COMPOSITE FILTER AND GAS FILTER ASSEMBLY INCLUDING THE SAME
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United States of America Patent
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Issued Date -
Jul 29, 2010
app pub date -
Jan 23, 2009
filing date -
Jan 23, 2009
priority date (Note) -
Abandoned
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Abstract
A composite filter includes a mesh screen layer having 30 to 200 mesh, a first non-woven fabric layer disposed on the mesh screen layer, and a second non-woven fabric layer disposed between the mesh screen layer and the first non-woven fabric layer. The first non-woven fabric layer has a higher filtration efficiency than that of the second non-woven fabric layer for particles having a particle size of 0.3 μm. A gas filter assembly includes the aforesaid composite filter pleated in a zigzag fashion, and a frame for holding and surrounding the composite filter.
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