How to solve the problem of big pollution and unstable dyeing process of sulphur black dye?
Why do some companies use a large amount of sulphur black, but the use effect is not very good。In order to solve the serious polluting and unstable dyeing in the traditional sulphur black dyeing process, the composite reducing agent D was used as a sulphur black BR reducing agent to dye cotton yarns, and the dyeing performance and cleanliness of traditional alkali sodium were compared. The effects of mass concentrations of sulfur black BR, sodium hydroxide, composite reducing agent D, and dyeing temperature on the dyeing properties were analyzed. The experimental results show that under the conditions of mass concentrations of sulphur black BR 60 g/L, sodium hydroxide 20 g/L, composite reducing agent D 19 g/L, and dyeing temperature 95 ℃, the apparent color depth (K/S)value of the yarn is 46.88, the soaping fastness reaches 4-5, the dry rubbing fastness is 4 and the wet rubbing fastness is 2. The composite reducing agent D as a reducing agent is compared with the traditional sodium sulfide, and the K/S value of the yarn dyed with composite reducing agent D is better than that of with alkali sulfide process. The reducing sulfur element in the dyeing solution is reduced by 78.0%, and the chemical oxygen demand in the machine waste solution is reduced by 76.4%.
Therefore, in order to improve the dyeing effect and save costs in the process of using sulphur black dyeing, we need to know how to use complex reducing agents, environmentally friendly reducing agents and the use of methods can be called at any time to consult, we can provide better services.
Our company mainly produces Sulphur black, liquid Sulphur black, Perennial export to Bangladesh. India. Pakistan. Egypt, and Iran. Both the supply and the quality are particularly stable. More important is the price advantage.
Post time: Dec-07-2023