PVC Processing Aid

PVC processing aids refer to chemical substances added during the processing of PVC (polyvinyl chloride), aimed at improving the processing performance of PVC resin and the quality of products. These additives play a crucial role in PVC processing, mainly including promoting resin melting, improving melt rheological properties, and imparting lubrication properties. Main types and functions one Promoting resin melting: When PVC resin is heated and melted, processing aids first melt and adhere to the surface of resin particles, increasing the viscosity and friction of the resin, effectively transmitting shear force and heat, and accelerating PVC melting. two Improving the rheological properties of PVC melt: Processing aids can improve the rheological properties of PVC melt, increase its viscoelasticity, thereby improving demoulding expansion and enhancing melt strength, and reducing melt fracture. three Granting lubrication performance: The compatible parts of processing aids and PVC melt first, promoting melting, while the incompatible parts migrate out of the molten resin system, improving demolding performance.