CN111868148A - Biaxially oriented polyester film roll for mold release - Google Patents
Biaxially oriented polyester film roll for mold release Download PDFInfo
- Publication number
- CN111868148A CN111868148A CN201980018027.4A CN201980018027A CN111868148A CN 111868148 A CN111868148 A CN 111868148A CN 201980018027 A CN201980018027 A CN 201980018027A CN 111868148 A CN111868148 A CN 111868148A
- Authority
- CN
- China
- Prior art keywords
- film
- biaxially oriented
- thickness
- polyester film
- stretching
- 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
Links
- 229920006267 polyester film Polymers 0.000 title claims abstract description 50
- 238000000465 moulding Methods 0.000 claims abstract description 13
- 239000003985 ceramic capacitor Substances 0.000 claims description 13
- 239000000155 melt Substances 0.000 claims description 6
- 229920001225 polyester resin Polymers 0.000 claims description 4
- 239000004645 polyester resin Substances 0.000 claims description 4
- 239000010408 film Substances 0.000 abstract description 132
- 239000002002 slurry Substances 0.000 abstract description 35
- 239000000919 ceramic Substances 0.000 abstract description 13
- 239000011248 coating agent Substances 0.000 abstract description 10
- 238000000576 coating method Methods 0.000 abstract description 10
- 239000010409 thin film Substances 0.000 abstract description 3
- 239000002245 particle Substances 0.000 description 61
- 239000010410 layer Substances 0.000 description 59
- 229920000728 polyester Polymers 0.000 description 49
- 238000000034 method Methods 0.000 description 35
- 238000005266 casting Methods 0.000 description 31
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 23
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 17
- 239000002994 raw material Substances 0.000 description 15
- 239000011162 core material Substances 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 11
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 10
- 230000015572 biosynthetic process Effects 0.000 description 10
- 238000004804 winding Methods 0.000 description 10
- 239000013067 intermediate product Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 8
- 238000005259 measurement Methods 0.000 description 8
- 229920000642 polymer Polymers 0.000 description 8
- 239000000377 silicon dioxide Substances 0.000 description 8
- 238000001816 cooling Methods 0.000 description 7
- 238000005520 cutting process Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- MYRTYDVEIRVNKP-UHFFFAOYSA-N 1,2-Divinylbenzene Chemical compound C=CC1=CC=CC=C1C=C MYRTYDVEIRVNKP-UHFFFAOYSA-N 0.000 description 6
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 6
- 239000002253 acid Substances 0.000 description 6
- 239000008188 pellet Substances 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 239000000758 substrate Substances 0.000 description 6
- 229910000019 calcium carbonate Inorganic materials 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 5
- 238000001035 drying Methods 0.000 description 5
- 230000009477 glass transition Effects 0.000 description 5
- 230000003746 surface roughness Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 4
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000009998 heat setting Methods 0.000 description 4
- 239000005001 laminate film Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000011146 organic particle Substances 0.000 description 4
- 238000006068 polycondensation reaction Methods 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920002050 silicone resin Polymers 0.000 description 4
- 239000004925 Acrylic resin Substances 0.000 description 3
- 229920000178 Acrylic resin Polymers 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- -1 aromatic diol Chemical class 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 239000011259 mixed solution Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 229920005990 polystyrene resin Polymers 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 230000037303 wrinkles Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
- 239000004594 Masterbatch (MB) Substances 0.000 description 2
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 2
- 229910002113 barium titanate Inorganic materials 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 2
- WOZVHXUHUFLZGK-UHFFFAOYSA-N dimethyl terephthalate Chemical compound COC(=O)C1=CC=C(C(=O)OC)C=C1 WOZVHXUHUFLZGK-UHFFFAOYSA-N 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005886 esterification reaction Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 239000010954 inorganic particle Substances 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 description 2
- 238000007581 slurry coating method Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 229920005792 styrene-acrylic resin Polymers 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 238000005809 transesterification reaction Methods 0.000 description 2
- WVLBCYQITXONBZ-UHFFFAOYSA-N trimethyl phosphate Chemical compound COP(=O)(OC)OC WVLBCYQITXONBZ-UHFFFAOYSA-N 0.000 description 2
- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 description 1
- UNQWKAVGUZNMJZ-UHFFFAOYSA-N 2,3-dibromoterephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C(Br)=C1Br UNQWKAVGUZNMJZ-UHFFFAOYSA-N 0.000 description 1
- ISPYQTSUDJAMAB-UHFFFAOYSA-N 2-chlorophenol Chemical compound OC1=CC=CC=C1Cl ISPYQTSUDJAMAB-UHFFFAOYSA-N 0.000 description 1
- XFEGRFIENDJTCK-UHFFFAOYSA-N 2-phenyl-2,3-dihydroindene-1,1-dicarboxylic acid Chemical compound C1C2=CC=CC=C2C(C(=O)O)(C(O)=O)C1C1=CC=CC=C1 XFEGRFIENDJTCK-UHFFFAOYSA-N 0.000 description 1
- VPWNQTHUCYMVMZ-UHFFFAOYSA-N 4,4'-sulfonyldiphenol Chemical compound C1=CC(O)=CC=C1S(=O)(=O)C1=CC=C(O)C=C1 VPWNQTHUCYMVMZ-UHFFFAOYSA-N 0.000 description 1
- IEEZXCFWEVKMQT-UHFFFAOYSA-N 4-(1-phenylpropyl)phenol Chemical compound C=1C=C(O)C=CC=1C(CC)C1=CC=CC=C1 IEEZXCFWEVKMQT-UHFFFAOYSA-N 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- UUAGPGQUHZVJBQ-UHFFFAOYSA-N Bisphenol A bis(2-hydroxyethyl)ether Chemical compound C=1C=C(OCCO)C=CC=1C(C)(C)C1=CC=C(OCCO)C=C1 UUAGPGQUHZVJBQ-UHFFFAOYSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 241000037740 Coptis chinensis Species 0.000 description 1
- 239000004640 Melamine resin Substances 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 235000010724 Wisteria floribunda Nutrition 0.000 description 1
- ORLQHILJRHBSAY-UHFFFAOYSA-N [1-(hydroxymethyl)cyclohexyl]methanol Chemical compound OCC1(CO)CCCCC1 ORLQHILJRHBSAY-UHFFFAOYSA-N 0.000 description 1
- 238000007259 addition reaction Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 125000002723 alicyclic group Chemical group 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- VKJLWXGJGDEGSO-UHFFFAOYSA-N barium(2+);oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[O-2].[Ti+4].[Ba+2] VKJLWXGJGDEGSO-UHFFFAOYSA-N 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005250 beta ray Effects 0.000 description 1
- MPMBRWOOISTHJV-UHFFFAOYSA-N but-1-enylbenzene Chemical compound CCC=CC1=CC=CC=C1 MPMBRWOOISTHJV-UHFFFAOYSA-N 0.000 description 1
- KDYFGRWQOYBRFD-NUQCWPJISA-N butanedioic acid Chemical compound O[14C](=O)CC[14C](O)=O KDYFGRWQOYBRFD-NUQCWPJISA-N 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- PDXRQENMIVHKPI-UHFFFAOYSA-N cyclohexane-1,1-diol Chemical compound OC1(O)CCCCC1 PDXRQENMIVHKPI-UHFFFAOYSA-N 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 239000000539 dimer Substances 0.000 description 1
- 150000002009 diols Chemical class 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- VVTXSHLLIKXMPY-UHFFFAOYSA-L disodium;2-sulfobenzene-1,3-dicarboxylate Chemical compound [Na+].[Na+].OS(=O)(=O)C1=C(C([O-])=O)C=CC=C1C([O-])=O VVTXSHLLIKXMPY-UHFFFAOYSA-L 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000007720 emulsion polymerization reaction Methods 0.000 description 1
- 150000002148 esters Chemical group 0.000 description 1
- NJSUFZNXBBXAAC-UHFFFAOYSA-N ethanol;toluene Chemical compound CCO.CC1=CC=CC=C1 NJSUFZNXBBXAAC-UHFFFAOYSA-N 0.000 description 1
- 239000007888 film coating Substances 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003365 glass fiber Substances 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
- 239000012770 industrial material Substances 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- XIXADJRWDQXREU-UHFFFAOYSA-M lithium acetate Chemical compound [Li+].CC([O-])=O XIXADJRWDQXREU-UHFFFAOYSA-M 0.000 description 1
