CN112029436A - Adhesive sheet, adhesive kit, and laminate - Google Patents
Adhesive sheet, adhesive kit, and laminate Download PDFInfo
- Publication number
- CN112029436A CN112029436A CN202010474252.3A CN202010474252A CN112029436A CN 112029436 A CN112029436 A CN 112029436A CN 202010474252 A CN202010474252 A CN 202010474252A CN 112029436 A CN112029436 A CN 112029436A
- Authority
- CN
- China
- Prior art keywords
- adhesive layer
- pressure
- substrate
- sensitive adhesive
- less
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 239000000853 adhesive Substances 0.000 title claims abstract description 119
- 230000001070 adhesive effect Effects 0.000 title claims abstract description 119
- 239000004820 Pressure-sensitive adhesive Substances 0.000 claims abstract description 165
- 239000010410 layer Substances 0.000 claims abstract description 158
- 239000012790 adhesive layer Substances 0.000 claims abstract description 144
- 239000000758 substrate Substances 0.000 claims abstract description 120
- 238000002834 transmittance Methods 0.000 claims abstract description 91
- 239000000203 mixture Substances 0.000 claims description 49
- 239000000463 material Substances 0.000 claims description 25
- 229920000058 polyacrylate Polymers 0.000 claims description 20
- 239000000049 pigment Substances 0.000 claims description 7
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 58
- 239000000178 monomer Substances 0.000 description 54
- 238000002156 mixing Methods 0.000 description 49
- 230000003287 optical effect Effects 0.000 description 42
- 229920000642 polymer Polymers 0.000 description 37
- 239000006103 coloring component Substances 0.000 description 34
- 229920002554 vinyl polymer Polymers 0.000 description 34
- 239000003431 cross linking reagent Substances 0.000 description 33
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 30
- 229910052751 metal Inorganic materials 0.000 description 29
- 239000002184 metal Substances 0.000 description 29
- -1 2-ethylhexyl Chemical group 0.000 description 27
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 25
- 238000001035 drying Methods 0.000 description 19
- 238000000034 method Methods 0.000 description 17
- 239000000126 substance Substances 0.000 description 15
- 238000004132 cross linking Methods 0.000 description 14
- 239000000975 dye Substances 0.000 description 14
- 229920005989 resin Polymers 0.000 description 14
- 239000011347 resin Substances 0.000 description 14
- 239000002904 solvent Substances 0.000 description 14
- 239000007787 solid Substances 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 11
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 9
- 230000032683 aging Effects 0.000 description 9
- 125000000217 alkyl group Chemical group 0.000 description 9
- 239000003054 catalyst Substances 0.000 description 9
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 9
- 239000012948 isocyanate Substances 0.000 description 9
- 150000002513 isocyanates Chemical class 0.000 description 9
- 239000003505 polymerization initiator Substances 0.000 description 9
- 230000003014 reinforcing effect Effects 0.000 description 9
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 7
- 238000000576 coating method Methods 0.000 description 7
- 125000000524 functional group Chemical group 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 229920000139 polyethylene terephthalate Polymers 0.000 description 7
- 239000005020 polyethylene terephthalate Substances 0.000 description 7
- 229920001296 polysiloxane Polymers 0.000 description 7
- FKTHNVSLHLHISI-UHFFFAOYSA-N 1,2-bis(isocyanatomethyl)benzene Chemical compound O=C=NCC1=CC=CC=C1CN=C=O FKTHNVSLHLHISI-UHFFFAOYSA-N 0.000 description 6
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 6
- WHNWPMSKXPGLAX-UHFFFAOYSA-N N-Vinyl-2-pyrrolidone Chemical compound C=CN1CCCC1=O WHNWPMSKXPGLAX-UHFFFAOYSA-N 0.000 description 6
- 239000000654 additive Substances 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 6
- 238000011156 evaluation Methods 0.000 description 6
- 239000011521 glass Substances 0.000 description 6
- RTTZISZSHSCFRH-UHFFFAOYSA-N 1,3-bis(isocyanatomethyl)benzene Chemical compound O=C=NCC1=CC=CC(CN=C=O)=C1 RTTZISZSHSCFRH-UHFFFAOYSA-N 0.000 description 5
- GOXQRTZXKQZDDN-UHFFFAOYSA-N 2-Ethylhexyl acrylate Chemical compound CCCCC(CC)COC(=O)C=C GOXQRTZXKQZDDN-UHFFFAOYSA-N 0.000 description 5
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 description 5
- 239000002313 adhesive film Substances 0.000 description 5
- 239000000987 azo dye Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 5
- 229920001225 polyester resin Polymers 0.000 description 5
- 239000004645 polyester resin Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 4
- 239000002985 plastic film Substances 0.000 description 4
- 229920001721 polyimide Polymers 0.000 description 4
- 239000009719 polyimide resin Substances 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 238000003786 synthesis reaction Methods 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 125000006539 C12 alkyl 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 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 3
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 3
- 239000007869 azo polymerization initiator Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000003086 colorant Substances 0.000 description 3
- 238000007865 diluting Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 125000003055 glycidyl group Chemical group C(C1CO1)* 0.000 description 3
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 3
- 150000002978 peroxides Chemical class 0.000 description 3
- 239000001007 phthalocyanine dye Substances 0.000 description 3
- 229920006255 plastic film Polymers 0.000 description 3
- 238000006116 polymerization reaction Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- KANZWHBYRHQMKZ-UHFFFAOYSA-N 2-ethenylpyrazine Chemical compound C=CC1=CN=CC=N1 KANZWHBYRHQMKZ-UHFFFAOYSA-N 0.000 description 2
- 125000000954 2-hydroxyethyl group Chemical group [H]C([*])([H])C([H])([H])O[H] 0.000 description 2
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 2
- 229920000178 Acrylic resin Polymers 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 2
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 2
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical group OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- KAESVJOAVNADME-UHFFFAOYSA-N Pyrrole Chemical compound C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 description 2
- 239000006087 Silane Coupling Agent Substances 0.000 description 2
- 239000004902 Softening Agent Substances 0.000 description 2
- QYKIQEUNHZKYBP-UHFFFAOYSA-N Vinyl ether Chemical compound C=COC=C QYKIQEUNHZKYBP-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- 239000002216 antistatic agent Substances 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 125000004093 cyano group Chemical group *C#N 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 229920002457 flexible plastic Polymers 0.000 description 2
- 238000005227 gel permeation chromatography Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Chemical compound [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000004014 plasticizer Substances 0.000 description 2
- 229920001643 poly(ether ketone) Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 230000000379 polymerizing effect Effects 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 125000000020 sulfo group Chemical group O=S(=O)([*])O[H] 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- VXUYXOFXAQZZMF-UHFFFAOYSA-N titanium(IV) isopropoxide Chemical compound CC(C)O[Ti](OC(C)C)(OC(C)C)OC(C)C VXUYXOFXAQZZMF-UHFFFAOYSA-N 0.000 description 2
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 2
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 2
- 229920001567 vinyl ester resin Polymers 0.000 description 2
- JYEUMXHLPRZUAT-UHFFFAOYSA-N 1,2,3-triazine Chemical compound C1=CN=NN=C1 JYEUMXHLPRZUAT-UHFFFAOYSA-N 0.000 description 1
- OVBFMUAFNIIQAL-UHFFFAOYSA-N 1,4-diisocyanatobutane Chemical compound O=C=NCCCCN=C=O OVBFMUAFNIIQAL-UHFFFAOYSA-N 0.000 description 1
- NVZWEEGUWXZOKI-UHFFFAOYSA-N 1-ethenyl-2-methylbenzene Chemical compound CC1=CC=CC=C1C=C NVZWEEGUWXZOKI-UHFFFAOYSA-N 0.000 description 1
- JWYVGKFDLWWQJX-UHFFFAOYSA-N 1-ethenylazepan-2-one Chemical compound C=CN1CCCCCC1=O JWYVGKFDLWWQJX-UHFFFAOYSA-N 0.000 description 1
- OSSNTDFYBPYIEC-UHFFFAOYSA-N 1-ethenylimidazole Chemical compound C=CN1C=CN=C1 OSSNTDFYBPYIEC-UHFFFAOYSA-N 0.000 description 1
- DCRYNQTXGUTACA-UHFFFAOYSA-N 1-ethenylpiperazine Chemical compound C=CN1CCNCC1 DCRYNQTXGUTACA-UHFFFAOYSA-N 0.000 description 1
- PBGPBHYPCGDFEZ-UHFFFAOYSA-N 1-ethenylpiperidin-2-one Chemical compound C=CN1CCCCC1=O PBGPBHYPCGDFEZ-UHFFFAOYSA-N 0.000 description 1
- XLPJNCYCZORXHG-UHFFFAOYSA-N 1-morpholin-4-ylprop-2-en-1-one Chemical compound C=CC(=O)N1CCOCC1 XLPJNCYCZORXHG-UHFFFAOYSA-N 0.000 description 1
- BFYSJBXFEVRVII-UHFFFAOYSA-N 1-prop-1-enylpyrrolidin-2-one Chemical compound CC=CN1CCCC1=O BFYSJBXFEVRVII-UHFFFAOYSA-N 0.000 description 1
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 description 1
- IMSODMZESSGVBE-UHFFFAOYSA-N 2-Oxazoline Chemical compound C1CN=CO1 IMSODMZESSGVBE-UHFFFAOYSA-N 0.000 description 1
- 125000000143 2-carboxyethyl group Chemical group [H]OC(=O)C([H])([H])C([H])([H])* 0.000 description 1
- MZNSQRLUUXWLSB-UHFFFAOYSA-N 2-ethenyl-1h-pyrrole Chemical compound C=CC1=CC=CN1 MZNSQRLUUXWLSB-UHFFFAOYSA-N 0.000 description 1
- ZDHWTWWXCXEGIC-UHFFFAOYSA-N 2-ethenylpyrimidine Chemical compound C=CC1=NC=CC=N1 ZDHWTWWXCXEGIC-UHFFFAOYSA-N 0.000 description 1
- RCEJCSULJQNRQQ-UHFFFAOYSA-N 2-methylbutanenitrile Chemical compound CCC(C)C#N RCEJCSULJQNRQQ-UHFFFAOYSA-N 0.000 description 1
- AGBXYHCHUYARJY-UHFFFAOYSA-N 2-phenylethenesulfonic acid Chemical compound OS(=O)(=O)C=CC1=CC=CC=C1 AGBXYHCHUYARJY-UHFFFAOYSA-N 0.000 description 1
- KGIGUEBEKRSTEW-UHFFFAOYSA-N 2-vinylpyridine Chemical compound C=CC1=CC=CC=N1 KGIGUEBEKRSTEW-UHFFFAOYSA-N 0.000 description 1
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- OFNISBHGPNMTMS-UHFFFAOYSA-N 3-methylideneoxolane-2,5-dione Chemical compound C=C1CC(=O)OC1=O OFNISBHGPNMTMS-UHFFFAOYSA-N 0.000 description 1
- JLBJTVDPSNHSKJ-UHFFFAOYSA-N 4-Methylstyrene Chemical compound CC1=CC=C(C=C)C=C1 JLBJTVDPSNHSKJ-UHFFFAOYSA-N 0.000 description 1
- CFZDMXAOSDDDRT-UHFFFAOYSA-N 4-ethenylmorpholine Chemical compound C=CN1CCOCC1 CFZDMXAOSDDDRT-UHFFFAOYSA-N 0.000 description 1
- SXIFAEWFOJETOA-UHFFFAOYSA-N 4-hydroxy-butyl Chemical group [CH2]CCCO SXIFAEWFOJETOA-UHFFFAOYSA-N 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 239000005995 Aluminium silicate Substances 0.000 description 1
- NOWKCMXCCJGMRR-UHFFFAOYSA-N Aziridine Chemical compound C1CN1 NOWKCMXCCJGMRR-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 239000005058 Isophorone diisocyanate Substances 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
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- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
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- XQBCVRSTVUHIGH-UHFFFAOYSA-L [dodecanoyloxy(dioctyl)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCCCCCC)(CCCCCCCC)OC(=O)CCCCCCCCCCC XQBCVRSTVUHIGH-UHFFFAOYSA-L 0.000 description 1
- KJVBXWVJBJIKCU-UHFFFAOYSA-N [hydroxy(2-hydroxyethoxy)phosphoryl] prop-2-enoate Chemical compound OCCOP(O)(=O)OC(=O)C=C KJVBXWVJBJIKCU-UHFFFAOYSA-N 0.000 description 1
