Dyeing process of high temperature and high pressure dyeing machine
Jun 14, 2022
(1) Adsorption
When the fiber is put into the dye solution, the dye in the dye solution will gradually diffuse and transfer to the fiber surface. This process is called adsorption. Adsorption is reversible. Due to the change of dye concentration in the dye solution, the dye that has been dyed on the fiber will re diffuse to the dye bath. This process is called desorption. In the process of dyeing, adsorption and desorption coexist and maintain balance.
(2) Diffusion
Because the dye is adsorbed on the fiber surface, the dye concentration difference is formed inside and outside the fiber, which promotes the dye to diffuse from the fiber to its interior. At this time, the dye in the solution continues to adsorb to the fiber surface until the adsorption and resolution reach equilibrium again.
(3) Fixation
The process of combining the dye diffused into the fiber with the fiber is called fixation. The fixation method varies with the types of dyes and fibers. In the dyeing process, these stages are both different and related to each other, and cannot be completely separated.