Textured, porous, expanded PTFE
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United States of America Patent
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Nov 14, 1995
Grant Date -
N/A
app pub date -
Jan 15, 1993
filing date -
Jan 15, 1993
priority date (Note) -
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Abstract
A more porous PTFE is obtained by impressing a pattern into extruded PTFE and then expanding the PTFE. The pattern can be impressed by knurling or, preferably, by rolling the sheet between rollers having a pseudo-random pattern formed on the surface of the roller. The uniformity of the pores is controlled by the pattern; viz. a coarse pattern produces a wider distribution of internodal distances than a finer pattern.
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