- UEGPKNKPLBYCNK-UHFFFAOYSA-L magnesium acetate Chemical compound [Mg+2].CC([O-])=O.CC([O-])=O UEGPKNKPLBYCNK-UHFFFAOYSA-L 0.000 description 1
- 239000011654 magnesium acetate Substances 0.000 description 1
- 229940069446 magnesium acetate Drugs 0.000 description 1
- 235000011285 magnesium acetate Nutrition 0.000 description 1
- 229940071125 manganese acetate Drugs 0.000 description 1
- UOGMEBQRZBEZQT-UHFFFAOYSA-L manganese(2+);diacetate Chemical compound [Mn+2].CC([O-])=O.CC([O-])=O UOGMEBQRZBEZQT-UHFFFAOYSA-L 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- KYTZHLUVELPASH-UHFFFAOYSA-N naphthalene-1,2-dicarboxylic acid Chemical compound C1=CC=CC2=C(C(O)=O)C(C(=O)O)=CC=C21 KYTZHLUVELPASH-UHFFFAOYSA-N 0.000 description 1
- NXPPAOGUKPJVDI-UHFFFAOYSA-N naphthalene-1,2-diol Chemical compound C1=CC=CC2=C(O)C(O)=CC=C21 NXPPAOGUKPJVDI-UHFFFAOYSA-N 0.000 description 1
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- LCUPNHOUKMJAQN-UHFFFAOYSA-N phenoxycarbonyl phenyl carbonate Chemical compound C=1C=CC=CC=1OC(=O)OC(=O)OC1=CC=CC=C1 LCUPNHOUKMJAQN-UHFFFAOYSA-N 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- 239000011342 resin composition Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000004447 silicone coating Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000004736 wide-angle X-ray diffraction Methods 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
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
-
- 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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
- C08L67/03—Polyesters derived from dicarboxylic acids and dihydroxy compounds the dicarboxylic acids and dihydroxy compounds having the carboxyl- and the hydroxy groups directly linked to aromatic rings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G13/00—Apparatus specially adapted for manufacturing capacitors; Processes specially adapted for manufacturing capacitors not provided for in groups H01G4/00 - H01G11/00
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/30—Stacked capacitors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/514—Oriented
- B32B2307/518—Oriented bi-axially
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Abstract
A polyester film for releasing a mold, characterized in that the film width is 400mm or more, and the deviation sigma value (sigma) of the thickness is a value obtained by continuously measuring 10,000m in the film length directionMD) Is 0.15 μm or less. Provide the possibility ofA biaxially oriented polyester film for releasing mold, which can reduce the rigidity of a support body during green sheet molding and the amount of strain during electrode printing and can optimize the coating property of a ceramic slurry during thin film green sheet molding.
Description
Technical Field
The present invention relates to a biaxially oriented polyester film roll for releasing, which is obtained by winding a biaxially oriented polyester film for releasing, which has excellent uniformity of film thickness when a film slurry is applied.
Background
Biaxially oriented polyester films are used in various applications as industrial materials from the viewpoints of mechanical properties, thermal properties, strength of hardness, and cost. In particular, recently, the resin composition is used as a process paper for electronic components, for example, a release film for green sheets used for forming multilayer ceramic capacitors, a spacer for liquid crystal polarizers, a substrate for dry film resists, and a substrate for releasing interlayer insulating resins.
With the recent advanced functions of smartphones and the popularization of smartwatches and wearable devices, the reduction in size and the increase in capacity of multilayer ceramic capacitors have been further advanced. With respect to a release film used for producing a multilayer ceramic capacitor, there is an increasing demand for a polyester film which has high smoothness as the green sheet is thinned, has no defects on the surface and inside of the film, and has excellent film planarity. On the other hand, the multilayer ceramic capacitor mounted on an automobile is rapidly increasing in demand by the expansion Of the production volume Of electric automobiles, the change Of Internet Of Things (IoT) Of automobiles, and the mounting Of an automatic driving function on an automobile. These multilayer ceramic capacitors for automobiles are required to have higher reliability than conventional ones. In particular, in the molding of a green sheet to be a dielectric member of a multilayer ceramic capacitor, when a film is used as a substrate, the unevenness in the thickness of the paste stacked on top is more strictly controlled due to the unevenness in the thickness of the film and the planar characteristics of the film.
As for the thickness unevenness of the film, a method of measuring 15m in the longitudinal direction and determining it, and a method of measuring 1m length per 5mm and determining it are known as a known method, as shown in patent document 1. As shown in patent document 2, in the cross prism method for inspecting a polarizer, the intensity unevenness of light leaking from the polarizer is increased, which is an obstacle to inspection, and therefore, it is necessary to make the thickness not within a predetermined range. As shown in patent document 3, it is known that simultaneous biaxial stretching is performed to improve the plane orientation.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open No. 2008-246685
Patent document 2: japanese patent laid-open publication No. 2017-007175
Patent document 3: japanese patent laid-open publication No. 2004-291240
Disclosure of Invention
Problems to be solved by the invention
In recent years, there is a demand for capacitors having a high reliability in addition to a reduction in size and an increase in capacitance. Miniaturization is achieved by downsizing the electrodes. The capacity increase, that is, the reduction in film thickness of the green sheet, and the high reliability are achieved by improving the dimensional accuracy in the width, length, and thickness directions when the electrodes and the green sheet are provided. Among them, regarding the uniformity of the coating thickness when the paste is applied, since the area of one electrode becomes fine in the subsequent step of performing electrode printing, the strain and offset of the electrode pattern are minimized as one of the factors that determine the variation in the dielectric constant of the capacitor, that is, the variation in the capacitance of the capacitor. Therefore, the demand for minimization of thickness unevenness of the film is becoming severe. In particular, it has been shown that, in the step of performing film coating of the slurry while constantly monitoring the slurry thickness and correcting the inclination of the die, the thickness unevenness of the base film in the entire length of the roll is likely to act when manufacturing the capacitor. Therefore, in the present invention, it is an object to reduce the variation in film thickness over the entire length of a roll, particularly when used as a support for green sheet molding.
Means for solving the problems
The present inventors have conducted extensive studies in view of the above circumstances, and as a result, have found that by optimizing the film characteristics, the slurry in the longitudinal, width, and thickness directions has excellent dimensional stabilityThe present invention has been completed based on a roll of a biaxially oriented polyester film for mold release obtained by winding a biaxially oriented polyester film for mold. That is, the present invention is characterized in that the film width is 400mm or more, and the variation σ value (σ) of the thickness is a value obtained by continuously measuring 10,000m in the film longitudinal directionMD) A biaxially oriented release polyester film roll having a thickness of 0.15 μm or less.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present invention, it is possible to provide a biaxially oriented polyester film roll for mold release obtained by winding a biaxially oriented polyester film for mold release, which can reduce variations in thickness during green sheet molding and optimize the coatability of a ceramic slurry during ultrathin green sheet molding.
