Process of making microporous hollow fiber or film membrane of p

Details Process of making microporous hollow fiber or film membrane of p Process of making microporous hollow fiber or film membrane of p

1991-08-19

1993-09-21

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

264184, 264203, 264205, 2642103, 2642108, 26421115, 26421116, 26421118, 26421119, 2642888, 2642896, 2642905, B29C 6720, D01D 5247

Patent

active

052466477

ABSTRACT:
The present invention relates to a process for preparing a microporous permselective membrane from a poly(phenylene sulfide) (PPS) polymer, an organic compound which substantially solubilizes the PPS below its melting point to form a homogenous mixture, heating the resulting mixture, extruding or casting the mixture into a membrane (fiber or film), quenching or coagulating the membrane, and leaching the membrane, while optionally drawing the membrane before, during, after leaching, or a combination thereof. In one embodiment, the solvent optionally includes an organic non-solvent to assist in obtaining the desired microporsity. The permselective polymers are useful to separate gaseous or liquid components from a mixture of components.

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