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Color-fixing process for natural dyeing of textiles

A process method and textile technology, which is applied in the field of color fixation of natural dye dyeing, can solve the problems of affecting the stability of the dye solution, the limited effect of improving the utilization rate of dyestuffs, and the complicated pretreatment modification method, so as to improve the fastness to soaping Degree, inhibition of discoloration tendency or decolorization, effect of increasing stability

Active Publication Date: 2018-03-02
EASTERN LIAONING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pretreatment modification method is relatively complicated, and when the cationic modified fiber is dyed, it is easy to bring unfixed modifiers into the dye bath. These modifier components directly react with anionic natural dyes, affecting the dyeing solution. stability
On the whole, both methods have very limited effects on improving the utilization rate of dyestuffs

Method used

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  • Color-fixing process for natural dyeing of textiles

Examples

Experimental program
Comparison scheme
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preparation example Construction

[0014] Preparation of natural dye stock solution:

[0015] Take dried natural plant raw materials, remove impurities, wash, dry naturally or dry, crush, generally crushed to 0.1~1cm, and soak in water at a mass ratio of 1:5~15, and soak at room temperature for 2~8 hours, then reflux extraction at a temperature of 60°C~105°C for 40~80 minutes, filter to remove the residue, and the obtained filtrate is a natural dye stock solution, wherein, according to the different heat-resistant properties of plants, such as oak bark and leaves, The reflux extraction temperature can be controlled at 90-102°C.

[0016] dyeing:

[0017] Natural dye solution for dyeing, wherein the mass percentage of the natural dye stock solution is 50% to 100%, and the rest is water. The natural dye stock solution can be a single extract of a natural plant material, or two or A mixture of two or more natural plant raw materials to extract the dye stock solution. The dyeing process is: liquor ratio 1:30~80, ...

Embodiment 1

[0020] The textile of this embodiment is mulberry silk or mulberry silk fabric, and the raw material of natural dyestuff is oak leaf.

[0021] 1. Preparation of natural dye stock solution: collect fallen oak leaves in winter, wash and dry, crush, mix oak leaves with water at a mass ratio of 1:10, soak at room temperature for 3 hours, reflux at 100°C for 60 minutes, and filter the extract , to obtain the oak leaf natural dye stock solution;

[0022] 2. Dyeing: adjust the pH value of the natural dye stock solution to 3.5 with glacial acetic acid, dip into mulberry silk or silk fabric at a bath ratio of 1:60, dye at 98°C for 45 minutes, take out the mulberry silk or silk fabric, and wash with water;

[0023] 3. Fixing process method:

[0024] Step 1: immerse the dyed mulberry silk or mulberry silk fabric in the first treatment solution, soak for 2 minutes at room temperature, dip twice and rub twice, with a scraping rate of 100%, and dry at 80°C. The first treatment solution is...

Embodiment 2

[0027] The textile of the present embodiment is a nylon fabric, and the original material of the natural dyestuff is oak bark.

[0028]1. Preparation of natural dye stock solution: take discarded dried oak bark, crush it into 0.1-1 cm pieces, immerse oak bark and water in water at a mass ratio of 1:8, soak at room temperature for 5 hours, and then reflux extraction at 102°C for 70 minutes , filter to remove the residue, and obtain the oak bark natural dye stock solution;

[0029] 2, dyeing: get above-mentioned natural dye stock solution and water to mix as dyeing bath, natural dye stock solution accounts for 60% by mass, the pH value of adjusting dye bath by dilute sulfuric acid is 3. The bath ratio of nylon fabric and dyeing bath is 1: 50, dyeing 80 minutes under temperature 100 ℃, take out washing dyed nylon fabric;

[0030] 3. Fixing process method:

[0031] Step 1. Immerse the dyed nylon fabric in the first treatment solution, soak it for 2.5 minutes at room temperature,...

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Abstract

The color-fixing process for natural dyeing of textiles provided by the application of the present invention is a two-step color-fixing treatment method for textiles dyed with natural dyes. The first step is to immerse the dyed textiles in the first treatment solution, and then process them through a conventional padding and drying process. Step two In the first step, the textiles are immersed in the second treatment solution, and processed by a conventional padding and baking process to finally obtain a finished dyed product. The first treatment liquid includes penetrant JFC, glyoxal, aluminum trichloride and citric acid or tartaric acid, and the second treatment liquid includes polyvinyl alcohol or urea. This technical solution improves various color fastness technical indicators including soaping fastness, rubbing fastness, perspiration fastness and light fastness, and does not use any auxiliary agent in the whole dyeing process. , in line with the environmental protection and biocompatibility index requirements of the country and European and American countries, and also has the technical advantages of high utilization rate of natural dyes and high comprehensive optimization of technology and economy.

Description

technical field [0001] The application of the present invention relates to the dyeing process of textile fibers or their fabrics and its post-treatment method, especially to the color-fixing method of natural dye dyeing. Background technique [0002] Fabric dyeing has experienced the technological development from natural dyeing to chemical synthetic dyeing. During this process, people have more awareness and understanding of the hazards of chemical synthetic dyeing to human health, especially the unavoidable environmental pollution. Technical disadvantages. Nowadays, with the increasing call for returning to nature, natural dyeing technology has once again entered people's field of vision. It is a new research topic for technicians to re-understand natural dyeing, how to maximize strengths and avoid weaknesses, and further develop the textile green industry on a new level. [0003] Although natural dyes and their dyeing have many advantages, the reason why chemical synthet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06P5/04D06P5/10D06P5/08D06P5/06D06P1/34
CPCD06P1/34D06P5/04D06P5/06D06P5/08D06P5/10
Inventor 贾艳梅于学智王淑颖
Owner EASTERN LIAONING UNIV
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