What is worth noting in the production of PP FDY yarm?

PP FDY yarm production process: mixing - feeding - screw extruder - melt filter - spinning box - side blowing - spinning tunnel - oiling - yarn guide - the first drafting heat roller - guide wire - second draft heat roller - yarn guide - third draft heat roller - yarn guide - fourth draft heat roller - yarn guide - fifth draft heat roller - network - winder - cheese wire

The spinning temperature directly affects the rheological properties of polypropylene, the degree of degradation of polypropylene, and the degree of pre-orientation of nascent fibers. Therefore, the spinning temperature is the main process parameter in melt forming. If the spinning temperature is too high, the melt viscosity is too large, and the PP FDY yarm is easy to produce the tip yarn and the wool yarn; at the same time, because the melt viscosity is too low, the fluidity is large, and the self-weight is formed to be larger than the nozzle stretching. The phenomenon of merging. The spinning temperature is too low, the melt viscosity is too large, and the twisting yarn is difficult and uneven, which causes the melt fracture to be wound when the spinneret is stretched, and the full break and hard wire may occur in severe cases.

Dongguan Donggang Chemical Fiber Co., Ltd. is a medium-sized enterprise specializing in the production of various types of PP yarn. With Donggang Chemical Fiber Co., Ltd. continuously improving the company's management level and product technology content, "Donghong Brand" PP yarn is exported to the United States, Europe, Southeast Asia and other places in the international market. Have a high reputation.