Non-woven fabric for alkali cell separator and process for produ

Details Non-woven fabric for alkali cell separator and process for produ Non-woven fabric for alkali cell separator and process for produ

1997-08-13

2000-06-27

Raimund, Christopher

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

42831151, 428913, 28104, 1621575, 264423, 264175, B32B 524, D04H 302

Patent

active

060804718

ABSTRACT:
The present invention provides a non-woven fabric for an alkali cell separator capable of preventing active materials from transfer, and having distinguished electrolyte solution absorbability and retainability in spite of a small areal weight and also provides a process for producing the same. The non-woven fabric is substantially free from perforations and has a center surface average roughness SRa of not more than 13 .mu.m at streaks of entanglement on at least one side of the non-woven fabric, a maximum pore diameter of not more than 50 .mu.m and a water absorbability under pressure of not less than 20 g/m.sup.2, and a standard deviation of pore diameter distribution of not more than 20 .mu.m, as determined by bubble point method.

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