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The Development Of Liquid Cationic Dyes

Oct 12, 2017

Polyester dyeing with disperse dyes and the rapid development of the number At present, the vast majority of factory polyester dyeing using high temperature and high pressure method, in the dyeing process prone to tar spots and color point phenomenon, resulting in the quality of printing and dyeing products difficult to meet the requirements. Therefore, how to improve the stability of disperse dyes, especially high temperature stability, the application of disperse dyes has practical significance.Liquid Cationic Dyes

In the disperse dye structure, there is no hydrophilic group, the water solubility is very low, and the colloidal dispersion system is dispersed in water. In addition to the structure of the dye itself, the disperse stability is related to the electrolyte, ion, especially the surface Active agents are closely related. In the aqueous solution, the dye single molecule, grain, dispersant and so on in the micrometer to maintain a dynamic balance, when the external conditions such as long time high temperature and pressure changes, this balance may be destroyed, the dye cohesion or even precipitation, the dyeing quality Have an adverse effect.Liquid Cationic Dyes

The addition of surfactants ML can quickly form micelles in water, so that the disperse dyes dispersed in water have a good solubilizing effect and can reduce or even prevent the crystal growth and grain agglomeration of the disperse dyes and improve the dispersion stability.Liquid Cationic Dyes

Acrylic fiber with cationic dye dyeing, in order to meet the high quality requirements of dyeing products, in the grasp of fiber properties and dye properties, but also need to use the appropriate additives, so that dyeing production in the best state of the process. According to the surface activity classification, the role of each dyeing auxiliaries in the dyeing of acrylic fiber is as follows: Cationic Surfactant: Surface active, as a slowing agent and stripping agent; surface activity is small, as a dye and stain repair The use of additives.Liquid Cationic Dyes

Anionic Surfactant: Used to neutralize the cationic charge of the dye, converted into a dispersed cationic dye, and as a detergent for the printing product in post-treatment soaping. Nonionic Surfactant: As a stabilizer for stabilizing dyeing baths and auxiliaries for preventing the occurrence of color difference before and after. Also as a scouring agent before acrylic dyeing.Liquid Cationic Dyes