JP6717657B2 - 生分解性フィルム - Google Patents
生分解性フィルム Download PDFInfo
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- JP6717657B2 JP6717657B2 JP2016096610A JP2016096610A JP6717657B2 JP 6717657 B2 JP6717657 B2 JP 6717657B2 JP 2016096610 A JP2016096610 A JP 2016096610A JP 2016096610 A JP2016096610 A JP 2016096610A JP 6717657 B2 JP6717657 B2 JP 6717657B2
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- Prior art keywords
- film
- aliphatic
- acid
- polyester copolymer
- polylactic acid
- Prior art date
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- 229920000747 poly(lactic acid) Polymers 0.000 claims description 37
- 239000004626 polylactic acid Substances 0.000 claims description 37
- 229920000728 polyester Polymers 0.000 claims description 32
- 229920000642 polymer Polymers 0.000 claims description 26
- 229920003232 aliphatic polyester Polymers 0.000 claims description 21
- KDYFGRWQOYBRFD-UHFFFAOYSA-N succinic acid Chemical compound OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 claims description 12
- 239000002253 acid Substances 0.000 claims description 11
- -1 carbodiimide compound Chemical class 0.000 claims description 11
- 239000000523 sample Substances 0.000 claims description 11
- 125000001931 aliphatic group Chemical group 0.000 claims description 9
- 239000000314 lubricant Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 9
- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 claims description 8
- 239000011347 resin Substances 0.000 claims description 7
- 229920005989 resin Polymers 0.000 claims description 7
- 239000001384 succinic acid Substances 0.000 claims description 6
- 238000001473 dynamic force microscopy Methods 0.000 claims description 5
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 claims description 4
- CDQSJQSWAWPGKG-UHFFFAOYSA-N butane-1,1-diol Chemical compound CCCC(O)O CDQSJQSWAWPGKG-UHFFFAOYSA-N 0.000 claims description 4
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 claims description 4
- 125000003118 aryl group Chemical group 0.000 claims description 3
- 239000001361 adipic acid Substances 0.000 claims description 2
- 235000011037 adipic acid Nutrition 0.000 claims description 2
- JVTAAEKCZFNVCJ-REOHCLBHSA-N L-lactic acid Chemical group C[C@H](O)C(O)=O JVTAAEKCZFNVCJ-REOHCLBHSA-N 0.000 description 12
- 238000000465 moulding Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 11
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 8
- 229930182843 D-Lactic acid Natural products 0.000 description 7
- JVTAAEKCZFNVCJ-UWTATZPHSA-N D-lactic acid Chemical compound C[C@@H](O)C(O)=O JVTAAEKCZFNVCJ-UWTATZPHSA-N 0.000 description 7
- 229940022769 d- lactic acid Drugs 0.000 description 7
- 235000014113 dietary fatty acids Nutrition 0.000 description 6
- 229930195729 fatty acid Natural products 0.000 description 6
- 239000000194 fatty acid Substances 0.000 description 6
- 150000004665 fatty acids Chemical class 0.000 description 6
- 230000000704 physical effect Effects 0.000 description 5
