Effect of Melting Temperature on PVC Plasticization


Melting temperature is the most direct response to mate […]

Melting temperature is the most direct response to material plasticization. However, the melting temperature does not necessarily reflect the true level of raw material plasticization. The melting temperature is not only affected by the extruder process, but also by the process of the adapter. The plasticization, flow and viscosity of the melt reaction raw materials. When the melting temperature is high, the melt flow capacity is enhanced and the melt pressure is decreased.
The torque parameters on the extruder reflect the morning and evening of the plasticization of the raw materials and the viscosity of the melt. The torque is the load applied to the screw in the entire barrel for the plasticized powder, the semi-plasticized melt and the plasticized melt. The torque is mainly generated from the melt being plasticized and plasticized. If the material is plasticized earlier, the torque increases.
In the case where the apparent density of the dry mix is close, the change in the observed torque can be judged whether the plasticization is advanced or delayed. When the temperature of the front of the cylinder is increased, the plasticization of the raw material is advanced and the torque is increased. According to the actual changes in melting temperature, melt pressure, and torque, it is possible to determine the plasticization of the raw materials and whether the process is reasonable, and guide the adjustment of the process parameters.