Easily-dyed polyester FDY fibre and preparation method thereof

A polyester and fiber technology, applied in the field of polyester fiber, can solve the problems of poor degradation effect, slow degradation rate, poor dyeability, etc.

Active Publication Date: 2019-04-23
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the defects of poor dyeability, slow degradation rate and poor degradation effect of polyester fibers in the prior art, and pr

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] A kind of preparation method of dyeable polyester FDY fiber, the steps are as follows:

[0067] (1) prepare modified polyester;

[0068] (1.1) Preparation of solid heteropolyacid powder SiO 2 -TiO 2 ;

[0069] In parts by weight, first, stir and disperse 1 part of silica powder and 55 parts of water, add 2 parts of titanyl sulfate solution with a concentration of 4.5wt% dropwise, and then use a concentration of 1.0mol / L sodium hydroxide Adjust the pH value of the solution to neutrality, then adjust the pH value to 8 with sulfuric acid with a concentration of 10wt%, after aging for 2h, wash with deionized water until there is no SO 4 2- After suction filtration, the filter cake was washed with absolute ethanol several times, and then dried in a drying oven at a temperature of 100°C. Finally, the samples were calcined at 500°C for 2 hours and then pulverized to obtain a particle with an average particle size of 0.4 microns. Solid heteropoly acid SiO 2 -TiO 2 Powder...

Embodiment 2

[0086] A kind of preparation method of dyeable polyester FDY fiber, the steps are as follows:

[0087] (1) prepare modified polyester;

[0088] (1.1) Preparation of 2-tert-butyl-1,6-hexanedicarboxylic acid: firstly mix tungstic acid and hydrogen peroxide, stir at room temperature for 10 minutes, then add 2-tert-butylcyclohexanol and firstly mix at 80°C React for 1 hour, then raise the temperature to 94°C and react for 2 hours. During the reaction, the reactants are always in a reflux state, and finally undergo cooling crystallization, washing and refining. The ratio is 1:35:120;

[0089] (1.2) Preparation of solid heteropolyacid powder SiO 2 -ZrO 2 ;

[0090] In parts by weight, first, stir and disperse 1 part of silica powder and 58 parts of water, add 2 parts of zirconium sulfate solution with a concentration of 5wt% dropwise, and then use a sodium hydroxide solution with a concentration of 1.0mol / L Adjust the pH value to neutral, then adjust the pH value to 8 with a co...

Embodiment 3

[0101] A kind of preparation method of dyeable polyester FDY fiber, the steps are as follows:

[0102] (1) prepare modified polyester;

[0103] (1.1) Preparation of 2-tert-butyl-1,6-hexanedicarboxylic acid: firstly mix tungstic acid and hydrogen peroxide, stir at room temperature for 12 minutes, then add 2-tert-butylcyclohexanol and firstly mix at 83°C React for 1.5 hours, then raise the temperature to 90°C and react for 2 hours. During the reaction, the reactants are always in a reflux state, and finally carry out cooling crystallization, washing and refining. The molar ratio is 1:33:120;

[0104] (1.2) Preparation of solid heteropolyacid powder B 2 o 3 -Al 2 o 3 ;

[0105] In parts by weight, at first, 2.5 parts of concentration are added dropwise to 1 part of boric acid as a 4wt% aluminum sulfate solution, and then the sodium hydroxide solution with a concentration of 1.0mol / L is used to adjust the pH value to neutrality, and then use a concentration of 9wt% sulfuric...

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Abstract

The invention relates to an easily-dyed polyester FDY fibre and a preparation method thereof. The preparation method comprises the following steps: preparing modified polyester FDY filament from modified polyester melt according to an FDY process, thereby obtaining easily-dyed polyester FDY fibre. A preparation method for the modified polyester comprises the following step: sequentially performingesterification reaction and condensation polymerization after uniformly mixing terephthalic acid, ethylene glycol, dibasic acid with a tertiary butyl side group and high-temperature roasted solid heteropolyacid powder, wherein the dibasic acid with the tertiary butyl side group is 5-tertiary butyl-1,3-phthalic acid, 2-tertiary butyl-1,6-adipic diformic acid, 3-tertiary butyl-1,6-adipic diformic acid or 2,5- di-tert-butyl-1,6-adipic diformic acid. The prepared product has a dyeing rate of 87.7-92.2% under a temperature condition of 120 DEG C, and has a K/S value of 22.54-25.87. The preparationmethod is simple, is low in cost, increases a polyester hydrolysis rate, and improves dyeing performance of polyester fibres.

Description

technical field [0001] The invention belongs to the technical field of polyester fibers, and relates to an easy-to-dye polyester FDY fiber and a preparation method thereof. Background technique [0002] The continuous expansion and development of polyester (PET) fiber production scale has made polyester fiber and its products widely used in many fields, especially in the fields of clothing, luggage and industrial use. With the continuous development of the economy and the improvement of people's lives, people have higher and higher requirements for bags and clothing fabrics, which put forward higher requirements for the performance of polyester fibers. [0003] Polyester filament is a fiber-forming high polymer made from purified terephthalic acid or dimethyl terephthalate and ethylene glycol through esterification or transesterification and polycondensation reactions—polyethylene terephthalate. Glycol esters, fibers made by spinning and post-processing. According to the p...

Claims

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Application Information

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IPC IPC(8): D01F6/92D01F1/10C08G63/183C08G63/78D01D5/08D01D5/088
CPCC08G63/183C08G63/78D01D5/08D01D5/088D01F1/10D01F6/92
Inventor 王丽丽王小雨胡景波
Owner JIANGSU HENGLI CHEM FIBER
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