Views: 1205 Author: Site Editor Publish Time: 2023-01-02 Origin: Site Inquire
There are many factors that affect the dyeing process, mainly including:
1. Properties of dyes
The dye structure and its molecular size and shape determine the solubility, diffusibility and affinity of the dye to the fiber.
2. The nature and concentration of additives
Whether it is in the dye or in the dye bath, there are many types of auxiliaries, such as acids, alkalis, salts, or oxidizing agents, reducing agents, and more are dispersants, leveling agents, and dyeing accelerators. The solubility, dispersion stability, diffusivity in the dye bath and in the fiber, and the dyeing rate will all be affected.
3. Dyeing machine function
The function of the dyeing machine, especially the flow rate of the main pump and the heating and cooling capacity of the heat exchanger have a great influence on the dissolution, internal and external diffusion, and adsorption of the dye.
4. Process parameters
Process parameters, including dye concentration, bath ratio during dyeing, temperature, heating and cooling rate, holding time, setting of forward and reverse cycle time of dye liquor, and adding method of auxiliaries, will all affect the dyeing process of dyes.
5. Fiber properties
The structure and surface characteristics of the fiber itself will also affect the dyeing process, such as ultra-fine fibers, which have a small radius and a large specific surface area, so that the surface absorbs the dye quickly and the amount of dye is large. The easier it is for the dye to diffuse into the fiber, the faster the dyeing rate will be.