Yarn dyeing method for reduced dye
A technology for dyeing and dyeing yarn, applied in the direction of dyeing method, textile and papermaking, fiber processing, etc., can solve the problems of easy to produce color pattern, complicated operation, yarn color pattern, etc., and achieve bright color, complicated operation and uniform color. Effect
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Embodiment 1
[0039] 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.
[0040] Proceed as follows:
[0041] 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 24.5g / 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;
[0042] 2. Dyeing—reduction: after the pretreatm...
Embodiment 2
[0047] 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.
[0048] Proceed as follows:
[0049] 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;
[0050] 2. Dyeing—reduction: after the pret...
Embodiment 3
[0055] A method for dyeing yarn with vat dyes in this embodiment, its raw materials and steps are the same as in Example 1, the difference is that step 3 dyeing—the oxidation process is as follows:
[0056] Cool down the main vat to 50°C, run for 15 minutes, reduce the pump speed to the requirement, return the dye solution to the material vat in the main vat, test the foot water with yellow test paper, make sure the yellow test paper turns blue, then add dispersant 1.0g / L and weak oxidant 2.0g / L, after a little stirring, pump it into the main vat, run at 50°C for 15 minutes, then reflux, add hydrogen peroxide 2.0g / L, then pump it into the main vat, continue to run at 50°C for 15 minutes, and drain.
[0057] The inside and outside color difference of the package yarn dyed by the above method: Delta E 0.57, colorless, no tube picking. There is no feedback on the quality of internal and external differences in subsequent processing and use procedures; in terms of color fastness: ...
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