Porous diaphragms

Details Porous diaphragms Porous diaphragms

C - Chemistry, Metallurgy

25

B

117/88.5

C25B 13/08 (2006.01)

Patent

CA 1060286

ABSTRACT OF THE DISCLOSURE Porous diaphragms based on polytetrafluoroethylene are manufactured by forming a sheet of polytetrafluoroethylene in admixture with a sulid particulate additive to be removed therefrom, coating a surface of a polypropylene gauze and/or a surface the sheet of polytetrafluoroethylene with an aqueous emulsion of polytetrafluoroethylene, bonding the polytetra- fluoroethylene sheet to the polypropylene gauze by contacting the said surfaces under pressure, and subsequently romoving the solid particulate additive from the polytetrafluoroethylene sheet.

230163

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