WO2012118185A1 - 偏光フィルムの製造方法、偏光フィルム用ポリビニルアルコール系樹脂、偏光フィルム用ポリビニルアルコール系樹脂溶液、偏光フィルム及び偏光板 - Google Patents
偏光フィルムの製造方法、偏光フィルム用ポリビニルアルコール系樹脂、偏光フィルム用ポリビニルアルコール系樹脂溶液、偏光フィルム及び偏光板 Download PDFInfo
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- WO2012118185A1 WO2012118185A1 PCT/JP2012/055397 JP2012055397W WO2012118185A1 WO 2012118185 A1 WO2012118185 A1 WO 2012118185A1 JP 2012055397 W JP2012055397 W JP 2012055397W WO 2012118185 A1 WO2012118185 A1 WO 2012118185A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- polarizing film
- film
- polyvinyl alcohol
- polarizing
- based resin
- Prior art date
Links
- 229920005989 resin Polymers 0.000 title claims abstract description 185
- 239000011347 resin Substances 0.000 title claims abstract description 185
- 229920002451 polyvinyl alcohol Polymers 0.000 title claims abstract description 181
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 28
- -1 poly(vinyl alcohol) Polymers 0.000 title abstract description 16
- 238000004043 dyeing Methods 0.000 claims abstract description 67
- 238000007127 saponification reaction Methods 0.000 claims abstract description 39
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 38
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 174
- 239000002904 solvent Substances 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 238000001035 drying Methods 0.000 claims description 14
- 229920002554 vinyl polymer Polymers 0.000 claims description 11
- 238000005266 casting Methods 0.000 claims description 10
- 238000010186 staining Methods 0.000 claims description 5
- 239000000243 solution Substances 0.000 description 32
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 description 18
- 230000010287 polarization Effects 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 14
- 239000000975 dye Substances 0.000 description 13
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 12
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 9
- 150000005846 sugar alcohols Polymers 0.000 description 9
- 229920001567 vinyl ester resin Polymers 0.000 description 9
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 8
- 239000007864 aqueous solution Substances 0.000 description 8
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 8
- 239000004327 boric acid Substances 0.000 description 8
- 239000011248 coating agent Substances 0.000 description 8
- 238000000576 coating method Methods 0.000 description 8
- 239000000178 monomer Substances 0.000 description 7
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 6
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 6
- 235000011187 glycerol Nutrition 0.000 description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 5
- UNPLRYRWJLTVAE-UHFFFAOYSA-N Cloperastine hydrochloride Chemical compound Cl.C1=CC(Cl)=CC=C1C(C=1C=CC=CC=1)OCCN1CCCCC1 UNPLRYRWJLTVAE-UHFFFAOYSA-N 0.000 description 4
- 239000004014 plasticizer Substances 0.000 description 4
- 230000000379 polymerizing effect Effects 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 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 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 229920002284 Cellulose triacetate Polymers 0.000 description 3
- IMROMDMJAWUWLK-UHFFFAOYSA-N Ethenol Chemical group OC=C IMROMDMJAWUWLK-UHFFFAOYSA-N 0.000 description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 3
- 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 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 229940105990 diglycerin Drugs 0.000 description 3
- GPLRAVKSCUXZTP-UHFFFAOYSA-N diglycerol Chemical compound OCC(O)COCC(O)CO GPLRAVKSCUXZTP-UHFFFAOYSA-N 0.000 description 3
- 230000001965 increasing effect Effects 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 3
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical group [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- DKNPRRRKHAEUMW-UHFFFAOYSA-N Iodine aqueous Chemical compound [K+].I[I-]I DKNPRRRKHAEUMW-UHFFFAOYSA-N 0.000 description 2
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical compound CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
- 238000010306 acid treatment Methods 0.000 description 2
- 150000001336 alkenes Chemical class 0.000 description 2
- ZADPBFCGQRWHPN-UHFFFAOYSA-N boronic acid Chemical compound OBO ZADPBFCGQRWHPN-UHFFFAOYSA-N 0.000 description 2
- 229920001727 cellulose butyrate Polymers 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- FJKIXWOMBXYWOQ-UHFFFAOYSA-N ethenoxyethane Chemical compound CCOC=C FJKIXWOMBXYWOQ-UHFFFAOYSA-N 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 230000003100 immobilizing effect Effects 0.000 description 2
- 239000011630 iodine Substances 0.000 description 2
- 229910052740 iodine Inorganic materials 0.000 description 2
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000002685 polymerization catalyst Substances 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 2
- NOBYOEQUFMGXBP-UHFFFAOYSA-N (4-tert-butylcyclohexyl) (4-tert-butylcyclohexyl)oxycarbonyloxy carbonate Chemical compound C1CC(C(C)(C)C)CCC1OC(=O)OOC(=O)OC1CCC(C(C)(C)C)CC1 NOBYOEQUFMGXBP-UHFFFAOYSA-N 0.000 description 1
- UZKWTJUDCOPSNM-UHFFFAOYSA-N 1-ethenoxybutane Chemical compound CCCCOC=C UZKWTJUDCOPSNM-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
- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-UHFFFAOYSA-N 0.000 description 1
- ZACVGCNKGYYQHA-UHFFFAOYSA-N 2-ethylhexoxycarbonyloxy 2-ethylhexyl carbonate Chemical compound CCCCC(CC)COC(=O)OOC(=O)OCC(CC)CCCC ZACVGCNKGYYQHA-UHFFFAOYSA-N 0.000 description 1
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 1
- STOOUUMSJPLRNI-UHFFFAOYSA-N 5-amino-4-hydroxy-3-[[4-[4-[(4-hydroxyphenyl)diazenyl]phenyl]phenyl]diazenyl]-6-[(4-nitrophenyl)diazenyl]naphthalene-2,7-disulfonic acid Chemical compound OS(=O)(=O)C1=CC2=CC(S(O)(=O)=O)=C(N=NC=3C=CC(=CC=3)C=3C=CC(=CC=3)N=NC=3C=CC(O)=CC=3)C(O)=C2C(N)=C1N=NC1=CC=C([N+]([O-])=O)C=C1 STOOUUMSJPLRNI-UHFFFAOYSA-N 0.000 description 1
- OZAIFHULBGXAKX-VAWYXSNFSA-N AIBN Substances N#CC(C)(C)\N=N\C(C)(C)C#N OZAIFHULBGXAKX-VAWYXSNFSA-N 0.000 description 1
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- OSDWBNJEKMUWAV-UHFFFAOYSA-N Allyl chloride Chemical compound ClCC=C OSDWBNJEKMUWAV-UHFFFAOYSA-N 0.000 description 1
- UUPWEGAONCOIFJ-UHFFFAOYSA-N CCCCC(CC)COC(=O)OOC(O)=O Chemical compound CCCCC(CC)COC(=O)OOC(O)=O UUPWEGAONCOIFJ-UHFFFAOYSA-N 0.000 description 1
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- GYCMBHHDWRMZGG-UHFFFAOYSA-N Methylacrylonitrile Chemical compound CC(=C)C#N GYCMBHHDWRMZGG-UHFFFAOYSA-N 0.000 description 1
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 description 1
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 1
- WHNWPMSKXPGLAX-UHFFFAOYSA-N N-Vinyl-2-pyrrolidone Chemical compound C=CN1CCCC1=O WHNWPMSKXPGLAX-UHFFFAOYSA-N 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- UWHCKJMYHZGTIT-UHFFFAOYSA-N Tetraethylene glycol, Natural products OCCOCCOCCOCCO UWHCKJMYHZGTIT-UHFFFAOYSA-N 0.000 description 1
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- QYKIQEUNHZKYBP-UHFFFAOYSA-N Vinyl ether Chemical class C=COC=C QYKIQEUNHZKYBP-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000003926 acrylamides Chemical class 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 150000001639 boron compounds Chemical class 0.000 description 1
- QTLFSHMBAYHDCO-UHFFFAOYSA-N butan-2-yl carboxyoxy carbonate Chemical compound CCC(C)OC(=O)OOC(O)=O QTLFSHMBAYHDCO-UHFFFAOYSA-N 0.000 description 1
- ZGPBOPXFOJBLIV-UHFFFAOYSA-N butoxycarbonyloxy butyl carbonate Chemical compound CCCCOC(=O)OOC(=O)OCCCC ZGPBOPXFOJBLIV-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007607 die coating method Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- DSARWKALPGYFTA-UHFFFAOYSA-L disodium 4-hydroxy-7-[(5-hydroxy-6-phenyldiazenyl-7-sulfonatonaphthalen-2-yl)carbamoylamino]-3-phenyldiazenylnaphthalene-2-sulfonate Chemical compound [Na+].[Na+].[O-]S(=O)(=O)C1=CC2=CC(NC(=O)NC=3C=C4C=C(C(N=NC=5C=CC=CC=5)=C(O)C4=CC=3)S([O-])(=O)=O)=CC=C2C(O)=C1N=NC1=CC=CC=C1 DSARWKALPGYFTA-UHFFFAOYSA-L 0.000 description 1
- NJDNXYGOVLYJHP-UHFFFAOYSA-L disodium;2-(3-oxido-6-oxoxanthen-9-yl)benzoate Chemical compound [Na+].[Na+].[O-]C(=O)C1=CC=CC=C1C1=C2C=CC(=O)C=C2OC2=CC([O-])=CC=C21 NJDNXYGOVLYJHP-UHFFFAOYSA-L 0.000 description 1
- VTEBSADXXKSKOE-UHFFFAOYSA-L disodium;4-[[2,4-diamino-5-[[3-[[2,4-diamino-5-[(4-sulfonatophenyl)diazenyl]phenyl]diazenyl]phenyl]diazenyl]phenyl]diazenyl]benzenesulfonate Chemical compound [Na+].[Na+].NC1=CC(N)=C(N=NC=2C=C(C=CC=2)N=NC=2C(=CC(N)=C(N=NC=3C=CC(=CC=3)S([O-])(=O)=O)C=2)N)C=C1N=NC1=CC=C(S([O-])(=O)=O)C=C1 VTEBSADXXKSKOE-UHFFFAOYSA-L 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- UYMKPFRHYYNDTL-UHFFFAOYSA-N ethenamine Chemical class NC=C UYMKPFRHYYNDTL-UHFFFAOYSA-N 0.000 description 1
- YCUBDDIKWLELPD-UHFFFAOYSA-N ethenyl 2,2-dimethylpropanoate Chemical compound CC(C)(C)C(=O)OC=C YCUBDDIKWLELPD-UHFFFAOYSA-N 0.000 description 1
- MEGHWIAOTJPCHQ-UHFFFAOYSA-N ethenyl butanoate Chemical compound CCCC(=O)OC=C MEGHWIAOTJPCHQ-UHFFFAOYSA-N 0.000 description 1
- GLVVKKSPKXTQRB-UHFFFAOYSA-N ethenyl dodecanoate Chemical compound CCCCCCCCCCCC(=O)OC=C GLVVKKSPKXTQRB-UHFFFAOYSA-N 0.000 description 1
- GFJVXXWOPWLRNU-UHFFFAOYSA-N ethenyl formate Chemical compound C=COC=O GFJVXXWOPWLRNU-UHFFFAOYSA-N 0.000 description 1
- AFSIMBWBBOJPJG-UHFFFAOYSA-N ethenyl octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OC=C AFSIMBWBBOJPJG-UHFFFAOYSA-N 0.000 description 1
- UIWXSTHGICQLQT-UHFFFAOYSA-N ethenyl propanoate Chemical compound CCC(=O)OC=C UIWXSTHGICQLQT-UHFFFAOYSA-N 0.000 description 1
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 238000007756 gravure coating Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- QWVBGCWRHHXMRM-UHFFFAOYSA-N hexadecoxycarbonyloxy hexadecyl carbonate Chemical compound CCCCCCCCCCCCCCCCOC(=O)OOC(=O)OCCCCCCCCCCCCCCCC QWVBGCWRHHXMRM-UHFFFAOYSA-N 0.000 description 1
- 229940077844 iodine / potassium iodide Drugs 0.000 description 1
- 238000010030 laminating Methods 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
- 239000000463 material Substances 0.000 description 1
- FQPSGWSUVKBHSU-UHFFFAOYSA-N methacrylamide Chemical compound CC(=C)C(N)=O FQPSGWSUVKBHSU-UHFFFAOYSA-N 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- XJRBAMWJDBPFIM-UHFFFAOYSA-N methyl vinyl ether Chemical compound COC=C XJRBAMWJDBPFIM-UHFFFAOYSA-N 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
