| 摘要 |
PURPOSE:To carry out treatment for providing hydrophilicity of excellent durability, by heating polymerizing surface active monomer with polymerizable unsaturated link having HLB value of 2-20 and polymerization catalyst that are held on a porous surface of a porous polyolefin membrane. CONSTITUTION:A porous membrane having pores with a diameter of 0.01-5mum using ethylene, propylene, 4-methyl-1-pentene, fluoro-polyolefin, etc. After surface active monomer is held on the porous surface of at least a part of a said porous membrane, said monomer is polymerized by heating. Monomer has a molecular weight of under 10,000, HLB value of 2-20, and polymerizable unsaturated linkages. Hydrophilic part is composed of ethylene oxide, sulfonic acid groups, quaternary ammonium group, etc. After the addition of polymerization catalyst, solution of monomer is pressurized into pores of porous membranes to be polymerized by heating at a temperature of 30-100 deg.C for 1min-5hr.
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