Fabrication of membranes via combined evaporation and precipitant induced phase separation

Abstract

An ultrafiltration membrane and to a method for producing the ultrafiltration membrane which can include providing a polymer solution comprising a polymer, a high volatile solvent, a low volatile solvent, and a non-solvent, applying the polymer solution to the surface of a carrier or to a support layer to form a polymer layer on the carrier or on and/or partially or completely in the support layer, transporting the polymer layer from step with the optional support layer through an evaporation zone for partially evaporating the high volatile solvent under a relative humidity of less than 20% RH, and introducing the polymer layer with the optional support layer into a precipitation bath which comprises a precipitant, relative to the polymer in the polymer layer.

Dependencies are inferred from the claim text.