JPS6328793B2 - - Google Patents
Info
- Publication number
- JPS6328793B2 JPS6328793B2 JP16513778A JP16513778A JPS6328793B2 JP S6328793 B2 JPS6328793 B2 JP S6328793B2 JP 16513778 A JP16513778 A JP 16513778A JP 16513778 A JP16513778 A JP 16513778A JP S6328793 B2 JPS6328793 B2 JP S6328793B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- film
- ethylene
- heat
- sealing
- 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.)
- Expired
Links
- 238000007789 sealing Methods 0.000 claims description 53
- 239000010410 layer Substances 0.000 claims description 46
- -1 polypropylene Polymers 0.000 claims description 39
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 claims description 33
- 229920001577 copolymer Polymers 0.000 claims description 31
- 239000002344 surface layer Substances 0.000 claims description 31
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 29
- 239000005977 Ethylene Substances 0.000 claims description 29
- 229920000642 polymer Polymers 0.000 claims description 28
- 239000004743 Polypropylene Substances 0.000 claims description 27
- 229920001155 polypropylene Polymers 0.000 claims description 27
- 229920002545 silicone oil Polymers 0.000 claims description 16
- IAQRGUVFOMOMEM-UHFFFAOYSA-N butene Natural products CC=CC IAQRGUVFOMOMEM-UHFFFAOYSA-N 0.000 claims description 11
- 229920001038 ethylene copolymer Polymers 0.000 claims description 8
- 229920005992 thermoplastic resin Polymers 0.000 claims description 7
- 229920002959 polymer blend Polymers 0.000 claims description 5
- 238000004806 packaging method and process Methods 0.000 description 52
- 229920005989 resin Polymers 0.000 description 30
- 239000011347 resin Substances 0.000 description 30
- 230000000052 comparative effect Effects 0.000 description 28
- 239000005022 packaging material Substances 0.000 description 27
- 230000037303 wrinkles Effects 0.000 description 21
- 238000002844 melting Methods 0.000 description 15
- 239000000203 mixture Substances 0.000 description 15
- 230000008018 melting Effects 0.000 description 12
- 238000000034 method Methods 0.000 description 12
- 229920001296 polysiloxane Polymers 0.000 description 11
- 230000007547 defect Effects 0.000 description 10
- 239000000047 product Substances 0.000 description 10
- 239000003208 petroleum Substances 0.000 description 9
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 8
- ZSWFCLXCOIISFI-UHFFFAOYSA-N cyclopentadiene Chemical compound C1C=CC=C1 ZSWFCLXCOIISFI-UHFFFAOYSA-N 0.000 description 8
- 238000002156 mixing Methods 0.000 description 8
- 239000001993 wax Substances 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 7
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 7
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 239000002131 composite material Substances 0.000 description 6
- 150000003505 terpenes Chemical class 0.000 description 6
- 235000007586 terpenes Nutrition 0.000 description 6
- CXWXQJXEFPUFDZ-UHFFFAOYSA-N tetralin Chemical compound C1=CC=C2CCCCC2=C1 CXWXQJXEFPUFDZ-UHFFFAOYSA-N 0.000 description 6
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 5
- 239000013032 Hydrocarbon resin Substances 0.000 description 5
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 238000003851 corona treatment Methods 0.000 description 5
- 230000002950 deficient Effects 0.000 description 5
- 238000009998 heat setting Methods 0.000 description 5
- 229920006270 hydrocarbon resin Polymers 0.000 description 5
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 5
- 241001474374 Blennius Species 0.000 description 4
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 4
- VBICKXHEKHSIBG-UHFFFAOYSA-N beta-monoglyceryl stearate Natural products CCCCCCCCCCCCCCCCCC(=O)OCC(O)CO VBICKXHEKHSIBG-UHFFFAOYSA-N 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical class C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 150000001299 aldehydes Chemical class 0.000 description 3
- 239000002216 antistatic agent Substances 0.000 description 3
- 125000004432 carbon atom Chemical group C* 0.000 description 3
- 239000011280 coal tar Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 235000014113 dietary fatty acids Nutrition 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 229930195729 fatty acid Natural products 0.000 description 3
- 239000000194 fatty acid Substances 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 229920001223 polyethylene glycol Polymers 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- GRWFGVWFFZKLTI-IUCAKERBSA-N (-)-α-pinene Chemical compound CC1=CC[C@@H]2C(C)(C)[C@H]1C2 GRWFGVWFFZKLTI-IUCAKERBSA-N 0.000 description 2
- YBYIRNPNPLQARY-UHFFFAOYSA-N 1H-indene Chemical compound C1=CC=C2CC=CC2=C1 YBYIRNPNPLQARY-UHFFFAOYSA-N 0.000 description 2
- VYWRBUBXZALATG-UHFFFAOYSA-N 2-hydroxyoctadecanamide Chemical compound CCCCCCCCCCCCCCCCC(O)C(N)=O VYWRBUBXZALATG-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 2
- 241000238631 Hexapoda Species 0.000 description 2
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 2
- 239000002202 Polyethylene glycol Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 description 2
- 150000001336 alkenes Chemical class 0.000 description 2
- UAHWPYUMFXYFJY-UHFFFAOYSA-N beta-myrcene Chemical compound CC(C)=CCCC(=C)C=C UAHWPYUMFXYFJY-UHFFFAOYSA-N 0.000 description 2
- 239000004359 castor oil Substances 0.000 description 2
- 235000019438 castor oil Nutrition 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 description 2
- 229920001519 homopolymer Polymers 0.000 description 2
- 239000005001 laminate film Substances 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- XMGQYMWWDOXHJM-UHFFFAOYSA-N limonene Chemical compound CC(=C)C1CCC(C)=CC1 XMGQYMWWDOXHJM-UHFFFAOYSA-N 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 2
- 239000008601 oleoresin Substances 0.000 description 2
- 239000005011 phenolic resin Substances 0.000 description 2
- 229920001083 polybutene Polymers 0.000 description 2
- 229920001748 polybutylene Polymers 0.000 description 2
- 229920005547 polycyclic aromatic hydrocarbon Polymers 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- HJWLCRVIBGQPNF-UHFFFAOYSA-N prop-2-enylbenzene Chemical compound C=CCC1=CC=CC=C1 HJWLCRVIBGQPNF-UHFFFAOYSA-N 0.000 description 2
- 239000013557 residual solvent Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- WTARULDDTDQWMU-RKDXNWHRSA-N (+)-β-pinene Chemical compound C1[C@H]2C(C)(C)[C@@H]1CCC2=C WTARULDDTDQWMU-RKDXNWHRSA-N 0.000 description 1
- WTARULDDTDQWMU-IUCAKERBSA-N (-)-Nopinene Natural products C1[C@@H]2C(C)(C)[C@H]1CCC2=C WTARULDDTDQWMU-IUCAKERBSA-N 0.000 description 1
- PMJHHCWVYXUKFD-SNAWJCMRSA-N (E)-1,3-pentadiene Chemical group C\C=C\C=C PMJHHCWVYXUKFD-SNAWJCMRSA-N 0.000 description 1
- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 description 1
- YJTKZCDBKVTVBY-UHFFFAOYSA-N 1,3-Diphenylbenzene Chemical group C1=CC=CC=C1C1=CC=CC(C=2C=CC=CC=2)=C1 YJTKZCDBKVTVBY-UHFFFAOYSA-N 0.000 description 1
- LRTOHSLOFCWHRF-UHFFFAOYSA-N 1-methyl-1h-indene Chemical compound C1=CC=C2C(C)C=CC2=C1 LRTOHSLOFCWHRF-UHFFFAOYSA-N 0.000 description 1
- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-UHFFFAOYSA-N 0.000 description 1
- RFVNOJDQRGSOEL-UHFFFAOYSA-N 2-hydroxyethyl octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCCO RFVNOJDQRGSOEL-UHFFFAOYSA-N 0.000 description 1
- QTWJRLJHJPIABL-UHFFFAOYSA-N 2-methylphenol;3-methylphenol;4-methylphenol Chemical compound CC1=CC=C(O)C=C1.CC1=CC=CC(O)=C1.CC1=CC=CC=C1O QTWJRLJHJPIABL-UHFFFAOYSA-N 0.000 description 1
- KUKRLSJNTMLPPK-UHFFFAOYSA-N 4,7,7-trimethylbicyclo[2.2.1]hept-2-ene Chemical group C1CC2(C)C=CC1C2(C)C KUKRLSJNTMLPPK-UHFFFAOYSA-N 0.000 description 1
- JLBJTVDPSNHSKJ-UHFFFAOYSA-N 4-Methylstyrene Chemical compound CC1=CC=C(C=C)C=C1 JLBJTVDPSNHSKJ-UHFFFAOYSA-N 0.000 description 1
- QHPQWRBYOIRBIT-UHFFFAOYSA-N 4-tert-butylphenol Chemical compound CC(C)(C)C1=CC=C(O)C=C1 QHPQWRBYOIRBIT-UHFFFAOYSA-N 0.000 description 1
