA-N (4,7,7-trimethyl-3-bicyclo[2.2.1]heptanyl) prop-2-enoate Chemical compound C1CC2(C)C(OC(=O)C=C)CC1C2(C)C PSGCQDPCAWOCSH-UHFFFAOYSA-N 0.000 description 6
- XLPJNCYCZORXHG-UHFFFAOYSA-N 1-morpholin-4-ylprop-2-en-1-one Chemical compound C=CC(=O)N1CCOCC1 XLPJNCYCZORXHG-UHFFFAOYSA-N 0.000 description 6
- GOXQRTZXKQZDDN-UHFFFAOYSA-N 2-Ethylhexyl acrylate Chemical compound CCCCC(CC)COC(=O)C=C GOXQRTZXKQZDDN-UHFFFAOYSA-N 0.000 description 6
- XMLYCEVDHLAQEL-UHFFFAOYSA-N 2-hydroxy-2-methyl-1-phenylpropan-1-one Chemical compound CC(C)(O)C(=O)C1=CC=CC=C1 XMLYCEVDHLAQEL-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 238000007667 floating Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- VFHVQBAGLAREND-UHFFFAOYSA-N diphenylphosphoryl-(2,4,6-trimethylphenyl)methanone Chemical compound CC1=CC(C)=CC(C)=C1C(=O)P(=O)(C=1C=CC=CC=1)C1=CC=CC=C1 VFHVQBAGLAREND-UHFFFAOYSA-N 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 4
- 238000007259 addition reaction Methods 0.000 description 4
- 238000004132 cross linking Methods 0.000 description 4
- PBOSTUDLECTMNL-UHFFFAOYSA-N lauryl acrylate Chemical compound CCCCCCCCCCCCOC(=O)C=C PBOSTUDLECTMNL-UHFFFAOYSA-N 0.000 description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 description 4
- 239000005020 polyethylene terephthalate Substances 0.000 description 4
- 238000007363 ring formation reaction Methods 0.000 description 4
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 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 2
- GJKGAPPUXSSCFI-UHFFFAOYSA-N 2-Hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone Chemical compound CC(C)(O)C(=O)C1=CC=C(OCCO)C=C1 GJKGAPPUXSSCFI-UHFFFAOYSA-N 0.000 description 2
- UHFFVFAKEGKNAQ-UHFFFAOYSA-N 2-benzyl-2-(dimethylamino)-1-(4-morpholin-4-ylphenyl)butan-1-one Chemical compound C=1C=C(N2CCOCC2)C=CC=1C(=O)C(CC)(N(C)C)CC1=CC=CC=C1 UHFFVFAKEGKNAQ-UHFFFAOYSA-N 0.000 description 2
- PCKZAVNWRLEHIP-UHFFFAOYSA-N 2-hydroxy-1-[4-[[4-(2-hydroxy-2-methylpropanoyl)phenyl]methyl]phenyl]-2-methylpropan-1-one Chemical compound C1=CC(C(=O)C(C)(O)C)=CC=C1CC1=CC=C(C(=O)C(C)(C)O)C=C1 PCKZAVNWRLEHIP-UHFFFAOYSA-N 0.000 description 2
- LWRBVKNFOYUCNP-UHFFFAOYSA-N 2-methyl-1-(4-methylsulfanylphenyl)-2-morpholin-4-ylpropan-1-one Chemical compound C1=CC(SC)=CC=C1C(=O)C(C)(C)N1CCOCC1 LWRBVKNFOYUCNP-UHFFFAOYSA-N 0.000 description 2
- RIWRBSMFKVOJMN-UHFFFAOYSA-N 2-methyl-1-phenylpropan-2-ol Chemical compound CC(C)(O)CC1=CC=CC=C1 RIWRBSMFKVOJMN-UHFFFAOYSA-N 0.000 description 2
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 description 2
- 239000012965 benzophenone Substances 0.000 description 2
- 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 2
- 229920001577 copolymer Polymers 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- -1 tackifiers Substances 0.000 description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 2
- QNODIIQQMGDSEF-UHFFFAOYSA-N (1-hydroxycyclohexyl)-phenylmethanone Chemical compound C=1C=CC=CC=1C(=O)C1(O)CCCCC1 QNODIIQQMGDSEF-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
- GJIIAJVOYIPUPY-UHFFFAOYSA-N 2-methylidenebut-3-enoic acid Chemical compound OC(=O)C(=C)C=C GJIIAJVOYIPUPY-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- FIYZNAKNHICPGB-UHFFFAOYSA-N [PH3]=O.C1(=CC=CC=C1)C=1C(=C(C(=C(C1C)C(=O)C(O)C1=CC=CC=C1)C)C1=CC=CC=C1)C Chemical compound [PH3]=O.C1(=CC=CC=C1)C=1C(=C(C(=C(C1C)C(=O)C(O)C1=CC=CC=C1)C)C1=CC=CC=C1)C FIYZNAKNHICPGB-UHFFFAOYSA-N 0.000 description 1
- GUCYFKSBFREPBC-UHFFFAOYSA-N [phenyl-(2,4,6-trimethylbenzoyl)phosphoryl]-(2,4,6-trimethylphenyl)methanone Chemical compound CC1=CC(C)=CC(C)=C1C(=O)P(=O)(C=1C=CC=CC=1)C(=O)C1=C(C)C=C(C)C=C1C GUCYFKSBFREPBC-UHFFFAOYSA-N 0.000 description 1
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000002318 adhesion promoter Substances 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 125000003236 benzoyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C(*)=O 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004581 coalescence Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000006352 cycloaddition reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- KEEXOYPZMIJIEP-UHFFFAOYSA-N diphenoxyphosphoryl 2,4,6-trimethylbenzoate Chemical compound CC1=CC(C)=CC(C)=C1C(=O)OP(=O)(OC=1C=CC=CC=1)OC1=CC=CC=C1 KEEXOYPZMIJIEP-UHFFFAOYSA-N 0.000 description 1
- 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 1
- 125000003055 glycidyl group Chemical group C(C1CO1)* 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- YLHXLHGIAMFFBU-UHFFFAOYSA-N methyl phenylglyoxalate Chemical compound COC(=O)C(=O)C1=CC=CC=C1 YLHXLHGIAMFFBU-UHFFFAOYSA-N 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
- AUONHKJOIZSQGR-UHFFFAOYSA-N oxophosphane Chemical compound P=O AUONHKJOIZSQGR-UHFFFAOYSA-N 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000006254 rheological additive Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Images
Classifications
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- 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
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
- C08K5/0025—Crosslinking or vulcanising agents; including accelerators
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
-
- 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
- C09J133/04—Homopolymers or copolymers of esters
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/10—Adhesives in the form of films or foils without carriers
-
- 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
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Adhesive Tapes (AREA)
Abstract
Description
本発明は、ディスプレイ用接着シート及びこの製造方法に関する。より具体的には、ディスプレイの段差（ｓｔｅｐ）又は屈曲への接着にも優れる、光学用透明接着（ＯＣＡ）フィルムを含む接着シート及びこの製造方法に関する。 TECHNICAL FIELD The present invention relates to an adhesive sheet for displays and a manufacturing method thereof. More specifically, the present invention relates to an adhesive sheet including an optical transparent adhesive (OCA) film, which is also excellent in adhesion to steps or bends of a display, and a method for producing the adhesive sheet.
