发明名称 |
Biaxially oriented polypropylene film |
摘要 |
<p>The film contains 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 film in the transverse direction at a temperature of at least 10 Centigrade degrees below the crystalline melting point of the polypropylene.</p> |
申请公布号 |
GB2212438(A) |
申请公布日期 |
1989.07.26 |
申请号 |
GB19880026594 |
申请日期 |
1988.11.14 |
申请人 |
* COURTAULDS FILMS & PACKAGING |
发明人 |
BLAIR GRIEVE WILSON * SYME;ALLAN JOHN * CRIGHTON |
分类号 |
B29C55/12;B29K23/00;B29L7/00;B32B27/32;C08J5/18;C08L23/10;C08L29/10;C08L35/08;C08L57/02;C08L101/00 |
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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