METHOD OF MANUFACTURING ASYMMETRIC POLYMER MEMBRANES Russian patent published in 1998 - IPC

Abstract RU 2104763 C1

FIELD: membrane technics. SUBSTANCE: one of the surfaces of polymer material is pretreated with liquid plasticizer, stretched in liquid medium until microcracks appear, and dried. According to invention, treatment by plasticizer lasts until thickness of plasticized layer is as high as 20 mcm. Resultant membrane is appropriate for separating and concentrating gases, vapors, and liquids in different areas. EFFECT: improved procedure. 2 cl

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RU 2 104 763 C1

Authors

Sinevich E.A.

Prazdnichnyj A.M.

Bakeev N.F.

Dates

1998-02-20—Published

1994-12-29—Filed