| 摘要 |
PROBLEM TO BE SOLVED: To provide thermoplastic polyurethane improved in heat resistance and hydrolysis resistance while maintaining favorable molding performance.SOLUTION: The thermoplastic polyurethane is not lower than 80% in fracture elongation retention when a hygrothermal aging test is performed in an atmosphere at a temperature of 90°C and relative humidity of 95°C for 500 hours. |
