POLYOXYMETHYLENE POLYMER PELLETS, PROCESS FOR MANUFACTURING POLYOXYMETHYLENE POLYMER PELLETS, AND QUALITY EVALUATION METHOD FOR POLYOXYMETHYLENE POLYMER PELLETS

摘要

The present invention minimizes, during the molding of polymer pellets which comprise a polyoxymethylene polymer into molded parts, the adhesion of deposit onto a mold and the generation of formaldehyde. The present invention provides polyoxy- methylene polymer pellets which comprise (A) 100 parts by mass of a polyoxymethylene polymer, (B) 0.01 to 1.0 part by mass of a sterically hindered phenol antioxidant and (C) 0.01 to 0.10 part by mass total of melamine and methylol melamine and in which the content ratio of methylol melamine to the total of melamine and methylol melamine is so regulated as to fall within a specific range.