PROCESS FOR PRODUCING SEPARATION FUNCTIONAL FIBERS AND ION-EXCHANGE FIBERS PRODUCED THEREFROM

• Main Authors: SUGO TAKANOBU, SHIMA HIROYUKI, FUJIWARA KUNIO, YAMADA TOSHIHIKO
• Format: Patent
• Language: English; Korean
• Published: 25.06.2003
• Edition: 7
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS; CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOSITIONS BASED THEREON; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; NATURAL OR ARTIFICIAL THREADS OR FIBRES; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; SPINNING; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP; THEIR RELEVANT APPARATUS; TRANSPORTING; WORKING-UP

PURPOSE: A process for producing separation functional fibers by radiation-initiated graft polymerization that have functional groups introduced densely at their surfaces and which will experience less physical and chemical deteriorations, and ion-exchange fibers and an ion or gas adsorber from the separation functional fibers are provided. CONSTITUTION: The gas adsorber is characterized in that it is produced by the steps of exposing fibers with a core/sheath structure to an ionizing radiation and then grafting a polymerizable monomer onto the sheath to provide a sulfonic group thereon for gas adsorption, wherein the sheath is a polyolefin and the core(1) is polyester, whereby the sheath(2) and the core are partially separated from one another over part of their interface and partially contact one another along their interface, forming a fabric from the fibers, and heat-bonding sheaths of adjacent fibers to one other, wherein the polymerizable monomer is glycidyl methacrylate, wherein the fibers with a core/sheath structure have such a cross-sectional shape such that a single core is arranged either concentric or eccentric with the sheath, and wherein the fibers with a core/sheath structure are selected from the group consisting of single fibers, processed products thereof, a woven or a nonwoven fabric which are an assembly of the single fibers, and processed products of the woven or nonwoven fabrics.