Principle of PVC processing aids

PVC processing additive is a small material that helps PVC products, his use can make the product processing better, but what are his roles? In the process of use, what is the principle of action? Below, Shandong Bangtai Petrochemical will give you a brief introduction, if there is incomplete, welcome to add Oh:

There are three main functions of processing aids: to promote resin melting, to improve the rheological properties of melts, and to impart lubrication properties. This is because the ductility of pvc solutions is very poor, which can easily lead to the rupture of the solutions, and the relaxation of PVC solutions will also easily make the surface of the products produced rough, without gloss and other shortcomings. 

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

1, promote resin melting: PVC resin in the heating, under the action of a certain shear force when melting processing aids first melted and pasted on the pvc resin particle surface, so that pvc viscosity and friction increased, effectively transmitted shear force and heat, accelerate PVC melting;

2. Improve melt rheological performance: PVC processing aids can improve the fluidity of PVC melt with poor strength, poor ductility and melt rupture. The principle is to increase the viscoelasticity of the PVC melt, thereby improving the off-mold expansion and increasing the melt strength;

3. imparting lubricity: first let the processing auxiliary and PVC compatible part melt, promote the melting effect, and not the PVC compatible part to the molten resin system migration, thereby improving mold release.

The above is a brief introduction of our Bangtai Petrochemical for pvc processing aids, he has a lot of roles in the processing of our products, so the processing of our PVC products is inseparable from him, if you have anything you want to know, welcome to call us, or directly contact our backstage staff, will answer your family.