What aspects do you need to pay attention to in the process of producing PP FDY yarn?

PP FDY yarn production process: mixing - feeding - screw extruder - melt filter - spinning box - side blowing - spinning tunnel - oiling - yarn guide - 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. PP FDY yarn spinning temperature is too high, melt viscosity is too large, PP FDY yarn is easy to produce tip yarn and wool when spinning; at the same time, because the melt viscosity is too low, the fluidity is large, and the formation of self-weight is greater than The phenomenon of wire bonding caused by the stretching of the nozzle. 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.

Founded in 1984, Ningbo Volkswagen Chemical Fiber Industry Co., Ltd. is now a national medium-sized enterprise, a large industrial enterprise in Zhejiang Province, with an annual output of 68-1800D polypropylene filaments, polypropylene POY filaments, polypropylene plain yarns, PP FDY yarn 15,000 tons. , 1.5D—13D 25,000 tons of polyester staple fiber of various specifications, “Volkswagen” brand has been rated as Zhejiang recommended product for six consecutive years.