Title:
エレクトレットシート
Document Type and Number:
Japanese Patent JP6798898
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an electret sheet which holds high piezoelectricity even in a high temperature environment.SOLUTION: An electret sheet includes an electric-charged porous sheet, and has the specific volume resistance of 1.0×10Ω cm or more at 25°C under a constant pressure load of 100 kPa, and the breakdown voltage of 5.5 kV or more at 25°C under a constant pressure load of 100 kPa. The electret sheet therefore maintains excellent piezoelectricity even after left derelict for a long period under a high-temperature atmosphere.SELECTED DRAWING: None
Inventors:
Tetsuhiro Kato
Kamiya Nobuto
Masahiro Tsuchiya
Kuzu Yuta Yuta
Yasuyuki Shirasaka
Kamiya Nobuto
Masahiro Tsuchiya
Kuzu Yuta Yuta
Yasuyuki Shirasaka
Application Number:
JP2017019862A
Publication Date:
December 09, 2020
Filing Date:
February 06, 2017
Export Citation:
Assignee:
Sekisui Chemical Co.,Ltd.
International Classes:
G01L1/16; H01G7/02; H01L41/08; H01L41/193; H01L41/45
Domestic Patent References:
| JP2011216661A | ||||
| JP201411282A | ||||
| JP5598581B2 | ||||
| JP6334091B2 | ||||
| JP5615988B2 | ||||
| JP6018888B2 | ||||
| JP5820374B2 | ||||
| JP3286998B2 | ||||
| JP510961B2 | ||||
| JP829213B2 |
Foreign References:
| US20100252047 |
Attorney, Agent or Firm:
Takuya Yamamoto