Title:
BATTERY SEPARATOR AND MANUFACTURE THEREOF
Document Type and Number:
Japanese Patent JP2984561
Kind Code:
B2
Abstract:
PURPOSE: To improve the capacity of a battery without deteriorating its life by using a separator made of an unwoven cloth which is produced by mixing a thermally adhesive fibers, divided composite fibers, and synthetic fibers of specified size with specified length, respectively, and specifying the thickness and the liquid retaining ratio of the separator.
CONSTITUTION: Slurry is produced by mixing 20-30wt.% of thermally adhesive fibers with 5-15mm length, 50-80wt.% of divided composite fibers with 5-15mm length and in the cross-section of which polyolefine polymer (A component) and ethylene-vinyl alcohol copolymer (B component) are reciprocally and adjacently arranged, and 10-30wt.% of synthetic fibers with 5-15mm length and having larger size than the extremely thin fibers which are the divided components of the composite fibers. The slurry is processed in wet-process paper manufacturing way, heat-treated, etc., to divide the composite fibers, to produce extremely thin fibers, to be entngles with one another, and to make a part of the fibers adhere to the rest and thus an unwoven cloth is produced. The obtained unwoven cloth is thermally calendered to have 0.08-0.15mm thickness and liquid retaining ratio 380% or more.
Inventors:
YAMAMOTO HIROYUKI
HAYASHI MASATAKA
HAYASHI MASATAKA
Application Number:
JP30546294A
Publication Date:
November 29, 1999
Filing Date:
November 15, 1994
Export Citation:
Assignee:
DAIWA BOSEKI KK
International Classes:
D04H1/485; D21H13/12; D21H13/14; H01M2/16; H01M2/18; (IPC1-7): H01M2/16; D04H1/48; D21H13/12; H01M2/18
Domestic Patent References:
| JP7153441A | ||||
| JP3257755A | ||||
| JP5214653A | ||||
| JP729561A |