CN117042961A - Laminated optical film - Google Patents
Laminated optical film Download PDFInfo
- Publication number
- CN117042961A CN117042961A CN202280022932.9A CN202280022932A CN117042961A CN 117042961 A CN117042961 A CN 117042961A CN 202280022932 A CN202280022932 A CN 202280022932A CN 117042961 A CN117042961 A CN 117042961A
- Authority
- CN
- China
- Prior art keywords
- optical film
- meth
- acrylate
- film
- adhesive layer
- 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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- 239000012788 optical film Substances 0.000 title claims abstract description 180
- 239000012790 adhesive layer Substances 0.000 claims abstract description 57
- 239000010408 film Substances 0.000 claims description 93
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 92
- 239000000203 mixture Substances 0.000 description 58
- 150000001875 compounds Chemical class 0.000 description 53
- -1 polyethylene terephthalate Polymers 0.000 description 42
- 238000000576 coating method Methods 0.000 description 21
- 239000011248 coating agent Substances 0.000 description 20
- 238000005259 measurement Methods 0.000 description 20
- 239000000853 adhesive Substances 0.000 description 18
- 230000001070 adhesive effect Effects 0.000 description 18
- 230000001681 protective effect Effects 0.000 description 18
- 238000000034 method Methods 0.000 description 17
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical group NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 16
- 238000012545 processing Methods 0.000 description 16
- 239000000178 monomer Substances 0.000 description 15
- 150000003254 radicals Chemical class 0.000 description 15
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 14
- 230000006378 damage Effects 0.000 description 14
- 230000001629 suppression Effects 0.000 description 14
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical class CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 13
- 238000006073 displacement reaction Methods 0.000 description 11
- 125000000524 functional group Chemical group 0.000 description 10
- 239000004593 Epoxy Substances 0.000 description 9
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 9
- 238000007373 indentation Methods 0.000 description 8
- 239000003999 initiator Substances 0.000 description 8
- 125000000217 alkyl group Chemical group 0.000 description 7
- 238000010538 cationic polymerization reaction Methods 0.000 description 7
- 239000003505 polymerization initiator Substances 0.000 description 7
- 229920002678 cellulose Polymers 0.000 description 6
- 235000010980 cellulose Nutrition 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- AHHWIHXENZJRFG-UHFFFAOYSA-N oxetane Chemical compound C1COC1 AHHWIHXENZJRFG-UHFFFAOYSA-N 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- 239000011342 resin composition Substances 0.000 description 6
- 239000004372 Polyvinyl alcohol Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 238000010894 electron beam technology Methods 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 239000003504 photosensitizing agent Substances 0.000 description 5
- 229920002451 polyvinyl alcohol Polymers 0.000 description 5
- BTJPUDCSZVCXFQ-UHFFFAOYSA-N 2,4-diethylthioxanthen-9-one Chemical compound C1=CC=C2C(=O)C3=CC(CC)=CC(CC)=C3SC2=C1 BTJPUDCSZVCXFQ-UHFFFAOYSA-N 0.000 description 4
- QYKIQEUNHZKYBP-UHFFFAOYSA-N Vinyl ether Chemical group C=COC=C QYKIQEUNHZKYBP-UHFFFAOYSA-N 0.000 description 4
- 150000003926 acrylamides Chemical class 0.000 description 4
- 125000002723 alicyclic group Chemical group 0.000 description 4
- 125000003710 aryl alkyl group Chemical group 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 125000002091 cationic group Chemical group 0.000 description 4
- 239000001913 cellulose Substances 0.000 description 4
- 125000000753 cycloalkyl group Chemical group 0.000 description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 4
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 4
- 229910052753 mercury Inorganic materials 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 4
- 229920002554 vinyl polymer Polymers 0.000 description 4
- LWRBVKNFOYUCNP-UHFFFAOYSA-N 2-methyl-1-(4-methylsulfanylphenyl)-2-morpholin-4-ylpropan-1-one Chemical compound C1=CC(SC)=CC=C1C(=O)C(C)(C)N1CCOCC1 LWRBVKNFOYUCNP-UHFFFAOYSA-N 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 3
- 229910052736 halogen Inorganic materials 0.000 description 3
- 150000002367 halogens Chemical class 0.000 description 3
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 3
- UUORTJUPDJJXST-UHFFFAOYSA-N n-(2-hydroxyethyl)prop-2-enamide Chemical compound OCCNC(=O)C=C UUORTJUPDJJXST-UHFFFAOYSA-N 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 125000003566 oxetanyl group Chemical group 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 229920000098 polyolefin Polymers 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- HHQAGBQXOWLTLL-UHFFFAOYSA-N (2-hydroxy-3-phenoxypropyl) prop-2-enoate Chemical compound C=CC(=O)OCC(O)COC1=CC=CC=C1 HHQAGBQXOWLTLL-UHFFFAOYSA-N 0.000 description 2
- UNMJLQGKEDTEKJ-UHFFFAOYSA-N (3-ethyloxetan-3-yl)methanol Chemical compound CCC1(CO)COC1 UNMJLQGKEDTEKJ-UHFFFAOYSA-N 0.000 description 2
- BXSPZNVFEYWSLZ-UHFFFAOYSA-N (3-phenoxyphenyl)methyl prop-2-enoate Chemical compound C=CC(=O)OCC1=CC=CC(OC=2C=CC=CC=2)=C1 BXSPZNVFEYWSLZ-UHFFFAOYSA-N 0.000 description 2
- ZDQNWDNMNKSMHI-UHFFFAOYSA-N 1-[2-(2-prop-2-enoyloxypropoxy)propoxy]propan-2-yl prop-2-enoate Chemical compound C=CC(=O)OC(C)COC(C)COCC(C)OC(=O)C=C ZDQNWDNMNKSMHI-UHFFFAOYSA-N 0.000 description 2
- WULAHPYSGCVQHM-UHFFFAOYSA-N 2-(2-ethenoxyethoxy)ethanol Chemical compound OCCOCCOC=C WULAHPYSGCVQHM-UHFFFAOYSA-N 0.000 description 2
- IAMASUILMZETHW-UHFFFAOYSA-N 2-(2-hydroxyethoxy)-1-phenoxyethanol;prop-2-enoic acid Chemical compound OC(=O)C=C.OCCOCC(O)OC1=CC=CC=C1 IAMASUILMZETHW-UHFFFAOYSA-N 0.000 description 2
- TXBCBTDQIULDIA-UHFFFAOYSA-N 2-[[3-hydroxy-2,2-bis(hydroxymethyl)propoxy]methyl]-2-(hydroxymethyl)propane-1,3-diol Chemical compound OCC(CO)(CO)COCC(CO)(CO)CO TXBCBTDQIULDIA-UHFFFAOYSA-N 0.000 description 2
- KANZWHBYRHQMKZ-UHFFFAOYSA-N 2-ethenylpyrazine Chemical compound C=CC1=CN=CC=N1 KANZWHBYRHQMKZ-UHFFFAOYSA-N 0.000 description 2
- BIDWUUDRRVHZLQ-UHFFFAOYSA-N 3-ethyl-3-(2-ethylhexoxymethyl)oxetane Chemical compound CCCCC(CC)COCC1(CC)COC1 BIDWUUDRRVHZLQ-UHFFFAOYSA-N 0.000 description 2
- JUXZNIDKDPLYBY-UHFFFAOYSA-N 3-ethyl-3-(phenoxymethyl)oxetane Chemical compound C=1C=CC=CC=1OCC1(CC)COC1 JUXZNIDKDPLYBY-UHFFFAOYSA-N 0.000 description 2
- FNYWFRSQRHGKJT-UHFFFAOYSA-N 3-ethyl-3-[(3-ethyloxetan-3-yl)methoxymethyl]oxetane Chemical compound C1OCC1(CC)COCC1(CC)COC1 FNYWFRSQRHGKJT-UHFFFAOYSA-N 0.000 description 2
- LMIOYAVXLAOXJI-UHFFFAOYSA-N 3-ethyl-3-[[4-[(3-ethyloxetan-3-yl)methoxymethyl]phenyl]methoxymethyl]oxetane Chemical compound C=1C=C(COCC2(CC)COC2)C=CC=1COCC1(CC)COC1 LMIOYAVXLAOXJI-UHFFFAOYSA-N 0.000 description 2
- OZJPLYNZGCXSJM-UHFFFAOYSA-N 5-valerolactone Chemical compound O=C1CCCCO1 OZJPLYNZGCXSJM-UHFFFAOYSA-N 0.000 description 2
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 2
- 229920002284 Cellulose triacetate Polymers 0.000 description 2
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-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
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 2
- 239000002841 Lewis acid Substances 0.000 description 2
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- NNLVGZFZQQXQNW-ADJNRHBOSA-N [(2r,3r,4s,5r,6s)-4,5-diacetyloxy-3-[(2s,3r,4s,5r,6r)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6s)-4,5,6-triacetyloxy-2-(acetyloxymethyl)oxan-3-yl]oxyoxan-2-yl]methyl acetate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](OC(C)=O)[C@H]1OC(C)=O)O[C@H]1[C@@H]([C@@H](OC(C)=O)[C@H](OC(C)=O)[C@@H](COC(C)=O)O1)OC(C)=O)COC(=O)C)[C@@H]1[C@@H](COC(C)=O)O[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@H]1OC(C)=O NNLVGZFZQQXQNW-ADJNRHBOSA-N 0.000 description 2
- 125000003647 acryloyl group Chemical group O=C([*])C([H])=C([H])[H] 0.000 description 2
- 125000003545 alkoxy group Chemical group 0.000 description 2
- MWPLVEDNUUSJAV-UHFFFAOYSA-N anthracene Natural products C1=CC=CC2=CC3=CC=CC=C3C=C21 MWPLVEDNUUSJAV-UHFFFAOYSA-N 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 239000012965 benzophenone Substances 0.000 description 2