- 239000012046 mixed solvent Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229940088644 n,n-dimethylacrylamide Drugs 0.000 description 1
- YLGYACDQVQQZSW-UHFFFAOYSA-N n,n-dimethylprop-2-enamide Chemical compound CN(C)C(=O)C=C YLGYACDQVQQZSW-UHFFFAOYSA-N 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- SWPMNMYLORDLJE-UHFFFAOYSA-N n-ethylprop-2-enamide Chemical compound CCNC(=O)C=C SWPMNMYLORDLJE-UHFFFAOYSA-N 0.000 description 1
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- HVAMZGADVCBITI-UHFFFAOYSA-M pent-4-enoate Chemical compound [O-]C(=O)CCC=C HVAMZGADVCBITI-UHFFFAOYSA-M 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- BYYYEOMMIGRDST-UHFFFAOYSA-N prop-1-ynyl acetate Chemical compound CC#COC(C)=O BYYYEOMMIGRDST-UHFFFAOYSA-N 0.000 description 1
- YPVDWEHVCUBACK-UHFFFAOYSA-N propoxycarbonyloxy propyl carbonate Chemical compound CCCOC(=O)OOC(=O)OCCC YPVDWEHVCUBACK-UHFFFAOYSA-N 0.000 description 1
- WPPDXAHGCGPUPK-UHFFFAOYSA-N red 2 Chemical compound C1=CC=CC=C1C(C1=CC=CC=C11)=C(C=2C=3C4=CC=C5C6=CC=C7C8=C(C=9C=CC=CC=9)C9=CC=CC=C9C(C=9C=CC=CC=9)=C8C8=CC=C(C6=C87)C(C=35)=CC=2)C4=C1C1=CC=CC=C1 WPPDXAHGCGPUPK-UHFFFAOYSA-N 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- BQHRKYUXVHKLLZ-UHFFFAOYSA-M sodium 7-amino-2-[[4-[(4-aminophenyl)diazenyl]-2-methoxy-5-methylphenyl]diazenyl]-3-sulfonaphthalen-1-olate Chemical compound [Na+].COc1cc(N=Nc2ccc(N)cc2)c(C)cc1N=Nc1c(O)c2cc(N)ccc2cc1S([O-])(=O)=O BQHRKYUXVHKLLZ-UHFFFAOYSA-M 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 description 1
- NMOALOSNPWTWRH-UHFFFAOYSA-N tert-butyl 7,7-dimethyloctaneperoxoate Chemical compound CC(C)(C)CCCCCC(=O)OOC(C)(C)C NMOALOSNPWTWRH-UHFFFAOYSA-N 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- VRVDFJOCCWSFLI-UHFFFAOYSA-K trisodium 3-[[4-[(6-anilino-1-hydroxy-3-sulfonatonaphthalen-2-yl)diazenyl]-5-methoxy-2-methylphenyl]diazenyl]naphthalene-1,5-disulfonate Chemical compound [Na+].[Na+].[Na+].COc1cc(N=Nc2cc(c3cccc(c3c2)S([O-])(=O)=O)S([O-])(=O)=O)c(C)cc1N=Nc1c(O)c2ccc(Nc3ccccc3)cc2cc1S([O-])(=O)=O VRVDFJOCCWSFLI-UHFFFAOYSA-K 0.000 description 1
- KOZCZZVUFDCZGG-UHFFFAOYSA-N vinyl benzoate Chemical compound C=COC(=O)C1=CC=CC=C1 KOZCZZVUFDCZGG-UHFFFAOYSA-N 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/08—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of polarising materials
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
Definitions
- the present invention relates to a method for producing a polarizing film using a polyvinyl alcohol resin film and a polyvinyl alcohol resin for a polarizing film. Moreover, this invention relates to the manufacturing method of the polarizing film which can dye
- polarizing films formed using a polyvinyl alcohol (hereinafter sometimes referred to as PVA) resin film are widely used.
- the PVA resin film When manufacturing a polarizing film using the PVA resin film, the PVA resin film is uniaxially stretched and then dyed. Thereafter, fixing treatment is performed using a boronic acid aqueous solution or the like. Alternatively, the PVA-based resin film is dyed and then uniaxially stretched, and then fixed with an aqueous boronic acid solution or the like.
- Patent Document 1 discloses a polarizing film using a PVA-based resin film and a method for manufacturing the polarizing film.
- the film width is 2 m or more
- the retardation difference between two points 1 cm apart in the width direction is 5 nm or less
- the retardation difference between two points 1 m apart in the width direction is 50 nm or less.
- a PVA resin film is disclosed.
- Patent Document 1 describes that this PVA-based resin film has little color unevenness and can be uniformly stretched.
- Patent Document 1 describes that the degree of saponification of PVA is preferably 95 mol% or more, and most preferably 99.5 mol% or more from the viewpoint of polarization performance and durability.
- Patent Document 2 describes a polarizing plate obtained by applying PVA on a support film to form a PVA layer, stretching the PVA layer together with the support film, and dyeing, and a method for producing the polarizing plate.
- Patent Document 2 describes the use of a fully saponified PVA having a saponification degree of 98.0 to 99.9 mol% and a polymerization degree of 1700 to 2600.
- the film is immersed in warm water to swell, and then immersed in an iodine / potassium iodide aqueous solution to adsorb iodine.
- a polarizing film is obtained by dyeing and fixing by performing a drying treatment at 50 ° C. for 5 minutes. Also in this case, there is a problem that a relatively long time is required for the dyeing and fixing treatment, and the productivity of the polarizing film is low.
- the object of the present invention is a method for producing a polarizing film, which can be sufficiently dyed in a short time and can also shorten the time required for the fixing treatment, and thus can greatly increase the productivity of a polarizing film with little dyeing unevenness, And a polyvinyl alcohol resin for a polarizing film capable of enhancing the productivity of a polarizing film with little dyeing unevenness, a polyvinyl alcohol resin solution for a polarizing film, a polarizing film and a polarizing plate using the polyvinyl alcohol resin for a polarizing film. It is.
