Non-wovens of electret fiber mixtures having an improved charge

Details Non-wovens of electret fiber mixtures having an improved charge Non-wovens of electret fiber mixtures having an improved charge

1995-08-28

1998-03-10

Bell, James J.

Fabric (woven, knitted, or nonwoven textile or cloth, etc.)

Nonwoven fabric

Including strand or fiber material which is stated to have...

152091, 55DIG39, 307400, 442402, 442416, 442364, A47K 702

Patent

active

057261075

ABSTRACT:
A non-wovens fabric of electret fibers having an improved charge stability and comprising materials which chiefly comprise a fiber-forming addition or condensation polymer and 0.01 to 30% by weight (preferably 0.01 to 10, in particular 0.1 to 5, % by weight), based on the weight of the material, of organic or organometallic charge control agents, wherein the non-woven fabric comprises at least two types of electret fiber which are made of different materials which differ from one another in that they comprise different fiber-forming addition or condensation polymers and if appropriate also different charge control agents is described.

REFERENCES:
patent: 4789504 (1988-12-01), Ohmori et al.
patent: 5057710 (1991-10-01), Nishiura et al.
Bierman, Evaluation of permanently charged electrofibrous filters, 17, DOE Nuclear Air Cleaning Conference, Denver, USA (1982).
Journal of Electrostatics, 24 (1990) S. 283-293.
JP-A-05 068 823 (Toray Ind Inc), 23 Marz 1993.

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