| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyurethane elastic fiber that can be stably spun for a long period of time, allows a raw yarn after heat treatment to have high stress retention, and has superior chlorine resistance and quality level when being knitted.SOLUTION: The polyurethane elastic fiber contains 1 wt.%-20 wt.% of dolomite represented by the following expression (1) with respect to a polyurethane polymer. Ca(CO)×Mg(CO) (1) |
