Method of preparing a supported microporous filtration membrane

Details Method of preparing a supported microporous filtration membrane Method of preparing a supported microporous filtration membrane

1995-05-26

1996-03-19

Fortuna, Ana M.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

210490, 21050038, 21050036, 210508, 21050042, 427245, 427294, 4274021, B29C 6500, B01D 2900

Patent

active

055001670

ABSTRACT:
The present invention provides a supported microporous filtration membrane comprising a porous nonwoven fibrous support material having first and second sides, and a continuous microporous membrane having first and second zones, wherein the first side of the support material is integral with the first zone while not protruding into the second zone, and the first zone has a pore size at least about 50% greater than the pore size of the second zone. A method of preparing such a supported microporous membrane is also provided by the present invention.

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