POLYETHYLENE TEREPHTHALATE RESIN WATER CONTENT RATIO MEASURING METHOD

摘要

PROBLEM TO BE SOLVED: To solve the problems of requirements of a large-scale instrument, a measuring time for dozens of minutes, in order to measure ratio of water content of polyethylene terephthalate resin.;SOLUTION: A polyethylene terephthalate resin 10 weight section of pelletized state is immersed in sealing oil 20 weight section, adjusted to 15-25°C, irradiating microwave at a frequency of 2.45GHz and wavelength of 13.88cm, then a temperature of sealing oil is measured, and the ratio of water content of this polyethylene terephthalate is computed by formula 1 of water content ratio (p.p.m.)=0.07T³+0.78T²+11.05T+89.59 from temperature difference T (°C).;COPYRIGHT: (C)2004,JPO