PREPARATION METHOD OF POLYAMIDE RESIN AND POLYAMIDE FIBER

摘要

PROBLEM TO BE SOLVED: To obtain a desired amount of end groups by adding a regulator to regulate the amount of end groups to a polyamide resin after polymerization and to provide a means for obtaining a polyamide resin which has good workability during melt processing and good quality. SOLUTION: This preparation method of a polyamide resin comprises a polymerization step in which a raw material for polymerization is polymerized to obtain a polyamide resin; a step of adding a regulator to regulate the amount of end groups to the polyamide resin obtained in the polymerization step and melt blending the same; and a step of removing unreacted regulator to regulate the amount of end groups and its derivative in the polyamide resin obtained in the step of melt blending such that the amount of the unreacted regulator to regulate the amount of end groups and its derivative is 10 ppm or lower based on the polyamide resin.