1,2-propylene glycol modified terylene fully drawn yarn
A technology of polyester drawn yarn and fully drawn yarn is applied in the field of synthetic fibers, which can solve the problems of low thermal shrinkage and high crystallinity, and achieve the effects of uniform dyeing, stable fiber shrinkage and excellent spinning performance.
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[0038] Preparation process of modified polyester:
[0039] First, on the continuous polyester equipment, the monomers of terephthalic acid (PTA), 1, 2-propanediol and ethylene glycol (EG) are mixed according to the The molar ratio of (EG) monomers is 1:0.12:1.10, each of which is continuously and stably metered and added to the slurry tank for beating, and tetrabutyl titanate and ethylene glycol antimony are added to the beating tank, of which The molar ratio of the addition amount of ester to terephthalic acid is 0.01%, and the molar ratio of the addition amount of ethylene glycol antimony to phthalic acid is 0.02%;
[0040] Then the above slurry is continuously and stably transported to the reaction kettles of esterification-I, esterification-II and esterification-III, and stabilizers are continuously added to the reaction kettles of esterification-III at the same time; the esterified products are pumped to the polycondensation section, and after Modified polyester melt is ...
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