发明名称 |
Stretching of polyethylene terephthalate films |
摘要 |
Biaxially oriented thermoplastic films, for example polyethylene terephthalate films, are further stretched in one direction in a stretching zone having a distance in the direction of stretching which is greater than the breadth of said film. As a result, stretched films having a uniform thickness in the breadthwise direction are obtained in a high yield rate.
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申请公布号 |
US4237088(A) |
申请公布日期 |
1980.12.02 |
申请号 |
US19780950696 |
申请日期 |
1978.10.12 |
申请人 |
TOYOBO CO., LTD. |
发明人 |
YOSHIMURA, SHOHEI;ISAKA, TUTOMU |
分类号 |
B29C49/00;B29C55/00;B29C55/04;B29C55/14;B29C71/02;(IPC1-7):B29C17/02 |
主分类号 |
B29C49/00 |
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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