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Natural dye dyeing method

A technology of natural dyes and dyeing methods, which is applied in dyeing methods, textiles and papermaking, etc. It can solve the problems of unsatisfactory dyeing effect, unconsidered metal ion hydrolysis and coordination, etc., and achieve the effect of improving fastness and facilitating penetration

Active Publication Date: 2020-02-04
KAISHENG TEXTILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The traditional natural dye mordant does not consider the hydrolysis and coordination of metal ions in the solution, and is usually carried out at a higher temperature and a larger bath ratio, so the dyeing effect is not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Step 1): Dye the silk fabric with curcumin, the amount of natural dye is 0.5% (o.m.f), the liquor ratio is 1:20, the dyeing temperature is 50°C, and the dyeing time is 30 minutes. After dyeing, the fabric is washed 3 times with water and aired naturally dry, spare;

[0026] Step 2): Dissolve the mordant ferrous sulfate in deionized water, adjust the pH value to 3 with formic acid, add anhydrous sodium sulfate, and wait until it is completely dissolved for later use.

[0027] Step 3): Immerse the fabric dyed in step (1) into the above-mentioned mordant bath. The dosage of each component in the mordant bath is: ferrous sulfate dosage 2% (o.m.f), anhydrous sodium sulfate 5g / L; liquor ratio 1:5 , treat at 20°C for 90 minutes, add deionized water to dilute to a bath ratio of 1:30; then raise the temperature to 50°C, and after 60 minutes of treatment, adjust the pH value of the solution to 6 with baking soda, keep warm for 10 minutes, take out the fabric, and wash the fabric ...

Embodiment 2

[0032] Step 1): Dye the wool fabric with chestnut shell pigment, the amount of natural dye is 5% (o.m.f), the bath ratio is 1:40, the dyeing temperature is 80°C, and the dyeing time is 30 minutes. dry, ready for use;

[0033] Step 2): Dissolve the mordant ferric chloride in deionized water, adjust the pH value to 4 with formic acid, add anhydrous sodium sulfate, and wait until it is completely dissolved for later use.

[0034] Step 3): Immerse the fabric dyed in step (1) into the above-mentioned mordant bath. The dosage of each component in the mordant bath is: ferric chloride dosage 4% (o.m.f), anhydrous sodium sulfate 10g / L; liquor ratio 1:8 , treated at 25°C for 45 minutes, added deionized water to dilute to a bath ratio of 1:40; then raised the temperature to 60°C, and after 30 minutes of treatment, adjusted the pH value of the solution to 7 with baking soda. After rinsing with the solution, wash it with water 5 times and let it dry naturally.

Embodiment 3

[0039] Step 1): Dye silk / wool blended fabrics with gardenia yellow pigment, the amount of natural dyes is 1% (o.m.f), the liquor ratio is 1:30, the dyeing temperature is 60°C, and the dyeing time is 40 minutes. After dyeing, the fabric is washed with water 4 times, dry naturally, and set aside;

[0040] Step 2): Dissolve the mordant aluminum sulfate in deionized water, adjust the pH value to 3.5 with formic acid, add anhydrous sodium sulfate, and wait until it is completely dissolved for later use.

[0041] Step 3): Immerse the fabric dyed in step (1) into the above-mentioned mordant bath. The dosage of each component in the mordant bath is: aluminum sulfate dosage 3% (o.m.f), anhydrous sodium sulfate 6g / L; liquor ratio 1:6, Treat at 22°C for 60 minutes, add deionized water to dilute to a bath ratio of 1:35; then raise the temperature to 55°C, after 45 minutes of treatment, adjust the pH of the solution to 6.5 with baking soda, keep warm for 12 minutes, take out the fabric, an...

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Abstract

The invention discloses a natural dye dyeing method. The natural dye dyeing method comprises the following steps: step 1) dyeing fabrics by adopting natural dyes, wherein the use amount of the naturaldyes is 0.5-5% (o. m. f), and the bath ratio is 1: 20-40, and the dyeing temperature is 50-80 DEG C; and naturally airing for later use after dyeing is finished; step 2) dissolving a mordant in deionized water, adjusting the pH value to be 3-4, adding a neutral electrolyte, and completely dissolving; step 3) immersing the dyed fabric in the step 1) into a mordant bath, wherein the bath ratio is 1: 5-1: 8; after treating the dyed fabric at the mordant dyeing temperature of 20-25 DEG C for 45-90 min, adding deionized water to dilute until the bath ratio is 1: 30-1: 40; and then heating to the temperature of 50-60 DEG C, treating the fabric, rinsing the fabric with a 0.5% oxalic acid solution, washing the fabric with water, and naturally airing the fabric. Mordant treatment is carried out atlow alkalinity, lower temperature and pH, and in the later period of mordant treatment, by means of increasing pH, heating, adding water for dilution and the like, hydrolysis and polymerization of hydrated metal ions are increased, molecules of a metal complex are enlarged, combination of the metal complex with natural dyes and fibers is promoted, and dyeing fastness of the natural dyes is improved.

Description

technical field [0001] The invention belongs to the technical field of textiles, in particular to a natural dye dyeing method. Background technique [0002] Natural dyes are dyes extracted from raw materials such as plants, animals, minerals, and microorganisms. They can not only color textiles, but also give textiles other additional functions, such as antibacterial and anti-ultraviolet, so they are deeply loved by people. . [0003] Due to poor color fastness, fabrics dyed with natural dyes usually require mordant treatment. The basic principle is: metal mordants can form complexes with natural dyes under suitable conditions, thereby improving their washing fastness. As we all know, solid metal salts are soluble in water, most of the metal ions first form hydrated ions with water molecules, and the hydrated metal ions react in the solution to give H+, which reduces the positive charge of the hydrated metal ions. For example, chromium ion will undergo the following hydro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P1/34D06P1/673D06P3/04D06P3/14D06P3/854D06P5/04
CPCD06P1/34D06P1/67341D06P1/6735D06P1/67358D06P3/04D06P3/14D06P3/8209D06P5/04
Inventor 顾萍
Owner KAISHENG TEXTILE
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