Title:
SEPARATOR FILM FOR ALKALINE BATTERY
Document Type and Number:
Japanese Patent JP3887027
Kind Code:
B2
Abstract:
PURPOSE: To provide a separator film for alkaline battery formed of a denaturated polyvinyl alcohol film containing 0.5-12 mole % of α-olefin units having four or less carbon atoms.
CONSTITUTION: This separator film for alkaline battery has a durability resistant also to a long-time use as the degree of swelling to alkali aqueous solution is suppressed. A conventional separator paper by mixing of synthetic fiber and cellulose fiber has a problem in that the pore diameter between the fibers is so large that the active materials of both poles in the battery inner part can not be perfectly separated to each other, causing an internal short-circuit. However, the film according to this invention has a strong film physical property even when it is swollen to some degree by alkali aqueous solution to provide an excellent performance free from internal short-circuit. The volume of the battery inner part is minimized because of the film form, and the battery capacity can be increased.
Inventors:
Ken Yuki
FUJIWARA NAOKI
Miyazaki Hirotoshi
FUJIWARA NAOKI
Miyazaki Hirotoshi
Application Number:
JP23933694A
Publication Date:
February 28, 2007
Filing Date:
October 04, 1994
Export Citation:
Assignee:
KURARAY CO.,LTD.
International Classes:
H01M2/16; (IPC1-7): H01M2/16
Domestic Patent References:
| JP598036A |