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 150000001768 cations Chemical class 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000003431 cross linking reagent Substances 0.000 description 2
- 125000001511 cyclopentyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 description 2
- 238000004043 dyeing Methods 0.000 description 2
- 125000003700 epoxy group Chemical group 0.000 description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- 230000001747 exhibiting effect Effects 0.000 description 2
- 229910052733 gallium Inorganic materials 0.000 description 2
- 229920001477 hydrophilic polymer Polymers 0.000 description 2
- 229910052740 iodine Inorganic materials 0.000 description 2
- 239000011630 iodine Substances 0.000 description 2
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 2
- 150000003951 lactams Chemical class 0.000 description 2
- 150000007517 lewis acids Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910001507 metal halide Inorganic materials 0.000 description 2
- 150000005309 metal halides Chemical class 0.000 description 2
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- 125000001280 n-hexyl group Chemical group C(CCCCC)* 0.000 description 2
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 125000003367 polycyclic group Chemical group 0.000 description 2
- 150000004291 polyenes Chemical class 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 229920006267 polyester film Polymers 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 229920006254 polymer film Polymers 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- YRHRIQCWCFGUEQ-UHFFFAOYSA-N thioxanthen-9-one Chemical class C1=CC=C2C(=O)C3=CC=CC=C3SC2=C1 YRHRIQCWCFGUEQ-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
- SKYXLDSRLNRAPS-UHFFFAOYSA-N 1,2,4-trifluoro-5-methoxybenzene Chemical compound COC1=CC(F)=C(F)C=C1F SKYXLDSRLNRAPS-UHFFFAOYSA-N 0.000 description 1
- CYIGRWUIQAVBFG-UHFFFAOYSA-N 1,2-bis(2-ethenoxyethoxy)ethane Chemical compound C=COCCOCCOCCOC=C CYIGRWUIQAVBFG-UHFFFAOYSA-N 0.000 description 1
- MSAHTMIQULFMRG-UHFFFAOYSA-N 1,2-diphenyl-2-propan-2-yloxyethanone Chemical compound C=1C=CC=CC=1C(OC(C)C)C(=O)C1=CC=CC=C1 MSAHTMIQULFMRG-UHFFFAOYSA-N 0.000 description 1
- ALVZNPYWJMLXKV-UHFFFAOYSA-N 1,9-Nonanediol Chemical compound OCCCCCCCCCO ALVZNPYWJMLXKV-UHFFFAOYSA-N 0.000 description 1
- CTOHEPRICOKHIV-UHFFFAOYSA-N 1-dodecylthioxanthen-9-one Chemical compound S1C2=CC=CC=C2C(=O)C2=C1C=CC=C2CCCCCCCCCCCC CTOHEPRICOKHIV-UHFFFAOYSA-N 0.000 description 1
- HWCLMKDWXUGDKL-UHFFFAOYSA-N 1-ethenoxy-2-ethoxyethane Chemical compound CCOCCOC=C HWCLMKDWXUGDKL-UHFFFAOYSA-N 0.000 description 1
- GXZPMXGRNUXGHN-UHFFFAOYSA-N 1-ethenoxy-2-methoxyethane Chemical compound COCCOC=C GXZPMXGRNUXGHN-UHFFFAOYSA-N 0.000 description 1
- UBPXWZDJZFZKGH-UHFFFAOYSA-N 1-ethenyl-3-methylpyrrolidin-2-one Chemical compound CC1CCN(C=C)C1=O UBPXWZDJZFZKGH-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
- YIKSHDNOAYSSPX-UHFFFAOYSA-N 1-propan-2-ylthioxanthen-9-one Chemical compound S1C2=CC=CC=C2C(=O)C2=C1C=CC=C2C(C)C YIKSHDNOAYSSPX-UHFFFAOYSA-N 0.000 description 1
- RHNJVKIVSXGYBD-UHFFFAOYSA-N 10-prop-2-enoyloxydecyl prop-2-enoate Chemical compound C=CC(=O)OCCCCCCCCCCOC(=O)C=C RHNJVKIVSXGYBD-UHFFFAOYSA-N 0.000 description 1
- IFSLSXUHNIVHPB-UHFFFAOYSA-N 2,2-dimethylpropane-1,3-diol;3-hydroxy-2,2-dimethylpropanoic acid;prop-2-enoic acid Chemical compound OC(=O)C=C.OCC(C)(C)CO.OCC(C)(C)C(O)=O IFSLSXUHNIVHPB-UHFFFAOYSA-N 0.000 description 1
- BRKORVYTKKLNKX-UHFFFAOYSA-N 2,4-di(propan-2-yl)thioxanthen-9-one Chemical compound C1=CC=C2C(=O)C3=CC(C(C)C)=CC(C(C)C)=C3SC2=C1 BRKORVYTKKLNKX-UHFFFAOYSA-N 0.000 description 1
- UXCIJKOCUAQMKD-UHFFFAOYSA-N 2,4-dichlorothioxanthen-9-one Chemical compound C1=CC=C2C(=O)C3=CC(Cl)=CC(Cl)=C3SC2=C1 UXCIJKOCUAQMKD-UHFFFAOYSA-N 0.000 description 1
- LCHAFMWSFCONOO-UHFFFAOYSA-N 2,4-dimethylthioxanthen-9-one Chemical compound C1=CC=C2C(=O)C3=CC(C)=CC(C)=C3SC2=C1 LCHAFMWSFCONOO-UHFFFAOYSA-N 0.000 description 1
- HLIQLHSBZXDKLV-UHFFFAOYSA-N 2-(2-hydroxyethoxy)-1-phenoxyethanol Chemical compound OCCOCC(O)OC1=CC=CC=C1 HLIQLHSBZXDKLV-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
- LCZVSXRMYJUNFX-UHFFFAOYSA-N 2-[2-(2-hydroxypropoxy)propoxy]propan-1-ol Chemical compound CC(O)COC(C)COC(C)CO LCZVSXRMYJUNFX-UHFFFAOYSA-N 0.000 description 1
- FGTYTUFKXYPTML-UHFFFAOYSA-N 2-benzoylbenzoic acid Chemical compound OC(=O)C1=CC=CC=C1C(=O)C1=CC=CC=C1 FGTYTUFKXYPTML-UHFFFAOYSA-N 0.000 description 1
- UHFFVFAKEGKNAQ-UHFFFAOYSA-N 2-benzyl-2-(dimethylamino)-1-(4-morpholin-4-ylphenyl)butan-1-one Chemical compound C=1C=C(N2CCOCC2)C=CC=1C(=O)C(CC)(N(C)C)CC1=CC=CC=C1 UHFFVFAKEGKNAQ-UHFFFAOYSA-N 0.000 description 1
- DZZAHLOABNWIFA-UHFFFAOYSA-N 2-butoxy-1,2-diphenylethanone Chemical compound C=1C=CC=CC=1C(OCCCC)C(=O)C1=CC=CC=C1 DZZAHLOABNWIFA-UHFFFAOYSA-N 0.000 description 1
- ZCDADJXRUCOCJE-UHFFFAOYSA-N 2-chlorothioxanthen-9-one Chemical compound C1=CC=C2C(=O)C3=CC(Cl)=CC=C3SC2=C1 ZCDADJXRUCOCJE-UHFFFAOYSA-N 0.000 description 1
- VUIWJRYTWUGOOF-UHFFFAOYSA-N 2-ethenoxyethanol Chemical compound OCCOC=C VUIWJRYTWUGOOF-UHFFFAOYSA-N 0.000 description 1
- PGMMQIGGQSIEGH-UHFFFAOYSA-N 2-ethenyl-1,3-oxazole Chemical compound C=CC1=NC=CO1 PGMMQIGGQSIEGH-UHFFFAOYSA-N 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
- KMNCBSZOIQAUFX-UHFFFAOYSA-N 2-ethoxy-1,2-diphenylethanone Chemical compound C=1C=CC=CC=1C(OCC)C(=O)C1=CC=CC=C1 KMNCBSZOIQAUFX-UHFFFAOYSA-N 0.000 description 1
- WVQHODUGKTXKQF-UHFFFAOYSA-N 2-ethyl-2-methylhexane-1,1-diol Chemical compound CCCCC(C)(CC)C(O)O WVQHODUGKTXKQF-UHFFFAOYSA-N 0.000 description 1
- NLGDWWCZQDIASO-UHFFFAOYSA-N 2-hydroxy-1-(7-oxabicyclo[4.1.0]hepta-1,3,5-trien-2-yl)-2-phenylethanone Chemical class OC(C(=O)c1cccc2Oc12)c1ccccc1 NLGDWWCZQDIASO-UHFFFAOYSA-N 0.000 description 1
- 125000000954 2-hydroxyethyl group Chemical group [H]C([*])([H])C([H])([H])O[H] 0.000 description 1
- BQZJOQXSCSZQPS-UHFFFAOYSA-N 2-methoxy-1,2-diphenylethanone Chemical compound C=1C=CC=CC=1C(OC)C(=O)C1=CC=CC=C1 BQZJOQXSCSZQPS-UHFFFAOYSA-N 0.000 description 1
- 125000004200 2-methoxyethyl group Chemical group [H]C([H])([H])OC([H])([H])C([H])([H])* 0.000 description 1
- MYISVPVWAQRUTL-UHFFFAOYSA-N 2-methylthioxanthen-9-one Chemical compound C1=CC=C2C(=O)C3=CC(C)=CC=C3SC2=C1 MYISVPVWAQRUTL-UHFFFAOYSA-N 0.000 description 1
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 1
- KGIGUEBEKRSTEW-UHFFFAOYSA-N 2-vinylpyridine Chemical compound C=CC1=CC=CC=N1 KGIGUEBEKRSTEW-UHFFFAOYSA-N 0.000 description 1
- XXCRXPYEAMCJKH-UHFFFAOYSA-N 3,3,4-trimethyloxepan-2-one Chemical compound CC1CCCOC(=O)C1(C)C XXCRXPYEAMCJKH-UHFFFAOYSA-N 0.000 description 1
- UVRCNEIYXSRHNT-UHFFFAOYSA-N 3-ethylpent-2-enamide Chemical compound CCC(CC)=CC(N)=O UVRCNEIYXSRHNT-UHFFFAOYSA-N 0.000 description 1
- QOXOZONBQWIKDA-UHFFFAOYSA-N 3-hydroxypropyl Chemical group [CH2]CCO QOXOZONBQWIKDA-UHFFFAOYSA-N 0.000 description 1
- CYUZOYPRAQASLN-UHFFFAOYSA-N 3-prop-2-enoyloxypropanoic acid Chemical compound OC(=O)CCOC(=O)C=C CYUZOYPRAQASLN-UHFFFAOYSA-N 0.000 description 1
- HMBNQNDUEFFFNZ-UHFFFAOYSA-N 4-ethenoxybutan-1-ol Chemical compound OCCCCOC=C HMBNQNDUEFFFNZ-UHFFFAOYSA-N 0.000 description 1
- CFZDMXAOSDDDRT-UHFFFAOYSA-N 4-ethenylmorpholine Chemical compound C=CN1CCOCC1 CFZDMXAOSDDDRT-UHFFFAOYSA-N 0.000 description 1
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- GUCYFKSBFREPBC-UHFFFAOYSA-N [phenyl-(2,4,6-trimethylbenzoyl)phosphoryl]-(2,4,6-trimethylphenyl)methanone Chemical compound CC1=CC(C)=CC(C)=C1C(=O)P(=O)(C=1C=CC=CC=1)C(=O)C1=C(C)C=C(C)C=C1C GUCYFKSBFREPBC-UHFFFAOYSA-N 0.000 description 1
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- 150000001454 anthracenes Chemical class 0.000 description 1
- BBEAQIROQSPTKN-UHFFFAOYSA-N antipyrene Natural products C1=CC=C2C=CC3=CC=CC4=CC=C1C2=C43 BBEAQIROQSPTKN-UHFFFAOYSA-N 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- WURBFLDFSFBTLW-UHFFFAOYSA-N benzil Chemical group C=1C=CC=CC=1C(=O)C(=O)C1=CC=CC=C1 WURBFLDFSFBTLW-UHFFFAOYSA-N 0.000 description 1
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 description 1
- 150000008366 benzophenones Chemical class 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 150000001728 carbonyl compounds Chemical class 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000003851 corona treatment Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- LDHQCZJRKDOVOX-NSCUHMNNSA-N crotonic acid Chemical compound C\C=C\C(O)=O LDHQCZJRKDOVOX-NSCUHMNNSA-N 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 150000008049 diazo compounds Chemical class 0.000 description 1
