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Hydrophilic Energy Of Liquid Cationic Dyes

Sep 15, 2017

      The variety and quantity of disperse dyes used in polyester dyeing are developing faster. At present, most of the factory polyester dyeing using high-temperature high-pressure method, in the dyeing process prone to tar spots and color points, resulting in the quality of printing and dyeing products difficult to meet the requirements. Therefore, how to improve the stability of disperse dyes, especially the high-temperature stability performance, the application of disperse dyes has practical significance.Liquid Cationic Dyes

      There are no hydrophilic groups in the structure of disperse dyes, the water solubility is very low, the colloid dispersion system is in water, the dispersion stability is related to the structure of the dye itself, and the electrolyte, ions, especially surfactants in the dispersed medium are closely related. In aqueous solution, the dye single molecule, the grain, the dispersant and so on in the Micelle maintains the dynamic equilibrium, when the external condition such as the long time high temperature high pressure changes, this kind of balance may be destroyed, the dye condenses even precipitates, has the bad influence to the dyeing quality. Liquid Cationic Dyes

     Adding surfactant ml can quickly form micelles in water, which can help dissolve disperse dyes in water, and reduce or even prevent the crystal growth and grain condensation of disperse dye, and improve the dispersion stability.Liquid Cationic Dyes

     Acrylic dyeing with cationic dyes, in order to meet the high quality of dyeing products, in the mastery of fiber properties and dye performance, but also need to select the appropriate additives, so that dyeing production in the best process state. According to the surface activity classification, the role of dyeing auxiliaries in acrylic dyeing is as follows: Cationic surfactant: The surface activity is large, as a slow dye and stripping agent, the surface activity is small, as the dye and color spot repairing used auxiliaries.Liquid Cationic Dyes

     Anionic surfactant: The cationic charge of medium and dye is reformed into disperse cationic dye, and can be used as detergent for printing products after soaping. Non-ionic surfactant: As a stable dye bath for the prevention of precipitation agents and to prevent the emergence of color-difference auxiliaries. It is also used as scouring agent before acrylic dyeing.Liquid Cationic Dyes