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Full-dull network stretch yarn and preparation method thereof

A full extinction and network technology, applied in the field of modified polyester fibers, can solve the problems of long natural degradation time and limit the application of chemical degradation and recycling, and achieve the effect of increasing the natural degradation rate, increasing the free volume of voids, and strong nucleophilic ability

Active Publication Date: 2019-05-14
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the compact structure and high crystallinity of PET, the natural degradation time is very long (the degradation cycle of conventional polyester fibers can reach 16-48 years), which greatly limits the application of chemical degradation and recycling in the field of PET waste treatment.

Method used

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  • Full-dull network stretch yarn and preparation method thereof
  • Full-dull network stretch yarn and preparation method thereof
  • Full-dull network stretch yarn and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] The preparation method of full-dull network elastic yarn, the steps are as follows:

[0060] (1) prepare modified polyester;

[0061] (1.1) Synthesis of 2,5,6,6-tetramethyl-2,5-heptanediol;

[0062] (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;

[0063] (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);

[0064] (1.2) prepare MgO powder;

[0065] First heat MgO to 400°C and keep it warm for 2 hours, th...

Embodiment 2

[0082] The preparation method of full-dull network elastic yarn, the steps are as follows:

[0083] (1) prepare modified polyester;

[0084] (1.1) Preparation of 2,5,6,6-tetramethyl-2,5-heptanediol;

[0085] (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;

[0086] (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);

[0087] (1.2) prepare BaO powder;

[0088] First heat BaO to 400°C and keep it warm for 3 hours...

Embodiment 3

[0100] The preparation method of full-dull network elastic yarn, the steps are as follows:

[0101] (1) prepare modified polyester;

[0102] (1.1) Preparation of 2,5,6,6-tetramethyl-2,5-heptanediol;

[0103] (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;

[0104] (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);

[0105] (1.2) Preparation of SiO 2 - BaO powder;

[0106] First heat the SiO 2 -BaO is...

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Abstract

The invention relates to full-dull network stretch yarn and a preparation method thereof. The preparation method comprises the steps that terephthalic acid, ethanediol, 2,5,6,6-tetramethyl-2,5-heptandiol, a dulling agent and solid alkali catalyst powder subjected to high-temperature roasting are evenly mixed, then an esterification reaction and a polycondensation reaction are conducted successively to prepare modified polyester, then modified polyester pre-oriented yarn (POY) is prepared from a modified polyester melt through a POY process, finally, modified polyester draw texturing yarn (DTY)is prepared from the modified POY through a DTY process, and thus the full-dull network stretch yarn is obtained; and the dulling agent and the solid alkali catalyst powder subjected to high-temperature roasting are dispersed into the modified polyester. After a prepared product is placed for 60 months under the conditions that the temperature is 25 DEG C and the relative humidity is 65%, the intrinsic viscosity is decreased by 13%-18%. The preparation method of the full-dull network stretch yarn is simple in process and low in cost; and the prepared product is high in natural degradation rate and good in application prospect.

Description

technical field [0001] The invention belongs to the technical field of modified polyester fibers, and relates to a full-dull network elastic yarn and a preparation method thereof. Background technique [0002] Since its inception, polyethylene terephthalate (PET) fiber has high breaking strength, high elastic modulus, moderate resilience, excellent heat setting, good heat resistance and light resistance, acid resistance, alkali resistance, corrosion resistance, etc. A series of excellent properties, and the prepared fabric has the advantages of anti-wrinkle, non-ironing, good crispness, etc., and is widely used in clothing and home textiles and other fields. [0003] Due to the regular shape, smooth surface and certain transparency of conventional polyester, under the irradiation of light, the intensity of reflected light is very high, with obvious reflection and flickering phenomenon, and the visual comfort of the fiber is not high. Adding a small amount of substances with...

Claims

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Application Information

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IPC IPC(8): D01F6/92D01F1/10C08G63/183D01D5/08D02G1/02
Inventor 汤方明马文平杨超明
Owner JIANGSU HENGLI CHEM FIBER
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