Process for making a composite membrane with high selectivity an

Details Process for making a composite membrane with high selectivity an Process for making a composite membrane with high selectivity an

1995-06-02

1997-02-11

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

With printing or coating of workpiece

Coating or impregnating workpiece before molding or shaping...

264154, 26417113, 2642888, 427172, 427421, 427429, 4274342, B29C 6720

Patent

active

056017693

ABSTRACT:
A composite membrane including a microporous polymer film having a high air permeability as a support and a non-porous gas or vapor separating coating having a thickness of not more than 15 .mu.m is provided. The separation factor and flux of the membrane are substantially equal to those of the coating. Also provided is a process for the manufacture of a composite membrane including a support and a gas or vapor separating coating by drawing a polymeric film to which the coating material has been applied, and increasing the viscosity of the coating during drawing.

REFERENCES:
patent: 3369343 (1968-02-01), Robb
patent: 4602922 (1986-07-01), Cabasso et al.
patent: 4919856 (1990-04-01), Anazawa et al.
patent: 4931181 (1990-07-01), Blume et al.
patent: 5085776 (1992-02-01), Blume et al.
patent: 5160353 (1992-02-01), Gochanour
Patent Abstracts of Japan, vol. 15, No. 252 (C-844) May 1991 re JP-A-30 080 925.
Patent Abstracts of Japan, vol. 9, No. 301 (C-316) (2024) Jul. 1985 re JP-A-60 139 815.

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