发明名称 |
MEHRSCHICHTIGER POLYPROPYLENFILM. |
摘要 |
<p>A polypropylene multi-layer film which comprises a substrate layer formed of crystalline polypropylene and a composition laminated on at least one side of said substrate layer, said composition comprising 70 to 95% by weight of (A) a crystalline propylene-ethylene copolymer having an ethylene content of 1.5 to 6.0% by weight and/or a crystalline propylene- alpha -olefin copolymer having a propylene content of 80 to 98% by weight, a butene-1 content of 2 to 20% by weight, and an ethylene content of 0 to 5% by weight, and 5 to 30% by weight of (B) a crystalline propylene-butene-1 copolymer which is a copolymer obtained by decomposing a crystalline propylene-butene-1 copolymer having a butene-1 content of 25 to 45% by weight, an intrinsic viscosity of 2.5 dl/g or more as determined in tetralin at 135 DEG C., and a proportion of 35% by weight or more of a polymer component soluble in xylene at 20 DEG C., and containing 1.5% by weight or less of a polymer component having a molecular weight calculated in terms of polystyrene of 10,000 or less as determined by GPC.</p> |
申请公布号 |
DE3681073(D1) |
申请公布日期 |
1991.10.02 |
申请号 |
DE19863681073 |
申请日期 |
1986.04.28 |
申请人 |
SUMITOMO CHEMICAL CO., LTD., OSAKA, JP |
发明人 |
KAKUGO, MASAHIRO, NARASHINO-SHI, JP;IMA, SEIICHIRO;MIYATAKE, TATSUYA;HARADA, HIROYUKI, ICHIHARA-SHI, JP |
分类号 |
C08L23/00;B32B27/32;C08L7/00;C08L21/00;C08L23/14;C08L23/16;C08L101/00;(IPC1-7):B32B27/32 |
主分类号 |
C08L23/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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