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Dyeing method suitable for polyamide fiber and aramid fiber blended textile

A dyeing method and technology for textiles, applied in the directions of dyeing method, textile and papermaking, fiber type, etc., can solve the problems of damaged fiber strength, unable to dye medium and dark colors, easy to break, etc.

Active Publication Date: 2015-02-18
ANHUI HUAMAO TEXTILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, although aramid fibers have been dyed and applied by carrier high-temperature dyeing methods, it is still difficult to dye deep, thick and bright colors, which limits the application range of this fiber and also limits the application of its mixed yarn fabrics. Application range
At the same time, due to the low glass transition temperature of nylon fiber (40°C), it is particularly easy to dye deep and bright colors, but in its molecular structure, the C-N bond of the amide group -CO-NH- and the C-O bond in the main chain of the macromolecule are heated Afterwards, they are easy to break, which reduces the degree of polymerization of macromolecules and causes a decrease in strength. Therefore, the heat resistance of nylon fibers is poor, especially under acidic conditions. "Phenomenon, resulting in serious damage to fiber strength
Therefore, when dyeing aramid and nylon blended textiles, if the above-mentioned traditional carrier and high temperature dyeing method is used, it will inevitably cause damage to the strength of nylon, low color uptake during aramid dyeing, and the inability to dye medium-dark colors.

Method used

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  • Dyeing method suitable for polyamide fiber and aramid fiber blended textile
  • Dyeing method suitable for polyamide fiber and aramid fiber blended textile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Step 1: The nylon and aramid blended textiles to be dyed are mechanically shaped and placed in the dyeing vat of the liquid flow dyeing machine for pre-dyeing treatment: take 8 kg of dyed blended textiles and 240 kg of water, advanced soft water , add 98% NaOH 6g / L and scouring agent PS 1g / L when the temperature rises to 40°C, continue to heat up to 70°C, keep warm for 20 minutes, drain the liquid, wash with overflow for 10 minutes, wash with water for 10 minutes and drain; then enter soft water, When the temperature rises to 40°C, add the carrier CindyeDNK 20g / L, continue to heat up to 70°C, keep warm for 20 minutes, and drain;

[0026] Step 2: Dye the treated nylon and aramid fiber blended textiles obtained in step 1. Specifically, implement according to the following steps: a. Aramid dyeing, enter soft water, add carrier CindyeDNK30g / L when the temperature rises to 40°C, and continue to heat up to 70°C Finally, the cationic dyes of red FBL200%2.0%owf and orange RN200...

Embodiment 2

[0029] (1) The nylon and aramid blended textiles to be dyed are mechanically shaped and placed in the dyeing tank of the liquid flow dyeing machine for pre-dyeing treatment: take 6 kg of dyed blended textiles and 180 kg of water, advanced soft water , add 98% NaOH 6g / L and scouring agent PS 1g / L when the temperature rises to 40°C, continue to heat up to 70°C, keep warm for 20 minutes, drain the liquid, wash with overflow for 10 minutes, wash with water for 10 minutes and drain; then enter soft water, Add carrier CindyeDNK 20g / L when the temperature rises to 40°C, continue to heat up to 70°C, keep warm for 20 minutes, and drain;

[0030] (2) Dye the treated nylon and aramid blended textiles obtained in step (1), and implement according to the following steps: a. Aramid dyeing, enter soft water, add carrier CindyeDNK 30g / L when the temperature rises to 40°C, and continue to heat up to After 70°C, evenly mix the cationic dyes of red FBL200%2.0%owf and orange RN200%2.5%owf to make...

Embodiment 3

[0033] Step 1: The nylon and aramid blended textiles to be dyed are mechanically shaped and placed in the dyeing vat of the liquid flow dyeing machine for pre-dyeing treatment: take 10 kg of dyed blended textiles and 300 kg of water, advanced soft water , add 98% NaOH 6g / L and scouring agent PS 1g / L when the temperature rises to 40°C, continue to heat up to 70°C, keep warm for 20 minutes, drain the liquid, wash with overflow for 10 minutes, wash with water for 10 minutes and drain; then enter soft water, When the temperature rises to 40°C, add the carrier CindyeDNK 20g / L, continue to heat up to 70°C, keep warm for 20 minutes, and drain;

[0034] Step 2: Dye the treated nylon and aramid fiber blended textiles obtained in step 1. Specifically, implement according to the following steps: a. Aramid dyeing, enter soft water, add carrier CindyeDNK30g / L when the temperature rises to 40°C, and continue to heat up to 70°C Finally, 7GL yellow 0.8% cationic dyes were made into a dye solu...

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Abstract

The invention discloses a dyeing method suitable for polyamide fiber and aramid fiber blended textile. The method is implemented by the following steps: treating the polyamide fiber and aramid fiber blended textile to be dyed by mechanical sizing before dyeing; then, dyeing the treated polyamide fiber and aramid fiber blended textile; firstly, dyeing aramid fiber by dye liquor containing cationic dye and carrier, and then washing; then, dyeing polyamide fiber by acid dye liquor, washing, discharging sewage, feeding 2g / L of a softening agent CA, 5g / L of an anti-ultraviolet finishing agent CTA and 0.12g / L of organic acid ACR into the washed polyamide fiber, treating for 20 minutes at the temperature of 40 DEG C, carrying out dehydration, and drying to obtain the colored polyamide fiber and aramid fiber blended textile. The dyeing method has the characteristics of being simple in technology, environment-friendly, short in process and free from damage to the inherent excellent properties of the fiber; after the dyeing method is adopted, the aramid fiber of the blended textile can be smoothly dyed, and the polyamide fiber of the blended textile is not damaged, so that the application field of the blended textile is greatly expanded.

Description

technical field [0001] The invention relates to the technical field of textile chemistry, in particular to a dyeing method suitable for nylon and aramid blended textiles. Background technique [0002] Due to the molecular structure characteristics of aramid fiber and nylon fiber, there is a big difference in their chemical properties. The macromolecules inside the aramid fiber are oriented along the longitudinal direction, and the degree of orientation is high, forming a defective structure of about 100%, with a very strong chain The intermediate structure makes it have the characteristics of crystallization and high glass transition temperature, and it is extremely difficult to dye. In recent years, although aramid fibers have been dyed and applied by carrier high-temperature dyeing methods, it is still difficult to dye deep, thick and bright colors, which limits the application range of this fiber and also limits the application of its mixed yarn fabrics. application rang...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P1/00D06P1/39D06P1/653D06P1/44D06P3/87D06M11/38D06M101/34D06M101/36
Inventor 方长国金王保章军王莉
Owner ANHUI HUAMAO TEXTILE
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