- 238000007607 die coating method Methods 0.000 description 1
- FULIVAOPQQVMDQ-UHFFFAOYSA-N dimethoxymethane;propane Chemical compound CCC.COCOC FULIVAOPQQVMDQ-UHFFFAOYSA-N 0.000 description 1
- 239000004205 dimethyl polysiloxane Substances 0.000 description 1
- 125000002147 dimethylamino group Chemical group [H]C([H])([H])N(*)C([H])([H])[H] 0.000 description 1
- VFHVQBAGLAREND-UHFFFAOYSA-N diphenylphosphoryl-(2,4,6-trimethylphenyl)methanone Chemical compound CC1=CC(C)=CC(C)=C1C(=O)P(=O)(C=1C=CC=CC=1)C1=CC=CC=C1 VFHVQBAGLAREND-UHFFFAOYSA-N 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- BXKDSDJJOVIHMX-UHFFFAOYSA-N edrophonium chloride Chemical compound [Cl-].CC[N+](C)(C)C1=CC=CC(O)=C1 BXKDSDJJOVIHMX-UHFFFAOYSA-N 0.000 description 1
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- GVEPBJHOBDJJJI-UHFFFAOYSA-N fluoranthrene Natural products C1=CC(C2=CC=CC=C22)=C3C2=CC=CC3=C1 GVEPBJHOBDJJJI-UHFFFAOYSA-N 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000001530 fumaric acid Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000007756 gravure coating Methods 0.000 description 1
- 150000002366 halogen compounds Chemical class 0.000 description 1
- XXMIOPMDWAUFGU-UHFFFAOYSA-N hexane-1,6-diol Chemical compound OCCCCCCO XXMIOPMDWAUFGU-UHFFFAOYSA-N 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 125000004029 hydroxymethyl group Chemical group [H]OC([H])([H])* 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
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- 239000004973 liquid crystal related substance Substances 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 125000005641 methacryl group Chemical group 0.000 description 1
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 1
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- 229920003986 novolac Polymers 0.000 description 1
- OTLDLKLSNZMTTA-UHFFFAOYSA-N octahydro-1h-4,7-methanoindene-1,5-diyldimethanol Chemical compound C1C2C3C(CO)CCC3C1C(CO)C2 OTLDLKLSNZMTTA-UHFFFAOYSA-N 0.000 description 1
- 150000002898 organic sulfur compounds Chemical class 0.000 description 1
- 125000001037 p-tolyl group Chemical group [H]C1=C([H])C(=C([H])C([H])=C1*)C([H])([H])[H] 0.000 description 1
- 125000000913 palmityl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- 125000003538 pentan-3-yl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])C([H])([H])[H] 0.000 description 1
- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 1
- 125000000951 phenoxy group Chemical group [H]C1=C([H])C([H])=C(O*)C([H])=C1[H] 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 230000002165 photosensitisation Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000009832 plasma treatment Methods 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 239000011112 polyethylene naphthalate Substances 0.000 description 1
- 229920006290 polyethylene naphthalate film Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 229920006012 semi-aromatic polyamide Polymers 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 125000001973 tert-pentyl group Chemical group [H]C([H])([H])C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- UWHCKJMYHZGTIT-UHFFFAOYSA-N tetraethylene glycol Chemical compound OCCOCCOCCOCCO UWHCKJMYHZGTIT-UHFFFAOYSA-N 0.000 description 1
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- 229960000834 vinyl ether Drugs 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
- PAPBSGBWRJIAAV-UHFFFAOYSA-N ε-Caprolactone Chemical compound O=C1CCCCCO1 PAPBSGBWRJIAAV-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- 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
- C09J201/00—Adhesives based on unspecified macromolecular compounds
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Laminated Bodies (AREA)
- Adhesive Tapes (AREA)
Abstract
The laminated optical film (X) of the present invention comprises an optical film (10), an adhesive layer (30), and an optical film (20) in this order in the thickness direction (H), wherein the adhesive layer (30) is joined to the optical film (10) and to the optical film (20), and the adhesive layer (30) has a protruding end (30 a), and the protruding end (30 a) protrudes further outward in the plane direction orthogonal to the thickness direction (H) than the end edge (11) of the optical film (10) and the end edge (21) of the optical film (20).
Description
Technical Field
The present invention relates to a laminated optical film.
Background
The display panel has a laminated structure including a pixel panel, a touch panel, a surface protection cover, and the like, for example. Various functional optical films having a given optical function are also included in the laminated structure of the display panel. Examples of the functional optical film include a polarizer film and a retardation film. The functional optical film is introduced into the laminated structure in a state of being bonded to other optical films such as a protective film via an adhesive, that is, in a state of being laminated with the optical films. Such a laminated optical film is described in, for example, patent document 1 below.
Prior art literature
Patent literature
Patent document 1: japanese patent laid-open No. 2019-147865
Disclosure of Invention
Problems to be solved by the invention
With the thinning of display panels, the thinning of optical films has progressed. The thinner the optical film in the laminated optical film, the more easily the end portion of the laminated optical film is damaged such as a crack due to an external force. If a crack is generated at an end portion of the laminated optical film, the crack propagates, for example, so as to extend in an inner region in a plane direction of the film. The occurrence of cracks at the end is not preferable because of such large cracks. In addition, in a non-rectangular shaped display panel, even the display function up to the end edge of the panel is utilized, and therefore, suppression of end cracks is strongly demanded. Conventionally, in a special-shaped display panel such as a smart phone, when a device into which the panel is incorporated is used for a long period of time, a microcrack at the panel end portion of the periphery of the special-shaped processing is developed into the panel, so that a bright line is likely to be generated on the display screen of the device, and suppression of such a problem is strongly demanded.
The present invention provides a laminated optical film suitable for suppressing damage to an end portion of the optical film.
Means for solving the problems
The invention [1] comprises a laminated optical film comprising, in order in the thickness direction, a 1 st optical film, an adhesive layer, and a 2 nd optical film,
The adhesive layer is bonded to the 1 st optical film and to the 2 nd optical film, and the adhesive layer has a protruding end portion protruding further outward than the 1 st end edge of the 1 st optical film and the 2 nd end edge of the 2 nd optical film in a plane direction orthogonal to the thickness direction.
In the present laminated optical film, as described above, the adhesive layer sandwiched between the 1 st optical film and the 2 nd optical film has protruding end portions protruding further to the outside than both optical films. When the exterior member approaches the laminated optical films from the outer side in the plane direction and collides at a portion where such a protruding end portion exists, for example, the protruding end portion protruding further outward than the two optical films collides with the exterior member. Thereby, further access of the exterior member is prevented, and collision of the exterior member against the 1 st end edge of the 1 st optical film and the 2 nd end edge of the 2 nd optical film can be prevented. Alternatively, even if the exterior member collides with the 1 st end edge and/or the 2 nd end edge, the collision force against these ends is relaxed. Such prevention of collision and alleviation of collision force are suitable for suppressing damage to the end portions of the optical film in the laminated optical film. In addition, the adhesive layer of the laminated optical film has an extended end portion suitable for suppressing generation/propagation of microcracks at the end portions of the 1 st optical film/the 2 nd optical film.
