The principle of PVC processing aids

PVC processing aid is a small material that helps PVC products. Its use can make the product process better, but what functions does it have? What is the working principle in the process of use? Below, Shandong Bangtai Petrochemical will give you a brief introduction. If there are any incomplete ones, you are welcome to add them:

There are three main functions of processing aids: promoting resin melting, improving melt rheological properties, and imparting lubricating properties. This is because the ductility of the PVC melt is very poor, which can easily lead to the rupture of the melt, and the relaxation of the PVC melt can also easily make the surface of the produced product rough and dull.

The following will give you a detailed introduction to the three functions of processing aids:

1. Promote resin melting: when pvc resin is heated and melted under a certain shear force, the processing aid first melts and sticks on the surface of pvc resin particles, which increases the viscosity and friction of pvc and effectively transmits the shear force And heat, accelerate pvc melting;

2. Improve melt rheological properties: PVC processing aids can improve the flow properties of PVC melt such as poor strength, poor ductility and melt fracture. The principle is to increase the viscoelasticity of the PVC melt, thereby improving the die expansion and improving the melt strength;

3. Imparting lubricity: Let the processing aid and the PVC compatible part melt first to promote the melting effect, and the non-PVC compatible part migrates out of the molten resin system, thereby improving the release property.

The above is a brief introduction to the role of our Bangtai Petrochemical for PVC processing aids. He has a lot of effects on the processing of our products, so our PVC product processing is inseparable from him. If you have anything else you want to know, Welcome to call us, or contact our backstage staff directly, and they will answer you kindly.