ディスプレイを製造するためのパネル素材を組立てるために使用される部材である接着フィルムには、ディスプレイモジュールが発光する際に、これを透過させ得るように光学用透明接着（ＯＣＡ）フィルムが使用される。 An optical transparent adhesive (OCA) film is used for the adhesive film, which is a member used to assemble the panel material for manufacturing the display, so that when the display module emits light, it can be transmitted. .
一方、最近、情報通信技術の飛躍的な発展並びに市場の膨脹によって、ディスプレイとして、曲げ性のあるディスプレイが様々な用途と適用可能性により、脚光を浴びている。 On the other hand, recently, due to the rapid development of information and communication technology and expansion of the market, flexible displays have attracted attention due to their various uses and applicability.
段差又は屈曲のある部分が存在するディスプレイにおいて、パネル素材を組立てるために使用される部材である接着シートは、ディスプレイの段差又は屈曲にも浮き上がる現象なく、接着に優れるものが求められている。 Adhesive sheets, which are members used for assembling panel materials in displays with steps or bends, are required to have excellent adhesion without floating even on steps or bends of the display.
本発明は、ディスプレイの段差又は屈曲のある部分にも浮き上がる現象なく、接着に優れる、光学用透明接着（ＯＣＡ）フィルムを含むディスプレイ用接着シートを提供することを目的とする。 SUMMARY OF THE INVENTION An object of the present invention is to provide an adhesive sheet for a display, including an optical transparent adhesive (OCA) film, which is excellent in adhesion without the phenomenon of floating even in a stepped or curved portion of the display.
また、本発明によるディスプレイ用接着シートの製造方法を提供することを目的とする。 Another object of the present invention is to provide a method for producing an adhesive sheet for displays according to the present invention.
また、本発明によるディスプレイ用接着シートを用いてディスプレイパネル（ｐａｎｅｌ）を製造する方法を提供することを目的とする。 Another object of the present invention is to provide a method of manufacturing a display panel using the display adhesive sheet according to the present invention.
また、本発明によるディスプレイ用接着シートを含むディスプレイを提供することを目的とする。 Another object of the present invention is to provide a display including the display adhesive sheet according to the present invention.
本発明の目的は、以上に言及した目的に制限されず、言及していない本発明の他の目的及び長所は、下記の説明によって理解することができ、本発明の実施例によってより明らかに理解される。また、本発明の目的及び長所は、特許請求の範囲に示した手段及びその組み合わせによって実現できることが分かりやすい。 The objects of the present invention are not limited to those mentioned above, other objects and advantages of the present invention not mentioned can be understood from the following description and more clearly understood from the examples of the present invention. be done. Also, it is easy to understand that the objects and advantages of the present invention can be realized by the means and combinations thereof indicated in the claims.
上述した技術的課題を解決するために、本発明の一態様によるディスプレイ用接着シートは、アクリル系樹脂、ＵＶ開始剤、および後硬化（ｐｏｓｔ－ｃｕｒｅ）架橋剤を含む、接着組成物の硬化物である光学用透明接着（ＯＣＡ）フィルムを含み、前記後硬化架橋剤は、ケイ皮酸ビニル（ｖｉｎｙｌ ｃｉｎｎａｍａｔｅ）を含むことができる。前記光学用透明接着（ＯＣＡ）フィルムは、Ｂ－ステージ（Ｂ－ｓｔａｇｅ）状態であってもよい。前記光学用透明接着（ＯＣＡ）フィルムは、紫外線（ＵＶ）硬化前の６０℃及び１Ｈｚでのモデュラス（ｍｏｄｕｌｕｓ）が１０４Ｐａ～１０５Ｐａであり、紫外線（ＵＶ）硬化後の６０℃及び１Ｈｚでのモデュラスが１０５Ｐａ～１０６Ｐａであってもよい。 In order to solve the technical problems described above, an adhesive sheet for display according to one aspect of the present invention is a cured product of an adhesive composition containing an acrylic resin, a UV initiator, and a post-cure cross-linking agent. and the post-curing cross-linking agent may comprise vinyl cinnamate. The optical transparent adhesive (OCA) film may be in a B-stage state. The optical transparent adhesive (OCA) film has a modulus of 10 4 Pa to 10 5 Pa at 60° C. and 1 Hz before ultraviolet (UV) curing, and 60° C. and 1 Hz after ultraviolet (UV) curing. may have a modulus at 10 5 Pa to 10 6 Pa.
本発明の一態様によるディスプレイ用接着シートの製造方法は、アクリル系樹脂、ＵＶ開始剤、および後硬化架橋剤を混合して、接着組成物を得るステップと、第１離型フィルム上に、前記接着組成物を塗布した後、その上に第２離型フィルムを配置して、接着シート構造体を形成するステップと、前記形成された接着シート構造体に青色ＬＥＤランプを照射して、仮硬化（ｐｒｅ－ｈａｒｄｅｎｉｎｇ）し、前記塗布された接着組成物をＢ－ステージ（Ｂ－ｓｔａｇｅ）状態の光学用透明接着（ＯＣＡ）フィルムで形成するステップと、を含み、前記後硬化架橋剤は、ケイ皮酸ビニル（ｖｉｎｙｌ ｃｉｎｎａｍａｔｅ）を含むことができる。 A method for producing an adhesive sheet for a display according to one aspect of the present invention includes a step of mixing an acrylic resin, a UV initiator, and a post-curing cross-linking agent to obtain an adhesive composition; After applying the adhesive composition, a second release film is placed thereon to form an adhesive sheet structure, and the formed adhesive sheet structure is irradiated with a blue LED lamp to perform temporary curing. and pre-hardening to form the applied adhesive composition into a B-stage optical clear adhesive (OCA) film, wherein the post-curing cross-linking agent comprises silicone. Vinyl cinnamate may be included.
本発明の一態様によるディスプレイパネル（ｐａｎｅｌ）の製造方法は、前記ディスプレイ用接着シートから、前記光学用透明接着（ＯＣＡ）フィルムを抽出するステップと、一以上のディスプレイ部材上に、前記光学用透明接着（ＯＣＡ）フィルムを配置するステップと、前記光学用透明接着（ＯＣＡ）フィルムに紫外線（ＵＶ）を照射して、後硬化（ｐｏｓｔ－ｃｕｒｅ）するステップと、を含むことができる。前記一以上のディスプレイ部材は、段差（ｓｔｅｐ）又は屈曲を有してもよく、前記後硬化するステップによって、前記光学用接着フィルムが、前記段差又は屈曲に一致して接着されてもよい。 A method of manufacturing a display panel according to one aspect of the present invention includes the steps of: extracting the optical transparent adhesive (OCA) film from the display adhesive sheet; The method may include disposing an adhesive (OCA) film and irradiating the optical transparent adhesive (OCA) film with ultraviolet (UV) to post-cure. The one or more display members may have steps or bends, and the post-curing step may adhere the optical adhesive film conforming to the steps or bends.
本発明の一態様によるディスプレイは、本発明のディスプレイ用接着シートを含むことができる。 A display according to one aspect of the present invention can include the display adhesive sheet of the present invention.
