PVC hose machine equipment strengthening laminar mixing method in single screw extruder？

Research progress on laminar mixing mechanism of polymer melt in PVC hose machine in single screw extruder. The PVC plastic pipe manufacturer analyzed and summarized the measures to improve the mixing, and pointed out the methods to further strengthen the mixing effect.
The process involves stretching streamlines, folding and redistributing geometric spaces. In the case of multiple components, it usually means that components are destroyed and accompanied by energy diffusion. The flow behavior of polymer melts is between pure elastic solids and high viscosity fluids, and there are normal stress and shear thinning characteristics which are very difficult to mix. Therefore, how to make the PVC processing equipment achieve excellent mixing effect at low energy consumption has always been the goal of people. It is generally believed that the mixing of polymer systems occurs mainly in the processing of the melt conveying part, and that the intense mixing process begins with an attempt to change the structure of the melt conveying part.
There are two aspects to study the distribution of mixed results. Among them, the study of distribution mixing is much more profound. It can be deduced that the interface of the surface system with large strain and random orientation increases to half of the total shear strain under simple shear. Noting that the residence time distribution of fluid particles is different in the mixing process, Pinto and Tadmor proposed weighted average total strain to characterize mixing in a single screw extruder. Because the single screw extruder is shear-drag supercharged conveying, the melt must flow and mix regularly in the screw groove, which means that the interface grows linearly with the strain, while the interlayer.