Method of making fibrous electrets
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 8, 1983
Grant Date -
N/A
app pub date -
Mar 12, 1981
filing date -
Mar 12, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A process of manufacturing an electrostatically charged filtration medium is disclosed. A web made of nonconductive thermoplastic fibers is contacted on each side with a more conductive web to form a combined web. The combined web is charged with electrically charged particles from corona charging elements on opposite sides of the web. The charging elements are operated at a voltage of from 5 to 25 kV but with opposite polarity.
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Family
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Cited Art Landscape
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