Composite air-filtering material
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United States of America Patent
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Mar 30, 1993
Grant Date -
N/A
app pub date -
Jul 18, 1991
filing date -
May 22, 1990
priority date (Note) -
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status (Latency Note)
Importance
Abstract
An air-filtering material exchangeably attached to a home-use or automobile air filter comprises a water jet type nonwoven fabric at an air outlet side and another type nonwoven fabric or fiber assembly at an air inlet side. These nonwoven fabric sheets are laminated on one another by needle punching. The water jet type nonwoven fabric is made from crowded finer fiber staples, and bits formed therein by penetration of needles of a needle punching machine may be stopped up by centripetally moving fiber staples surrounding the bits.
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