Mar 12, 2021 · Properties or Characteristics of reactive dye: Reactive dyes are anionic dyes, which are used for dyeing cellulose, protein and polyamide fibres. Reactive dyes are found in power, liquid and print paste form. During dyeing the reactive group of this dye forms covalent bond with fibre polymer and becomes an integral parts of the fibre.

May 11, 2015 · Here I have discussed 17 types of reactive dyes with properties, structures, influencing factors like, temperatures, solubility, and fixation process. 1. Monochlorotriazine: Good Substantively for the Fibers. High Degree of Fixation Efficiency. Structure: Properties: Reaction can take place in more energetic reaction conditions. Temperature:

In a reactive dye, a chromophore (an atom or group whose presence is responsible for the colour of a compound) contains a substituent that reacts with the substrate. Reactive dyes have good fastness properties owing to the covalent bonding that occurs during dyeing.

Jan 18, 2025 · Reactive dyes are the most popular class of synthetic dyes used in the dyeing and printing industries due to their wide range of shades, high fastness, and diversity in application. There are...

Reactive dye is the dye that can react with a fibre to form a covalent link, that is forming a permanent attachment in the fibre and could not be removed by repeated treatment with boiling water under neutral conditions. Consequently, the dyes become parts of the fibre, leading to outstanding colour fastness to wash.

Jun 3, 2024 · Reactive dye contains a reactive group, which makes the covalent bond with fiber & becomes part of the fiber. General formula: D-X-Y Here, D= Chromophore, X= Bridge & Y= Functional group. Reactive dyes make covalent bond with fiber & partially hydrolysis in water: D-X-Y + Cell-OH → D-X-Y-O-Cell

In reactive dyes structure chromophores are responsible for color. These dyes also contain other two groups the bridging group and the soluble group. Through Bridging groups chromophore groups are with reactive terminals.

Jan 7, 2025 · Reactive dye is a class of dye that makes a covalent bond with the fiber and becomes an integral part of the fiber. These are usually used to dye cellulosic fibers such as cotton, rayon, or flax, but polyamide, wool, silk, and acetate fibers can …

Feb 18, 2012 · Reactive dyes are the only class of dyes that make a covalent bond with the fiber and become part of it. This can be described as: Reactive dyes + Fiber = Reactive dye-Fiber (Covalent bonding) If the general structure of a reactive dye is “R-B-X,” then. R-B-X + Fiber = R-B-X-Fiber (Dyed fiber) Here, Examples of reactive dyes:

Jul 12, 2024 · Molecular Structure and Reactive Groups: Reactive dyes comprise a chromophore (color-producing group) and a reactive group. The latter forms covalent bonds with fibers. Mechanisms of Reactive Dye-Fiber Bonding: Reactive dyes chemically bond with fibers, ensuring colors withstand washing and sunlight exposure.