High-performance electret and air filter
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United States of America Patent
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-
Dec 2, 1986
Grant Date -
N/A
app pub date -
Apr 23, 1985
filing date -
Apr 24, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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