Reactive dyes are a type of dye used primarily for coloring textiles. They form a strong covalent bond with the fibers, resulting in vibrant colors that are highly resistant to washing and fading. This bonding process ensures that the dye becomes an integral part of the fiber, offering excellent color fastness and durability. Reactive dyes are versatile and can be used on a variety of natural fibers, such as cotton and wool, as well as on synthetic blends. They are also known for their environmentally friendly properties, as they generally require fewer chemicals in the dyeing process compared to other dye types.

Comprehensive Classification of Reactive Dyes: An Insight into Types, Reactivity Levels, and Their Specific Applications in Textile Dyeing Processes

Dyeing temperature is 50-70℃. The dyeing process is to first combine with the fiber by van der Waals hydrogen bond. Adding salt is to promote adsorption. At this time, the leveling and permeability are good. When the dyeing is close to equilibrium, add alkali. Under alkaline conditions, the β-hydroxyethyl sulfate active group in the dye will be transformed into a real vinyl sulfone group, and the activity will be greatly increased. It will be covalently bonded with the fiber to complete the color fixation and complete the dyeing process quickly. Whether it is a small sample or a large product, the best time to add alkali is after keeping it warm at 60 degrees for a period of time. The synchronization of the process of small samples and large products is the key to color reproducibility

Good solubility, bright color, high directness and high reactivity, suitable for cold pile dyeing.

Weak reactivity, suitable for high temperature (above 80℃) dyeing, insensitive to alkali, so not suitable for cold rolling, dye is not easy to hydrolyze, storage stability is good, "dye-fiber" covalent bond hydrolysis stability is very good, level dyeing is very good, suitable for viscose, towels, mercerized cotton dyeing and printing

Disadvantages: Since the acid generated by the hydrolysis of the chlorine atoms on the triazine has an autocatalytic hydrolysis effect on the bond, the acid resistance is very poor

This type has similar performance to monochlorotriazine, but have low directness, so they have good leveling properties and generally low strength, making them suitable for light colors and printing. Our TE series all have this structure

This type has the characteristics of two active groups, such as overcoming the disadvantage of poor acid resistance of the "dye-fiber" bond of s-triazine dyes, and at the same time overcoming the disadvantage of poor alkali resistance of vinyl sulfone dyes. They have synergistic effects, moderate reactivity, and are relatively cheap. Most dyeing factories use this set. Our special deep series are basically structurally modified on this basis, introducing multiple chromogens and active groups to increase the directness, depth, and lifting power of the dyes. The RGB series is based on the M material and further screens out varieties with similar compatibility, directness, and reactivity. Therefore, whether it is immersion dyeing of sensitive colors, or pad dyeing, cold rolling, RGB is very suitable.

Welcome to our state-of-the-art reactive dye factory, boasting an annual production capacity of 12,000 tons. Our facility is ISO certified, ensuring the highest standards of quality, safety, and environmental responsibility. With cutting-edge technology and advanced machinery, we produce top-quality dyes known for their exceptional color fastness and vibrant hues. Our commitment to sustainability and rigorous quality control processes guarantees that each batch meets the precise standards of our clients. Trust us for reliable, eco-friendly, and high-performance reactive dyes. Explore our range of products and discover why we are a leader in the dye industry.

At HANGZHOU TIANKUN CHEM CO., LTD., we pride ourselves on delivering superior dye solutions through stable quality, robust R&D, rich export experience, and exceptional local services. Here's what sets us apart:

Welcome to our state-of-the-art reactive dye factory, boasting an annual production capacity of 12,000 tons. Our facility is ISO certified, ensuring the highest standards of quality, safety, and environmental responsibility. With cutting-edge technology and advanced machinery, we produce top-quality dyes known for their exceptional color fastness and vibrant hues. Our commitment to sustainability and rigorous quality control processes guarantees that each batch meets the precise standards of our clients. Trust us for reliable, eco-friendly, and high-performance reactive dyes. Explore our range of products and discover why we are a leader in the dye industry.