- 239000000999 acridine dye Substances 0.000 description 1
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- 125000001204 arachidyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
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- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
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- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 239000001506 calcium phosphate Substances 0.000 description 1
- 229910000389 calcium phosphate Inorganic materials 0.000 description 1
- 235000011010 calcium phosphates Nutrition 0.000 description 1
- 150000001718 carbodiimides Chemical class 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
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- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
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- LDHQCZJRKDOVOX-NSCUHMNNSA-N crotonic acid Chemical compound C\C=C\C(O)=O LDHQCZJRKDOVOX-NSCUHMNNSA-N 0.000 description 1
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- 125000002704 decyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 239000012933 diacyl peroxide Substances 0.000 description 1
- 238000007607 die coating method Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- CZZYITDELCSZES-UHFFFAOYSA-N diphenylmethane Chemical compound C=1C=CC=CC=1CC1=CC=CC=C1 CZZYITDELCSZES-UHFFFAOYSA-N 0.000 description 1
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- 125000001400 nonyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
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- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
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- IZMJMCDDWKSTTK-UHFFFAOYSA-N quinoline yellow Chemical compound C1=CC=CC2=NC(C3C(C4=CC=CC=C4C3=O)=O)=CC=C21 IZMJMCDDWKSTTK-UHFFFAOYSA-N 0.000 description 1
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- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
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- SEEPANYCNGTZFQ-UHFFFAOYSA-N sulfadiazine Chemical compound C1=CC(N)=CC=C1S(=O)(=O)NC1=NC=CC=N1 SEEPANYCNGTZFQ-UHFFFAOYSA-N 0.000 description 1
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- AAAQKTZKLRYKHR-UHFFFAOYSA-N triphenylmethane Chemical compound C1=CC=CC=C1C(C=1C=CC=CC=1)C1=CC=CC=C1 AAAQKTZKLRYKHR-UHFFFAOYSA-N 0.000 description 1
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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
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/02—Physical, chemical or physicochemical properties
- B32B7/023—Optical properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- C—CHEMISTRY; METALLURGY
- 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
- C09J139/00—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 a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen; Adhesives based on derivatives of such polymers
- C09J139/04—Homopolymers or copolymers of monomers containing heterocyclic rings having nitrogen as ring member
- C09J139/06—Homopolymers or copolymers of N-vinyl-pyrrolidones
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
- C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/385—Acrylic polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/412—Transparent
-
- 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
- C09J2203/326—Applications of adhesives in processes or use of adhesives in the form of films or foils for bonding electronic components such as wafers, chips or semiconductors
-
- 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
- C09J2301/20—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself
- C09J2301/208—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself the adhesive layer being constituted by at least two or more adjacent or superposed adhesive layers, e.g. multilayer adhesive
-
- 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
- C09J2433/00—Presence of (meth)acrylic polymer
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Adhesive Tapes (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Laminated Bodies (AREA)
Abstract
The invention relates to a pressure-sensitive adhesive sheet, a pressure-sensitive adhesive kit, and a laminate. The invention provides an adhesive sheet and an adhesive kit which are excellent in inspectability and antireflection, and a laminate obtained using the adhesive sheet and the adhesive kit. The adhesive sheet (1) comprises a first adhesive layer (2), a substrate (3), and a second adhesive layer (4) in this order. The average transmittance in the range of 300nm to 700nm is 30% or less when the adhesive layer comprises the first adhesive layer (2), the substrate (3), and the second adhesive layer (4) in this order. The average transmittance of the first pressure-sensitive adhesive layer (2) in the range of 300nm to 700nm is 40% or more. The average transmittance of the second pressure-sensitive adhesive layer (4) in the range of 300nm to 700nm is 40% or more. The average transmittance of the substrate (3) at 550nm is 40% or more.
Description
Technical Field
The present invention relates to an adhesive sheet, an adhesive kit, and a laminate, and more particularly, to an adhesive sheet and an adhesive kit for attachment to various devices and the like, and a laminate obtained using the adhesive sheet and the adhesive kit.
Background
It is known that an adhesive film is temporarily attached to the surface of various devices such as electronic devices before the steps of assembling, processing, transporting, and the like are performed to protect the surface and impart impact resistance.
As such an adhesive film, a stress dispersion film including a laminate of a plastic film and an adhesive layer is known (for example, see patent document 1).
In addition, in order to reinforce the adherend, the stress dispersion film of patent document 1 remains as it is on the adherend.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2017-132977
Disclosure of Invention
Problems to be solved by the invention
On the other hand, such an adhesive film is sometimes used for reinforcement of an optical device.
Specifically, an adhesive film is attached to one surface of the optical device.
In such a case, in view of imparting rigidity, it is considered to further dispose an adhesive layer on one surface of the adhesive film and dispose a hard substrate (metal sheet) such as a SUS substrate through the adhesive layer.
However, since the surface of the hard substrate (metal sheet) has luster, light incident from the optical device side is sometimes reflected by the hard substrate (metal sheet).
In order to prevent such reflection, it has been studied to reduce the average transmittance by blending a pigment in the adhesive layer, but when the average transmittance of the adhesive layer is reduced, there is a problem that the inspectability is reduced because the coating cannot be confirmed even if foreign matter or the like is mixed in the adhesive layer and the hard substrate (metal sheet) is bonded.
The invention provides an adhesive sheet and an adhesive kit which are excellent in inspectability and antireflection, and a laminate obtained using the adhesive sheet and the adhesive kit.
Means for solving the problems
The present invention [1] is a pressure-sensitive adhesive sheet comprising a first pressure-sensitive adhesive layer, a substrate, and a second pressure-sensitive adhesive layer in this order, wherein the average transmittance in the range of 300nm to 700nm is 30% or less, the average transmittance in the range of 300nm to 700nm of the first pressure-sensitive adhesive layer is 40% or more, the average transmittance in the range of 300nm to 700nm of the second pressure-sensitive adhesive layer is 40% or more, and the average transmittance at 550nm of the substrate is 40% or more.
The invention [2] is the adhesive sheet according to [1], wherein at least two layers of the first adhesive layer, the substrate, and the second adhesive layer satisfy one of the following conditions (1) to (3), and at least two layers satisfying the condition satisfy mutually different conditions,
(1) an average transmittance in the range of 430nm to 460nm of 90% or less,
(2) an average transmittance of 90% or less in the range of 530nm to 560nm,
(3) an average transmittance in the range of 660nm to 690nm is 90% or less.
The invention [3] comprises the adhesive sheet according to [1] or [2], wherein the haze value of the first adhesive layer is 3% or less, the haze value of the substrate is 10% or less, and the haze value of the second adhesive layer is 3% or less.
The invention [4] includes the adhesive sheet according to any one of the above [1] to [3], wherein the first adhesive layer contains an acrylic polymer, and the second adhesive layer contains an acrylic polymer.
The invention [5] includes the adhesive sheet according to any one of the above [1] to [4], wherein the first adhesive layer contains a dye or a pigment, and the second adhesive layer contains a dye or a pigment.
The invention [6] is a bonding kit comprising a first pressure-sensitive adhesive layer, a substrate, and a second pressure-sensitive adhesive layer as at least two members independent of each other, wherein the average transmittance in the range of 300nm to 700nm is 30% or less when the first pressure-sensitive adhesive layer, the substrate, and the second pressure-sensitive adhesive layer are provided in this order,
the first pressure-sensitive adhesive layer has an average transmittance of 40% or more in a range of 300nm to 700nm, the second pressure-sensitive adhesive layer has an average transmittance of 40% or more in a range of 300nm to 700nm, and the substrate has an average transmittance of 40% or more at 550 nm.
The present invention [7] is a laminate comprising a first adherend, a first pressure-sensitive adhesive layer, a substrate, a second pressure-sensitive adhesive layer, and a second adherend in this order, wherein the average transmittance in the range of 300nm to 700nm is 30% or less, the average transmittance in the range of 300nm to 700nm of the first pressure-sensitive adhesive layer is 40% or more, the average transmittance in the range of 300nm to 700nm of the second pressure-sensitive adhesive layer is 40% or more, and the average transmittance at 550nm of the substrate is 40% or more, when the laminate comprises the first pressure-sensitive adhesive layer, the substrate, and the second pressure-sensitive adhesive layer in this order.
Effects of the invention
The adhesive sheet, adhesive kit, and laminate of the present invention have an average transmittance of 30% or less in the range of 300nm to 700nm when the adhesive sheet, adhesive kit, and laminate have the first adhesive layer, substrate, and second adhesive layer in this order.
Therefore, even when the pressure-sensitive adhesive sheet and the pressure-sensitive adhesive kit are bonded to a substrate having a glossy surface, the pressure-sensitive adhesive sheet and the pressure-sensitive adhesive kit have excellent antireflection properties, and in the laminate, even when the first adherend or the second adherend is a substrate having a glossy surface, the pressure-sensitive adhesive sheet and the pressure-sensitive adhesive kit have excellent antireflection properties.
