Patent ID: 6127433
Filing Date: 2000-10-03
Classification: B01D,B01J,D01F

Abstract:
A process for producing a gas adsorber, comprising:providing fibers with a core/sheath structure wherein the sheaths of said fibers are made of polyethylene and the cores of said fibers are made of polyethylene terephthalate;subjecting said fibers to ionizing radiation and then grafting a polymerizable monomer onto the sheath of said fibers, wherein the polyermizable monomer is a monomer having ion-exchange groups or a monomer in which ion-exchange groups can be introduced by carrying out a further reaction after graft polymerization, the monomer having ion-exchange groups comprising acrylic acid, methacrylic acid, sodium styrenesulfonate, sodium methallylsulfonate or sodium allylsulfonate, and the monomer in which ion-exchange groups can be introduced by carrying out a further reaction after graft polymerization comprises acrylonitrile, acrolein, vinylpyridine, chloromethylstyrene or glycidyl methacrylate;wherein, after said grafting, said sheath and said core partially contact one another along their interface and are partially separated from one another along part of their interface; andcrossing said fibers over one another and heat fusing sheaths of adjacent fibers together.