发明名称 |
Polypropylene films |
摘要 |
<p>This invention concerns biaxially oriented polypropylene films containing from 1 to 40 percent by weight of a hydrocarbon resin, the resin being substantially miscible with the polypropylene, and the film having a crease retention of at least 50% as measured by ASTM D920-49. The hydrocarbon resin is preferably a terpene resin, a hydrogenated synthetic resin or a compatible rosin. Crease retention values in excess of 70% have been achieved in particular by orienting the films at a temperature of at least 10 Centigrade degrees below the crystalline melting point of the polypropylene.</p> |
申请公布号 |
EP0317276(B2) |
申请公布日期 |
1998.06.24 |
申请号 |
EP19880310791 |
申请日期 |
1988.11.15 |
申请人 |
COURTAULDS FILMS & PACKAGING (HOLDINGS) LTD. |
发明人 |
SYME, BLAIR GRIEVE WILSON;CRIGHTON, ALLAN JOHN |
分类号 |
B29C55/12;B29K23/00;B29L7/00;B32B27/32;C08J5/18;C08L23/10;C08L29/10;C08L35/08;C08L57/02;C08L101/00;(IPC1-7):C08J5/18;C08L45/00;C08L23/12 |
主分类号 |
B29C55/12 |
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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