kabura which is containment the temperature which at the resin which designates the jig null polyethylene terephthalate using for the thermal crystallization manner and its manner

摘要

PROBLEM TO BE SOLVED: To provide a method for thermally crystallizing the molded product of a biaxially oriented blow-molded bottle by reducing the diameter of the functional part of the mouth neck of the bottle after thermal crystallization to the tolerable size limits of sealing deformation in order to prevent the coupler of the mouth neck from being deformed by heating the molded product of the bottle of a single-layer structure or a laminated structure formed with a gas barrier material for thermal crystallization process and clamping the coupler, and a jig used in this method.;SOLUTION: This method for thermally crystallizing the top neck 4 of the molded product 1 of the biaxially oriented blow-molded bottle reduces the diameter of a coupler 6 to the tolerable size limits of sealing deformation by first heating the mouth neck 4 and clamping the coupler 6 kept at a temperature for thermal deformation from outside, in the method for thermally crystallizing the molded product 1 of the biaxially oriented blow-molded bottle formed of a resin composed mainly of PET with a helical strip 8 formed at the upper position of the mouth neck 4, the functional part 5 having the coupler 6 formed at the lower position and a neck ring 7 provided at the lower end part of the mouth neck 4. The jig 13 used in this method is provided.;COPYRIGHT: (C)2004,JPO