- 229960000448 lactic acid Drugs 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical group OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- UAUDZVJPLUQNMU-KTKRTIGZSA-N erucamide Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-KTKRTIGZSA-N 0.000 description 3
- 239000004310 lactic acid Substances 0.000 description 3
- 235000014655 lactic acid Nutrition 0.000 description 3
- 239000005022 packaging material Substances 0.000 description 3
- 239000008188 pellet Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- BDNKZNFMNDZQMI-UHFFFAOYSA-N 1,3-diisopropylcarbodiimide Chemical compound CC(C)N=C=NC(C)C BDNKZNFMNDZQMI-UHFFFAOYSA-N 0.000 description 2
- FYGFTTWEWBXNMP-UHFFFAOYSA-N 10-amino-10-oxodecanoic acid Chemical compound NC(=O)CCCCCCCCC(O)=O FYGFTTWEWBXNMP-UHFFFAOYSA-N 0.000 description 2
- NGEWQZIDQIYUNV-UHFFFAOYSA-N 2-hydroxy-3-methylbutyric acid Chemical compound CC(C)C(O)C(O)=O NGEWQZIDQIYUNV-UHFFFAOYSA-N 0.000 description 2
- BWLBGMIXKSTLSX-UHFFFAOYSA-N 2-hydroxyisobutyric acid Chemical compound CC(C)(O)C(O)=O BWLBGMIXKSTLSX-UHFFFAOYSA-N 0.000 description 2
- WHBMMWSBFZVSSR-UHFFFAOYSA-N 3-hydroxybutyric acid Chemical class CC(O)CC(O)=O WHBMMWSBFZVSSR-UHFFFAOYSA-N 0.000 description 2
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 description 2
- OZJPLYNZGCXSJM-UHFFFAOYSA-N 5-valerolactone Chemical compound O=C1CCCCO1 OZJPLYNZGCXSJM-UHFFFAOYSA-N 0.000 description 2
- QOSSAOTZNIDXMA-UHFFFAOYSA-N Dicylcohexylcarbodiimide Chemical compound C1CCCCC1N=C=NC1CCCCC1 QOSSAOTZNIDXMA-UHFFFAOYSA-N 0.000 description 2
- AEMRFAOFKBGASW-UHFFFAOYSA-N Glycolic acid Chemical class OCC(O)=O AEMRFAOFKBGASW-UHFFFAOYSA-N 0.000 description 2
- 150000001408 amides Chemical class 0.000 description 2
- 239000002361 compost Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- BGRWYRAHAFMIBJ-UHFFFAOYSA-N diisopropylcarbodiimide Natural products CC(C)NC(=O)NC(C)C BGRWYRAHAFMIBJ-UHFFFAOYSA-N 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- FTQWRYSLUYAIRQ-UHFFFAOYSA-N n-[(octadecanoylamino)methyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCNC(=O)CCCCCCCCCCCCCCCCC FTQWRYSLUYAIRQ-UHFFFAOYSA-N 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000011342 resin composition Substances 0.000 description 2
- BITHHVVYSMSWAG-KTKRTIGZSA-N (11Z)-icos-11-enoic acid Chemical compound CCCCCCCC\C=C/CCCCCCCCCC(O)=O BITHHVVYSMSWAG-KTKRTIGZSA-N 0.000 description 1
- OYUBNQOGHWGLJB-WRBBJXAJSA-N (13z,33z)-hexatetraconta-13,33-dienediamide Chemical compound NC(=O)CCCCCCCCCCC\C=C/CCCCCCCCCCCCCCCCCC\C=C/CCCCCCCCCCCC(N)=O OYUBNQOGHWGLJB-WRBBJXAJSA-N 0.000 description 1
- MXJJJAKXVVAHKI-WRBBJXAJSA-N (9z,29z)-octatriaconta-9,29-dienediamide Chemical compound NC(=O)CCCCCCC\C=C/CCCCCCCCCCCCCCCCCC\C=C/CCCCCCCC(N)=O MXJJJAKXVVAHKI-WRBBJXAJSA-N 0.000 description 1
- CPUBMKFFRRFXIP-YPAXQUSRSA-N (9z,33z)-dotetraconta-9,33-dienediamide Chemical compound NC(=O)CCCCCCC\C=C/CCCCCCCCCCCCCCCCCCCCCC\C=C/CCCCCCCC(N)=O CPUBMKFFRRFXIP-YPAXQUSRSA-N 0.000 description 1
- AFENDNXGAFYKQO-VKHMYHEASA-N (S)-2-hydroxybutyric acid Chemical compound CC[C@H](O)C(O)=O AFENDNXGAFYKQO-VKHMYHEASA-N 0.000 description 1
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- FWVNWTNCNWRCOU-UHFFFAOYSA-N 2-hydroxy-3,3-dimethylbutanoic acid Chemical compound CC(C)(C)C(O)C(O)=O FWVNWTNCNWRCOU-UHFFFAOYSA-N 0.000 description 1