- 240000000972 Agathis dammara Species 0.000 description 1
- GLVKGYRREXOCIB-UHFFFAOYSA-N Bornylene Natural products CC1CCC(C(C)(C)C)C=C1 GLVKGYRREXOCIB-UHFFFAOYSA-N 0.000 description 1
- 229920002871 Dammar gum Polymers 0.000 description 1
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerol Natural products OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 1
- 241000233855 Orchidaceae Species 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- WTARULDDTDQWMU-UHFFFAOYSA-N Pseudopinene Natural products C1C2C(C)(C)C1CCC2=C WTARULDDTDQWMU-UHFFFAOYSA-N 0.000 description 1
- 241000779819 Syncarpia glomulifera Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- IKHGUXGNUITLKF-XPULMUKRSA-N acetaldehyde Chemical compound [14CH]([14CH3])=O IKHGUXGNUITLKF-XPULMUKRSA-N 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- XCPQUQHBVVXMRQ-UHFFFAOYSA-N alpha-Fenchene Natural products C1CC2C(=C)CC1C2(C)C XCPQUQHBVVXMRQ-UHFFFAOYSA-N 0.000 description 1
- XYLMUPLGERFSHI-UHFFFAOYSA-N alpha-Methylstyrene Chemical compound CC(=C)C1=CC=CC=C1 XYLMUPLGERFSHI-UHFFFAOYSA-N 0.000 description 1
- VYBREYKSZAROCT-UHFFFAOYSA-N alpha-myrcene Natural products CC(=C)CCCC(=C)C=C VYBREYKSZAROCT-UHFFFAOYSA-N 0.000 description 1
- MVNCAPSFBDBCGF-UHFFFAOYSA-N alpha-pinene Natural products CC1=CCC23C1CC2C3(C)C MVNCAPSFBDBCGF-UHFFFAOYSA-N 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 229930006722 beta-pinene Natural products 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- YXVFYQXJAXKLAK-UHFFFAOYSA-N biphenyl-4-ol Chemical compound C1=CC(O)=CC=C1C1=CC=CC=C1 YXVFYQXJAXKLAK-UHFFFAOYSA-N 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000008280 chlorinated hydrocarbons Chemical class 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 229930003836 cresol Natural products 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 239000000539 dimer Substances 0.000 description 1
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical group C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- UAUDZVJPLUQNMU-KTKRTIGZSA-N erucamide Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-KTKRTIGZSA-N 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 230000035553 feeding performance Effects 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- HYBBIBNJHNGZAN-UHFFFAOYSA-N furfural Chemical compound O=CC1=CC=CO1 HYBBIBNJHNGZAN-UHFFFAOYSA-N 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- LCWMKIHBLJLORW-UHFFFAOYSA-N gamma-carene Natural products C1CC(=C)CC2C(C)(C)C21 LCWMKIHBLJLORW-UHFFFAOYSA-N 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 239000002648 laminated material Substances 0.000 description 1
- 235000001510 limonene Nutrition 0.000 description 1
- 229940087305 limonene Drugs 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- CKQVRZJOMJRTOY-UHFFFAOYSA-N octadecanoic acid;propane-1,2,3-triol Chemical compound OCC(O)CO.CCCCCCCCCCCCCCCCCC(O)=O CKQVRZJOMJRTOY-UHFFFAOYSA-N 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 239000001739 pinus spp. Substances 0.000 description 1
- PMJHHCWVYXUKFD-UHFFFAOYSA-N piperylene Natural products CC=CC=C PMJHHCWVYXUKFD-UHFFFAOYSA-N 0.000 description 1
- 229920001921 poly-methyl-phenyl-siloxane Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- GRWFGVWFFZKLTI-UHFFFAOYSA-N rac-alpha-Pinene Natural products CC1=CCC2C(C)(C)C1C2 GRWFGVWFFZKLTI-UHFFFAOYSA-N 0.000 description 1
- 229920005604 random copolymer Polymers 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000012261 resinous substance Substances 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000013638 trimer Substances 0.000 description 1
- 229940036248 turpentine Drugs 0.000 description 1
- 239000000341 volatile oil Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 125000002256 xylenyl group Chemical class C1(C(C=CC=C1)C)(C)* 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
Description
本発明はラミネート素材、あるいは物品の包装
体、特に密封性の良好な袋あるいは一度箱体等に
収容した形で包装された物品の単体又は集合体を
再度密封包装した包装体を提供することにある。
さらに本発明においては自動包装機による物品の
包装に際し要求される低温溶融接着性、摺動滑
性、熱板離脱性、静電防止性等の特性に優れてい
る包装材料により包装した透明性、光沢の優れた
密封包装体を提供することにある。
近年食品、タバコ、工業用品、日用雑貨品等の
外装に対し高度な要求が高まつている。例えば食
品包装では防湿性、保香性、防虫性、酸素遮断性
等外装材の特性もさることながら、包装時の熱接
着部の密封不足、接着強度不足、包装材の皺によ
る折重なり部からの気密不良による問題等が重視
されてきている。又、包装材の臭気も衛生上の問
題から残留溶剤の減少に必死の努力を業界で実施
している。又一方、自動包装機は益々高速化高能
率になつてきたため自動包装機で使用するために
は次のような特性が優れていることが要求されて
いる。包装材料と自動包装機の金属案内部との滑
り性、包装材料と熱板との離脱性、包装材料と自
動包装機との摺動による傷の防止性、包装材料の
自動包装機への自動供給性。
ヒートシール性を有する包装材料としては、低
融点物質を有機溶剤で溶解し、基体フイルム上に
コーテイングする方法で製造したコーチングフイ
ルム、ポリプロピレン等に低融点重合体を混合し
て得た単体フイルム、低融点重合体を基体フイル
ム上に積層しヒートシール面に該低融点重合体積
層面がくるようにした積層フイルム、或いはポリ
プロピレン等に低分子量熱可塑性樹脂等を混合し
た単体フイルム等が提案されている。しかるにコ
ーテイング法で得られたフイルムは熱時のシール
強度が弱く、本発明の如き密封包装体に適さない
こと、又その上、コーチング面上の残留溶剤を皆
無にすることが困難なことが欠点としてあげられ
る。ポリプロピレン等に低融点重合体を混合して
得たフイルムは低温シール性が悪く、透明性が悪
化することがある。また、フイルムが柔軟なため
にフイルムの腰、剛性が低く、自動包装機により
連続的に包装することが困難である。また、低分
子量熱可塑性樹脂を混合したフイルムはシール強
度は出るものの加熱してゆくと強度が低下する欠
点を有しており、密封度の優れた包装体を得る事
が困難である。低融点重合体を基体フイルム上に
積層する方法も試みられてきているが、低融点重
合体を混合する場合と同じく、逐次２軸延伸を行
なう場合、加熱ロールによる延伸中にロールに融
着する。このため実際上冷延伸をせざるを得ず、
かかる条件下では透明なフイルムは得られない。
例えば、特公昭41−4338号公報にみる如く、真珠
様光沢を有したフイルムとなつてしまう。このた
め、基体となるフイルムを加熱ロールにより縦延
伸後この片面又は両面に該低融点重合体を積層
し、この融着しやすい表面に何ら接触しないよう
に巾出機（テンター）で延伸するという方法がと
られてきている。しかし低融点重合体は熱的にも
機械的にも損傷を受けやすく、透明性を疎外する
ことが多い。
逐次２軸延伸法で得たフイルムからなる包装材
料は、厚み精度、高能率生産性の由に最も経済的
に材料を供給出来る方法である。そして、ヒート
シール強度を過度に要求することは、一方では透
明性を疎外することが多い。本発明はこれらの包
装材としての基本特性を保持しつつ高度の透明性
と光沢を有する包装材料を使用した包装体を提供
しようとするものである。
これ等の要求を背景にして市場に密封包装体を
提供すべく、鋭意研究の結果本発明に到達した。
即ち、本発明はポリプロピレン系重合体により
形成された基層(A)の少なくとも片面の表面がエチ
レン−プロピレン共重合体（エチレン含有量0.5
〜10重量％）86〜95（重量）％とブテン−エチレ
ン共重合体（ブテン含有量70〜99重量％）14〜５
（重量）％とを有する重合体混合物により形成さ
れた表面層(B)であり、かつ該表面層の合計厚みが
全体の0.2〜50％であつて個々の表面層の厚みが
0.2〜10μである少なくとも２層の積層フイルムを
熱接着することにより物品を包装したものである
ことを特徴とする密封性の良好な包装体である。
基体フイルム層(A)を形成するポリプロピレン系
重合体は融点が140℃以上、好ましくは融点150℃
以上のプロピレンを主体とした重合体であつて例
えばアイソタクテイツク指数85（重量）％以上の
アイソタクテイツクポリプロピレン、エチレン含
有量が７（重量）％以下のエチレン／プロピレン
共重合体、プロピレンが90（重量）％以上のプロ
ピレンと炭素数が４〜６のα−オレフインとの共
重合体を主成分とし、或いはこれ等の重合体混合
物等である。該ポリプロピレン系重合体は固有粘
度（135℃テトラリン溶液）が1.6〜3.0dl／ｇで
あるのが好ましい。特に1.8〜2.5dl／ｇであるの
が好ましい。固有粘度が1.6dl／ｇ未満では透明
な包装材料を得られず、又、3.0dl／ｇを越える
と、押出性が低下し、特に本発明として好適な複
合体包装体のための包装材料には外観が悪く、光
沢の悪い、内部の商品価値を低下するような包装
体になつてしまう。
本発明において基層フイルム(A)を形成するのに
用いる低分子量熱可塑性樹脂とは、共に混合する
ポリプロピレン系重合体と混和性の良好な混合物
を形成し、軟化点（ASTM−D36−26による測
定）が70℃〜150℃の範囲にあり、150℃以上で熱
的に安定であり、好ましくは200℃で約20000セン
チポイズ以下の溶融粘度を有する樹脂を指す。こ
こに“混和性”とはポリプロピレンと記記低分子
量熱可塑性樹脂とを混合した場合に層分離を起こ
さないことを意味する。また“熱的に安定”とは
空気の存在下、所定の温度で１時間加熱後でも、
樹脂の性質に永久的な変化が起こらないことを意
味する。更に溶融粘度は、ブルツクフイールド粘
度計を用いて指示された高温度にまで加熱し、
ASTM試験法D1824−66によつて測定されたも
のである。
本発明における低分子量熱可塑性樹脂としては
炭化水素樹脂、ロジン、ダンマル、フエノール樹
脂、塩素化脂肪族炭化水素ワツクス、塩素化多核
芳香族炭化水素などがある。
“炭化水素樹脂”とは、コークス炉ガス、コー
ルタール留分、分解および深分解された石油原
料、本質的に純粋な炭化水素原料またはテレビン
油から誘導される炭化水素重合体をいい、典型的
な炭化水素樹脂としては、例えばクマロン−イン
デン樹脂、石油樹脂、スチレン樹脂、シクロペン
タジエン樹脂、テルペン樹脂等がある。これらの
樹脂はカーク・オスマー「エンサイクロベデイ
ア・オブ・ケミカル・テクノロジー」第２版第11
巻242〜255頁（1966年）に記載されている。
“クマロン−インデン樹脂”とは、コークス炉
ガスから回収されるか、コールタールの蒸留物中
に存在する樹脂形成物の重合により得られる炭化
水素樹脂、フエノール変性クマロン−インデン樹
脂またはそれらの誘導体をいい、これらの樹脂は
上記文献第２版第11巻243〜247頁に記載されてい
る。
“石油樹脂”とは、深分解された石油原料を触
媒重合することにより得られる炭化水素樹脂をい
い、これら石油原料は一般にスチレン、メチルス
チレン、ビニルトルエン、インデン、メチルイン
デン、ブタジエン、イソプレン、ピペリレン、ベ
ンチレンのような樹脂形成物の混合物を含有して
いる。
この樹脂は上記文献第２版第11巻第248〜250頁
に記載されている。
“スチレン重合体”とは、スチレンの低分子量
ホモポリマー、スチレンと例えばα−メチルスチ
レン、ビニルトルエン、ブタジエン等を含有する
コポリマーをいう。
“シクロペンタジエン樹脂”とは、コールター
ル留分または分解石油ガスから誘導されるシクロ
ペンタジエンホモポリマーおよびコポリマーをい
う。これらの樹脂はシクロペンタジエン含有原料
を高温でかなり長時間保持することにより製造さ
れる。保持される温度により２量体、３量体また
は高重合体のいずれかが得られる。これらの樹脂
は上記文献第２版第11巻250〜251頁に記載されて
いる。
“テルペン樹脂”とは、ほとんどの精油および
植物の含油樹脂中に存在する一般式C10H16の炭
化水素であるテルペン類の重合体およびフエノー
ル変性テルペン樹脂をいう。好適なテルペンとし
ては例えばα−ピネン、β−ピネン、ジペンテ
ル、リモネン、ミルセン、ボルニレン、カンフエ
ンおよびその類似テルペンが挙げられる。この樹
脂は上記文献第２版第11巻252〜254頁に記載され
ている。
“ロジン”とは、松の木の含油樹脂中に天然に
存在する樹脂状物質およびロジンエステル、変性
ロジン例えば分留、水添、脱水素またはその類似
物をいう。これらの物質は上記文献第17巻475〜
505頁に記載されている。
“ダンマル”とは、ふたばがき科、かんらん科
等の植物中に天然に存在する無色ないし黄色の物
質またはその類似物をいい、この物質は共立出版
社“化学大辞典”第５巻776頁（昭和36年出版）
に記載されている。
“フエノール樹脂”とは、フエノール類とアル
デヒド類との反応生成物をいう。フエノール自体
のほかにクレゾール、キシレノール、ｐ−タ−シ
ヤリーブチルフエノール、ｐ−フエニルフエノー
ルまたはその類似物がフエノール成分として挙げ
られ、ホルムアルデヒドが最も普通のアルデヒド
であるが、アセトアルデヒド、フルフラールアル
