Hydroentangled composite filter element
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United States of America Patent
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-
Jul 2, 1991
Grant Date -
N/A
app pub date -
Mar 20, 1989
filing date -
Mar 20, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A high performance filter element is provided, which filter element comprises a wound sheet of apertured material formed by hydroentangling webs of disparate fibrous materials. In a most preferred embodiment, the fibrous material disposed upstream of fluid flow should have a fiber diameter smaller than that disposed downstream.
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