Title:
BATTERY SEPARATOR AND MANUFACTURE THEREOF
Document Type and Number:
Japanese Patent JP2960284
Kind Code:
B2
Abstract:
PURPOSE: To provide a separator suitable for use in a nickel-hydrogen battery, by mixing specified divided-type composite fibers, thermally adherable fibers, and specified synthetic fibers in a specified ratio and performing wet paper making with respect to the resulting mass, and, after performing high-pressure water treatment, performing thermal calender treatment and thereby making each of the tensile strength and liquid- retaining percentage greater than specified.
CONSTITUTION: A 5-15mm length divided type composite fiber (D fiber) which has section in which a polyolefin polymer (A component) and an ethylene vinyl alcohol copolymer (B component) are alternately disposed in an adjacent manner to each other is prepared. A 60 to 80wt.% of this D fiber, 20 to 30wt.% of thermally adherable composite fiber (T fiber), and 10 to 20wt.% of 5-15mm length synthetic fiber having a greater deniel than that of post-division ultra-fine fiber of the D fiber as well as the T fiber are mixed together, whereupon wet paper making is performed. After desiccation of the resulting mass, high-pressure water treatment is carried out, and after the D fibers have been divided and the relevant fibers have been thus entangled with one another, thermal calender treatment is performed. As a result, a separator with a finished thickness of 0.15 to 0.21mm which has a longitudinal tensile strength of 6.0kg/15mm or more and a liquid-retaining percentage of 380% or more is provided.
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Inventors:
YAMAMOTO HIROYUKI
Application Number:
JP15620693A
Publication Date:
October 06, 1999
Filing Date:
June 01, 1993
Export Citation:
Assignee:
DAIWA BOSEKI KK
International Classes:
D04H1/492; D21H13/10; D21H13/12; D21H15/10; H01M2/16; (IPC1-7): H01M2/16; D04H1/46
Domestic Patent References:
| JP3257755A | ||||
| JP5109397A | ||||
| JP609056A | ||||
| JP3233856A |