Plugged microporous film

Details Plugged microporous film Plugged microporous film

B - Operations, Transporting

01

D

204/91.33, 117/8

B01D 67/00 (2006.01) A41D 31/00 (2006.01) A41D 31/02 (2006.01) B01D 69/12 (2006.01) B01D 69/14 (2006.01) B32B 3/26 (2006.01) B32B 5/18 (2006.01) C08J 7/12 (2006.01) C08J 9/26 (2006.01) C08J 9/42 (2006.01) D06N 3/00 (2006.01) D06N 7/00 (2006.01)

Patent

CA 1296225

Abstract A method of making a plugged microporous film from a film which comprises a structural component having pores extending therethrough, and a plugging material within the pores, the method comprising: (a) selectively treating the plugging material so that its susceptibility to a crosslinking treatment differs from a first region of the film to a second region thereof; (b) crosslinking the plugging material at the second region of the film; and (c) removing the uncrosslinked plugging material from the first region of the film leaving plugs of crosslinked plugging material in the pores at the second region of the film.

545104

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