Nonwoven filter media for gas
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United States of America Patent
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Jan 28, 1997
Grant Date -
N/A
app pub date -
Aug 30, 1994
filing date -
Aug 30, 1994
priority date (Note) -
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Abstract
The present invention provides a filter medium, which contains an electretized nonwoven web of crimped fibers selected from the group consisting of spunbond filaments and staple fibers, wherein the nonwoven web has a Frazier permeability equal to or greater than about 100 ft.sup.3 /min/ft.sup.2 and a density between about 0.01 g/cm.sup.3 and about 0.095 g/cm.sup.3.
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