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Reactive dye dyeing technology of cashmere

A technology of reactive dyes and cashmere, applied in the field of dyeing, can solve the problems of scales falling off, curling and recovery elasticity damage of cashmere fibers, etc.

Inactive Publication Date: 2018-12-28
JIANGSU SUNSHINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high dyeing temperature, the scales of cashmere fibers will fall off, resulting in impaired curl recovery elasticity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The reactive dye dyeing process of embodiment 1 cashmere comprises the following steps:

[0022] S1: washing cashmere, drying;

[0023] S2: uniformly disperse the cashmere obtained in S1 in an acidic aqueous solution containing rare earth chloride, react at 40° C. for 2 hours, take out the cashmere, wash and dry;

[0024] S3: Add reactive dye (Lanasol red) to the dyeing solution at 40°C, the amount of reactive dye in the dyeing solution is 10owf%, the liquor ratio of dyeing solution to cashmere is 1:12, and then slowly raise the temperature of the dyeing solution to 87°C, Heat preservation reaction for 1 hour, cool down to 80°C, add dye coupler, heat preservation reaction for 40 minutes, and take out the cashmere;

[0025] S4: placing the cashmere with liquid at 5°C for 12 hours;

[0026] S5: Color fixing treatment.

[0027] The pH value of the acidic aqueous solution of rare earth chloride is 6.5, and the pH regulator of the acidic aqueous solution of rare earth chl...

Embodiment 2

[0031] The difference between embodiment 2 and embodiment 1 is:

[0032] S2: React at 45°C for 1 hour, take out the cashmere, wash and dry it;

[0033] S3: Add reactive dyes to the dyeing solution at 45°C. The amount of reactive dyes in the dyeing solution is 7owf%, and the bath ratio of the dyeing solution to cashmere is 1:20. Then slowly raise the temperature of the dyeing solution to 82°C and keep it warm for 1.5 hours. , lower the temperature to 70°C, add dye coupler, keep warm for 60 minutes, and take out the cashmere;

[0034] S4: placing the cashmere with liquid at 0°C for 24 hours;

[0035] The pH value of the acidic aqueous solution of rare earth chloride is 5.5, and the pH regulator of the acidic aqueous solution of rare earth chloride is acetic acid.

[0036] The dye coupler in S3 is composed of 1,6-hexanediol and a substituted m-aminophenol coupler, and the weight percentage of 1,6-hexanediol in the dye coupler is 40%.

[0037] The consumption of dye coupling ag...

Embodiment 3

[0039] The difference between embodiment 3 and embodiment 2 is:

[0040] S2: React at 42°C for 1.5 hours, take out the cashmere, wash and dry;

[0041] S3: Add reactive dyes to the dyeing solution at 42°C. The amount of reactive dyes in the dyeing solution is 8.5owf%, and the bath ratio of dyeing solution to cashmere is 1: (16), then slowly raise the temperature of the dyeing solution to 85°C and keep warm React for 1 hour, cool down to 750-80°C, add dye coupler, keep warm for 50 minutes, and take out the cashmere;

[0042] S4: place the cashmere with liquid at 2°C for 12 hours;

[0043] The pH value of the acidic aqueous solution of rare earth chloride is 6, and the pH regulator of the acidic aqueous solution of rare earth chloride is formic acid 6.

[0044] The dye coupler in S3 is composed of 1,6-hexanediol and a substituted m-aminophenol coupler, and the weight percentage of 1,6-hexanediol in the dye coupler is 50%.

[0045] The consumption of dye coupler is 7owf%. The...

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Abstract

The invention discloses a reactive dye dyeing technology of cashmere. The reactive dye dyeing technology comprises four steps of cleaning cashmere, performing activation, performing dyeing and performing color fixation. According to the reactive dye dyeing technology of cashmere, a ferrous complexing step is additionally performed, pigment in purple cashmere can be complexed with ferrous iron ionsto form chelated substances, then through oxidation reduction, bleaching is performed, the purple cashmere is white wholly after bleaching treatment, the fiber whiteness of the cashmere is obviouslyimproved, the weight loss is controlled within 5%, and influence on the whole shape and the structure violence of the cashmere is small. According to the reactive dye dyeing technology of cashmere, astep of pretreating a rare earth chloride acid solution is additionally performed, and rare earth has the effect of activating fibers, so that the fibers can swell, and the structure is loose; and therare earth has the catalysis effect on the fibers and active centers in dye molecules, so that the surface activation energy of the fibers can be reduced, and further the dye-uptake at low temperature can be increased.

Description

technical field [0001] The invention relates to the technical field of dyeing, in particular to a reactive dye dyeing process for cashmere. Background technique [0002] Cashmere is a thin and curved fiber, which contains a lot of air and forms an air layer, which can defend against the invasion of external cold air and keep the body temperature without lowering. Cashmere is much thinner than wool, and the outer scales are also finer and smoother than wool. Therefore, it is light in weight, soft and tough. It is especially suitable for making underwear. When worn next to the skin, it is light, soft, soft and slippery, and very comfortable. [0003] Cashmere is composed of scale layer and cortex layer, the diameter is usually 13-16μm, no medulla layer, the scale density is higher than that of wool, but the visible height of cashmere scales is lower than that of fine wool, the scales are closely covered on the hair shaft, and the scales The existence of a small amount of lip...

Claims

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Application Information

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IPC IPC(8): D06P1/38D06P1/651D06P1/673D06P3/14
CPCD06P1/38D06P1/65118D06P1/67341D06P3/148
Inventor 陈丽芬陆芳李红陆卫东
Owner JIANGSU SUNSHINE
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