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Preparation method for improving dyeing depth of natural dye and reactive dye of wool

A technology of natural dyes and reactive dyes, applied in the field of improving the dyeing depth of wool natural dyes and reactive dyes, can solve the problems of large amount of ethanolamine, uneven dyeing, etc., achieve low loss rate, increase dyeing depth, and low implementation cost Effect

Active Publication Date: 2018-05-18
常州喜莱维纺织科技有限公司
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Problems solved by technology

However, according to previous pre-experiments and literature, it is easy to cause uneven dyeing if the wool is pretreated directly with dilute sodium hydroxide and then dyed with natural dyes or reactive dyes; The dosage is larger

Method used

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  • Preparation method for improving dyeing depth of natural dye and reactive dye of wool

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[0019] As shown in the examples, the present invention is a preparation method for improving the dyeing depth of wool natural dyes and reactive dyes, and the preparation method comprises the following steps:

[0020] (1) Wool pretreatment: soak the wool fiber in a solution composed of sodium citrate, sodium ethoxide, penetrant and water, and treat it at 30-50°C for 20-40min, the mass fraction of sodium citrate is 0.02-0.06% , the mass fraction of sodium ethoxide is 0.01-0.04%, the mass fraction of penetrant is 0.01-0.05%, and the rest is water;

[0021] (2) Acid neutralization and water washing: the wool fiber pretreated in step (1) is neutralized with an appropriate amount of acid and washed with water;

[0022] (3) Dyeing: dyeing the wool fibers prepared in step (2) with dyestuffs.

[0023] Wherein: in the step (1), the sum of the mass fractions of sodium citrate and sodium ethylate ranges from 0.03-0.08%; the penetrating agent is sodium isooctyl alcohol polyoxyethylene eth...

Embodiment 1

[0026] First, immerse 10Kg wool yarn in a pretreatment solution consisting of 0.05Kg sodium citrate, 0.02Kg sodium ethoxide, 0.02Kg penetrant OPE and 99.92Kg water. The immersion temperature is 45°C, and the immersion time is 30min. The pretreatment is completed. Finally, through acid neutralization and water washing, the pH value of the wool yarn is adjusted to neutral; then, the above wool yarn is dipped in 150Kg dyeing solution composed of 0.20Kg amaranth natural dye and an appropriate amount of water, and the dyeing solution is Raise the temperature to 80°C and keep at the temperature for 60 minutes; after the dyeing is completed, wash and dry to obtain red dyed wool yarn.

Embodiment 2

[0028] First, immerse 10Kg wool yarn in a pretreatment solution consisting of 0.06Kg sodium citrate, 0.02Kg sodium ethoxide, 0.04Kg penetrant OPE and 99.88Kg water. The immersion temperature is 30°C and the immersion time is 40min; the pretreatment is completed Finally, through acid neutralization and water washing, the pH value of the wool yarn is adjusted to neutral; then, the above wool yarn is dipped in 150Kg dyeing solution composed of 0.20Kg amaranth natural dye and an appropriate amount of water, and the dyeing solution is Raise the temperature to 80°C and keep at the temperature for 60 minutes; after the dyeing is completed, wash and dry to obtain red dyed wool yarn.

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Abstract

The invention discloses a preparation method for improving dyeing depth of natural dye and reactive dye of wool. The preparation method comprises the following steps: (1) performing pre-treatment on the wool, namely, soaking wool fibres in a pre-treatment liquid which is compounded by sodium citrate, sodium ethoxide and a penetrating agent, and treating for 20 to 40 minutes at 30 to 50 DEG C; (2)performing acid neutralizing and water washing, namely, neutralizing the pre-treated wool fibres with a suitable amount of acid and washing the neutralized wool fibres with water; and (3) dyeing, namely, dyeing the wool fibres by adopting the natural dye and a reactive dye for wool. According to the preparation method, after the wool fibres are treated at low temperature through a diluted pre-treatment liquid, the wool fibres are dyed through the natural dye or the reactive dye for the wool. A dyed wool product with soft hand feeling, deep colour and excellent colour fastness can be prepared;the method is simple and feasible and is low in implementation cost, and has low damage to wool strength; and energy resources are saved by low-temperature dyeing.

Description

technical field [0001] The invention belongs to the technical field of textile pretreatment and dyeing, and in particular relates to a preparation method for improving the dyeing depth of wool natural dyes and reactive dyes. Background technique [0002] Wool is a high-grade natural protein fiber with excellent properties such as soft luster, good resilience, strong moisture absorption, not easy to stain, light and warm; the outermost layer of wool is scale layer, which is transformed from protoplasmic cell membrane and is cutin The oxidized cells have strong chemical inertness, which will prevent the dye from entering the fiber during the dyeing process of wool; generally, high-temperature dyeing, pretreatment, mordant and other measures are required to promote dyeing during the dyeing process of wool. went smoothly. [0003] When natural dyes are used to dye wool, because natural dyes have low affinity with fibers, metal ion mordants are generally used to improve dyeing u...

Claims

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Application Information

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IPC IPC(8): D06P3/14D06P1/44D06P1/38
CPCD06P1/38D06P1/445D06P3/148
Inventor 曹红梅张茜茜刘建平杨振铭艾丽朱亚伟
Owner 常州喜莱维纺织科技有限公司
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