Patent ID: 6756328
Filing Date: 2004-06-29
Classification: D03D,D10B,Y10T

Abstract:
A cation exchange membrane wherein a plain weave reinforced cloth is embedded in a fluorinated polymer having a sulfonic acid group and/or a carboxylic acid group, characterized by possessing therein a tubular path which is formed in a direction of a warp and a weft of the plain weave reinforced cloth and has a cross section flat to a direction of thickness of the membrane,wherein the tubular path has a cross section having a degree of flatness of not more than 2; and wherein the tubular path has been formed by dissolution of sacrificial threads, and the sacrificial threads are of 20 to 50 denier and consist of a multi-filament composed of 4 to 8 mono-filaments of polyethylene terephthalate having a circular cross section.