本発明のディスプレイ用接着シートは、後硬化架橋剤を含むＢ－ステージ（Ｂ－ｓｔａｇｅ）状態の光学用透明接着（ＯＣＡ）フィルムを含み、前記光学用透明接着（ＯＣＡ）フィルムは、紫外線（ＵＶ）を照射して、後硬化（ａｆｔｅｒ－ｃｕｒｅ）するステップによって、モデュラス（ｍｏｄｕｌｕｓ）が増加するため、ディスプレイの段差又は屈曲のある部分にも浮き上がる現象なく、接着に優れる。 The display adhesive sheet of the present invention comprises an optical transparent adhesive (OCA) film in a B-stage state containing a post-curing cross-linking agent, and the optical transparent adhesive (OCA) film contains ultraviolet (UV) light. ) and after-cure, the modulus is increased, so that there is no lifting phenomenon even on a stepped or curved portion of the display, and adhesion is excellent.
本発明の効果は、以上に言及した効果に制限されず、言及していないさらに他の効果は、下記の記載から当業者にとって明確に理解される。上述した効果並びに本発明の具体的な効果は、以下の発明を実施するための具体的な事項を説明すると共に記述する。 The effects of the present invention 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 following description. The above-mentioned effects and specific effects of the present invention will be described while explaining specific matters for carrying out the invention below.
前述した目的、特徴及び長所は、添付の図面を参照して詳細に後述され、これによって、本発明の属する技術分野における通常の知識を有する者は、本発明の技術思想を容易に実施することができる。本発明を説明することにおいて、本発明に系る公知技術に対する具体的な説明が、本発明の要旨を曖昧にすると判断される場合には詳細な説明を省略する。以下では、添付の図面を参照して、本発明による好ましい実施例を詳説することとする。図面における同じ参照符号は、同一又は類似の構成要素を示すために使われる。 The above objects, features and advantages will be described in detail below with reference to the accompanying drawings, so that those skilled in the art to which the present invention pertains can easily implement the technical ideas of the present invention. can be done. In describing the present invention, detailed descriptions of well-known technologies related to the present invention will be omitted if it is determined that the gist of the present invention is vague. Preferred embodiments according to the invention will now be described in detail with reference to the accompanying drawings. The same reference numbers in the drawings are used to designate the same or similar components.
本明細書における構成要素の「上部（又は下部）」又は構成要素の「上（又は下）」に任意の構成が配されるということは、任意の構成が上記構成要素の上面（又は下面）に接して配されるだけでなく、上記構成要素と、上記構成要素上に（又は下に）配された任意の構成との間に他の構成が介在し得ることを意味する。 Arrangement of any structure on the “top (or bottom)” of a component or “top (or bottom)” of a component in this specification means that any structure is placed on the top (or bottom) surface of the component This means that there may be other features interposed between the component and any features placed above (or below) the component, as well as being placed in contact with.
本明細書で使われる単数の表現は、文脈上明白に他に意味しない限り、複数の表現を含む。本出願における「構成される」又は「含む」などの用語は、明細書上に記載した様々な構成要素を必ずしも全て含むと解釈してはならず、そのうち一部の構成要素は、含まれなくてもよく、又はさらなる構成要素をさらに含んでいてもよいと解釈すべきである。 As used herein, singular expressions include plural expressions unless the context clearly dictates otherwise. Terms such as "consisting of" or "including" in this application are not to be construed as necessarily including all of the various components described above, some of which may be excluded. or may further include additional components.
本発明の一態様によるディスプレイ用接着シートは、アクリル系樹脂、ＵＶ開始剤、および後硬化（ｐｏｓｔ－ｃｕｒｅ）架橋剤を含む、接着組成物の硬化物である光学用透明接着（ＯＣＡ）フィルムを含むことを技術的特徴とする。 An adhesive sheet for a display according to one aspect of the present invention comprises an optical transparent adhesive (OCA) film which is a cured product of an adhesive composition containing an acrylic resin, a UV initiator, and a post-cure cross-linking agent. It is a technical feature to include
前記光学用透明接着（ＯＣＡ）フィルムは、Ｂ－ステージ（Ｂ－ｓｔａｇｅ）、つまり、半硬化状態であるのが好ましい。半硬化状態の光学用透明接着（ＯＣＡ）フィルムは、前記接着組成物に青色ＬＥＤランプを照射して、仮硬化（ｐｒｅ－ｈａｒｄｅｎｉｎｇ）させることで形成することができる。これらＢ－ステージの光学用透明接着（ＯＣＡ）フィルムは、硬化し切れた状態ではないため、ディスプレイに適用する際、ディスプレイ部材における屈曲した部分又は段差の存在する部分にも浮き上がることなく、適用できるという利点がある。 Preferably, the optical transparent adhesive (OCA) film is in a B-stage, that is, in a semi-cured state. A semi-cured optical transparent adhesive (OCA) film can be formed by irradiating the adhesive composition with a blue LED lamp for pre-hardening. Since these B-stage optical transparent adhesive (OCA) films are not completely cured, when applied to a display, they can be applied to a bent portion or a stepped portion of the display member without floating. There is an advantage.
本発明の好ましい後硬化架橋剤は、ケイ皮酸ビニル（ｖｉｎｙｌ ｃｉｎｎａｍａｔｅ）を含むことができる。光学用透明接着（ＯＣＡ）フィルムが、Ｂ－ステージ状態であるときは、ケイ皮酸ビニルは、架橋反応が行われないまま、接着組成物に存在する。 A preferred post-curing crosslinker of the present invention may comprise vinyl cinnamate. When the optical clear adhesive (OCA) film is in the B-stage state, the vinyl cinnamate is present in the adhesive composition without undergoing the cross-linking reaction.
ところが、前記Ｂ－ステージの光学用透明接着（ＯＣＡ）フィルムをディスプレイパネルに付着した後、紫外線（ＵＶ）を照射して硬化させると（後硬化に該当する）、ビニル基（ｖｉｎｙｌ ｇｒｏｕｐ）間の環化添加反応（Ｃｙｃｌｏ Ａｄｄｉｔｉｏｎ Ｒｅａｃｔｉｏｎ）により架橋化（ｃｒｏｓｓ－ｌｉｎｋｉｎｇ）が行われて、接着特性を発揮することができるようになる。 However, when the B-stage optical transparent adhesive (OCA) film is adhered to the display panel and then cured by irradiating ultraviolet (UV) light (corresponding to post-curing), the vinyl groups are separated from each other. The Cyclo Addition Reaction causes cross-linking to enable adhesion properties.
このように、本発明は、光学用透明接着（ＯＣＡ）フィルムを、仮硬化（一次硬化）された状態でディスプレイパネルに適用するため、ディスプレイ部材のうち、屈曲又は段差のある部分にも浮き上がり現象を最小化するか、除去した状態で密着して接着されてもよく、また、この後、紫外線（ＵＶ）硬化（２次硬化）を行うことによって、ディスプレイパネルの部材間の接着に優れるという利点がある。 Thus, in the present invention, since the optical transparent adhesive (OCA) film is applied to the display panel in a temporarily cured (primary cured) state, the floating phenomenon occurs even in curved or stepped portions of the display member. may be closely adhered while minimizing or removing , and then ultraviolet (UV) curing (secondary curing) is performed, which has the advantage of excellent adhesion between members of the display panel. There is
前記光学用透明接着（ＯＣＡ）フィルムは、紫外線（ＵＶ）硬化前の６０℃及び１Ｈｚでのモデュラス（ｍｏｄｕｌｕｓ）が１０４Ｐａ～１０５Ｐａであってもよく、より好ましくは、１０４Ｐａ～０．９５×１０５Ｐａであってもよい。紫外線（ＵＶ）硬化前のモデュラスが１０４Ｐａ未満である場合、フィルム打ち抜き時、形状維持が不可能であるか、ムラが発生し得る。 The optical transparent adhesive (OCA) film may have a modulus of 10 4 Pa to 10 5 Pa at 60° C. and 1 Hz before ultraviolet (UV) curing, more preferably 10 4 Pa to It may be 0.95×10 5 Pa. If the modulus before ultraviolet (UV) curing is less than 10 4 Pa, it may not be possible to maintain the shape or may cause unevenness during film punching.