- polyvinyl formed using a polyvinyl alcohol-based resin having a saponification degree of 94 to 98.5 mol% and a polymerization degree of 2500 to 3000 required in accordance with JIS K 6726.
- a method for producing a polarizing film comprising a step of preparing an alcohol-based resin film and a step of obtaining a polarizing film using the polyvinyl alcohol-based resin film.
- the step of obtaining the polarizing film includes a step of dyeing the polyvinyl alcohol-based resin film, a step of stretching the polyvinyl alcohol-based resin film, and the polyvinyl And immobilizing dyeing of the alcohol-based resin film.
- the step of preparing the polyvinyl alcohol-based resin film includes casting a resin solution containing the polyvinyl alcohol-based resin and a solvent on a support, It is a step of obtaining the polyvinyl alcohol-based resin film by drying.
- the polyvinyl alcohol resin for a polarizing film according to the present invention is a polyvinyl alcohol resin used for obtaining a polarizing film, and has a saponification degree of 94 to 98.5 mol% required in accordance with JIS K 6726. And a polyvinyl alcohol resin having a polymerization degree of 2500 to 3000.
- the polyvinyl alcohol resin solution for a polarizing film according to the present invention is a polyvinyl alcohol resin solution used for obtaining a polarizing film, and includes the above-described polyvinyl alcohol resin for a polarizing film and water.
- the polarizing film according to the present invention is formed using the above-described polyvinyl alcohol resin for polarizing film.
- the polarizing plate according to the present invention is formed using the polarizing film described above.
- a conventional polyvinyl alcohol resin film is used. Compared with the manufacturing method of the polarizing film using this, dyeing time can be shortened significantly. Moreover, the time of the fixing process performed after dyeing can also be shortened significantly. Moreover, the polarization performance does not deteriorate so much. Therefore, it is possible to obtain a polarizing film that uses a polyvinyl alcohol-based resin and has good polarization performance with high productivity.
- the polyvinyl alcohol resin for polarizing film according to the present invention has a saponification degree of 94 to 98.5 mol% and a polymerization degree of 2500 to 3000, so that it has very good dyeability. For this reason, it is possible to significantly increase the productivity of a polarizing film with little dyeing unevenness.
- the polyvinyl alcohol (hereinafter sometimes referred to as PVA) resin used in the method for producing a polarizing film according to the present invention is obtained by polymerizing a vinyl ester to obtain a polymer, and then saponifying the obtained polymer, that is, adding water. It is obtained by decomposing. According to a conventionally known method, a vinyl ester is polymerized to obtain a polymer, and then the obtained polymer is saponified to obtain a PVA resin.
- the saponification degree of the PVA-based resin is a value measured according to JIS K 6726, and needs to be 94 to 98.5 mol%.
- the quarrel is preferably less than 98.5 mol%, more preferably less than 98 mol%.
- the PVA resin may be a resin having a vinyl alcohol unit or a polyvinyl alcohol resin.
- the above saponification degree is a value obtained by measuring in accordance with JIS K 6726.
- the degree of saponification indicates the proportion of units that are actually saponified to vinyl alcohol units among the units converted to vinyl alcohol units by saponification.
- a PVA-type resin film will melt
- the method for adjusting the saponification degree is not particularly limited.
- the saponification degree can be appropriately adjusted according to saponification conditions, that is, hydrolysis conditions.
- vinyl ester vinyl acetate, vinyl formate, vinyl propionate, vinyl butyrate, vinyl pivalate, vinyl versatate, vinyl laurate, vinyl stearate, vinyl benzoate and the like can be used.
- the polymer obtained by polymerizing the vinyl ester may be a copolymer of the vinyl ester and another monomer. That is, the PVA resin may be formed using a copolymer of a vinyl ester and another monomer.
- the other monomer that is, a comonomer to be copolymerized, include olefins such as ethylene, propylene, 1-butene, and isobutene; (meth) acrylic acid and its salt; methyl (meth) acrylate, (meth) acrylic acid (Meth) acrylic acid esters such as ethyl, n-propyl (meth) acrylate, i-propyl (meth) acrylate, n-butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate; acrylamide, n -(Meth) acrylamide derivatives such as methylacrylamide, N-ethylacrylamide, N, N-dimethyl
- the amount of modification is preferably 15 mol% or less, and more preferably 5 mol% or less. That is, in the total 100 mol% of the structural unit derived from the vinyl ester in the modified PVA and the structural unit derived from the other monomer, the structural unit derived from the vinyl ester is preferably 85 mol% or more, more preferably 95 mol%. The structural unit derived from the other monomer is preferably at most 15 mol%, more preferably at most 5 mol%.
- modified polyvinyl alcohol modified PVA is included in polyvinyl alcohol (PVA).
- polymerization catalyst used when polymerizing the vinyl ester examples include 2-ethylhexyl peroxydicarbonate (trade name “Trigonox EHP”, manufactured by Tianjin McEIT), 2,2′-azobisisobutyronitrile (AIBN), t-butylperoxyneodecanoate, bis (4-t-butylcyclohexyl) peroxydicarbonate, di-n-propylperoxydicarbonate, di-n-butylperoxydicarbonate, di-cetylperoxydicarbonate, and di- Examples thereof include s-butyl peroxydicarbonate.
- the said polymerization catalyst only 1 type may be used and 2 or more types may be used together.
- the polymerization degree of the PVA resin is required to be 2500 to 3000.
- the degree of polymerization is within the above range, deformation is unlikely to occur when performing solution treatment such as dyeing, or when the PVA-based resin film is exposed to high temperature and high humidity, etc., or contacted with water. Become. For this reason, while the water resistance of the polarizing film obtained becomes high, the yield in a manufacturing process can be improved and productivity of a polarizing film can be improved.
- the polymerization degree of the PVA resin is preferably more than 2500, more preferably 2550 or more, and further preferably 2600 or more.
- the polymerization degree of the PVA-based resin exceeds the lower limit, or is equal to or higher than the lower limit, the PVA-based resin can be prevented from being dissolved in the solution during solution treatment such as dyeing.
