Material for heat-resistant electret and heat-resistant electret
AssigneeToho Kaseli Co., Ltd.
InventorsSusumu Kawato, Yoshinori Ohta
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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.
Claims19
A heat resistant electret material comprising a fluorocarbon resin,
- wherein the fluorocarbon resin is a modified polytetrafluoroethylene.
A heat resistant electret comprising a metal member and a heat resistant electret material that comprises a fluorocarbon resin and is disposed on a surface of the metal member,
- wherein the fluorocarbon resin is a modified polytetrafluoroethylene.
A heat resistant electret comprising a metal member and a resin film adhered to a surface of the metal member,
- wherein the resin film comprises polytetrafluoroethylene,
- a contact angle of a water droplet on one surface of the resin film is not greater than 110°, and
- said one surface of the resin film is adhered to the metal member.
A heat resistant electret comprising a metal member and a resin fim adhered to a surface of the metal member,
- wherein the resin film comprises polytetrafluoroethylene, and
- only a surface on the metal member side of the resin film has been subjected to an adhesion-improving treatment.
Dependencies are inferred from the claim text.