Detailed Description
The present invention will be described in further detail below.
The biaxially oriented polyester film roll for mold release of the present invention is obtained by winding a biaxially oriented polyester film for mold release (hereinafter, may be simply referred to as a biaxially oriented polyester film) around a core material such as a core. Here, the term "biaxially oriented" refers to a state in which an unstretched (unoriented) film is stretched in a two-dimensional direction by a conventional method, and refers to a state in which a pattern of biaxial orientation is displayed by wide-angle X-ray diffraction. As for the stretching, a method selected from the group consisting of sequential biaxial stretching and simultaneous biaxial stretching may be employed. The sequential biaxial stretching may be performed in the steps of stretching in the longitudinal direction (longitudinal direction) and the width direction (transverse direction) 1 time each, or 2 times each, such as longitudinal-transverse-longitudinal-transverse direction.
The polyester in the biaxially oriented polyester film of the present invention is a polyester containing a dibasic acid and a diol as components, and examples of the aromatic dibasic acid include terephthalic acid, isophthalic acid, phthalic acid, naphthalenedicarboxylic acid, diphenylsulfonedicarboxylic acid, diphenyletherdicarboxylic acid, diphenylketodicarboxylic acid, phenylindanedicarboxylic acid, sodium sulfoisophthalate, and dibromoterephthalic acid. As the alicyclic dibasic acid, oxalic acid, succinic acid, adipic acid, azelaic acid, sebacic acid, dimer acid, and the like can be used. Examples of the aliphatic diol include ethylene glycol, propylene glycol, 1, 4-butanediol, 1, 6-hexanediol, neopentyl glycol, and diethylene glycol, examples of the aromatic diol include naphthalenediol, 2 bis (4-hydroxydiphenyl) propane, 2 bis (4-hydroxyethoxyphenyl) propane, bis (4-hydroxyphenyl) sulfone, and hydroquinone, and examples of the alicyclic diol include cyclohexanedimethanol and cyclohexanediol.
The polyester can be produced by a known method and preferably has an intrinsic viscosity of 0.5 at the lower limit and 0.8 at the upper limit. The lower limit is more preferably 0.55 and the upper limit is more preferably 0.70. For the measurement of intrinsic viscosity, a value calculated from the solution viscosity measured at 25 ℃ in o-chlorophenol by the following formula was used.
ηsp/C＝[η]+K[η]2·C
Here,. eta.sp. (solution viscosity/solvent viscosity) — 1, C is the dissolved polymer mass per 100ml of solvent (g/100ml, usually 1.2), and K is the hauses constant (set to 0.343). The solution viscosity and the solvent viscosity were measured using an ostwald viscometer. The unit is represented by [ dl/g ].
The biaxially oriented polyester film of the present invention may be a single layer film or a laminate structure having 2 or more layers. In the case of 2-layer lamination, the laminate film is composed of a polyester a layer and a polyester B layer, and in the case of 3 layers, the laminate film is composed of 3 layers of a polyester a layer, a polyester B layer and a polyester C layer, or 3 layers of a polyester a layer, a polyester B layer and a polyester a layer. In this case, by controlling the amount of particles contained in the layer constituting the surface layer (laminated part), the inner part can be used by mixing the recovered raw material of the edge part generated in the film forming step, the recycled raw material of another film forming step, and the like at appropriate timing within a range not to adversely affect the properties of the film surface, and the consumption of petroleum resources can be reduced and the cost advantage can be obtained, so that a layer structure having 3 or more layers is the most preferable embodiment.
The biaxially oriented polyester film of the present invention preferably contains a recycled raw material and/or a recycled raw material in the C layer. The C layer is therefore preferably the thickest layer of the layer structure. Further, the melt resistivity of the raw material contained in the a layer (smoother layer) is preferably 1.0 × 10 6Omega cm or more and 1.0X 108Omega cm or less, furtherThe step is preferably 5.0X 108Omega cm or less. The raw material having such a melt resistivity value is also preferably a polyester resin. The layer A is preferably a layer constituting the surface of SRa (A) described later, which is 1nm or more and less than 15 nm. It is also preferable to combine the characteristics relating to the composition and thickness of the raw material of the C layer, the characteristics relating to the raw material of the a layer, and the characteristics relating to the surface shape.
The biaxially oriented polyester film of the present invention is preferably formed to have different roughness in order to achieve both smoothness of the surface and workability in transportation, winding, and the like of the surface of the 2 layers constituting the surface layer, i.e., the polyester a layer and the polyester B layer, among the 2 or more layers. That is, the center line roughness sra (a) of the film surface on one side is preferably 1nm or more and less than 15nm, and the center line roughness sra (b) of the film surface on the other side is preferably 20nm or more and 40nm or less. If the SRa (A) is less than 1nm, a release layer may be laminated on the surface, and peeling may be difficult in a peeling step after the ceramic slurry is laminated thereon. Further, if sra (a) is 15nm or more, the surface state of the paste is deteriorated, resulting in uneven thickness, and as a result, the characteristics of the capacitor are likely to be varied. If SRa (B) is less than 20nm, blocking tends to occur during winding after coating the release layer or winding after coating the ceramic slurry, and charging may occur during spinning. Further, the surface of the polyester a layer and the polyester B layer preferably has a center line roughness sra (a) of 2nm or more and less than 12nm on one film surface and a center line roughness sra (B) of 25nm or more and 35nm or less on the other film surface.
The thickness of the biaxially oriented polyester film of the present invention is preferably 12 μm or more, more preferably 20 μm or more, and still more preferably 25 μm or more. Further, it is preferably 188 μm or less, more preferably 50 μm or less, and still more preferably 40 μm or less. If the thickness is less than 12 μm, the hardness for retaining the ceramic slurry may be lost, and the ceramic slurry may not be supported during the application of the ceramic slurry, and uniform drying may not be performed in the subsequent step, and the suppression of thermal wrinkle may be insufficient. If the thickness exceeds 188 μm, the durability against thermal wrinkle is remarkably excellent, but the winding length is reduced, and the unit price per unit area of the substrate forming the ceramic slurry tends to be correspondingly increased, and the temperature rise and stretching in the longitudinal stretching are difficult to be performed, which becomes a factor of deteriorating the thickness unevenness. The thickness is preferably in the range of 12 μm to 188 μm, more preferably 20 μm to 50 μm, and still more preferably 25 μm to 40 μm.
The biaxially oriented polyester film of the present invention may contain particles. The volume average particle diameter of the particles contained in this case is preferably 1.3 μm or less. If the volume average particle diameter of the particles exceeds 1.3 μm, voids, that is, voids are likely to be generated at the interface between the particles and the polymer during stretching, and thus unevenness may be generated in the surface structure and the thickness variation of the slurry may be increased. The term "ultrathin green sheet" as used herein means a sheet having a thickness of less than 1 μm.
The particles used in the present invention may be inorganic particles such as spherical silica, aggregated silica, calcium carbonate, alumina, barium titanate, and titanium oxide, organic particles such as crosslinked polystyrene resin particles, crosslinked silicone resin particles, crosslinked acrylic resin particles, crosslinked styrene-acrylic resin particles, crosslinked polyester particles, polyimide particles, and melamine resin particles. These particles can also serve as a core material for forming pores in addition to the function of forming protrusions on the film surface, and therefore, it is desirable to select the type of particles together with the particle size. Organic particles having high elasticity are preferably used. Among the organic particles, the organic particles are particularly preferably selected from crosslinked polystyrene resin particles, crosslinked silicone resin particles, crosslinked acrylic resin particles, crosslinked styrene-acrylic resin particles, and crosslinked polyester particles. Among the inorganic particles, spherical silica and alumina are particularly preferable.
