ENERGY-EFFICIENT AND ENVIRONMENTALLY FRIENDLY ULTRA-LIQUID DYEING PROCESS FOR NYLON CHEMICAL FIBER

Abstract

This invention relates to an energy-saving and environmentally friendly superfluid dyeing process for nylon chemical fibers, belonging to the field of printing and dyeing technology. The dyeing process of the invention involves decontamination, degreasing, and pre-setting of the nylon chemical fiber, followed by plasma treatment on the surface of the nylon chemical fiber to achieve surface cationization. Then, superfluid dyeing of the nylon chemical fiber is performed through a multi-layer roller-type winding. After dyeing, the nylon chemical fiber can be fixed after color fixation. The color fastness of the nylon chemical fiber after superfluid dyeing in this invention can reach level 4. Furthermore, the entire dyeing process of the invention does not discharge wastewater. Simultaneously, after degreasing and color fixation, the steam is recovered and recycled through heat exchange, saving energy and being environmentally friendly.