How to effectively improve the dye uptake rate of overflow dyeing machine

1 Strengthen the impurity and decontamination treatment of the contaminated objects

Adequate pre-treatment, good fabric wettability, large capillary effect, the diffusion ability of dye molecules to the dyed matter may increase, thereby increasing the dye uptake rate. Therefore, strengthening the impurity removal and decontamination treatment of the dyed material can achieve the above-mentioned purpose.

2 Mercerizing treatment of cotton fabric

After mercerized cotton fabric, its ability to absorb dyes is significantly improved. Compared with cotton fabrics without mercerizing treatment, it can achieve a medium-dark effect and improve surface gloss.

3 Alkali reduction treatment of polyester fabric

Polyester macromolecules have high crystallinity, tight fiber structure, high refractive index and surface reflectivity, smooth fiber surface, and mainly specular reflection for light. After dyeing black with disperse dyes, there is a large amount of reflected light from the surface of the fabric. White light enters the line of sight, so dark black is more difficult to obtain. After the alkali reduction treatment, the original smooth surface of the polyester becomes a rough surface, forming a concave-convex and irregular reflection layer, which is what we often call the "etching" effect, which produces a certain dark effect, and the reduction treatment The degree of freedom of movement of the fabric increases, and the adsorption capacity of the dye increases.