Porous structure of polytetrafluoroethylene and process for production thereof
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United States of America Patent
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Dec 15, 1987
Issued Date -
N/A
app pub date -
Jan 24, 1986
filing date -
Nov 30, 1978
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A porous polytetrafluoroethylene material is disclosed having a molecular microfibrous structure having, at one surface, a strong orientation in a given direction and, at another opposite surface, a strong orientation and a direction at right angles to the first, in which the orientation of the microfibrous structure progressively changes from one surface to the other. A process for preparing such an element is also disclosed.
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