デヒド等がアルデヒドとして挙げられる。これら
の樹脂は上記エンサイクロペデイア第15巻176〜
207頁に記載されている。
“塩素化脂肪族炭化水素ワツクス”とは、通常
“塩素化ワツクス”といわれる塩素化パラフイン
ワツクスのようなものをいい、代表的なものは塩
素を約30〜70重量％含有する。
“塩素化多核芳香族炭化水素”とは、２種もし
くはそれ以上の塩素化ビフエニル、ターフエニル
等またはそれらの混合物のように２種もしくはそ
れ以上の芳香族環を持つ塩素化炭化水素をいう。
代表的なものは塩素を約30〜70重量％含有する。
本発明における基層(A)は更にその性質を低下さ
せない量の他の重合体を含有してもよく、また帯
電防止剤、滑剤、ブロツキング防止剤等を含有し
てもよい。
密封包装体を得る為に、自動包装機の包装材料
供給部でフイルムが静電気により吸着したりカツ
ターの刃に巻付いたり、案内板に静電引力により
引張られたりしてその為に包装材料の供給が一定
且つ真直ぐに被包装物に届かないようなことは避
けなければならない。この点に関し、本発明者等
は次の新らしい事実を発見した。即ち、前記の自
動包装機による静電気発生の現象はフイルムの基
層に帯電防止剤を混合することにより、著しく改
善出来るのである。
本発明においては、上記基層(A)の少なくとも片
面の表面にエチレン−プロピレン共重合体86〜95
（重量）％とブテン−エチレン共重合体80〜15（重
量）％とを有する重合体混合物により形成された
表面層(B)を形成する。表面層(B)は基層(A)の少なく
とも片面に積層され強固に接着している。Ｂ層に
用いるエチレン／プロピレン共重合体はエチレン
含有量が0.5（重量）％〜10（重量）％の範囲内で
ある。そして、その溶融指数が0.5〜10（ｇ／10
分）の重合体であるのが好ましい。さらに好まし
くは、共重合体のエチレン含有量が2.3〜６（重
量）％のランダム共重合体であり、溶融指数は
1.0〜６（ｇ／10分）である。エチレン含有量が
0.5（重量）％では低温ヒートシール性に乏しく、
透明性、光沢共に悪くなり、本発明の目的である
高透明、高光沢のフイルムが得られない。又、エ
チレン含有量が10（重量）％以上となると、ヒー
トシール部のスクラツチ性、熱板離脱性が悪化す
る欠点を有し、包装体に皺、スクラツチを生じ、
密封包装体を得ることが出来なくなる。Ｂ層を形
成するブテン−エチレン共重合体はブテンを70
（重量）％〜99（重量）％含有しており、エチレン
系不飽和結合を有するモノマー（ブテンを除く）
は炭素数が２〜10（炭素数４は除く）である共重
合成分を含有した共重合体である。上記共重合体
に於いてブテンの含有量が70（重量）％以下であ
ると低温ヒートシール性が悪くなり、且つ高温時
の摩擦係数が高く高温摩擦係数が1.4を越えてし
まいヒートシール時、滑り不良によるフイルム又
はシートにスクラツチや皺を生じ自動包装機を用
いて密封包装体は得にくい。また、前記逐次２軸
延伸を行なう場合、加熱延伸ロールへの粘着、融
着を生じ易く、商業的に平滑で傷のない外観の優
れたフイルム又はシートで包装された包装体を得
る事が出来ない。また低温ヒートシール性にも劣
るのである。又ブテンの含有量が99（重量）％以
上であるとフイルムの透明性が悪く、高度な透明
性、光沢に富んだ内容物が良く見える包装体とす
る事は出来ない。この１例は第３図に示す例から
も明らかである。
上記エチレン／プロピレン共重合体とブテン−
エチレン共重合体の混合比は前者が86〜95（重量）
％、後者が14〜５（重量）％である。
該重合体混合物100（重量）部に対しシリコン系
オイルを0.01〜0.15（重量）部配合することは本
発明において好ましいことである。
本発明に用い得るシリコン系オイルはポリジメ
チルポリシロキサン、ポリメチルフエニルシロキ
サン、オレフイン変性シリコーン、ポリエチレン
グリコールやポリプロピレングリコールで変性し
たポリエーテル変性シリコン、オレフイン／ポリ
エーテル変性シリコン、エポキシ変性シリコン、
アミノ変性シリコン、アルコール変性シリコン等
変性されたシロキサン結合を含有したシリコン系
オイルである。該シリコン系オイル中特にオレフ
イン変性シリコン、ポリエーテル変性シリコン、
オレフイン／ポリエーテル変性シリコン等が優れ
ている。該シリコン系オイルは加熱状態でのフイ
ルムの摩擦係数を改良し、自動包装機による熱板
シール中に生じる摺動抵抗を低下させ皺の発生を
防止することにより、美しい外観と高度な密封性
と被包装体にたるみない密着性とを有する包装体
を得ることが出来る。又摺動による光沢の低下を
防止して、美しいシール部を得る事が出来る。シ
リコン系オイルを併用した場合の本発明では摺動
ヒートシールをする場合高温摩擦係数を１、４以
下にすることが出来る。上記目的を達成する為に
重要な要件である。該シリコン系オイルは常温に
於ける粘度が50〜10000センチトークスの範囲内
が好ましく、更に好ましくは50〜300センチスト
ークスの低粘度のものがよい。該シリコン系オイ
ルに、更には軟化点70℃〜140℃の天然或いは合
成ワツクス、カスターオイルのエチレンオキサイ
ド付加物、酸化合成ワツクス、高級脂肪酸アルキ
ルエステル、多価アルコールアルキレートエチレ
ンオキサイド付加物、脂肪酸アマイド等を併用す
ることにより一層効果を高めることが出来る。こ
れ等の混合はシリコン系オイル100部に対し50部
から300部の範囲で用いることが望ましい。該添
加剤をシリコン系オイルに併用することにより、
シリコン系オイルのみの使用では生じがちな室温
〜100℃以下でのステイツクスリツプを防止し、
自動包装機の各種金属案内板との滑りを円滑にし
包装不良を未然に防ぎうる。更に高温加圧下での
滑りを改善し、熱板離脱性を向上させ、本発明の
密封包装体を得るのに極めて重要である。この具
体的数値が高温摩擦係数で1.4以下である。該シ
リコン系オイル及び上記添加剤等は良い面ばかり
ではなく、フイルム又はシートのヒートシール性
を低下させる傾向があり、透明性をも低下させる
傾向がある。従つて、単に添加するだけでは低温
ヒートシール性を低下させる傾向のためやや高温
でヒートシールすることになる。
一般に、自動包装機により高速、高温でヒート
シールするとフイルム又はシートの表面に傷を生
じ、且つ熱収縮が発生して平滑なシール面が得ら
れない。即ち、ポリプロピレン等の２軸延伸フイ
ルムでは結晶性、融点共に高く、ポリ塩化ビニー
ル等の如く均一な収縮は得られない。ポリプロピ
レン２軸延伸フイルムの場合は熱板に接触した部
分が収縮し、接触状態によつて極めて凹凸のある
シール面しか得られないのである。この現象は本
発明の目的である密封包装体に対し凹凸の発生に
よる部分的なシール不良を生じ気密度の高い包装
は期待出来ない。これ等の密封包装体を得るため
には上記の如く、低温でヒートシール出来ること
は勿論、加熱状態での摩擦係数が低いことが必要
である。
さらに、シール体を100℃に保持したときのシ
ール強度の保持率が60％以上、好ましくは80％以
上有しており、更にその上120℃における摩擦係
数が1.4以下であることが必要である。
本発明の包装材料はＡ層、Ｂ層の接着は接着剤
を用いて複合することも出来るが、最も経済的に
はＡ層とＢ層を別個の押出機から押出し、溶融状
態で複合流をつくり押出成形する共押出法、或い
は別個に溶融押出して後冷却固化するより前にラ
ミネートする方法、又は一方が冷却固化したフイ
ルム又はシートに他方の溶融押出状態のフイルム
を接着する方法等の複合状のフイルム又はシート
を得る方法で得ることができる本方法は平板状フ
イルム、円環状フイルムのいづれでもよく、本発
明は未延伸でも用いうるが少なくとも一軸延伸す
ることが好ましい。特に好ましくは２軸延伸する
ことにより一層有効な密封材料を提供する。
本発明に用いる包装材料の特徴は加熱ロールを
縦延伸時に用いる逐次２軸延伸法においても製造
出来る点にあり、勿論同時延伸でも一層容易であ
る。逐次２軸延伸では層間に強固な複合層の結合
力を得て良好なヒートシール強度を有する包装材
料を得ることが出来、且つ経済的に積層体を生産
しうる点から本発明における積層フイルムの意義
は極めて高い。
延伸する場合の好適な条件を次に述べる。１軸
延伸する場合には縦方向あるいは横方向に3.5〜
10倍延伸する。延伸温度はロール延伸する場合は
100〜160℃、テンター延伸する場合は140〜165℃
であるのが通常である。本発明においてはフイル
ムを逐次２軸延伸する場合は縦方向に3.5〜10倍、
好ましくは3.8〜7.5倍、横方向には４〜12倍、好
ましくは６〜９倍延伸する。同時２軸延伸する場
合は140〜165℃で行なう。逐次２軸延伸する場合
は第１段は100℃〜160℃、好ましくは110℃〜130
℃、第２段は140℃〜165℃、好ましくは145℃〜
160℃である。熱固定は１軸延伸後あるいは２軸
延伸後に行ない、その温度は上記延伸温度以上で
あり、かつ140℃〜167℃で１秒〜１分程度であ
る。得られた積層フイルムは表面層(B)同士を向合
せて熱溶融接着させるのが通常であるが、基層(A)
と表面層(B)とを熱溶融接着させることも必要に応
じて行なうことも含むものである。
密封包装体としては、被包装物を直ちに前述の
積層包装材料で密封包装する場合、あるいは被包
装物をあらかじめ一定数量づつ箱体に収納してか
ら該箱体を１ないし多数個まとめて前述の積層包
装材料で密封包装する場合がある。いずれの場合
も外気が内容物側と流通しないように積層包装材
料が熱溶融接着されておればよい。
本発明で用いる積層包装材料の厚さの範囲はそ
の密封包装体としての用途に応じて決められるが
通常５〜150μの範囲である。繁用されるのは15
〜60μの範囲である。かつ、その表面層(B)の合計
厚みは積層包装材料全体の厚みの0.2〜50％の範
囲である。自動包装機により密封包装体とする場
合には上記の厚み比を満足しかつ個々の表面層の
厚みが0.2〜10μ特に0.2〜3μである範囲が好まし
い。なお、自動包装機には加熱加圧摺動熱接着方
式と加熱押圧熱接着方式とがあるが加熱摺動熱接
着方式を使用する場合には個々の表面層の厚みが
0.2〜3μの範囲であるのが特に好適である。一般
的には包装速度は30ケ／分〜500ケ／分であり、
特に普及型では50〜300ケ／分であるのが現状で
ある。ヒートシール温度は120℃〜190℃で、好ま
しくは130〜180℃位で使われる場合が多い。加熱
時間は、繰返し加熱される場合もあるので単純に
表現できないが、一加熱単位で表わすと0.05〜
2.0秒程度であり、一般的に多いケースとして0.2
〜1.0秒程度が普及している。
本発明包装体においては、本発明において用い
る積層フイルム同士のみでなく、他の熱接着可能
な面との接着、例えばポリプロピレンラミネート
フイルム、ポリエチレンラミネートフイルム、ポ
リブテンラミネート板等との接着により得ること
ができる包装体をも含むものである。
本発明の実施例を述べる前に評価方法を述べ
る。
(1) 摩擦係数
(イ) 常温摩擦係数
20℃×65％RHにおいて、ASTM−D1894
により測定
(ロ) 高温摩擦係数
120℃に加熱された熱板上に弗化ビニリデ
ン製の粘着テープを貼りつけ、該面とフイル
ム又はシートに4.5ｇ／cm2の垂直荷重をかけ
２ｍ／secの摺動速度で摺動させた場合の摩
擦係数である。
(2) ヒートシール強度
東洋精機製熱傾斜ヒートシーラーにより圧力
１Kg／cm2、0.5秒間の条件下でヒートシールし
た後にその強度を200mm／minの速度で剥離強
度を測定した。
(3) 密封包装度
自動包装機により50℃、100個／minの包装
条件でシールされた部分の密封性を水漏れ量に
より判断した。箱状に形成された外装体に水道
水に界面活性剤を0.2wt％混合した液を50c.c.入
れ、１分間に漏れる量を測定した。
グラス 水漏れ量
Ａ 0〜10c.c.／min
Ｂ 11〜20 〃
Ｃ 21〜30 〃
Ｄ 31〜50 〃
Ｅ 50 〃 以上
(4) 曇価JIS−K6714に従い、東洋精機製「ヘー
ズ・テスター」で測定した。
(5) グロス；JIS−Z8714に従い測定した。
(6) ヒートシール部の皺
Ａ 全く皺がない。
Ｂ 僅かにあるが美しい。
Ｃ 皺が部分的にある。
Ｄ 皺が多い。
Ｅ 全面に皺がある。
(7) 包装不良率
ヒートシール温度150℃×100個／分で包装
後、包装体の中からランダムに200個の取出し、
折込不良、シール不良、被包装体への密着包装
が出来なかつた不良品、ピンホールによる不良
品等の不良品個数を数え、200個で割つて求め
た値をパーセントで表わした。
(8) 自動供給性
東京自動機社製のＷ−37型自動包装機におい
て、100ケ／分の包装速度で、包装したときの
１分間連続自動供給の実態により下記の如く評
価した。
〇印 実用上自動供給に問題なし（スムーズに
供給する）
△印 自動供給に問題あり
×印 カツターに巻きついたり、カツト後、自
動的に供給出来ず、機械の案内板に静電気で密
着し、自動運転出来ないもの
実施例 １
基層(A)として固有粘度2.0dl／ｇ（135℃テトラ
リン溶液使用）のアイソタクテイツクポリプロピ
レン90（重量）％と石油樹脂（荒川林産社製、ア
ルコンＰ−115）10（重量）％からなる混合組成物
の100（重量）部に対し、グリセリンのステアリン
酸エステルを0.5（重量）部ポリオキシエチレンス
テアリルアミン0.4（重量）部を混合した組成とし
た。
一方表面層(B)としてエチレン4.5（重量）％のエ
チレン−プロピレン共重合体（メルトインデツク
ス2.0ｇ／10分）90（重量）％とブテン含有率96
（重量）％のブテン−１／エチレン共重合体10（重
量）％の重合体混合物100（重量）部にポリプロピ
レングリコール変性シリコン（20℃での粘度が
100センサストークス）を0.04（重量）部、カスタ
ーオイルエチレンオキサイド付加物0.02（重量）
部、ポリエチレンワツクス（分子量2000）0.1（重
量）部、グリセリン脂肪酸エステル0.3（重量）
部、ヒドロキシステアロアミド（日本化成製、ダ
イアミドKH）0.3（重量）部を混合した組成物を
用いた。該Ａ及びＢ層の組成物を２台の押出機か
ら溶融押出し、Ｂ／Ａ／Ｂの３層未延伸フイルム
を得た。該未延伸フイルムは980μの厚みを有し、
130℃に於いて縦方向に4.5倍延伸し、引続いて横
方向に8.0倍延伸し、160℃で８％緩和熱固定を行
なつた後冷却し、厚さ22μ（表面層の厚み片面
0.8μ）の２軸延伸複合フイルムを得た。
このフイルムを小巾に細断し高さ70mm、巾55
mm、厚さ20mmの角箱の外装を加熱加圧摺動方式の
自動包装機により行なつた。外装包装は第１表記
載の温度で行ない、包装速度は100個／分であつ
た。
なお、Ｂ層の２種の重合体の混合割合を変化さ
せた場合のヒートシール強度と曇価のデータを第
１図に示す。このデータから、高透明でかつ適度
のヒートシール強度を保持するためにはEPCと
EBCとの混合割合が86〜95：14〜５が適してい
ることがわかる。また、シリコーンオイル添加量
を変化させた場合のヒートシール強度（シール温
度150℃）、曇価、高温摩擦係数のデータを第２図
に、密封包装度（ヒートシール温度165℃、包装
速度100ケ／分）のデータを第３図に示す。
比較例 １
実施例１の基層を形成する重合体組成物のみで
得た厚さ22μのポリプロピレン２軸延伸フイルム
の両面に塩化ビニリデンを主剤とし、これに滑
剤、帯電防止剤を混合して片面に1.5ｇ／m2の樹
脂固型分となるようにコーテイングし両面ヒート
シーラブル包装材を得た。この包装材料により実
施例１と同様に自動包装機により角箱を包装し
た。
比較例 ２
アイソタクテイツクポリプロピレン（固有粘度
2.0dl／ｇ）90（重量）％とロジン10（重量）％と
を混合し、溶融押出し、厚さ1400μの未延伸フイ
ルムを得た。引続いて140℃で縦方向に5.0倍延伸
し、150℃で８倍横方向に延伸して厚さ35μ（表面
層の厚み0.8μ）の２軸延伸し、次いで160℃で10
秒間熱固定し、両面にコロナ放電処理により漏れ
張力を40ダイン／cmに処理した。得られたフイル
ムにより実施例１と同様に自動包装により角箱を
包装した。
比較例 ３
プロピレン／ブテン−１（ブテン−１含有量10
重量％）共重合体を溶融押出して表面層とし、一
方アイソタクテイツクポリプロピレン（固有粘度
2.1dl／ｇ）を溶融押出して基体層とし、基体層
の両面に表面層を配しうるような３個のマニホー
ルドを有する多層ダイスを用いて、３層未延伸フ
イルムを得た。厚さ1110μの該フイルムを縦方向
に120℃で４倍、横方向に150℃で８倍に延伸に続
いて熱処理して厚さ約35μの２軸延伸フイルムを
得た。
この場合表面層の厚みは片面約0.8μであつた。
得られたフイルムにより実施例１と同様に自動包
装機により角箱を包装した。
比較例 ４
エチレン含有量4.5（重量）％のエチレン／プロ
ピレン共重合体（メルトインデツクス２ｇ／10
分）を表面層とした以外は比較例３と同様に複合
２軸延伸フイルムとした。得られたフイルムによ
り実施例１と同様に自動包装機により角箱を包装
した。
比較例 ５
実施例１の基層の両面にアイソタクテイツクポ
リプロピレン（固有粘度2.0dl／ｇ）50（重量）％
とポリブテン−１ 50（重量）％とを混合した組
成物を表層として用いた他は同様にして２軸延伸
フイルムを得、自動包装機により角箱を包装し
た。また、表面層の重合体の混合割合のみを変化
させた場合のヒートシール強度を第４図に示す。
The present invention provides a laminated material or a package for an article, particularly a bag with good sealing performance, or a package in which a single article or a set of articles that have been packaged in a box or the like is re-sealed and packaged. be.
