Title:
PIEZOELECTRIC MATERIAL OF HIGH MOLECULAR WEIGHT
Document Type and Number:
Japanese Patent JPS59138221
Kind Code:
A
Abstract:
PURPOSE: A piezoelectric material that is obtained by converting a copolymer of vinylidene fluoride and hexafluoroacetone into an electret, thus showing high piezoelectric efficiency and being suitable in an piezoelectric element.
CONSTITUTION: A film or sheet of vinylidene fluoride and hexafluoroacetone copolymer is drawn at a more than 200% draw ratio. The resultant film is, when necessary, fixed to a jig and converted into an electret, preferably by corona discharge to produce the objective piezoelectric material.
Inventors:
YAMAMOTO KAZUHIKO
NEJIGAKI KAZUMI
YASUMURA TAKASHI
KAWASHIMA CHIKAFUMI
INOUE SHIYUUICHI
NEJIGAKI KAZUMI
YASUMURA TAKASHI
KAWASHIMA CHIKAFUMI
INOUE SHIYUUICHI
Application Number:
JP1216983A
Publication Date:
August 08, 1984
Filing Date:
January 28, 1983
Export Citation:
Assignee:
JAPAN SYNTHETIC RUBBER CO LTD
CENTRAL GLASS CO LTD
CENTRAL GLASS CO LTD
International Classes:
C08G2/00; C08G2/10; C08G2/26; C08G61/00; C08G61/10; C08G61/12; C08J7/00; (IPC1-7): C08G2/26; C08G61/12; C08J7/10
Attorney, Agent or Firm:
Okuyama Nao