A kind of method for continuous dyeing of denim

A technology for denim and dyeing liquid, applied in the field of fabric processing, can solve the problems of unsuitability for mass production, low efficiency and high cost, and achieves the improvement of dyeing rate and color fixing rate, high K/S value, and convenient operation. Effect

Active Publication Date: 2021-12-14
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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  • A kind of method for continuous dyeing of denim
  • A kind of method for continuous dyeing of denim
  • A kind of method for continuous dyeing of denim

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A method of preparing a dispersant, comprising the steps of:

[0052] The weight ratio of 1: 1.5 is 1: 1.5 to add the calculinous mass concentration of 8 wt% aqueous sodium hydroxide, stir well, then warmed to 72 ° C, in the incubation of 10 min intraperitin weight 10% formaldehyde Continue to heat insulation 1.5h. Continue to 95 ° C, adding alkali weight of 10% absolute sodium sulfate, continued to heat insulation 1.5 h, cooled to normal temperature, slowly add 8.2% epoxypropylene chloropropane in ultrasonic mass weight, and stopped after 2 h Heating, using waste heat to evaporase epoxypropylene residual chloropropane, the pH of 9.0 during the reaction, to obtain a dispersant, the dispersant contains the compound of formula I,

[0053] Medium, x = ch 2 SO 3 Na, y = OCH 3 .

[0054] The infrared spectroscopy of alkali and dispersant is carried out on the Nicolet infrared spectrometer of the American thermo, the scan range is 4000-400cm -1 , Resolution 4cm -1 The mass rati...

Embodiment 2

[0056] A method of preparing a dispersant, comprising the steps of:

[0057] The weight ratio of 1: 1.5 is 1: 1.5 to add the calculinous mass concentration of 8 wt% aqueous sodium hydroxide, stir well, then warmed to 72 ° C, in the incubation of 10 min intraperitin weight 10% formaldehyde Continue to heat insulation 1.5h. Continue to heat up to 95 ° C, adding alkaline weight of 10% absolute sodium sulfate, continued to heat insulation 1.5 h, cool to normal temperature, slowly added 8.2% epoxypropylene chloride in the stirring state, and stop heating after 2 h The residual heat is evaporated to evaporase epoxy chloropropane of the remaining reactive reaction, and the pH is 9.0 during the reaction to obtain a dispersant.

Embodiment 3

[0059] A denim continuous dyeing method, denim contains cotton fibers, including the following steps:

[0060] Step: Press the bath ratio (denim: water) = 1: 100 (g / g) to place the cowboy in a solution containing 8 g / L penetrant JFC, 5g / L, calcined, pretreatment of 1 h at 80 ° C, then Wash 2 times, rinse to the pH of the rinse liquid is 7-7.5;

[0061] Step S2: Press the bath ratio (denim: water) = 1: 20 (g / g) to place the s2 step in a solution containing 30 g / lLINEX SURF Italian auxiliaries, modified at 40 ° C for 30 min;

[0062] S3 step: The dodensus method is used in dodder, and the dye containing 25 g / l TR / 0265 Italian natural color sand dye is dyed, the dyeing rate is 80%, the temperature is 50 ° C; dyed After the denim was 40 min at 60 ° C, 30 g / l LINEX SUP solution, followed by drying at a temperature of 90 ° C × 3 min.

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Abstract

The invention provides a method for continuous dyeing of denim, which belongs to the technical field of fabric processing. The denim contains cotton fibers. The method comprises the following steps: pretreating the denim with a solution containing a penetrating agent and caustic soda, and washing the denim for 2-3 times ; use dyeing auxiliaries solution to modify the denim obtained in step S1; adopt the method of double dipping and double rolling to dye the denim with the dyeing solution containing natural mineral dyes, fix the color, and dry. The invention realizes the continuous dyeing of denim with natural mineral dyes, and the obtained dyed denim has higher K / S value, good level dyeing and excellent color fastness to rubbing, and the chromaticity of the residual liquid after hot water washing is relatively low. Low. The method of the invention uses a dispersant to increase the dyeing rate and color fixation rate of natural mineral dyes, reduce the damage of fibers in the dyeing process, and improve the gloss and softness of denim.

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 Patents(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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