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Wool-like polyester filament and preparation method thereof

A polyester filament and wool-like technology, applied in the field of polyester fibers, can solve the problems of high equipment requirements, poor dyeing performance, and high dyeing cost, and achieve the effects of reducing dyeing temperature, increasing the free volume of voids, and facilitating penetration.

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

[0007] The purpose of the present invention is to overcome the defects of poor dyeing performance, high requirements on equipment, high dyeing cost and slow degradation rate in the prior art, and provide a dyeing product with excellent dyeing performance, low requirements on dyeing equipment, low dyeing cost and fast natural degradation rate. Wool-like polyester filament and preparation method thereof

Method used

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  • Wool-like polyester filament and preparation method thereof
  • Wool-like polyester filament and preparation method thereof
  • Wool-like polyester filament and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] The preparation method of wool-like polyester filament, the steps are as follows:

[0070] (1) prepare modified polyester;

[0071] (1.1) Preparation of 2,2,5,5-tetramethyl-3,4-hexanediol;

[0072] First, mix 2,2-methylpropanal solution with a concentration of 320g / L and dilute sulfuric acid solution with a concentration of 200g / L according to the ratio of 2,2-methylpropanal to sulfuric acid molar ratio of 1.5:1 In the cathodic electrolytic cell, then, the mixed solution is cooled to 12°C, followed by electrolytic reduction to a concentration of 9.5wt% of 2,2-methylpropanal, and finally cooled crystallization, separation and purification, the method used in the synthesis process The schematic diagram of the reaction apparatus is as figure 1 As shown, the reaction chemical equation is as follows:

[0073]

[0074] The structural formula of the prepared 2,2,5,5-tetramethyl-3,4-hexanediol is shown in formula (I), where R is -H;

[0075] (1.2) Preparation of 2,5,6,6-...

Embodiment 2

[0101] The preparation method of wool-like polyester filament, the steps are as follows:

[0102] (1) prepare modified polyester;

[0103] (1.1) Preparation of 2,2,5,5-tetramethyl-3,4-diethyl-3,4-hexanediol;

[0104] First, the molar ratio of 2,2-dimethyl 3-pentanone to sulfuric acid is 1.6:1, the concentration is 350g / L of 2,2-dimethyl 3-pentanone solution and the concentration is 210g / L The dilute sulfuric acid solution is mixed and added to the cathodic electrolytic cell, and then the mixed solution is cooled to 11°C, followed by electrolytic reduction to a concentration of 9.0wt% of 2,2-dimethyl-3-pentanone, and finally cooling crystallization and separation and purification, the reaction device adopted in the synthesis process and the reaction chemical equation are consistent with embodiment 1, and the obtained 2,2,5,5-tetramethyl-3,4-diethyl-3,4-hexanedi The structural formula of alcohol is shown in formula (I), in the formula, R is -CH 2 CH 3 ;

[0105] (1.2) Prepa...

Embodiment 3

[0120] The preparation method of wool-like polyester filament, the steps are as follows:

[0121] (1) prepare modified polyester;

[0122] (1.1) Preparation of 2,2,4,4-tetramethyl-3,4-di-tert-butyl-3,4-hexanediol;

[0123] Firstly, the molar ratio of 2,24,4-tetramethyl-3-pentanone to sulfuric acid is 1.7:1, the concentration is 340g / L 2,24,4-tetramethyl-3-pentanone solution and concentration A dilute sulfuric acid solution of 230g / L was mixed and added to the cathodic electrolytic cell, then the mixed solution was cooled to 10°C, followed by electrolytic reduction to a concentration of 9.6wt% of 2,24,4-tetramethyl-3-pentanone, Finally, cooling crystallization, separation and purification are carried out. The reaction device and reaction chemical equation used in the synthesis process are consistent with those in Example 1. The obtained 2,2,4,4-tetramethyl-3,4-di-tert-butyl The structural formula of -3,4-hexanediol is shown in formula (I), where R is -C(CH 3 ) 3 ;

[0124]...

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Abstract

The invention relates to a wool-like polyester filament and a preparation method thereof. The preparation method comprises the steps: firstly, terephthalic acid, 1,4-butanediol, fluorinated diacid, hexanediol with tertiary butyl side groups, and 2,5,6,6-tetramethyl-2,5-heptanediol are evenly mixed, and then an esterification reaction and a polycondensation reaction are carried out successively toprepare modified polyester; then a modified polyester POY filament is prepared from modified polyester flux according to a POY process; and finally a modified polyester DTY filament is prepared from the modified polyester POY filament according to a DTY process, and then the wool-like polyester filament is obtained. According to a prepared product, when the temperature is 100 DEG C, the dye-uptakeis 90.32-93.27%, and the K / S value is 22.15-23.42; after the product is placed at temperature of 25 DEG C and the relative humidity of 65% for 60 months, the intrinsic viscosity of the product is lowered by 17-20%; and the preparation method is low in cost and simple in process, and the prepared product is excellent in dyeing property and high in natural degradation speed, and has great application prospects.

Description

technical field [0001] The invention belongs to the technical field of polyester fibers, relates to a wool-like polyester filament and a preparation method thereof, in particular to a method for preparing a wool-like polyester filament by modifying PBT. Background technique [0002] Because PBT filament has the characteristics of excellent elasticity, soft hand feeling, easy dyeing, anti-wrinkle, anti-moth, anti-mold, heat-resistant and washable, and easy to curl delicately, etc., it has a good application prospect and is currently attracting more and more attention from the textile industry. In recent years, with the continuous improvement of human living standards, people's requirements for the quantity and quality of fiber materials are also increasing in the application fields of clothing, decoration and industrial polyester products. In order to meet the needs of people in the fields of clothing and decoration, it is necessary to develop differentiated fibers with new p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/92D01F1/10C08G63/682
CPCC08K3/22C08K5/521C08K5/524D01F6/84D01D5/16C08G63/6826C08G63/85C08L67/02C08K3/38C08K13/02C08K2003/2241D01F6/92
Inventor 王山水王丽丽沈建根
Owner JIANGSU HENGLI CHEM FIBER
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