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Dyeing method for suspension cotton yarn by reduced dye

A dyeing method and suspension technology, applied in the field of dyeing and finishing, can solve the problems of fast reduction rate, large dye selectivity, complicated operation, etc., and achieve the effects of simplifying the different limitations of the process, simple dyeing operation, and mild reduction rate.

Inactive Publication Date: 2017-12-15
XINJIANG RUYI TEXTILE GARMENT CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its existing problems: complex operation, high selectivity to dyes, limited by dye uptake rate, high dyeing temperature and reduction temperature, one-time high-temperature addition of NaOH and sodium hydrosulfite reduction rate is faster, easy to produce quality problems, not Adapt to some light, medium and dark color dyeing
Dyeing prescription and dyeing process cannot be well matched, making it difficult to control the dyeing process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: a kind of vat dye suspension cotton yarn dyeing method, it is characterized in that comprising the following steps: package yarn loosening, after loosening, the package weight of a single tube is 0.8kg, and the package density is 0.39 / cm 3 Afterwards, put the cheese after loosening into the dyeing vat, add water to the bath ratio of 1:10, that is, add 10 parts by weight of water to the cheese of 1 part by weight, and run at room temperature for 8 minutes, according to the added water amount of 2g / L. Add refining agent in proportion, after 9 minutes of operation, add liquid caustic soda according to the proportion of 4g / L water added, the concentration of liquid caustic soda is 45%, after 10 minutes of operation, heat up to 60℃ at a speed of 2℃ / min, then Add hydrogen peroxide at a ratio of 8g / L. After running for 11 minutes, heat up to 110°C at a rate of 1°C / min. After running at a constant temperature for 20 minutes, drain the liquid and wash it with hot wa...

Embodiment 2

[0019] Embodiment 2: a kind of vat dye suspension cotton yarn dyeing method, it is characterized in that comprising the following steps: package yarn loosening, after loosening, the weight of a single package is 1kg, and the package density is 0.37 / cm 3 ; Afterwards, put the cheese after loosening into the dyeing vat, add water to a bath ratio of 1:6, that is, add 6 parts by weight of water to 1 part by weight of cheese, run at room temperature for 11 minutes, and add water according to the amount of 1.4g / L After 1 minute of operation, add liquid caustic soda according to the proportion of 5g / L water added, the concentration of liquid caustic soda is 41%, after 12 minutes of operation, heat up to 60℃ at a speed of 1℃ / min, then Add hydrogen peroxide at a ratio of 6g / L. After running for 13 minutes, raise the temperature to 110°C at a rate of 3°C / min. After running at a constant temperature for 15 minutes, drain the liquid and wash it with hot water at 82°C for 12 minutes. Wash ...

Embodiment 3

[0020] Embodiment 3: A method for dyeing cotton yarn with a vat dye suspension, characterized in that it comprises the following steps: the package is loosened, after the package is loosened, the weight of a single package is 0.9kg, and the package density is 0.35 / cm 3 ; Afterwards, put the cheese after loosening into the dye vat, add water to a bath ratio of 1:7, that is, add 7 parts by weight of water to 1 part by weight of cheese, and run it at room temperature for 8 minutes, according to the added water amount of 1g / L. Add refining agent in proportion, after 9 minutes of operation, add liquid caustic soda according to the proportion of 5g / L water added, the concentration of liquid caustic soda is 43%, after 10 minutes of operation, heat up to 64℃ at a speed of 2℃ / min, then Add hydrogen peroxide at a ratio of 7g / L. After running for 11 minutes, heat up to 110°C at a rate of 2°C / min. After running at a constant temperature for 25 minutes, drain the liquid and wash it with hot...

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Abstract

The invention discloses a dyeing method for suspension cotton yarn by reduced dye. The dyeing method comprises the following steps: slacking, pretreatment, and dyeing. The bath ratio in the pretreatment step is 1:(6 to 10), and the bath ratio in the dyeing step is 1:(6 to 10). The dyeing method comprises the following specific steps: adding a reefing agent for operating, then adding alkali for operating, raising the temperature, adding hydrogen peroxide for operating, and carrying out acid pickling and water washing; operating for a period of time, then sequentially adding a dye leveler, sodium hydroxide and sodium dithionite, and then raising the temperature for operating; draining, adding water again, and then adding the hydrogen peroxide for operating; adding a soaping agent, and finally draining liquid to obtain dyed cone yarns. The method has the advantages of simple steps, simple dyeing operation, high production efficiency and good dyeing effect.

Description

technical field [0001] The patent of the invention belongs to the field of dyeing and finishing, and specifically relates to a method for dyeing cotton yarn with a suspension using a vat dye to impregnate cotton yarn. Background technique [0002] The so-called suspension dyeing method is that the suspension solution made of ultrafine powder of vat dyes is directly dipped on the fabric, and then through the reducing solution, the dye is reduced to a leuco body under the condition of a reducing agent and is absorbed by the fiber. Dyeing method for dyeing. [0003] Dyeing of cheese, warp beam and loose cotton is an important part of yarn-dyed weaving. In order to further improve the chlorine bleaching resistance and dyeing fastness of the yarn-dyed fabric after finishing and the customer's physical and chemical finishing during the wearing process, vat dyes are generally used in the yarn-dyed industry. There are two conventional methods for vat dye dyeing, one is cryptostain...

Claims

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Application Information

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IPC IPC(8): D06P3/60D06P1/22D06P1/00D06M11/38D06M11/50D06M101/06
CPCD06P3/6025D06M11/38D06M11/50D06M2101/06D06P1/0032D06P1/22
Inventor 韦节彬张佐平田健刘坤朋李华陈超张庆娟禹辉杨莉
Owner XINJIANG RUYI TEXTILE GARMENT CO LTD
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