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Complete extinction dacron low stretch yarns and preparation method thereof

A technology of full-dull polyester and low elastic yarn, which is applied in the field of modified polyester fiber, can solve the problems of environmental pollution, time-consuming and labor-consuming, and low processing efficiency, and achieve the goal of increasing hydrolysis rate, degradation rate, and conductivity rate Effect

Active Publication Date: 2019-05-10
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although landfill and incineration are simple and quick, they will cause certain pollution to the environment
Recycling PET waste after degradation is the most scientific way to deal with PET waste, but the proportion of recycling is still very small at present. This is because most of the clothing is made of cotton polyester or wool polyester blends. On the one hand, it requires a large labor cost. Polyester fibers are separated. On the other hand, PET has a dense structure and high crystallinity, and its natural degradation time is long, which is time-consuming and labor-intensive.
At present, the mainstream PET degradation methods include hydrolysis, alcoholysis, ammonolysis, aminolysis and pyrolysis, etc., but due to the special structure of PET, its processing efficiency is low, and the rapid degradation of PET cannot be achieved, which greatly limits the recovery of PET. use

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Complete extinction dacron low stretch yarns and preparation method thereof
  • Complete extinction dacron low stretch yarns and preparation method thereof
  • Complete extinction dacron low stretch yarns and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0096] A kind of preparation method of all-dull polyester low elastic yarn, the steps are as follows:

[0097] (1) prepare modified polyester;

[0098] (1.1) Preparation of 2,5,6,6-tetramethyl-2,5-heptanediol;

[0099] (a) Mix KOH powder, 3-methyl-3-hydroxybutyne, 3,3-dimethyl-2-butanone and isopropyl ether at a molar ratio of 1:1:1.2:2.0, and place in an ice bath Under the conditions of reaction for 2h, cooling crystallization, centrifugation, washing, refining and drying are carried out after the reaction to obtain octyne diol;

[0100] (b) Mix octynediol, ethanol and palladium catalyst in a weight ratio of 2:10:0.01, react at a temperature of 40°C for 50 minutes, continuously feed hydrogen during the reaction, and separate and purify after the reaction to obtain 2,5,6,6-tetramethyl-2,5-heptanediol, the structural formula of 2,5,6,6-tetramethyl-2,5-heptanediol is shown in formula (I);

[0101] (1.2) Synthesis of 2,2,3,4,5,5-hexamethyl-3,4-hexanediol, the method is: after ...

Embodiment 2

[0122] A kind of preparation method of all-dull polyester low elastic yarn, the steps are as follows:

[0123] (1) prepare modified polyester;

[0124] (1.1) Preparation of 2,5,6,6-tetramethyl-2,5-heptanediol;

[0125] (a) Mix KOH powder, 3-methyl-3-hydroxybutyne, 3,3-dimethyl-2-butanone and isopropyl ether at a molar ratio of 1.1:1:1.2:2.3, and place in an ice bath Under the conditions of reaction for 2h, cooling crystallization, centrifugation, washing, refining and drying are carried out after the reaction to obtain octyne diol;

[0126] (b) Mix octynediol, ethanol and palladium catalyst in a weight ratio of 2:10:0.01, react at a temperature of 45°C for 50 minutes, continuously feed hydrogen during the reaction, and separate and purify after the reaction to obtain 2,5,6,6-tetramethyl-2,5-heptanediol, the structural formula of 2,5,6,6-tetramethyl-2,5-heptanediol is shown in formula (I);

[0127] (1.2) Synthesis of 2,2,3,4,5,5-hexamethyl-3,4-hexanediol, the method is: afte...

Embodiment 3

[0144] A kind of preparation method of all-dull polyester low elastic yarn, the steps are as follows:

[0145] (1) prepare modified polyester;

[0146] (1.1) Preparation of 2,5,6,6-tetramethyl-2,5-heptanediol;

[0147] (a) Mix KOH powder, 3-methyl-3-hydroxybutyne, 3,3-dimethyl-2-butanone and isopropyl ether at a molar ratio of 1.2:1:1.25:2.0, and place in an ice bath Under the conditions of reaction for 3 hours, after the reaction is completed, cooling and crystallization, centrifugation, washing, refining and drying are carried out to obtain octyne diol;

[0148] (b) Mix octynediol, ethanol and palladium catalyst in a weight ratio of 3:10:0.03, react at 40°C for 50 minutes, continuously feed hydrogen during the reaction, and separate and purify after the reaction to obtain 2,5,6,6-tetramethyl-2,5-heptanediol, the structural formula of 2,5,6,6-tetramethyl-2,5-heptanediol is shown in formula (I);

[0149] (1.2) Synthesis of 2,2,3,4,5,5-hexamethyl-3,4-hexanediol, the method i...

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Abstract

The invention relates to complete extinction dacron low stretch yarns and a preparation method thereof. The preparation method comprises the following steps: preparing modified polyester POY yarns from a modified polyester melt according to a POY process; and then preparing modified polyester DTY yarns from the modified polyester POY yarns according to a DTY process to obtain the complete extinction dacron low stretch yarns. A 2,5,6,6-tetramethyl-2,5-heptandiol chain segment, a fluorine-containing binary acid chain segment and a 2,2,3,4,5,5-hexamethyl-3,4-hexamethyl chain segment are introduced in molecular chains of the modified polyester, and an extinction agent, solid heteropolyacid powder roasted at a high temperature and doped and modified ZrO2 powder are dispersed in the modified polyester. The content of the extinction agent is greater than or equal to 2.0 wt%. The dye-uptake, the K / S value, the color fastness and the natural degrading efficiency of the prepared complete extinction dacron low stretch yarns are high. The method is simple in process, and the prepared complete extinction dacron low stretch yarns is good in dyeing performance and high in natural degrading efficiency.

Description

technical field [0001] The invention belongs to the technical field of modified polyester fibers, and relates to a full-dull polyester low elastic yarn and a preparation method thereof. Background technique [0002] Polyethylene terephthalate fiber (PET fiber) has a series of excellent properties such as high breaking strength and elastic modulus, moderate resilience, excellent heat setting, good heat resistance and light resistance, acid resistance, alkali resistance and corrosion resistance, and The fabric has the advantages of anti-wrinkle and good stiffness, and is widely used in clothing, home textiles and other fields. At this stage, polyester fiber matting products mainly include bright, semi-dull and full-dull products. TiO 2 Applied in textiles, it can have the advantages of antistatic, anti-ultraviolet, antibacterial, extinction, infrared absorption, anti-aging and self-cleaning. Fiber grade titanium dioxide is a white powder, which is insoluble in water, non-ph...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/92D01F1/10C08G63/682C08G63/86
Inventor 汤方明周文龙张元华
Owner JIANGSU HENGLI CHEM FIBER
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