Method of obtaining membrane-type separators

Details Method of obtaining membrane-type separators Method of obtaining membrane-type separators

H - Electricity

01

M

154/101, 204/91.

H01M 2/16 (2006.01) C08J 7/10 (1980.01)

Patent

CA 1114276

ABSTRACT OF THE DISCLOSURE : The present invention relates to a method for the production of membrane battery separators by grafting a vinyl monomer to a polyolefin film, activated by ultraviolet irradiation, and heating the film. The grafting is effected in a five-layer sandwich which com- prises the activated polyolefin film, covered from both sides with cellulose material, impregnated with the monomer or its solution and pressed from each side by an inert pol- ymer band enclosing the reaction space. The sandwich is then pressed from 10 to 45 minutes against a heater with a pressure towards the surface of the heating element of from 10 to 30 g/cm2, the layers of the sandwich being bands endless in length, the sandwich being passed over the sur- face of the heating element at a velocity of 1 to 100 m/hour.

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