The invention [2] includes the laminated optical film of [1], wherein the 1 st optical film is a polarizer film, and the 1 st end edge is located further outside the 2 nd end edge in the plane direction.
Such a configuration is preferable for suppressing damage to the 2 nd end edge of the 2 nd optical film in the laminated optical film.
The invention [3] includes the laminated optical film described in the above [1] or [2], wherein,
in the plane direction, the extension length of the extension end from the 1 st end edge is 0.01 μm or more and 5 μm or less.
Such a configuration is preferable for both the suppression of damage and the suppression of peeling at the 1 st end edge of the 1 st optical film.
The invention [4] includes the laminated optical film according to any one of the above [1] to [3], wherein,
in the plane direction, the extension length of the extension end from the 2 nd end edge is 0.03 μm or more and 10 μm or less.
Such a configuration is preferable for both the suppression of damage and the suppression of peeling at the 2 nd end edge of the 2 nd optical film.
The invention [5] includes the laminated optical film according to any one of the above [1] to [4], wherein,
the adhesive layer has a press-in elastic modulus E1 at 25 ℃ and the adhesive layer has a press-in elastic modulus E2 at 80 ℃ that satisfy 0.05.ltoreq.E2/E1.ltoreq.0.25.
Such a configuration is preferable for forming the above-described protruding end portion in the case of manufacturing the laminated optical film by film profile processing in which the temperature of the laminated optical film end portion is raised.
Drawings
Fig. 1 is a schematic cross-sectional view of one embodiment of a laminated optical film of the present invention.
Fig. 2 is an enlarged cross-sectional view of an end portion of the laminated optical film shown in fig. 1.
Fig. 3 shows one function of the protruding end of the adhesive layer.
Symbol description
X-layer laminated optical film
H thickness direction
10 optical film (1 st optical film)
11 end edge (1 st end edge)
20 optical film (2 nd optical film)
21 end edge (2 nd end edge)
30. Adhesive layer
30a protruding end portion
31. End edge
Detailed Description
As shown in fig. 1, a laminated optical film X, which is an embodiment of the laminated optical film of the present invention, includes an optical film 10 (1 st optical film), an optical film 20 (2 nd optical film), and an adhesive layer 30. The laminated optical film X has a sheet shape of a given thickness, and is spread in a direction (plane direction) orthogonal to the thickness direction H. Specifically, the laminated optical film X includes the optical film 10, the adhesive layer 30, and the optical film 20 in this order in the thickness direction H. The adhesive layer 30 bonds the optical films 10, 20 together between them. The laminated optical film X is a composite film introduced into the laminated structure of the display panel. The laminated optical film X may be a single sheet or a roll.
In the present embodiment, the optical film 10 is a functional optical film. Examples of the functional optical film include a polarizer film and a retardation film.
Examples of the polarizer film include hydrophilic polymer films subjected to dyeing treatment with a dichroic substance and subsequent stretching treatment. Examples of the dichroic substance include iodine and dichroic dyes. Examples of the hydrophilic polymer film include: polyvinyl alcohol (PVA) films, partially methylated PVA films, and partially saponified films of ethylene-vinyl acetate copolymers. As the polarizer film, a polyene alignment film can be also mentioned. Examples of the material of the polyene oriented film include: a dehydrated product of PVA, and a desalted product of polyvinyl chloride. As the polarizer film, a PVA film subjected to a dyeing treatment with iodine and a subsequent unidirectional stretching treatment is preferable in view of excellent optical characteristics such as polarization characteristics.
From the viewpoint of thickness reduction, the thickness of the optical film 10 as a polarizer film is preferably 15 μm or less, more preferably 12 μm or less, further preferably 10 μm or less, particularly preferably 8 μm or less. The thin polarizer film is excellent in visibility because of small thickness unevenness, and is excellent in durability against thermal shock because of small dimensional change due to temperature change. From the viewpoint of strength, the thickness of the optical film 10 as a polarizer film is preferably 3 μm or more, more preferably 5 μm or more.
Examples of the retardation film include: lambda/2 wavelength film, lambda/4 wavelength film, and viewing angle compensation film. Examples of the material of the retardation film include a polymer film which is birefringent by stretching. Examples of the polymer film include a cellulose film and a polyester film. Examples of the cellulose film include cellulose triacetate film. Examples of the polyester film include polyethylene terephthalate film and polyethylene naphthalate film. The thickness of the optical film 10 as the retardation film is, for example, 20 μm or more and, for example, 150 μm or less. As the retardation film, a film having a substrate such as a cellulose film and an alignment layer of a liquid crystal compound such as a liquid crystalline polymer on the substrate can be preferably used.
In the present embodiment, the optical film 20 is a transparent protective film. The transparent protective film is, for example, a transparent resin film having flexibility. Examples of the material of the transparent protective film include: polyolefins, polyesters, polyamides, polyimides, polyvinylchlorides, polyvinylidene chlorides, celluloses, modified celluloses, polystyrenes, and polycarbonates. Examples of the polyolefin include: cycloolefin polymers (COPs), polyethylene, polypropylene, ethylene-propylene copolymers, ethylene-vinyl acetate copolymers, and ethylene-vinyl alcohol copolymers. Examples of the polyester include: polyethylene terephthalate, polyethylene naphthalate, and polybutylene terephthalate. Examples of the polyamide include: polyamide 6, and partially aromatic polyamide. Examples of the modified cellulose include cellulose triacetate. These materials may be used alone or in combination of two or more. As a material of the transparent protective film, polyolefin is preferably used, and COP is more preferably used from the viewpoint of cleanliness. In addition, the optical film 20 is preferably a uniaxially stretched film or a biaxially stretched film.
From the viewpoint of the strength of the laminated optical film X, the thickness of the optical film 20 is preferably 5 μm or more, more preferably 10 μm or more, and still more preferably 20 μm or more. From the viewpoint of thinning the laminated optical film X, the thickness of the optical film 20 is preferably 100 μm or less, more preferably 70 μm or less, and still more preferably 50 μm or less.
The adhesive layer 30 is a cured product of the adhesive composition. The adhesive layer 30 is directly bonded to the optical film 10 and is directly bonded to the optical film 20. The adhesive composition contains a curable resin, and the components of the adhesive composition are specifically described below.
From the viewpoint of the bonding force between the optical films 10 and 20, the thickness T1 of the adhesive layer 30 is preferably 0.1 μm or more, more preferably 0.4 μm or more, still more preferably 0.7 μm or more, and particularly preferably 0.8 μm or more. From the viewpoint of thinning the laminated optical film X, the thickness T1 of the adhesive layer 30 is preferably 5 μm or less, more preferably 3 μm or less, further preferably 1.5 μm or less, particularly preferably 1 μm or less.
As shown in fig. 2, the adhesive layer 30 has a protruding end portion 30a at least at a part of the peripheral end edge. The protruding end portion 30a is a portion protruding further outward (leftward in fig. 2) than the end edge 11 (1 st end edge) of the optical film 10 or the end edge 21 (2 nd end edge) of the optical film 20 in the plane direction orthogonal to the thickness direction H. In the laminated optical film X, when the exterior member M approaches the laminated optical film X from the outside in the plane direction and collides at a portion where such a protruding end portion 30a exists, for example, as shown in fig. 3, the protruding end portion 30a protruding further to the outside than the optical films 10, 20 receives the collision of the exterior member M. Thereby, further access of the exterior member M is prevented, so that collision of the exterior member M with the end edge 11 of the optical film 10 and the end edge 21 of the optical film 20 can be prevented. Alternatively, even if the exterior member M collides with the end edge 11 and/or the end edge 21, the collision force against these end edges 11, 21 can be relaxed. Such prevention of collision and alleviation of collision force are suitable for suppressing damage to the end portions of the optical films 10, 20 in the laminated optical film X. The adhesive layer 30 of the laminated optical film X has a protruding end portion 30a adapted to suppress generation/propagation of micro cracks at the end portions of the optical films 10, 20.
When the optical film 10 is a polarizer film and the optical film 20 is a transparent protective film, the end edge 11 is preferably located on the outer side in the plane direction than the end edge 21. Such a configuration is preferable for suppressing damage to the end edge 21 of the optical film 20 in the laminated optical film X.
The extension length L1 of the extension end portion 30a in the plane direction from the end edge 11 is preferably 0.01 μm or more, more preferably 0.05 μm or more, still more preferably 0.1 μm, and particularly preferably 0.3 μm or more. Such a configuration is preferable for suppressing damage to the end edge 11 of the optical film 10. The extension length L1 is preferably 8 μm or less, more preferably 5 μm or less, still more preferably 4 μm or less, still more preferably 3 μm or less, and particularly preferably 1 μm or less. Such a configuration is preferable for suppressing occurrence of a residual adhesive at an end portion of the panel due to an excessive adhesive extending at the time of the appearance processing when the laminated optical film X is introduced into a display panel such as a smart phone, and is preferable for suppressing display unevenness caused by the residual adhesive. The extension L1 is specifically the distance in the plane direction between the end edge 11 of the optical film 10 and the end edge 31 of the adhesive layer 30.
The extension length L2 of the extension end portion 30a in the plane direction from the end edge 21 is preferably 0.03 μm or more, more preferably 0.1 μm or more, still more preferably 0.3 μm, and particularly preferably 0.5 μm or more. Such a configuration is preferable for suppressing damage to the end edge 21 of the optical film 20. The extension length L2 is preferably 10 μm or less, more preferably 7 μm or less, still more preferably 5 μm or less, and particularly preferably 3 μm or less. Such a configuration is preferable for suppressing peeling from the adhesive layer 30 at the end edge 21 of the optical film 20. The extension L2 is specifically the distance in the plane direction between the end edge 21 of the optical film 20 and the end edge 31 of the adhesive layer 30.
