| 摘要 |
PROBLEM TO BE SOLVED: To provide a polytetrafluoroethylene (PTFE) fiber having a hollow section which has not been obtained yet, to provide a method for producing the same, and to provide a cloth given by using the same. SOLUTION: This PTFE fiber having the hollow section is produced by matrix spinning processes. The method for producing the PTFE fiber comprises using viscose as a matrix and spinning the fiber by discharging a liquid mixture of the viscose and an aqueous PTFE dispersion into a coagulation bath which is regulated to contain specified components and to have a specified concentration through a nozzle having a plurality of slits for obtaining the hollow fiber, wherein the spun fiber is characteristically baked so that the fiber is passed through a semi-baking process at a specified temperature, while being relaxed at a specified relaxation ratio, and then baked at a specified temperature. The cloth having collecting properties of fine dust more excellent than ever is obtained by using the PTFE fiber having the hollow section. COPYRIGHT: (C)2005,JPO&NCIPI
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