| 摘要 |
A fluororesin polymer separation membrane that excels in not only virus removal performance but also water permeation performance, chemical strength (especially chemical resistance), physical strength and contamination resistance, especially being suitable for use as a filtration membrane for virus removal; and a process for producing the same. There is provided a fluororesin polymer separation membrane comprising a layer of three-dimensional network structure and a layer of spherical structure, wherein the layer of three-dimensional network structure substantially does not contain macrovoids of 5 mum or greater, the fluororesin polymer separation membrane exhibiting a filtration performance such that the efficiency of removing of dextran of 7.5x104 molecular weight is 80% or higher. The layer of three-dimensional network structure is produced by coagulation of a polymer solution containing a fluororesin polymer and a cellulose ester. |
