The dyeing of cellulose requires dyes that are in a water soluble form due to the hydrophilic nature of the cellulosic fibres. But due to anionic dye and fibre repulsion as discussed earlier, the dyeing method requires the presence of electrolytes which suppress negative charge build-up at the fibre surface and promotes increased dye adsorption. An alternative approach to improving dyeability of cellulose with anionic dyes could be achieved by incorporating cationic groups into the cellulose structure.
Cationic dye ranges are not yet practically used for the dyeing of cellulosic fibre, even though they offer the possibility of a salt-free dyeing process with high tinctorial strength at relatively low levels of dye application. By considering localised cationic dyes where quaternary ammonium groups attach to the chromophore via an aliphatic spacer linkage, it is speculated that removal of these quaternary ammonium groups after the dyeing process may be possible without causing a significant shift in colour hue. The long alkyl chain quaternary ammonium salts (QAS) structures are incorporated into reactive dyes as both water-soluble and cellulosic fiber interactive groups.
The QAS are water soluble and more importantly carries positive charge in water, which will increase dye interaction with negatively charged cellulosic surfaces. Thus, the reactive dye molecule can assist dye exhaustion onto cellulosic fibers without using salts and possibly increase reactivity between the cellulose and the dye. This consequently reduces potential hydrolysis of the reactive dyes and the dyed cotton exhibits good color washfastness .
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MANUFACTURING PROCESS OF CATIONIC DYE FIXATOR is not very complicated. For the production, there is need usable and tried a formulation, raw materials and mixing tank. For raw materials to be used, quantities to be used and ingredients usage rankings, you should look into this formulation. Therefore, formulation and productıon methods of dyes fixator are important. If you have not a good formulation, you cannot make healthy and efficient production of any dyes cationic fixator in textile chemicals.
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