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Ultra-bright polyester filament yarn for cross-stitch embroidery and preparation method of ultra-bright polyester filament yarn

A polyester filament and cross stitch technology, applied in the field of modified polyester fibers, can solve the problems of increased process complexity, high equipment requirements, lack of active groups, etc., to shorten the dyeing time, reduce dyeing temperature, and improve dyeing. performance effect

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

[0004] However, since polyester is a hydrophobic fiber, its molecules do not contain hydrophilic groups, and its molecular structure also lacks active groups that can combine with dyes, the dyeing performance of polyester fibers is not good.
In addition, the finished polyester fiber has a partially crystalline supramolecular structure, and its crystalline molecular chains are parallel to each other, mostly in a trans conformation, while the amorphous region is mostly in a cis conformation, and its molecules are arranged quite closely, which further increases the Dyeing Difficulty of Polyester Fiber
Conventional PET fibers are generally dyed with disperse dyes, which usually need to be dyed under high temperature (greater than 130°C) and high pressure. In addition to increasing the complexity of the process, this method has high requirements for equipment, high production costs, and poor dyeing performance.

Method used

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  • Ultra-bright polyester filament yarn for cross-stitch embroidery and preparation method of ultra-bright polyester filament yarn
  • Ultra-bright polyester filament yarn for cross-stitch embroidery and preparation method of ultra-bright polyester filament yarn
  • Ultra-bright polyester filament yarn for cross-stitch embroidery and preparation method of ultra-bright polyester filament yarn

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] The preparation method of super bright polyester filament for cross-stitching, the steps are as follows:

[0068] (1) prepare modified polyester;

[0069] (1.1) Preparation of 2,2,5,5-tetramethyl-3,4-hexanediol;

[0070] 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:

[0071]

[0072] The structural formula of the prepared 2,2,5,5-tetramethyl-3,4-hexanediol is shown in formula (I), where R is -H;

[0073] (1.2) ...

Embodiment 2

[0091] The preparation method of super bright polyester filament for cross-stitching, the steps are as follows:

[0092] (1) prepare modified polyester;

[0093] (1.1) Preparation of 2-tert-butyl-1,6-hexanedicarboxylic acid;

[0094] 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;

[0095] (1.2) Preparation of 2,2,5,5-tetramethyl-3,4-diethyl-3,4-hexanediol;

[0096] 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 sulf...

Embodiment 3

[0109] The preparation method of super bright polyester filament for cross-stitching, the steps are as follows:

[0110] (1) prepare modified polyester;

[0111] (1.1) Preparation of 2-tert-butyl-1,6-hexanedicarboxylic acid;

[0112] 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;

[0113] (1.2) Preparation of 2,2,4,4-tetramethyl-3,4-di-tert-butyl-3,4-hexanediol;

[0114] 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 soluti...

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Abstract

The invention relates to ultra-bright polyester filament yarn for cross-stitch embroidery and a preparation method of the ultra-bright polyester filament yarn. The preparation method comprises the step that modified polyester fully drawn yarn (FDY), namely the ultra-bright polyester filament yarn for the cross-stitch embroidery, is prepared from a modified polyester melt according to an FDY process through a triangular or linear spinneret plate,; and a preparation method of modified polyester comprises the steps that terephthalic acid, ethanediol, dibasic acid with a tertiary butyl side group,hexanediol with a tertiary butyl side group and 2,5,6,6-tetramethyl-2,5-heptandiol are evenly mixed, and then an esterification reaction and a polycondensation reaction are conducted successively. The dye-uptake of the prepared ultra-bright polyester filament yarn for the cross-stitch embroidery at the temperature of 123 DEG C is 86.3-89.2%, the K / S value is 21.15-24.6, the soaping-resistant color fastness reaches the fifth level, the dry friction fastness reaches the fifth level, and the wet friction fastness reaches the fourth level. The preparation method is simple in process, and the prepared ultra-bright polyester filament yarn for the cross-stitch embroidery is good in dyeing performance.

Description

technical field [0001] The invention belongs to the technical field of modified polyester fibers, and relates to a super bright polyester filament for cross-stitching and a preparation method thereof. Background technique [0002] Since its invention, polyester fiber has achieved rapid development because of its luster, strength and elasticity comparable to silk and good alkali resistance. It is an ideal textile material today. With the level of social and economic development and the provision of people's living standards, people's demand for high-grade and comfortable clothing fabrics is becoming more and more urgent. Because of its characteristics of comfort and fashion, good gloss and good hand feeling, glossy polyester, Its market demand is increasing. Ultra-bright special-shaped polyester fully drawn yarn (FDY) is widely used in the preparation of jet-woven satin, taffeta, flash satin, two-for-one twisted silk, warp knitting, knitted velvet and webbing and other fabri...

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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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/92D01F1/10C08G63/183C08G63/86D01D5/253D01D5/098
Inventor 王山水王永锋汤方明
Owner JIANGSU HENGLI CHEM FIBER
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