As early as 1894, Vorlander used and ethylene glycol to make polyester with low relative molecular weight; in 1898, Einkorn synthesized polycarbonate; Carothers synthesized aliphatic polyester : Most of the polyesters synthesized in the early years are aliphatic compounds, their relative molecular weight and melting point are all low, and they are easily soluble in water, so they do not have the use of textile fibers. In 1941, Whinfield and Dickson in England synthesized polyethylene terephthalate (PET) from dimethyl terephthalate (DMT) and ethylene glycol (eg). Fibers with excellent properties can be obtained by melt spinning. In 1953, the United States first built a factory to produce pet fiber. It can be said that pet fiber is a late-developed fiber among large-scale synthetic fibers.
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