Method of using vat dye to dye yarns

A technology for dyeing and dyeing yarn, which is applied in the field of dyeing yarn with vat dyes, which can solve the problems of easy to produce color spots, cumbersome operation, yarn color spots, etc., and achieve the effect of bright color, uniform color and uniform color development

Active Publication Date: 2019-04-02
GUANGDONG ESQUEL TEXTILES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is cumbersome to operate, and it is easy to produce color flowers, so vat dyes are generally only used in dyeing cloth at present.
Many domestic textile enterprises have tried to apply vat dyes to dyeing yarns (such as bobbins and warp yarns of woven fabrics), but due to the serious problem of yarn coloring, there is no successful precedent.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] This embodiment is a method for dyeing yarn with vat dyes. In a dyeing vat with a diameter of 1800MM, a cylinder of 50S pure cotton cheese is cast and dyed. The cheese is a regular cylinder, and the density of the cheese in the same cylinder is basically the same. 0.37g / cm 3 , The bath ratio is 1:7.3, and the vat dye formula is: Shihlin Brilliant Green 0.0095% OWF, Shihlin Blue 0.326% OWF.

[0043] Proceed as follows:

[0044] 1. Pretreatment: After the bobbin is put into the vat, the main vat is filled with water, adding 0.9g / L scouring agent, 0.8g / L chelating dispersant, 0.8g / L hydrogen peroxide stabilizer, 3.0g / L 50% liquid caustic soda, 27.5 %H 2 o 2 4.5g / L, heat up to 110°C for 30 minutes; drain, then add water, add HAC 0.8g / L for pickling, and treat at room temperature for 5 minutes; drain, then add water, add 0.15g / L enzyme water to deoxygenate, and treat at room temperature for 5 minutes; drained, to be dyed;

[0045] 2. Dyeing—reduction: after the pretreat...

Embodiment 2

[0050] This embodiment is a method for dyeing yarn with vat dyes. In a dyeing vat with a diameter of 1400MM, a vat of 40S pure cotton warp beam is cast and dyed, and the shaft surface is smooth, the yarn weight is 213.15KG, and the axial density is 0.47g / cm 3 , The bath ratio is 1:11.59, and the vat dye formula is: Shihlin Blue 0.0036% OWF, Shihlin Olive Green 0.205% OWF, Shihlin Purple 0.073% OWF.

[0051] Proceed as follows:

[0052] 1. Pre-treatment: After the warp yarn is put into the vat, the main vat is filled with water, adding 0.9g / L scouring agent, 0.8g / L chelating dispersant, 0.8g / L hydrogen peroxide stabilizer, 3.0g / L 50% liquid caustic soda, 27.5%H 2 o 2 4.5g / L, heat up to 110°C for 30 minutes; drain, then add water, add HAC 0.8g / L for pickling, and treat at room temperature for 5 minutes; drain, then add water, add 0.15g / L enzyme water to deoxygenate, and treat at room temperature for 5 minutes; drained, to be dyed;

[0053] 2. Dyeing——reduction: after the pre...

Embodiment 3

[0058] A kind of vat dye yarn dyeing method of present embodiment, its raw material and steps are the same as embodiment 1, difference is:

[0059] Step 2 Dyeing——In reduction, adjust the pump speed to 1160 rpm;

[0060] Step 3 Dyeing - during oxidation, reduce the pump speed to 580 rpm;

[0061] In step 4 aftertreatment, adjust the pump speed to 1450 rpm.

[0062] The inner and outer color difference of the package yarn dyed by the above method: Delta E 0.49, colorless, no package. There is no feedback on the quality of internal and external differences in subsequent processing and use procedures; in terms of color fastness: light fastness, water fastness, perspiration fastness, washing fastness, and chlorine bleaching fastness all reach 4-5 grades (ISO, 5 grades) rating method).

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Abstract

The invention relates to a method of using a vat dye to dye yarns. The method includes the steps of pretreating yarns; reducing, to be specific, adding water to the pretreated yarns, controlling pumping speed of a vat to 1160-1450 r / m, adding a vat dye, and adding an alkali and a reducing agent to carry out reducing reaction; oxidizing, to be specific, decreasing the pumping speed to 580-1015 r / mafter the reducing reaction is over, and adding an oxidant to carry out oxidation reaction; post-treating the yarns subjected to oxidation reaction. The method herein helps effectively solve the problems of dyeing defects and inner and outer color differences in the application of a vat dye in yarn dyeing; the yarns dyed have uniform and bright color and are high in soaping fastness and light fastness.

Description

technical field [0001] The invention relates to the technical field of textiles, in particular to a method for dyeing yarn with vat dyes. Background technique [0002] Vat dyes are dyes with excellent properties in dyes. According to its main chemical structure, it can be divided into two categories: indigo and anthraquinone. It has a relatively complete chromatogram, bright color, and high fastness to soaping and sunlight. The dyeing process is as follows: first, it becomes a soluble leuco-salt through reduction in lye, which is adsorbed by the cellulose fiber, and then oxidized to return to the original insoluble dye. [0003] Traditional vat dyeing generally adopts the "dry vat method (pre-reduction method)", that is, vat dyes are first reduced, and then added to the dye vat for dyeing. This method is cumbersome to operate and is prone to color flowers, so vat dyes are generally only applied to dyed cloth at present. Many domestic textile enterprises try to apply vat ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P3/60D06P1/22
CPCD06P1/22D06P1/222D06P3/6025
Inventor 黎娟何韵湘安志轩陈晓霓吴海彬
Owner GUANGDONG ESQUEL TEXTILES CO LTD
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