Mixed Reactive Disperse Dyes on Wool Yarn Dyeing in Supercritical CO2

Mixed reactive disperse dyes is adopted to dye wool yarn by supercritical CO2 dyeing equipment, and the influencing factors on the wool yarn uptake are analyzed including dyeing temperature, dyeing time, dyeing pressure. The results reveal the interaction relationship between single dyes dyeing on the wool yarn: the total uptake of mixed reactive disperse dyes and the uptake of single reactive disperse dyes increase with the increasing of temperature and pressure, it also increase by the extension of time. In the same conditions, the total uptake of mixed reactive disperse dyes is more than the uptake of single reactive disperse dyes. The uptake of single reactive disperse dyes in the mixed dyes is less than the uptake of single reactive disperse dyes. In the dyeing process of mixed dyes, the wool yarn dyeing of two dyes has selective and competitive. Both color fastness to rubbing and color fastness to washing of dyed wool yarn are in line with national institute of standards.