Furthermore, in the present invention, transparency is achieved by packaging with a packaging material that is excellent in properties such as low-temperature melt adhesion, sliding smoothness, hot plate detachability, and antistatic properties that are required when packaging products using an automatic packaging machine. To provide a sealed package with excellent gloss. In recent years, sophisticated demands have been placed on the exteriors of foods, cigarettes, industrial goods, daily necessities, etc. For example, in food packaging, in addition to the characteristics of the exterior material such as moisture resistance, aroma retention, insect repellency, and oxygen barrier properties, there are also problems such as insufficient sealing of the thermally bonded part during packaging, insufficient adhesive strength, and folds due to wrinkles in the packaging material. Problems caused by poor airtightness are becoming more and more important. Additionally, the industry is making desperate efforts to reduce the amount of residual solvent in packaging materials due to hygiene concerns. On the other hand, as automatic packaging machines have become increasingly faster and more efficient, the following characteristics are required for use in automatic packaging machines. Sliding properties between the packaging material and the metal guide of the automatic packaging machine, ease of separating the packaging material from the hot plate, prevention of scratches due to sliding between the packaging material and the automatic packaging machine, and automatic transfer of the packaging material to the automatic packaging machine. supplyability. Packaging materials with heat-sealing properties include coating films manufactured by dissolving low-melting substances in organic solvents and coating them on a base film, single films obtained by mixing low-melting polymers with polypropylene, etc. A laminated film in which a melting point polymer is laminated on a base film so that the laminated surface of the low melting point polymer is placed on the heat sealing surface, or a single film in which a low molecular weight thermoplastic resin or the like is mixed with polypropylene or the like has been proposed. However, the film obtained by the coating method has a weak sealing strength when heated, making it unsuitable for the sealed package of the present invention, and furthermore, it is difficult to eliminate any residual solvent on the coating surface. It can be given as A film obtained by mixing a low melting point polymer with polypropylene or the like has poor low-temperature sealing properties and may have poor transparency. In addition, since the film is flexible, its stiffness and rigidity are low, making it difficult to wrap it continuously using an automatic packaging machine. Furthermore, although a film mixed with a low molecular weight thermoplastic resin has a sealing strength, it has the disadvantage that the strength decreases as it is heated, making it difficult to obtain a package with excellent sealing. A method of laminating a low melting point polymer on a base film has also been attempted, but as with the case of mixing low melting point polymers, when sequential biaxial stretching is performed, the film is fused to the rolls during stretching with heated rolls. . For this reason, in practice we have no choice but to cold stretch,
A transparent film cannot be obtained under such conditions.
For example, as seen in Japanese Patent Publication No. 41-4338, the result is a film with pearl-like luster. For this reason, the low melting point polymer is laminated on one or both sides of the film that serves as the base after being longitudinally stretched using heated rolls, and the film is stretched using a tenter so as not to come into contact with the surface that is likely to be fused. methods are being taken. However, low melting point polymers are susceptible to thermal and mechanical damage, often impairing their transparency. Packaging materials made of films obtained by sequential biaxial stretching are the most economical method of supplying materials because of their thickness accuracy and high productivity. On the other hand, requiring excessive heat-sealing strength often impairs transparency. The present invention aims to provide a packaging body using a packaging material that maintains these basic characteristics as a packaging material and has a high degree of transparency and gloss. In response to these demands, we have arrived at the present invention as a result of intensive research in order to provide a sealed package on the market. That is, in the present invention, at least one surface of the base layer (A) formed of a polypropylene polymer is made of an ethylene-propylene copolymer (ethylene content 0.5
-10% by weight) 86-95% (by weight) and butene-ethylene copolymer (butene content 70-99% by weight) 14-5
(wt)%, and the total thickness of the surface layer is 0.2 to 50% of the whole, and the thickness of each individual surface layer is
This is a package with good sealing properties, characterized in that the article is packaged by thermally adhering at least two layers of laminated film having a thickness of 0.2 to 10μ. The polypropylene polymer forming the base film layer (A) has a melting point of 140°C or higher, preferably 150°C.
Polymers mainly composed of the above propylene, such as isotactic polypropylene with an isotactic index of 85% (by weight) or more, ethylene/propylene copolymers with an ethylene content of 7% (by weight) or less, and propylene with an isotactic index of 90% (by weight) or less. (weight)% or more of propylene and an α-olefin having 4 to 6 carbon atoms as a main component, or a mixture of these polymers. The polypropylene polymer preferably has an intrinsic viscosity (tetralin solution at 135°C) of 1.6 to 3.0 dl/g. In particular, it is preferably 1.8 to 2.5 dl/g. If the intrinsic viscosity is less than 1.6 dl/g, it is impossible to obtain a transparent packaging material, and if it exceeds 3.0 dl/g, the extrudability decreases, making it particularly difficult to obtain a packaging material for a composite packaging body suitable as the present invention. The result is a package that has a poor appearance, poor gloss, and lowers the product value inside. In the present invention, the low molecular weight thermoplastic resin used to form the base film (A) forms a mixture with good miscibility with the polypropylene polymer to be mixed together, and has a softening point (measured by ASTM-D36-26). ) is in the range of 70°C to 150°C, is thermally stable above 150°C, and preferably has a melt viscosity of about 20,000 centipoise or less at 200°C. The term "miscible" as used herein means that no layer separation occurs when polypropylene and the low molecular weight thermoplastic resin are mixed. Also, "thermally stable" means that even after heating at a specified temperature in the presence of air for 1 hour,
This means that no permanent changes occur in the properties of the resin. Furthermore, the melt viscosity is determined by heating to the specified high temperature using a Bruckfield viscometer.
Measured according to ASTM test method D1824-66. Examples of the low molecular weight thermoplastic resin in the present invention include hydrocarbon resins, rosin, dammar, phenolic resins, chlorinated aliphatic hydrocarbon waxes, and chlorinated polynuclear aromatic hydrocarbons. “Hydrocarbon resin” means a hydrocarbon polymer derived from coke oven gas, coal tar fractions, cracked and deep-cracked petroleum feedstocks, essentially pure hydrocarbon feedstocks or turpentine; Examples of the hydrocarbon resin include coumaron-indene resin, petroleum resin, styrene resin, cyclopentadiene resin, and terpene resin. These resins are described in Kirk Othmer's Encyclopedia of Chemical Technology, 2nd Edition, No. 11.
