HYDROPHILIC POLYPROPYLENE POROUS MEMBRANE, PROCESS FOR ITS PRODUCTION, AND APPARATUS FOR SEPARATING BLOOD PLASMA

摘要

A hydrophilic porous membrane having fine network structure and substantially comprising polypropylene is disclosed, which has on at least one side thereof a surface layer of about the same network structure as that of the inner portion, in which a hydrophilic polymer is chemically bonded to the membrane surface and fine pore surface, and which has an average pore size of 0.1 to 2.0 mu m, a bubble point of up to 2.0 kg/cm<2>, voids of 60 to 85 %, and a water-penetrating amount of 2 ml/min.mmHg.m<2> or more. This membrane is useful as a hydrophilic, plasma-separating membrane. A process for its production and a plasma-separating apparatus containing this membrane in a housing are also disclosed.