- the degree of polymerization of the PVA-based resin is preferably less than 3000, more preferably 2950 or less, and still more preferably 2900 or less.
- the dyeing time can be shortened, and the productivity of the polarizing film can be further enhanced.
- the degree of polymerization is too low, the solubility in a solvent increases and the strength of the polarizing film decreases. Further, deformation and uneven dyeing occur in the dyeing process. For this reason, when the degree of polymerization is too low, it is extremely difficult to produce a polarizing film with high productivity despite adjusting the degree of saponification from the viewpoint of shortening the dyeing time.
- the degree of polymerization is too high, the solubility of the PVA resin in a solvent becomes low, and film formation by solution casting becomes difficult.
- the degree of polymerization can be measured according to JIS K 6726.
- a method of forming the PVA resin by an appropriate method can be used.
- a method of casting and drying a PVA resin solution containing a PVA resin and a solvent on a support is used.
- the PVA resin solution containing the PVA resin and the solvent is suitably used for obtaining a polarizing film.
- coating the said PVA-type resin solution on a support body, and drying is used suitably.
- the method of coating on the support include various methods such as wire bar coating, reverse coating, gravure coating, die coating, comma coating, lip coating, spin coating, screen coating, fountain coating, dipping and spraying.
- the solvent is not particularly limited, and a solvent capable of dissolving the PVA resin is preferably used.
- the solvent include water and organic solvents.
- As for the said solvent only 1 type may be used and 2 or more types may be used together.
- organic solvent examples include dimethyl sulfoxide, dimethylformamide, dimethylacetamide, N-methylpyrrolidone, ethylene glycol, glycerin, propylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, trimethylolpropane, ethylenediamine, diethylenetriamine, and diglycerin. Can be mentioned.
- the solvent preferably contains water, glycerin or dimethyl sulfoxide because the solubility of the PVA resin is excellent.
- the solvent preferably contains water, preferably contains glycerin, and preferably contains dimethyl sulfoxide. Since the solubility of the PVA resin is excellent, the solvent is preferably water, a mixed solvent of water and glycerin, or dimethyl sulfoxide. It is particularly preferable that the solvent contains water. It is particularly preferable that the PVA resin solution contains water.
- the said PVA-type resin solution may contain the plasticizer as needed, and may contain surfactant.
- the plasticizer is used, the stretchability of the PVA resin film is increased.
- the plasticizer is not particularly limited, but a polyhydric alcohol is preferably used.
- a polyhydric alcohol it is used also as said solvent. That is, the polyhydric alcohol acts as a plasticizer and is further used as a solvent.
- the solvent preferably contains the polyhydric alcohol.
- the polyhydric alcohol include ethylene glycol, glycerin, propylene glycol, diethylene glycol, diglycerin, and triethylene glycol.
- the said polyhydric alcohol only 1 type may be added and 2 or more types may be added. In order to improve the stretchability of the PVA-based resin film, diglycerin, ethylene glycol and glycerin are preferable.
- the content of the polyhydric alcohol in the PVA resin solution is preferably 1 to 25 parts by weight with respect to 100 parts by weight of the PVA resin.
- the content of the polyhydric alcohol is 1 part by weight or more, the dyeability and stretchability can be further enhanced.
- the content of the polyhydric alcohol is 25 parts by weight or less, the handleability of the PVA resin film during dyeing and stretching is improved.
- the surfactant is not particularly limited, and an appropriate anionic or nonionic surfactant can be suitably used.
- the concentration of the PVA resin in the PVA resin solution is not particularly limited, but is preferably 3% by weight or more, more preferably 5% by weight or more, still more preferably 6% by weight or more, and particularly preferably 7% by weight or more. It is preferably 30% by weight or less, more preferably 20% by weight or less, still more preferably 15% by weight or less, and particularly preferably 12% by weight or less.
- concentration of the PVA resin is equal to or higher than the lower limit, a long time is not required for drying, and a PVA resin film with good film quality can be obtained.
- concentration of the PVA-based resin is not more than the above upper limit, solution casting becomes easy.
- the support used at the time of casting the solution maintains the PVA-based resin solution on the surface at the time of casting the solution and can support the PVA-based resin film.
- the support is preferably in the form of a film, and is preferably a support film.
- the material for the support include polyolefin, polyethylene terephthalate, and acrylic resin.
- the polyolefin include ethylene and polypropylene.
- the thickness of the PVA-based resin film formed on the support by the solution casting is preferably 5 to 50 ⁇ m after stretching.
- drying method after casting the solution can be any suitable method and is not particularly limited.
- Examples of the drying method include a method of natural drying and a method of heat drying.
- the method for producing a polarizing film according to the present invention includes a step of preparing a polyvinyl alcohol-based resin film formed using the above-described polyvinyl alcohol-based resin, and a step of obtaining a polarizing film using the polyvinyl alcohol-based resin film. Is provided.
- a method for producing a polarizing film 1) a step of dyeing the PVA resin film, a step of stretching the PVA resin film after dyeing, and a step of fixing the PVA resin film after dyeing and stretching And 2) a step of dyeing the PVA resin film and stretching the PVA resin film, and a step of fixing the PVA resin film after dyeing and stretching.
- the step of obtaining the polarizing film fixes the dyeing step of dyeing the PVA resin film, the stretching step of stretching the PVA resin film, and the dyeing of the PVA resin film. It is preferable to provide a fixing process step. In this case, it may be stretched after dyeing or at the time of dyeing, or may be dyed after stretching.
- the fixing treatment may be performed after dyeing and at the time of stretching, or after dyeing and stretching.
- an appropriate dye When dyeing the PVA resin film, an appropriate dye can be used.
- the dye include iodine-potassium iodide, direct black 17, 19, 154, direct brown 44, 106, 195, 210, 223, direct red 2, 23, 28, 31, 37, 39, 79, 81, 210, 242,247, Direct Blue 1,15,22,78,90,108,151,158,202,236,249,270, Direct Violet 9,12,51,98, Direct Green 1,85, Direct Yellow 8, Dichroic dyes such as 12, 44, 86, 87 and direct orange 26, 39, 106, 107 can be used. Only 1 type may be used for the said dye and it may use 2 or more types together.