Volume 242-255 (1966). "Coumaron-indene resin" means a hydrocarbon resin recovered from coke oven gas or obtained by polymerization of resin formations present in coal tar distillate, phenol-modified coumaron-indene resin or derivatives thereof. These resins are described in the above-mentioned document, 2nd edition, Vol. 11, pp. 243-247. "Petroleum resin" refers to a hydrocarbon resin obtained by catalytic polymerization of deeply cracked petroleum raw materials, and these petroleum raw materials generally include styrene, methylstyrene, vinyltoluene, indene, methylindene, butadiene, isoprene, and piperylene. , containing a mixture of resin formers such as Benthrene. This resin is described in the above-mentioned document, 2nd edition, volume 11, pages 248-250. "Styrenic polymer" refers to low molecular weight homopolymers of styrene, copolymers containing styrene and, for example, alpha-methylstyrene, vinyltoluene, butadiene, and the like. "Cyclopentadiene resin" refers to cyclopentadiene homopolymers and copolymers derived from coal tar fractions or cracked petroleum gas. These resins are produced by holding cyclopentadiene-containing raw materials at elevated temperatures for considerable periods of time. Depending on the temperature maintained, either dimers, trimers or high polymers are obtained. These resins are described in the above-mentioned document, 2nd edition, volume 11, pages 250-251. "Terpene resin" refers to polymers of terpenes, which are hydrocarbons of the general formula C 10 H 16 present in most essential oils and plant oleoresins, and phenol-modified terpene resins. Suitable terpenes include, for example, α-pinene, β-pinene, dipentel, limonene, myrcene, bornylene, camphuene and similar terpenes. This resin is described in the above-mentioned document, 2nd edition, volume 11, pages 252-254. "Rosin" refers to resinous substances naturally occurring in pine tree oleoresins and rosin esters, modified rosins such as fractionated, hydrogenated, dehydrogenated or the like. These substances are described in the above-mentioned document, Vol. 17, 475-
It is described on page 505. “Danmaru” refers to a colorless to yellow substance or its analogues that naturally exist in plants such as Futabaraceae and Orchidaceae. (Published in 1962)
It is described in. "Phenol resin" refers to a reaction product of phenols and aldehydes. In addition to phenol itself, cresol, xylenol, p-tert-butylphenol, p-phenylphenol, or their analogues may be mentioned as phenolic components, with formaldehyde being the most common aldehyde, but acetaldehyde, furfuraldehyde, etc. Listed as aldehydes. These resins are listed in the Encyclopedia Volume 15, 176~
It is described on page 207. "Chlorinated aliphatic hydrocarbon wax" refers to something like chlorinated paraffin wax, which is usually called "chlorinated wax," and a typical wax contains about 30 to 70% by weight of chlorine. "Chlorinated polynuclear aromatic hydrocarbon" refers to a chlorinated hydrocarbon having two or more aromatic rings, such as two or more chlorinated biphenyl, terphenyl, etc., or a mixture thereof.
Typical ones contain about 30-70% chlorine by weight. The base layer (A) in the present invention may further contain other polymers in amounts that do not deteriorate its properties, and may also contain antistatic agents, lubricants, antiblocking agents, and the like. In order to obtain a sealed package, in the packaging material supply section of an automatic packaging machine, the film is attracted by static electricity, wrapped around the cutter blade, or pulled by the guide plate by electrostatic attraction, which causes the packaging material to It must be avoided that the supply does not reach the packaged item in a constant and direct manner. Regarding this point, the present inventors discovered the following new fact. That is, the phenomenon of static electricity generated by automatic packaging machines can be significantly improved by incorporating an antistatic agent into the base layer of the film. In the present invention, at least one surface of the base layer (A) is coated with 86 to 95 ethylene-propylene copolymer.
% (by weight) and 80-15% (by weight) of butene-ethylene copolymer. The surface layer (B) is laminated on at least one side of the base layer (A) and is firmly adhered to it. The ethylene/propylene copolymer used for layer B has an ethylene content in the range of 0.5% (by weight) to 10% (by weight). And its melting index is 0.5~10 (g/10
Preferably, it is a polymer of More preferably, the copolymer is a random copolymer with an ethylene content of 2.3 to 6% (by weight), and a melting index of
It is 1.0 to 6 (g/10 minutes). Ethylene content
At 0.5% (by weight), low-temperature heat sealability is poor;
Both transparency and gloss deteriorate, making it impossible to obtain a film with high transparency and high gloss, which is the object of the present invention. Furthermore, if the ethylene content exceeds 10% (by weight), the scratching properties of the heat-sealed part and the detachability from the hot plate will deteriorate, causing wrinkles and scratches on the package.
It becomes impossible to obtain a sealed package. The butene-ethylene copolymer forming the B layer contains 70% butene.
(wt)% to 99 (wt)% of monomers containing ethylenically unsaturated bonds (excluding butene)
is a copolymer containing a copolymer component having 2 to 10 carbon atoms (excluding 4 carbon atoms). If the butene content in the above copolymer is less than 70% (by weight), the low temperature heat sealability will be poor, and the friction coefficient at high temperatures will be high and the high temperature friction coefficient will exceed 1.4. Scratches and wrinkles occur in the film or sheet due to poor slippage, making it difficult to obtain a sealed package using an automatic packaging machine. Furthermore, when performing the above-mentioned sequential biaxial stretching, adhesion and fusion to the heated stretching rolls tend to occur, and it is difficult to obtain a package wrapped with a film or sheet that is smooth and has an excellent appearance without scratches for commercial purposes. do not have. It also has poor low-temperature heat sealability. If the content of butene is 99% (by weight) or more, the transparency of the film will be poor and it will not be possible to provide a highly transparent, glossy package in which the contents can be clearly seen. One example of this is clear from the example shown in FIG. The above ethylene/propylene copolymer and butene
The mixing ratio of ethylene copolymer is 86 to 95 (weight) for the former.
%, the latter being 14-5% (by weight). In the present invention, it is preferable to blend 0.01 to 0.15 parts (by weight) of silicone oil to 100 parts (by weight) of the polymer mixture. Silicone oils that can be used in the present invention include polydimethylpolysiloxane, polymethylphenylsiloxane, olefin-modified silicone, polyether-modified silicone modified with polyethylene glycol or polypropylene glycol, olefin/polyether-modified silicone, epoxy-modified silicone,
Silicone oil containing modified siloxane bonds such as amino-modified silicone and alcohol-modified silicone. Among the silicone oils, especially olefin-modified silicone, polyether-modified silicone,
Olefin/polyether modified silicone etc. are excellent. The silicone oil improves the coefficient of friction of the film when heated, reduces the sliding resistance that occurs during hot plate sealing in automatic packaging machines, and prevents wrinkles, resulting in a beautiful appearance and high sealing performance. It is possible to obtain a package that has tight adhesion to the packaged object without sagging. In addition, it is possible to prevent a decrease in gloss due to sliding and obtain a beautiful seal. In the present invention when silicone oil is used in combination, the high temperature friction coefficient can be reduced to 1.4 or less when performing sliding heat sealing. This is an important requirement to achieve the above purpose. The silicone oil preferably has a viscosity of 50 to 10,000 centistokes at room temperature, more preferably a low viscosity of 50 to 300 centistokes. In addition to the silicone oil, natural or synthetic waxes with a softening point of 70°C to 140°C, ethylene oxide adducts of castor oil, oxidized synthetic waxes, higher fatty acid alkyl esters, polyhydric alcohol alkylate ethylene oxide adducts, fatty acid amide The effect can be further enhanced by using these in combination. It is desirable to use a mixture of these in a range of 50 to 300 parts per 100 parts of silicone oil. By using this additive in combination with silicone oil,
Prevents stick slip at room temperature to below 100℃, which tends to occur when using only silicone oil.
It can smoothly slide on various metal guide plates of automatic packaging machines and prevent packaging defects. Furthermore, it improves the slippage under high temperature and pressure, and improves the hot plate detachability, which is extremely important for obtaining the sealed package of the present invention. This specific value is the high temperature friction coefficient of 1.4 or less. The silicone oil and the above-mentioned additives are not only good, but also tend to reduce the heat sealability of the film or sheet, and also tend to reduce the transparency. Therefore, simply adding it tends to reduce the low-temperature heat-sealing properties, resulting in heat-sealing at a slightly higher temperature. Generally, when heat sealing is performed at high speed and high temperature using an automatic packaging machine, the surface of the film or sheet is damaged and thermal shrinkage occurs, making it impossible to obtain a smooth sealing surface. That is, biaxially stretched films such as polypropylene have high crystallinity and melting point, and cannot achieve uniform shrinkage like polyvinyl chloride and the like. In the case of biaxially stretched polypropylene film, the portion that comes into contact with the hot plate contracts, and depending on the contact conditions, a sealing surface that is extremely uneven can be obtained. This phenomenon causes a partial seal failure due to the occurrence of unevenness in the sealed package, which is the object of the present invention, and a highly airtight package cannot be expected. In order to obtain these sealed packages, as mentioned above, it is necessary not only to be able to heat seal at low temperatures but also to have a low coefficient of friction in a heated state. Furthermore, the seal strength retention rate when the seal body is held at 100°C must be 60% or more, preferably 80% or more, and furthermore, the coefficient of friction at 120°C must be 1.4 or less. . In the packaging material of the present invention, layers A and B can be bonded together using an adhesive, but the most economical method is to extrude layers A and B from separate extruders and form a composite flow in the molten state. A composite method such as a co-extrusion method of extrusion molding, a method of laminating the film or sheet before separately melt-extruding and cooling and solidifying, or a method of gluing one film or sheet that has been cooled and solidified to the other film that has been melt-extruded. This method can be used to obtain either a flat film or an annular film, and although the present invention can be used without stretching, it is preferable to stretch the film at least uniaxially. Particularly preferably, biaxial stretching provides a more effective sealing material. A feature of the packaging material used in the present invention is that it can be manufactured by a sequential biaxial stretching method using heated rolls during longitudinal stretching, and of course simultaneous stretching is even easier. The laminated film of the present invention is advantageous because sequential biaxial stretching can obtain a packaging material with good heat-sealing strength by obtaining a strong composite layer binding force between the layers, and can produce a laminate economically. The significance is extremely high. Suitable conditions for stretching will be described below. When stretching uniaxially, it is 3.5 to 3.5 in the vertical or horizontal direction.
Stretch 10 times. Stretching temperature for roll stretching
100-160℃, 140-165℃ for tenter stretching
This is usually the case. In the present invention, when the film is sequentially stretched biaxially, 3.5 to 10 times in the longitudinal direction,
It is preferably stretched 3.8 to 7.5 times, 4 to 12 times in the transverse direction, preferably 6 to 9 times. When simultaneous biaxial stretching is carried out, it is carried out at 140 to 165°C. In the case of sequential biaxial stretching, the first stage is 100°C to 160°C, preferably 110°C to 130°C.
℃, the second stage is 140℃~165℃, preferably 145℃~
The temperature is 160℃. Heat setting is performed after uniaxial stretching or biaxial stretching, and the temperature is higher than the above-mentioned stretching temperature and is about 1 second to 1 minute at 140°C to 167°C. The resulting laminated film is usually bonded by heat melting with the surface layers (B) facing each other, but the base layer (A)
This also includes heat-melting bonding the surface layer (B) and the surface layer (B), if necessary. The hermetically sealed package can be used when the item to be packaged is immediately hermetically packaged using the above-mentioned laminated packaging material, or when the item to be packaged is stored in advance in a box in a certain quantity and then one or many boxes are packed together as described above. May be sealed in laminated packaging material. In either case, the laminated packaging material may be heat-melted and bonded so that outside air does not flow through the contents. The thickness range of the laminated packaging material used in the present invention is determined depending on its use as a sealed package, but is usually in the range of 5 to 150 microns. 15 are frequently used.
~60μ range. Moreover, the total thickness of the surface layer (B) is in the range of 0.2 to 50% of the thickness of the entire laminated packaging material. In the case of forming a sealed package using an automatic packaging machine, it is preferable that the above thickness ratio is satisfied and the thickness of each surface layer is in the range of 0.2 to 10 μm, particularly 0.2 to 3 μm. There are two types of automatic packaging machines: a heat-pressure sliding thermal adhesive method and a heat-pressing thermal adhesive method, but when using the heat-sliding thermal adhesive method, the thickness of each surface layer
A range of 0.2 to 3μ is particularly preferred. Generally, the packaging speed is 30 pieces/min to 500 pieces/min.
In particular, the current rate for popular types is 50 to 300 pieces/minute. The heat sealing temperature is 120°C to 190°C, preferably 130°C to 180°C. Heating time cannot be expressed simply because it may be heated repeatedly, but when expressed in one heating unit, it is 0.05 ~
It is about 2.0 seconds, and 0.2 seconds is the most common case.
