Filter having corrugated nonwoven webs of polymeric microfiber
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United States of America Patent
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Jun 9, 1998
Issued Date -
N/A
app pub date -
Dec 17, 1996
filing date -
Aug 4, 1992
priority date (Note) -
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Abstract
A filter that is capable of removing particulate and gaseous contaminants from a fluid, which filter comprises: a first filter element that is capable of removing particulate contaminants from a fluid, the first filter element comprising a corrugated nonwoven web of polymeric microfiber having a solidity of 0.1 or less and a means for retaining the corrugated shape of the corrugated nonwoven web of polymeric microfiber, the shape-retaining means being secured to the corrugated nonwoven web to maintain the corrugated shape of the corrugated nonwoven web of polymeric microfiber, and a second filter element comprising a sorbent material capable of removing gaseous contaminants from a fluid; the first and second filter elements being secured to each other and having a shape adapted for attachment to a respirator.
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