Fibrous webs having enhanced electret properties

Details Fibrous webs having enhanced electret properties Fibrous webs having enhanced electret properties

1995-08-14

1999-06-01

Mulcahy, Peter D.

Plastic and nonmetallic article shaping or treating: processes

Treating shaped or solid article

To remove entrained material from article

264340, 428198, 428224, 428296, B29B 1700

Patent

active

059085983

ABSTRACT:
The present invention relates to a method of making a fibrous electret material which includes the steps of (1) forming a fibrous web of nonconductive thermoplastic fibers from a blend of nonconductive thermoplastic resin and an additive which is (a) a thermally stable organic compound or oligomer containing at least one perfluorinated moiety or (b) a thermally stable organic triazine compound or oligomer containing at least one nitrogen atom in addition to those in the triazine group or (c) a combination thereof; (2) impinging jets of water or a stream of water droplets onto the web at a pressure sufficient to provide the web with filtration enhancing electret charge; and (3) drying the web.

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