发明名称 |
Method for making biaxially stretched articles of thermoplastic resin |
摘要 |
A method is disclosed for biaxially stretching a band of thermoplastic resin which comprises attenuating a band of unstretched resin, in a forming zone while the resin is in the thermoelastic condition, by passing the band between two surfaces spaced at a distance less than the thickness of said band of unstretched resin while permitting said band to expand in width, and then cooling said band to a temperature below the softening point of the resin while maintaining the dimensions of the attenuated and expanded band; apparatus for performing such a method is also disclosed.
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申请公布号 |
US4235834(A) |
申请公布日期 |
1980.11.25 |
申请号 |
US19780877283 |
申请日期 |
1978.02.13 |
申请人 |
ROHM GMBH |
发明人 |
FRIEDERICH, ERNST;SCHANZ, KARL-HEINZ;SCHIKOWSKY, HARTMUT;VETTER, HEINZ |
分类号 |
B29C49/00;B29C33/60;B29C35/00;B29C47/94;B29C55/00;B29C55/12;B29C55/18;B29C55/30;C08J5/18;(IPC1-7):B29C17/02;B29D7/24 |
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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