发明名称 |
Method of producing polyproplene films |
摘要 |
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.
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申请公布号 |
US5246659(A) |
申请公布日期 |
1993.09.21 |
申请号 |
US19910793573 |
申请日期 |
1991.11.18 |
申请人 |
COURTAULDS FILMS & PACKAGING (HOLDINGS) LTD. |
发明人 |
CRIGHTON, ALLAN J.;SYME, BLAIR G. W. |
分类号 |
C08J5/18;C08L23/10;C08L23/12;C08L23/14;C08L57/02 |
主分类号 |
C08J5/18 |
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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