| abstract |
The present invention relates to semi-matte polyester drawn yarn and a preparation method therefor. The preparation method comprises: obtaining semi-matte polyester drawn yarn from a modified polyester melt according to a FDY process; and a preparation method for the modified polyester is: evenly mixing terephthalic acid, ethylene glycol, a main chain silicon-containing diol, a fluorine-containing dibasic acid, a matting agent and doped modified Bi 2 O 3 powder, and then carrying out an esterification reaction and a polycondensation reaction successively, wherein the fluorine-containing dibasic acid is 2,2-difluoro-1,3-malonic acid, 2,2-difluoro-1,4-succinic acid and 2,2-difluoro-1,5-glutaric acid or 2,2,3,3-tetrafluoro-1,4-succinic acid. The prepared product has a dye-uptake rate of 87.5-91.8% under 120°C temperature conditions, and the intrinsic viscosity thereof decreases 18-26% after being placed under 25°C temperature conditions and a relative humidity of 65% for 60 months. The preparation method of the present invention has a simple process, and the prepared product has good dyeing and degradation performances. |