发明名称 |
A LAMINATED POLYPROPYLENE FILM |
摘要 |
<p>A laminated polypropylene film consisting of a crystalline polypropylene layer having laminated to at least one side thereof a copolymer layer, said copolymer being a random copolymer of propylene and an alpha -olefin having 4 or more carbon atoms or a random copolymer of propylene, an alpha -olefin having 4 or more carbon atoms and ethylene obtained by vapor phase polymerization in the substantial absence of a liquid medium and satisfying the following conditions (1) to (4): (1) the content of an alpha -olefin having 4 or more carbon atoms in the copolymer is 8 to 25 mole %, (2) the content of ethylene in the copolymer is 3 mole % or less, (3) the content of a cold xylene-soluble portion in the copolymer is 15 to 60% by weight, and (4) the content of a boiling n-heptane-insoluble portion in the copolymer is 7% by weight or more. Said laminated film has an excellent low-temperature heat-sealability, an excellent transparency, a low blocking and a good scratch resistance.</p> |
申请公布号 |
DE3478587(D1) |
申请公布日期 |
1989.07.13 |
申请号 |
DE19843478587 |
申请日期 |
1984.12.27 |
申请人 |
SUMITOMO CHEMICAL COMPANY, LIMITED |
发明人 |
KITAMURA, SHUJI;NAKAE, KIYOHIKO;OGAWA, TADATOSHI;YOSHIDA, TERUAKI;SADATOSHI, HAJIME |
分类号 |
C08F4/00;B32B27/32;C08F4/60;C08F4/64;C08F210/00;C08F210/16;(IPC1-7):B32B27/32;C09J3/14;C08L23/14 |
主分类号 |
C08F4/00 |
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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