FEATHER-LIKE YARN POLYESTER FIBER AND PREPARATION METHOD THEREFOR

摘要

The present invention relates to a feather-like yarn polyester fiber and a preparation method therefor. The preparation method is as follows: first uniformly mixing terephthalic acid, ethylene glycol, a main chain silicon-containing glycol and a fluorine-containing dibasic acid, then successively carrying out an esterification reaction and a polycondensation reaction to prepare a modified polyester, using a flat four-link annular spinneret to prepare a modified polyester POY wire from a modified polyester melt according to a POY process, and then fabricating a modified polyester DTY yarn from the modified polyester POY wire according to a DTY process, i.e. obtaining a feather-like yarn polyester fiber; and spinneret holes of the flat four-link annular spinneret are flat four-link annular holes. The prepared product has a dye-uptake rate of 89.6-93.7% under 130°C temperature conditions, and the intrinsic viscosity thereof decreases 13-20% after being placed under a temperature of 25°C at a relative humidity of 65% for 60 months. The preparation method of the present invention has a simple process and is low cost; and the prepared product has an excellent dyeing performance, a fast natural degradation rate and good application prospects.