发明名称 |
METHOD FOR MANUFACTURING POROUS FLUOROPOLYMER FILMS |
摘要 |
A method for preparing thin fluoropolymer (PTFE) films, said method generally comprising the steps of: a) providing an unsintered fluoropolymer film; b) pre-sintering expansion of the film; c) sintering the expanded film with dimensional restraint to prevent shrinkage; and d) post-sintering stretching of the film to a final thickness preferably less than 0.002 inches. The post-sintering stretching of the film in step d may be accomplished in a single step, or may comprise a series of post-sintering stretching steps. Steps b and c of the method may be carried out by passing the calendared film through a machine direction orienter device and, thereafter, step d of the method may be accomplished by subsequently repassing the sintered film through the machine direction orienter device, one or more additional times.
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申请公布号 |
WO9634911(A1) |
申请公布日期 |
1996.11.07 |
申请号 |
WO1996US06083 |
申请日期 |
1996.05.01 |
申请人 |
BAXTER INTERNATIONAL INC. |
发明人 |
SHANNON, DONALD;KUO, CHRIS;PETERSON, ROBERT;MCCOLLAM, CHRIS |
分类号 |
C08J5/18;B29C43/00;B29C43/24;B29C55/00;B29C55/02;B29C67/04;B29K27/12;B29K105/04;B29L7/00;C08J9/00;(IPC1-7):C08J5/18 |
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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