SIMPLIFIED EVALUATION METHOD FOR PERFORMANCE OF SYNTHETIC RESIN MATERIAL IN LONG PERIOD, METHOD FOR MATERIAL DESIGN OF MOLDING USING THE METHOD, AND METHOD FOR QUALITY CONTROL

摘要

PROBLEM TO BE SOLVED: To provide a method capable of evaluating long term performance easily using a small amount of sample in a short time, or a method for material design of a molding requiring long term performance such as a pipe, and a method for controlling quality easily.;SOLUTION: In a test piece comprising a synthetic resin material, a tensile creep curve is measured for plural creep test stresses, and long term ductile breaking resistance performance and/or long term brittle fracture resistance performance of the molding comprising the synthetic resin are/is evaluated based on a relation between a time when a creep displacement amount in the creep curve starts to increase abruptly or a time of breaking before the creep displacement amount in the creep curve starts to increase abruptly, and the creep test stress therein.;COPYRIGHT: (C)2002,JPO