Dyeing fluff is a very important link in flocking fabrics. The shade and physical and chemical indicators of the fluff after dyeing must meet certain requirements.
In terms of flocking, fluff dyeing is first to satisfy the alignment of the color light, and to not regain color during the baking and baking process after flocking. If printing is to be carried out after flocking, the dyed fluff must be able to withstand each process of the entire printing process, and the flocking cloth has good stability in steaming, hot water washing or soaping, and acid and alkali. If it is for discharge printing, the dyes in the dyed fluff must not be resistant to reducing agents, which is very important for the selection of dyes during dyeing, otherwise the whiteness of each discharge will be different, and even a unified printing process will be obtained. Different products, so that only some self-sold products can be produced, and orders cannot be taken. This is a failure in flock extraction. Generally speaking, the selection of dyeing dyes should meet the following requirements:
1) The compatibility of color-blocking dyes is better, and they have similar dyeing curves.
2) Various color fastness indexes of dyes meet customer requirements.
3) In discharge printing, the dyes for dyeing fluff must not be resistant to reducing agents, and the whiteness of discharge is better. Generally, semi-discharge dyes cannot be used.