Cold pad batch processing method of cotton fibers through pre-treatment dyeing one-bath method
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A technology of pre-treatment dyeing and processing method, which is applied in the technical field of pre-treatment dyeing and treatment of cotton and loose fibers in the same bath, can solve the problems of low production efficiency, high water and energy consumption, affecting spinning, etc. The effect of less energy consumption and water saving and resource saving
Inactive Publication Date: 2017-02-01
DONGHUA UNIV
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However, if the raw cotton loose fiber is directly dyed, because the raw cotton itself contains fiber companions, the wettability is poor, and the permeability of the dye is not good during dyeing, which affects the dyeing of the dye, and the color is not deep and the color fixation rate is not high.
If the raw cotton loose fiber is subjected to conventional pretreatment first, and then conventional dipping dyeing is carried out, the loose cotton fiber will be damaged in strength, elasticity will decrease under high temperature, and the hand feeling will be bad, which will affect the subsequent spinning and other work, and the production efficiency will be low. High water and energy consumption, not in line with the development direction of energy conservation and emission reduction
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Embodiment 1
[0027] A cold pad-batch processing method for cotton fibers by pretreatment dyeing in the same bath method, the specific steps are:
[0028] Weigh 2g of raw cotton loose fiber after carding, and pad it in the dipping solution, and impregnate it twice for 10 minutes. Put it in place for 12 hours, first wash with hot water at 70-80°C, soap wash (commercial grade soaping agent 2g / L, bath ratio 1:20, temperature 95°C, time 10min), then wash with cold water, dry at 80-95°C to obtain dyed Cotton fiber.
[0029] The formula of described dipping solution is: reactive black KN-B (two active radicals) 40g / L, urea 50g / L, sodium sulfate 30g / L, refining penetrating agent JFC 4g / L, alkaline pectinase 2g / L L, caustic soda 3g / L, sodium silicate 15g / L. When preparing, add water successively to mix at room temperature, and stir evenly.
Embodiment 2
[0031] A cold pad-batch processing method for cotton fibers by pretreatment dyeing in the same bath method, the specific steps are:
[0032] Weigh 2g of raw cotton loose fiber after carding, and pad it in the dipping solution, and impregnate it twice for 10 minutes. Put it in place for 12 hours, first wash with hot water at 70-80°C, soap wash (commercial grade soaping agent 2g / L, bath ratio 1:20, temperature 95°C, time 10min), then wash with cold water, dry at 80-95°C to obtain dyed Cotton fiber.
[0033] The formula of the impregnation solution is: reactive brilliant blue KN-R 20g / L, urea 50g / L, sodium sulfate 30g / L, refining penetrant JFC 4g / L, alkaline pectinase 2g / L, soda ash 2g / L, Sodium silicate 10g / L. When preparing, add water successively to mix at room temperature, and stir evenly.
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Abstract
The invention provides a cold pad batch processing method of cotton fibers through a pre-treatment dyeing one-bath method. The cold pad batch processing method is characterized by comprising: padding raw cotton loose fibers into impregnation liquid; after padding, stacking at a room temperature for 8h to 20h; washing with hot water at 70 DEG C to 80 DEG C and soaping; washing with cold water and drying, wherein the impregnation liquid contains 10g/L to 80g/L of an active dyestuff, 3g/L to 5g/L of a pre-treatment auxiliary agent, 30g/L to 100g/L of a co-solvent, 5g/L to 18g/L of an alkali agent and 20g/L to 50g/ of sodium sulfate, and the alkali agent is one or a compound of more of sodium silicate, sodium carbonate, sodium phosphate and sodium hydroxide. A cold pad batch treatment process provided by the invention is carried out at a room temperature, a formula is simple and the operation is convenient; raw cotton does not need to be independently pre-treated; the auxiliary agent is added and pre-treatment and dyeing can be carried out in one bath, so that the cost is reduced; damage to the fibers is small and the hand feeling is good; the utilization rate of the dyestuff is high, less sewage is discharged, and energy saving and emission reduction are realized.
Description
technical field [0001] The invention belongs to the field of cotton loose fiber dyeing, in particular to a process for pretreatment and dyeing of cotton loose fiber in the same bath. Background technique [0002] Pure cotton color spun yarn is made of two or more kinds of dyed cotton fibers through full mixing, drafting and twisting. The processing method of "loose fiber dyeing first, then mixed color spinning" breaks through the traditional yarn For the defects of single color, innovatively develop a single yarn style with unique mixed color effect, with high technical content. However, if the raw cotton loose fiber is directly dyed, because the raw cotton itself contains fiber companions, the wettability is poor, and the permeability of the dye is not good during dyeing, which affects the dyeing of the dye, and the color is not deep and the color fixation rate is not high. . If the raw cotton loose fiber is subjected to conventional pretreatment first, and then conventio...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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