Material for heat-resistant electret and heat-resistant electret
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United States of America Patent
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Issued Date -
Aug 24, 2006
app pub date -
Jul 21, 2004
filing date -
Jul 22, 2003
priority date (Note) -
Abandoned
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Abstract
An electret is produced using a heat resistant electret material containing a fluorocarbon resin, in which a modified polytetrafluoroethylene is used as the fluorocarbon resin. Also, an electret including a metal member and a resin film adhered to a surface of the metal member is produced, in which the resin film contains polytetrafluoroethylene and only a surface on the metal member side of the resin film has been subjected to an adhesion-improving treatment. Thus, it is possible to provide a heat resistant electret exhibiting excellent charge retention ability at high temperatures.
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