また、前記光学用透明接着（ＯＣＡ）フィルムは、紫外線（ＵＶ）硬化後の６０℃及び１Ｈｚでのモデュラスが１０５Ｐａ～１０６Ｐａであってもよく、より好ましくは、１．５×１０５Ｐａ～１０６Ｐａであってもよい。紫外線（ＵＶ）硬化後のモデュラスが１０６Ｐａを超える場合、フィルム硬度（ｈａｒｄｎｅｓｓ）が増加しすぎて、合着時に浮き上がりが発生して、段差を克服し難しいことがある。 Further, the optical transparent adhesive (OCA) film may have a modulus of 10 5 Pa to 10 6 Pa at 60° C. and 1 Hz after ultraviolet (UV) curing, more preferably 1.5×10 It may be from 5 Pa to 10 6 Pa. If the modulus after ultraviolet (UV) curing exceeds 10 6 Pa, the hardness of the film may increase excessively, causing lifting during bonding and making it difficult to overcome a step.
以下では、本発明の光学用透明接着（ＯＣＡ）フィルムを形成するための接着組成物の成分について説明する。 The components of the adhesive composition for forming the optical transparent adhesive (OCA) film of the present invention are described below.
＜アクリル系樹脂＞
本発明の接着組成物のアクリル系樹脂は、光学用透明接着（ＯＣＡ）フィルムを形成し、紫外線（ＵＶ）硬化用樹脂として通常使用され得るものであれば、制限なく使用することができる。
<Acrylic resin>
The acrylic resin of the adhesive composition of the present invention can be used without limitation as long as it forms an optical transparent adhesive (OCA) film and can be normally used as an ultraviolet (UV) curable resin.
本発明の接着組成物のアクリル系樹脂は、好ましくは、アクリル単量体の共重合体であってもよい。 The acrylic resin of the adhesive composition of the present invention may preferably be a copolymer of acrylic monomers.
前記アクリル単量体は、２－エチルヘキシルアクリレート（２－ＥＨＡ）、イソボルニルアクリレート（ＩＢＯＡ）、ラウリル（メタ）アクリレートなどのアルキル（メタ）アクリレート、２－ヒドロキシエチルアクリレートなどのヒドロキシル基含有アルキル（メタ）アクリレート、アクリルアマイド（ＡＡＭ）、グリシジル（メタ）アクリレート、アクリロイルモルフォリン（ＡＣＭＯ）、ビニルアクリル酸（ＡＡ）、および（メタ）アクリル酸から構成された群より選ばれる１種以上であってもよい。 The acrylic monomers include alkyl (meth)acrylates such as 2-ethylhexyl acrylate (2-EHA), isobornyl acrylate (IBOA), lauryl (meth)acrylate, and hydroxyl group-containing alkyl (such as 2-hydroxyethyl acrylate). One or more selected from the group consisting of meth)acrylate, acrylamide (AAM), glycidyl (meth)acrylate, acryloylmorpholine (ACMO), vinyl acrylic acid (AA), and (meth)acrylic acid good too.
本発明のアクリル系樹脂は、好ましくは、イソボルニルアクリレート（ＩＢＯＡ）、２－エチルヘキシルアクリレート（２－ＥＨＡ）、２－ヒドロキシエチルアクリレート、アクリロイルモルフォリン（ＡＣＭＯ）、ラウリルアクリレート（ＬＡ）の共重合体であってもよい。 The acrylic resin of the present invention is preferably a copolymer of isobornyl acrylate (IBOA), 2-ethylhexyl acrylate (2-EHA), 2-hydroxyethyl acrylate, acryloylmorpholine (ACMO) and lauryl acrylate (LA). It may be a coalescence.
＜ＵＶ開始剤＞
本発明のＵＶ開始剤は、アクリル系樹脂に添加される添加剤成分であって、紫外線（ＵＶ）が照射されると、重合（ｐｏｌｙｍｅｒｉｚａｔｉｏｎ）反応を開始させる物質である。ＵＶ開始剤は、通常のＵＶ開始剤として使用されるものであれば、制限なく含んでいてもよく、１種以上のＵＶ開始剤を混合して使用することもできる。
<UV initiator>
The UV initiator of the present invention is an additive component added to the acrylic resin, and is a substance that initiates a polymerization reaction when irradiated with ultraviolet rays (UV). Any UV initiator that is commonly used as a UV initiator may be included without limitation, and one or more UV initiators may be mixed and used.