The ratio (L2/L1) of the extension length L2 to the extension length L1 is preferably 1.1 or more, more preferably 1.5 or more, still more preferably 2 or more, and particularly preferably 2.5 or more. The ratio (L2/L1) is preferably 10 or less, more preferably 8 or less, further preferably 7 or less, particularly preferably 5 or less. These configurations are preferable for both the damage suppression and the peeling suppression described above in the optical films 10, 20.
The indentation elastic modulus (indentation elastic modulus E1) of the adhesive layer 30 at 25 ℃ measured by nanoindentation is preferably 0.5GPa or more, more preferably 1GPa or more, still more preferably 1.5GPa or more, and particularly preferably 2GPa or more. Such a configuration is preferable from the viewpoint of securing the bonding force between the optical films 10, 20. Such a configuration is preferable for securing the above-described collision prevention and collision force alleviation functions of the projecting end portion 30a, and contributes to both the above-described damage suppression and peeling suppression in the optical films 10, 20. The press-in elastic modulus E1 is preferably 7GPa or less, more preferably 5GPa or less, and still more preferably 3GPa or less. Such a configuration is preferable for securing the bendability of the adhesive layer 30 when the laminated optical film X is used in a display panel that can be repeatedly folded (foldable). As a method for adjusting the press-fit elastic modulus of the adhesive layer 30, for example, a method for adjusting the composition of the adhesive composition is mentioned. Specifically, as a method for adjusting the press-in elastic modulus of the adhesive layer 30, it is effective to adjust the number of functional groups of the polymerizable compound, that is, the acrylic equivalent and the epoxy equivalent of the polymerizable compound, in the adhesive composition for forming the adhesive layer 30.
Nanoindentation is a technique for measuring various physical properties of a sample on a nanometer scale. In the present embodiment, the nanoindentation method is performed based on ISO 14577. In the nanoindentation method, a process of pressing a indenter into a sample placed on a stage (load application process) and a process of thereafter pulling out the indenter from the sample (load release process) are performed, and in a series of processes, a load acting between the indenter and the sample and a relative displacement of the indenter with respect to the sample are measured (load-displacement measurement), whereby a load-displacement curve can be obtained. From this load-displacement curve, various physical properties can be obtained on the basis of nanoscale measurement on the measurement sample. For example, a nanoindenter (trade name "Triboindeter", manufactured by Hysicron corporation) may be used for the load-displacement measurement of the cross section of the adhesive layer by nanoindentation, and the examples will be described later.
The indentation elastic modulus (indentation elastic modulus E2) of the adhesive layer 30 at 80 ℃ measured by nanoindentation is preferably 0.05GPa or more, more preferably 0.1GPa or more, still more preferably 0.2GPa or more, and particularly preferably 0.3GPa or more. Such a configuration is preferable for forming the above-described protruding end portion 30a by suppressing thermal shrinkage of the adhesive layer 30 at the time of film profile processing to be described later, in which the temperature of the end portion of the laminated optical film X is raised. From the viewpoint of the processing resistance of the adhesive layer 30, the press-in elastic modulus E2 is preferably 0.7GPa or less, more preferably 0.5GPa or less, and even more preferably 0.4GPa or less.
The modulus of elasticity E1, E2 in indentation preferably satisfies 0.05.ltoreq.E2/E1.ltoreq.0.25. Such a configuration is preferable for forming the above-described protruding end portion 30a by suppressing thermal shrinkage of the adhesive layer 30 at the time of film profile processing to be described later, in which the temperature of the end portion of the laminated optical film X is raised. The value of E2/E1 is more preferably 0.1 or more, still more preferably 0.12 or more, and still more preferably 0.2 or less, still more preferably 0.18 or less.
In the laminated optical film X, the 90 DEG peel strength of the optical film 20 and the optical film 10 at 25℃is preferably 1N/15mm or more, more preferably 1.2N/15mm or more, still more preferably 1.5N/15mm or more. Such a configuration is preferable for achieving a good bonding force between the optical films 10, 20, and particularly preferable for ensuring a bonding force between the optical films 10, 20 for a foldable display panel. The 90 DEG peel strength is, for example, 10N/15mm or less. The 90℃peel strength can be measured, for example, using a Tensilon universal tester (trade name "RTC", manufactured by A & D). In the present measurement, the measurement temperature was set at 25 ℃, the peeling angle was set at 90 °, and the peeling speed was set at 1000 mm/min. Further, as a method for adjusting the 90 ° peel strength, for example, a method for adjusting the composition of the adhesive composition is mentioned. The method for adjusting the 90 ° peel strength includes specifically adjusting the number of functional groups of the polymerizable compound described later in the adhesive composition, that is, adjusting the acrylic equivalent and the epoxy equivalent of the polymerizable compound.
The ratio of the 90 ° peel strength (N/15 mm) to the press-in elastic modulus E2 (GPa) is preferably 5 or more, more preferably 10 or more, still more preferably 15 or more, and further preferably 30 or less, still more preferably 25 or less. Such a configuration is preferable from the viewpoint of the processing resistance of the adhesive layer 30.
The adhesive layer 30 is, for example, a cured product of an adhesive composition (active energy ray-curable composition) containing an active energy ray-curable resin. Examples of the active energy ray-curable composition include: electron beam curable composition, ultraviolet curable composition, and visible light curable composition. In the present embodiment, the active energy ray-curable composition is either one or both of a radical-polymerizable composition and a cationic-polymerizable composition.
When the active energy ray-curable composition is a radical-polymerizable composition, the composition contains a radical-polymerizable compound as a monomer. The radical polymerizable compound is a compound having a radical polymerizable functional group. Examples of the radical polymerizable functional group include a group containing an ethylenically unsaturated bond. Examples of the group containing an ethylenic unsaturated bond include: (meth) acryl, vinyl and allyl. (meth) acryl means acryl and/or methacryl. From the viewpoint of curability of the active energy ray-curable composition, the active energy ray-curable composition preferably contains a radical-polymerizable compound having a (meth) acryloyl group as a main component, which is the component having the largest content by mass ratio. The proportion of the (meth) acryloyl group-containing radical polymerizable compound in the active energy ray-curable composition is, for example, 50 mass% or more, preferably 70 mass% or more, and more preferably 80 mass% or more. Examples of the radical polymerizable compound include monofunctional radical polymerizable compounds and difunctional or more polyfunctional radical polymerizable compounds.
Examples of the monofunctional radical polymerizable compound include (meth) acrylamide derivatives having a (meth) acrylamide group. As the (meth) acrylamide derivative, there may be mentioned: n-alkyl (meth) acrylamide-containing derivatives, N-hydroxyalkyl (meth) acrylamide-containing derivatives, N-aminoalkyl (meth) acrylamide-containing derivatives, N-alkoxy (meth) acrylamide-containing derivatives, and N-mercaptoalkyl (meth) acrylamide-containing derivatives. Examples of the N-alkyl (meth) acrylamide derivatives include: n-methyl (meth) acrylamide, N-dimethyl (meth) acrylamide, N-diethyl (meth) acrylamide, N-isopropyl (meth) acrylamide, N-butyl (meth) acrylamide, and N-hexyl (meth) acrylamide are preferably used. Examples of the N-hydroxyalkyl (meth) acrylamide-containing derivatives include: n-methylol (meth) acrylamide, N-hydroxyethyl (meth) acrylamide, and N-methylol-N-propyl (meth) acrylamide are preferably used. The (meth) acrylamide derivative may be used alone or in combination of two or more.
Examples of the monofunctional radical polymerizable compound include (meth) acrylic acid derivatives having a (meth) acryloyloxy group. Examples of the (meth) acrylic acid derivative include: alkyl (meth) acrylates, and (meth) acrylic acid derivatives other than alkyl (meth) acrylates. The (meth) acrylic acid derivatives may be used alone or in combination of two or more.
Examples of the alkyl (meth) acrylate include: methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, n-pentyl (meth) acrylate, 2-dimethylbutyl (meth) acrylate, n-hexyl (meth) acrylate, n-octyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, 4-methyl-2-propylpentyl (meth) acrylate, and n-octadecyl (meth) acrylate.
Examples of the (meth) acrylic acid derivative other than the alkyl (meth) acrylate include: cycloalkyl (meth) acrylate, aralkyl (meth) acrylate, hydroxy-containing (meth) acrylic acid derivatives, alkoxy-containing (meth) acrylic acid derivatives, and phenoxy-containing (meth) acrylic acid derivatives. Examples of the cycloalkyl (meth) acrylate include: cyclohexyl (meth) acrylate, and cyclopentyl (meth) acrylate. Examples of the aralkyl (meth) acrylate include: benzyl (meth) acrylate, and 3-phenoxybenzyl (meth) acrylate. Examples of the hydroxyl group-containing (meth) acrylic acid derivative include: 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, 4- (hydroxymethyl) cyclohexyl ] methyl acrylate, and 2-hydroxy-3-phenoxypropyl (meth) acrylate. Examples of the alkoxy group-containing (meth) acrylic acid derivative include: 2-methoxyethyl (meth) acrylate, 2-ethoxyethyl (meth) acrylate, and 3-methoxybutyl (meth) acrylate. Examples of the phenoxy (meth) acrylic acid-containing derivative include: phenoxyethyl (meth) acrylate, and phenoxydiethylene glycol (meth) acrylate. As the (meth) acrylic acid derivative other than the alkyl (meth) acrylate, at least one selected from the group consisting of 3-phenoxybenzyl acrylate, 2-hydroxy-3-phenoxypropyl acrylate, and phenoxydiethylene glycol acrylate is preferably used.
