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Ultrafine-denier polyester fiber low-stretch yarn and preparation method thereof

A technology of ultrafine denier polyester and low elastic yarn, which is applied in the field of modified polyester fiber, which can solve the problems of slow natural degradation rate and poor dyeing performance of ultrafine denier polyester low elastic yarn, so as to improve the dyeing rate and dyeing efficiency. Performance, the effect of increasing the free volume of the cavity

Active Publication Date: 2019-04-23
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the defects of poor dyeing performance and slow natural degradation rate of ultrafine denier polyester low elastic yarn in the prior art, and provide a kind of ultrafine denier polyester low elastic yarn with good dyeing performance and fast natural degradation rate and its preparation method

Method used

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  • Ultrafine-denier polyester fiber low-stretch yarn and preparation method thereof
  • Ultrafine-denier polyester fiber low-stretch yarn and preparation method thereof
  • Ultrafine-denier polyester fiber low-stretch yarn and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0062] The preparation method of ultra-fine denier polyester low elastic yarn, the steps are as follows:

[0063] (1) prepare modified polyester;

[0064] (1.1) prepare MgO powder;

[0065] First heat MgO to 400°C and keep it warm for 2 hours, then raise the temperature to 700°C and keep it warm for 1 hour, then cool it in the air, and finally pulverize it to obtain MgO powder with an average particle size of 0.49 microns;

[0066] (1.2) Synthesis of 2,5,6,6-tetramethyl-2,5-heptanediol;

[0067] (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;

[0068] (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 duri...

Embodiment 2

[0083] The preparation method of ultra-fine denier polyester low elastic yarn, the steps are as follows:

[0084] (1) prepare modified polyester;

[0085] (1.1) Preparation of 2-tert-butyl-1,6-hexanedicarboxylic acid;

[0086] First, mix tungstic acid and hydrogen peroxide, stir at room temperature for 10 minutes, then add 2-tert-butylcyclohexanol and react at 80°C for 1 hour, then raise the temperature to 94°C for 2 hours. During the reaction, the reactants are always It is in a reflux state, and finally undergoes cooling crystallization, washing and refining, wherein at the beginning of the reaction, the molar ratio of tungstic acid, 2-tert-butylcyclohexanol and hydrogen peroxide is 1:35:120;

[0087] (1.2) Preparation of 2,5,6,6-tetramethyl-2,5-heptanediol;

[0088] (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 crystalli...

Embodiment 3

[0101] The preparation method of ultra-fine denier polyester low elastic yarn, the steps are as follows:

[0102] (1) prepare modified polyester;

[0103] (1.1) Preparation of 2-tert-butyl-1,6-hexanedicarboxylic acid;

[0104] First, mix tungstic acid and hydrogen peroxide, stir at room temperature for 12 minutes, then add 2-tert-butylcyclohexanol and react at 83°C for 1.5h, then raise the temperature to 90°C for 2h. During the reaction, the reactants Always in a reflux state, and finally carry out cooling crystallization, washing and refining, wherein at the beginning of the reaction, the molar ratio of tungstic acid, 2-tert-butylcyclohexanol and hydrogen peroxide is 1:33:120;

[0105] (1.2) Preparation of 2,5,6,6-tetramethyl-2,5-heptanediol;

[0106] (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 comple...

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Abstract

The invention relates to ultrafine-denier polyester fiber low-stretch yarn and a preparation method thereof. The preparation method comprises the steps: preparing modified polyester POY (Pre-OrientedYarn) from modified polyester melt by a POY process, and preparing modified polyester DTY (Draw Textured Yarn) from the modified polyester POY by a DTY process, thereby obtaining the ultrafine-denierpolyester fiber low-stretch yarn, wherein a molecular chain of modified polyester comprises a terephthalic acid chain segment, an ethylene glycol chain segment, a tert-butyl side group containing diacid chain segment and a 2,5,6,6-tetramethyl-2,5-heptandiol chain segment; solid base catalyst powder subjected to high-temperature roasting is dispersed in the modified polyester. Characteristic viscosity of the prepared product is lowered by 13% to 20% after the prepared product is placed for 60 months under the condition that the temperature is 25 DEG C and the relative humidity is 65%; the dye uptake is 86.3% to 91.5% at the temperature of 123 DEG C. The preparation method disclosed by the invention is simple in process and low in cost; the prepared product is excellent in dyeing behavior, 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 superfine denier polyester low elastic yarn and a preparation method thereof. Background technique [0002] Fine denier and ultra-fine denier fibers are a kind of differentiated fiber that has developed very rapidly in recent years. They are a high-quality and high-tech textile raw material and a typical representative of the development of chemical fibers in the direction of high-tech and high-simulation. Regarding the definition of fine denier and ultra-fine denier fiber, there is still no uniform standard accepted by the industry, and most manufacturers use single filament denier as the standard. In my country, fine denier fibers are defined as fibers with a single-filament fineness <1.2dtex, and ultra-fine denier fibers are defined as fibers with a single-filament fineness <0.56dtex. Ultrafine denier fiber has the characteristics of good softness, lar...

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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IPC IPC(8): D01F8/14D01F1/10C08G63/183C08G63/78D01D5/08D01D5/088D01D5/16
CPCC08G63/183C08G63/78D01D5/08D01D5/088D01D5/16D01F1/10D01F8/14
Inventor 杨超明陈瑞汤方明
Owner JIANGSU HENGLI CHEM FIBER
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