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Hydrophilic polyester fiber and preparation method thereof

A polyester fiber and hydrophilic technology, applied in the field of textile fibers, can solve problems affecting production stability, dripping, plugging holes, etc., and achieve the effect of smooth spinning process, overcoming yellowing, and excellent hue

Active Publication Date: 2018-06-22
CHINA TEXTILE ACADEMYTIANJINSCI & TECH DEV CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, condensable gases such as alcohols, esters, and aldehydes produced by the thermal degradation of polyhydroxy flexible polyester will pollute the surface of the spinneret of the spinning assembly during the spinning process, resulting in dripping, clogging, etc. Seriously affect the stability of production

Method used

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  • Hydrophilic polyester fiber and preparation method thereof
  • Hydrophilic polyester fiber and preparation method thereof
  • Hydrophilic polyester fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] (1) Terephthalic acid and ethylene glycol are prepared into a slurry according to a molar ratio of 1:1.15;

[0074] (2) The slurry prepared in step (1) is continuously added to the esterification system composed of the first vertical esterification kettle and the second vertical esterification kettle for esterification reaction, and the first esterification kettle reacts The temperature is 260°C, the reaction pressure is 500kPa, the reaction temperature of the second esterification tank is 265°C, and the reaction pressure is 120kPa. When the degree of polymerization of the ethylene terephthalate oligomer reaches 5, the ethylene terephthalate Glycol ester oligomers are continuously and stably withdrawn from the esterification tank through the oligomer pump;

[0075] (3) The ethylene terephthalate oligomer prepared in step (2) is adjusted to 235° C. through a heat exchanger, and then polyethylene glycol and dipentaerythritol / bis( 2,4-di-p-isopropylphenyl)pentaerythritol ...

Embodiment 2

[0080] (1) Terephthalic acid and ethylene glycol are prepared into a slurry according to a molar ratio of 1:1.05;

[0081] (2) The slurry prepared in step (1) is continuously added to the esterification system composed of the first vertical esterification kettle and the second vertical esterification kettle for esterification reaction, and the first esterification kettle reacts The temperature is 275°C, the reaction pressure is 400kPa, the reaction temperature of the second esterification tank is 275°C, and the reaction pressure is 200kPa. When the polymerization degree of the ethylene terephthalate oligomer reaches 8, the oligomer is passed through the low The polymer pump is continuously and stably withdrawn from the esterification tank;

[0082] (3) The ethylene terephthalate oligomer prepared in step (2) is adjusted to 250° C. through a heat exchanger, and then mixed with polyethylene glycol and pentaerythritol / tri[2.4 ​​with a molecular weight of 8000 added online. -Di-t...

Embodiment 3

[0087] (1) Terephthalic acid and ethylene glycol are prepared into a slurry according to a molar ratio of 1:2.0;

[0088] (2) The slurry prepared in the step (1) is continuously added to the esterification system composed of a vertical esterification tank for esterification reaction. The reaction temperature of the esterification tank is 240 ° C and the reaction pressure is 100 kPa. When the degree of polymerization of the ethylene glycol phthalate oligomer reaches 1, the oligomer is continuously and stably extracted from the esterification kettle by the oligomer pump;

[0089] (3) The ethylene terephthalate oligomer prepared in step (2) is adjusted to 200° C. through a heat exchanger, and then mixed with polyethylene glycol and glycerol / ethylene glycol with a molecular weight of 200 added online. Triphenyl phosphate / N,N'-bis-(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl)hexamethylenediamine / cobalt acetate / tetraethyl titanate The alcohol solution is mixed uniformly by a tub...

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Abstract

The invention belongs to the technical field of textile fibers, and particularly relates to a hydrophilic polyester fiber and a preparation method thereof, wherein the hydrophilic polyester fiber is obtained by carrying out melt spinning on a hydrophilic polyester, and the hydrophilic polyester is obtained by polymerizing a ethylene glycol terephthalate oligomer and polyether diol under the actionof a titanium metal alkoxide, a polyhydroxy compound and a phosphorus compound / hindered phenol compound / acetate complex. According to the present invention, the hydrophilic polyester fiber has characteristics of yellowing resistance, reduced viscosity reduction during molding processing, good moisture absorption performance, good normal pressure dyeing performance, no heavy metal pollution, softhand feeling and excellent hue.

Description

technical field [0001] The invention belongs to the technical field of textile fibers, and in particular relates to a hydrophilic polyester fiber and a preparation method thereof. Background technique [0002] Polyester fiber has the advantages of high breaking strength, stable shape, good crispness, anti-wrinkle and non-ironing, easy to wash and dry, and is an ideal textile fiber. [0003] However, due to the high regularity of polyester molecular chains, lack of hygroscopic groups such as hydroxyl groups and amino groups, and only ester groups with low polarity, these structural characteristics endow polyester fibers with excellent mechanical properties and also make polyester fibers There are disadvantages such as low hygroscopicity, and the fabric feels damp and stuffy when worn, which reduces its wearing comfort. [0004] Therefore, how to improve the hydrophilic properties of polyester fibers and improve the moisture permeability of their fabrics is one of the importa...

Claims

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Application Information

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IPC IPC(8): D01F6/84C08G63/672C08G63/85D01D1/00D01D4/04
CPCC08G63/672C08G63/85D01D1/00D01D4/04D01F6/84
Inventor 邱志成钟淑芳李志勇金剑刘玉来杨喆陈伟
Owner CHINA TEXTILE ACADEMYTIANJINSCI & TECH DEV CO LTD
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