Action principle of PVC processing aids

1. Promote resin melting: When PVC resin is heated under the shear force, the processing aids for processing PVC first melt and adhere to the surface of PVC resin particles. Based on its compatibility with the resin and high molecular weight, the viscosity and friction of PVC increase, so as to effectively transfer the shear stress and heat to the entire PVC resin and accelerate PVC melting.

2. Melt rheological modification: PVC melt has poor strength, poor ductility and melt fracture, and the resin system migrates outside, thus improving the demoulding property.