THERMOPLASTIC POLYURETHANE ELASTOMER, METHOD AND DEVICE FOR MANUFACTURE THEREOF, AND ELASTIC FIBER MADE THEREFROM

摘要

A thermoplastic polyurethane elastomer containing only a minute quantity of small masses of grains and having a high molecular weight and a narrow molecular weight distribution. A high-quality thermoplastic polyurethane elastomer has such an excellent melt-moldability that it can be melt-spun into fibers while preventing filament breakage. The elastomer can be manufactured by the melt-polymerization of a prepolymer with a low-molecular diol at a relatively high temperature in a short period of time. This invention also provides a device for manufacturing such an elastomer and fibers to be spun therefrom.