In addition, in the adhesive sheet and the adhesive kit, the average transmittance of the first adhesive layer and the second adhesive layer in the range of 300nm or more and 700nm or less is 40% or more, and the average transmittance of the substrate at 550nm is 40% or more. When the first pressure-sensitive adhesive layer is bonded to the substrate and when the second pressure-sensitive adhesive layer is bonded to the substrate, the mixing of foreign matter and the like can be easily confirmed, and the inspectability is excellent.
In addition, the obtained laminate is inhibited from mixing foreign substances and the like by the adhesive sheet and the adhesive kit.
Drawings
Fig. 1 is a schematic view showing one embodiment of the adhesive sheet of the present invention.
Fig. 2 is a schematic view showing an embodiment of the method for producing a psa sheet according to the present invention, wherein fig. 2A shows the 1 st step of preparing a first psa layer, fig. 2B shows the 2 nd step of preparing a second psa layer, fig. 2C shows the 3 rd step of preparing a substrate 3, fig. 2D shows the 4 th step of disposing a first psa layer on the other surface (lower surface) of the substrate 3, and fig. 2E shows the 5 th step of disposing a second psa layer on one surface (upper surface) of the substrate 3.
Fig. 3 is a schematic view of one embodiment of the bonding kit of the present invention, fig. 3A shows a bonding kit having a first adhesive layer, a substrate, and a second adhesive layer as three mutually independent members, fig. 3B shows a bonding kit having a first adhesive layer with a substrate and a second adhesive layer with a substrate in this order as two mutually independent members, and fig. 3C shows a bonding kit having a first adhesive layer and a second adhesive layer with a substrate in this order as two mutually independent members.
Fig. 4 is a schematic view showing an embodiment of a method for reinforcing an optical device using the adhesive sheet of the present invention, fig. 4A shows a 6 th step of preparing the adhesive sheet, fig. 4B shows a 7 th step of attaching the adhesive sheet to the optical device so that the optical device is in contact with the second adhesive layer, and fig. 4C shows an 8 th step of attaching the adhesive sheet to the metal plate so that the metal plate is in contact with the first adhesive layer.
Fig. 5 is a schematic view showing an embodiment of a method for reinforcing an optical device using the adhesive kit of the present invention, fig. 5A shows a 9 th step of preparing the adhesive kit, fig. 5B shows a 10 th step of attaching the second adhesive layer with the substrate to the optical device so that the optical device is in contact with the second adhesive layer, fig. 5C shows an 11 th step of attaching the first adhesive layer to the metal plate so that the metal plate is in contact with the first adhesive layer, and fig. 5D shows a 12 th step of attaching the first adhesive layer to the substrate so that the first adhesive layer is in contact with the substrate.
Reference numerals
1: adhesive sheet
2: first adhesive layer
3: base material
4: second adhesive layer
5: metal plate
6: optical device
8: laminated body
Detailed Description
An embodiment of the pressure-sensitive adhesive sheet of the present invention will be described with reference to fig. 1.
1. Adhesive sheet
As shown in fig. 1, this adhesive sheet 1 has a film shape (including a sheet shape) having a predetermined thickness, extends in a direction (planar direction) orthogonal to the thickness direction, and has a flat upper surface and a flat lower surface.
The adhesive sheet 1 has a first adhesive layer 2, a substrate 3, and a second adhesive layer 4 in this order. Specifically, the adhesive sheet 1 includes a first adhesive layer 2, a substrate 3 disposed on the upper surface of the first adhesive layer 2, and a second adhesive layer 4 disposed on the upper surface of the substrate 3.
Hereinafter, each layer will be described in detail.
2. First adhesive layer
The first adhesive layer 2 is a base layer of the adhesive sheet 1. The first adhesive layer 2 is a pressure-sensitive adhesive layer for adhering the adhesive sheet 1 to a metal plate 5 (described later). In addition, the first adhesive layer 2 has a film shape extending in the plane direction, and has a flat upper surface and a flat lower surface.
The first adhesive layer 2 comprises a first adhesive composition comprising a polymer and a coloring component.
Examples of the polymer include: acrylic polymers, silicone polymers, polyurethane polymers, rubber polymers, and the like, and from the viewpoint of controlling optical transparency, adhesiveness, and storage elastic modulus, acrylic polymers are exemplified.
The acrylic polymer is obtained by polymerizing a monomer component containing an alkyl (meth) acrylate as a main component.
Alkyl (meth) acrylates are acrylates and/or methacrylates, and examples include: methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, isopropyl (meth) acrylate, isobutyl (meth) acrylate, sec-butyl (meth) acrylate, tert-butyl (meth) acrylate, pentyl (meth) acrylate, isopentyl (meth) acrylate, neopentyl (meth) acrylate, hexyl (meth) acrylate, heptyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, octyl (meth) acrylate, isooctyl (meth) acrylate, nonyl (meth) acrylate, isononyl (meth) acrylate, decyl (meth) acrylate, isodecyl (meth) acrylate, undecyl (meth) acrylate, dodecyl (meth) acrylate, isotridecyl (meth) acrylate, tetradecyl (meth) acrylate, dodecyl (meth) acrylate, and the like, Linear or branched C1 to C20 alkyl (meth) acrylates such as isotetradecyl (meth) acrylate, pentadecyl (meth) acrylate, hexadecyl (meth) acrylate, heptadecyl (meth) acrylate, octadecyl (meth) acrylate, isostearyl (meth) acrylate, nonadecyl (meth) acrylate, and eicosyl (meth) acrylate, and preferred examples thereof include: methyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, more preferably exemplified are: methyl methacrylate, 2-ethylhexyl acrylate.
The alkyl (meth) acrylate may be used alone or in combination of two or more.
As the alkyl (meth) acrylate, from the viewpoint of adjusting the glass transition temperature and the shear storage elastic modulus G', a combination of methyl methacrylate and a C4-C12 alkyl (meth) acrylate is preferably used, and a combination of methyl methacrylate and 2-ethylhexyl acrylate is more preferably used.
When methyl methacrylate and a C4 to C12 alkyl (meth) acrylate are used in combination as the alkyl (meth) acrylate, the mixing ratio of methyl methacrylate is, for example, 5 parts by mass or more and 20 parts by mass or less, and the mixing ratio of a C4 to C12 alkyl (meth) acrylate is, for example, 80 parts by mass or more and 95 parts by mass or less, based on 100 parts by mass of the total amount of methyl methacrylate and a C4 to C12 alkyl (meth) acrylate.
The blending ratio of the alkyl (meth) acrylate to the monomer component is, for example, 50 mass% or more, preferably 60 mass% or more, and, for example, 80 mass% or less.
The monomer component preferably contains a functional group-containing vinyl monomer copolymerizable with the alkyl (meth) acrylate.
Examples of the functional group-containing vinyl monomer include: hydroxyl group-containing vinyl monomers, carboxyl group-containing vinyl monomers, nitrogen-containing vinyl monomers, cyano group-containing vinyl monomers, glycidyl group-containing vinyl monomers, sulfo group-containing vinyl monomers, phosphoric acid group-containing vinyl monomers, aromatic vinyl monomers, vinyl ester monomers, vinyl ether monomers, and the like.
Examples of the hydroxyl group-containing vinyl monomer include: 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, 6-hydroxyhexyl (meth) acrylate, 8-hydroxyoctyl (meth) acrylate, 10-hydroxydecyl (meth) acrylate, 12-hydroxylauryl (meth) acrylate, 4- (hydroxymethyl) cyclohexyl) methyl (meth) acrylate, etc., preferably 2-hydroxyethyl (meth) acrylate, more preferably 2-hydroxyethyl acrylate.
Examples of the carboxyl group-containing vinyl monomer include: (meth) acrylic acid, 2-carboxyethyl (meth) acrylate, carboxypentyl (meth) acrylate, itaconic acid, maleic acid, fumaric acid, crotonic acid, and the like.
Examples of the carboxyl group-containing vinyl monomer include: anhydride group-containing monomers such as maleic anhydride and itaconic anhydride.
Examples of the nitrogen-containing vinyl monomer include: n-vinylpyrrolidone, methylvinylpyrrolidone, vinylpyridine, vinylpiperidone, vinylpyrimidine, vinylpiperazine, vinylpyrazine, vinylpyrrole, vinylimidazole, vinyl
Examples of the compound include azole, vinyl morpholine, N-acryloyl morpholine, N-vinyl carboxylic acid amides, and N-vinyl caprolactam, and N-vinyl pyrrolidone is preferably used.
Examples of the cyano group-containing vinyl monomer include: (meth) acrylonitrile, and the like.
Examples of the glycidyl group-containing vinyl monomer include: glycidyl (meth) acrylate, and the like.
Examples of the sulfo group-containing vinyl monomer include: styrene sulfonic acid, allyl sulfonic acid, and the like.
Examples of the phosphoric acid group-containing vinyl monomer include: 2-hydroxyethyl acryloyl phosphate, and the like.
Examples of the aromatic vinyl monomer include: styrene, p-methylstyrene, o-methylstyrene, alpha-methylstyrene, etc.
Examples of the vinyl ester monomer include: vinyl acetate, vinyl propionate, and the like.
Examples of the vinyl ether monomer include: methyl vinyl ether, and the like.
The functional group-containing vinyl monomer may be used alone or in combination of two or more. When a crosslinking agent (described later) is blended, a hydroxyl group-containing vinyl monomer and a carboxyl group-containing vinyl monomer are preferably used, a hydroxyl group-containing vinyl monomer is more preferably used, and a nitrogen-containing vinyl monomer is more preferably used, and a hydroxyl group-containing vinyl monomer and a nitrogen-containing vinyl monomer are more preferably used in combination, from the viewpoint of introducing a crosslinked structure into a polymer.
In the case of using the hydroxyl group-containing vinyl monomer and the nitrogen-containing vinyl monomer in combination, the compounding ratio of the hydroxyl group-containing vinyl monomer is, for example, 40 parts by mass or more and, for example, 60 parts by mass or less, and the compounding ratio of the nitrogen-containing vinyl monomer is, for example, 40 parts by mass or more and, for example, 60 parts by mass or less, with respect to 100 parts by mass of the total amount of the hydroxyl group-containing vinyl monomer and the nitrogen-containing vinyl monomer.
The blending ratio of the functional group-containing vinyl monomer to the monomer component is, for example, 5 mass% or more, preferably 10 mass% or more, more preferably 15 mass% or more, and, for example, 30 mass% or less.
The acrylic polymer is a polymer obtained by polymerizing the monomer components.
For polymerization of the monomer component, for example, an alkyl (meth) acrylate and, if necessary, a functional group-containing vinyl monomer are blended to prepare the monomer component, and the monomer component is prepared by a known polymerization method such as solution polymerization, bulk polymerization, or emulsion polymerization.
As the polymerization method, solution polymerization is preferably mentioned.
In the solution polymerization, for example, a monomer solution is prepared by mixing a monomer component and a polymerization initiator in a solvent, and then the monomer solution is heated.
