| 摘要 |
The present invention provides a spandex fiber with an improved stainability, which is manufactured by spinning a polyurethane urea spinning solution containing 0.5-3.0 wt% of a polyurethane-based dye enhancer which has 5000 or less molecular weight tertiary butyl amine groups, based on the solid of the polyurethane urea solution polymer, into a conventional polyurethane urea solution. The present invention has the effect of improving the stainability when knitted fabrics including a spandex fiber are dyed with an acid dye by applying a polyurethane-based dye enhancer having tertiary butyl amine. |
