Ｐｏｗｄｅｒ―ｔｙｐｅ Ｔｈｅｒｍｏｐｌａｓｔｉｃｓ Ｐｏｌｙｕｒｅｔｈａｎｅ Ｒｅｓｉｎ Ｃｏｍｐｏｓｉｔｉｏｎｓ Ａｎｄ Ｐｒｅｐａｒｉｎｇ Ｍｅｔｈｏｄ

摘要

PURPOSE: A powdery thermoplastic polyurethane resin composition is provided to impart excellent moldability through the control of melting points and to prevent the degradation of properties. CONSTITUTION: A powdery thermoplastic polyurethane resin composition comprises 40~95 weight% of thermoplastic polyurethane, 2~55 weight% of polyester polyol oligomer, and 0.05~5 weight% of inorganic smoothing agent in which silicon dioxide is a main component. The thermoplastic polyurethane has a flow index of 60~70g/10 minute, melting temperature of 150 ~200°C, and shore A hardness of 70~95. The thermoplastic polyurethane includes diisocyanate, polyol and chain extender.