When mentioning rhodamine B dye, I believe many people don’t know it very well. In fact, as basic dyes, it is closely related to our life. It exists in the paper we use and the clothes we wear. It is a kind of solid substance with the appearance of green powder. After diluting it with solution, it can be dyed. We will introduce the dyeing method of Rhodamine B dye to you.
1. Dyeing method of controlling temperature with different retarders
Different retarders can achieve the goal of uniform coloring of acrylic fiber by prolonging the heating time properly, and the temperature must be strictly controlled during dyeing. This method is suitable for the dyeing of loose fiber and rope like matching with large bath, and the dyeing of wool / nitrile blended yarn. The dye in the dye bath is absorbed gradually with the increase of temperature, which is convenient for acid dye and alkaline dye softener in the same bath. Since the temperature must be accurately controlled in the dyeing process, the production equipment shall be automatically controlled by temperature program.
2.Dyeing method with retarder
The basic rhodamine b retarder is used to block the acid groups on the acrylic fiber. The amount of retarder can make the acrylic fiber reach the appropriate saturation degree, hinder the absorption of cationic dyes, and even the dyes with fast coloring and poor migration can also reach the effect of leveling. This dyeing method is applicable to all kinds of acrylic fiber products. The properties of cationic retarder should be compatible with the K value of the dye, and the sodium chloride has no retarded effect on the dye with low k value.
3. Dyeing method of dye auxiliaries
In the dye bath, a proper amount of anionic dispersant N and levelling agent o can change the ionization state of cationic dyes, temporarily lose the charge attraction to acrylic fibers, or directly use disperse cationic dyes. This method can be used to dye the wool nitrile blended products in the same bath with acid dyes, or to dye the polyester nitrile blended products in the same bath with disperse dyes.
This article is from sulphur black dyes and basic violet 10 manufacturer. Any more information needed, welcome contact with us.
Contact person: Miss Jessie Geng
Post time: Mar-03-2020