Depth air filter having fibers intertwined by liquid-jetting
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United States of America Patent
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May 14, 2002
Grant Date -
N/A
app pub date -
Sep 21, 1999
filing date -
Sep 21, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An air filter having a depth filter material which includes a nonwoven fabric having a upstream side and a downstream side. The nonwoven fabric is formed of adhesively and/or cohesively bonded fibers, the fibers having intertwinements which are produced by liquid-jetting from the downstream side prior to the adhesive and/or cohesive bonding, and the fibers, because of the liquid-jetting, being compacted increasingly from the upstream side toward the downstream side in such a way that differently compacted regions are formed, in which particles of different size can be separated.
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