The monofunctional radical polymerizable compound may be a carboxyl group-containing monomer. Examples of the carboxyl group-containing monomer include: (meth) acrylic acid, carboxyethyl acrylate, carboxypentyl acrylate, itaconic acid, maleic acid, fumaric acid, crotonic acid, and methacrylic acid.
The monofunctional radical polymerizable compound may be a lactam-based vinyl monomer. Examples of the lactam-based vinyl monomer include: n-vinyl-2-pyrrolidone, N-vinyl-epsilon-caprolactam, and methyl vinyl pyrrolidone.
Examples of the monofunctional radical polymerizable compound include vinyl monomers having nitrogen-containing heterocycles. Examples of the monomer include: vinyl pyridine, vinyl piperidone, vinyl pyrimidine, vinyl piperazine, vinyl pyrazine, vinyl pyrrole, vinyl imidazole, vinylOxazole, and vinyl morpholine.
Examples of the polyfunctional radical polymerizable compound include tripropylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate, 1, 6-hexanediol di (meth) acrylate, 1, 9-nonanediol di (meth) acrylate, 1, 10-decanediol diacrylate, 2-ethyl-2-butylpropanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate, tricyclodecanedimethanol di (meth) acrylate, cyclotrimethylol propane methylal (meth) acrylate, and di As the alkylene glycol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, and dipentaerythritol hexa (meth) acrylate, tripropylene glycol diacrylate may be preferably used. The polyfunctional radical polymerizable compound may be used alone or in combination of two or more. Multiple onesThe functional radical polymerizable compound functions as a crosslinking agent.
When the active energy ray-curable composition is an ultraviolet-curable composition or a visible light-curable composition, the active energy ray-curable composition preferably contains a photopolymerization initiator. Examples of the photopolymerization initiator include: benzophenone compounds, benzoin ether compounds, and thioxanthone compounds. Examples of the benzophenone compound include: dibenzoyl, benzophenone, benzoyl benzoic acid, and 3,3' -dimethyl-4-methoxybenzophenone. Examples of the benzoin ether compound include: benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, and benzoin butyl ether. Examples of the thioxanthone compound include: thioxanthone, 2-chlorothioxanthone, 2-methylthioxanthone, 2, 4-dimethylthioxanthone, isopropylthioxanthone, 2, 4-dichlorothioxanthone, 2, 4-diethylthioxanthone, 2, 4-diisopropylthioxanthone, and dodecylthioxanthone.
When the active energy ray-curable composition is a visible light-curable composition, a photopolymerization initiator having high sensitivity to light of 380nm or more is preferably used. Examples of such photopolymerization initiators include: 2-methyl-1- (4-methylsulfanylphenyl) -2-morpholinopropan-1-one, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butanone-1, 2- (dimethylamino) -2- [ (4-methylphenyl) methyl ] -1- [4- (4-morpholino) phenyl ] -1-butanone, 2,4, 6-trimethylbenzoyl diphenyl phosphine oxide, bis (2, 4, 6-trimethylbenzoyl) phenylphosphine oxide, bis (. Eta.5-2, 4-cyclopenta-1-yl) bis (2, 6-difluoro-3- (1H-pyrrol-1-yl) phenyl) titanium.
As photopolymerization initiators, preference is given to using 2, 4-diethylthioxanthone and/or 2-methyl-1- (4-methylthiophenyl) -2-morpholinopropane-1-one.
The content of the photopolymerization initiator in the active energy ray-curable composition is preferably 0.1 part by mass or more, more preferably 0.05 part by mass or more, further preferably 0.1 part by mass or more, and further preferably 20 parts by mass or less, more preferably 10 parts by mass or less, further preferably 5 parts by mass or less, based on 100 parts by mass of the curable component (radical-polymerizable compound).
In the case where the active energy ray-curable composition is a cationically polymerizable composition, the composition contains a cationically polymerizable compound as a monomer. The cationically polymerizable compound is a compound having a cationically polymerizable functional group, and includes a monofunctional cationically polymerizable compound having one cationically polymerizable functional group and a multifunctional cationically polymerizable compound having two or more cationically polymerizable functional groups. The monofunctional cation polymerizable compound has a relatively low liquid viscosity, and by blending such a monofunctional cation polymerizable compound into a resin composition, the viscosity of the resin composition can be reduced. In addition, monofunctional cationically polymerizable compounds often have functional groups that exhibit various functions. By blending such a monofunctional cationically polymerizable compound in a resin composition, the resin composition and/or a cured product of the resin composition can exhibit various functions. On the other hand, curing of the resin composition containing the multifunctional cationically polymerizable compound can give a cured product having a 3-dimensional crosslinking unit (the multifunctional cationically polymerizable compound functions as a crosslinking agent), and from such a point of view, it is preferable to use the multifunctional cationically polymerizable compound. When the monofunctional cationically polymerizable compound is used in combination with the polyfunctional cationically polymerizable compound, the amount of the polyfunctional cationically polymerizable compound to 100 parts by mass of the monofunctional cationically polymerizable compound is, for example, 10 parts by mass or more and, for example, 1000 parts by mass or less. Examples of the cationically polymerizable functional group include: epoxy, oxetane, and vinyl ether groups. Examples of the compound having an epoxy group include: aliphatic epoxy compounds, alicyclic epoxy compounds, and aromatic epoxy compounds. As the compound having an epoxy group, an alicyclic epoxy compound is preferably used from the viewpoints of curability and adhesiveness of the cationic polymerizable composition. Examples of the alicyclic epoxy compound include: 3, 4-epoxycyclohexylmethyl-3, 4-epoxycyclohexane carboxylate, or caprolactone modification, trimethylcaprolactone modification, and valerolactone modification of 3, 4-epoxycyclohexylmethyl-3, 4-epoxycyclohexane carboxylate. Examples of the commercially available alicyclic epoxy compound include: CELLOCHODE 2021, CELLOCHODE 2021A, CELLOXIDE 2021P, CELLOXIDE 2081, CELLOCHODE 2083, and CELLOCHODE 2085 (manufactured by DACHINESL CORPORATION, supra), and Cyracure UVR-6105, cyracure UVR-6107, cyracure 30, and R-6110 (manufactured by Dow Chemical Japan Ltd, supra) may be mentioned. From the viewpoints of improvement of curability and reduction of viscosity of the cationic polymerizable composition, it is preferable to use a compound having an oxetanyl group and/or a compound having a vinyl ether group. Examples of the compound having an oxetanyl group include: 3-ethyl-3-hydroxymethyl oxetane, 1, 4-bis [ (3-ethyl-3-oxetanyl) methoxymethyl ] benzene, 3-ethyl-3- (phenoxymethyl) oxetane, bis [ (3-ethyl-3-oxetanyl) methyl ] ether, 3-ethyl-3- (2-ethylhexyloxymethyl) oxetane, and phenol novolac oxetane. Examples of commercial products of the oxetanyl group-containing compound include: ARON OXETANE OXT-101, ARON OXETANE OXT-121, ARON OXETANE OXT-211, ARON OXETANE OXT-221, ARON OXETANE OXT-212 (manufactured by east Asian Synthesis Co., ltd.). Examples of the compound having a vinyl ether group include: 2-hydroxyethyl vinyl ether, diethylene glycol monovinyl ether, 4-hydroxybutyl vinyl ether, diethylene glycol monovinyl ether, triethylene glycol divinyl ether, cyclohexanedimethanol monovinyl ether, tricyclodecane vinyl ether, cyclohexyl vinyl ether, methoxyethyl vinyl ether, ethoxyethyl vinyl ether, and pentaerythritol-type tetravinyl ether.
In the case where the active energy ray-curable composition is an ultraviolet-curable composition or a visible light-curable composition, the active energy ray-curable composition contains a photo-cationic polymerization initiator. The photo-cationic polymerization initiator is irradiated with active energy rays (visible light, ultraviolet rays, X-rays, electron beams, etc.) to generate a cationic species or lewis acid, thereby initiating polymerization of the cationically polymerizable functional group. The photo cation polymerization initiator may be a photoacid generator or a photobase generator, and preferably a photoacid generator is used. When the active energy ray-curable composition is a visible light-curable composition, it is particularly preferable to use a photo-cationic polymerization initiator having high sensitivity to light of 380nm or more. In addition, in the case of using a photo-cationic polymerization initiator, it is preferable to use a photosensitizer exhibiting a great absorption for light of a wavelength longer than 380nm in combination. The photo-cationic polymerization initiator is a compound that generally exhibits a great absorption in a wavelength region around 300nm or shorter than 300nm, and therefore, by using a photosensitizer exhibiting a great absorption at a light longer than 380nm in combination, it is possible to efficiently utilize a light longer than 380nm to promote the generation of a cationic species or a lewis acid from the photo-cationic polymerization initiator. Examples of the photosensitizer include: the anthracene compound, pyrene compound, carbonyl compound, organosulfur compound, persulfate, redox compound, azo compound, diazo compound, halogen compound, and photoreductive pigment may be used alone or in combination of two or more. In particular, an anthracene compound is preferable because of excellent photosensitizing effect. Examples of commercial products of anthracene compounds used as photosensitizers include: anthracure UVS-1331 and Anthracure UVS-1221 (manufactured by Kawasaki chemical Co., ltd.). The content of the photosensitizer in the composition is, for example, 0.1 to 5% by weight.
The active energy ray-curable composition may contain an oligomer. The oligomer may be an acrylic oligomer, a fluorine oligomer, or a silicone oligomer, and an acrylic oligomer may be preferably used. The incorporation of an oligomer into an active energy ray-curable composition contributes to suppression of shrinkage of the composition upon curing. The suppression of the curing shrinkage of the active energy ray-curable composition is preferable for reducing the interfacial stress between the formed adhesive layer 30 and the optical films 10, 20, and the suppression of the interfacial stress helps to ensure the bonding force between the optical films 10, 20.