- NYHNVHGFPZAZGA-UHFFFAOYSA-N 2-hydroxyhexanoic acid Chemical compound CCCCC(O)C(O)=O NYHNVHGFPZAZGA-UHFFFAOYSA-N 0.000 description 1
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 1
- SJZRECIVHVDYJC-UHFFFAOYSA-N 4-hydroxybutyric acid Chemical class OCCCC(O)=O SJZRECIVHVDYJC-UHFFFAOYSA-N 0.000 description 1
- 229940006015 4-hydroxybutyric acid Drugs 0.000 description 1
- 239000004970 Chain extender Substances 0.000 description 1
- ORAWFNKFUWGRJG-UHFFFAOYSA-N Docosanamide Chemical compound CCCCCCCCCCCCCCCCCCCCCC(N)=O ORAWFNKFUWGRJG-UHFFFAOYSA-N 0.000 description 1
- FATBGEAMYMYZAF-MDZDMXLPSA-N Elaidamide Chemical compound CCCCCCCC\C=C\CCCCCCCC(N)=O FATBGEAMYMYZAF-MDZDMXLPSA-N 0.000 description 1
- 239000004594 Masterbatch (MB) Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000012773 agricultural material Substances 0.000 description 1
- DTOSIQBPPRVQHS-PDBXOOCHSA-N alpha-linolenic acid Chemical compound CC\C=C/C\C=C/C\C=C/CCCCCCCC(O)=O DTOSIQBPPRVQHS-PDBXOOCHSA-N 0.000 description 1
- 235000020661 alpha-linolenic acid Nutrition 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 230000001588 bifunctional effect Effects 0.000 description 1
- 229920006167 biodegradable resin Polymers 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229930188620 butyrolactone Natural products 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000006482 condensation reaction Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- TUTWLYPCGCUWQI-UHFFFAOYSA-N decanamide Chemical compound CCCCCCCCCC(N)=O TUTWLYPCGCUWQI-UHFFFAOYSA-N 0.000 description 1
- 238000006114 decarboxylation reaction Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- ILRSCQWREDREME-UHFFFAOYSA-N dodecanamide Chemical compound CCCCCCCCCCCC(N)=O ILRSCQWREDREME-UHFFFAOYSA-N 0.000 description 1
- LJZKUDYOSCNJPU-UHFFFAOYSA-N dotetracontanediamide Chemical compound NC(=O)CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC(N)=O LJZKUDYOSCNJPU-UHFFFAOYSA-N 0.000 description 1
- 229920005839 ecoflex® Polymers 0.000 description 1
- BITHHVVYSMSWAG-UHFFFAOYSA-N eicosenoic acid Natural products CCCCCCCCC=CCCCCCCCCCC(O)=O BITHHVVYSMSWAG-UHFFFAOYSA-N 0.000 description 1
- 229940108623 eicosenoic acid Drugs 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000003205 fragrance Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000012760 heat stabilizer Substances 0.000 description 1
- FEEPBTVZSYQUDP-UHFFFAOYSA-N heptatriacontanediamide Chemical compound NC(=O)CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC(N)=O FEEPBTVZSYQUDP-UHFFFAOYSA-N 0.000 description 1
- RKVQXYMNVZNJHZ-UHFFFAOYSA-N hexacosanediamide Chemical compound NC(=O)CCCCCCCCCCCCCCCCCCCCCCCCC(N)=O RKVQXYMNVZNJHZ-UHFFFAOYSA-N 0.000 description 1
- HSEMFIZWXHQJAE-UHFFFAOYSA-N hexadecanamide Chemical compound CCCCCCCCCCCCCCCC(N)=O HSEMFIZWXHQJAE-UHFFFAOYSA-N 0.000 description 1
- BHIXMQGGBKDGTH-UHFFFAOYSA-N hexatetracontanediamide Chemical compound NC(=O)CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC(N)=O BHIXMQGGBKDGTH-UHFFFAOYSA-N 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- OOCSVLHOTKHEFZ-UHFFFAOYSA-N icosanamide Chemical compound CCCCCCCCCCCCCCCCCCCC(N)=O OOCSVLHOTKHEFZ-UHFFFAOYSA-N 0.000 description 1