前記ＵＶ開始剤は、１－ヒドロキシ－シクロヘキシル－フェニル－ケトン（Ｉｒｇａｃｕｒｅ ９０７）、２－メチル１［４－（メチルチオ）フェニル］－２－モルホリノプロパン－１－オン（Ｉｒｇａｃｕｒｅ １８４Ｃ）、２－ヒドロキシ－２－メチル－１－フェニル－１－プロパノン（Ｄａｒｏｃｕｒ １１７３）、イルガキュア１８４Ｃとベンゾフェノン（ｂｅｎｚｏｐｈｅｎｏｎｅ）との混合開始剤（Ｉｒｇａｃｕｒｅ ５００）、イルガキュア１８４Ｃとイルガキュア１１７３との混合開始剤（Ｉｒｇａｃｕｒｅ １０００）、２－ヒドロキシ－１－［４－（２－ヒドロキシエトキシ）フェニル］－２－メチル－１－プロパノン（Ｉｒｇａｃｕｒｅ ２９５９）、ベンゾイルぎ酸メチル（Ｄａｒｏｃｕｒ ＭＢＦ）、α，α－ジメトキシ－アルファ－フェニルアセトフェノン（Ｉｒｇａｃｕｒｅ ６５１）、２－ベンジル－２－（ジメチルアミノ）－１－［４－（４－モルフォリノ）フェニル］－１－ブタノン（Ｉｒｇａｃｕｒｅ ３６９）、イルガキュア３６９とイルガキュア６５１との混合開始剤（Ｉｒｇａｃｕｒｅ １３００）、ジフェニル（２，４，６－トリメチルベンゾイン）－ホスフィンオキシド（Ｄａｒｏｃｕｒ ＴＰＯ）、ダロキュアＴＰＯとダロキュア１１７３との混合開始剤（Ｄａｒｏｃｕｒ ４２６５）、ホスフィンオキシド（ｐｈｏｓｐｈｉｎｅ ｏｘｉｄｅ）フェニルビス（２，４，６，－トリメチルベンゾイル）（Ｉｒｇａｃｕｒｅ ８１９）、イルガキュア８１９とダロキュア１１７３との混合開始剤（Ｉｒｇａｃｕｒｅ ２００５）、イルガキュア８１９とダロキュア１１７３との混合開始剤（Ｉｒｇａｃｕｒｅ ２０１０）、イルガキュア８１９とダロキュア１１７３との混合開始剤（Ｉｒｇａｃｕｒｅ ２０２０）、ビス（エタ５－２，４，－シクロペンタジエン－１－イル）ビス［２，６－ジフルオロ－３－（１Ｈ－ピロール－１－イル）フェニル］チタニウム（Ｉｒｇａｃｕｒｅ ７８４）、およびベンゾフェノンが含有された混合開始剤（ＨＳＰ１８８）から選ばれた１種以上を含むことができる。 The UV initiators are 1-hydroxy-cyclohexyl-phenyl-ketone (Irgacure 907), 2-methyl 1[4-(methylthio)phenyl]-2-morpholinopropan-1-one (Irgacure 184C), 2-hydroxy- 2-methyl-1-phenyl-1-propanone (Darocur 1173), initiator mixture of Irgacure 184C and benzophenone (Irgacure 500), initiator mixture of Irgacure 184C and Irgacure 1173 (Irgacure 1000), 2- Hydroxy-1-[4-(2-hydroxyethoxy)phenyl]-2-methyl-1-propanone (Irgacure 2959), methyl benzoylformate (Darocur MBF), α,α-dimethoxy-alpha-phenylacetophenone (Irgacure 651 ), 2-benzyl-2-(dimethylamino)-1-[4-(4-morpholino)phenyl]-1-butanone (Irgacure 369), mixed initiator of Irgacure 369 and Irgacure 651 (Irgacure 1300), diphenyl (2,4,6-trimethylbenzoin)-phosphine oxide (Darocur TPO), mixed initiator for Darocur TPO and Darocur 1173 (Darocur 4265), phosphine oxide phenylbis(2,4,6,-trimethyl benzoyl) (Irgacure 819), initiator mixture of Irgacure 819 and Darocure 1173 (Irgacure 2005), initiator mixture of Irgacure 819 and Darocure 1173 (Irgacure 2010), initiator mixture of Irgacure 819 and Darocure 1173 (Irgacure 2020) ), bis(eth-5-2,4-cyclopentadien-1-yl)bis[2,6-difluoro-3-(1H-pyrrol-1-yl)phenyl]titanium (Irgacure 784), and benzophenone It can contain one or more selected from the mixed initiators (HSP188) selected from
本発明のＵＶ開始剤は、アクリル系樹脂１００重量部を基準に、０．１～５．０重量部で含むのが好ましく、０．１～２．０重量部で含むのがより好ましい。ＵＶ開始剤が０．１重量部未満である場合、アクリル系樹脂の硬化反応が十分行われず、５．０重量部を超える場合、接着フィルムの硬化密度が低下して、接着特性が十分発現しない問題が発生し得る。 The UV initiator of the present invention is preferably contained in an amount of 0.1 to 5.0 parts by weight, more preferably 0.1 to 2.0 parts by weight based on 100 parts by weight of the acrylic resin. If the amount of the UV initiator is less than 0.1 parts by weight, the curing reaction of the acrylic resin will not be sufficiently carried out, and if it exceeds 5.0 parts by weight, the cured density of the adhesive film will decrease, and the adhesive properties will not be sufficiently exhibited. Problems can arise.
本発明のＵＶ開始剤としては、長波長ＵＶ開始剤０．０１～０．２重量部と、短波長ＵＶ開始剤０．２～１．０重量部との混合物を使用するのがより好ましい。前記長波長ＵＶ開始剤としては、ダロキュアＴＰＯ（２，４，６－ｔｒｉｍｅｔｈｙｌｂｅｎｚｏｙｌ－ｄｉｐｈｅｎｙｌｐｈｏｓｐｈｉｎｅ ｏｘｉｄｅ）、ダロキュアＴＰＯ－Ｌ（２，４，６－ｔｒｉｍｅｔｈｙｌｂｅｎｚｏｙｌ－ｄｉｐｈｅｎｙｌ ｐｈｏｓｐｈｉｎａｔｅ）イルガキュア８１９（ｂｉｓ（２，４，６－ｔｒｉｍｅｔｈｙｌｂｅｎｚｏｙｌ）－ｐｈｅｎｙｌｐｈｏｓｐｈｉｎｅ ｏｘｉｄｅ）などを例に挙げられるし、短波長ＵＶ開始剤としては、イルガキュア１８４（１－ｈｙｄｒｏｘｙ－ｃｙｃｌｏｈｅｘｙｌ－ｐｈｅｎｙｌ－ｋｅｔｏｎｅ）、ダロキュア１１７３（２－ｈｙｄｒｏｘｙ－２－ｍｅｔｈｙｌ－１－ｐｈｅｎｙｌ－１－ｐｒｏｐａｎｏｎｅ）、イルガキュア１２７（２－ｈｙｄｒｏｘｙ－１－{４－［４－（２－ｈｙｄｒｏｘｙ－２－ｍｅｔｈｙｌ－ｐｒｏｐｉｏｎｙｌ）－ｂｅｎｚｙｌ］－ｐｈｅｎｙｌ}－２－ｍｅｔｈｙｌｐｒｏｐａｎ－１－ｏｎｅ）を例に挙げられるものの、これに限定されない。 More preferably, the UV initiator used in the present invention is a mixture of 0.01 to 0.2 parts by weight of a long wavelength UV initiator and 0.2 to 1.0 parts by weight of a short wavelength UV initiator. Examples of the long-wavelength UV initiator include Darocure TPO (2,4,6-trimethylbenzoyl-diphenylphosphine oxide), Darocure TPO-L (2,4,6-trimethylbenzoyl-diphenyl phosphate), Irgacure 819 (bis(2,4,6 -trimethylbenzoyl)-phenylphosphine oxide), and short wavelength UV initiators include Irgacure 184 (1-hydroxy-cyclohexyl-phenyl-ketone), Darocure 1173 (2-hydroxy-2-methyl-1- phenyl-1-propanone), Irgacure 127 (2-hydroxy-1-{4-[4-(2-hydroxy-2-methyl-propionyl)-benzyl]-phenyl}-2-methylpropan-1-one) However, it is not limited to this.
長波長ＵＶ開始剤を０．０１重量部未満で使用する場合、未硬化の発生によるフィルムムラが発生し得、０．２重量部を超えて使用する場合、過硬化により、半硬化状態（Ｂ－Ｓｔａｇｅ）の光学用透明接着（ＯＣＡ）フィルムを製造しにくいこともある。一方、短波長ＵＶ開始剤を０．２重量部未満で使用する場合、後硬化時、未反応モノマーの完全硬化が不可能であり得、１．０重量部を超えて使用する場合、過硬化により、硬化後の収縮率が増加し得る。 When the long-wavelength UV initiator is used at less than 0.01 parts by weight, film unevenness may occur due to the occurrence of uncured. -Stage) optical transparent adhesive (OCA) films are sometimes difficult to manufacture. On the other hand, if the short wavelength UV initiator is used at less than 0.2 parts by weight, it may not be possible to completely cure the unreacted monomer during post-curing. may increase shrinkage after curing.
