Method for preparing colored light-extinction polyester filament

Abstract

The invention relates to a method for preparing a colored light-extinction polyester filament. The method comprises the following steps of: firstly smashing a polyester chip after being subjected to pre-crystallization into powder and mixing the power with pigment and a light-extinction agent to obtain a mixture, and then drying the mixture and adding a dispersing agent after solid phase polymerization, and melting and extruding to obtain a polyester master batch; and mutually mixing the melted and extruded polyester master batch with a melt of a polyester parent body, then spinning and shaping to obtain a tow, and air blast cooling and shaping to obtain the polyester filament after oiling through an oil tanker, drawing and winding. According to the invention, solid phase polymerization on polyester is carried out in the preparation process of the master batch so that the excessive degradation of the polyester is avoided, the viscosity of the polyester is increased, the subsequent spinning operation is easy and the product quality of filament is improved; ethers, polyhydric alcohol or ester compounds serving as dispersing agents are added in the master batch preparation process so that the pigment and the light-extinction agent are easily dispersed without condensing, the filament spinnability is greatly improved and the sequence processability of the filament is improved; and the manufacturing cost is greatly saved.

Description

technical field [0001] The invention relates to a method for preparing colored matte polyester filaments. Background technique [0002] Polyester is an important variety of synthetic fibers and is the trade name of polyester fibers in my country. It is a fiber-forming high polymer prepared from purified terephthalic acid (PTA) or dimethyl terephthalate (DMT) and ethylene glycol (EG) through esterification or transesterification and polycondensation reactions— - Polyethylene terephthalate (PET), fibers made by spinning and post-processing. Polyester filament is a filament made of polyester with a length of more than one kilometer, and the filament is wound into a ball. [0003] As an important raw material for the textile industry, polyester filament has alleviated the shortage of natural fibers to a large extent. It has become the largest synthetic fiber variety among chemical fibers and is widely used in clothing, decoration, home textiles, industrial textiles and nationa...

AI Technical Summary

Problems solved by technology

Chinese patent "Preparation method of colored flame-retardant matting hollow polyester filament", application number 200910303607.6, application date 2009-06-24, this patent solves the problem of difficult polyester dyeing

But the cost of preparing polyester filament according to the method in this invention is higher, after adding color masterbatch and delustering agent, cause the spinnability of polyester filament to deteriorate, resulting in poor product quality