PRODUCTION OF SEPARATION FUNCTIONAL FIBER, AND ION EXCHANGE FIBER AND GAS ADSORBING MATERIAL PRODUCED BY USING THE SAME

摘要

PURPOSE: To obtain an ion exchange fiber and a gas absorbing material by irradiating an ionizing radiation to a fiber having a specific core-sheath structure and grafting the fiber with a polymerizable monomer. CONSTITUTION: An olefinic polymer such as a polyethylene capable of producing a radical by irradiating ionizing radioaction rays such as -rays or electron beam is arranged in the sheath part of a fiber and a polyethylene terephthalate hardly causing degradation due to irradiation is arranged in the core part to afford a core-sheath type fiber concentrically or eccentrically formed in a shear-core weight ratio of 0.1-10 and the ionizing radioactive rays are irradiated to the core-sheath type fiber or fabric or nonwoven fabric made therefrom in which sheath parts of adjacent fibers are fused or its processed product, and then, the fiber is grafted with a polymerizable monomer such as glycidyl methacrylate to form the objective separation functional fiber. The core-sheath structure fiber or the separation functional fiber is subjected to radiation graft polymerization with a monomer other than styrene to provide the objective ion exchange fiber, and the objective gas adsorbing material is obtained by using the separation functional fiber.