Method of charging electret filter media

Details Method of charging electret filter media Method of charging electret filter media

1994-08-17

1996-03-05

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Direct application of electrical or wave energy to work

Producing or treating porous product

55528, 55DIG39, 264 12, 264234, 264483, B29C 3510

Patent

active

054965071

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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