Thermoplastic Resin Powder and Method for Producing Same

摘要

The objective of the present invention is to provide a thermoplastic resin powder that suppresses a decrease in fluidity of a composition during melt molding and that has a suppressed alteration of the resin resulting from retention. The thermoplastic resin powder is obtained by coagulating a polymer from a latex produced by means of emulsion polymerization of a monomer, the content of metal-corroding free acids in the thermoplastic resin powder is no greater than 500 ppm, and the thermoplastic resin powder satisfies a predetermined formula (1).

主权项

1. A thermoplastic resin powder obtained by coagulating a polymer from a latex produced by means of emulsion polymerization of a monomer, in which the content of metal corroding free acids in the thermoplastic resin powder is no greater than 500 ppm, and the thermoplastic resin powder satisfies the following Formula (1):
75≦flow retention rate (%)≦200  (1) with the proviso that the above flow retention rate is defined by (MFR20/MFR4)×100, wherein: MFR20 indicates melt flow rate after maintaining for 20 minutes at conditions including 250° C. and a load of 49 N, and MFR4 indicates melt flow rate after maintaining for 4 minutes at conditions including 250° C. and a load of 49 N.