The shape and particle size distribution of the particles are preferably uniform, and particularly preferably have a particle shape close to a spherical shape. The volume shape factor is preferably 0.3 to pi/6, and more preferably 0.4 to pi/6. The volume shape coefficient f is represented by the following formula.
f＝V/Dm3
Where V is the volume of the particles (. mu.m)3) Dm being particlesMaximum diameter (μm) in the projection plane.
When the particles are spheres, the volume shape coefficient f is the maximum pi/6 (═ 0.52). Further, it is preferable to remove aggregated particles, coarse particles, and the like by performing filtration or the like as necessary. Among them, crosslinked polystyrene resin particles, crosslinked silicone resin particles, and crosslinked acrylic resin particles synthesized by emulsion polymerization or the like can be suitably used, but from the viewpoint of a volume form factor close to a sphere, extremely uniform particle size distribution, and uniform formation of film surface protrusions, crosslinked polystyrene particles and crosslinked silicone are particularly preferable, and spherical silica and the like are further preferable.
The biaxially oriented polyester film of the present invention has a film width of 400mm or more, and a variation σ value (σ value) of the thickness of the film with respect to an average value of thicknesses continuously measured in the film longitudinal direction of 10,000mMD) Is 0.15 μm or less.
The following description will be made in order.
The biaxially oriented polyester film of the present invention has a film width of 400mm or more, and a variation σ value (σ value) of the thickness of the film with respect to an average value of thicknesses continuously measured in the film longitudinal direction of 10,000mMD) Is 0.15 μm or less. The thickness of 10,000m continuously measured in the longitudinal direction of the film is the thickness of the film continuously measured in a non-contact manner. The film width and the length in the longitudinal direction indicate the size of the support body required when the multilayer ceramic capacitor is manufactured in a certain batch. That is, it was found that the formability of the green sheet can be improved by suppressing the variation in thickness within the dimension. In addition, σ may be expressed as follows MDThe value is referred to as film thickness unevenness in the longitudinal direction.
In the conventional biaxially oriented polyester film, the thickness of the film was measured by scanning a non-contact thickness meter in the width direction during film formation, or by measuring a sample of about 20m in the longitudinal direction from a film roll by a contact thickness meter, but in the present invention, continuous measurement was performed at 10,000m in the longitudinal direction as described above, thereby showing uneven thickness behavior that could not be confirmed in the prior art. By acting unevenly with respect to the thickness, the deviation is reduced, therebyThe present invention has an effect of reducing the thickness unevenness of slurry during the application of thin film ceramic slurry, reducing the variation in electrostatic capacity, and suppressing the probability of short circuit. In addition, if σMDWhen the thickness exceeds 0.15. mu.m, the thickness unevenness of the slurry increases during the application of the thin film ceramic slurry, and the above effect is reduced.
The biaxially oriented polyester film of the present invention preferably has a centerline roughness sra (a) of 1nm or more and less than 15nm on one film surface and a centerline roughness sra (b) of 20nm or more and 40nm or less on the other film surface. The biaxially oriented polyester film of the present invention may be subjected to a release treatment on any surface in consideration of the balance between the slurry coating thickness and the handling property, or may be subjected to a flattening treatment before the release treatment, thereby reducing the roughness of the surface of the release layer.
Next, a method for producing the biaxially oriented polyester film of the present invention will be explained, but the present invention is not limited to such an example and will be explained.
As a method for making the polyester contain the inactive particles, for example, the inactive particles are dispersed in a form of slurry in a predetermined ratio in ethylene glycol as a glycol component, and the ethylene glycol slurry is added at an arbitrary stage before the polymerization of the polyester is completed. Here, when the particles are added, for example, if the resulting hydrosol or alcosol is added without being dried once in the synthesis of the particles, the dispersibility of the particles is good and the occurrence of coarse protrusions can be suppressed, which is preferable. In addition, the particle water slurry and predetermined polyester particles directly mixed, supplied to the exhaust system of twin screw mixing extruder and mixed into the polyester method is also effective for the production of the invention.
The master batch containing the particles and the pellets substantially not containing the particles and the like prepared in this way are mixed at a predetermined ratio, dried, and then supplied to a known melt-laminating extruder. The extruder used in the production of the biaxially oriented polyester film of the present invention may be a single-screw or twin-screw extruder. In addition, in order to omit the drying step of the pellets, a vented extruder having a vacuum line in the extruder may be used. In the layer C having the largest extrusion amount, a so-called tandem extruder may be used, in which the function of melting pellets and the function of maintaining the melted pellets at a constant temperature are shared by the extruders. The tandem extruder is preferable as a process for reducing thickness unevenness because the temperature of the polymer at the time of high discharge can be stabilized, and as a result, the viscosity variation of the polymer can be reduced.
The polymer melted by the extruder and extruded was filtered through a filter. Even very small foreign matter once enters the membrane, it becomes a coarse protrusion defect, and therefore, for example, a filter having a high-precision collection efficiency of collecting 95% or more of foreign matter of 3 μm or more is effective. On the other hand, if the collection efficiency of the filter is too high, the degree of pressure rise may become high, and therefore the use of a filter that collects 95% or more of foreign matter smaller than 3 μm with a higher collection efficiency may be an undesirable embodiment in suppressing thickness unevenness. Subsequently, the film was extruded in a sheet form from a slit-shaped slit die, and cooled and solidified on a casting roll to produce an unstretched film. For example, in the case of 3-layer lamination, 3 layers are laminated using 3 extruders, 3-layer flow channels or confluence blocks (for example, confluence blocks having a rectangular confluence section) and the sheets are extruded from a die. The die at this time is expected to automatically adjust the gap of the die by the heater. The sheet extruded from the die was cooled by a casting roll to prepare an unstretched film. In this case, a method of providing a static mixer or a gear pump in the polymer flow path is effective as a means for suppressing the thickness unevenness in the longitudinal direction in the present invention from the viewpoint of stabilizing the back pressure and suppressing the thickness variation. The gear pump has a function of blocking pressure fluctuation in the extrusion process, and therefore, it is necessary to control the thickness in the longitudinal direction uniformly, and by making the rotational speed of the gear incorporated in the gear pump constant, the thickness unevenness in the longitudinal direction can be controlled to be small. In the present invention, it is also effective to control the rotation speed of the gear pump by feeding back the thickness of the rolled intermediate product in terms of weight. This is because the film thickness becomes gradually thinner in the longitudinal direction because the discharge decreases as the filter pressure increases.
Regarding the rotational accuracy of the casting roll, the speed variation of the casting roll surface caused by the eccentricity of the casting roll or the likeThe unevenness of the surface or the movement may affect the thickness unevenness in the longitudinal direction. Conventionally, since the variation in the speed of the surface of the casting roll greatly affects the variation in the thickness in the longitudinal direction, it is a preferable embodiment to attach a balance weight to an arbitrary circumferential position on the end surface of the casting roll in order to reduce the variation in the speed of the surface of the casting roll, thereby suppressing the variation in eccentricity. Further, it is a preferable embodiment that the thickness unevenness in the longitudinal direction is suppressed by dividing the functions of driving and braking, and the like even when 2 motors are used for rotating the casting drum. In the present invention, to control σMDSince the accuracy is required to be further improved, when the rotational accuracy of the casting roll is evaluated, the difference between the maximum value and the minimum value of the uneven state when the distance from the sensor to the casting surface is measured for 1 cycle on the casting circumference, which is measured by the sensor provided on the floor where the casting drum is provided, is set as the vibration. The value is desirably 50 μm or less, and further, the thickness in the longitudinal direction is not uniform (σ) in the present inventionMD) Good results are obtained, and a value of 30 μm or less is a desirable solution. Specifically, the laser displacement meter is installed on the floor surface on which the casting device is installed, and the distance between the casting roll and the measuring portion of the laser displacement meter is measured.
