To obtain patterns on the ground color of polyester fabrics, usually adopt resist printing technology or dyeing technology. Because polyester fabrics are generally dyed with disperse dyes, when the dyeing process is completed and the ground color dyes diffuse into the polyester, it is difficult to completely destroy and remove them by discharge printing.
Resist printing of polyester fabrics is mainly done by padding disperse dye solution or full-floor printing, drying at low temperature (not exceeding 100°C) to ensure that the dye does not dye the fiber, and then printing the resist printing paste that can destroy the ground color dye; Or use the method of printing resist dye paste on the fabric first, drying, and then overprinting the ground color paste.
The resist printing of polyester fabric generally cannot adopt the method of printing resist paste first, drying, and then padding the ground color dye solution.
Because polyester is a hydrophobic fiber, the ability to adhere to the color paste is poor. If it is printed first and then dipped in the dye solution, the color paste will ooze on the fabric, and the anti-dye agent will continue to enter the color. The dye solution is difficult to dye well. ground color.
The method of first dipping the dye solution (or printing all over the floor), drying at low temperature and then printing the resist paste is called step resist printing, and also called discharge resist printing.
Another method of resist printing is to print resist paste on the fabric first, then overprint the ground color paste, and finally dry it.
The characteristic of this method is that the color and ground color are completed on the printing machine last time, so it is called the step-wet overprinting "anti-printing" technique. Wet "anti-printing" technology can often get better anti-dyeing effect.
