Title:
MANUFACTURE OF PIEZOELECTRIC FILM
Document Type and Number:
Japanese Patent JPS6328081
Kind Code:
A
Abstract:
PURPOSE:To obtain a piezoelectric film which has uniform orientation and is free from variation of piezoelectric properties by a method wherein a sheet or a film is rolled by a rolling mill and given molecular orientation. CONSTITUTION:A sheet or film of synthetic polymer such as polyvinylidene fluoride which shows piezoelectric properties is rolled by a rolling mill with a reduction factor of more than 50 % and a poling treatment is applied to the rolled film. As the synthetic polymer which shows the piezoelectric properties, polyvinylidene fluoride or blended polymer of ployvinylidene fluoride and methacrylate system resin or vinyl acetate system resin may be employed. The blended polymer must contain polyvinylidene fluoride with a composition ratio of not less than 50 wt% and must be free from phase separation.
Inventors:
NAKAYAMA SHIRO
TAKAHASHI SHIGEMI
TAKAHASHI SHIGEMI
Application Number:
JP17106986A
Publication Date:
February 05, 1988
Filing Date:
July 21, 1986
Export Citation:
Assignee:
FUJIKURA LTD
International Classes:
B29C43/24; B29C55/18; H01L41/45; (IPC1-7): B29C43/24; B29C55/18; H01L41/22
Domestic Patent References:
| JPS61152418A | 1986-07-11 | |||
| JPS6055034A | 1985-03-29 |
Attorney, Agent or Firm:
Masatake Shiga