The unstretched film deposited on the casting roll was tightly adhered to the casting (cast) by using an electrostatic force using a pinning (pinning) device. The pinning device applies charges from an electrostatic application line to the casting roll across the entire width of the unstretched film, and causes the film to be in close contact with the casting roll by static electricity applied to the interface between the casting roll and the film. At this time, in order to make the intensity of the electric charge constant in the width direction, it is desirable that the distance from the electrostatic application line to the film be equal throughout the entire width of the unstretched film. Further, in order to maintain the adhesion between the casting roll and the film with an appropriate strength, it is desirable to adjust the strength of the current applied electrostatically.
Further, in order to increase the holding force of the jig at the time of stretching by the transverse stretcher, the thickness of the edge portion of the unstretched film is adjusted to be thicker than the thickness of the center portion, but the adhesiveness of the edge portion is poor, the cooling efficiency of the casting roll is deteriorated, and as a result, crystallization of the edge portion may progress to cause cracking. In addition, when the edge pinning device is applied to the unstretched film, if the edge pinning device is applied to the unstretched film at a position spaced apart from the edge portion by 5mm or more, the unstretched film can be pinned effectively. This is because the leakage current is prevented from abnormally discharging the casting roller at the time of electrostatic application from the edge pinning device. The processing width of the edge pinning is adjusted according to the edge thickness profile of the unstretched film, but the range is set to 20mm or more and less than 100mm, and effective edge portion molding can be performed.
The film cooled by being closely adhered to the casting roll is peeled off from the casting roll by using a draw-off roll, and is led to the next stretching step. In this case, the drawing roller may be driven by water for film cooling.
The stretching method may be simultaneous biaxial stretching or sequential biaxial stretching. In the simultaneous biaxial stretching, when longitudinal and transverse stretching is simultaneously performed, the air flow (accompanying air flow) flowing along the film due to the variation in air velocity affects not only the stretching in the width direction but also the longitudinal direction as external disturbances, and therefore sequential biaxial stretching is preferably applied.
When the polyester film of the present invention is produced by sequential stretching, the initial stretching in the longitudinal direction is important in suppressing the occurrence of scratches and in suppressing the thickness unevenness in the longitudinal direction, and the stretching temperature is 90 ℃ to 130 ℃, preferably 100 ℃ to 120 ℃. If the stretching temperature is lower than 90 ℃, the film is liable to break, and if the stretching temperature is higher than 130 ℃, the film surface is liable to be thermally damaged. From the viewpoint of preventing uneven stretching and scratches, it is preferable that the stretching is performed in 2 or more stages, and the total magnification is 2.8 times or more and 5.0 times or less, preferably 3.3 times or more and 4.0 times or less in the longitudinal direction, and 3.5 times or more and 5 times or less, preferably 4.0 times or more and 4.5 times or less in the width direction. When the longitudinal stretching magnification is set to the above-described value, it is desirable to set a plurality of stretching sections so that the slip between the stretching roller and the film is not likely to occur, because the variation in stretching tension due to the slip can be suppressed. In this case, the stretching ratio of 1 stretching zone is preferably 3.0 times or less because an appropriate stretching tension can be secured. If the temperature and the magnification are exceeded, problems such as uneven stretching and film breakage occur, and it is difficult to obtain a film which is a feature of the present invention.
In the sequential stretching, in the stretching process in the longitudinal direction, the contact between the film and the roller and the difference between the peripheral speed of the roller and the speed of the film tend to cause a scratch when the film slips, and also cause unevenness in the thickness in the longitudinal direction, and therefore, a driving method in which the peripheral speed of the roller can be set independently for each roller is preferable. In the longitudinal stretching process, the material of the conveying roller is selected from the following cases: the unstretched film is heated to a temperature higher than the glass transition temperature before stretching, or is conveyed up to the stretching region while being kept at a temperature lower than the glass transition temperature, and is immediately heated at the time of stretching. When the unstretched film is heated to a temperature not lower than the glass transition temperature before stretching, the non-adhesive silicone roll, ceramic, テフロン (registered trademark) is preferably selected to prevent the stretching unevenness due to adhesion caused by heating. The temperature of the transport roller during the temperature increase is preferably selected by a combination of the material and the transport temperature, and before the unstretched film exceeds the glass transition temperature, the transport roller is preferably a hard chrome-plated metal roller, and the transport temperature is preferably set to less than 80 ℃. In this case, it is preferable to supplement the heat amount by using an infrared heater in the stretching step.
Further, since the stretching roll applies the most load to the film and is a step in which stretching unevenness, which causes thickness unevenness in the longitudinal direction, is likely to occur in this process, the surface roughness Ra of the stretching roll is preferably 0.005 μm or more and 1.0 μm or less, and more preferably 0.1 μm or more and 0.6 μm or less. If Ra is more than 1.0. mu.m, the projections and depressions on the roller surface at the time of stretching are easily transferred to the film surface, and on the other hand, if less than 0.005. mu.m, the roller adheres to the film substrate, and the film is easily thermally damaged. In order to control the surface roughness, it is effective to appropriately adjust the particle size of the polishing agent, the number of polishing operations, and the like.
In the sequential stretching, setting the longitudinal stretching magnification to be lower than the transverse stretching magnification is a preferable stretching condition in terms of reducing thickness unevenness in the longitudinal direction.
Next, when the unstretched film is conveyed to the stretching region while being kept at a temperature lower than the glass transition temperature and immediately heated during stretching, it is preferable that the conveying roller in the preheating region use a metal roller surface-treated with hard chrome or tungsten carbide and having a surface roughness Ra of 0.2 μm or more and 0.6 μm or less in order to suppress thermal wrinkles and adhesion which causes thickness unevenness in the longitudinal direction.
Next, the uniaxially stretched film stretched in the longitudinal direction is heated to 90 ℃ or higher and less than 120 ℃ by a transverse stretcher, and then stretched in the width direction by 3 times or more and less than 6 times to obtain a biaxially stretched (biaxially oriented) film. The transverse stretching machine performs self-circulation in each oven box to spray warm air to the film, thereby heating the film, and performing stretching and heat setting. In this case, in order to prevent the oligomer precipitated from the film heat-treated in the oven from being cooled and adhering to the oven, it is preferable to perform air supply/exhaust in the oven to replace the air. In this case, when the air supplied into the oven is merged with the circulating air, if the temperature of the air is in a state close to that of the outside air, the temperature of the merged air may vary, and the thicknesses in the longitudinal direction and the width direction may vary.
In order to adjust the amount of air supplied/exhausted in the oven, it is preferable that the direction of air flowing up and down the conveyed film be the same direction with respect to the flow direction of the film. In each chamber of the oven, in addition to the self-circulating air, there is a accompanying air flow flowing from the upstream in the same direction as the film transport direction, and the air supply or exhaust is performed outside the oven, so that the flow of air inside the STN varies in a complicated manner. At this time, the flow of air between the chambers, for example, the flow from upstream to downstream to the flow from downstream to upstream may be changed by the pressure difference between the chambers. With regard to the flow of air between the chambers, when the temperature of the air varies between the chambers, the expansion and contraction of the film may be uneven. Therefore, as for the conditions of the intake air amount/the exhaust air amount of the oven, the exhaust air amount is made larger than the feed air amount, so that the air flow in the same direction can be induced.