Examples of the (meth) acrylic monomer that forms the acrylic oligomer include: alkyl (meth) acrylates having 1 to 20 carbon atoms, cycloalkyl (meth) acrylates, aralkyl (meth) acrylates, polycyclic (meth) acrylates, hydroxyl-containing (meth) acrylates, and halogen-containing (meth) acrylates. Examples of the alkyl (meth) acrylate include: methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, 2-methyl-2-nitropropyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, sec-butyl (meth) acrylate, tert-butyl (meth) acrylate, n-pentyl (meth) acrylate, tert-pentyl (meth) acrylate, 3-pentyl (meth) acrylate, 2-dimethylbutyl (meth) acrylate, n-hexyl (meth) acrylate, cetyl (meth) acrylate, n-octyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, 4-methyl-2-propylpentyl (meth) acrylate, and n-octadecyl (meth) acrylate. Examples of the cycloalkyl (meth) acrylate include: cyclohexyl (meth) acrylate, and cyclopentyl (meth) acrylate. Examples of the aralkyl (meth) acrylate include benzyl (meth) acrylate. Examples of the polycyclic (meth) acrylate include: 2-isobornyl (meth) acrylate, 2-norbornyl methyl (meth) acrylate, 5-norbornen-2-ylmethyl (meth) acrylate, and 3-methyl-2-norbornyl methyl (meth) acrylate. Examples of the hydroxyl group-containing (meth) acrylate include: hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 2, 3-dihydroxypropyl methyl butyl (meth) acrylate. Examples of the halogen-containing (meth) acrylate include: 2, 2-trifluoroethyl (meth) acrylate, 2-trifluoroethyl (meth) acrylate, tetrafluoropropyl (meth) acrylate, hexafluoropropyl (meth) acrylate, octafluoropentanyl (meth) acrylate, heptadecafluorodecyl (meth) acrylate. These (meth) acrylates may be used alone or in combination of two or more.
The weight average molecular weight (Mw) of the acrylic oligomer is preferably 15000 or less, more preferably 10000 or less, and further preferably 5000 or less. The Mw of the acrylic oligomer is preferably 500 or more, more preferably 1000 or more, and further preferably 1500 or more.
The content of the acrylic oligomer in the active energy ray-curable composition is preferably 2% by mass or more, more preferably 4% by mass or more, and further preferably 20% by mass or less, more preferably 15% by mass or less.
The active energy ray-curable composition may contain other components. The other components include a silane coupling agent, a leveling agent, a surfactant, a plasticizer, and an ultraviolet absorber. The blending amount of the other component is preferably 10 parts by mass or less, more preferably 5 parts by mass or less, still more preferably 3 parts by mass or less, and further, for example, 0.01 parts by mass or more, relative to 100 parts by mass of the curable component.
From the viewpoint of coatability in a coating step described later, the viscosity of the active energy ray-curable composition at 25 ℃ is preferably 3mpa·s or more, more preferably 5mpa·s or more, further preferably 10mpa·s or more, and further preferably 100mpa·s or less, more preferably 50mpa·s or less, further preferably 30mpa·s or less. The viscosity of the composition was measured by an E-type viscometer (cone-plate type viscometer).
The laminated optical film X can be manufactured as follows, for example.
First, an active energy ray-curable composition is applied to one surface (a surface to be bonded) of one optical film (optical film 10 or optical film 20), and a coating film of the composition is formed (coating step). Before the coating step, the surface of the optical film to be bonded may be subjected to a surface modification treatment. Examples of the surface modification treatment include corona treatment, plasma treatment, excimer treatment, and flame treatment. Examples of the coating method in this step include: reverse coating, gravure coating, bar reverse coating, roll coating, die coating, wire bar coating, and bar coating.
Next, one optical film (optical film 20 or optical film 10) is laminated to the other optical film via the composition coating film, and a roll laminator may be used for lamination.
Next, the composition coating film between the optical films 10, 20 is irradiated with an active energy ray, and the coating film (active energy ray-curable composition) is cured, thereby forming the adhesive layer 30 (the adhesive layer 30 is not a pressure-sensitive adhesive layer). Thus, the optical films 10 and 20 are bonded via the adhesive layer 30, and a raw material film of the laminated optical film X is obtained. In this step, from the viewpoint of suppressing deterioration of the optical film 10 as a functional optical film, it is preferable to irradiate active energy rays from the optical film 30 side. As the active energy ray, electron beam, ultraviolet ray, and visible light can be used. Examples of the electron beam irradiation device include an electron beam accelerator. Examples of the light source for ultraviolet light and visible light include: LED lamps, gallium-enclosed metal halide lamps, low-pressure mercury lamps, medium-pressure mercury lamps, high-pressure mercury lamps, ultrahigh-pressure mercury lamps, xenon lamps, halogen lamps, and gallium lamps. In this step, a wavelength blocking filter for blocking light in a partial wavelength range of ultraviolet light and/or visible light emitted from the light source may be used as necessary.
Next, at least a part of the peripheral end portion of the raw material film is subjected to an outline processing (outline processing step), for example, one end portion in the longitudinal direction of the rolled raw material film is subjected to a trimming processing, for example, the rolled raw material film is cut into a single sheet shape. Examples of the method of forming the outer shape include: by CO 2 Laser processing such as laser irradiation, cutting by a blanking cutter, and end milling. The optical films 10 and 20 undergo relatively large heat shrinkage at the outline processing portion of the raw material film, forming the projecting end portion 30a. Specifically, in order to retract the end edges 11, 21 of the optical films 10, 20 from the end edge 31 of the adhesive layer 30 to the inside in the plane direction at the end of the raw material film, the end portions of the optical films 10, 20 are contracted to form the projecting end portion 30a. The length of the shrinkage of the end portions of the optical films 10, 20, that is, the extension lengths L1, L2 of the extension end portions 30a, can be adjusted by adjusting the material (dimensional shrinkage) and thickness of the optical films 10, 20, and the processing conditions. Examples of the processing conditions include adjustment of stretch ratio.
For example, the laminated optical film X can be manufactured as described above.
Examples
The present invention will be specifically described with reference to examples, but the present invention is not limited to the examples. The specific numerical values such as the blending amount (content), physical property value, and parameter described below may be replaced with the upper limit (numerical value defined in the form of "below" or "less") or the lower limit (numerical value defined in the form of "above" or "exceeding") of the blending amount (content), physical property value, and parameter described in the above-described "specific embodiment" corresponding thereto.
[ example 1 ]
The following components were mixed at 25℃for 1 hour to prepare an adhesive composition (preparation step).
45 parts by mass of 3-phenoxybenzyl acrylate (trade name "LIGHT ACRYLATE POB-A", monomer, co-Rong chemical Co., ltd.)
25 parts by mass of phenoxydiethylene glycol acrylate (trade name "LIGHT ACRYLATEP H-A", monomer, co-Rong chemical Co., ltd.)
15 parts by mass of tripropylene glycol diacrylate (trade name "Aronix M-220", monomer, manufactured by Toyama Synthesis Co., ltd.)
10 parts by mass of 2-hydroxy-3-phenoxypropyl acrylate (trade name "Aronix M-5700", monomer, manufactured by Toyama Synthesis Co., ltd.)
5 parts by mass of hydroxyethylacrylamide (trade name "HEAA", monomer, KJ chemical Co., ltd.)
5 parts by mass of diethylacrylamide (trade name "DEAA", monomer, KJ chemical Co., ltd.)
3 parts by mass of 2-methyl-1- (4-methylthiophenyl) -2-morpholinopropan-1-one (trade name "OMINIRAD907", photopolymerization initiator, manufactured by IGM Resins Co., ltd.)
3 parts by mass of 2, 4-diethylthioxanthone (trade name "KAYACURE DETX-S", photopolymerization initiator, manufactured by Nippon Kagaku Co., ltd.)
5 parts by mass of an acrylic oligomer (trade name "Arufon 1190", viscosity 6000 mPas (25 ℃ C.), mw1700, tg-50 ℃ C., manufactured by Toyama Synthesis Co., ltd.)
0.5 part by mass of modified polydimethylsiloxane having acryl groups (trade name "BYK-UV3505", leveling agent, manufactured by BYK Co., ltd.)
Next, as a matter of courseAn adhesive composition was applied to a COP Film (trade name "ZEONOR Film ZF14", manufactured by Japanese patent application No. Weng Zhushi Co., ltd.) having a thickness of 23 μm of the transparent protective Film, to form an adhesive coating Film having a thickness of 1. Mu.m. The coating was performed using an MCD coater (manufactured by Fuji mechanical Co., ltd.) (cell shape: honeycomb, number of gravure roll lines 1000/inch, rotational speed 140%/line speed). Next, a polarizer film is bonded to the transparent protective film via an adhesive coating film on the film. Next, the adhesive coating film between the films is cured by irradiating ultraviolet rays to the adhesive coating film from the transparent protective film side. Ultraviolet irradiation was performed using an ultraviolet irradiation device (trade name "Light HAMMER10", valve: V valve, fusion UV Systems, manufactured by Inc corporation) having a metal halide lamp in which gallium is enclosed as a Light source. In the ultraviolet irradiation, the peak illuminance was set to 1600mW/cm 2 Setting the cumulative irradiation amount to 1000mJ/cm 2 (wavelength 380 to 440 nm) (illuminance was measured using a "Sola-Check System" manufactured by Solatell Co.). Thus, the transparent conductive film and the polarizer film were bonded to obtain a laminated optical film.
Next, the laminated optical film is subjected to an outline processing (outline processing step). Specifically, by CO 2 The laminated optical film was cut in the thickness direction by irradiation with laser light, and a laminated optical film having a predetermined planar shape was obtained. In CO 2 In the laser irradiation, the wavelength was set to 9.4 μm, the output power was set to 48W, and the scanning speed was set to 500 mm/sec. Next, the laminated optical film was left at room temperature for 24 hours.