Examples of the solvent include organic solvents.
As the organic solvent, there may be mentioned: aromatic hydrocarbon solvents such as toluene, benzene and xylene; ether solvents such as diethyl ether; ketone solvents such as acetone and methyl ethyl ketone; ester solvents such as ethyl acetate; for example, an amide solvent such as N, N-dimethylformamide is preferably an ester solvent, and more preferably ethyl acetate.
The solvent may be used alone or in combination of two or more.
The blending ratio of the solvent is, for example, 100 parts by mass or more, preferably 200 parts by mass or more, and the blending ratio of the solvent is, for example, 500 parts by mass or less, preferably 300 parts by mass or less, with respect to 100 parts by mass of the monomer component.
Examples of the polymerization initiator include: peroxide polymerization initiators, azo polymerization initiators, and the like.
Examples of the peroxide-based polymerization initiator include: organic peroxides such as peroxycarbonates, peroxyketones, peroxyketals, hydroperoxides, dialkyl peroxides, diacyl peroxides, and peroxyesters.
Examples of the azo polymerization initiator include: azo compounds such as 2,2 '-azobisisobutyronitrile, 2' -azobis (2-methylbutyronitrile), 2 '-azobis (2, 4-dimethylvaleronitrile), and dimethyl 2, 2' -azobisisobutyrate.
The polymerization initiator is preferably an azo polymerization initiator, and more preferably 2, 2' -azobisisobutyronitrile.
The polymerization initiator may be used alone or in combination of two or more.
The blending ratio of the polymerization initiator is, for example, 0.05 parts by mass or more, preferably 0.1 parts by mass or more, and the blending ratio of the polymerization initiator is, for example, 1 part by mass or less, preferably 0.5 parts by mass or less, with respect to 100 parts by mass of the monomer component.
The heating temperature is, for example, 50 ℃ or more and 80 ℃ or less, and the heating time is, for example, 1 hour or more and 8 hours or less.
Thereby, the monomer component is polymerized to obtain an acrylic polymer solution containing an acrylic polymer.
The solid content concentration of the acrylic polymer solution is, for example, 20 mass% or more, and is, for example, 80 mass% or less.
The weight average molecular weight of the acrylic polymer is, for example, 100000 or more, preferably 300000 or more, preferably 500000 or more, and the weight average molecular weight of the acrylic polymer is, for example, 5000000 or less, preferably 3000000 or less, and more preferably 2000000 or less.
The weight average molecular weight is a value calculated by measuring with GPC (gel permeation chromatography) and converting into polystyrene.
In the first pressure-sensitive adhesive composition, the blending ratio of the polymer is, for example, 95% by mass or more and, for example, 99.9% by mass or less with respect to the total amount of the polymer and the coloring component.
The coloring component is blended in order to adjust the average transmittance of the first pressure-sensitive adhesive layer 2 (described later) to a predetermined range.
Examples of the coloring component include: dyes, pigments, and the like.
Examples of the dye include: azo dyes, anthraquinone dyes, quinophthalone dyes, styrene dyes, diphenylmethane dyes, triphenylmethane dyes, azo dyes,
Oxazine dyes, triazine dyes, xanthene dyes, methane dyes, azomethine dyes, acridine dyes, diazine dyes, phthalocyanine dyes and the like, and preferably azo dyes, phthalocyanine dyes and the like are exemplified.
Further, as the dye, commercially available products can be used, and specifically, Valifast series (manufactured by Orient chemical industries, ltd.) and the like can be cited.
As the pigment, there can be mentioned: inorganic pigments such as zinc carbonate, zinc oxide, zinc sulfide, talc, kaolin, calcium carbonate, titanium oxide, silica, lithium fluoride, calcium fluoride, barium sulfate, alumina, zirconia, iron oxides, iron hydroxide, chromium oxide, and calcium phosphate; for example, organic pigments such as carbon black.
The coloring components may be used alone or in combination of two or more.
By blending such a coloring component, the average transmittance of the first pressure-sensitive adhesive layer 2 is adjusted to be within a predetermined range.
Specifically, in the first pressure-sensitive adhesive composition, when the coloring component is small, the average transmittance of the first pressure-sensitive adhesive layer 2 becomes large (in other words, the first pressure-sensitive adhesive layer 2 becomes more transparent), and when the first pressure-sensitive adhesive layer 2 and the substrate 3 are bonded in the 4 th step described later, mixing of foreign matters and the like can be easily confirmed, and the inspectability is excellent, while when the coloring component is large, as described in detail later, the average transmittance when the first pressure-sensitive adhesive layer 2, the substrate 3, and the second pressure-sensitive adhesive layer 4 are provided in this order becomes small, and therefore, the antireflection property is excellent.
That is, the blending ratio of the coloring component is appropriately selected in consideration of the balance between the inspectability and the antireflection property, and specifically, the blending ratio of the coloring component is, for example, 1.5 parts by mass or less, preferably 0.7 parts by mass or less, more preferably 0.4 parts by mass or less, and, for example, 0.1 parts by mass or more, relative to 100 parts by mass of the polymer, from the viewpoint of improving the inspectability.
On the other hand, from the viewpoint of improving the antireflection property, the blending ratio of the coloring component is, for example, 0.1 part by mass or more, preferably 0.4 part by mass or more, more preferably 0.7 part by mass or more, and for example, 1.5 parts by mass or less, relative to 100 parts by mass of the polymer.
Further, in order to prepare the first adhesive composition, the polymer (polymer solution in the case of preparing the polymer by solution polymerization) and the coloring component are blended and mixed in the above-described ratio.
From the viewpoint of introducing a crosslinked structure into the polymer, it is preferable to blend a crosslinking agent in the 1 st adhesive composition.
Examples of the crosslinking agent include: isocyanate crosslinking agent, epoxy crosslinking agent,
An oxazoline-based crosslinking agent, an aziridine-based crosslinking agent, a carbodiimide-based crosslinking agent, a metal chelate-based crosslinking agent, and the like, and preferably an isocyanate-based crosslinking agent is used.
Examples of the isocyanate-based crosslinking agent include: aliphatic diisocyanates such as butylene diisocyanate and hexamethylene diisocyanate; alicyclic diisocyanates such as cyclopentylene diisocyanate, cyclohexylene diisocyanate and isophorone diisocyanate; for example, aromatic diisocyanates such as 2, 4-tolylene diisocyanate, 4' -diphenylmethane diisocyanate, and xylylene diisocyanate.
Further, as the isocyanate-based crosslinking agent, there may be mentioned a derivative of the above-mentioned isocyanate (for example, isocyanurate-modified product, polyol-modified product, etc.).
As the isocyanate-based crosslinking agent, commercially available ones can be used, and examples thereof include: coronate L (trimethylolpropane adduct of tolylene diisocyanate, manufactured by tokyo co.), Coronate HL (trimethylolpropane adduct of hexamethylene diisocyanate, manufactured by tokyo co.), Coronate HX (isocyanurate form of hexamethylene diisocyanate), Takenate D110N (trimethylolpropane adduct of xylylene diisocyanate, manufactured by mitsui chemical) and the like.
The crosslinking agent may be used alone or in combination of two or more.
If a crosslinking agent is incorporated into the first adhesive composition, functional groups such as hydroxyl groups in the polymer react with the crosslinking agent to introduce a crosslinked structure into the polymer.
The equivalent weight of the functional group of the crosslinking agent is, for example, 50g/eq or more and, for example, 500g/eq or less.
In the first adhesive composition, the blending ratio of the crosslinking agent is, for example, 0.1 part by mass or more, preferably 0.5 part by mass or more, and more preferably 1.0 part by mass or more, and the blending ratio of the crosslinking agent is, for example, 10 parts by mass or less, preferably 5 parts by mass or less, and more preferably 4 parts by mass or less, with respect to 100 parts by mass of the polymer.
When the crosslinking agent is added to the first pressure-sensitive adhesive composition, a crosslinking catalyst may be added to accelerate the crosslinking reaction.
Examples of the crosslinking catalyst include: metal-based crosslinking catalysts such as tetra-n-butyl titanate, tetra-isopropyl titanate, iron acetylacetonate (ナーセム second iron), butyltin oxide, and dioctyltin dilaurate.
The crosslinking catalyst may be used alone or in combination of two or more.
The blending ratio of the crosslinking catalyst in the first adhesive composition is, for example, 0.001 parts by mass or more, preferably 0.01 parts by mass or more, and, for example, 0.05 parts by mass or less, relative to 100 parts by mass of the polymer.
The first pressure-sensitive adhesive composition may contain, if necessary, various additives such as a silane coupling agent, a tackifier, a plasticizer, a softening agent, a deterioration preventing agent, a filler, and an additive such as an ultraviolet absorber, an antioxidant, a surfactant, and an antistatic agent, which are contained in view of stabilization under fluorescent light or natural light, within a range not to impair the effects of the present invention.
Thereby obtaining a first adhesive composition.
The blending ratio of the polymer to the first pressure-sensitive adhesive composition is, for example, 70 mass% or more, preferably 90 mass% or more, and is, for example, 99 mass% or less.
The blending ratio of the coloring component to the first pressure-sensitive adhesive composition is, for example, 0.1 mass% or more, and is, for example, 3 mass% or less.
Then, the first pressure-sensitive adhesive layer 2 is formed from the first pressure-sensitive adhesive composition by a method described later.
As described above, the average transmittance of the first pressure-sensitive adhesive layer 2 is adjusted in consideration of the balance between inspectability and antireflection properties, specifically, the average transmittance of the first pressure-sensitive adhesive layer 2 in the range of 300nm or more and 700nm or less is adjusted to 40% or more, preferably 50% or more, more preferably 60% or more, still more preferably 70% or more, and further, for example, 75% or less from the viewpoint of improving inspectability, and the average transmittance of the first pressure-sensitive adhesive layer 2 in the range of 300nm or more and 700nm or less is adjusted to 40% or more, and further, for example, 75% or less, preferably 70% or less, more preferably 60% or less, still more preferably 50% or less from the viewpoint of improving antireflection properties.
The method for measuring the average transmittance is described in detail in examples described later (the same applies hereinafter).
The haze value of the first pressure-sensitive adhesive layer 2 is, for example, 3% or less, preferably 2% or less, and more preferably 1% or less.
When the haze value of the first pressure-sensitive adhesive layer 2 is not more than the upper limit, the transparency of the pressure-sensitive adhesive sheet 1 is excellent.
The method for measuring the haze value is described in detail in the examples described later (the same applies hereinafter).
The thickness of the first pressure-sensitive adhesive layer 2 is, for example, 5 μm or more, preferably 10 μm or more, more preferably 15 μm or more, and further preferably 20 μm or more from the viewpoint of adhesiveness, and the thickness of the first pressure-sensitive adhesive layer 2 is, for example, 300 μm or less, preferably 100 μm or less, more preferably 60 μm or less, and further preferably 40 μm or less from the viewpoint of handling property.
