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Wool low-temperature dyeing method

A low-temperature dyeing and wool technology, applied in the field of low-temperature dyeing of wool, can solve the problems of complex process, unsatisfactory effect, high acidity, etc., and achieve the effect of high dyeing bath exhaustion rate, fast dyeing rate and low dyeing temperature

Inactive Publication Date: 2009-12-16
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The formic acid method must require the use of expensive special equipment made of acid-resistant steel; the organic solvent method requires the recovery of organic solvents, and has high requirements for the sealing of the equipment, and the good performance of the dyed product is also seriously affected; the method of adding surfactants and The rare earth dyeing method has certain requirements on the dyes, and the acidity of the dyeing bath is extremely high, which increases the corrosion of the equipment and deteriorates the ecological environment; the low-temperature plasma treatment method has high cost, complicated process and unsatisfactory effect
In a word, the above-mentioned methods for low-temperature dyeing of wool have not been applied industrially.

Method used

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  • Wool low-temperature dyeing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1 Low temperature dyeing of wool skein with acid dye

[0024] Hang the worsted wool skein into the skein dyeing machine, add water to the specified liquor ratio, add 209 detergent and run for 5 minutes, then drain the water. Re-introduce water to the specified liquor ratio, add pre-dissolved weak acid magenta blue 6B dye, run for 10 minutes, add thiourea (according to the content of 0.05 moles in the dyeing bath), heat up after running for 10 minutes, and the temperature rise rate is controlled at 0.5°C per minute . After heating up to 80°C, add pre-diluted hydrogen peroxide (according to the content of 0.15 moles in the dyeing bath), keep it warm for 60 minutes, then cool down and wash it out of the vat. The color depth of the skein yarn obtained by this process is equivalent to the color depth at nearly 100°C without redox system.

[0025] Dye uptake rate (%) K / S

[0026] Routine dyeing at 98°C for 1.5h 88.9 35.27

[0027] Redox s...

Embodiment 2

[0028] Example 2 Low-temperature dyeing of wool garments with acid dyes

[0029] Put the woolen woolen sweater garment into the side paddle type garment dyeing machine, add water to the specified liquor ratio, add 209 detergent and run for 5 minutes, then drain the water. Re-introduce water to the specified bath ratio, add pre-dissolved weak acid yellow 6G dye, run for 10 minutes, add thiourea (according to the content of 0.01 mole in the dye bath), and run for 10 minutes to raise the temperature, and the temperature rise rate is controlled at 0.5°C per minute. After raising the temperature to 80°C, add pre-diluted hydrogen peroxide (according to the content of 0.03 moles in the dyeing bath), keep it warm for 60 minutes, then cool down and wash it out of the vat. The color depth of the woolen sweater obtained by this process is equivalent to the color depth near 100°C without redox system.

[0030] Dye uptake rate (%) K / S

[0031] Routine 98 dyeing ...

Embodiment 3

[0033] Embodiment 3 low temperature dyeing of wool skein reactive dye

[0034] Put the woolen woolen sweater garment into the side paddle type garment dyeing machine, add water to the specified liquor ratio, add 209 detergent and run for 5 minutes, then drain the water. Re-introduce water to the specified liquor ratio, add pre-dissolved Lanasol Yellow 4GK dye, run for 10 minutes, add thiourea (based on the content of 0.01 mole in the dye bath), and run for 10 minutes to raise the temperature. The temperature rise rate is controlled at 0.5°C per minute. After raising the temperature to 85°C, add pre-diluted hydrogen peroxide (according to the content of 0.03 moles in the dye bath), keep it warm for 60 minutes, then add ammonia water to adjust the pH of the dye bath to 8.5, and perform ammonia washing for 20 minutes, then cool down and wash out the vat. The color depth of the woolen sweater obtained by this process is equivalent to the color depth near 100°C without redox system...

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Abstract

The invention discloses a low-temperature dyeing method for wool. In addition to adding conventional dyes and auxiliary agents, a reducing agent is added to the dyeing bath, and then the temperature is raised to 70-85°C, and the oxidizing agent is added to keep warm for dyeing. The ratio of the reducing agent to the oxidizing agent It is 1:3. The redox system wool low-temperature dyeing method of the present invention is different from the low-temperature dyeing method of the prior art. The low-temperature dyeing method and process are to add reducing agents and oxidizing agents in the dyeing bath, and the consumption is small and the cost is low. It has the advantages of fast dyeing rate, good level dyeing property, high dyeing bath exhaustion rate, short dyeing time and low dyeing temperature. The invention can be used for wool dyeing with acid dyes and reactive dyes.

Description

1. Technical field [0001] The invention relates to a wool low-temperature dyeing method, more particularly to a wool low-temperature dyeing method in which a reducing agent and an oxidizing agent are added during wool dyeing. 2. Background technology [0002] Traditional wool dyeing requires a long-term boil-dyeing process, which can easily lead to damage and yellowing of wool fabrics, seriously affecting the quality, feel and brightness of dyed products, and it does not meet the needs of energy conservation. [0003] At present, there are formic acid method, organic solvent method, addition of surfactant method and low temperature plasma treatment method on wool low temperature dyeing methods both at home and abroad. The formic acid method must require the use of expensive special equipment made of acid-resistant steel; the organic solvent method requires the recovery of organic solvents, and has high requirements for the sealing of the equipment, and the good performance o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06P3/14D06P1/642
Inventor 汪澜郑今欢王宗乾陈维国
Owner ZHEJIANG SCI-TECH UNIV
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