The laminated optical film of example 1 was produced as described above. The laminated optical film of example 1 includes a polarizer film (thickness 5 μm), an adhesive layer, and a transparent protective film (thickness 23 μm) in this order in the thickness direction.
[ example 2 ]
A laminated optical film (polarizer film/adhesive layer/transparent protective film) of example 2 was produced in the same manner as the laminated optical film of example 1 except for the following operations. In the production step, the amount of "Aronix M-220" was 5 parts by mass instead of 15 parts by mass, and the thickness of the adhesive layer coating film formed on the transparent protective film was 1. Mu.m.
[ example 3 ]
A laminated optical film of example 3 (polarizer film/2 nd adhesive layer/transparent protective film) was produced in the same manner as the laminated optical film of example 1, except for the following operations.
In the preparation step, the amount of "LIGHT ACRYLATE POB-A" was 43 parts by mass, the amount of "LIGHT ACRYLATE P H-A" was 29 parts by mass, the amount of "AronixM-220" was 3 parts by mass, and the thickness of the adhesive layer coating film formed on the transparent protective film in the coating step was 1. Mu.m.
Comparative example 1
A laminated optical film (polarizer film/adhesive layer/transparent protective film) of comparative example 1 was produced in the same manner as the laminated optical film of example 1 except for the following operations.
In the preparation step, 36 parts by mass of "LIGHT ACRYLATE1.9ND-A" (1, 9-nonanediol diacrylate) made by Kagaku chemical Co., ltd.) and 12.5 parts by mass of "LIGHT ACRYLATE HPP-A" (hydroxypivalic acid neopentyl glycol acrylic acid adduct) made by Kagaku chemical Co., ltd were used instead of "LIGHT ACRYLATE POB-A" and "LIGHT ACRYLATE P H-A", and "Aronix M-220" was not used, the amount of "Aronix M-5700" was 22 parts by mass, the amount of "HEAA" was 12.5 parts by mass, the amount of "DEAA" was 6 parts by mass, the amount of "HEAA" was 12.5 parts by mass, and the amount of "Arufon 1190" was 10 parts by mass.
End observation
The longitudinal sectional shapes of the end portions of the laminated optical films of examples 1 to 3 and comparative example 1 were examined. First, a portion arbitrarily selected from the peripheral end portions of the laminated optical film is cut in the thickness direction, thereby forming a vertical section for observation. Then, the longitudinal section was observed and photographed by an optical microscope. Then, it was confirmed in each observation section that the adhesive layer had a portion (protruding end) protruding further outward in the film surface direction than the end edge (1 st end edge) of the polarizer film and the end edge (2 nd end edge) of the transparent protective film. The extension length L1 of the extension end portion in the plane direction from the 1 st end edge and the extension length L2 of the extension end portion in the plane direction from the 2 nd end edge were measured in the respective observation cross sections. The results are shown in Table 1.
In addition, regarding suppression of damage to the laminated optical film, the case where damage (such as cracks and defects) does not occur to both the polarizing film and the transparent protective film in the above-described observation cross section was evaluated as "good", and the case where damage occurred to at least one of the polarizing film and the transparent protective film was evaluated as "bad", and the evaluation was performed on the basis of the above-described criteria. The results are shown in Table 1.
Press-in elastic modulus
The indentation elastic modulus of the adhesive layer in each of the laminated optical films of examples 1 to 3 and comparative example 1 was measured by nanoindentation (1 st elastic modulus measurement). Specifically, first, a film sheet (laminated optical film) having a size of 5mm×10mm is cut out from the laminated optical film; next, the laminated optical film was cut by a freeze-slicing method, specifically, the laminated optical film was cooled to-30 ℃, and then cut with a hard knife along the thickness direction of the film, and then returned to room temperature, thereby obtaining a sample for measurement. Next, load-displacement measurement of the exposed surface of the adhesive layer of the measurement sample was performed by using a nanoindenter (trade name "TI950 triboindenor", manufactured by Hysitron corporation) based on JIS Z2255:2003, and a load-displacement curve was obtained. In this measurement, the measurement mode was set to a single press-in measurement, the measurement temperature was set to 25 ℃, the used indenter was set to a Berkovich (triangular pyramid) diamond indenter, the maximum press-in depth (maximum displacement hmax) of the indenter to the measurement sample during load application was set to 50nm, the press-in speed of the indenter was set to 10 nm/sec, and the pull-out speed of the indenter from the measurement sample during load release was set to 10 nm/sec. The resulting measurement data were then processed by dedicated analytical software (ver.9.4.0.1) of "TI950 triboindanter". Specifically, based on the obtained load (f) -displacement (h) curve, the maximum load fmax (load acting on the indenter at the maximum displacement hmax), the contact projected area S (indenter at the maximum load and the specimen) were obtained Projected area of the contact area therebetween), and the slope D of the tangent to the load-displacement curve at the start of the load-release process. Then, the indentation elastic modulus (= (pi) of the adhesive layer was calculated from the slope D and the contact projection area S 1/2 D)/(2S 1/2 ) Table 1 shows the values as the indentation elastic modulus E1 (GPa).
The press-in elastic modulus (measurement of the 2 nd elastic modulus) at 80℃was measured for the adhesive layers in the laminated optical films of examples 1 to 3 and comparative example 1 in the same manner as in the measurement of the 1 st elastic modulus except that the measurement temperature was 80℃instead of 25℃and the values are shown in Table 1 as the press-in elastic modulus E2 (GPa). Table 1 also shows the ratio (E2/E1) of the press-in elastic modulus E2 at 80℃to the press-in elastic modulus E1 at 25 ℃.
Industrial applicability
The laminated optical film of the present invention can be used as an element contained in a laminated structure of a display panel such as a foldable display panel.
Claims (5)
1. A laminated optical film comprising, in order in the thickness direction, a 1 st optical film, an adhesive layer, and a 2 nd optical film,
the adhesive layer is bonded to the 1 st optical film and bonded to the 2 nd optical film,
the adhesive layer has a protruding end portion that protrudes further outward than the 1 st end edge of the 1 st optical film and the 2 nd end edge of the 2 nd optical film in a plane direction orthogonal to the thickness direction.
2. The laminated optical film according to claim 1, wherein,
the 1 st optical film is a polarizer film, and in the plane direction, the 1 st end edge is located further outside the 2 nd end edge.
3. The laminated optical film according to claim 1, wherein,
in the plane direction, the protruding length of the protruding end portion from the 1 st end edge is 0.01 μm or more and 5 μm or less.
4. The laminated optical film according to claim 1, wherein,
in the plane direction, the protruding length of the protruding end portion from the 2 nd end edge is 0.03 μm or more and 10 μm or less.
5. The laminated optical film according to any one of claims 1 to 4, wherein,
the adhesive layer has a press-in elastic modulus E1 at 25 ℃ and the adhesive layer has a press-in elastic modulus E2 at 80 ℃ that satisfy 0.05-E2/E1-0.25.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021-077102 | 2021-04-30 | ||
| JP2021077102 | 2021-04-30 | ||
| PCT/JP2022/018916 WO2022230889A1 (en) | 2021-04-30 | 2022-04-26 | Multilayer optical film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117042961A true CN117042961A (en) | 2023-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202280022932.9A Pending CN117042961A (en) | 2021-04-30 | 2022-04-26 | Laminated optical film |
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| Country | Link |
|---|---|
| JP (1) | JPWO2022230889A1 (en) |
| KR (1) | KR20240002732A (en) |
| CN (1) | CN117042961A (en) |
| TW (1) | TW202308845A (en) |
| WO (1) | WO2022230889A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4356788B2 (en) * | 2007-03-13 | 2009-11-04 | エプソントヨコム株式会社 | Optical element, optical low-pass filter, solid-state imaging device |
| WO2013114612A1 (en) * | 2012-02-03 | 2013-08-08 | 住友化学株式会社 | Polarizing laminated film and production method therefor |
| JP6275945B2 (en) * | 2012-12-10 | 2018-02-07 | 日東電工株式会社 | Optical film with double-sided pressure-sensitive adhesive, and method for manufacturing an image display device using the same |
| JP6420747B2 (en) * | 2015-04-17 | 2018-11-07 | 日東電工株式会社 | Polarizer, polarizing plate, and method for producing polarizer |
| JP6647753B2 (en) * | 2015-04-17 | 2020-02-14 | 日東電工株式会社 | Polarizing plate and manufacturing method thereof |
| JP6096350B2 (en) * | 2015-07-07 | 2017-03-15 | 住友化学株式会社 | Manufacturing method of polarizing plate |
| JP6806453B2 (en) * | 2016-03-17 | 2021-01-06 | 日東電工株式会社 | A method for manufacturing a single-protective polarizing film with a transparent resin layer, a method for manufacturing a polarizing film with an adhesive layer, and a method for manufacturing an optical laminate. |
| JP2018159911A (en) * | 2017-01-27 | 2018-10-11 | 住友化学株式会社 | Polarizing plate and image display device |
| JP7137900B2 (en) | 2018-02-26 | 2022-09-15 | 日東電工株式会社 | Active energy ray-curable adhesive composition, polarizing film and method for producing same, optical film, and image display device |
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2022
- 2022-04-26 CN CN202280022932.9A patent/CN117042961A/en active Pending
- 2022-04-26 JP JP2023517565A patent/JPWO2022230889A1/ja active Pending
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- 2022-04-26 KR KR1020237027590A patent/KR20240002732A/en unknown
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| JPWO2022230889A1 (en) | 2022-11-03 |
| WO2022230889A1 (en) | 2022-11-03 |
| KR20240002732A (en) | 2024-01-05 |
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