3. Base material
The substrate 3 is an intermediate layer of the adhesive sheet 1. The substrate 3 is a support layer (support material) for ensuring the mechanical strength of the adhesive sheet 1. The base material 3 is a reinforcing material for reinforcing an optical device 6 (described later). In addition, the base material 3 has a film shape extending in the plane direction, and has a flat plane and a flat lower surface.
The substrate 3 is a plastic film substrate including various engineering plastics, and such a plastic film substrate includes a flexible plastic material.
Examples of such plastic materials include: polyester resins such as polyethylene terephthalate (PET), polybutylene terephthalate, and polyethylene naphthalate; (meth) acrylic resins (acrylic resins and/or methacrylic resins) such as polymethacrylate; polyolefin resins such as polyethylene, polypropylene, and cycloolefin polymer (COP); such as polycarbonate resins; for example, polyether sulfone resins; such as polyarylate resins; such as melamine resins; such as polyamide resins; such as polyimide resins; such as cellulose resins; such as polystyrene resin; synthetic resins such as norbornene resins; polyether ketones such as polyether ether ketone and polyether ketone; such as polysulfone and the like. Preference is given to the following: polyimide resin, polyester resin.
The average transmittance of the base material 3 is selected in consideration of the balance between the inspectability and the antireflection property, as well as the average transmittance of the first pressure-sensitive adhesive layer 2, and specifically, the average transmittance of the base material 3 at 550nm or less is 40% or more, preferably 50% or more, more preferably 60% or more, further preferably 70% or more, particularly preferably 80% or more, and further, for example, 90% or less, from the viewpoint of improving the inspectability.
On the other hand, from the viewpoint of improving the antireflection property, the average transmittance of the substrate 3 at 550nm or less is 40% or more, and is, for example, 90% or less, preferably 80% or less, more preferably 70% or less, further preferably 60% or less, and particularly preferably 50% or less.
The haze value of the substrate 3 is, for example, 10% or less, preferably 9% or less, more preferably 8% or less, and further preferably 5% or less.
When the haze value of the substrate 3 is not more than the upper limit, the transparency of the adhesive sheet 1 is excellent.
The thickness of the substrate 3 is, for example, 4 μm or more, preferably 20 μm or more from the viewpoint of reinforcing the optical device 6 (described later), and the thickness of the substrate 3 is, for example, 500 μm or less, preferably 300 μm or less, more preferably 100 μm or less, and further preferably 60 μm or less from the viewpoint of flexibility and handling property.
4. Second adhesive layer
The second adhesive layer 4 is the top layer of the adhesive sheet 1. The second adhesive layer 4 is a pressure-sensitive adhesive layer for adhering the adhesive sheet 1 to an optical device 6 (described later). In addition, the second adhesive layer 4 has a film shape extending in the plane direction, and has a flat plane and a flat lower surface.
The second adhesive layer 4 contains a second adhesive composition containing the above-mentioned polymer and the above-mentioned coloring component.
From the viewpoint of controlling optical transparency, adhesiveness, and storage elastic modulus, an acrylic polymer is preferably used as the polymer.
Moreover, if the first adhesive layer 2 contains an acrylic polymer and the second adhesive layer 4 contains an acrylic polymer, the control of the optical transparency, adhesiveness, and storage elastic modulus is more excellent.
In the second pressure-sensitive adhesive composition, the blending ratio of the polymer is, for example, 95% by mass or more and, for example, 99.9% by mass or less with respect to the total amount of the polymer and the coloring component.
The blending ratio of the coloring component is appropriately selected in order to adjust the average transmittance of the second pressure-sensitive adhesive layer 4 within a predetermined range.
Specifically, as with the coloring component in the first pressure-sensitive adhesive layer 2 described above, when the coloring component is small in the second pressure-sensitive adhesive composition, the average transmittance of the second pressure-sensitive adhesive layer 4 becomes large (in other words, the second pressure-sensitive adhesive layer 4 becomes more transparent), and when the second pressure-sensitive adhesive layer 4 is bonded to the substrate 3 in the step 5 described later, mixing of foreign matter and the like can be easily confirmed, and the inspectability is excellent, and when the coloring component is large, the average transmittance when the first pressure-sensitive adhesive layer 2, the substrate 3, and the second pressure-sensitive adhesive layer 4 are provided in this order, as described later, becomes small in detail, and therefore, the antireflection property is excellent.
That is, the blending ratio of the coloring component is appropriately selected in consideration of the balance between the inspectability and the antireflection property, and specifically, the blending ratio of the coloring component is, for example, 1.5 parts by mass or less, preferably 0.7 parts by mass or less, more preferably 0.4 parts by mass or less, and, for example, 0.1 parts by mass or more, relative to 100 parts by mass of the polymer, from the viewpoint of improving the inspectability.
On the other hand, from the viewpoint of improving the antireflection property, the blending ratio of the coloring component is, for example, 0.1 part by mass or more, preferably 0.4 part by mass or more, more preferably 0.7 part by mass or more, and for example, 1.5 parts by mass or less, relative to 100 parts by mass of the polymer.
Further, in order to prepare the second adhesive composition, the polymer (polymer solution in the case of preparing the polymer by solution polymerization) and the coloring component are blended and mixed in the above-described ratio.
The second adhesive composition may contain the above-mentioned crosslinking agent and crosslinking catalyst as needed.
In the second adhesive composition, the blending ratio of the crosslinking agent is, for example, 0.1 part by mass or more, preferably 0.5 part by mass or more, more preferably 1.0 part by mass or more, and is, for example, 10 parts by mass or less, preferably 5 parts by mass or less, more preferably 4 parts by mass or less, with respect to 100 parts by mass of the polymer.
In the second adhesive composition, the blending ratio of the crosslinking catalyst is, for example, 0.001 parts by mass or more, preferably 0.01 parts by mass or more, and, for example, 0.05 parts by mass or less, relative to 100 parts by mass of the polymer.
The second pressure-sensitive adhesive composition may contain, if necessary, various additives such as a silane coupling agent, a tackifier, a plasticizer, a softening agent, a deterioration preventing agent, a filler, and an additive such as an ultraviolet absorber, an antioxidant, a surfactant, and an antistatic agent, which are contained in view of stabilization under fluorescent light or natural light, within a range not to impair the effects of the present invention.
Thereby obtaining a second adhesive composition.
The blending ratio of the polymer to the second adhesive composition is, for example, 70 mass% or more, preferably 90 mass% or more, and, for example, 99 mass% or less.
The blending ratio of the coloring component to the second pressure-sensitive adhesive composition is, for example, 0.1 mass% or more, and is, for example, 3 mass% or less.
Then, the second pressure-sensitive adhesive layer 4 is formed from the second pressure-sensitive adhesive composition by a method described later.
As described above, the average transmittance of the second pressure-sensitive adhesive layer 4 is adjusted in consideration of the balance between inspectability and antireflection properties, specifically, the average transmittance of the second pressure-sensitive adhesive layer 4 in the range of 300nm or more and 700nm or less is adjusted to 40% or more, preferably 50% or more, more preferably 60% or more, still more preferably 70% or more, and further, for example, 75% or less from the viewpoint of improving inspectability, and the average transmittance of the second pressure-sensitive adhesive layer 4 in the range of 300nm or more and 700nm or less is adjusted to 40% or more, and further, for example, 75% or less, preferably 70% or less, more preferably 60% or less, still more preferably 50% or less from the viewpoint of improving antireflection properties.
The haze value of the second pressure-sensitive adhesive layer 4 is, for example, 3% or less, preferably 2% or less, and more preferably 1% or less.
When the haze value of the second pressure-sensitive adhesive layer 4 is not more than the upper limit, the transparency of the pressure-sensitive adhesive sheet 1 is excellent.
In particular, if the haze value of the first pressure-sensitive adhesive layer 2, the haze value of the substrate 3, and the haze value of the second pressure-sensitive adhesive layer 4 are not more than the upper limit, the transparency of the pressure-sensitive adhesive sheet 1 is more excellent.
The thickness of the second pressure-sensitive adhesive layer 4 is, for example, 5 μm or more, preferably 10 μm or more, more preferably 15 μm or more, and further preferably 20 μm or more from the viewpoint of adhesiveness, and the thickness of the second pressure-sensitive adhesive layer 4 is, for example, 300 μm or less, preferably 100 μm or less, more preferably 60 μm or less, and further preferably 40 μm or less from the viewpoint of handling property.
As described above, each of the first adhesive composition and the second adhesive composition contains a polymer, a coloring component, a crosslinking agent incorporated as needed, a crosslinking catalyst incorporated as needed, and an additive incorporated as needed.
It is preferable that the kind and blending ratio of the polymer, the kind and blending ratio of the crosslinking agent blended as necessary, the kind and blending ratio of the crosslinking catalyst blended as necessary, the kind and blending ratio of the additive blended as necessary, and the blending ratio of the coloring component in the first pressure-sensitive adhesive composition and the second pressure-sensitive adhesive composition are the same, and only the kind of the coloring component is different.
In other words, it is preferable to adjust the average transmittance (described later) when the first adhesive layer 2, the substrate 3, and the second adhesive layer 4 are sequentially provided in the first adhesive composition and the second adhesive composition only by changing the kind of the coloring component.
5. Method for producing adhesive sheet
Next, a method for producing the adhesive sheet will be described with reference to fig. 2.
The method for producing the adhesive sheet comprises the following steps: the first pressure-sensitive adhesive layer 2 is prepared in the 1 st step, the second pressure-sensitive adhesive layer 4 is prepared in the 2 nd step, the substrate 3 is prepared in the 3 rd step, the first pressure-sensitive adhesive layer 2 is disposed on the other surface (lower surface) of the substrate 3 in the 4 th step, and the second pressure-sensitive adhesive layer 4 is disposed on the one surface (upper surface) of the substrate 3 in the 5 th step.
In the first step 1, as shown in fig. 2A, a first adhesive layer 2 is prepared.
Specifically, the first pressure-sensitive adhesive layer 2 is disposed on the upper surface of the release film 7.
Examples of the release film 7 include: flexible plastic films such as polyethylene, polypropylene, polyethylene terephthalate, and polyester films.
The thickness of the release film 7 is, for example, 3 μm or more, preferably 10 μm or more, and is, for example, 200 μm or less, preferably 100 μm or less, and more preferably 50 μm or less.
The release film 7 is preferably subjected to a release treatment with a release agent such as silicone, fluorine-containing, long-chain alkyl, or fatty acid amide, or a release treatment with silica powder.
