Relationship between structure and application properties of acid dyes
The molecular structure of dyestuffs has a very close relationship with the application properties of dyestuffs on fibers, such as light resistance, wet treatment resistance (washing, soaping), shrinkage resistance, level dyeing performance and dyeing rate in the dyeing process, etc. Therefore, some laws between the molecular structure of dyestuffs and their application properties have been paid attention by dyestuff workers. Therefore, some laws between the molecular structure of dyestuffs and their application properties have been emphasized by dyestuff workers.
2023-11-21
Disperse dyes have small molecules, do not contain water-soluble groups in their structure, and are uniformly dispersed in the dye solution with the help of dispersants. It can dye polyester fibers, acetate fibers and polyamide fibers, and has become a special dye for polyester.
2023-11-21
What are the types of acid dyes
Acid dyestuffs are divided into strong acid, weak acid, acid mordant, acid complex dyestuffs and so on according to their chemical structure and dyeing conditions.1. Strong Acid Dyestuffs The earliest developed acid dyes are required to be dyed in a strong acidic dyeing bath, with simple molecular structure, low molecular weight, containing sulfonic acid or carboxylic acid group, not much affinity to wool, and can shift evenly on wool, dyeing evenly,
2023-11-21
Difference between acid dyes and basic dyes
Acid dyes are a class of water-soluble dyes with structural acidic groups that dye in acidic media. Most acid dyes contain sodium sulfonate, which is soluble in water, with bright colors and complete chromatograms. Acid dyes have a complete chromatogram, bright colors, light fastness and wet processing fastness vary greatly depending on the type of dye. Compared with direct dyes, acid dyes have a simple structure and lack long common double bonds and isohedral structure, so they lack directness to cellulose fibers and cannot be used for dyeing cellulose fibers.
2023-11-21
Suitable alkali agent for printing and dyeing
Dyeing and printing industry is a process of applying pigments or dyes to textiles. And in this process, lye is an integral part. Alkaline agent plays a very important role in printing and dyeing industry, it can adjust the pH value, promote the dissolution of pigment or dye, improve the brightness and uniformity of color, etc.. This article will introduce some suitable alkali agent for printing and dyeing.
2023-11-21
The difference between dyes and pigments
First, dyes are colored organic compounds that can dye dimensions or other substrates into a certain color. Most of them can be dissolved in water or organic solvents, and in the dyeing into a soluble state, for the transparent color liquid state, directly or through certain media substances and fibers and fibers to occur in the physical and chemical combination of coloring on the fiber, mainly with the object of the dyeing and printing.
2023-11-21
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