Microporous polymer films and methods of their production

Details Microporous polymer films and methods of their production Microporous polymer films and methods of their production

1994-04-06

1995-06-06

Foelak, Morton

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521 82, 521 97, 521143, 521146, 521155, 521182, 521184, C08J 928

Patent

active

054223776

ABSTRACT:
A process for producing thin microporous polymeric films for a variety of uses. The process utilizes a dense gas (liquified gas or supercritical fluid) selected to combine with a solvent-containing polymeric film so that the solvent is dissolved in the dense gas, the polymer is substantially insoluble in the dense gas, and two phases are formed. A microporous film is obtained by removal of a dense gas-solvent phase.

REFERENCES:
patent: 3852388 (1974-12-01), Kimura
patent: 4818254 (1989-04-01), Anand et al.

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