发明授权
- 专利标题： Method for manufacturing expanded polytetrafluoroethylene products
- 专利标题（中）： 膨胀聚四氟乙烯制品的制造方法
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申请号： US545799申请日： 1996-04-15
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公开(公告)号： US5874032A公开(公告)日： 1999-02-23
- 发明人: Richard J. Zdrahala , Nick Popadiuk , David J. Lentz , Edward J. Dormier
- 申请人： Richard J. Zdrahala , Nick Popadiuk , David J. Lentz , Edward J. Dormier
- 申请人地址： NJ Oakland
- 专利权人： Meadox Medicals, Inc.
- 当前专利权人： Meadox Medicals, Inc.
- 当前专利权人地址： NJ Oakland
- 主分类号： A61L29/04
- IPC分类号： A61L29/04 ; B29C47/00 ; B29C47/24 ; B29C47/86 ; B29K27/18 ; B29K105/04 ; B29L23/00
摘要：
An improved method is provided for extruding ePTFE tube (12) for use in medical applications. A tube (12) of PTFE is extruded, preferably in an extrusion process, using counter-rotated die components (22, 26). The die component (16) is maintained at a constant temperature during processing. The resulting green tube (12) has enhanced fibrous state formation in a direction perpendicular to the direction of extrusion. The PTFE green tube (12) is then subjected to secondary operations such as stretching and expansion to yield medical product. The ePTFE tube (12) structure is defined by nodes interconnected by elongate fibrils. Both the nodes and fibrils are substantially randomly tilted with respect to the longitudinal axis of the tube (12). This particular structure yields a tube (12) which exhibits a high degree of radial tear strength useful in medical applications.
公开/授权文献
- US3952027A Alicyclic compounds and process for preparing the same 公开/授权日：1976-04-20
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