＜後硬化架橋剤＞
本発明の後硬化架橋剤は、ＬＥＤランプの照射による一次硬化（仮硬化）では、環化添加反応が行われず、紫外線（ＵＶ）照射による二次硬化（後硬化）により、環化添加反応が行われて、架橋化（ｃｒｏｓｓ－ｌｉｎｋｉｎｇ）が起こり得る特性を備えるのが好適である。
<Post-curing cross-linking agent>
In the post-curing cross-linking agent of the present invention, the cyclization addition reaction does not occur in the primary curing (temporary curing) by LED lamp irradiation, and the cyclization addition reaction occurs in the secondary curing (post-curing) by ultraviolet (UV) irradiation. It is preferably carried out with the property that cross-linking can occur.
上記特性を有する後硬化架橋剤は、ケイ皮酸ビニル（ｖｉｎｙｌ ｃｉｎｎａｍａｔｅ）であるのが好ましい。ケイ皮酸ビニル（ｖｉｎｙｌ ｃｉｎｎａｍａｔｅ）は、紫外線（ＵＶ）照射によって、ビニル基（ｖｉｎｙｌ ｇｒｏｕｐ）間の環化添加反応が行われ得るため、後硬化架橋剤として好適である。 The post-curing crosslinker having the above properties is preferably vinyl cinnamate. Vinyl cinnamate is suitable as a post-curing crosslinker because upon ultraviolet (UV) irradiation, a cyclization addition reaction between vinyl groups can occur.
本発明の後硬化架橋剤は、アクリル系樹脂１００重量部を基準に、１．０～５．０重量部で含むのが好ましく、２．０～５．０重量部で含むのがより好ましい。 The post-curing crosslinking agent of the present invention is preferably contained in an amount of 1.0 to 5.0 parts by weight, more preferably 2.0 to 5.0 parts by weight, based on 100 parts by weight of the acrylic resin.
後硬化架橋剤が１．０重量部未満である場合、環化添加反応が十分行われないし、５．０重量部を超える場合、架橋反応が発生しすぎて、硬化後の収縮率が大きくなり、収縮によるパネルが反る現象が発生し得る。 If the amount of the post-curing cross-linking agent is less than 1.0 parts by weight, the cyclization addition reaction will not be sufficiently carried out, and if it exceeds 5.0 parts by weight, the cross-linking reaction will occur too much and the shrinkage after curing will increase. , the panel may warp due to shrinkage.
本発明の光学用透明接着（ＯＣＡ）フィルムを形成するための接着組成物は、アクリル系樹脂、ＵＶ開始剤、および後硬化架橋剤のほか、必要に応じて、本発明の効果を発現し得る範囲内における他の添加剤を少量さらに含むことができる。前記添加剤は、例えば、接着促進剤、粘着付与剤、可塑剤、流動補助剤、湿潤補助剤、レオロジー改質剤、および酸化防止剤などから選ぶことができる。 The adhesive composition for forming the optical transparent adhesive (OCA) film of the present invention contains an acrylic resin, a UV initiator, a post-curing cross-linking agent, and, if necessary, the effects of the present invention. Minor amounts of other additives within the scope may also be included. Said additives can be selected from, for example, adhesion promoters, tackifiers, plasticizers, flow aids, wetting aids, rheology modifiers, antioxidants, and the like.
本発明の一態様によれば、図１に示されたように、本発明の一態様によるディスプレイ用接着シート１００は、光学用透明接着（ＯＣＡ）フィルム１０と、この両面に配置される第１離型フィルム２１と、第２離型フィルム２２と、を含むことができる。前記離型フィルムは、基材の一面が離型処理されたものであってもよい。
According to one aspect of the present invention, as shown in FIG. 1, a display
前記基材は、ポリエチレンテレフタラート（ｐｏｌｙｅｔｈｙｌｅｎｅ ｔｅｒｅｐｈｔｈａｌａｔｅ；ＰＥＴ）基材を含んでいてもよいが、これに限定されるものではない。前記離型処理は、当業界における通常に離型処理に使用できる物質であれば、制限なく使用することができ、例えば、シリコンで離型処理することが好ましい。 The substrate may include, but is not limited to, a polyethylene terephthalate (PET) substrate. For the release treatment, any substance that can be normally used for release treatment in the industry can be used without limitation. For example, it is preferable to perform the release treatment with silicon.
本発明の他の一態様によれば、上述した本発明のディスプレイ用接着シートの製造方法を提供する。前記ディスプレイ用接着シートの製造方法は、アクリル系樹脂、ＵＶ開始剤、および後硬化架橋剤を混合して、接着組成物を得るステップと、第１離型フィルム上に、前記接着組成物を塗布した後、その上に第２離型フィルムを配置して、接着シート構造体を形成するステップと、前記形成された接着シート構造体に青色ＬＥＤランプを照射して、仮硬化（ｐｒｅ－ｈａｒｄｅｎｉｎｇ）し、前記塗布された接着組成物をＢ－ステージ（Ｂ－ｓｔａｇｅ）状態の光学用透明接着（ＯＣＡ）フィルムで形成するステップと、を含み、前記後硬化架橋剤は、ケイ皮酸ビニルを含む。 According to another aspect of the present invention, there is provided a method for producing the adhesive sheet for displays of the present invention described above. The method for producing the display adhesive sheet includes the step of mixing an acrylic resin, a UV initiator, and a post-curing cross-linking agent to obtain an adhesive composition, and applying the adhesive composition onto a first release film. After that, placing a second release film thereon to form an adhesive sheet structure; and irradiating the formed adhesive sheet structure with a blue LED lamp to perform pre-hardening. and forming the applied adhesive composition into a B-stage optical transparent adhesive (OCA) film, wherein the post-curing cross-linking agent comprises vinyl cinnamate. .
本発明のさらに他の一態様によれば、上述した本発明のディスプレイ用接着シートを使用して、ディスプレイパネル（ｐａｎｅｌ）を製造する方法を提供する。前記ディスプレイパネル（ｐａｎｅｌ）の製造方法は、上述した本発明のディスプレイ用接着シートから、前記光学用透明接着（ＯＣＡ）フィルムを抽出するステップと、一以上のディスプレイ部材上に、前記光学用透明接着（ＯＣＡ）フィルムを配置するステップと、前記光学用透明接着（ＯＣＡ）フィルムに紫外線（ＵＶ）を照射して、後硬化するステップと、を含むことができる。前記一以上のディスプレイ部材は、段差（ｓｔｅｐ）又は屈曲を有し得、前記後硬化するステップによって、前記光学用接着フィルムが、前記段差又は屈曲に一致して接着されてもよい。 According to still another aspect of the present invention, there is provided a method of manufacturing a display panel using the display adhesive sheet of the present invention. The method for manufacturing the display panel includes the step of extracting the optical transparent adhesive (OCA) film from the display adhesive sheet of the present invention described above; placing an (OCA) film; and irradiating the optical transparent adhesive (OCA) film with ultraviolet (UV) to post-cure. The one or more display members may have steps or bends, and the post-curing step may adhere the optical adhesive film conforming to the steps or bends.
