Note the common problems in the production of polypropylene FDY yarn!
Polypropylene FDY silk plays a very important role in our lives. The production processes and processes will affect the quality of the polypropylene FDY yarn we use. What are the common problems that arise in the production process? Let's find out together!
Polypropylene FDY yarn production process: mixing - feeding - screw extruder - melt filter - spinning box - side blowing - spinning tunnel - oiling - yarn guide - first draft 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 device - winder - bobbin wire
Spinning temperature directly affects the rheological properties of polypropylene, the degree of degradation of polypropylene, and the degree of pre-orientation of primary fibers. Therefore, the spinning temperature is the main process parameter in melt forming. If the spinning temperature is too high, the melt viscosity will decrease too much, and the spun wire and wool will be easily generated during spinning. At the same time, because the melt viscosity is too low and the flowability is large, the formation of self-weight draw is greater than that caused by the stretching of the nozzle. Silk phenomenon. The spinning temperature is too low, the melt viscosity is too large, and the twisting wire is difficult and non-uniform, resulting in melt fracture of the spinneret that cannot be wound when it is stretched, and severe breakage and hard filaments may occur in severe cases.
From the above description, it is not difficult to find that the spinning temperature is the key to determining the quality of polypropylene FDY yarn. During the production process, we need to pay attention to these issues to be able to make the manufacturing process more efficient and smooth. The resulting polypropylene FDY Silk is more superior.