What are the precautions in the production process of PP FDY yarn?

Production process of PP FDY yarn: mixing - feeding - screw extruder - melt filter - spinning box - side blowing - spinning shaft - oiling - yarn guide - strong drawing hot roller - guide wire Device—the second drawing heat roller—the yarn guide—the third drawing heat roller—the yarn guide—the fourth drawing heat roller—the yarn guide—the fifth drawing heat roller—the network device—the winder—the bobbin Silk

The spinning temperature of PP FDY yarn directly affects the rheological properties of polypropylene, the degradation degree of polypropylene and the pre-orientation degree of spun fibers. The spinning temperature is therefore the main process parameter in melt forming. If the spinning temperature is too high, the melt viscosity will be reduced too much, and it is easy to produce nozzle and wool during spinning. silk phenomenon. The spinning temperature is too low, the melt viscosity is too large, and the spinning is difficult and uneven, resulting in melt rupture during the spinning of the spinneret and unwinding.

Ningbo Dazhong Chemical Fiber Industry Co., Ltd. has long-term production and operation: polypropylene yarn, polypropylene filament, PP FDY yarn, polyester staple fiber, polypropylene fully drawn yarn, polypropylene POY yarn.