The invention relates to a thermal sublimation
digital printing ink-jet ink and a preparation method thereof; the weight percentages of ink components are: (1)
disperse dye: 1 to 10 percent; (2) dispersant: 1 to 10 percent; (3)
organic solvent: 60 to 90 percent; (4) surfactant: 1 to 5 percent; (5)
wetting agent: 1 to 5 percent; (6)
defoamer: 1 to 5 percent. The preparation method comprises: (1) the
disperse dye, the dispersant, the
organic solvent, the
wetting agent and the deformer are mixed at normal temperature, and a
mixed solution can be obtained by stirring the mixture for 0.5 to 1 hour; (2) the
mixed solution is homogenized for 0.5 to 5 hours under a
high pressure homogenizer, and the stable-dispersed ink, the average particle size of the dispersed dye of which is 100 to 300 nanometers can be obtained; (3) the ink of
magenta (M), cyan (C), yellow (Y), black (K), light cyan (Lc) or light
magenta (Lm) can be obtained after the ink is filtered by a 2 microns filtering film and a 0.45 micron filtering film. The particle size of the thermal sublimation
digital printing ink-jet ink of the invention is even in distribution and good in disperse stability and can be applied on the large scale piezoelectric type
digital printing machines of the nozzles of XAAR and SPECTRA, etc and printed on
polyester fabrics; ink jetting is smooth without blocking the nozzles; the thermal sublimation digital
printing ink-jet ink can be stored for a long time; the patterns printed by the ink of the invention is colorful in color and the thermal sublimation digital
printing ink-jet ink is good in color fixation rate, washing fastness and solarization fastness, is simple in the operation of the production method and is environment-friendly.