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Hollow polyester filament yarn and preparation method thereof

A polyester filament and hollow technology, which is applied in the field of polyester fiber, can solve the problems of lack of active groups, increase process complexity, and high equipment requirements, so as to increase the free volume of the cavity, shorten the dyeing time, and lower the dyeing temperature Effect

Active Publication Date: 2019-03-26
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 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. , and for hollow polyester fibers, the fiber dyeing rate has a certain relationship with the size of the fiber cross-sectional area. Fast, high dyeing rate, which will lead to uneven dyeing, in practical applications, through the refraction and interference of light, it is easier for human eyes to distinguish uneven dyeing

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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  • Hollow polyester filament yarn and preparation method thereof
  • Hollow polyester filament yarn and preparation method thereof
  • Hollow polyester filament yarn and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The preparation method of hollow polyester filament, the steps are as follows:

[0046] (1) preparation of modified polyester;

[0047] (1.1) The synthesis steps of 2,5,6,6-tetramethyl-2,5-heptanediol are as follows:

[0048] (a) Mix KOH powder, 3-methyl-3-hydroxybutyne, 3,3-dimethyl-2-butanone and isopropyl ether at a molar ratio of 1:1:1.2:2.0, and place in an ice bath Under the conditions of reaction for 2h, cooling crystallization, centrifugation, washing, refining and drying are carried out after the reaction to obtain octyne diol;

[0049] (b) Mix octynediol, ethanol and palladium catalyst in a weight ratio of 2:10:0.01, react at a temperature of 40°C for 50 minutes, continuously feed hydrogen during the reaction, and separate and purify after the reaction to obtain 2,5,6,6-tetramethyl-2,5-heptanediol, the structural formula of 2,5,6,6-tetramethyl-2,5-heptanediol is shown in formula (I);

[0050] (1.2) Esterification reaction;

[0051] Prepare a slurry of tere...

Embodiment 2

[0066]The preparation method of hollow polyester filament, the steps are as follows:

[0067] (1) preparation of modified polyester;

[0068] (1.1) The synthesis steps of 2,5,6,6-tetramethyl-2,5-heptanediol are as follows:

[0069] (a) Mix KOH powder, 3-methyl-3-hydroxybutyne, 3,3-dimethyl-2-butanone and isopropyl ether at a molar ratio of 1.1:1:1.2:2.3, and place in an ice bath Under the conditions of reaction for 2h, cooling crystallization, centrifugation, washing, refining and drying are carried out after the reaction to obtain octyne diol;

[0070] (b) Mix octynediol, ethanol and palladium catalyst in a weight ratio of 2:10:0.01, react at a temperature of 45°C for 50 minutes, continuously feed hydrogen during the reaction, and separate and purify after the reaction to obtain 2,5,6,6-tetramethyl-2,5-heptanediol, the structural formula of 2,5,6,6-tetramethyl-2,5-heptanediol is shown in formula (I);

[0071] (1.2) Esterification reaction;

[0072] Prepare a slurry of ter...

Embodiment 3

[0079] The preparation method of hollow polyester filament, the steps are as follows:

[0080] (1) preparation of modified polyester;

[0081] (1.1) The synthesis steps of 2,5,6,6-tetramethyl-2,5-heptanediol are as follows:

[0082] (a) Mix KOH powder, 3-methyl-3-hydroxybutyne, 3,3-dimethyl-2-butanone and isopropyl ether at a molar ratio of 1.2:1:1.25:2.0, and place in an ice bath Under the conditions of reaction for 3 hours, after the reaction is completed, cooling and crystallization, centrifugation, washing, refining and drying are carried out to obtain octyne diol;

[0083] (b) Mix octynediol, ethanol and palladium catalyst in a weight ratio of 3:10:0.03, react at 40°C for 50 minutes, continuously feed hydrogen during the reaction, and separate and purify after the reaction to obtain 2,5,6,6-tetramethyl-2,5-heptanediol, the structural formula of 2,5,6,6-tetramethyl-2,5-heptanediol is shown in formula (I);

[0084] (1.2) Esterification reaction;

[0085] Prepare terepht...

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Abstract

The invention relates to hollow polyester filament yarn and a preparation method thereof. The preparation method comprises the steps that hollow modified polyester FDY yarn is produced from modified polyester melt according to an FDY technology by adopting a hollow spinneret plate, and thus the hollow polyester filament yarn is obtained. A preparation method of modified polyester comprises the steps that terephthalic acid, ethylene glycol and 2,5,6,6-tetramethyl-2,5-heptandiol are mixed uniformly and then subjected to esterification and polycondensation reactions in sequence. The dye-uptake ofthe prepared hollow polyester filament yarn at the temperature of 120 DEG C is 85.3-89.2%, the K / S value is 22.35-25.43, 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 the fourth level. The preparation method is simple, the cost is low, the dyeing temperature is lowered, the dyeing time is shortened and the dye-uptake is improved by introducing 2,5,6,6-tetramethyl-2,5-heptandiol to modify polyester. The prepared product has good dyeing property, and good mechanical property.

Description

technical field [0001] The invention belongs to the technical field of polyester fibers, and relates to a hollow polyester filament and a preparation method thereof. Background technique [0002] Polyester is the trade name of polyester fiber in my country, and it is an important variety of synthetic fibers. Hollow polyester fiber is called a new generation of synthetic fiber, which has the characteristics of warmth, lightness, breathability, close fit, comfort and softness. , and achieved results that are difficult to achieve with other fibers. Among the mainstream varieties developed with hollow polyester fibers at present, hollow polyester imitation silk knitted fabrics are the most eye-catching. It not only has the advantages of silk moisture absorption, breathability, and comfortable wearing, but also overcomes the shortcomings of silk fabrics such as wrinkle, stickiness, and poor fastness. Especially in the structure of knitted fabrics, it gives the fabric good extensi...

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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IPC IPC(8): D01F6/92D01F1/08C08G63/183C08G63/78
CPCC08G63/183C08G63/78D01F1/08D01F6/92
Inventor 陈瑞王雪张元华
Owner JIANGSU HENGLI CHEM FIBER
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