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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[0037] Example 1
[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 combined with terephthalic acid (PTA), 1, 2-propanediol, and ethylene glycol. The molar ratio of (EG) monomers is 1:0.12:1.10. The ratio of each is continuously and stably measured and added to the slurry kettle for beating. In the beating kettle, tetrabutyl titanate and ethylene glycol antimony are added, of which tetrabutyl titanate The molar ratio of ester added to terephthalic acid is 0.01%, and the molar ratio of ethylene glycol antimony to phthalic acid is 0.02%;
[0040] Then the above-mentioned slurry is continuously and stably transported to the esterification-I, esterification-II, and esterification-III reactors, and the stabilizer is continuously added to the esterification-III reactor; the esterified compound is pumped to the polycondensation section, after Pre-...
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