In order to dispose the first pressure-sensitive adhesive layer 2 on the upper surface of the release film 7, for example, the first pressure-sensitive adhesive composition is applied to the upper surface of the release film 7 and dried to remove the solvent as necessary.
Examples of the method of applying the first adhesive composition include: roll coating, kiss roll coating, gravure coating, reverse coating, roll brushing, spray coating, dip roll coating, bar coating, knife coating, air knife coating, curtain coating, lip die coating, and the like.
The drying temperature is, for example, 50 ℃ or higher, preferably 70 ℃ or higher, more preferably 100 ℃ or higher, and, for example, 200 ℃ or lower, preferably 180 ℃ or lower, more preferably 150 ℃ or lower, and the drying time is, for example, 5 seconds or longer, preferably 10 seconds or longer, and, for example, 20 minutes or shorter, preferably 15 minutes or shorter, more preferably 10 minutes or shorter, and further preferably 3 minutes or shorter.
Thereby forming the first adhesive layer 2 on the upper surface of the release film 7.
When the first pressure-sensitive adhesive layer 2 contains a crosslinking agent, it is preferable to crosslink the pressure-sensitive adhesive layer by aging while drying the solvent or after drying the solvent (after laminating another release film 7 on the upper surface of the first pressure-sensitive adhesive layer 2).
The aging conditions are appropriately set depending on the kind of the crosslinking agent, and the aging temperature is, for example, 20 ℃ or higher, and is, for example, 160 ℃ or lower, and preferably 50 ℃ or lower, and the aging time is, for example, 1 minute or longer, preferably 12 hours or longer, more preferably 1 day or longer, and is, for example, 7 days or shorter.
In the 2 nd step, as shown in fig. 2B, a second adhesive layer 4 is prepared.
Specifically, the second pressure-sensitive adhesive layer 4 is disposed on the upper surface of the separately prepared release film 7.
In order to dispose the second pressure-sensitive adhesive layer 4 on the upper surface of the release film 7, for example, the second pressure-sensitive adhesive composition is applied to the upper surface of the release film 7 and the solvent is dried and removed as necessary.
The coating method and drying conditions of the second adhesive composition are the same as those of the first adhesive composition.
Thereby, the second pressure-sensitive adhesive layer 4 is formed on the upper surface of the release film 7.
When the second pressure-sensitive adhesive layer 4 contains a crosslinking agent, crosslinking is preferably performed by aging while drying and removing the solvent or after drying the solvent (after laminating the release film 7 on the upper surface of the second pressure-sensitive adhesive layer 4).
The aging conditions are the same as those described above for the first adhesive layer 2.
In the 3 rd step, as shown in fig. 2C, a substrate 3 is prepared.
In the 4 th step, as shown in fig. 2D, the first pressure-sensitive adhesive layer 2 is disposed (bonded) on the other surface (lower surface) of the base material 3.
Specifically, the first pressure-sensitive adhesive layer 2 disposed on the upper surface of the release film 7 is transferred onto the other surface (lower surface) of the substrate 3.
In order to transfer the first pressure-sensitive adhesive layer 2 disposed on the upper surface of the release film 7 to the other surface (lower surface) of the base material 3, first, when the release film 7 '(see the broken line in fig. 2A) is disposed on the upper surface of the first pressure-sensitive adhesive layer 2, the release film 7' is peeled off.
Next, the upper surface of the first pressure-sensitive adhesive layer 2 is brought into contact with the other surface (lower surface) of the substrate 3, and then the release film 7 on the other surface (lower surface) of the first pressure-sensitive adhesive layer 2 is peeled off.
Thereby, the first pressure-sensitive adhesive layer 2 is disposed on the other surface (lower surface) of the base material 3.
In the 5 th step, as shown in fig. 2E, the second pressure-sensitive adhesive layer 4 is disposed (bonded) on one surface (upper surface) of the base 3.
Specifically, the second pressure-sensitive adhesive layer 4 disposed on the upper surface of the release film 7 is transferred onto one surface (upper surface) of the base material 3.
In order to transfer the second pressure-sensitive adhesive layer 4 disposed on the upper surface of the release film 7 to one surface (upper surface) of the base material 3, first, when the release film 7 '(see the broken line in fig. 2B) is disposed on the upper surface of the second pressure-sensitive adhesive layer 4, the release film 7' is peeled off.
Next, the upper surface of the second pressure-sensitive adhesive layer 4 is brought into contact with one surface (upper surface) of the substrate 3, and then the release film 7 on one surface (upper surface) of the second pressure-sensitive adhesive layer 4 is peeled.
In this way, the second pressure-sensitive adhesive layer 4 is disposed on one surface (upper surface) of the substrate 3, and the pressure-sensitive adhesive sheet 1 having the first pressure-sensitive adhesive layer 2, the substrate 3, and the second pressure-sensitive adhesive layer 4 in this order is obtained.
In the above description, the release film 7 on the other surface (lower surface) of the first pressure-sensitive adhesive layer 2 is peeled in the 4 th step, but the release film 7 may be left without peeling the release film 7 until just before the lamination with the metal plate 5 described later.
In the step 5, the release film 7 on one surface (upper surface) of the second pressure-sensitive adhesive layer 4 is peeled off, but the release film 7 may be left without peeling off the release film 7 until just before the lamination with the optical device 6 described later.
In the 4 th step, as shown in fig. 2D, the substrate 3 and the first pressure-sensitive adhesive layer 2 are bonded to each other.
As described above, the average transmittance of the first pressure-sensitive adhesive layer 2 in the range of 300nm to 700nm is 40% or more, and the average transmittance of the substrate 3 at 550nm is 40% or more.
That is, since the first pressure-sensitive adhesive layer 2 and the substrate 3 have appropriate transparency, when the substrate 3 and the first pressure-sensitive adhesive layer 2 are bonded, mixing of foreign matter or the like can be easily confirmed, and as a result, inspectability is excellent.
In the 5 th step, as shown in fig. 2E, the substrate 3 and the second pressure-sensitive adhesive layer 4 are bonded to each other.
As described above, the average transmittance of the second pressure-sensitive adhesive layer 4 in the range of 300nm to 700nm is 40% or more, and the average transmittance of the substrate 3 at 550nm is 40% or more.
That is, since the second pressure-sensitive adhesive layer 4 and the substrate 3 have appropriate transparency, when the substrate 3 and the second pressure-sensitive adhesive layer 4 are bonded, mixing of foreign matter or the like can be easily confirmed, and as a result, inspectability is excellent.
As described above, each of the first pressure-sensitive adhesive layer 2, the substrate 3, and the second pressure-sensitive adhesive layer 4 has transparency (has a high average transmittance) to such an extent that contamination of foreign substances or the like can be confirmed, but when the first pressure-sensitive adhesive layer 2, the substrate 3, and the second pressure-sensitive adhesive layer 4 are provided in this order, the average transmittance is lowered.
Specifically, the average transmittance in the range of 300nm to 700nm is 30% or less, preferably 20% or less, and more preferably 10% or less when the first pressure-sensitive adhesive layer 2, the substrate 3, and the second pressure-sensitive adhesive layer 4 are provided in this order.
If the average transmittance is not more than the upper limit, reflection of light incident from the outside to the metal plate 5 (described later) can be suppressed even when the adhesive sheet 1 is attached to the metal plate 5 (described later) having a glossy surface.
As described above, in the psa sheet 1, the average transmittance is adjusted so that the average transmittance is high for each of the first psa layer 2, the substrate 3, and the second psa layer 4, and decreases when the psa sheet has the first psa layer 2, the substrate 3, and the second psa layer 4 in this order.
In such an adhesive sheet 1, it is preferable that at least two of the first adhesive layer 2, the substrate 3, and the second adhesive layer 4 satisfy one of the following conditions (1) to (3), and at least two of the layers satisfying the conditions satisfy different conditions from each other.
(1) The average transmittance in the range of 430nm to 460nm is 90% or less, preferably 70% or less.
(2) The average transmittance in the range of 530nm to 560nm is 90% or less, preferably 70% or less.
(3) The average transmittance in the range of 660nm to 690nm is 90% or less, preferably 70% or less.
That is, at least two layers have a wavelength range in which the average transmittance is relatively high in mutually different wavelength ranges in the wavelength range of 300nm or more and 700nm or less (hereinafter, referred to as a high transmittance range). On the other hand, at least two layers have wavelength ranges in which the average transmittance is relatively low in mutually different wavelength ranges in the wavelength range of 300nm or more and 700nm or less (hereinafter referred to as low transmittance ranges).
Since at least two layers have a high transmittance range, in the above-described 4 th step and 5 th step, when the layers are bonded, the mixing of foreign matter and the like can be easily confirmed, and as a result, the inspectability is excellent.
On the other hand, in the at least two layers, the high transmittance ranges are mutually different wavelength ranges. In other words, the high transmittance range of one layer is the low transmittance range of the other layer.
Therefore, if the layers are stacked one on another, the average transmittance in the wavelength range of 300nm to 700nm can be reduced (specifically, the average transmittance in the range of 300nm to 700nm can be 30% or less). This can improve the antireflection property.
6. Adhesive kit
In the materials used in the method for producing the adhesive sheet 1, the first adhesive layer 2 (the first adhesive layer 2 disposed on the upper surface of the release film 7), the substrate 3, and the second adhesive layer 4 (the second adhesive layer 4 disposed on the upper surface of the release film 7) constitute one embodiment of the adhesive kit of the present invention.
Specifically, the adhesive kit 11 has the first adhesive layer 2, the substrate 3, and the second adhesive layer 4 as at least two members independent of each other.
As such an adhesive kit 11, there can be mentioned: for example, as shown in fig. 3A, an adhesive kit 11 having the first adhesive layer 2, the substrate 3, and the second adhesive layer 4 as three mutually independent members; for example, as shown in fig. 3B, a bonding set 11 having a first adhesive layer 9 with a substrate and a second adhesive layer 4 as two members independent of each other, which have the first adhesive layer 2 and the substrate 3 in this order; for example, as shown in fig. 3C, a bonding set 11 having a first adhesive layer 2 and a second adhesive layer with a substrate having a substrate 3 and a second adhesive layer 4 in this order as two members independent of each other is preferable to list a bonding set 11 having a first adhesive layer 2 and a second adhesive layer 10 with a substrate having a substrate 3 and a second adhesive layer 4 in this order as two members independent of each other.
The adhesive kit is a kit that is separately circulated and can be used in industry.
7. Method for reinforcing optical device using adhesive sheet
As described above, the adhesive sheet 1 is excellent in antireflection.
Therefore, the adhesive sheet 1 can be suitably used for reinforcement of the optical device 6.
Therefore, an embodiment of a method for reinforcing an optical device 6 using the adhesive sheet 1 will be described with reference to fig. 4.