~1.0 seconds is common. The package of the present invention can be obtained by bonding not only the laminated films used in the present invention to each other but also other heat-bondable surfaces, such as a polypropylene laminate film, a polyethylene laminate film, a polybutene laminate plate, etc. It also includes packaging. Before describing embodiments of the present invention, an evaluation method will be described. (1) Friction coefficient (a) Room temperature friction coefficient at 20℃ x 65%RH, ASTM-D1894
Measured by (b) High-temperature coefficient of friction A vinylidene fluoride adhesive tape was pasted on a hot plate heated to 120°C, and a vertical load of 4.5 g/cm 2 was applied to the surface and the film or sheet at a rate of 2 m/sec. This is the coefficient of friction when sliding at a sliding speed. (2) Heat-sealing strength After heat-sealing using a heat-inclined heat sealer manufactured by Toyo Seiki under a pressure of 1 Kg/cm 2 for 0.5 seconds, the peel strength was measured at a speed of 200 mm/min. (3) Sealing degree of packaging The sealing performance of the part sealed by an automatic packaging machine at 50°C and packaging conditions of 100 pieces/min was judged by the amount of water leakage. 50 c.c. of a mixture of tap water and 0.2 wt% surfactant was placed in a box-shaped exterior, and the amount leaked per minute was measured. Glass Water leakage amount A 0~10 c.c./min B 11~20 〃 C 21~30 〃 D 31~50 〃 E 50 〃 or more (4) Haze tester manufactured by Toyo Seiki according to haze value JIS-K6714 It was measured with (5) Gloss: Measured according to JIS-Z8714. (6) Wrinkles A on heat-sealed part There are no wrinkles at all. B There is a little bit, but it is beautiful. C There are some wrinkles. D There are many wrinkles. E There are wrinkles all over. (7) Packaging defect rate After packaging at a heat sealing temperature of 150℃ x 100 pieces/min, 200 pieces were randomly taken out from the package,
The number of defective products such as defective folding, poor sealing, defective products that could not be packaged tightly to the packaged object, and defective products due to pinholes was counted, and the value was calculated by dividing by 200 and expressed as a percentage. (8) Automatic feeding performance The following evaluation was made based on continuous automatic feeding for 1 minute when packaging at a packaging speed of 100 pieces/minute using a W-37 type automatic packaging machine manufactured by Tokyo Jidoki Co., Ltd. 〇 Mark: There is no problem in practical automatic feeding (feeds smoothly) △ mark: There is a problem in automatic feeding × Mark: It may wrap around the cutter, or it may not be able to feed automatically after cutting, and it may stick to the guide plate of the machine due to static electricity. Examples of things that cannot be operated automatically: 1 The base layer (A) is 90% (by weight) of isotactic polypropylene with an intrinsic viscosity of 2.0 dl/g (using tetralin solution at 135°C) and petroleum resin (Alcon P-115, manufactured by Arakawa Forestry Co., Ltd.). A composition was prepared in which 0.5 parts (by weight) of glycerin stearate and 0.4 parts (by weight) of polyoxyethylene stearylamine were mixed with 100 parts (by weight) of a mixed composition consisting of 10% (by weight). On the other hand, the surface layer (B) is an ethylene-propylene copolymer containing 4.5% (by weight) of ethylene (melt index 2.0 g/10 minutes) and 90% (by weight) and a butene content of 96%.
Polypropylene glycol-modified silicone (viscosity at 20°C
0.04 parts (by weight) of Castor oil ethylene oxide adduct (0.02 parts by weight)
part, polyethylene wax (molecular weight 2000) 0.1 part (weight), glycerin fatty acid ester 0.3 part (weight)
A composition was used in which 0.3 parts (by weight) of hydroxystearamide (Diamide KH, manufactured by Nippon Kasei) were mixed. The compositions of layers A and B were melt-extruded from two extruders to obtain a three-layer unstretched film of B/A/B. The unstretched film has a thickness of 980μ,
Stretched 4.5 times in the machine direction at 130°C, then 8.0 times in the transverse direction, 8% relaxation heat set at 160°C, cooled,
A biaxially stretched composite film of 0.8μ) was obtained. Cut this film into small pieces with a height of 70 mm and a width of 55 mm.
The packaging of square boxes with a thickness of 20 mm and 20 mm was carried out using an automatic packaging machine that uses heating and pressure sliding. The outer packaging was carried out at the temperature listed in Table 1, and the packaging speed was 100 pieces/min. Note that data on heat seal strength and haze value when the mixing ratio of the two types of polymers in layer B is changed is shown in FIG. From this data, in order to maintain high transparency and appropriate heat seal strength, EPC and
It can be seen that a mixing ratio of 86 to 95:14 to 5 with EBC is suitable. Figure 2 shows data on heat-sealing strength (sealing temperature 150℃), haze value, and high-temperature friction coefficient when the amount of silicone oil added is changed. Figure 3 shows the data for Comparative Example 1 A polypropylene biaxially stretched film with a thickness of 22μ obtained using only the polymer composition forming the base layer of Example 1 was coated on both sides with vinylidene chloride as the main ingredient, mixed with a lubricant and an antistatic agent, and coated on one side. A double-sided heat-sealable packaging material was obtained by coating to a resin solid content of 1.5 g/m 2 . A square box was packed using this packaging material using an automatic packaging machine in the same manner as in Example 1. Comparative example 2 Isotactic polypropylene (intrinsic viscosity
2.0dl/g) and 10% (by weight) rosin were mixed and melt-extruded to obtain an unstretched film with a thickness of 1400μ. Subsequently, the film was stretched 5.0 times in the machine direction at 140°C, stretched 8 times in the transverse direction at 150°C, and biaxially stretched to a thickness of 35 μm (surface layer thickness 0.8 μm), and then stretched at 160°C for 10 times.
After heat setting for seconds, both sides were treated with corona discharge treatment to a leakage tension of 40 dynes/cm. The obtained film was used to package a square box using automatic packaging in the same manner as in Example 1. Comparative example 3 Propylene/butene-1 (butene-1 content 10
(wt%) copolymer was melt extruded to form the surface layer, while isotactic polypropylene (intrinsic viscosity
A three-layer unstretched film was obtained using a multilayer die having three manifolds capable of disposing surface layers on both sides of the base layer. The film having a thickness of 1110 μm was stretched 4 times in the machine direction at 120° C. and 8 times in the transverse direction at 150° C., followed by heat treatment to obtain a biaxially stretched film with a thickness of about 35 μm. In this case, the thickness of the surface layer was approximately 0.8 μm on one side.
The obtained film was used to package square boxes using an automatic packaging machine in the same manner as in Example 1. Comparative Example 4 Ethylene/propylene copolymer with an ethylene content of 4.5% (by weight) (melt index 2g/10
A composite biaxially stretched film was prepared in the same manner as in Comparative Example 3 except that the surface layer was used as the surface layer. The obtained film was used to package square boxes using an automatic packaging machine in the same manner as in Example 1. Comparative Example 5 Isotactic polypropylene (intrinsic viscosity 2.0 dl/g) 50% (by weight) was applied to both sides of the base layer of Example 1.
A biaxially stretched film was obtained in the same manner except that a mixture of 50% (by weight) of polybutene and polybutene-1 was used as the surface layer, and the film was packaged into a square box using an automatic packaging machine. Further, FIG. 4 shows the heat seal strength when only the mixing ratio of the polymer in the surface layer was changed.
【表】
上記の如く、本発明品は密封度が高く、皺の少
ない透明性に優れた包装体であることが理解され
る。ヒートシール部においても透明性光沢度とも
優れており、熱板による損傷が少ないものが得ら
れている。
密封度の高さは、単にヒートシール強度が強い
だけでは決まらず、シール部の皺がないこと、折
込不良のないこと、熱板により軟化された面が面
状に溶融軟化密着して粘着摺動し、シール部がめ
くり上がつたりしないこと、加熱時によく滑つて
前記の皺、折込不良等を生成、助長させないとい
う挙動を示すこと、且つシール部は接着しないと
いけないこと、という矛盾した特性がないと達成
出来ない。
勿論ヒートシール強度の高いことは好ましい
が、密封包装体を得るにはむしろ上記の皺、折込
不良、フイルムの溶断によるピンホールの方が重
要であることを示している。
比較例１は包装作業性や外観は良好であるが、
本発明の主目的である密封包装度は極めて不良で
あり、被包装体として吸湿、虫害等を要求せず、
且つ軽重量のものに限定される。
比較例２は自動供給性悪く、機械にかけられな
い基本的欠陥を有する。なお、手動送りにより包
装したところ、シール部の皺、光沢、外観等優れ
ていた。しかしながらヒートシール強度が低い上
に、密封包装度は極めて悪く、比較例１と同様被
包装体は限定される。
比較例３は強いヒートシール強度を有するが、
高温滑りが極めて悪く皺が多発し、且つ被包装体
に密着して包装されないためにルーズな包装状態
になる。その上密封包装度は皺、シール部の粘着
によるめくり上がり等により不良であり、実用上
全く使用出来ない。
比較例４はやゝ皺は少ない傾向を示すが、低温
ヒートシール性が悪い。皺が発生し難い低温では
シール強度が低く密封包装体は得られず、シール
強度の向上する160℃以上のヒートシール温度で
包装すると皺が多くなり外観上も悪く、密封包装
体が得られない。従つて比較例２、３と同様不良
率は極めて高い。
比較例５はポリプロピレンとポリブテン−１と
の相溶性が不良で透明性が悪く、ヒートシール強
度も低い。高温滑り性が悪く従つて密封包装体も
得られず、包装不良率も高く実用に供し得ない。
比較例２〜５は自動供給性がない為、各々の表
面層にさらにアルキルアミンエチレンオキサイド
付加体（丸菱油化製デノン331）を表面層の全量
基準で0.8（重量）％混合して製膜した他は同様に
した場合の結果を表−２に示す。特に表−１と比
較して変化の著しい特性のみ示す。[Table] As shown above, it is understood that the product of the present invention has a high degree of sealing, has few wrinkles, and has excellent transparency. The heat-sealed portion also has excellent transparency and gloss, and is less likely to be damaged by the hot plate. A high degree of sealing is determined not only by strong heat-sealing strength, but also by ensuring that there are no wrinkles in the sealing area, no folding defects, and that the surface softened by the hot plate melts and adheres flatly to create an adhesive seal. There are contradictory issues: the seal part should not roll up or stick when heated, it should not slip easily during heating and cause the aforementioned wrinkles, folding defects, etc., and the seal part must be bonded. It cannot be achieved without the characteristics. Of course, it is preferable to have high heat-sealing strength, but this shows that the wrinkles, poor folding, and pinholes caused by film fusing are more important in obtaining a sealed package. Comparative Example 1 has good packaging workability and appearance, but
The degree of hermetic packaging, which is the main objective of the present invention, is extremely poor, and the packaged object does not require moisture absorption, insect damage, etc.
In addition, it is limited to light weight items. Comparative Example 2 has a basic defect in that it has poor automatic feedability and cannot be machined. In addition, when it was packaged by manual feeding, the wrinkles in the sealed portion, the gloss, and the appearance were excellent. However, the heat-sealing strength is low, and the degree of sealing is extremely poor, and as in Comparative Example 1, the number of objects to be packaged is limited. Comparative Example 3 has strong heat sealing strength, but
High-temperature slippage is extremely poor, wrinkles occur frequently, and the packaged product is loosely packaged because it is not packaged in close contact with the packaged object. Moreover, the sealability of the package is poor due to wrinkles and peeling due to adhesiveness of the seal, making it completely unusable for practical use. Comparative Example 4 tends to have fewer wrinkles, but has poor low-temperature heat sealability. At low temperatures, where wrinkles are difficult to form, the sealing strength is low and a sealed package cannot be obtained.If packaged at a heat-sealing temperature of 160°C or higher, where the sealing strength is improved, there will be many wrinkles and the appearance will be poor, making it impossible to obtain a sealed package. . Therefore, similar to Comparative Examples 2 and 3, the defect rate is extremely high. Comparative Example 5 had poor compatibility between polypropylene and polybutene-1, poor transparency, and low heat seal strength. The high-temperature slip properties are poor, so a sealed package cannot be obtained, and the packaging defect rate is high, making it unsuitable for practical use. Since Comparative Examples 2 to 5 do not have automatic feedability, each surface layer was further mixed with an alkylamine ethylene oxide adduct (Denon 331 manufactured by Marubishi Yuka Co., Ltd.) at 0.8% (by weight) based on the total amount of the surface layer. Table 2 shows the results obtained in the same manner except that the film was coated. In particular, only the characteristics that have significantly changed compared to Table 1 are shown.
