| 发明名称 |
Process to produce thin film |
| 摘要 |
A process is described to produce ultra thin biaxially stretched film made of thermoplastic where at least two film webs are superimposed and stretched together in both the longitudinal and transverse directions. The film webs are subjected to a heat treatment before the first draw step. After stretching, the film webs are separated again from each other.
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| 申请公布号 |
US5288437(A) |
申请公布日期 |
1994.02.22 |
| 申请号 |
US19920878258 |
申请日期 |
1992.05.04 |
| 申请人 |
HOECHST AKTIENGESELLSCHAFT |
发明人 |
CRASS, GUENTHER;JANOCHA, SIEGFRIED;BAMMERT, GISBERT |
| 分类号 |
B29C47/06;B29C35/02;B29C55/12;B29D7/01;B29L9/00;B32B27/00;(IPC1-7):B29C55/12 |
主分类号 |
B29C47/06 |
| 代理机构 |
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代理人 |
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| 主权项 |
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