The biaxially oriented polyester film of the present invention may be further subjected to redrawing 1 or more times in each direction, or may be simultaneously subjected to redrawing by biaxial stretching. As a method for suppressing the thickness unevenness in the longitudinal direction, there is a method of relaxing bowing (bowing) generated in the preceding transverse stretching step in the longitudinal direction redrawing step. In this case, the feed roller before the longitudinal re-stretching in the longitudinal direction may be heated at a temperature of 80 to 100 ℃ or may be fed by using a roller which is not heated. Further, the longitudinal re-stretching step may be performed without applying a stretching magnification. After the further longitudinal stretching, the film is further stretched in the transverse direction, and after the stretching, the film is heat-treated by any conventionally known method and position, such as in an oven or a heated roll. The heat treatment temperature may be generally any temperature of 150 ℃ or more and less than 245 ℃, and the heat treatment time is generally 1 second or more and 60 seconds or less. The heat treatment may be performed while the film is relaxed in its length direction and/or width direction. After the heat treatment, the relaxation is preferably performed by 0% to 10% in the width direction at a temperature lower by 0 ℃ to 150 ℃ than the heat treatment temperature.
The heat-treated film may be provided with an intermediate cooling region and a cooling region, for example, to adjust the dimensional change rate and planarity. Further, in particular, in order to impart specific heat shrinkability, relaxation may be performed in the longitudinal direction and/or the transverse direction in an intermediate cooling region, a cooling region at or after the heat treatment. In this case, it is desirable that the temperature difference in the width direction inside the oven be controlled to 5 ℃.
After the biaxially stretched film is cooled in the conveying step, the edge is cut and wound to obtain an intermediate product. In this conveying step, the film thickness in the width direction is measured, the data is used by feedback, the film thickness is adjusted by adjusting the die thickness or the like, and foreign matter detection can be performed by a defect detector. The thickness can be measured by a β -ray, X-ray, or optical interference method. For the measurement, a method of measuring the thickness of the total width by making 1 measuring device traverse in the width direction, a method of measuring the thickness of the total width by making a plurality of measuring devices traverse in a section divided in the width direction, and when the measurement range is widened, a plurality of measuring devices are fixed in the width direction and the thickness of the total width is measured can be used. The position to be measured may be measured off-line by using the measurement in the above-described conveying step, a biaxially oriented polyester film roll obtained by slitting the intermediate product, or the like.
The intermediate product is cut into an appropriate width and length by a slitting step and wound around a core to obtain a roll of biaxially oriented polyester film. The core is a cylindrical winding core formed of plastic or paper. It is preferable to use a core having less expansion due to temperature and humidity and less deformation due to winding pressure for thickness unevenness, and therefore, a core made of plastic is preferably used. It is further preferable to use a core obtained by reinforcing plastic with glass fiber or carbon fiber. When paper is used as the core, the surface is impregnated with a resin, whereby the strength can be improved. The film cutting step in the slitting step is a step for removing unnecessary portions of the intermediate product to obtain a polyester film roll having a desired product width. In the cutting step, 3 to 10 portions are simultaneously cut in the width direction of the intermediate product. The cutting method may be selected from a method of cutting by shearing with a lower blade and an upper blade, and a method of cutting in the air between rolling lines.
The film width is the width of the film cut in the slitting step, and a polyester film roll having a desired product width can be obtained by adjusting the cutting position in the cutting step in the width direction. In the present invention, the length of the film in the longitudinal direction is measured by a length measuring instrument provided on an arbitrary roller in the slitting step. The intermediate product thus cut in the width direction is wound around the core in an arbitrary length, and is referred to as a polyester film roll in the present invention.
The biaxially oriented polyester film roll for mold release obtained by the above method is wound with a film having little thickness variation in the longitudinal direction, and therefore the film can be used preferably for mold release, particularly for a member for molding a multilayer ceramic capacitor, and further for a member for molding a multilayer ceramic capacitor for an automobile. The term "release application" as used herein means an application in which a film obtained from the biaxially oriented polyester film roll of the present invention is used as a molding member for a substrate, the member is molded, and the molded member is peeled off. Examples of the member include green sheets in a multilayer ceramic capacitor, interlayer insulating resins (electrical insulating resins) in a multilayer circuit board, and polycarbonates (used in solution film formation in this case) in an optical member.
Examples
The present invention will be described in detail in examples below.
The measurement method and evaluation method of the present invention are as follows.
(1) Film thickness unevenness (σ) in the longitudinal directionMD)
The thickness of the product roll in the longitudinal direction was measured at the center in the width direction of the product roll by using SI-T80 (manufactured by キーエンス Co.) provided in an unwinding inspection machine. The unwinding speed was 50m/min, the sampling period was 20msec, and based on the thickness data, the deviation σ from the average value was obtained and was defined as the film thickness unevenness in the longitudinal direction.
(2) Film surface roughness center line roughness (SRa value)
The surface roughness was measured by using a three-dimensional fine surface texture measuring instrument (ET-350K, manufactured by Xiaobanguo corporation), and the arithmetic mean roughness (center line roughness) SRa value was determined from the obtained surface pattern curve in accordance with JIS B0601 (1994). The measurement conditions are as follows.
Length measured in X direction: 0.5mm
X-direction feed speed: 0.1 mm/sec
Y-direction feed pitch: 5 μm
Number of Y-direction lines: 40 root of Chinese goldthread
Stopping: 0.25mm
Stylus pressure: 0.02mN
Height (Z direction) magnification: 5 ten thousand times
The measurement was performed with the X direction being the width direction of the sample and the Y direction being the length direction of the sample.
(3) Melt resistivity of polyester resin
150g of the polyester resin was charged into a 50. phi. test tube subjected to pure water substitution, and dried under reduced pressure at 180 ℃ for 3 hours. Then, the electrode was inserted into the molten polymer by melting at 290 ℃ for 50 minutes under a nitrogen flow. The resistance value was calculated from the amount of current when a voltage of 5,000V was applied between the electrodes, and the melt resistivity was determined. In addition, the electrodes were made of 2 copper plates (22 cm)2) The spacers were manufactured so that the space between the copper plates was 9mm, with テフロン (registered trademark) interposed therebetween.
(example 1)
(1) Production of polyester pellets
(preparation of polyester A)
86.5 parts by mass of terephthalic acid and 37.1 parts by mass of ethylene glycol were subjected to esterification reaction while distilling off water at 255 ℃. After the esterification reaction, 0.02 parts by mass of trimethylphosphoric acid, 0.06 parts by mass of magnesium acetate, 0.01 parts by mass of lithium acetate and 0.0085 parts by mass of antimony trioxide were added, and then the mixture was heated up to 290 ℃ under reduced pressure to carry out polycondensation reaction by raising the temperature, thereby obtaining polyester particles A having an intrinsic viscosity of 0.63 dl/g. The melt resistivity of the chip (chip) was measured and found to be 7.0X 107Ω·cm。
(preparation of polyester B)
In the production of a polyester in the same manner as described above, after the transesterification, spherical silica having a volume average particle diameter of 0.2 μm, a volume shape coefficient f of 0.51 and a mohs hardness of 7 was added to conduct a polycondensation reaction, thereby obtaining a silica-containing mother particle (polyester B) containing 1 mass% of particles based on the polyester.
In addition, the spherical silica used in the polyester B is a monodisperse silica particle obtained as follows: while stirring a mixed solution of ethanol and ethyl silicate, a mixed solution of ethanol, pure water and ammonia water as a basic catalyst is added to the mixed solution, and the obtained reaction solution is stirred to perform hydrolysis of ethyl silicate and polycondensation of the hydrolysis product, and then stirred after the reaction to obtain monodisperse silica particles.
