Method of charging electret filter media
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United States of America Patent
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Mar 5, 1996
Issued Date -
N/A
app pub date -
Aug 17, 1994
filing date -
Aug 17, 1993
priority date (Note) -
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Abstract
A method of charging a nonwoven web of thermoplastic microfibers to provide electret filter media is provided. The method includes impinging on a nonwoven web of thermoplastic nonconductive microfibers capable of having a high quantity of trapped charge jets of water or a stream of water droplets at a pressure sufficient to provide the web with filtration enhancing electret charge and drying said web.
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