Ultrafiltration Membranes and Methods of Making
A U.S. Patent for “Ultrafiltration Membranes and Methods of Making” was awarded to MilliporeSigma on August 25th, 2020. The present invention is a multilayered, flat sheet, composite membrane produced from at least two polymer solutions, the flat sheet membrane having at least one asymmetric ultrafiltration layer in which particles having a 20 to 100 nanometer (nm) diameter are retained and at least one asymmetric microporous layer in which particles larger than 0.1 .mu.m are retained, wherein the polymer solutions include a first polymer solution that forms the at least one ultrafiltration layer and a second polymer solution that forms the at least one microporous layer… Learn More