(production of polyester C, D)
An aqueous slurry of divinylbenzene/styrene copolymerized crosslinked particles (degree of crosslinking: 80%) having a volume average particle diameter of 0.3 μm, a volume shape coefficient f of 0.51 and a mohs hardness of 3 was obtained by adsorbing a monomer comprising 80 mass% of divinylbenzene, 15 mass% of ethylvinylbenzene and 5 mass% of styrene obtained by a seed method, and the obtained aqueous slurry was further included in the above homopolyester particles substantially not containing particles by using a separately vented twin-screw kneader, thereby obtaining mother particles (polyester C and polyester D) containing divinylbenzene/styrene copolymerized crosslinked particles having a volume average particle diameter of 0.3 μm and 0.8 μm, respectively, based on 1 mass% of polyester.
(preparation of polyester E)
In the production of polyester A, after the ester exchange, 10 parts by mass of calcium carbonate (volume average particle diameter, Mohs hardness, 3) produced by the carbon dioxide method and 90 parts by mass of ethylene glycol were wet-pulverized to obtain a calcium carbonate/ethylene glycol dispersion slurry. The volume average particle size of the calcium carbonate was 1.1. mu.m. On the other hand, 100 parts by mass of dimethyl terephthalate and 64 parts by mass of ethylene glycol were added with 0.04 part by mass of manganese acetate and 0.03 part by mass of antimony trioxide as catalysts to conduct transesterification, then 0.04 part by mass of trimethyl phosphate as a phosphorus compound was added to the reaction product, and further 1 part by mass of the slurry adjusted in advance was added to conduct polycondensation, thereby obtaining a master batch (polyester E) containing 1% by mass of calcium carbonate with respect to the polyester.
On the other hand, a film obtained after production of a film of the following formulation was recovered, and the granulated substance was used as a recovered raw material a. The ratio described below is represented by a mass ratio (mass%) to the mass of the entire film.
Polyester A93.4
Polyester D: 0.6
Polyester G: 6.0
(2) Blending of polyester particles
The polyester pellets supplied to the extruder for each of the layers A, B and C were blended in the following ratios. The ratio described below is a mass ratio (unit: mass%) of the polyester particles constituting each layer.
Layer A
Polyester A: 87.5
Polyester B: 12.5
Layer B
Polyester A: 60.0
And (3) recovering a raw material A: 40.0
Layer C
Polyester A: 65.0
Polyester C: 30.0
Polyester D: 5.0
(3) Production of biaxially oriented polyester film
After the raw materials blended for each layer described above were stirred in a stirrer, the raw materials for the layers A and C were fed to a twin-screw extruder with a vent for the layers A and C, and the raw material for the layer B was dried under reduced pressure at 160 ℃ for 8 hours and fed to a single-screw extruder for the layer B. The layer B was melt-extruded at 275 ℃ by a tandem extruder, filtered by a high-precision filter which collects 95% or more of foreign matter of 3 μm or more, and then joined and laminated by a joining block using rectangular different kinds of 3 layers to form a 3-layer laminate composed of a layer A, a layer B and a layer C. Then, the cast film was wound around a casting drum having a surface temperature of 25 ℃ and cooled and solidified by an electrostatic application casting method of applying static electricity to the entire width of the unstretched film through a slit die kept at 285 ℃ to obtain an unstretched laminate film. At this time, the casting was performed with an alignment adjustment and a vibration of 25 μm.
The unstretched laminate film was subjected to sequential stretching (in the longitudinal direction and the width direction). First, a film was stretched in the longitudinal direction, conveyed at 105 ℃, and then stretched 3.8 times in the longitudinal direction at 120 ℃ to prepare a uniaxially stretched film.
This uniaxially stretched film was stretched 4.0 times at 115 ℃ in the transverse direction in a tenter, followed by heat setting at 230 ℃, followed by 5% relaxation in the width direction, cooling in the transfer step, and then the edge was cut and wound to obtain an intermediate product of a biaxially stretched film having a thickness of 31 μm. The oven of the tenter adjusts air supply/exhaust from the outside of the oven, and makes the air flow in a certain direction. The intermediate product was slit by a cutter to obtain a roll of a biaxially stretched film having a thickness of 31 μm. The thickness of the biaxially stretched film was measured, and as a result, layer a: 6.5 μm, layer B: 23.5 μm, layer C: 1.0 μm. Data were collected from the obtained product, and the results of characteristic evaluation are shown in table 1.
(4) Application of a Release layer
Then, this biaxially stretched film roll was coated/dried with a coating solution in which a crosslinking primer layer (BY 24-846, manufactured BY imperial レ, ダウコーニング, シリコーン, ltd.) was adjusted to have a solid content of 1 mass%, coated with a gravure coater so that the coating thickness after drying became 0.1 μm, and dried and cured at 100 ℃ for 20 seconds. Then, 100 parts by mass of an addition reaction type silicone resin (trade name LTC750A manufactured by imperial レ, ダウコーニング, シリコーン, Inc.) and 2 parts by mass of a platinum catalyst (trade name SRX212 manufactured by imperial レ, ダウコーニング, シリコーン, Inc.) were applied to a coating liquid adjusted to a solid content of 5% by mass within 1 hour by a gravure coater so that the coating thickness after drying became 0.1 μm, and the coating liquid was dried and cured at 120 ℃ for 30 seconds and wound up to obtain a release film.
(5) Molding coating of green sheet
Glass beads having a number average particle diameter of 2mm were added to 100 parts by mass of barium titanate (trade name HPBT-1, manufactured by Fuji チタン, ), 10 parts by mass of polyvinyl butyral (trade name BL-1, manufactured by hydrochemical, Inc.), 5 parts by mass of dibutyl phthalate, and 60 parts by mass of toluene-ethanol (mass ratio 30: 30), and the mixture was mixed/dispersed for 20 hours by a jet mill, followed by filtration to prepare a paste-like ceramic slurry. The obtained ceramic slurry was applied to a release film by a die coater so that the thickness after drying became 0.5 μm, and the thickness of the dried slurry was continuously measured in a non-contact manner at the center of the application. Then, the sheet was wound to obtain a green sheet. In this case, the slurry thickness unevenness σ value was evaluated, and it was considered good that the slurry thickness unevenness σ value was less than 0.13, acceptable that the slurry thickness unevenness σ value was 0.13 or more and less than 0.15, and defective that the slurry thickness unevenness σ value was more than 0.15. The slurry thickness in the embodiment of example 1 was varied, and the formability of the green sheet was good. In this case, the good level is a level that causes no problem in practical use.
(examples 2 to 4)
The same procedure as in example 1 was repeated except that the conditions for film formation were changed in terms of the stretch ratio and the thickness, and the results are shown in table 1.
(example 5)
The rotation speed of the gear pump was controlled to be lowered in accordance with the increase in the pressure of the polymer filter, and the center value of the thickness was corrected. The same procedure as in example 1 was repeated except that the conditions for film formation were changed in terms of the stretch ratio and the thickness, and the results are shown in table 1.
(example 6)
An edge pinning device is applied to the cast sheet. Pinning was performed in the range of 5mm inside to 50mm inside of the unstretched sheet. Film formation was performed under the same film formation conditions as in example 1. The results are shown in the table.
Comparative examples 1 and 2
The same procedure as in example 1 was repeated except that the conditions for film formation were changed in terms of the stretch ratio and the thickness, and the results are shown in table 2. The thickness unevenness of the slurry was worse than in examples 1 to 4, and the evaluation was passed.
Comparative example 3
The same procedure as in example 1 was repeated except that the longitudinal stretching magnification and the transverse stretching magnification were changed to 4.5 times and 4.5 times, respectively. The purpose of flattening unevenness generated before the process is to set the magnification to be high, but σ is the resultMDIt is worsened. About sigmaMDThe frequency analysis of the thickness unevenness was performed, and as a result, it was confirmed that the unevenness was derived from Uneven stretching cycle of longitudinal stretching.
