Multilayer article of microporous and porous materials
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United States of America Patent
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Oct 31, 1989
Grant Date -
N/A
app pub date -
Dec 19, 1988
filing date -
Dec 19, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A multilayer article comprises at least one layer of substantially porous material bonded to at least one layer of microporous material comprising a matrix consisting essentially of linear ultrahigh molecular weight polyolefin, a large proportion of finely divided, water-insoluble siliceous filler, and interconnecting pores. The microporous material has regions of stretch-induced molecularly oriented polymer in the matrix.
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