Preparation method of functional polyester fiber

Abstract

The invention relates to a preparation method of a functional polyester fiber. The preparation method comprises the following steps: performing esterification by stages, wherein dihydric alcohols, polyhydric alcohols and functional inorganic powder are mixed according to a certain mole ratio, in the first esterification stage, acid is slightly excess to ensure that monomers with low capability of participating in esterification reaction in the polyhydric alcohols fully react and are grafted into polyester molecular chains, and in the second esterification stage, the dihydric alcohols are replenished to control the terminal carboxyl group of copolyester. The preparation method has the advantages that polyhydric functional groups can improve the apparent viscosity of a system and play a role in wrapping the introduced functional inorganic powder (such as far infrared ceramic inorganic powder, titanium dioxide powder and zinc oxide antibacterial powder), thus improving the dispersion uniformity of particles; settlement is unlikely to happen in the polymerization process and then functional polyester is prepared through condensation polymerization; the functional polyester fiber is finally prepared by carrying out melt spinning on the prepared polyester, has good moisture absorption property and flexibility and can be widely used for preparing far-infrared moisture absorbing and sweat releasing antistatic and antibacterial fabrics next to the skin.

Description

technical field [0001] The invention belongs to the technical field of polyester fibers, and relates to a preparation method of functional polyester fibers, in particular to a method of adding high-content inorganic functional powders for in-situ polymerization, in which the first esterification acid is excessive and the second esterification stage alcohol The preparation method of forming functional polyester fibers by melt spinning through a circular or special-shaped spinneret. Background technique [0002] Since the large-scale industry of polyester fiber in the 1970s, its development speed has far exceeded that of other synthetic fibers. In 2012, my country's polyester fiber has accounted for more than 80% of my country's total chemical fiber, accounting for more than 70% of the world's polyester fiber. Polyester fiber is currently the most widely used variety of synthetic fibers. The molecular structure of polyester is regularly arranged and the degree of crystallinit...

AI Technical Summary

Problems solved by technology

However, the apparent viscosity of diols and dibasic acids in traditional polyester preparation is relatively low, and the introduced functional inorganic powder is prone to agglomeration due to its small particle size. At the same time, the amount of inorganic functional powder added must be strictly controlled within In a very small range, otherwise it will have extremely adverse effects on the polymerization process and spinning forming process, and the extremely small amount of inorganic functional powder added cannot achieve the expected functional effect