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Wool-like polyester filament and its preparation method

A polyester filament and wool-like technology, applied in the field of polyester fibers, can solve the problems of high dyeing cost, high equipment requirements, poor dyeing performance, etc. Effect

Active Publication Date: 2020-05-22
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 its preparation method
  • Wool-like polyester filament and its preparation method
  • Wool-like polyester filament and its preparation method

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. First, terephthalic acid, 1,4-butanediol, fluorine-containing dibasic acid, hexanediol with tert-butyl side group and 2, After 5,6,6-tetramethyl-2,5-heptanediol is mixed evenly, esterification reaction and polycondensation reaction are carried out successively to obtain modified polyester, and then modified polyester is prepared from modified polyester melt according to POY process. Ester POY yarn, and finally modified polyester DTY yarn is obtained from modified polyester POY yarn according to DTY process, that is, wool-like polyester filament is obtained. The dyeing rate of the prepared product under the temperature condition of 100°C was 90.32-93.27%, and the K / S value was 22.15-23.42; after being placed under the condition of temperature of 25°C and relative humidity of 65% for 60 months, its The intrinsic viscosity decreased by 17-20%. The preparation method of the invention has the advantages of low cost and simple process; the prepared product has excellent dyeing performance, fast natural degradation rate and great application prospect.

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 Patents(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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