- the PVA resin film When dyeing, the PVA resin film may be immersed in a dye solution containing the dye. A dye solution may be applied on the PVA resin film.
- the PVA resin film may be peeled off from the support and dyed. Or you may dye
- dyeing the PVA resin film supported by the support it is preferable to dye after stretching.
- the dyeing can be performed quickly.
- the PVA resin film may be uniaxially stretched or stretched other than uniaxially stretched.
- the PVA resin film is preferably uniaxially stretched.
- the stretching method may be a wet stretching method or a dry heat stretching method. Moreover, you may extend
- the PVA resin film may be stretched in air.
- the stretching temperature is not particularly limited, but is preferably 30 ° C. or higher, more preferably 50 ° C. or higher, preferably 180 ° C. or lower, more preferably 90 ° C. or lower.
- the stretching temperature is preferably 30 to 90 ° C.
- the stretching temperature is preferably 50 to 180 ° C.
- the temperature is equal to or higher than the temperature at which the support is stretched, and the PVA resin film is degraded.
- the stretching temperature may be set appropriately below the temperature at which no decomposition occurs.
- the stretching temperature is preferably 30 to 130 ° C. when the support is polypropylene, for example. In the case of terephthalate, the temperature is preferably 60 to 140 ° C. If the support is applicable to wet stretching, wet stretching may be performed.
- the draw ratio is preferably 4 times or more, more preferably 5 times or more.
- the polarization performance can be enhanced by increasing the draw ratio. If the draw ratio is too high, there is a possibility that it cannot be drawn uniformly. Accordingly, the draw ratio is desirably 8 times or less.
- a fixing treatment for fixing the orientation of the dye is performed after dyeing and stretching, or after dyeing and during stretching.
- This fixing process can be performed according to a known method. That is, the said fixing process can be performed by immersing the said PVA-type resin film in the solution containing a boron atom.
- the solution containing boron atoms contains, for example, boric acid or a boron compound.
- the temperature during the fixing process is not particularly limited, and may be about 30 to 90 ° C.
- the PVA resin film When a PVA resin film is formed on a support as described above, the PVA resin film may be stretched after being peeled from the support, and the PVA resin film is supported (laminated) on the support. In this state, the PVA resin film may be stretched together with the support.
- the polarizing film can be obtained by drying the PVA resin film. This drying may be performed by natural drying. In order to increase the drying rate, it is desirable to heat and dry.
- the heating temperature is preferably 30 ° C. or higher, more preferably 50 ° C. or higher, preferably 150 ° C. or lower, more preferably 100 ° C. or lower.
- the polarizing film obtained as described above comprises the PVA resin having a saponification degree of 94 to 98.5 mol% and a polymerization degree of 2500 to 3000 measured (based on) JIS K 6726.
- the time required for the dyeing process and the fixing process can be greatly shortened.
- the PVA resin film can be sufficiently dyed in a short time, there is little dyeing unevenness of the obtained polarizing film. Accordingly, it is possible to obtain a polarizing film with high productivity and little dyeing unevenness.
- the polarizing film obtained as mentioned above is used for various optical devices and display devices such as a polarizing plate of a liquid crystal display device.
- the polarizing film is preferably used to obtain a polarizing plate by laminating protective films on both sides or one side of the polarizing film.
- a cellulose triacetate (triacetyl cellulose, TAC) film, an acetic acid / cellulose butyrate (CEB) film, an olefin film, an acrylic film, a polyester film, or the like can be used.
- a PVA adhesive, a urethane adhesive, or the like can be used as an adhesive used for bonding when obtaining a polarizing plate.
- the PVA resin used in the following Examples 2 to 10 and Comparative Example 5 is a PVA resin produced by polymerizing vinyl acetate and saponifying by a conventional method.
- the degree of polymerization was controlled by polymerization conditions such as polymerization temperature and pressure.
- the degree of saponification was controlled by the hydrolysis conditions.
- Example 1 PVA resin having a saponification degree of 98.5 mol% (product name: CELVOL C350, manufactured by Seki Swiss Specialty Chemicals Co., Ltd., trade name: water) is added to 100 parts by weight of water, and the concentration of the PVA resin is 10% by weight. An aqueous solution was prepared.
- CELVOL C350 manufactured by Seki Swiss Specialty Chemicals Co., Ltd., trade name: water
- the obtained PVA-based resin aqueous solution was applied on a polypropylene film (thickness 60 ⁇ m) as a support film and dried to obtain a PVA-based resin film.
- the PVA resin film supported by the support film was uniaxially stretched at a free end in a thermostat kept at 110 ° C. to obtain a film stretched 5.5 times.
- the film was immersed in an aqueous solution containing iodine and potassium iodide at a concentration of 0.4 g / L of iodine and 40 g / L of potassium iodide at a temperature of 30 ° C. for 120 seconds and dyed.
- a PVA-based resin film is immersed in an aqueous solution containing boric acid and potassium iodide at a concentration of 60 g / L boric acid and 30 g / L potassium iodide together with a support film at 55 ° C. for 2 minutes to obtain a polarizing film. Obtained.
- the thickness of the obtained polarizing film was 20 ⁇ m.
- a 80 ⁇ m thick triacetylcellulose film was bonded to this polarizing film to obtain a polarizing plate
- Example 2 A polarizing film was produced in the same manner as in Example 1 except that a PVA resin (degree of polymerization 2500) having a saponification degree of 95 mol% was used as the PVA resin, and a polarizing plate was obtained.
- a PVA resin degree of polymerization 2500
- Example 3 A polarizing film was produced in the same manner as in Example 1 except that a PVA resin having a saponification degree of 98 mol% (polymerization degree 2700) was used as the PVA resin, and a polarizing plate was obtained.
- Example 4 A polarizing film was prepared and a polarizing plate was obtained in the same manner as in Example 1 except that a PVA resin having a saponification degree of 97 mol% (polymerization degree 2700) was used as the PVA resin.
- Example 5 A polarizing film was prepared in the same manner as in Example 1 except that a PVA resin having a saponification degree of 96 mol% (polymerization degree 2700) was used as the PVA resin, and a polarizing plate was obtained.
