Super-bright polyester drawn yarn and preparation method thereof

A polyester drawn yarn, bright technology, applied in filament/thread forming, textile and papermaking, fiber processing, etc., can solve the problems of increasing process complexity, high production cost, increasing the difficulty of dyeing polyester fibers, etc.

Active Publication Date: 2019-04-16
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 usually 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 dyeing performance. Difference

Method used

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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  • Super-bright polyester drawn yarn and preparation method thereof
  • Super-bright polyester drawn yarn and preparation method thereof
  • Super-bright polyester drawn yarn and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] The preparation method of super bright polyester drawing yarn, the steps are as follows:

[0063] (1) prepare modified polyester;

[0064] (1.1) Preparation of 2,2,3,4,5,5-hexamethyl-3,4-hexanediol;

[0065] After mixing palladium acetate and dimethyl di-tert-butylethylene evenly, add a hydrogen peroxide solution with a mass concentration of 10%, react at a temperature of 72°C for 3 hours, and obtain 2,2,3, 4,5,5-hexamethyl-3,4-hexanediol, wherein the mass ratio of dimethyl di-tert-butylethylene, hydrogen peroxide solution and palladium acetate is 1:2.0:0.015, 2,2,3,4 , the structural formula of 5,5-hexamethyl-3,4-hexanediol is shown in formula (I);

[0066] (1.2) Preparation of 2,6,6-trimethyl-2,5 heptanediol;

[0067] (a) Mix potassium hydroxide aqueous solution and isobutanol at a ratio of 5:1 in a molar ratio of isobutanol to potassium hydroxide, and react for 4 hours at a temperature of 100° C. to obtain potassium isobutoxide. During the reaction, With stirring...

Embodiment 2

[0085] The preparation method of super bright polyester drawing yarn, the steps are as follows:

[0086] (1) prepare modified polyester;

[0087] (1.1) Preparation of 2,2,3,4,5,5-hexamethyl-3,4-hexanediol;

[0088] After mixing palladium acetate and dimethyl di-tert-butylethylene evenly, add hydrogen peroxide solution with a mass concentration of 11%, react at a temperature of 70°C for 4 hours, and obtain 2,2,3, 4,5,5-hexamethyl-3,4-hexanediol, wherein the mass ratio of dimethyl di-tert-butylethylene, hydrogen peroxide solution and palladium acetate is 1:1.8:0.015, 2,2,3,4 , the structural formula of 5,5-hexamethyl-3,4-hexanediol is shown in formula (I);

[0089] (1.2) Preparation of 2,6,6-trimethyl-2,5 heptanediol;

[0090] (a) Mix potassium hydroxide aqueous solution and isobutanol at a ratio of 5.5:1 in a molar ratio of isobutanol to potassium hydroxide, and react for 5 hours at a temperature of 100° C. to prepare potassium isobutoxide. During the reaction, With stirrin...

Embodiment 3

[0105] The preparation method of super bright polyester drawing yarn, the steps are as follows:

[0106] (1) prepare modified polyester;

[0107] (1.1) Preparation of 2,2,3,4,5,5-hexamethyl-3,4-hexanediol;

[0108] After mixing palladium acetate and dimethyl di-tert-butylethylene evenly, add a hydrogen peroxide solution with a mass concentration of 12%, react at a temperature of 74°C for 4 hours, and obtain 2,2,3, 4,5,5-hexamethyl-3,4-hexanediol, wherein the mass ratio of dimethyl di-tert-butylethylene, hydrogen peroxide solution and palladium acetate is 1:1.6:0.015, 2,2,3,4 , the structural formula of 5,5-hexamethyl-3,4-hexanediol is shown in formula (I);

[0109] (1.2) Preparation of 2,6,6-trimethyl-5-ethyl-2,5-heptanediol;

[0110] (a) Mix potassium hydroxide aqueous solution and isobutanol according to the ratio of isobutanol to potassium hydroxide molar ratio of 5:1, and react at a temperature of 105°C for 4.5h to obtain potassium isobutoxide. During the reaction Acco...

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Abstract

The invention relates to super-bright polyester drawn yarn and a preparation method thereof. The preparation method includes the step that a modified polyester melt is prepared into modified polyesterFDY yarn through an FDY technology by using a triangular or a straight-line-shaped spinneret plate to obtain the super-bright polyester drawn yarn. Modified polyester is prepared in the steps that terephthalic acid, ethylene glycol, 2,2,3,4,5,5-hexamethyl-3,4-hexanediol, heptanediol with tert-butyl side groups, dihydric alcohol with a main chain containing silicon and binary acid with tert-butylside groups are evenly mixed and subjected to an esterification reaction and a polycondensation reaction in sequence. Under the temperature condition of 125 DEG C, the dye uptake of the prepared product is 89.3-92.2%, the K / S value is 22.55-24.36, the fastness to soaping reaches the fifth level, the fastness to dry rubbing reaches the fifth level, and the fastness to wet rubbing is higher than thefourth level. The preparation method is simple in process, and the prepared product is good in dyeing performance and high in application prospect.

Description

technical field [0001] The invention belongs to the technical field of fiber preparation, and relates to a super bright polyester drawn yarn and a preparation method thereof. Background technique [0002] Polyester (that is, PET fiber) is the trade name of polyester fiber in my country and is an important variety in synthetic fibers. With the expansion of polyester production scale, the production technology has also been greatly improved. From the initial production of conventional products, it gradually develops towards the production direction of high-tech, functional and differentiated fibers. The production of differentiated fiber products mainly There are two ways: one is to use new monomers or synthetic methods to manufacture new polymers, and the other is to modify existing fibers to obtain new properties, and the latter method has investment The main technologies of this method include polymer modification technology, ultrafine fiber manufacturing technology, speci...

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): D01D5/253C08G63/695C08G63/78
CPCC08G63/6956C08G63/78D01D5/253
Inventor 王丽丽钮臧臧张元华
Owner JIANGSU HENGLI CHEM FIBER
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