| 摘要 |
PURPOSE:To obtain the titled split yarns, having a high strength, improved dyability and light fastness, and dyeable with a basic dye, by subjecting a specific copolymer containing an isophthalic acid component containing metallic sulfonate groups, and a component having the alkali solubility different therefrom to the composite spinning, and treating the resultant yarns with an alkali. CONSTITUTION:(A) A component consisting of a polyester, having a dissolution rate of 4 times or more than of another component (B) in an aqueous solution of an alkali is fed through an opening 3 and an extruding hole 4 of the top plate 1 into an opening 8 of the bottom plate 2, and the component (B) consisting of a copolyester, having 0.7-2.4mol% isophthalic acid component having metallic sulfonate groups and 0.2-10wt% glycol component having 90-6,000 molecular weight and 80-100 polymerization degree is fed from a liquid reservoir 5 between the top and the bottom plates 1 and 2 through a groove 7 provided in a protruding part 6 into the opening 8, divided into plural parts by the component (A) and subjected to the composite spinning. The resultant yarns are then treated with an aqueous solution of an alkali to dissolve the component (A) partially and give the aimed split yarns. |