- 239000012442 inert solvent Substances 0.000 description 1
- 238000010884 ion-beam technique Methods 0.000 description 1
- 125000001261 isocyanato group Chemical group *N=C=O 0.000 description 1
- 150000002596 lactones Chemical class 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- SFIHQZFZMWZOJV-HZJYTTRNSA-N linoleamide Chemical compound CCCCC\C=C/C\C=C/CCCCCCCC(N)=O SFIHQZFZMWZOJV-HZJYTTRNSA-N 0.000 description 1
- 229960004488 linolenic acid Drugs 0.000 description 1
- KQQKGWQCNNTQJW-UHFFFAOYSA-N linolenic acid Natural products CC=CCCC=CCC=CCCCCCCCC(O)=O KQQKGWQCNNTQJW-UHFFFAOYSA-N 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- QEALYLRSRQDCRA-UHFFFAOYSA-N myristamide Chemical compound CCCCCCCCCCCCCC(N)=O QEALYLRSRQDCRA-UHFFFAOYSA-N 0.000 description 1
- OIQFOVMTLWDQIZ-UHFFFAOYSA-N n'-naphthalen-1-ylmethanediimine Chemical compound C1=CC=C2C(N=C=N)=CC=CC2=C1 OIQFOVMTLWDQIZ-UHFFFAOYSA-N 0.000 description 1
- SQEHYBILZVXINP-UHFFFAOYSA-N n'-tert-butyl-n-propan-2-ylmethanediimine Chemical compound CC(C)N=C=NC(C)(C)C SQEHYBILZVXINP-UHFFFAOYSA-N 0.000 description 1
- JEQPWXGHMRFTRF-UHFFFAOYSA-N n,n'-bis(2-methylpropyl)methanediimine Chemical compound CC(C)CN=C=NCC(C)C JEQPWXGHMRFTRF-UHFFFAOYSA-N 0.000 description 1
- NASVTBDJHWPMOO-UHFFFAOYSA-N n,n'-dimethylmethanediimine Chemical compound CN=C=NC NASVTBDJHWPMOO-UHFFFAOYSA-N 0.000 description 1
- NWBVGPKHJHHPTA-UHFFFAOYSA-N n,n'-dioctylmethanediimine Chemical compound CCCCCCCCN=C=NCCCCCCCC NWBVGPKHJHHPTA-UHFFFAOYSA-N 0.000 description 1
- CMESPBFFDMPSIY-UHFFFAOYSA-N n,n'-diphenylmethanediimine Chemical compound C1=CC=CC=C1N=C=NC1=CC=CC=C1 CMESPBFFDMPSIY-UHFFFAOYSA-N 0.000 description 1
- IDVWLLCLTVBSCS-UHFFFAOYSA-N n,n'-ditert-butylmethanediimine Chemical compound CC(C)(C)N=C=NC(C)(C)C IDVWLLCLTVBSCS-UHFFFAOYSA-N 0.000 description 1
- KYMPOPAPQCIHEG-UHFFFAOYSA-N n-[2-(decanoylamino)ethyl]decanamide Chemical compound CCCCCCCCCC(=O)NCCNC(=O)CCCCCCCCC KYMPOPAPQCIHEG-UHFFFAOYSA-N 0.000 description 1
- LYRFLYHAGKPMFH-UHFFFAOYSA-N octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(N)=O LYRFLYHAGKPMFH-UHFFFAOYSA-N 0.000 description 1
- LTHCSWBWNVGEFE-UHFFFAOYSA-N octanamide Chemical compound CCCCCCCC(N)=O LTHCSWBWNVGEFE-UHFFFAOYSA-N 0.000 description 1
- WGOROJDSDNILMB-UHFFFAOYSA-N octatriacontanediamide Chemical compound NC(=O)CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC(N)=O WGOROJDSDNILMB-UHFFFAOYSA-N 0.000 description 1
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 150000002902 organometallic compounds Chemical class 0.000 description 1
- 150000002903 organophosphorus compounds Chemical class 0.000 description 1
- YRPQTVNCCVPGFA-FPLPWBNLSA-N palmitoleamide Chemical compound CCCCCC\C=C/CCCCCCCC(N)=O YRPQTVNCCVPGFA-FPLPWBNLSA-N 0.000 description 1
- WOQDVIVTFCTQCE-UHFFFAOYSA-N pentacontanediamide Chemical compound NC(=O)CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC(N)=O WOQDVIVTFCTQCE-UHFFFAOYSA-N 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920001432 poly(L-lactide) Polymers 0.000 description 1
