发明名称 |
STRETCHED POLYTETRAFLUOROETHYLENE MOLDINGS AND PROCESS FOR PRODUCTION THEREOF |
摘要 |
<p>Disclosed are expanded polytetrafluoroethylene products, such as porous polytetrafluoroethylene tubes, having high axial tear strength and a process for their production. Each expanded polytetrafluoroethylene product has a microstructure, which comprises fibrils and nodes interconnected with each other by the fibrils, and has an axial tear strength of not lower than 6,000 gf/mm as calculated in accordance with the following formula: L/ÄTx(V/100)Ü where L (gf) is an axial tear load, T (mm) is a wall thickness, and V (%) is a volume ratio of resin. The process for the production of the expanded polytetrafluoroethylene product includes a high-speed extrusion step.</p> |
申请公布号 |
EP1508587(A1) |
申请公布日期 |
2005.02.23 |
申请号 |
EP20030721019 |
申请日期 |
2003.05.01 |
申请人 |
SUMITOMO ELECTRIC INDUSTRIES, LTD. |
发明人 |
HAYASHI, FUMIHIRO;OKUDA, YASUHIRO;NAKATA, MOTOMI;NATORI, KOICHIRO |
分类号 |
B29C47/00;B29C47/54;B29C55/00;B29C55/22;C08J9/00;C08L27/18;(IPC1-7):C08J9/00;A61L27/00 |
主分类号 |
B29C47/00 |
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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