Process for producing reinforced microporous membrane

Details Process for producing reinforced microporous membrane Process for producing reinforced microporous membrane

1984-09-17

1987-02-24

Spear, Frank

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

21050038, 427245, B01D 1300

Patent

active

046456023

ABSTRACT:
A process for producing an integral single layer polymeric microporous filter membrane within which a reinforcing web is embedded. The process comprises passing a reinforcing web through a first reservoir of casting solution of polymer and then simultaneously calendering both sides of the coated web to provide for penetration of the solution into the web and to remove substantially all entrapped air from the web. The calendered reinforcing web is then passed through a second reservoir of casting solution and then through a quenching bath to form micropores throughout the coatings.

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