Latest News and Updates on Textile Auxiliaries and Dyes

Reactive dye molecules contain active groups, which can be covalently bonded with carboxyl, amino and hydroxyl groups on fibers, and can be used for fiber dyeing such as cellulose fibers, protein fibers and nylon. There are also some unsatisfactory aspects of reactive dyes, such as the fact that the Read More

The solubility of reactive dyes can be roughly divided into four categories:Class A, dyes containing diethylsulfone sulfate (ie vinylsulfone) and three reactive groups (monochloro-s-triazine + divinylsulfone) have the highest solubility, such as Yuanqing B, Tibetan blue GG, Tibetan blue RGB, golden Read More

Reactive dyes have a very good dissolution state in water. Reactive dyes mainly rely on the sulfonic acid group on the dye molecule to dissolve in water. -Ethylsulfonyl sulfate is also a very good solubilizing group.In the aqueous solution, the sodium ion on the sulfonic acid group and the -ethylsul Read More

Cotton fiber belongs to natural cellulose fiber. Cotton fabric has soft hand feel, good moisture absorption and air permeability and excellent wearing performance. As people pay more and more attention to wearing health and advocating nature, cotton fabric is loved by people. Reactive dyes are one o Read More

1 Choose the right dyeThe color fastness is closely related to the structure of the dye, and the selection of the dye should consider:① Strong reactivity between dyes and fibers;②High fixation rate;③It has better acid-base stability;④ The bond energy of the covalent bond of the dye-fiber is high, th Read More

Reactive dyes mainly include s-triazine and vinyl sulfone types, especially vinyl sulfone type dyes, when encountering alkali, the solubility decreases and the reactivity increases sharply. . Brilliant blue KN-R is easy to aggregate and has poor solubility. Especially after adding Yuanming powder, i Read More

Chlorine gas is generally used as a disinfectant in tap water. Therefore, when washing clothes or swimming, the dyes in the clothes will react with a small amount of effective chlorine remaining in the tap water to degrade the dyes, resulting in changes in the color of the clothes. Dyes that are eas Read More

Reactive dyes have a wide chromatogram, bright color, excellent performance and strong applicability, and their hue and performance are basically in line with the market's requirements for fibers and clothing. Reactive dyes can achieve high levels of fastness properties, especially wet fastness, wit Read More

1. Solubility High-quality reactive dyes have good water solubility in commercial applications. The solubility and the concentration of the dye solution are related to the selected bath ratio, the amount of electrolyte added, the dyeing temperature and the amount of urea and other factors. The react Read More

Intermediate temperature reactive dyes have the problem of "unevenness", which is prone to dyeing defects such as color spots, chromatic aberrations, and stains. This is because there are two major defects in the dyeing performance of moderate temperature reactive dyes:①The stability of salt and alk Read More

Reactive dyes are used for cellulose fiber dyes, generally through three stages of adsorption, diffusion and fixation:There is no covalent bond reaction between the dye and the fiber during the adsorption and diffusion process. When the alkali agent is added to make the pH of the dye bath alkaline, Read More

For the dyeing of cellulose fibers, the proportion of reactive dyes is currently the largest. Reactive dyes are water-soluble dyes containing reactive groups that can chemically combine with macromolecules such as cotton, wool and silk, so the soaping and rubbing of dyed fabrics The fastness is very Read More