Title:
METHOD FOR PRODUCING ELECTRET SHEET
Document Type and Number:
Japanese Patent JP2013258320
Kind Code:
A
Abstract:
To provide a method for producing an electret sheet that keeps high piezoelectricity even in use under high temperatures.
In a method for producing an electret sheet of the present invention, an olefin resin sheet is cured at a surface temperature thereof lower than a melting point of the olefin resin, and then charges are injected into the olefin resin sheet to be charged. In an electret sheet obtained by the method of the present invention, discharge of charges due to flow of a crystal part of an olefin resin under high temperatures is prevented, so that piezoelectricity thereof is hardly deteriorated with time even in use under high temperatures and the electret sheet has excellent piezoelectricity over a long period of time.
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Inventors:
KUSACHI KUNIO
UCHIDA KAZUHO
HATTA BUNGO
UCHIDA KAZUHO
HATTA BUNGO
Application Number:
JP2012133946A
Publication Date:
December 26, 2013
Filing Date:
June 13, 2012
Export Citation:
Assignee:
SEKISUI CHEMICAL CO LTD
International Classes:
H01G7/02; C08J9/06
Domestic Patent References:
| JPS62248213A | 1987-10-29 | |||
| JP2010186960A | 2010-08-26 |
Attorney, Agent or Firm:
Takuya Yamamoto