Porous polytetrafluoroethylene molded article
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Jun 27, 2000
Grant Date -
N/A
app pub date -
Jun 24, 1998
filing date -
Nov 27, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
To provide a porous polytetrafluoroethylene sheet which has excellent cold flow resistance and is used suitably for gaskets and a highly densified polytetrafluoroethylene sheet which has high tensile strength and flex life and is used suitably for diaphragms. The porous polytetrafluoroethylene sheet is produced from a polytetrafluoroethylene material having a microstructure of nodes interconnected by fibrils and has MTS of from 3,000 to 12,000 psi and C.I. of 0.02 to 0.20 g/cc/psi. The highly densified polytetrafluoroethylene sheet is produced by compression-molding the porous polytetrafluoroethylene sheet and then sintering completely. The porous polytetrafluoroethylene sheet is also laminated with a sheet of other material to provide a composite polytetrafluoroethylene molded article.
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Cited Art Landscape
Patent Citation Ranking
- 16 Citation Count
- B32B Class
- 45.82 % this patent is cited more than
- 25 Age