The method of reinforcing the optical device 6 using the adhesive sheet 1 has: a 6 th step of preparing the adhesive sheet 1; a 7 th step of attaching the pressure-sensitive adhesive sheet 1 to the optical device 6 so that the optical device 6 as a second adherend comes into contact with the second pressure-sensitive adhesive layer 4; and an 8 th step of attaching the pressure-sensitive adhesive sheet 1 to the metal plate 5 as the first adherend so that the metal plate 5 is in contact with the first pressure-sensitive adhesive layer 2.
In the 6 th step, as shown in fig. 4A, the adhesive sheet 1 is prepared.
In the 7 th step, as shown in fig. 4B, the adhesive sheet 1 is attached to the optical device 6 so that the optical device 6 is in contact with the second adhesive layer 4.
In the 8 th step, as shown in fig. 4C, the adhesive sheet 1 is attached to the metal plate 5 so that the metal plate 5 is in contact with the first adhesive layer 2.
The metal plate 5 is a support for imparting rigidity to the optical device 6, and examples thereof include a copper substrate, a SUS substrate (stainless steel substrate), and the like.
Thereby, the optical device 6 is reinforced, and the laminated body 8 having the metal plate 5, the first adhesive layer 2, the substrate 3, the second adhesive layer 4, and the optical device 6 in this order is obtained.
Since such a laminated body 8 has the metal plate 5, light incident from the optical device 6 side, for example, may be reflected by the metal plate 5.
However, since the average transmittance in the range of 300nm to 700nm is 30% or less when the adhesive sheet 1 includes the first adhesive layer 2, the substrate 3, and the second adhesive layer 4 in this order, light incident from the optical device 6 side can be reduced, and as a result, the reflection can be prevented.
In addition, as described above, since the adhesive sheet 1 is excellent in inspectability, the laminate 8 obtained using the adhesive sheet 1 is inhibited from being contaminated with foreign matter and the like.
8. Modification example
In the above description, the optical device 6 is reinforced using the adhesive sheet 1, but the optical device 6 may also be reinforced using the adhesive kit 11.
Therefore, an embodiment of a method for reinforcing the optical device 6 using the bonding kit 11 (specifically, the bonding kit 11 having the first adhesive layer 2 and the second adhesive layer 10 with a substrate having the substrate 3 and the second adhesive layer 4 in this order as two members independent of each other) will be described with reference to fig. 5.
The method of reinforcing the optical device 6 using the adhesive kit 11 has: a 9 th step of preparing a bonding kit 11; a 10 th step of bonding the second adhesive layer 10 with a base material to the optical device 6 so that the optical device 6 is in contact with the second adhesive layer 4; a 11 th step of bonding the first pressure-sensitive adhesive layer 2 to the metal plate 5 so that the metal plate 5 is in contact with the first pressure-sensitive adhesive layer 2; and a 12 th step of bonding the first pressure-sensitive adhesive layer 2 and the substrate 3 so that the first pressure-sensitive adhesive layer 2 is in contact with the substrate 3.
In the 9 th step, as shown in fig. 5A, a bonding kit 11 is prepared.
In the 10 th step, as shown in fig. 5B, the second adhesive layer 10 with a base material is stuck to the optical device 6 so that the optical device 6 is in contact with the second adhesive layer 4.
In the 11 th step, as shown in fig. 5C, the first pressure-sensitive adhesive layer 2 is bonded to the metal plate 5 so that the metal plate 5 is in contact with the first pressure-sensitive adhesive layer 2.
In the 12 th step, as shown in fig. 5D, the first pressure-sensitive adhesive layer 2 and the substrate 3 are bonded to each other so that the first pressure-sensitive adhesive layer 2 is in contact with the substrate 3.
Thereby, the optical device 6 is reinforced, and the laminated body 8 having the metal plate 5, the first adhesive layer 2, the substrate 3, the second adhesive layer 4, and the optical device 6 in this order is obtained.
As the optical device 6, there can be cited: organic Electroluminescent (EL) panels, liquid crystal panels, and the like.
In the above description, the metal plate 5 is exemplified as an example of the first adherend and the optical device 6 is exemplified as an example of the second adherend, but the first adherend and the second adherend are not limited thereto, and may be, for example, an electronic device such as a semiconductor or a component thereof.
[ examples ]
The present invention will be described more specifically below with reference to examples and comparative examples. The present invention is not limited to the examples and comparative examples. Specific numerical values such as the blending ratio (content ratio), the physical property value, and the parameter used in the following description may be replaced with the upper limit value (numerical value defined as "lower" or "smaller") or the lower limit value (numerical value defined as "upper" or "larger") described in the above-mentioned "embodiment" in accordance with the blending ratio (content ratio), the physical property value, and the parameter described in the above-mentioned "embodiment".
It is to be noted that, unless otherwise specified, "parts" and "%" are based on mass.
1. Details of the ingredients
The components used in the examples and comparative examples are described below.
2 EHA: 2-ethylhexyl acrylate
MMA: methacrylic acid methyl ester
NVP: n-vinyl pyrrolidone
HEA: 2-Hydroxyethyl acrylate
VALIFAST RED 3311: azo dyes, manufactured by Orient chemical industries, Ltd
VALIFAST BLUE 2680: phthalocyanine dye manufactured by Orient chemical industries, Ltd
VALIFAST BLACK 3810: azo dyes, manufactured by Orient chemical industries, Ltd
Takenate D110N: 75% ethyl acetate solution of trimethylolpropane adduct of xylylenediisocyanate, Mitsui chemical manufacturing
Lumiror S10 (thickness 23 μm): polyethylene terephthalate (PET) having a thickness of 23 μm, manufactured by Toray corporation
Neopulim S-100: polyimide resin, 50 μm thick manufactured by Mitsubishi gas chemical corporation
Lumiror S10 (thickness 50 μm): polyethylene terephthalate (PET) having a thickness of 50 μm, manufactured by Toray corporation
2. Preparation of polymers
Synthesis example 1
In a reaction vessel having a thermometer, a stirrer, a reflux condenser and a nitrogen gas inlet tube, 63 parts by mass of 2-ethylhexyl acrylate (2EHA), 15 parts by mass of N-vinylpyrrolidone (NVP), 9 parts by mass of Methyl Methacrylate (MMA) and 13 parts by mass of 2-hydroxyethyl acrylate (HEA) as monomer components were charged; 0.2 part by mass of azobisisobutyronitrile as a polymerization initiator; 233 parts by mass of ethyl acetate as a solvent was purged with nitrogen, and the nitrogen substitution was performed for about 1 hour while stirring. Then, the mixture was heated to 60 ℃ and reacted for 7 hours, thereby obtaining a solution of an acrylic polymer having a weight average molecular weight (Mw) of 1200000.
3. Production of adhesive sheet
Example 1
(step 1 (preparation of first adhesive composition and first adhesive layer))
A first adhesive composition was prepared by uniformly mixing 100 parts by mass (in terms of solid content) of the acrylic polymer solution of synthesis example 1, 1.1 parts by mass (in terms of solid content) of an isocyanate-based crosslinking agent (trade name "Takenate D110N", a 75% ethyl acetate solution of a trimethylolpropane adduct of xylylene diisocyanate, manufactured by mitsui chemical corporation), and 0.3 parts by weight (in terms of solid content) of a coloring agent (trade name "VALIFAST RED 3311", manufactured by Orient chemical industries, inc.) as a coloring component, and diluting with ethyl acetate so that the total solid content became 30% by weight.
Next, the first adhesive composition was applied to the surface release-treated resin film so that the thickness after drying was 25 μm, and drying was performed at a drying temperature of 130 ℃ for a drying time of 1 minute.
Thereby, the first adhesive layer disposed on the upper surface of the resin film was obtained.
Next, a silicone-treated surface of a release sheet containing a polyester resin, one surface of which was silicone-treated and had a thickness of 25 μm, was bonded to the upper surface of the first pressure-sensitive adhesive layer. Then, aging treatment was performed at normal temperature for 4 days to perform a crosslinking reaction of the polymer and the crosslinking agent.
(2 nd Process (preparation of second adhesive composition and second adhesive layer))
A second adhesive composition was prepared by uniformly mixing 100 parts by mass (in terms of solid content) of the acrylic polymer solution of synthesis example 1, 1.1 parts by mass (in terms of solid content) of an isocyanate-based crosslinking agent (trade name "Takenate D110N", a 75% ethyl acetate solution of a trimethylolpropane adduct of xylylene diisocyanate, manufactured by mitsui chemical corporation), and 0.3 parts by weight (in terms of solid content) of a coloring agent (trade name "valinstant BLUE 2680", manufactured by Orient chemical industries) as a coloring component, and diluting with ethyl acetate so that the total solid content became 30% by weight.
Next, the second adhesive composition was applied to the surface release-treated resin film so that the thickness after drying was 25 μm, and drying was performed at a drying temperature of 130 ℃ for a drying time of 1 minute.
Thereby, the second adhesive layer disposed on the upper surface of the resin film was obtained.
Next, a silicone-treated surface of a release sheet containing a polyester resin, one surface of which was silicone-treated and had a thickness of 25 μm, was bonded to the upper surface of the second pressure-sensitive adhesive layer. Then, aging treatment was performed at normal temperature for 4 days to perform a crosslinking reaction of the polymer and the crosslinking agent.
(step 3)
Uplix 25RN (25 μm thick, manufactured by Utsu Hippon Co., Ltd.) was prepared as a substrate.
(step 4)
The release sheet on the upper surface of the first adhesive layer is peeled off, and the peeled surface of the first adhesive layer is brought into contact with the other surface (lower surface) of the base material. Thus, the first pressure-sensitive adhesive layer is disposed on the other surface (lower surface) of the base material.
(step 5)
The release sheet on the upper surface of the second adhesive layer is peeled off, and the peeled surface of the second adhesive layer is brought into contact with one surface (upper surface) of the base material, whereby the second adhesive layer is disposed on the one surface (upper surface) of the base material.
Thus, a psa sheet was obtained having the first psa layer, the substrate and the second psa layer in this order.
Examples 2 to 7, comparative examples 1 and 2
Pressure-sensitive adhesive sheets were obtained by following the same procedure as in example 1, except that the blending ratio of the coloring component (VALIFAST RED3311) in the first pressure-sensitive adhesive layer, the kind of the base material, and the blending ratio of the coloring component (VALIFAST BLUE 2680) in the second pressure-sensitive adhesive layer were changed as shown in Table 1.
Comparative example 3
An adhesive composition was prepared by uniformly mixing 100 parts by mass (in terms of solid content) of the acrylic polymer solution of synthesis example 1, 1.1 parts by mass (in terms of solid content) of an isocyanate-based crosslinking agent (trade name "Takenate D110N", a 75% ethyl acetate solution of a trimethylolpropane adduct of xylylene diisocyanate, manufactured by mitsui chemical corporation), and 0.1 part by weight (in terms of solid content) of a coloring agent (trade name "valinstant BLACK 3810", manufactured by Orient chemical industries) as a coloring component, and diluting with ethyl acetate so that the total solid content became 30% by weight.
