Polyester fiber dyeing process

A polyester fiber and process technology, applied in the field of polyester fiber, can solve problems such as large bath ratio, lower dyeing temperature, and easy fading, and achieve the effects of improving adsorption performance, excellent comprehensive performance, and enhancing color fixing effect

Inactive Publication Date: 2016-04-13
CHANGSHU XIANGYING SPECIAL FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in high temperature and high pressure dyeing, some disperse dyes have poor high temperature and dispersion stability, resulting in the problem of uneven dyeing. At the same time, due to the limitation of equipment safety under high temperature and high pressure conditions, the dyeing batch is small, the bath ratio is large, and the labor intensity is high. The problem of large consumption is very obvious, which seriously deviates from the development trend of ecological dyeing; normal pressure dyeing of disperse dyes mainly relies on adding carriers to accelerate the expansion and dyeing of polyester fibers, thereby reducing the dyeing temperature and increasing the percentage of dyeing , but the carrier is easy to remain on the fabric or fiber, which will affect the light fastness of the azo disperse dyes. At the same time, it will pollute the environment and poison the human body when used, and there is also the problem of easy fading, which affects the wearability of the fabric

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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A polyester fiber dyeing process, comprising the steps of:

[0021] (1) Pretreatment: Use sodium hydroxide, phosphorus-free degreaser and dispersant to prepare a pretreatment solution, then immerse the polyester fiber in the pretreatment solution at a bath ratio of 1:25, and rinse at 120°C for 20 minutes , then add the formic acid solution that the mass concentration is 5g / L to the mixed solution at a rate of 1mL / min, adjust the pH value to neutrality, and wash with clear water; wherein, the formula of the pretreatment solution is: sodium hydroxide is 4g / L, phosphorus-free degreaser is 5g / L, dispersant is 0.5g / L;

[0022] (2) Dyeing: raise the temperature of the dye solution to 40°C, then immerse the pretreated polyester fiber in step (1) in the dye solution at a bath ratio of 1:25, and first raise the temperature to 90°C at a rate of 2.5°C / min , then heat up to 120°C at a rate of 0.5°C / min, keep at a constant temperature for 10min, and then drop to room temperature a...

Embodiment 2

[0027] A polyester fiber dyeing process, comprising the steps of:

[0028] (1) Pretreatment: Use sodium hydroxide, phosphorus-free degreaser and dispersant to prepare a pretreatment solution, then immerse the polyester fiber in the pretreatment solution at a bath ratio of 1:25, and rinse at 130°C for 10 minutes , then to the mixed solution, adding mass concentration at a rate of 5mL / min is a formic acid solution of 5g / L, adjusts the pH value to neutral, and washes it with clear water; wherein, the formula of the pretreatment solution is: sodium hydroxide is 5g / L, phosphorus-free degreaser is 6g / L, dispersant is 1g / L;

[0029] (2) Dyeing: raise the temperature of the dye solution to 50°C, then immerse the polyester fiber pretreated in step (1) into the dye solution at a bath ratio of 1:25, and first raise the temperature to 90°C at a rate of 3°C / min , then heat up to 120°C at a rate of 1°C / min, keep at a constant temperature for 15min, and then drop to room temperature at a r...

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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PUM

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Abstract

The invention discloses a polyester fiber dyeing process, which comprises following steps (1) pretreatment; (2) dyeing; (3) soaping; (4) color fixing; (5) coiling. The polyester fiber dyeing process is simple and convenient to operate and easy to realize, and improves adsorptivity of polyester fiber to dye and enhances a color fixing effect of the dye by a reasonable process design, and the prepared polyester fiber has the advantages of good mechanical properties, uniform dyeing, no color fading after washing and excellent comprehensive properties.

Description

technical field [0001] The invention relates to the field of polyester fibers, in particular to a polyester fiber dyeing process. Background technique [0002] Polyester fibers are hydrophobic fibers made from polyethylene terephthalate. Due to the tight molecular chain structure of polyester and the lack of hydrophilic groups such as carboxyl and sulfonic acid groups, it cannot be dyed with direct dyes, acid dyes, and basic dyes. Most of the existing dyeing methods adopt high temperature and high pressure, hot melt or dyeing with disperse dyes in the presence of carriers. However, in high temperature and high pressure dyeing, some disperse dyes have poor high temperature and dispersion stability, resulting in the problem of uneven dyeing. At the same time, due to the limitation of equipment safety under high temperature and high pressure conditions, the dyeing batch is small, the bath ratio is large, and the labor intensity is high. The problem of large consumption is ver...

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): D06P1/673D06P1/653D06P3/52D06P5/02
CPCD06P1/6735D06P1/6533D06P3/52D06P5/02
Inventor 陶文祥
Owner CHANGSHU XIANGYING SPECIAL FIBER
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