SPANDEX FIBER HAVING EXCELLENT CHLORINE RESISTANCE AND DISCOLORATION RESISTANCE AND METHOD FOR PREPARING SAME

摘要

The purpose of the present invention is to solve problems of easy discoloration of a chlorine-resistant spandex fiber employing an inorganic chlorine resistant agent when left in the air, a short-term or temporary chlorine resistant effect, and the loss of a unique trait of a spandex fiber, and to provide a spandex fiber having excellent chlorine resistance and discoloration resistance and a method for preparing the same, wherein the spandex fiber is prepared by adding and mixing, as organic additives for improving chlorine resistance added in the preparation of a normal chlorine-resistant spandex fiber, at least one compound among symmetric di-hindered hydroxyphenyl-based compounds and mono-hindered hydroxyphenyl-based compounds, an additive containing a semicarbazide-based compound having heat resistance and a radical scavenger function, and an urethane-based additive containing a tertiary butyl group serving as a secondary antioxidant, into a slurry of a polyurethane solution, thereby preparing a spinning solution, followed by defoamation, dry spinning, and winding.