According to reports, no matter which type of ink, its basic composition is coloring agent, dispersion medium (water, organic solvent), antibacterial agent, pH adjuster, moisturizer, etc., there must be a dispersant for pigment inks. Adhesives, etc.
Colorants for textile inkjet printing can be classified into dyes and pigments, as well as inks using dyes and pigments mixed with colorants.
It is noted that not all conventional printing dyes can be used as colorants for inkjet printing inks, and currently developed inkjet printing dyes are mainly reactive dyes, acid dyes, and disperse dyes.
2. Antibacterial agent
The antibacterial agent prevents mildew of the ink during storage and prevents the ink path in the ink jet printer from being clogged by the ink mold.
3. PH regulator
On the one hand, the pH regulator is to prevent the hydrolysis of the dye to ensure the stability of the dye solution, and on the other hand, to make the ink nearly neutral, and to prevent corrosion of the nozzle and the ink path system of the ink jet printer.
Therefore, it is generally necessary to add a suitable pH adjusting agent to control the pH to about 8.
There are two kinds of surfactants: one is to control the surface tension of the ink to adapt to the requirements of the digital inkjet printer; the other is to help the dye to improve the stability of the dye solution. Surfactants are generally selected from the group consisting of glycols or naphthalenesulfonic acids.
On the one hand, the humectant is added to prevent the ink from drying out at the nozzle mouth, causing clogging, causing inkjet obstacles, and on the other hand, regulating the diffusion and penetration of ink on the fabric.
Dispersants are especially used in pigmentary inkjet printing inks for the dispersion of pigments. Commonly used dispersants are polystyrene-maleic anhydride, polyacrylic acid (ester) and the like.
For pigment type inkjet printing inks, since the pigment has no affinity for the textile fiber, the textile must be colored by the action of the resin binder. Commonly used resin adhesives are polyacrylic acid hydrazine, waterborne polyurethane, UV curing adhesive, and the like.
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