本発明のさらに他の一態様によれば、上述した本発明のディスプレイ用接着シートを含むディスプレイを提供することができる。本発明のディスプレイは、ディスプレイの部材に存在する段差又は屈曲にも一致して接着され得る、本発明の光学用透明接着（ＯＣＡ）フィルムによって接着されたため、接着信頼性に優れる。 According to still another aspect of the present invention, it is possible to provide a display containing the adhesive sheet for a display of the present invention described above. Since the display of the present invention is adhered by the optical transparent adhesive (OCA) film of the present invention, which can be adhered to conform to steps or bends existing in the members of the display, it has excellent adhesion reliability.
以下では、本発明の好ましい実施例によって、本発明の構成及び作用をさらに詳説することとする。ただ、これは、本発明の好ましい例示として提示されたものであり、如何なる意味でも、これによって本発明が制限されると解釈されてはならない。 In the following, 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 should not be construed as limiting the present invention in any way.
ここに記載されていない内容は、この技術分野における通常の当業者であれば、技術的に十分類推することができるため、その説明を省略することとする。 Details not described here can be technically inferred by those of ordinary skill in this technical field, and therefore description thereof will be omitted.
＜実施例１＞
（１）アクリル系主剤樹脂の製造
イソボルニルアクリレート（ＩＢＯＡ）３５重量部、 ２－エチルヘキシルアクリレート（２－ＥＨＡ）４５重量部、２－ヒドロキシエチルアクリレート２０重量部、アクリロイルモルフォリン（ＡＣＭＯ）５重量部、およびラウリルアクリレート（ＬＡ）５重量部を混合した後、共重合して、アクリル系樹脂を得た。
<Example 1>
(1) Production of acrylic base resin 35 parts by weight of isobornyl acrylate (IBOA), 45 parts by weight of 2-ethylhexyl acrylate (2-EHA), 20 parts by weight of 2-hydroxyethyl acrylate, 5 parts by weight of acryloylmorpholine (ACMO) and 5 parts by weight of lauryl acrylate (LA) were mixed and then copolymerized to obtain an acrylic resin.
（２）接着組成物の製造
前記アクリル系樹脂１００重量部に対して、ＵＶ開始剤であるダロキュアＴＰＯ０．０９重量部とダロキュア１１７３０．６重量部との混合ＵＶ開始剤０．６９重量部、後硬化架橋剤であるケイ皮酸ビニル５重量部の材料を混合して、接着組成物を製造した。
(2) Production of the adhesive composition Per 100 parts by weight of the acrylic resin, 0.69 parts by weight of a UV initiator, a mixture of 0.09 parts by weight of Darocure TPO and 0.630.6 parts by weight of Darocure 11730.6 parts by weight. An adhesive composition was prepared by mixing 5 parts by weight of vinyl cinnamate, a curing cross-linking agent.
（３）第１離型フィルム及び第２離型フィルムの製造
２つのＰＥＴ基材を準備して、各ＰＥＴ基材の下部面にシリコン離型剤を薄膜塗布し、シリコン離型処理された第１離型フィルム（重剥離（ｈｅａｖｙ－ｒｅｌｅａｓｅ）離型フィルム）及び第２離型フィルム（軽剥離（ｌｉｇｈｔ－ｒｅｌｅａｓｅ）離型フィルム）を準備した。
(3) Production of the first release film and the second release film Two PET substrates were prepared, a thin film of silicon release agent was applied to the lower surface of each PET substrate, and the silicon mold release treated second layer was coated. A first release film (heavy-release release film) and a second release film (light-release release film) were prepared.
（４）接着シートの製造
前記第１離型フィルム上に、前記（２）で製造した接着組成物を塗布して、厚さ２００μｍの光学用透明接着（ＯＣＡ）フィルムを形成した。その後、前記光学用透明接着（ＯＣＡ）フィルム上に、前記第２離型フィルムが相接するように配置して、接着シート構造体を形成した。前記接着シート構造体上に青色ＬＥＤランプ（波長：３６５ｎｍ）を照射して、仮硬化（一次硬化）を行った。
(4) Production of Adhesive Sheet The adhesive composition produced in (2) above was applied onto the first release film to form an optical transparent adhesive (OCA) film having a thickness of 200 μm. Thereafter, the second release film was placed on the optical transparent adhesive (OCA) film so as to be in contact with each other to form an adhesive sheet structure. Temporary curing (primary curing) was performed by irradiating the adhesive sheet structure with a blue LED lamp (wavelength: 365 nm).
＜比較例１＞
上記実施例１と同様の方法により接着シートを製造するものの、ステップ（２）における後硬化架橋剤を添加していない接着組成物を使用した点でのみ相違する。
<Comparative Example 1>
An adhesive sheet was produced in the same manner as in Example 1 above, but the only difference was that an adhesive composition containing no post-curing cross-linking agent was used in step (2).
＜実験例：モデュラス（ｍｏｄｕｌｕｓ）の測定＞
上記実施例１及び比較例１の接着シートに対して、モデュラスを測定するために、光学用透明接着（ＯＣＡ）フィルムのみを抽出して、サンプル化しており、その方法は、次のとおりである。
<Experimental example: measurement of modulus>
In order to measure the modulus of the adhesive sheets of Example 1 and Comparative Example 1, only optical transparent adhesive (OCA) films were extracted and sampled. The method is as follows. .
サンプル化方法
上記実施例１及び比較例１それぞれから両面の離型フィルムを除去し、接着層を抽出して、２００μｍの光学用透明接着（ＯＣＡ）フィルムをサンプル化し、この過程を３回繰り返して、２００μｍの光学用透明接着（ＯＣＡ）フィルムを３つ積層し、総厚さ６００μｍの光学用透明接着（ＯＣＡ）フィルムサンプルを準備した。
Sampling method Remove the release films on both sides from each of the above Example 1 and Comparative Example 1, extract the adhesive layer, sample a 200 μm optical transparent adhesive (OCA) film, and repeat this process three times. , and three 200 μm optical transparent adhesive (OCA) films were laminated to prepare an optical transparent adhesive (OCA) film sample with a total thickness of 600 μm.
モデュラスの測定方法
上記実施例１及び比較例１それぞれの光学用透明接着（ＯＣＡ）フィルムのサンプルに対して、測定装備であるレオメーター（Ｒｈｅｏｍｅｔｅｒ，ＴＡ ｉｎｓｔｒｕｍｅｎｔ，ＡＲＥＳ Ｇ２）を用いて、軸方向力（Ａｘｉａｌ ｆｏｒｃｅ）２Ｎ、開始温度（Ｓｔａｒｔ Ｔｅｍｐ．）－５５℃、終決温度（Ｅｎｄ Ｔｅｍｐ．）２５０℃、昇温速度１０℃／ｍｉｎ、ストレイン（ｓｔｒａｉｎ）１％、および頻度（Ｆｒｅｑｕｅｎｃｙ）１Ｈｚの条件で、温度によるモデュラス（ｓｔｏｒａｇｅ ｍｏｄｕｌｕｓ）を測定しており、これを紫外線（ＵＶ）照射の前後それぞれに対して測定した。
Method for measuring modulus The optical transparent adhesive (OCA) film samples of Example 1 and Comparative Example 1 were measured using a rheometer (Rheometer, TA instrument, ARES G2), which is a measuring equipment, to measure the axial force. (Axial force) 2N, Start Temp. -55°C, End Temp. 250°C,
前記測定によって、フローティングされる資料（図３）から測定された６０℃でのモデュラス値を下記の表１に示した。 The modulus values at 60° C. measured from the floating samples (FIG. 3) are shown in Table 1 below.