【表】
実施例 ２
基層(A)は実施例１と同様とし、表面層(B)にエチ
レン含有量4.5（重量）％のエチレン／プロピレン
共重合体（MI＝2.5ｇ／10分）（EPC）とエチレ
ン含有量５（重量）％のエチレン／ブテン−１共
重合体（MI＝2.0ｇ／10分）（EBC）の混合比を
種々変更して重合体混合物を得た。この重合体混
合物100（重量）部に対しポリオフイン変性シリコ
ンを0.05（重量）部、ステアリン酸モノグリセリ
ド0.5（重量）部、ヒドロキシステアロアミド0.1
（重量）部、ポリエチレンワツクス0.3（重量）部
を混合した。その他は実施例１と同様にした。得
られた結果を表−３に示す。[Table] Example 2 The base layer (A) was the same as in Example 1, and the surface layer (B) was an ethylene/propylene copolymer with an ethylene content of 4.5% (by weight) (MI = 2.5 g/10 min) (EPC ) and an ethylene/butene-1 copolymer (MI=2.0 g/10 min) (EBC) having an ethylene content of 5% (by weight) were varied to obtain polymer mixtures. For 100 parts (by weight) of this polymer mixture, 0.05 part (by weight) of polyoffine-modified silicone, 0.5 part (by weight) of stearic acid monoglyceride, and 0.1 part by weight of hydroxystearamide.
(by weight) and 0.3 (by weight) part of polyethylene wax were mixed. The rest was the same as in Example 1. The results obtained are shown in Table 3.
【表】【table】
【表】
実施例 ３
実施例２（EPC／EBC＝90／10のもの）におい
て表面層を種々変更して包装テストを実施した。
全体のフイルム厚さは30μであつた。[Table] Example 3 In Example 2 (EPC/EBC=90/10), a packaging test was conducted with various changes in the surface layer.
The total film thickness was 30μ.
【表】
なお、上記フイルムを２軸延伸後両面コロナ放
電処理したものの、濡れ張力は表／裏＝34／32ダ
イン／cmであつた。
実施例 ４
実施例１のＢ層を有し、中心層Ａ層のポリプロ
ピレンに混合する低分子熱可塑性樹脂の混合量を
次表の如く変化させたときの自動供給性、密封
性、を評価した。[Table] Although the above film was biaxially stretched and then subjected to corona discharge treatment on both sides, the wetting tension was 34/32 dynes/cm (front/back). Example 4 Having the B layer of Example 1, the automatic supply performance and sealing performance were evaluated when the amount of low molecular weight thermoplastic resin mixed with the polypropylene of the central layer A layer was varied as shown in the following table. .
【表】
なお、上記フイルムを２軸延伸後片面70℃に保
ちコロナ放電処理し濡れ張力を37.5ダイン／cmと
した。
自動供給性は、石油樹脂０（重量）％の場合帯
電防止性の発現がやゝ悪くガイド板に吸着、或い
は自動カツターに巻付くことにより不安定性を増
した。又石油樹脂が高い含有率では長時間運転に
より、自動カツターの発熱がフイルムの切断仕事
により生じる為、熱軟化した添加樹脂が切断刃に
蓄積し、切断不良、又は切断部分の汚れを生じる
為不良となる。密封包装度は、石油樹脂が高い含
有率ではフイルムの熱収縮を生じ易くなりシール
部の冷却が部分的に異なることにより平板状に固
化しない。このため部分的に凹凸状のヒートシー
ル部が出来、凹凸による隙間により密封性が悪く
なる。
実施例 ５
アイソタクテイツクポリプロピレン（MI＝4.5
ｇ／10分）90（重量）％とロジンエステル10（重
量）％との重合体混合物100部にポリエチレング
リコールモノステアレート（PEGの分子量600）
1.0（重量）部、ステアリン酸モノグリセライド
0.5（重量）部混合した基層(A)とこの片面にエチレ
ンプロピレン共重合体（エチレン含有量5.0重量
％）とエチレンブテン−１共重合体（エチレン含
有量５重量％）を90：10（重量比）の割合で混合
し、該混合樹脂100部に対し、エルカ酸アマイド
を0.15（重量）部炭酸カルシウム0.3（重量）部を
混合した表層(B)を共押出し、130℃で縦方向に4.5
倍、158℃で横方向に8.5倍延伸した。
得られたフイルムはＡ／B2層からなる軸延伸
された厚さ20μ（厚み比Ａ／Ｂ＝19／１）のフイ
ルムであり、160℃でヒートセツト後、Ａ層の表
面をコロナ放電処理し、濡れ張力を42ダイン／cm
とした。
該積層フイルムを用いて短柵状味付海苔を自動
包装機により包装し、密封テストを行なつた。比
較例として次のフイルムを得同様に密封テストを
行なつた。
比較例 ６
基層(A)は実施例５と同様とし、Ａ層を縦方向に
延伸後Ｂ層としてエチレンプロピレン共重合体
（エチレン含有量５重量％）を積層して、実施例
５と同様に横延伸、熱固定し、Ａ層にコロナ放電
処理を行なつた。
比較例 ７
基層(A)は実施例５と同様とし、Ａ層を縦方向に
延伸後片面にＢ層としてプロピレン／ブテン−１
（プロピレン含有率70重量％）共重合体を積層
（積層部の厚み3.8μ）した。得られたフイルムも
比較例６と同様の工程を通した。[Table] After the film was biaxially stretched, one side was kept at 70°C and subjected to corona discharge treatment to give a wet tension of 37.5 dynes/cm. As for automatic feeding, when the petroleum resin was 0% (by weight), the antistatic properties were rather poor and instability increased due to adsorption to the guide plate or wrapping around the automatic cutter. In addition, if the petroleum resin content is high, the automatic cutter will generate heat due to the work of cutting the film due to long-term operation, and the heat-softened additive resin will accumulate on the cutting blade, resulting in poor cutting or staining of the cut part, resulting in defects. becomes. Regarding the degree of sealed packaging, if the content of petroleum resin is high, the film tends to shrink due to heat, and the sealed portion is not cooled in parts, so that it does not solidify into a flat plate. As a result, a partially uneven heat-sealed portion is formed, and the sealing performance is deteriorated due to gaps caused by the unevenness. Example 5 Isotactic polypropylene (MI=4.5
g/10 min) to 100 parts of a polymer mixture of 90% (by weight) and 10% (by weight) rosin ester with polyethylene glycol monostearate (PEG molecular weight 600).
1.0 part (by weight), stearic acid monoglyceride
0.5 parts (by weight) of the base layer (A) was mixed with ethylene propylene copolymer (ethylene content 5.0% by weight) and ethylene-butene-1 copolymer (ethylene content 5% by weight) on one side of the base layer (A) in a ratio of 90:10 (by weight). 0.15 parts (by weight) of erucic acid amide and 0.3 parts (by weight) of calcium carbonate were mixed with 100 parts of the mixed resin, and the surface layer (B) was coextruded, and the surface layer (B) was mixed at 130°C with 4.5 parts by weight in the longitudinal direction.
The film was stretched 8.5 times in the transverse direction at 158°C. The obtained film was an axially stretched film with a thickness of 20 μm (thickness ratio A/B = 19/1) consisting of two layers A/B. After heat setting at 160°C, the surface of the A layer was subjected to a corona discharge treatment. Wet tension 42 dynes/cm
And so. Short fence-shaped flavored seaweed was packaged using the laminated film using an automatic packaging machine, and a sealing test was conducted. As a comparative example, the following film was obtained and similarly subjected to a sealing test. Comparative Example 6 The base layer (A) was the same as in Example 5, and after stretching the A layer in the longitudinal direction, an ethylene propylene copolymer (ethylene content 5% by weight) was laminated as the B layer. After transverse stretching and heat setting, layer A was subjected to corona discharge treatment. Comparative Example 7 The base layer (A) was the same as in Example 5, and after stretching the A layer in the longitudinal direction, one side was coated with propylene/butene-1 as the B layer.
(propylene content: 70% by weight) copolymers were laminated (thickness of the laminated portion was 3.8 μm). The obtained film was also subjected to the same steps as in Comparative Example 6.
【表】
40℃／80％RHの状態に１ケ月間放置したとこ
ろ、密封包装度が悪いと海苔が吸湿し、海苔と包
装材の内側とが密着して、濡れの現象を生じ、フ
イルムが黒く斑点状にみえ、且つ味も低下し商品
価値を害する。このテストの結果実施例５が最も
よく比較例６は120〜135℃での包装品は全く不良
であり、より高温でないと密封包装体にならなか
つた。
比較例７は密封包装体を得る範囲を有するが、
適正範囲が狭く、高温ヒートシールしないと使え
ないが、収縮によりシール部の平滑性が乏しく密
封性が悪い一因となつた。又曇価が悪く、海苔の
外見上の色相が悪くなりシール部だけが透明にな
り商品価値を害した包装体になつた。
比較例 ８〜12
基層(A)としてアイソタクチツクポリプロピレン
（固有粘度2.1dl／ｇ）100重量部、ステアリン酸
モノグリセリド0.5重量部、アルキルアミンエチ
レンオキサイド付加物（丸菱油化社製デノン331）
1.0重量部から構成し、表面層(B)として下記に示
す重合体組成物のいずれかの100重量部にアルキ
ルアミンエチレンオキサイド付加物（丸菱油化社
製デノン331）0.8重量部混合した。上記(A)及び(B)
層の組成物を２台の押出機から溶融押出しし、
Ｂ／Ａ／Ｂの三層未延伸フイルム（1300μ）を得
た。該未延伸フイルムを130℃で縦方向に4.0倍、
続いて横方向に150℃で8.0倍延伸し、160℃で５
％緩和熱固定し、冷却して厚さ35μ（片側の表面
層厚み0.8μ）のフイルムを得、評価した。
ａ：エチレン／プロピレン共重合体（エチレン含
有量4.5重量％、メルトインデツクス2.0ｇ／10
分）90重量％とエチレン／ブテン−１共重合体
（エチレン含有量88重量％、メルトインデツク
ス4.0ｇ／10分）10重量％
ｂ：エチレン／プロピレン共重合体（エチレン含
有量4.5重量％、メルトインデツクス2.0ｇ／10
分）50重量％とエチレン／ブテン−１共重合体
（エチレン含有量88重量％、メルトインデツク
ス4.0ｇ／10分）50重量％
ｃ：プロピレン／ブテン−１共重合体（ブテン−
１含有量15重量％、メルトインデツクス3.8
ｇ／10分）50重量％とエチレン／ブテン−１共
重合体（エチレン含有量88重量％、メルトイン
デツクス4.0ｇ／10分）50重量％
ｄ：エチレン／ブテン−１共重合体（エチレン含
有量88重量％、メルトインデツクス4.0ｇ／10
分）50重量％とアイソダクテイツクポリプロピ
レン（固有粘度2.1dl／ｇ）
ｅ：ブテン−１／エチレン共重合体（ブテン−１
含有量95重量％、メルトインデツクス5.08／10
分）50重量％とアイソタクテイツクポリプロピ
レン（固有粘度2.1dl／ｇ）50重量％
比較例 13、14
比較例８において基層(A)としてアイソタクチツ
クポリプロピレン（固有粘度2.1dl／ｇ）100重量
部、ステアリン酸モノグリセリド0.5重量部、ア
ルキルアミンエチレンオキサイド付加物（丸菱油
化社製デノン331）1.0重量部から構成し、表面層
(B)として下記に示す重合体組成物のいずれか100
重量部にアルキルアミンエチレンオキサイド付加
物（丸菱油化社製デノン331）0.8重量部混合した
層を積層した未延伸シートと比較例８と同様に延
伸しようとした。しかしながら縦延伸ロールに粘
着し、巻付きを生じ金属ロール表面に表面層が粘
着剥離し、全く生産出来なかつた。そこで縦延伸
ロール温度を60℃に下げて4.0倍延伸した。次い
で横方向に155℃で8.0倍延伸したが、クリツプに
表面層樹脂が付着し、この為、クリツプ把持力が
悪くなり、又飛散樹脂も生じ、横延伸中の破断は
著しく悪かつた。この中でかろうじて出来上がつ
た少量のフイルムを用いて評価した。
ｆ：エチレン／ブテン−１共重合体（エチレン含
有量88重量％、メルトインデツクス4.0ｇ／10
分）50重量％とエチレン／プロピレン共重合体
（エチレン含有量95重量％）50重量％
ｇ：ブテン−１エチレン共重合体（ブテン含有量
95重量％、メルトインデツクス5.0ｇ／10分）
50重量％とエチレン／プロピレン共重合体（エ
チレン含有量％）50重量％[Table] When left at 40℃/80%RH for one month, the seaweed absorbed moisture if the packaging was poorly sealed, causing the seaweed and the inside of the packaging material to come into close contact, resulting in a wetting phenomenon, resulting in the film being damaged. It looks black and speckled, and the taste also deteriorates, which harms the product value. As a result of this test, Example 5 was the best; in Comparative Example 6, the packaged product at 120 to 135°C was completely defective, and could not be sealed unless the temperature was higher. Comparative Example 7 has a range of obtaining a sealed package, but
The appropriate range is narrow and it cannot be used without high-temperature heat sealing, but shrinkage causes poor sealing performance due to poor smoothness of the sealed part. In addition, the haze value was poor, the appearance of the seaweed was poor in color, and only the sealed portion was transparent, resulting in a package that was detrimental to its commercial value. Comparative Examples 8 to 12 Base layer (A): 100 parts by weight of isotactic polypropylene (intrinsic viscosity 2.1 dl/g), 0.5 parts by weight of stearic acid monoglyceride, alkylamine ethylene oxide adduct (Denon 331 manufactured by Marubishi Yuka Co., Ltd.)