- 229920001228 polyisocyanate Polymers 0.000 description 1
- 239000005056 polyisocyanate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- WBHHMMIMDMUBKC-XLNAKTSKSA-N ricinelaidic acid Chemical compound CCCCCC[C@@H](O)C\C=C\CCCCCCCC(O)=O WBHHMMIMDMUBKC-XLNAKTSKSA-N 0.000 description 1
- 229960003656 ricinoleic acid Drugs 0.000 description 1
- FEUQNCSVHBHROZ-UHFFFAOYSA-N ricinoleic acid Natural products CCCCCCC(O[Si](C)(C)C)CC=CCCCCCCCC(=O)OC FEUQNCSVHBHROZ-UHFFFAOYSA-N 0.000 description 1
- 239000012748 slip agent Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- UAUDZVJPLUQNMU-MDZDMXLPSA-N trans-13-docosenamide Chemical compound CCCCCCCC\C=C\CCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-MDZDMXLPSA-N 0.000 description 1
- BITHHVVYSMSWAG-MDZDMXLPSA-N trans-gondoic acid Chemical compound CCCCCCCC\C=C\CCCCCCCCCC(O)=O BITHHVVYSMSWAG-MDZDMXLPSA-N 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- PAPBSGBWRJIAAV-UHFFFAOYSA-N ε-Caprolactone Chemical compound O=C1CCCCCO1 PAPBSGBWRJIAAV-UHFFFAOYSA-N 0.000 description 1
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- Manufacture Of Macromolecular Shaped Articles (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
フィルムの延伸方向(MD)と厚さ方向の断面の走査型プローブ顕微鏡のタッピングモードAFMによる位相像の観察において、
前記画像は、ポリ乳酸(A)の不連続相と脂肪族ポリエステル共重合体(B−a)及び脂肪族芳香族ポリエステル共重合体(B−b)のいずれかの不連続相とからなり、
前記各不連続相は層状に分散した構造を有し、
前記ポリ乳酸(A)の不連続相の層の厚さ方向の幅が平均50nm以下である
ことを特徴とするフィルム。
[2] 前記脂肪族ポリエステル共重合体(B−a)が、脂肪族ジオールと脂肪族二塩基酸との重合体である前項[1]に記載のフィルム。
[3] 前記脂肪族芳香族ポリエステル共重合体(B−b)が、脂肪族ジオールと芳香族二塩基酸と脂肪族二塩基酸との重合体である前項[1]または[2]に記載のフィルム。
[4] 前記脂肪族ジオールが1,4−ブタンジオールである前項[2]または[3]に記載のフィルム。
[5] 前記脂肪族二塩基酸が、コハク酸またはアジピン酸である前項[2]〜[4]のいずれかに記載のフィルム。
[6] さらに、前記脂肪族ポリエステル共重合体(B−a)は、ブタンジオールとコハク酸との重合体を含む前項[2]〜[5]のいずれかに記載のフィルム。
[7] 前記ポリ乳酸(A)は、前記フィルム中に31〜50質量%以下含まれる前項[1]〜[6]のいずれかに記載のフィルム。
[8] さらに、前記フィルムは、カルボジイミド化合物(C)を含む前項[1]〜[7]のいずれかに記載のフィルム。
[9] さらに、前記フィルムは、滑剤(D)を含む前項[1]〜[9]のいずれかに記載のフィルム。
本発明のフィルムはカルボジイミド化合物(C)を含むことが好ましい。カルボジイミド化合物(C)は、両末端にイソシアナト基を有しているものが好ましい。これらは公知の方法、例えば、有機リン系化合物または有機金属化合物を触媒として用い、各種ポリイソシアネート化合物を不活性溶媒存在下または不存在下、70℃程度、またはそれ以上の温度で脱炭酸縮合反応させることより合成することができる。
本発明のフィルムは、フィルム同士のブロッキングを防止し製造後の開口性を保つため滑材(D)(「スリップ剤」ともいう。)を含むことが好ましい。滑剤(D)としては、所望により当該技術分野において通常用いられている滑剤が挙げられ、これらを、本発明の特性を損なわない範囲で添加することができる。
具体例としては、例えば、「アルフロー」(日本油脂)、「ダイヤミッド」(日本化成)、「脂肪酸アマイド」(花王)などが挙げられる。
本発明の生分解性フィルムは、フィルムインパクト強度が強く、コンポストバッグ、農業用フィルムおよび包装材料などとして好適に使用される。
Claims (7)
- ポリ乳酸(A)と、少なくとも脂肪族ポリエステル共重合体(B−a)及び脂肪族芳香族ポリエステル共重合体(B−b)を含むポリエステル重合体(B)とのブレンド樹脂のフィルムであって、
前記フィルムは、カルボジイミド化合物(C)をさらに含み、
前記ポリ乳酸(A)は、前記フィルム中に31〜50質量%含まれ、
フィルムの延伸方向(MD)と厚さ方向の断面の走査型プローブ顕微鏡のタッピングモードAFMによる位相像の観察において、
前記画像は、ポリ乳酸(A)の不連続相と脂肪族ポリエステル共重合体(B−a)及び脂肪族芳香族ポリエステル共重合体(B−b)のいずれかの不連続相とからなり、
前記各不連続相は層状に分散した構造を有し、
前記ポリ乳酸(A)の不連続相の層の厚さ方向の幅が平均50nm以下であることを特徴とするフィルム。 - 前記脂肪族ポリエステル共重合体(B−a)が、脂肪族ジオールと脂肪族二塩基酸との重合体である請求項1に記載のフィルム。
- 前記脂肪族芳香族ポリエステル共重合体(B−b)が、脂肪族ジオールと芳香族二塩基酸と脂肪族二塩基酸との重合体である請求項1または2に記載のフィルム。
- 前記脂肪族ジオールが1,4−ブタンジオールである請求項2または3に記載のフィルム。
- 前記脂肪族二塩基酸が、コハク酸またはアジピン酸である請求項2〜4のいずれかに記載のフィルム。
- さらに、前記脂肪族ポリエステル共重合体(B−a)は、ブタンジオールとコハク酸との重合体を含む請求項2〜5のいずれかに記載のフィルム。
- さらに、前記フィルムは、滑剤(D)を含む請求項1〜7のいずれかに記載のフィルム。
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