Viscose imitated polyester filament yarn and preparation method thereof

A polyester filament and viscose technology, applied in the field of polyester fibers, can solve the problems of poor thermal stability and spinnability, low accessibility of cationic dyes to sulfonic acid bases, etc., so as to improve the dyeing performance and shorten the dyeing time. time, the effect of increasing the free volume of the cavity

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

However, in this method, because the supramolecular structure of the fiber is still very similar to that of conventional polyester, and the accessibility of cationic dyes to the sulfonic acid dye base is low, it is still necessary to use the same high-temperature and high-pressure dyeing method as conventional polyester fibers. Normal temperature cationic fibers can be prepared by adding polyether, but their thermal stability and spinnability are still poor

Method used

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  • Viscose imitated polyester filament yarn and preparation method thereof
  • Viscose imitated polyester filament yarn and preparation method thereof
  • Viscose imitated polyester filament yarn and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] The preparation method of imitation viscose polyester filament, the steps are as follows:

[0054] (1) prepare modified polyester;

[0055] (1.1) Preparation of 2,2,5,5-tetramethyl-3,4-hexanediol;

[0056] 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:

[0057]

[0058] The structural formula of the prepared 2,2,5,5-tetramethyl-3,4-hexanediol is shown in formula (I), where R is -H;

[0059] (1.2) Esterification ...

Embodiment 2

[0076] The preparation method of imitation viscose polyester filament, the steps are as follows:

[0077] (1) prepare modified polyester;

[0078] (1.1) Preparation of 2-tert-butyl-1,6-hexanedicarboxylic acid;

[0079] 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;

[0080] (1.2) Preparation of 2,2,5,5-tetramethyl-3,4-diethyl-3,4-hexanediol;

[0081] 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 solut...

Embodiment 3

[0093] The preparation method of imitation viscose polyester filament, the steps are as follows:

[0094] (1) prepare modified polyester;

[0095] (1.1) Preparation of 2-tert-butyl-1,6-hexanedicarboxylic acid;

[0096] 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;

[0097] (1.2) Preparation of 2,2,4,4-tetramethyl-3,4-di-tert-butyl-3,4-hexanediol;

[0098] 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 wa...

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Abstract

The invention relates to a viscose imitated polyester filament yarn and a preparation method thereof. The preparation method comprises the following steps: uniformly mixing terephthalic acid, ethyleneglycol, a binary acid with a tert-butyl side group and hexanediol with a tert-butyl side group, and sequentially carrying out an esterification reaction and a polycondensation reaction to prepare modified polyester; preparing modified polyester POY yarns from modified polyester melt according to a POY process by adopting a triangular special-shaped spinneret plate; and finally, preparing the viscose imitated polyester filament yarns from the modified polyester POY yarns according to a DTY process. The binary acid with the tert-butyl side group is 5-tert-butyl-1,3-phthalic acid, 2-tert-butyl-1,6-adipic acid, 3-tert-butyl-1,6-adipic acid or 2,5-tert-butyl-1,6-adipic acid; and the prepared viscose imitated polyester filament yarn has the dye-uptake of 87.3-91.2% under the temperature condition of 125 DEG C, also has the K/S value of 22.15-25.4, and is high in color fastness. The preparation method disclosed by the invention is simple in process, and the prepared product is excellent in dyeing property.

Description

technical field [0001] The invention belongs to the technical field of polyester fibers, and relates to a viscose imitation polyester filament and a preparation method thereof. Background technique [0002] Viscose is the first man-made fiber to realize industrial production. Viscose fiber can not only supplement the shortage of natural fibers in quantity, but also be superior to natural fibers and synthetic fibers in some aspects of quality. It can not only be used as clothing materials, but also enrich There are many kinds of textiles, and they are widely used in industry, agriculture, national defense and scientific research. However, in the production process of viscose fiber, a large amount of caustic soda is used, which seriously pollutes the environment, and the production and manufacturing are restricted by national policies. [0003] By modifying polyester to develop imitation viscose filament, it can basically meet the characteristics of viscose fiber. It not only...

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): D01F6/84C08G63/183D01D5/08D01D5/088D01D5/12D01D5/253D01D10/02
Inventor 王丽丽王雪张元华
Owner JIANGSU HENGLI CHEM FIBER
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