As the surface layer (B), 0.8 parts by weight of an alkylamine ethylene oxide adduct (Denon 331 manufactured by Marubishi Yuka Co., Ltd.) was mixed with 100 parts by weight of any of the following polymer compositions. (A) and (B) above
melt extruding the layer composition from two extruders;
A three-layer unstretched film (1300μ) of B/A/B was obtained. The unstretched film was stretched 4.0 times in the longitudinal direction at 130°C.
Next, it was stretched 8.0 times in the transverse direction at 150℃, and then stretched 5 times at 160℃.
% relaxation heat setting and cooling to obtain a film with a thickness of 35 μm (surface layer thickness on one side: 0.8 μm), which was evaluated. a: Ethylene/propylene copolymer (ethylene content 4.5% by weight, melt index 2.0g/10
b: Ethylene/propylene copolymer (ethylene content 4.5% by weight, Melt index 2.0g/10
min) 50% by weight and ethylene/butene-1 copolymer (ethylene content 88% by weight, melt index 4.0 g/10 min) 50% by weight c: propylene/butene-1 copolymer (butene-1)
1 content 15% by weight, melt index 3.8
g/10 min) 50 wt% and ethylene/butene-1 copolymer (ethylene content 88 wt%, melt index 4.0 g/10 min) 50 wt% d: ethylene/butene-1 copolymer (ethylene containing Amount 88% by weight, melt index 4.0g/10
min) 50% by weight and isodactylic polypropylene (intrinsic viscosity 2.1 dl/g) e: butene-1/ethylene copolymer (butene-1
Content 95% by weight, melt index 5.08/10
Comparative Examples 13, 14 100 parts by weight of isotactic polypropylene (intrinsic viscosity 2.1 dl/g) as the base layer (A) in Comparative Example 8 , 0.5 parts by weight of stearic acid monoglyceride, and 1.0 parts by weight of alkylamine ethylene oxide adduct (Denon 331 manufactured by Marubishi Yuka Co., Ltd.), and the surface layer
Any 100 of the polymer compositions shown below as (B)
An attempt was made to stretch an unstretched sheet in the same manner as in Comparative Example 8, in which a layer containing 0.8 parts by weight of an alkylamine ethylene oxide adduct (Denon 331 manufactured by Marubishi Yuka Co., Ltd.) was laminated. However, it adhered to the longitudinal stretching rolls, causing winding and peeling of the surface layer on the surface of the metal roll, making it impossible to produce at all. Therefore, the longitudinal stretching roll temperature was lowered to 60°C and the film was stretched 4.0 times. Next, the film was stretched 8.0 times in the transverse direction at 155°C, but the surface layer resin adhered to the clip, resulting in poor clip gripping force, resin scattering, and breakage during transverse stretching was extremely poor. A small amount of barely finished film was used for evaluation. f: Ethylene/butene-1 copolymer (ethylene content 88% by weight, melt index 4.0g/10
min) 50% by weight and ethylene/propylene copolymer (ethylene content 95% by weight) 50% by weight g: butene-1 ethylene copolymer (butene content
95% by weight, melt index 5.0g/10 minutes)
50% by weight and ethylene/propylene copolymer (ethylene content%) 50% by weight
【表】【table】
【表】
比較例８は、透明性は良いが、低温ヒートシー
ル性が悪く、高温滑り性が悪い。従つてシール強
度の向上する150℃以上のヒートシール温度で包
装すると皺が多くなり外観上も悪く、密封包装体
が得られないため不良率が高い。
比較例９、10は強いヒートシール強度を有する
が、透明性が悪いとともに、高温滑り性が極めて
悪く皺が多発する。従つて包装不良率も高く実用
に供し得ない。
比較例11、12は、ポリプロピレンとエチレン／
ブテン−１又はブテン／エチレン−１との相溶性
が不良で透明性が悪く、ヒートシール強度も低
い。また高温滑り性が悪く密封包装体が得られ
ず、実用に供し得ない。
比較例13、14は、透明性が著しく悪い、縦延伸
ロールへの粘着及びスクラツチによる表面損傷と
低温延伸しか出来ない事による内部に生じた空洞
が主原因である。その上高温滑り性が高く測定不
能でありステイツクスリツプにより、ヒートシー
ル部に皺が多発し、常温摩擦係数も高く、ステイ
ツクスリツプしやすく、自動供給性も悪い。たと
え低温ヒートシール性が優れていても自動包装機
に供し得ないだけでなく、静的な条件でヒートシ
ール出来ても、自動包装機でヒートシール不十分
な場合と、結果的に同じである。密封包装度が悪
い包装材料しか得られない。[Table] Comparative Example 8 had good transparency, but poor low-temperature heat-sealing properties and poor high-temperature slip properties. Therefore, if the package is packaged at a heat-sealing temperature of 150° C. or higher, which improves the sealing strength, wrinkles will increase, the appearance will be poor, and a sealed package will not be obtained, resulting in a high defect rate. Comparative Examples 9 and 10 have strong heat-sealing strength, but have poor transparency and extremely poor high-temperature slip properties, resulting in frequent wrinkles. Therefore, the packaging defect rate is also high and it cannot be put to practical use. Comparative Examples 11 and 12 are polypropylene and ethylene/
It has poor compatibility with butene-1 or butene/ethylene-1, resulting in poor transparency and low heat seal strength. In addition, the high-temperature slip property is poor, and a sealed package cannot be obtained, making it impossible to put it into practical use. Comparative Examples 13 and 14 had extremely poor transparency, mainly due to surface damage due to adhesion to longitudinal stretching rolls and scratches, and cavities formed inside due to only low temperature stretching. In addition, it has high slipperiness at high temperatures and cannot be measured, and the heat-sealed part is often wrinkled due to staple slip.The coefficient of friction at room temperature is also high, which makes staple slipping easy, and automatic feeding is poor. Even if the product has excellent low-temperature heat-sealing properties, it cannot be used in automatic packaging machines, and even if it can be heat-sealed under static conditions, the result is the same as if the automatic packaging machine is insufficiently heat-sealed. . Only packaging materials with poor sealing properties can be obtained.
第１図、第４図はヒートシール強度と重合体の
混合比との関係、第２図はシリコンオイル添加量
とヒートシール強度、曇価、高温摩擦係数との関
係、第３図は密封包装度とシリコン系オイル添加
率との関係を示す。
Figures 1 and 4 are the relationship between heat seal strength and polymer mixing ratio, Figure 2 is the relationship between silicone oil addition amount, heat seal strength, haze value, and high temperature friction coefficient, and Figure 3 is sealed packaging. This figure shows the relationship between degree and silicone oil addition rate.
Claims (1)
層の少なくとも片面の表面がエチレン−プロピレ
ン共重合体（エチレン含有量0.5〜10重量％）86
〜95（重量）％とブテン−エチレン共重合体（ブ
テン含有量70〜99重量％）14〜５（重量）％とを
有する重合体混合物により形成された表面層であ
り、かつ該表面層の合計厚みが全体の0.2〜50％
であつて個々の表面層の厚みが0.2〜10μである少
なくとも２層の積層フイルムを熱接着することに
より物品を包装したものであることを特徴とする
密封性の良好な包装体。 ２ 表面層がエチレン−プロピレン共重合体（エ
チレン含有量0.5〜10重量％）86〜95（重量）％と
ブテン−エチレン共重合体（ブテン含有量70〜99
重量％）14〜５（重量）％を有する重合体混合物
100（重量）部とシリコン系オイル0.01〜0.15（重
量）部とから形成されたものであることを特徴と
する特許請求の範囲第１項記載の密封性良好な包
装体。 ３ 基層がポリプロピレン系重合体80〜98（重量）
％と低分子量熱可塑性樹脂20〜２（重量）％とを
有する混合体により形成されたものであることを
特徴とする特許請求の範囲第１項または第２項記
載の密封性良好な包装体。[Claims] 1. At least one surface of the base layer formed of a polypropylene polymer is an ethylene-propylene copolymer (ethylene content: 0.5 to 10% by weight)86
95% (by weight) and 14-5% (by weight) of butene-ethylene copolymer (butene content 70-99% by weight), and Total thickness is 0.2-50% of the whole
1. A package with good sealing properties, characterized in that the article is packaged by thermally adhering at least two layers of laminated films each having a thickness of 0.2 to 10 μm on each surface layer. 2 The surface layer is made of 86-95% (by weight) ethylene-propylene copolymer (ethylene content 0.5-10% by weight) and butene-ethylene copolymer (butene content 70-99%).
Polymer mixture with 14-5% (wt.%)
The package with good sealing properties according to claim 1, characterized in that it is formed from 100 parts (by weight) and 0.01 to 0.15 parts (by weight) of silicone oil. 3 Base layer is polypropylene polymer 80-98 (weight)
% and a low molecular weight thermoplastic resin of 20 to 2% (by weight). .
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16513778A JPS5591665A (en) | 1978-12-29 | 1978-12-29 | Package of high sealinggup property |
| US06/010,641 US4230767A (en) | 1978-02-08 | 1979-02-08 | Heat sealable laminated propylene polymer packaging material |
| CA000321224A CA1178414A (en) | 1978-02-08 | 1979-02-08 | Packaging material having excellent seal packaging property |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16513778A JPS5591665A (en) | 1978-12-29 | 1978-12-29 | Package of high sealinggup property |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5591665A JPS5591665A (en) | 1980-07-11 |
| JPS6328793B2 true JPS6328793B2 (en) | 1988-06-09 |
Family
ID=15806591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16513778A Granted JPS5591665A (en) | 1978-02-08 | 1978-12-29 | Package of high sealinggup property |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5591665A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190050267A (en) * | 2017-10-31 | 2019-05-10 | 삼성디스플레이 주식회사 | Light absorber and organic electroluminescence device including the same |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NZ213356A (en) * | 1984-11-14 | 1989-01-06 | Mobil Oil Corp | Oriented multi-layer film containing polyprolylene |
| GB8613161D0 (en) * | 1986-05-30 | 1986-07-02 | Exxon Chemical Patents Inc | Sealable films |
| DE3631231A1 (en) * | 1986-09-13 | 1988-03-24 | Hoechst Ag | PRINTABLE AND DOUBLE-SIDED SEALABLE, BIAXIALLY ORIENTED OPAQUE POLYOLEFIN MULTILAYER FILM, THEIR PRODUCTION AND THEIR USE |
| JP2570359B2 (en) * | 1987-03-09 | 1997-01-08 | 住友化学工業株式会社 | Multi-layer shrink film |
| US5536773A (en) * | 1993-07-16 | 1996-07-16 | Mitsui Petrochemical Industries, Ltd. | Polypropylene resin composition and the use of the same |
-
1978
- 1978-12-29 JP JP16513778A patent/JPS5591665A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190050267A (en) * | 2017-10-31 | 2019-05-10 | 삼성디스플레이 주식회사 | Light absorber and organic electroluminescence device including the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5591665A (en) | 1980-07-11 |
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