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Denim continuous dyeing method

A denim and dyeing solution technology, applied in the field of fabric processing, can solve the problems of not being suitable for mass production, high cost, and excessive water consumption, and achieve the effects of low chroma of washing residual liquid, convenient operation, and reduced damage

Active Publication Date: 2020-05-08
邢台恒进纺织有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This dyeing method is inefficient, costly, and uses a lot of water, so it is not suitable for mass production

Method used

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  • Denim continuous dyeing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A preparation method of dispersant, comprising the following steps:

[0052] Add alkali lignin into an aqueous solution of 8wt% sodium hydroxide at a weight ratio of 1:1.5, stir evenly, then heat up to 72°C, and add 10% formaldehyde by weight of alkali lignin dropwise within 10 minutes under heat preservation , continue to keep warm for 1.5h. Continue to heat up to 95°C, add anhydrous sodium sulfite with 10% weight of alkali lignin, continue to keep warm for 1.5h, cool to room temperature, slowly add epichlorohydrin with 8.2% weight of alkali lignin under ultrasonic stirring state, stop after 2h of reaction Heating, using waste heat to evaporate the remaining unreacted epichlorohydrin, the pH value in the reaction process is 9.0, to obtain a dispersant, which contains the compound shown in formula I,

[0053] In the formula, X=CH 2 SO 3 Na,Y=OCH 3 .

[0054] The infrared spectroscopic analysis of alkali lignin and dispersant was carried out on the Nicolet infrare...

Embodiment 2

[0056] A preparation method of dispersant, comprising the following steps:

[0057] Add alkali lignin into an aqueous solution of 8wt% sodium hydroxide at a weight ratio of 1:1.5, stir evenly, then heat up to 72°C, and add 10% formaldehyde by weight of alkali lignin dropwise within 10 minutes under heat preservation , continue to keep warm for 1.5h. Continue to heat up to 95°C, add anhydrous sodium sulfite with 10% weight of alkali lignin, continue to keep warm for 1.5h, cool to room temperature and slowly add epichlorohydrin with 8.2% weight of alkali lignin under stirring state, stop heating after 2 hours of reaction , using waste heat to evaporate the remaining epichlorohydrin that has not participated in the reaction, and the pH value during the reaction is 9.0 to obtain a dispersant.

Embodiment 3

[0059] A method for continuous dyeing of denim, which contains cotton fibers, the method comprising the following steps:

[0060] Step S1: Arrange the denim in a solution containing 8g / L penetrant JFC and 5g / L caustic soda according to the bath ratio (denim: water) = 1:100 (g / g), pretreat at 80°C for 1 hour, and then Wash twice with water, rinse until the pH value of the rinse solution is 7-7.5;

[0061] Step S2: According to the bath ratio (denim: water) = 1:20 (g / g), the denim obtained in step S2 is arranged in a solution containing 30g / LLINEX SURF Italian auxiliary agent, and modified at 40°C for 30 minutes;

[0062] Step S3: using the method of double dipping and rolling, dyeing the denim obtained in step S3 with the dyeing solution containing 25g / L TR / 0265 Italian natural colored sand dye, the dyeing excess rate is 80%, and the temperature is 50°C; dyeing The back denim was fixed in 30g / L LINEX SUP solution at 60°C for 40min, and then dried at 90°C×3min.

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Abstract

The invention provides a denim continuous dyeing method, and belongs to the technical field of fabric processing. The denim contains cotton fibers, and the continuous dyeing method comprises the following steps of carrying out pretreatment on the denim by a solution containing a penetrating agent and caustic soda, and performing water washing for 2-3 times; carrying out modification treatment on the denim obtained in the step 1 by a dyeing assistant; and carrying out dyeing on the denim by a dyeing liquor containing a natural mineral dye by adopting a twice-dipping and twice-rolling method, and performing color fixing and dying. By adoption of the method, continuous dyeing of the denim is realized by the natural mineral dye, the obtained denim has relatively high K / S value, high level dyeing property and excellent color fastness to rubbing, and the water washing residual liquid chrominance after hot water washing is relatively low. According to the method, the dyeing rate and color fixing rate of the natural mineral dye are improved by a dispersant, damage to the fibers in the dyeing process is lowered, and the gloss and softness of the denim are improved.

Description

technical field [0001] The invention belongs to the technical field of fabric processing, and in particular relates to a method for continuous dyeing of denim. Background technique [0002] Denim clothing can be worn in all seasons. At first, it was only used as wear-resistant work clothes. After a long process, the denim work clothes of that year have become the new favorite of today's fashion, symbolizing youth and vitality, and becoming enduring. popular theme. Classic denim (traditional denim) refers to a coarse twill weave made of pure cotton yarn dyed with indigo and natural color yarn as weft. Most warp dyeing of denim is mainly based on indigo dye. Leuco indigo has a very low affinity to the fiber, and it is not easy to dye deep color; at the same time, the migration property is poor, and most of them are ring dyed (white) when used for yarn dyeing. core); therefore, denim garments can obtain uniform or partial peeling effect after stone washing or monkey washing, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P1/34D06P1/00D06P1/44D06P1/46D06P3/60D06P5/00D06P5/02D06P5/10C08H7/00
CPCD06P1/34D06P1/0076D06P1/445D06P1/46D06P3/60D06P5/02D06P5/10D06P5/002C08H6/00
Inventor 李朝阳
Owner 邢台恒进纺织有限公司
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