NOZZLE FOR MOLDING POLYAMIDE, POLYAMIDE POLYMERIZATION REACTOR, AND PREPARATION OF POLYAMIDE

摘要

PURPOSE: To provide a nozzle which can control the generation of a product with a defective shape in the discharge and molding of molten polyamide. CONSTITUTION: Production is implemented with the use of a nozzle for molding polyamide which satisfies a formula of L/S0.5 0.45 and a polyamide polymerization reactor in which the nozzle is fixed to the polymer discharge part of the reactor. In the formula, S is the area of one passage of the nozzle, and L indicates the length of the passage in a part where the area of the passage of a nozzle hole H is smallest.