LOW-STRESS INJECTION MOLDING METHOD OF AMORPHOUS OR MICROCRYSTALLINE POLYAMIDE AND LOW-STRESS POLYAMIDE MOLDING PRODUCED BY THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a low-stress injection molding method of an amorphous or microcrystalline polyamide and a molding produced by it.SOLUTION: In a low-stress injection molding method of an amorphous or micro-crystalline polyamide, a polyamide melt consisting of an amorphous or micro-crystalline polyamide or a mixture of two or more amorphous or micro-crystalline polyamides is injection-molded by using an injection mold. In the injection molding process, the temperature of the polyamide melt is adjusted to 255-310°C; the temperature of the injection mold is adjusted to 50-120°C; and the injection speed of the polyamide melt is adjusted to 10-50 mm/s.