A rapid alkali-free scouring, bleaching, cleaning, dyeing and finishing process for cotton knitting

Abstract

The invention provides a rapid non-alkali scouring and bleaching, cleaning, dyeing and finishing process for a cotton knitted fabric. The process is characterized by comprising the following steps: scouring and bleaching; deoxidizing; washing with water; and dyeing, wherein scouring and bleaching are carried out under a faintly acid or neutral condition; hydrogen peroxide is activated through an activating agent. With the adoption of the process, a plurality of water washing and neutralizing processes can be saved; the processes are decreased; water can be saved; the wastewater pollution degree is particularly greatly reduced; the COD is reduced by more than 10 times that of the traditional process; the process is particularly suitable for preprocessing of high-count, high-density, thick and heavy pure cotton knitted fabrics; the clean production process is completely met; the process is worthy of popularization.

Description

technical field

[0001] The invention relates to a dyeing and finishing process, in particular to a fast non-alkali scouring, bleaching and cleaning dyeing and finishing process for cotton knitting. Background technique

[0002] At present, a large amount of alkali agents are used in the dyeing and finishing process of cotton fibers, yarns, and fabrics. The traditional process: the pre-treatment of cotton uses hydrogen peroxide plus alkali agents and surfactants for scouring and bleaching. These alkali agents include soda ash (Na 2 CO 3 ), caustic soda (NaOH), baking soda (NaHCO 3 ).

[0003] However, the use of a large amount of alkali will cause serious pollution to the environment, and it will cost a lot for alkali neutralization, and it will be degraded at a huge cost to the natural environment.

[0004] In addition, in order to ensure the effect of scouring and bleaching, it needs to be subjected to high temperature for a long time. After scouring and bleaching, a la...

Examples

Embodiment 1

[0051] 1. Fabric: 20STK double yarn + 40STK / 1 double sided fabric

[0052] 2. Formula and conditions of rapid non-alkali scouring and bleaching process:

[0053]

[0054] A. The bath ratio of scouring and bleaching: 1:10, set the water level into the cloth. Add 0.6g / L of Deyouling DM-1130, 4.0g / L of CHT activator FBA and CHT buffer FBA respectively at room temperature, first pour into the auxiliary tank and stir evenly, then add slowly;

[0055] B. High temperature scouring and bleaching: run for 6 minutes after adding the additives used, slowly add 35% hydrogen peroxide 10.0g / L, run for 3 minutes at 2°C per minute to 90°C, keep warm for 40 minutes, and cool to 70°C at 3°C ​​per minute, direct drainage;

[0056] C. Deoxygenation: Warm up to 40°C, add 0.5g / L deoxygenase KAT, keep warm for 10 minutes, drain directly after keeping warm, wash once, and dye;

[0057] D. Precautions: The same amount of CHT activator FBA and CHT buffer FBA can be used in the bleaching bath to a...

Embodiment 2

[0065] 1. Fabric: 32STK / 1SZ+10S / C right twill non-pull fleece

[0066] 2. Formula and conditions of rapid non-alkali scouring and bleaching process:

[0067]

[0068] A. The bath ratio of scouring and bleaching: 1:15, set the water level into the cloth. Add 0.4g / L of Deyouling DM-1130, 2.5g / L of CHT activator FBA and CHT buffer FBA respectively at room temperature, first pour into the auxiliary tank and stir evenly, then add slowly;

[0069] B. High temperature scouring and bleaching: run for 6 minutes after adding the additives used, slowly add 35% hydrogen peroxide 8.0g / L, run for 3 minutes at 2°C per minute to 90°C, keep warm for 30 minutes, and cool to 70°C at 3°C ​​per minute, direct drainage;

[0070] C. Deoxygenation: Warm up to 40°C, add 0.3g / L deoxygenase KAT, keep warm for 10 minutes, drain directly after keeping warm, wash once, and dye;

[0071] D. Precautions: The same amount of CHT activator FBA and CHT buffer FBA can be used in the bleaching bath to achiev...

technical field

[0001] The invention relates to a dyeing and finishing process, in particular to a fast non-alkali scouring, bleaching and cleaning dyeing and finishing process for cotton knitting. Background technique

[0002] At present, a large amount of alkali agents are used in the dyeing and finishing process of cotton fibers, yarns, and fabrics. The traditional process: the pre-treatment of cotton uses hydrogen peroxide plus alkali agents and surfactants for scouring and bleaching. These alkali agents include soda ash (Na 2 CO 3 ), caustic soda (NaOH), baking soda (NaHCO 3 ).

[0003] However, the use of a large amount of alkali will cause serious pollution to the environment, and it will cost a lot for alkali neutralization, and it will be degraded at a huge cost to the natural environment.

[0004] In addition, in order to ensure the effect of scouring and bleaching, it needs to be subjected to high temperature for a long time. After scouring and bleaching, a la...

Examples

Embodiment 1

[0051] 1. Fabric: 20STK double yarn + 40STK / 1 double sided fabric

[0052] 2. Formula and conditions of rapid non-alkali scouring and bleaching process:

[0053]

[0054] A. The bath ratio of scouring and bleaching: 1:10, set the water level into the cloth. Add 0.6g / L of Deyouling DM-1130, 4.0g / L of CHT activator FBA and CHT buffer FBA respectively at room temperature, first pour into the auxiliary tank and stir evenly, then add slowly;

[0055] B. High temperature scouring and bleaching: run for 6 minutes after adding the additives used, slowly add 35% hydrogen peroxide 10.0g / L, run for 3 minutes at 2°C per minute to 90°C, keep warm for 40 minutes, and cool to 70°C at 3°C ​​per minute, direct drainage;

[0056] C. Deoxygenation: Warm up to 40°C, add 0.5g / L deoxygenase KAT, keep warm for 10 minutes, drain directly after keeping warm, wash once, and dye;

[0057] D. Precautions: The same amount of CHT activator FBA and CHT buffer FBA can be used in the bleaching bath to a...

Embodiment 2

[0065] 1. Fabric: 32STK / 1SZ+10S / C right twill non-pull fleece

[0066] 2. Formula and conditions of rapid non-alkali scouring and bleaching process:

[0067]

[0068] A. The bath ratio of scouring and bleaching: 1:15, set the water level into the cloth. Add 0.4g / L of Deyouling DM-1130, 2.5g / L of CHT activator FBA and CHT buffer FBA respectively at room temperature, first pour into the auxiliary tank and stir evenly, then add slowly;

[0069] B. High temperature scouring and bleaching: run for 6 minutes after adding the additives used, slowly add 35% hydrogen peroxide 8.0g / L, run for 3 minutes at 2°C per minute to 90°C, keep warm for 30 minutes, and cool to 70°C at 3°C ​​per minute, direct drainage;

[0070] C. Deoxygenation: Warm up to 40°C, add 0.3g / L deoxygenase KAT, keep warm for 10 minutes, drain directly after keeping warm, wash once, and dye;

[0071] D. Precautions: The same amount of CHT activator FBA and CHT buffer FBA can be used in the bleaching bath to achiev...

Images