Lubricants play an important role during processing because of its ability to decrease frictional force and to aid in achieving desired rheology. Factors such as machine output, mechanical properties and appearance of end product can also be controlled by intelligent use of lubricants.

They are classified into internal & external lubricants based on their lubrication properties. Largely lubricants exhibit both internal and external lubrication properties in conjugation with one effect dominating over the other.

Internal lubricants reduce frictional heat and shear between polymer molecules by lowering melt viscosity of PVC thereby improving flow characteristics whereas external lubricants reduce frictional heat between polymer molecules and metal surface thereby also improving gloss. In some cases they also promote mold release, slip effect and anti-blocking effect.

Power Additives offers Powerlub series of internal and external lubricants for a broad range of applications across multiple industries.