POLYESTER RESIN FOR COMPRESSION MOLDING, MANUFACTURING METHOD OF PREFORM, PREFORM AND POLYESTER CONTAINER

摘要

PROBLEM TO BE SOLVED: To provide a polyester resin for compression molding which satisfies both of conveyablity to a compression molding machine and resin flowability on compression molding and has enhanced production efficiency, and an efficiently productive manufacturing method of a preform.

SOLUTION: The polyester resin for compression molding has surface tension at 280°C of 25-50 mN within an intrinsic viscosity (IV) range of 0.70-0.90 dL/g. The manufacturing method of the preform comprises supplying a melt resin mass composed of the polyester resin to a compression molding machine and compression molding the same.

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