| 摘要 |
The invention relates to a method for dyeing split-type microfibers made of a composite of polyester and polyamide by a yarn dyeing process. The method comprises: a weight reduction step comprising winding the microfibers on a yarn dyeing machine and adding an alkali agent at a uniform temperature of 100-130 DEG C for 30-60 minutes to make a reduction of 6-15% in the weight of the microfibers; a water-washing step comprising injecting iron-free water at 70-80 DEG C onto the microfibers through a nozzle, applying water pressure to remove foreign materials while scouring the microfibers by the addition of a scouring agent, and treating the microfibers with acid to a pH of 4-5; a dyeing step of dyeing the microfibers under pressure by the addition of a dye together with a dispersant, a leveling agent, an antistatic agent and a softening agent; and water-washing and drying the dyed microfibers. |
