WELDED BODY MANUFACTURING METHOD

摘要

Provided is a method for solving the problem of lowered laser transmissivity in molded bodies molded from crystalline thermoplastic resin composites even in cases where specific crystalline thermoplastic resins or specific additives are not used. Using a metal mold in which an insulating layer has been formed in one part of the cavity surface thereof, an optically transparent resin molded body used for joining by laser welding is produced under conditions in which the temperature of the metal mold is at least 10°C lower than the cold crystallization temperature (Tc1) of the resin that forms the optically transparent resin molded body.