Preparation method of low stretch yarn with differential finenesses and dyeing rates

A technology for low elastic yarn and dye uptake of polyester, applied in the field of polyester fiber, can solve the problems of poor dyeing performance, long dyeing time and high equipment requirements of polyester fiber, so as to improve dye uptake, improve dyeing effect and reduce dyeing temperature 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

The high temperature and high pressure dyeing method requires high equipment, long dyeing time, high en...

Method used

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  • Preparation method of low stretch yarn with differential finenesses and dyeing rates
  • Preparation method of low stretch yarn with differential finenesses and dyeing rates
  • Preparation method of low stretch yarn with differential finenesses and dyeing rates

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] The preparation method of polyester low stretch yarn with different fineness and different dyeing rate, the steps are as follows:

[0064] (1) prepare modified polyester;

[0065] (1.1) Synthesis of 2,2,5,5-tetramethyl-3,4-hexanediol, the method is as follows: first, the molar ratio of 2,2-methylpropanal and sulfuric acid is 1.5:1 2,2-Methylpropionaldehyde solution with a concentration of 320g / L and dilute sulfuric acid solution with a concentration of 200g / L are mixed and added to the cathodic electrolytic cell, and then the mixed solution is cooled to 12°C, followed by electrolytic reduction to 2,2 -The concentration of methapropanal is 9.5wt%, and finally cooling crystallization, separation and purification are carried out, and the schematic diagram of the reaction device adopted in the synthesis process is as follows figure 1 As shown, the reaction chemical equation is as follows:

[0066]

[0067] The structural formula of the prepared 2,2,5,5-tetramethyl-3,4-he...

Embodiment 2

[0088] The preparation method of polyester low stretch yarn with different fineness and different dyeing rate, the steps are as follows:

[0089] (1) prepare modified polyester;

[0090] (1.1) Synthetic 2,2,5,5-tetramethyl-3,4-diethyl-3,4-hexanediol, the method is: at first, press 2,2-dimethyl 3-pentanone and The molar ratio of sulfuric acid is that the ratio of 1.6:1 concentration is that the 2,2-dimethyl 3-pentanone solution of 350g / L and the dilute sulfuric acid solution of 210g / L are mixed and added in the cathodic electrolytic cell, then, the mixed Liquid cooling to 11 ° C, followed by electrolytic reduction to a concentration of 9.0 wt% of 2,2-dimethyl-3-pentanone, and finally cooling crystallization, separation and purification, the reaction device used in the synthesis process and the reaction chemical equation Consistent with Example 1, the structural formula of the prepared 2,2,5,5-tetramethyl-3,4-diethyl-3,4-hexanediol is shown in formula (I), where R for -CH 2 C...

Embodiment 3

[0103] The preparation method of polyester low stretch yarn with different fineness and different dyeing rate, the steps are as follows:

[0104] (1) prepare modified polyester;

[0105] (1.1) Synthesis of 2,2,4,4-tetramethyl-3,4-di-tert-butyl-3,4-hexanediol, the method is: first, according to 2,24,4-tetramethyl 3- The molar ratio of pentanone to sulfuric acid is 1.7:1. Mix the 2,24,4-tetramethyl-3-pentanone solution with a concentration of 340g / L and the dilute sulfuric acid solution with a concentration of 230g / L into the cathode electrolytic cell , and then, the mixed solution was cooled to 10°C, followed by electrolytic reduction to a concentration of 9.6 wt% of 2,24,4-tetramethyl-3-pentanone, and finally cooled crystallization, separation and purification, using the The reaction device and reaction chemical equation are consistent with embodiment 1, and the structural formula of the 2,2,4,4-tetramethyl-3,4-di-tert-butyl-3,4-hexanediol that makes is as formula (Ⅰ ), wher...

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Abstract

The invention relates to a preparation method of a low stretch yarn with differential finenesses and dyeing rates. The preparation method comprises the following steps: uniformly mixing terephthalic acid, glycol and hexanediol with a tertiary butyl lateral group, sequentially carrying out esterification reaction and condensation polymerization reaction so as to obtain modified polyester, doublingtwo modified polyester POY yarns with different monofilament finenesses, processing by virtue of a DTY process, setting a ditch breaking roller and a variable-frequency yarn mover between a zero roller and a first roller of DTY equipment, enabling a modified polyester yarn to move through the surface of the ditch breaking roller so as to prepare the low stretch yarn with differential finenesses and dyeing rates, wherein a plurality of annular grooves are formed in the circumference of the ditch breaking roller, the variable-frequency yarn mover is used for driving the polyester POY yarns to doa reciprocating motion along the central shaft of the roller, and the moving period of the variable-frequency yarn mover is 5-99 reciprocating numbers of times per minute. The preparation method is reasonable in operation, and the prepared low stretch yarn has good dyeing performance.

Description

technical field [0001] The invention belongs to the technical field of polyester fibers, and relates to a preparation method of polyester low elastic yarn with different fineness and different dye uptake. Background technique [0002] Polyester is the trade name of polyester fiber in my country, and it is an important variety in synthetic fibers. With the continuous improvement of human living standards, the requirements for the quantity and quality of fiber materials in terms of clothing, decoration and industrial use are also increasing. In order to meet people's needs in clothing, decoration, industry and special fields, it is necessary to develop differentiated fibers with new properties or added value. The softness of textile materials is mostly characterized by comfortable touch, smooth surface and low bending resistance, and the stiffness is mostly manifested in the advantages of good touch elasticity and recovery performance and high bending resistance. The basic s...

Claims

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Application Information

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IPC IPC(8): D02G3/34D02G1/20D01H5/36D01H5/78C08G63/183D01F6/84
Inventor 马文平周文龙杨超明
Owner JIANGSU HENGLI CHEM FIBER
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