I believe you also have a certain understanding of potassium hydroxide. Although it has certain toxicity, it also plays a great role in many industries. Among them, it has the general property of alkali. Today, I mainly share with you its application in the dyeing industry.
1. The slow coloring of soda ash is due to the reduction of the rate of color streaks caused by excessive alkali addition. Especially for relatively sensitive colors, it can not only shorten the alkali addition time, but also greatly reduce many defects such as color streaks in dyeing, improve product quality and reduce repair, so as to save costs. If potassium hydroxide is used to replace soda ash for fixation, even if 1 / 10 of sodium hydroxide is used to replace soda ash, enough color supply can be guaranteed. If excessive amount of this product is added in the process of operation, the color of the fiber will not be affected.
2. Due to less use of fixing alkali, it is easy to clean after dyeing, which greatly reduces the white spots caused by unclean washing like alkali after dyeing, and has better warm rubbing fastness and washing fastness than soda ash.
3. After dyeing, the washing times are reduced, the "pickling" to make the fiber neutral is saved, the process time is shortened and the cost is reduced.
4. Due to the elimination of nearly ten times of soda ash and several times of water washing, and the low COD value of dyeing residue, the treatment load of dyeing wastewater is reduced, the environmental pollution is reduced, and favorable conditions are created for the expansion of the factory.
Potassium hydroxide is also suitable for all kinds of reactive dyes, so it has strong adaptability, high brightness and reproducibility, so it is an excellent dyeing material, especially in low bath ratio and aerosol dyeing machine. You can try it.