The production process of polyester FDY yarn is as follows: Firstly, the PET chips and polyester masterbatch are dried, the polyester masterbatch is directly dried, and the mother particle syringe is used for injection. The PET chips need to be pre-crystallized before proceeding. Drying, then mixing the two in a certain amount and proportion, and putting the obtained mixture into a prepared screw extruder for extrusion, then filtering the melt, placing it in a spinning box, and performing the same Side blowing, oiling on the oil roller, forming a pre-network on the hot roll, stretching, shaping, and finally winding to form the finished FDY color yarn.

The specific process of polyester masterbatch is as follows:

As with PET chips, the drying treatment of polyester masterbatch has high requirements on drying conditions. It is necessary to continuously dry the polyester masterbatch. The index after drying of the polyester masterbatch should be the color obtained after drying. The masterbatch water mass fraction should be 25×10 -6 lower. If you want to achieve this effect, the selected drying conditions should be controlled at 125 °C ~ 135 °C, and the drying time should be controlled at 5 h, within 5 h. The polyester masterbatch is continuously dried.