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Title:
METHOD FOR MANUFACTURING ELECTRET MATERIAL
Document Type and Number:
Japanese Patent JP2010268445
Kind Code:
A
Abstract:

To provide a manufacturing method capable of providing an electret material having an excellent charge-retentive property with respect to heat.

The method for manufacturing an electret material includes: an irradiation step, a formation step and a charging step. In the irradiation step, a dispersion containing polytetrafluoroethylene microparticles is irradiated with γ-ray. In the formation step, the dispersion that has been irradiated with γ-ray is applied on an electrode plate, and thereafter dried, and the polytetrafluoroethylene microparticles are baked, thereby forming a polytetrafluoroethylene layer on the electrode plate. In the charging step, the surface of the polytetrafluoroethylene layer is subjected to a charging treatment.


Inventors:
Takaoka, Seiichi
Yamana, Kumie
Application Number:
JP2010000091083
Publication Date:
November 25, 2010
Filing Date:
April 12, 2010
Export Citation:
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Assignee:
NITTO DENKO CORP
International Classes:
H04R19/01; H01G7/02
Domestic Patent References:
JP2005045553A
JP2006287279A
JP2006063140A
JP2007314645A
JP2000115895A
JP2005045553A
Attorney, Agent or Firm:
鎌田 耕一
麻生 紀明



 
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