| 摘要 |
PROBLEM TO BE SOLVED: To produce dyed products of a polyamide-based fiber having a high retention of stretch after being exposed to lights, excellent in light resistance and suitable for jackets, sports wears, etc., by dyeing a specific polyamide-based fiber structure with a reactive dye. SOLUTION: A polyamide-based dyed product, having 80-100% retention of strength and elongation, respectively, after 40 hours of irradiation of a carbon arc lamp, 70-100% retention of the strength-elongation product and the forth degree of scavenging fastness (JIS L0844 A-2 method) in discoloration and stain, is obtained by dyeing a fiber structure such as a plane fabric or the like made by using a low crystalline or low oriented polyamide-based fabric having 30-42% degree of crystallization, >=60% elongation, <=210 kg/mm2 Young's modulus and a structural difference in the longitudinal direction of the fiber, e.g. a thick and thin style, in which the ratio of the cross sections of the thin part and the thick part is (1:1.2)-(1:5), and/or >=0.5% crystallinity difference, with a reactive dye.
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