上記表１から分かるように、後硬化架橋剤であるケイ皮酸ビニルを含む、接着組成物で製造した光学用透明接着（ＯＣＡ）フィルムである実施例１は、そうでない比較例１に比べて、ＵＶ照射後、モデュラスの増加幅が上昇し、屈曲又は段差のあるディスプレイ部材に浮き上がることなく、密着して接着力を発現できる特性を有することが分かる。 As can be seen from Table 1 above, Example 1, which is an optical clear adhesive (OCA) film made with an adhesive composition that includes vinyl cinnamate, a post-curing cross-linking agent, performs better than Comparative Example 1, which does not. , After UV irradiation, the modulus increases, and it can be seen that it has the property of being able to adhere to a curved or stepped display member without floating and exhibit adhesive strength.
以上のように、本発明について例示の図面を参照して説明したが、本発明は、本明細書に開示の実施例と図面によって限定されるものではなく、本発明の技術思想の範囲内における通常の技術者によって様々な変形が行われることは自明である。さらに、本発明の実施例を前述しつつ、本発明の構成による作用効果を明示的に記載して説明しなかったとしても、該構成によって予測可能な効果も認めるべきであることは当然である。 As described above, the present invention has been described with reference to the exemplary drawings. Obviously, various modifications can be made by those of ordinary skill in the art. Furthermore, while the embodiments of the present invention have been described above, even if the effects of the configuration of the present invention are not explicitly described and explained, it is natural that the predictable effects of the configuration should also be recognized. .
１０ 接着シート
２１ 第１離型フィルム
２２ 第２離型フィルム
10
Claims (14)
前記後硬化架橋剤は、ケイ皮酸ビニル（ｖｉｎｙｌ ｃｉｎｎａｍａｔｅ）を含むことを特徴とする、
ディスプレイ用接着シート。 An optical clear adhesive (OCA) film that is a cured adhesive composition comprising an acrylic resin, a UV initiator, and a post-cure crosslinker;
The post-curing cross-linking agent comprises vinyl cinnamate,
Adhesive sheet for displays.
請求項１記載のディスプレイ用接着シート。 The optical transparent adhesive (OCA) film is in a B-stage state,
The display adhesive sheet according to claim 1 .
紫外線（ＵＶ）硬化前の６０℃及び１Ｈｚでのモデュラス（ｍｏｄｕｌｕｓ）が１０４Ｐａ～１０５Ｐａであり、
紫外線（ＵＶ）硬化後の６０℃及び１Ｈｚでのモデュラス（ｍｏｄｕｌｕｓ）が１０５Ｐａ～１０６Ｐａであることを特徴とする，
請求項１記載のディスプレイ用接着シート。 The optical transparent adhesive (OCA) film is
The modulus at 60° C. and 1 Hz before ultraviolet (UV) curing is 10 4 Pa to 10 5 Pa,
characterized by a modulus of 10 5 Pa to 10 6 Pa at 60 ° C. and 1 Hz after ultraviolet (UV) curing,
The display adhesive sheet according to claim 1 .
請求項１記載のディスプレイ用接着シート。 The adhesive composition contains 0.1 to 5.0 parts by weight of the UV initiator and 1.0 to 5.0 parts by weight of the post-curing crosslinking agent with respect to 100 parts by weight of the acrylic resin. characterized by
The display adhesive sheet according to claim 1 .
請求項１記載のディスプレイ用接着シート。 The UV initiator is a mixture of 0.01 to 0.2 parts by weight of a long wavelength UV initiator and 0.2 to 1.0 parts by weight of a short wavelength UV initiator,
The display adhesive sheet according to claim 1 .
請求項１記載のディスプレイ用接着シート。 Further comprising a first release film and a second release film disposed on both sides of the optical transparent adhesive (OCA) film,
The display adhesive sheet according to claim 1 .
第１離型フィルム上に、前記接着組成物を塗布した後、その上に第２離型フィルムを配置して、接着シート構造体を形成するステップと、
前記形成された接着シート構造体に青色ＬＥＤランプを照射して、仮硬化（ｐｒｅ－ｈａｒｄｅｎｉｎｇ）し、前記塗布された接着組成物をＢ－ステージ（Ｂ－ｓｔａｇｅ）状態の光学用透明接着（ＯＣＡ）フィルムで形成するステップと、を含み、
前記後硬化架橋剤は、ケイ皮酸ビニルを含むことを特徴とする、
ディスプレイ用接着シートの製造方法。 mixing an acrylic resin, a UV initiator, and a post-curing crosslinker to obtain an adhesive composition;
applying the adhesive composition on the first release film and then placing the second release film thereon to form an adhesive sheet structure;
The formed adhesive sheet structure is irradiated with a blue LED lamp for pre-hardening, and the applied adhesive composition is B-stage state optical transparent adhesive (OCA). ) forming with a film;
The post-curing cross-linking agent comprises vinyl cinnamate,
A method for producing an adhesive sheet for a display.
紫外線（ＵＶ）硬化前の６０℃及び１Ｈｚでのモデュラス（ｍｏｄｕｌｕｓ）が１０４Ｐａ～１０５Ｐａであり、
紫外線（ＵＶ）硬化後の６０℃及び１Ｈｚでのモデュラス（ｍｏｄｕｌｕｓ）が１０５Ｐａ～１０６Ｐａであることを特徴とする、
請求項７記載のディスプレイ用接着シートの製造方法。 The optical transparent adhesive (OCA) film is
The modulus at 60° C. and 1 Hz before ultraviolet (UV) curing is 10 4 Pa to 10 5 Pa,
characterized by a modulus of 10 5 Pa to 10 6 Pa at 60° C. and 1 Hz after ultraviolet (UV) curing,
The method for producing the adhesive sheet for display according to claim 7.
請求項７記載のディスプレイ用接着シートの製造方法。 The adhesive composition contains 0.1 to 5.0 parts by weight of the UV initiator and 1.0 to 5.0 parts by weight of the post-curing crosslinking agent with respect to 100 parts by weight of the acrylic resin. characterized by
The method for producing the adhesive sheet for display according to claim 7.
一以上のディスプレイ部材上に、前記光学用透明接着（ＯＣＡ）フィルムを配置するステップと、
前記光学用透明接着（ＯＣＡ）フィルムに紫外線（ＵＶ）を照射して、後硬化するステップと、を含む、
ディスプレイパネル（ｐａｎｅｌ）の製造方法。 extracting the optical transparent adhesive (OCA) film from the display adhesive sheet according to any one of claims 1 to 7;
placing the optical clear adhesive (OCA) film on one or more display members;
irradiating the optical clear adhesive (OCA) film with ultraviolet (UV) light for post-curing;
A method of manufacturing a display panel.
請求項１０記載のディスプレイパネルの製造方法。 The one or more display members are characterized by having steps or bends,
11. The method of manufacturing a display panel according to claim 10.
請求項１１記載のディスプレイパネルの製造方法。 The optical adhesive film is adhered in accordance with the steps or bends by the post-curing step,
The manufacturing method of the display panel according to claim 11.
A display comprising the adhesive sheet for a display according to any one of claims 1 to 7.
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