Process for producing porous membranes

Details Process for producing porous membranes Process for producing porous membranes

1987-05-28

1989-09-26

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

21050035, 21050036, 21050042, 264 83, 264500, 264DIG13, C08J 928

Patent

active

048698571

ABSTRACT:
Porous membranes are produced by dissolving a film-forming polymer in a good solvent for the polymer, forming a film of the resulting polymer solution, and forcibly contacting saturated steam or mist-containing steam with at least one surface of said film. Such porous membranes have pores having a narrow pore diameter distribution and extending in a direction substantially perpendicular to the membrane surface at a high surface pore density on at least one surface thereof.

REFERENCES:
patent: 2783894 (1957-03-01), Lovell et al.
patent: 2850467 (1958-09-01), Livingood
patent: 2926104 (1960-02-01), Goetz
patent: 2983960 (1961-05-01), Jilge
patent: 4025685 (1977-05-01), Haren et al.
patent: 4177228 (1979-12-01), Prolss
patent: 4212839 (1980-07-01), Funahashi
patent: 4226886 (1980-10-01), Lakes
Patent Abstracts of Japan, vol. 9, no. 237, (C-305), [1960], Sep. 24th, 1985; & JP-A-60 97 001, (Teijin K.K.), 30-05-1985, *Whole Abstract*.

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