PRODUCTION OF POROUS POLYAMIDE FIBER

摘要

PURPOSE:To obtain a porous polyamide fiber having excellent feeling, luster and water-absorption by melting and mixing a polyester containing an organic sulfonic acid metal salt and a polyamide at a specific ratio, spinning and drawing the mixture and thinning the obtained fiber with an alkali. CONSTITUTION:A blended spun fiber is produced by spinning and drawing a mixture produced by melting and mixing 1-40wt.% of a polyester containing 0.1-20mol% (based on the acid component of the polyester) of an organic sulfonic acid metal salt and 99-60wt.% of a polyamide. The fiber is subjected to alkali thinning treatment to dissolve and remove at least a part of the polyester and form fine stripe holes longitudinally extending on the fiber surface.