Comparative example 4
With respect to the vibration of casting, the flow path of the cooling water was deteriorated, and as a result, it became 50 μm. The casting was carried out in the same manner as in example 1 except that the conditions for film formation were changed in terms of the draw ratio and the thickness, and the obtained results are shown in table 2. The uneven thickness of the slurry was evaluated as poor.
Comparative example 5
The raw material contained in the layer A has a melt resistivity of 5.0X 108The raw materials of (1). The cast sheet was observed by reflected light, and as a result, the sheet had uneven stretching in a horizontal section. Film thickness unevenness σ in the measurement longitudinal directionMDIn the case of the data, the waveform of the original data was observed to have periodic thickness unevenness. Since the thickness unevenness was remarkable, silicone coating and slurry coating were not performed.
Comparative example 6
In the embodiment of comparative example 5, the edge pinning device was applied, but the effect of improving the poor casting as observed in comparative example 5 was not obtained.
Comparative example 7
In order to increase the number of times of ventilation of air in the heat-setting zone, oligomer in the oven was removed, and air suction and exhaust were performed in each chamber of the heat-setting zone, and other film forming conditions were the same as in example 1. As a result, the cycle was not fixed, but a state in which film thickness unevenness was deteriorated was observed. The thickness unevenness of the slurry is qualified.
[ Table 1]
[ Table 2]
Industrial applicability
The biaxially oriented polyester film of the present invention is excellent in the planar characteristics in the longitudinal direction, and therefore can be suitably used for mold release applications. In particular, the film is suitable for use in releasing a green sheet as a member in a multilayer ceramic capacitor because the in-plane stretching behavior is made uniform against the tension at the time of processing.
Claims (6)
1. A biaxially oriented polyester film roll for mold release, characterized in that the film width is 400mm or more, and the variation σ value σ of the thickness is σ value, which is the value of σ, from the average value of the thicknesses continuously measured at 10,000m in the film longitudinal directionMDIs 0.15 μm or less.
2. The biaxially oriented release polyester film roll according to claim 1, wherein the center line roughness sra (a) of one film surface of the biaxially oriented release polyester film is 1nm or more and less than 15nm, and the center line roughness sra (b) of the other film surface is 20nm or more and 40nm or less.
3. The roll of biaxially oriented release polyester film according to claim 1 or 2, wherein the biaxially oriented release polyester film has a layer structure of 3 or more layers.
4. The biaxially oriented release polyester film roll according to claim 2 or 3, wherein the layer A constituting the film surface having an SRa (A) value of 1nm or more and less than 15nm contains a layer having a melt resistivity of 1.0X 10 6Omega cm or more and 1.0X 108A polyester resin having an omega cm or less.
5. The roll of biaxially oriented release polyester film according to any one of claims 1 to 4, wherein the biaxially oriented release polyester film is used as a member for molding a multilayer ceramic capacitor.
6. The roll of biaxially oriented release polyester film according to claim 5, wherein the biaxially oriented release polyester film is used as a member for molding a multilayer ceramic capacitor for an automobile.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018-043913 | 2018-03-12 | ||
| JP2018043913 | 2018-03-12 | ||
| PCT/JP2019/008899 WO2019176692A1 (en) | 2018-03-12 | 2019-03-06 | Roll of biaxially oriented release polyester film |
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| Publication Number | Publication Date |
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| CN111868148A true CN111868148A (en) | 2020-10-30 |
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| CN201980018027.4A Pending CN111868148A (en) | 2018-03-12 | 2019-03-06 | Biaxially oriented polyester film roll for mold release |
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| JP (1) | JP7169551B2 (en) |
| KR (1) | KR20200131262A (en) |
| CN (1) | CN111868148A (en) |
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| CN114683646A (en) * | 2020-12-31 | 2022-07-01 | 可隆工业株式会社 | Polyester release film |
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| JP7388091B2 (en) * | 2019-09-26 | 2023-11-29 | 東レ株式会社 | polyester film roll |
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| JP2004148537A (en) * | 2002-10-28 | 2004-05-27 | Toyobo Co Ltd | Mold release film for manufacturing ceramic sheet |
| CN1537046A (en) * | 2001-08-01 | 2004-10-13 | �����֯��ʽ���� | Heat shrinking polyester film roll |
| JP2010167771A (en) * | 2008-12-22 | 2010-08-05 | Toyobo Co Ltd | Biaxially stretched polyethylene terephthalate-based resin film and method of manufacturing the same |
| JP2014133373A (en) * | 2013-01-11 | 2014-07-24 | Toray Ind Inc | Biaxially orientated polyester film for mold release and method of producing the same |
| CN105324245A (en) * | 2013-06-18 | 2016-02-10 | 东丽株式会社 | Biaxially-oriented laminated polyester film for mold release applications |
| JP2017217901A (en) * | 2016-06-02 | 2017-12-14 | 東レ株式会社 | Biaxially oriented polyester film for mold release and manufacturing method therefor |
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| JP2004291240A (en) | 2003-03-25 | 2004-10-21 | Mitsubishi Polyester Film Copp | Release film |
| JP2007287215A (en) | 2006-04-14 | 2007-11-01 | Toray Ind Inc | Support for magnetic recording medium and magnetic recording medium |
| JP5125176B2 (en) | 2007-03-29 | 2013-01-23 | 東レ株式会社 | Biaxially oriented polyester film for polarizing plate release film and method for producing the same |
| JP6500629B2 (en) | 2015-06-19 | 2019-04-17 | 東洋紡株式会社 | Laminated film |
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2019
- 2019-03-06 JP JP2019540108A patent/JP7169551B2/en active Active
- 2019-03-06 KR KR1020207027933A patent/KR20200131262A/en not_active Application Discontinuation
- 2019-03-06 WO PCT/JP2019/008899 patent/WO2019176692A1/en active Application Filing
- 2019-03-06 CN CN201980018027.4A patent/CN111868148A/en active Pending
- 2019-03-11 TW TW108107976A patent/TWI823907B/en active
Patent Citations (6)
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|---|---|---|---|---|
| CN1537046A (en) * | 2001-08-01 | 2004-10-13 | �����֯��ʽ���� | Heat shrinking polyester film roll |
| JP2004148537A (en) * | 2002-10-28 | 2004-05-27 | Toyobo Co Ltd | Mold release film for manufacturing ceramic sheet |
| JP2010167771A (en) * | 2008-12-22 | 2010-08-05 | Toyobo Co Ltd | Biaxially stretched polyethylene terephthalate-based resin film and method of manufacturing the same |
| JP2014133373A (en) * | 2013-01-11 | 2014-07-24 | Toray Ind Inc | Biaxially orientated polyester film for mold release and method of producing the same |
| CN105324245A (en) * | 2013-06-18 | 2016-02-10 | 东丽株式会社 | Biaxially-oriented laminated polyester film for mold release applications |
| JP2017217901A (en) * | 2016-06-02 | 2017-12-14 | 東レ株式会社 | Biaxially oriented polyester film for mold release and manufacturing method therefor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114683646A (en) * | 2020-12-31 | 2022-07-01 | 可隆工业株式会社 | Polyester release film |
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| WO2019176692A1 (en) | 2019-09-19 |
| KR20200131262A (en) | 2020-11-23 |
| TWI823907B (en) | 2023-12-01 |
| TW201945446A (en) | 2019-12-01 |
| JP7169551B2 (en) | 2022-11-11 |
| JPWO2019176692A1 (en) | 2021-01-14 |
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