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How to distinguish wool reactive dyes and acid dyes?

Views: 0     Author: Site Editor     Publish Time: 2023-04-18      Origin: Site


Learning Guide: Traditional acid dyes refer to water -soluble dyes containing acid groups, and the vast majority of acid groups contain sodium sulfonate exist on dye molecules. Only individual varieties are sodium carboxylic acid salt Forms exist. Early dyes were dyed under acidic conditions, so they were called acidic dyes.

Most of the acid dyes are sodium sodium -based salt of the aromatherapy in structure. In their hair color structure, nitrogen and pyrodia occupy a large proportion. Wait for all kinds of hair color. In various structures, nitrogen -oriented dyes accounted for the first place in terms of varieties and output, especially the most single or double nitrogen, including yellow, orange, red, Tibetan green, and black. The sun exposure has a good sunshine, and the color is also bright. It is mainly some purple, blue, and green dyes. Especially the blue is the most important. The acid dyes of some tadpoles can be increased in the dyeing of acid media dyes. Gorgeous effect. Sanfang methane is dominated by red, purple, blue, and green. Generally, the sun exposure is poor. Some gorgeous blue varieties are not oxygen -resistant, but the color is very strong and the wet treatment has better. The color and application performance of oxygenic acid dyes are similar to Sanfang methane. Generally, it is not used alone. It is mainly used for the color of acidic media dyes.

Classification of acidic dyes

The uniform dyeing and wetting treatment of acid dye varies with the dye structure. According to the dyeing performance of wool, acid dyes can be divided into three types of acidic dyes with strong acid baths, weak acid baths and neutral bath stains.

The dyeing of acid dyes on wool, silk, and nylon is better, but the wetting treatment has not consistent. Under normal circumstances, the uniformity of the dyeing nylon is poor, while the wetting treatment has better; the uniformity of the silk is better, but the wetting treatment fastness is inferior to the staining of wool. In production, the acidic dyes of strong acid bath staining are mainly used to dye wool, while the acidic dyes of weak acid baths and neutral bath staining can be used for the dyeing of silk and nylon in addition to dyeing wool

The female body of the hair color of the wool is the same chemical structure as the acid dye. Therefore, it reacts with the fiber in the same way in the same acid dye. After dyeing, you can obtain the wetness of nearly acidic dye dyeing, but it does not reach the moisture level of dyeing dye dyeing. Even wool fiber. The dyeing also varies according to the location. Therefore, the rapid response of dyes and fibers can cause problems such as small stains, which is a key problem for wool -active dye dyes. The active dye developed as a woolen dyeing was slow. Small stains and other problems that are not easy to occur. However, the recently introduced active dye that is described as an acid media dye alternative is suitable for the wool for cellulose fiber reaction group, which has a high response. Therefore, this problem should be paid attention to when designing a dyeing process. That is, the pH value adjustment and temperature of the dye bath should be controlled within the scope of the speed reaction of wool and dye. Add a certain dyeing agent to receive a certain dye effect. Like acidic dyes.

Active dyes are combined with wool fiber in an ion key. The uniformity is better. Generally, the fiber is used to react with the dye. After immersion, the fiber not only has a dye with a covalent bond, but also the dye wetness of dyes with a combination of ion bonds is not ideal enough. Therefore, after immersion treatment, alkaline soap washing is required. This process can promote the reaction of the dye absorbed by the fiber through the combination of covalent bonds to eliminate the reaction dye. If the ethylene -type active dye is dyed, it can be dyed according to the conditions shown. This condition is also suitable for dyeing dye dyeing dyeing dyeing dyes of ethylene 适/chlorine. Please boil and stain under the condition of weak acid at a pH of 5.

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