High-performance electret and air filter

Details High-performance electret and air filter High-performance electret and air filter

1985-04-23

1986-12-02

Prunner, Kathleen J.

Gas separation

Means within gas stream for conducting concentrate to collector

55DIG39, 307400, B03C 345, B03C 364, B03C 328

Patent

active

046262636

ABSTRACT:
Disclosed is a high-performance electret comprising 60 to 99% by weight of a non-polar polymer, 0.5 to 39.5% by weight of a polar polymer and 0.5 to 20% by weight of at least one component selected from the group consisting of (A) a non-polar polymer modified with an unsaturated carboxylic acid or a derivative thereof, (B) a non-polar polymer modified with an unsaturated epoxy monomer and (C) a non-polar polymer modified with a silane monomer having an olefinically unsaturated bond.
In this electret, a high charge density can be maintained stably over a long period, and this electret can be easily formed into a film. An air filter prepared from this electret is very excellent in the dust collecting efficiency.

REFERENCES:
patent: 3607754 (1971-09-01), Asahina et al.
patent: 3793715 (1974-02-01), Murayama et al.
patent: 3985666 (1976-10-01), Ciccarelli et al.
patent: 4204135 (1980-05-01), Murayama
patent: 4215682 (1980-08-01), Kubik et al.
patent: 4513049 (1985-04-01), Yamasaki et al.

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