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Method for dyeing cotton fibers by using natural dye

A dyeing method and technology of natural dyes, applied in the direction of dyeing method, fiber treatment, textile and paper making, etc., can solve the problems of long-term boiling and low dyeing rate, etc., and achieve uniform modification or dyeing, natural color and light, The effect of improving fastness

Active Publication Date: 2012-08-15
CHANGZHOU MYSUN BIOLOGICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of low dye uptake rate of natural dyes on cotton fibers and many discolorations caused by boiling for a long time after dyeing

Method used

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  • Method for dyeing cotton fibers by using natural dye
  • Method for dyeing cotton fibers by using natural dye
  • Method for dyeing cotton fibers by using natural dye

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Cotton thread 5g, after boiling in boiling water for 5 minutes, take it out and set aside. Put the above-mentioned treated cotton thread into the chitosan modifier solution with a concentration of 2% (relative to the weight of the cotton thread), the bath ratio is 1:50, the modification temperature is 65°C, and after the modification time is 30min, take it out and wash it for later use ; Adopt gardenia yellow, tea tree fruit red brown, and Daqingye indigo to dye the above-mentioned cotton threads respectively, the dyeing solution formula: dye concentration (mass ratio of dyestuff to cotton thread) is 2%, bath ratio 1: 50, dyeing temperature is 75 ℃, pH value is 7, after the dyeing time is 80min, take out and wash with water for later use; color fixing liquid formula: the amount of color fixing agent sodium chloride (relative to the weight of cotton thread) is 5%, put the above dyed cotton thread into it for color fixing , the color fixing temperature is 50°C, and after ...

Embodiment 2

[0025] Cotton thread 5g, after boiling in boiling water for 3 minutes, take it out and set aside. Put the above-mentioned treated cotton thread into the chitosan modifier solution with a concentration of 3% (relative to the weight of the cotton thread), the bath ratio is 1:30, the modification temperature is 90°C, and after the modification time is 40min, take it out and wash it for later use ; adopt gardenia yellow, tea tree fruit red brown, and Daqingye indigo to dye the above-mentioned cotton thread respectively, and the dye solution formula: the dye concentration (mass ratio of dyestuff to cotton thread) is 8%, the bath ratio is 1: 30, and the dyeing temperature is 85 ℃, the pH value is 4-5, after the dyeing time is 30 minutes, take it out and wash it for later use; the fixation liquid formula: the amount of the fixation agent sodium sulfite (relative to the weight of the cotton thread) is 4%, put the above-mentioned dyed cotton thread into it for color fixation , the colo...

Embodiment 3

[0027] Cotton thread 5g, after boiling in boiling water for 4 minutes, take it out and set aside. Put the above-mentioned treated cotton thread into the chitosan modifier solution with a concentration of 4% (relative to the weight of the cotton thread), the bath ratio is 1:40, the modification temperature is 95°C, and after the modification time is 35 minutes, take it out and wash it for later use ; Adopt gardenia yellow, tea tree fruit red brown, and Daqingye indigo to dye the above-mentioned cotton thread respectively, the dyeing solution formula: the dye concentration (mass ratio of dyestuff to cotton thread) is 5%, the bath ratio is 1: 30, and the dyeing temperature is 95 ℃, the pH value is 3-4, after the dyeing time is 60min, take it out and wash it for later use; the color fixing liquid formula: the amount of color fixing agent potassium aluminum sulfate dodecahydrate (relative to the weight of the cotton thread) is 1%, put the above dyed cotton thread Put it into it for...

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Abstract

The invention relates to a method for dyeing cotton fibers by using a natural dye, comprising the following steps of: 1) boiling the cotton fibers and drying the cotton fibers for later use; 2) modifying the cotton fibers; 3) dyeing the cotton fibers; and 4) fixing the color of the cotton fibers, wherein the dosage of a color fixing agent is 1-5% of the mass of the cotton fibers, the temperature of color fixation is 50-85 DEG C, the color fixing agent is added to the cotton fibers obtained in step 3), the time of color fixation is 20-50 min, drying is performed after water washing, and the color fixing agent can be one or two of sodium chloride, sodium sulfite, citric acid and aluminum potassium sulfate dodecahydrate. The food-grade fixing agent is selected in the method; therefore, the troubles caused by synthetic dyes and heavy metals for the health of human are solved, and the fastness of the cotton fibers can be enhanced; as a result, the dyed cotton fibers are natural and soft in color and have no harm to the human body and the environment.

Description

technical field [0001] The invention relates to a method for dyeing cotton fibers with natural dyes. Background technique [0002] In the field of food packaging, the cotton fibers used are basically dyed with synthetic dyes, such as zongzi binding thread. Zongzi is one of the foods with the deepest cultural accumulation in Chinese history and the ancestor of fast food in the world. Zongzi has become more and more popular among consumers due to its cultural and historical significance, uniqueness and diversity of taste, and has evolved from a symbolic food of the Dragon Boat Festival to a daily convenience food. The increase in market demand for zongzi has led to the development of zongzi production enterprises. The zongzi produced by enterprises such as Zhejiang Wufangzhai and Beijing Daoxiangcun have become well-known brands of Chinese zongzi and are exported to foreign countries. The expansion of the Zongzi market has not only brought opportunities to the Zongzi industr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P1/34D06P3/60D06P5/10D06P5/04D06M15/03
Inventor 纪俊玲戴萍汪媛
Owner CHANGZHOU MYSUN BIOLOGICAL MATERIALS
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