Next, the adhesive composition was applied to the surface release-treated resin film so that the thickness after drying was 25 μm, and drying was performed at a drying temperature of 130 ℃ for a drying time of 1 minute.
Thereby, an adhesive layer disposed on the upper surface of the resin film was obtained.
Next, a silicone-treated surface of a release sheet containing a polyester resin, one surface of which was silicone-treated and had a thickness of 25 μm, was bonded to the upper surface of the pressure-sensitive adhesive layer. Then, aging treatment was performed at normal temperature for 4 days to perform a crosslinking reaction of the polymer and the crosslinking agent.
Next, Uplix 25RN (25 μm thick, manufactured by Utsu Hippon Co., Ltd.) was prepared as a substrate.
Then, the release sheet on the upper surface of the adhesive layer is peeled off, and the adhesive layer is disposed on one surface of the substrate by bringing the release surface of the adhesive layer into contact with one surface of the substrate.
Thus, a pressure-sensitive adhesive sheet having a pressure-sensitive adhesive layer and a substrate in this order was obtained.
Comparative examples 4 to 6
Pressure-sensitive adhesive sheets were obtained by the same procedure as in comparative example 3, except that the blending ratio of the coloring component (VALIFAST BLACK 3810) in the pressure-sensitive adhesive layer and the type of the substrate were changed as shown in Table 1.
4. Evaluation of
(average transmittance)
In each of examples and comparative examples, the first adhesive layer disposed on the upper surface of the resin film was attached to the slide glass, and then the resin film was peeled off. Thus, a first adhesive layer for a sample was obtained.
Further, the second adhesive layer disposed on the upper surface of the resin film is stuck on the slide glass, and then the resin film is peeled off. Thus, a second adhesive layer for a sample was obtained.
In the adhesive sheets of examples and comparative examples, a glass slide was attached to the first adhesive layer, and another glass slide was attached to the second adhesive layer. After the sticking, the slide glass was reciprocated 1 time on the upper surface by the manual roller. Thus, a laminate was obtained.
The first adhesive layer for sample, the second adhesive layer for sample, the laminate, and the substrate were each set in a "U4100 type spectrophotometer" manufactured by hitachi high tech, inc, and the transmittance was measured. In the measurement, the average transmittance in the range of 300nm to 700nm and the average transmittance in the range of 530nm to 560nm were measured for the first pressure-sensitive adhesive layer for a sample, the average transmittance in the range of 300nm to 700nm and the average transmittance in the range of 660nm to 690nm were measured for the second pressure-sensitive adhesive layer for a sample, the average transmittance in the range of 300nm to 700nm was measured for the laminate, and the average transmittance at 550nm and the average transmittance in the range of 430nm to 460nm were measured for the substrate, based on the glass slide. The results are shown in table 2.
(measurement of haze)
In each of examples and comparative examples, the first pressure-sensitive adhesive layer for sample, the second pressure-sensitive adhesive layer for sample, the laminate, and the substrate were placed in "HM-150N" manufactured by mercurial color technology research institute, and the haze value was measured. The results are shown in table 2.
(visibility)
In each of examples and comparative examples, the first adhesive layer for a sample, the second adhesive layer for a sample, the laminate, and the base material were placed on a paper on which a black lan ring (ランドルト hooked) was printed (outer diameter 2cm), and the focusing function of "digital camera PowerShot SX620 HS" manufactured by canon corporation was used 10 times from a position 15cm from the placement surface.
The visibility was evaluated according to the following criteria.
Very good: 10 times of total focusing
Good: focusing 5 to 9 times
And (delta): focusing for 1-4 times
X: 0 times (not focused)
5. Investigation of
As for the evaluation of visibility, the evaluation of visibility of the first adhesive layer, the evaluation of visibility of the substrate, and the evaluation of visibility of the second adhesive layer of examples 1 to 7 were excellent.
Therefore, it was found that when the first pressure-sensitive adhesive layer and the substrate were bonded together and the second pressure-sensitive adhesive layer and the substrate were bonded together, the incorporation of foreign matter and the like could be easily confirmed, and the inspectability was excellent.
On the other hand, the evaluation of the visibility of the laminate in examples 1 to 7 was poor. In other words, when the first adhesive layer, the substrate, and the second adhesive layer are provided in this order, the transmission of light is suppressed. Therefore, it is found that the antireflection property is excellent.
Claims (7)
1. An adhesive sheet characterized in that,
the adhesive sheet comprises a first adhesive layer, a substrate and a second adhesive layer in this order,
an average transmittance of 30% or less in a range of 300nm to 700nm when the adhesive composition comprises the first adhesive layer, the substrate, and the second adhesive layer in this order,
the average transmittance of the first pressure-sensitive adhesive layer in the range of 300nm to 700nm is 40% or more,
an average transmittance of the second adhesive layer in a range of 300nm to 700nm of 40% or more, and
the average transmittance of the substrate at 550nm is 40% or more.
2. The adhesive sheet according to claim 1,
at least two layers among the first adhesive layer, the substrate, and the second adhesive layer satisfy one of the following conditions (1) to (3), and at least two layers satisfying the conditions satisfy mutually different conditions,
(1) an average transmittance in the range of 430nm to 460nm of 90% or less,
(2) an average transmittance of 90% or less in the range of 530nm to 560nm,
(3) an average transmittance in the range of 660nm to 690nm is 90% or less.
3. The adhesive sheet according to claim 1 or 2,
the first adhesive layer has a haze value of 3% or less,
the haze value of the base material is 10% or less, and
the second adhesive layer has a haze value of 3% or less.
4. The adhesive sheet according to claim 1 or 2,
the first adhesive layer contains an acrylic polymer, and
the second adhesive layer contains an acrylic polymer.
5. The adhesive sheet according to claim 1 or 2,
the first adhesive layer contains a dye or a pigment, and
the second adhesive layer contains a dye or a pigment.
6. An adhesive kit, characterized in that,
the adhesive kit has a first adhesive layer, a substrate and a second adhesive layer as at least two mutually independent components,
an average transmittance of 30% or less in a range of 300nm to 700nm when the adhesive composition comprises the first adhesive layer, the substrate, and the second adhesive layer in this order,
the average transmittance of the first pressure-sensitive adhesive layer in the range of 300nm to 700nm is 40% or more,
an average transmittance of the second adhesive layer in a range of 300nm to 700nm of 40% or more, and
the average transmittance of the substrate at 550nm is 40% or more.
7. A laminate characterized in that it comprises a laminate,
the laminate comprises a first adherend, a first pressure-sensitive adhesive layer, a base material, a second pressure-sensitive adhesive layer, and a second adherend in this order,
an average transmittance of 30% or less in a range of 300nm to 700nm when the adhesive composition comprises the first adhesive layer, the substrate, and the second adhesive layer in this order,
the average transmittance of the first pressure-sensitive adhesive layer in the range of 300nm to 700nm is 40% or more,
an average transmittance of the second adhesive layer in a range of 300nm to 700nm of 40% or more, and
the average transmittance of the substrate at 550nm is 40% or more.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019103798A JP2020196820A (en) | 2019-06-03 | 2019-06-03 | Pressure sensitive adhesive sheet, pressure sensitive adhesive kit and laminate |
| JP2019-103798 | 2019-06-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112029436A true CN112029436A (en) | 2020-12-04 |
Family
ID=73578790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010474252.3A Pending CN112029436A (en) | 2019-06-03 | 2020-05-29 | Adhesive sheet, adhesive kit, and laminate |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2020196820A (en) |
| KR (1) | KR20200139089A (en) |
| CN (1) | CN112029436A (en) |
| TW (1) | TW202106833A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1102885A (en) * | 1993-08-31 | 1995-05-24 | 住友水泥株式会社 | Antireflection film |
| JPH083520A (en) * | 1994-06-21 | 1996-01-09 | Sekisui Chem Co Ltd | Light-shielding tacky adhesive sheet |
| JPH08151557A (en) * | 1994-11-28 | 1996-06-11 | Sekisui Chem Co Ltd | Light-shading adhesive sheet or tape |
| JP2006131845A (en) * | 2004-11-09 | 2006-05-25 | Asahi Glass Co Ltd | New optical resin composition |
| JP2008195064A (en) * | 2007-01-18 | 2008-08-28 | Lintec Corp | Marking sheet, and display body |
| US20080311369A1 (en) * | 2007-06-13 | 2008-12-18 | Nitto Denko Corporation | Pressure-sensitive adhesive sheet |
| JP2011111530A (en) * | 2009-11-26 | 2011-06-09 | Hitachi Chem Co Ltd | Adhesive sheet and method for producing the same and method for producing semiconductor device and semiconductor device |
| JP2013245298A (en) * | 2012-05-25 | 2013-12-09 | Nitto Denko Corp | Colored adhesive sheet |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102035955B1 (en) | 2016-01-27 | 2019-10-23 | 닛토덴코 가부시키가이샤 | Stress distributing film, optical member, and electronic member |
-
2019
- 2019-06-03 JP JP2019103798A patent/JP2020196820A/en active Pending
-
2020
- 2020-05-29 KR KR1020200064699A patent/KR20200139089A/en unknown
- 2020-05-29 CN CN202010474252.3A patent/CN112029436A/en active Pending
- 2020-06-03 TW TW109118587A patent/TW202106833A/en unknown
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1102885A (en) * | 1993-08-31 | 1995-05-24 | 住友水泥株式会社 | Antireflection film |
| JPH083520A (en) * | 1994-06-21 | 1996-01-09 | Sekisui Chem Co Ltd | Light-shielding tacky adhesive sheet |
| JPH08151557A (en) * | 1994-11-28 | 1996-06-11 | Sekisui Chem Co Ltd | Light-shading adhesive sheet or tape |
| JP2006131845A (en) * | 2004-11-09 | 2006-05-25 | Asahi Glass Co Ltd | New optical resin composition |
| JP2008195064A (en) * | 2007-01-18 | 2008-08-28 | Lintec Corp | Marking sheet, and display body |
| US20080311369A1 (en) * | 2007-06-13 | 2008-12-18 | Nitto Denko Corporation | Pressure-sensitive adhesive sheet |
| JP2011111530A (en) * | 2009-11-26 | 2011-06-09 | Hitachi Chem Co Ltd | Adhesive sheet and method for producing the same and method for producing semiconductor device and semiconductor device |
| JP2013245298A (en) * | 2012-05-25 | 2013-12-09 | Nitto Denko Corp | Colored adhesive sheet |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20200139089A (en) | 2020-12-11 |
| TW202106833A (en) | 2021-02-16 |
| JP2020196820A (en) | 2020-12-10 |
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