- Example 6 A polarizing film was prepared in the same manner as in Example 1 except that a PVA resin having a saponification degree of 98 mol% (polymerization degree 2800) was used as the PVA resin, and a polarizing plate was obtained.
- Example 7 A polarizing film was prepared and a polarizing plate was obtained in the same manner as in Example 1 except that a PVA resin having a saponification degree of 97 mol% (polymerization degree 2800) was used as the PVA resin.
- Example 8 A polarizing film was produced in the same manner as in Example 1 except that a PVA resin having a saponification degree of 96 mol% (polymerization degree 2800) was used as the PVA resin, and a polarizing plate was obtained.
- Example 9 A polarizing film was prepared in the same manner as in Example 1 except that a PVA resin (degree of polymerization: 2900) having a saponification degree of 95 mol% was used as the PVA resin, and a polarizing plate was obtained.
- a PVA resin degree of polymerization: 2900
- Example 10 A polarizing film was prepared in the same manner as in Example 1 except that a PVA resin having a saponification degree of 96 mol% (polymerization degree 2900) was used as the PVA resin, and a polarizing plate was obtained.
- Example 1 A polarizing film was produced in the same manner as in Example 1 except that a PVA resin having a saponification degree of 99.3 mol% (manufactured by Seki Swiss Specialty Chemicals, trade name: CELVOL C165, polymerization degree 2500) was used as the PVA resin. And the polarizing plate was obtained.
- a PVA resin having a saponification degree of 99.3 mol% manufactured by Seki Swiss Specialty Chemicals, trade name: CELVOL C165, polymerization degree 2500
- Example 2 A polarizing film was prepared in the same manner as in Example 1 except that a PVA resin having a saponification degree of 99.3 mol% (manufactured by Seki Swiss Specialty Chemicals, trade name: CELVOL C125, polymerization degree 1800) was used as the PVA resin. And the polarizing plate was obtained.
- a PVA resin having a saponification degree of 99.3 mol% manufactured by Seki Swiss Specialty Chemicals, trade name: CELVOL C125, polymerization degree 1800
- a PVA resin having a saponification degree of 99.3 mol% (manufactured by Seki Swiss Specialty Chemicals, trade name: CELVOL C165, polymerization degree 2500) was used, and the dyeing time was 240 seconds and the boric acid treatment time was 5 A polarizing film was produced in the same manner as in Example 1 except that the minute was used, and a polarizing plate was obtained.
- Example 4 A polarizing film was prepared in the same manner as in Example 1 except that a PVA resin having a saponification degree of 93 mol% (product name: CELVOL C543, polymerization degree 2450) was used as the PVA resin, and A polarizing plate was obtained.
- a PVA resin having a saponification degree of 93 mol% product name: CELVOL C543, polymerization degree 2450
- Example 5 A polarizing film was produced in the same manner as in Example 1 except that a PVA resin was used as a PVA resin for a PVA resin having a saponification degree of 98 mol% (polymerization degree 2400), and a polarizing plate was obtained.
- Polarization degree P ⁇ (YP ⁇ YC) / (YP + YC) ⁇ 1/2
- Polarization degree is 99 or more.
- ⁇ Polarization degree is 90 or more and less than 99.
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Abstract
Description
本発明に係る偏光フィルムの製造方法で用いられるポリビニルアルコール(以下、PVAと記載することがある)系樹脂は、ビニルエステルを重合してポリマーを得た後、得られたポリマーをけん化、すなわち加水分解することにより得られる。従来周知の方法に従って、ビニルエステルを重合してポリマーを得た後、得られたポリマーをけん化することで、PVA系樹脂を得ることが可能である。本発明では、PVA系樹脂のけん化度は、JIS K 6726に準拠して測定した値であり、94~98.5モル%であることが必要である。上記けんか度は、好ましくは98.5モル%未満、より好ましくは98モル%未満である。なお、PVA系樹脂は、ビニルアルコール単位を有する樹脂であってもよく、ポリビニルアルコール樹脂であってもよい。
本発明に係る偏光フィルムの製造方法は、上述したポリビニルアルコール系樹脂を用いて形成されたポリビニルアルコール系樹脂フィルムを用意する工程と、上記ポリビニルアルコール系樹脂フィルムを用いて、偏光フィルムを得る工程とを備える。
けん化度98.5モル%のPVA系樹脂(セキスイスペシャリティケミカルズ製、商品名:CELVOL C350、重合度2500)100重量部に水を添加し、PVA系樹脂の濃度が10重量%であるPVA系樹脂水溶液を調製した。
