Single or multi-ply filter medium for air filtration and a filter element made therefrom
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United States of America Patent
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-
Nov 13, 2001
Grant Date -
N/A
app pub date -
Apr 27, 2000
filing date -
May 6, 1999
priority date (Note) -
In Force
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Abstract
A dual- or multi-layer filter medium for air filtration, having at least one meltblown layer (2, 2a and 5) at least one meltblown layer (2 and 2a) is placed on the inlet side of the filter medium. The meltblown layer has a pore size larger than that of the next following layer or layers.
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