发明名称 |
Multilayer heat-shrinkable sealable films |
摘要 |
Multilayer heat-shrinkable films in which the skin layers A consist of a polyolefin selected from: A1) a composition containing 25-45% b.w. of a random copolymer of propylene with ethylene and 55-75% b.w. of a random terpolymer of propylene, ethylene and one or more C4-C10 alpha-olefins; and A2) random copolymer(s) of propylene and one or more C4-C10 alpha-olefins. Core layer B comprises a heterophasic composition comprising: a) 20-60% b.w. of a propylene homopolymer with an isotacticity index higher than 80 or of a propylene crystalline copolymer with ethylene and/or C4-C10 alpha-olefins containing at least 85% b.w. of propylene units and having an isotacticity index of at least 80 or of mixtures thereof and b) 40-80% b.w. of an ethylene copolymer with propylene and/or 1-butene and possibly a diene, containing 20-60% b.w. of ethylene units and completely soluble in xylene at 25° C.
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申请公布号 |
US6727000(B2) |
申请公布日期 |
2004.04.27 |
申请号 |
US20010979470 |
申请日期 |
2001.11.20 |
申请人 |
BASELL POLIOLEFINE ITALIA S.P.A. |
发明人 |
JOLY ANNE-MARIE;BECCARINI ENRICO |
分类号 |
B65D65/40;B32B27/32;B65D75/00;(IPC1-7):B32B27/08 |
主分类号 |
B65D65/40 |
代理机构 |
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