The invention discloses low-
conductivity and high-temperature direct injection
disperse dye ink and a preparation method thereof. The low-
conductivity and high-temperature direct injection
disperse dye ink is prepared from the following raw materials in parts by
mass: 10 to 40 parts of high-temperature
disperse dye, 10 to 40 parts of dispersing agent, 10 to 50 parts of
organic solvent, 10 to 60 parts of water, 0.05 to 0.5 part of
preservative and 0.01 to 0.05 part of defoaming agent, wherein the dispersing agent is a compound product of a special dispersing agent and a nonionic dispersant, andthe weight ratio of the special dispersing agent to the nonionic dispersant is (60 to 95) to (5 to 40). The preparation method comprises the following steps: mixing the high-temperature disperse dye,the dispersing agent, the water, the
preservative and the defoaming agent to form a mixture; sanding and dispersing; carrying out
nanofiltration on a sanded mixture; adding the
organic solvent into obtained color paste, thus obtaining the high-temperature direct injection disperse dye ink. The low-
conductivity and high-temperature direct injection disperse dye ink disclosed by the invention has the characteristics of high saturation, bright color and less salt
precipitation; the conductivity is low and the service life of a spray head is prolonged; the ink has good
dispersion stability and long storage time.