PVA系樹脂として、けん化度95モル%のPVA系樹脂(重合度2500)を用いたこと以外は実施例1と同様にして偏光フィルムを作製し、かつ偏光板を得た。
PVA系樹脂として、けん化度98モル%のPVA系樹脂(重合度2700)を用いたこと以外は実施例1と同様にして偏光フィルムを作製し、かつ偏光板を得た。
PVA系樹脂として、けん化度97モル%のPVA系樹脂(重合度2700)を用いたこと以外は実施例1と同様にして偏光フィルムを作製し、かつ偏光板を得た。
PVA系樹脂として、けん化度96モル%のPVA系樹脂(重合度2700)を用いたこと以外は実施例1と同様にして偏光フィルムを作製し、かつ偏光板を得た。
PVA系樹脂として、けん化度98モル%のPVA系樹脂(重合度2800)を用いたこと以外は実施例1と同様にして偏光フィルムを作製し、かつ偏光板を得た。
PVA系樹脂として、けん化度97モル%のPVA系樹脂(重合度2800)を用いたこと以外は実施例1と同様にして偏光フィルムを作製し、かつ偏光板を得た。
PVA系樹脂として、けん化度96モル%のPVA系樹脂(重合度2800)を用いたこと以外は実施例1と同様にして偏光フィルムを作製し、かつ偏光板を得た。
PVA系樹脂として、けん化度95モル%のPVA系樹脂(重合度2900)を用いたこと以外は実施例1と同様にして偏光フィルムを作製し、かつ偏光板を得た。
PVA系樹脂として、けん化度96モル%のPVA系樹脂(重合度2900)を用いたこと以外は実施例1と同様にして偏光フィルムを作製し、かつ偏光板を得た。
PVA系樹脂として、けん化度99.3モル%のPVA系樹脂(セキスイスペシャリティケミカルズ製、商品名:CELVOL C165、重合度2500)を用いたこと以外は実施例1と同様にして偏光フィルムを作製し、かつ偏光板を得た。
PVA系樹脂として、けん化度99.3モル%のPVA系樹脂(セキスイスペシャリティケミカルズ製、商品名:CELVOL C125、重合度1800)を用いたこと以外は実施例1と同様にして偏光フィルムを作製し、かつ偏光板を得た。
PVA系樹脂として、けん化度99.3モル%のPVA系樹脂(セキスイスペシャリティケミカルズ製、商品名:CELVOL C165、重合度2500)を用いたこと、並びに染色時間を240秒及びホウ酸処理時間を5分間としたこと以外は実施例1と同様にして偏光フィルムを作製し、かつ偏光板を得た。
PVA系樹脂として、けん化度93モル%のPVA系樹脂(セキスイスペシャリティケミカルズ製、商品名:CELVOL C543、重合度2450)を用いたこと以外は実施例1と同様にして偏光フィルムを作製し、かつ偏光板を得た。
PVA系樹脂として、けん化度98モル%のPVA系樹脂(重合度2400)にPVA系樹脂を用いたこと以外は実施例1と同様にして偏光フィルムを作製し、かつ偏光板を得た。
(1)偏光度の測定
実施例1~10及び比較例1~5で得られた各偏光板の偏光度Pを、島津製作所製の分光光度計UV-3101PC装置を用いて、クロス透過率及びパラレル透過率を測定して求めた。偏光度を下記の基準で判定した。なお、クロス透過率をYC、パラレル透過率をYPとしたとき、偏光度Pは下記式で表される。
○:偏光度が99以上
△:偏光度が90以上かつ99未満
×:偏光度が90未満
実施例1~10及び比較例1~5で得られた各偏光フィルムを観察し、染色ムラを以下の基準で評価した。
○:全く染色ムラは見られない
△:染色ムラが見られる
×:染色ムラに加えて変形が見られる
Claims (7)
- JIS K 6726に準拠して求められるけん化度が94~98.5モル%でありかつ重合度が2500~3000であるポリビニルアルコール系樹脂を用いて形成されたポリビニルアルコール系樹脂フィルムを用意する工程と、
前記ポリビニルアルコール系樹脂フィルムを用いて、偏光フィルムを得る工程とを備える、偏光フィルムの製造方法。 - 前記偏光フィルムを得る工程が、前記ポリビニルアルコール系樹脂フィルムを染色する工程と、前記ポリビニルアルコール系樹脂フィルムを延伸する工程と、前記ポリビニルアルコール系樹脂フィルムの染色を固定化する工程とを備える、請求項1に記載の偏光フィルムの製造方法。
- 前記ポリビニルアルコール系樹脂フィルムを用意する工程は、支持体上に前記ポリビニルアルコール系樹脂と溶媒とを含む樹脂溶液を流延し、乾燥することにより前記ポリビニルアルコール系樹脂フィルムを得る工程である、請求項1又は2に記載の偏光フィルムの製造方法。
- 偏光フィルムを得るために用いられるポリビニルアルコール系樹脂であって、
JIS K 6726に準拠して求められるけん化度が94~98.5モル%でありかつ重合度が2500~3000であるポリビニルアルコール系樹脂である、偏光フィルム用ポリビニルアルコール系樹脂。 - 偏光フィルムを得るために用いられるポリビニルアルコール系樹脂溶液であって、
請求項4に記載の偏光フィルム用ポリビニルアルコール系樹脂と、水とを含む、偏光フィルム用ポリビニルアルコール系樹脂溶液。 - 請求項4に記載の偏光フィルム用ポリビニルアルコール系樹脂を用いて形成されている偏光フィルム。
- 請求項6に記載の偏光フィルムを用いて形成されている偏光板。
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EP12753034.3A EP2682792B1 (en) | 2011-03-03 | 2012-03-02 | Method for manufacturing polarizing film |
JP2012513389A JP6066727B2 (ja) | 2011-03-03 | 2012-03-02 | 偏光フィルムの製造方法及び偏光板の製造方法 |
US14/002,963 US20140016195A1 (en) | 2011-03-03 | 2012-03-02 | Method for manufacturing polarizing film, poly(vinyl alcohol)-based resin for polarizing film, poly(vinyl alcohol)-based resin solution for polarizing film, polarizing film, and polarizing plate |
CN201280011527.3A CN103403587B (zh) | 2011-03-03 | 2012-03-02 | 偏振膜的制造方法、偏振膜用聚乙烯醇类树脂、偏振膜用聚乙烯醇类树脂溶液、偏振膜及偏振片 |
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JP2014199278A (ja) * | 2013-03-29 | 2014-10-23 | 住友化学株式会社 | 偏光性積層フィルムの製造方法及び偏光板の製造方法 |
JP2015049497A (ja) * | 2013-09-05 | 2015-03-16 | 日東電工株式会社 | 積層フィルムの剥離装置、積層フィルムの剥離方法およびそれを用いた光学フィルム積層体の製造方法。 |
JP2016539389A (ja) * | 2014-09-30 | 2016-12-15 | エルジー・ケム・リミテッド | 薄型偏光子の製造方法、およびこれを用いて製造された薄型偏光子 |
JP2017076116A (ja) * | 2015-10-14 | 2017-04-20 | 日東電工株式会社 | 偏光子およびその製造方法 |
WO2024004974A1 (ja) * | 2022-06-28 | 2024-01-04 | 株式会社クラレ | 偏光板、熱成形体および熱成形体の製造方法 |
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JP6125061B2 (ja) | 2015-02-13 | 2017-05-10 | 日東電工株式会社 | 偏光フィルム、粘着剤層付偏光フィルム並びに画像表示装置およびその連続製造方法 |
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EP2682792A4 (en) | 2014-10-29 |
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CN103403587B (zh) | 2015-11-25 |
TW201237051A (en) | 2012-09-16 |
JP6066727B2 (ja) | 2017-01-25 |
JPWO2012118185A1 (ja) | 2014-07-07 |
KR20140053841A (ko) | 2014-05-08 |
US20140016195A1 (en) | 2014-01-16 |
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