Of all the tens of thousands plastics available worldwide that are used by the plastic converter industry most undergo compounding in order to meet product requirements. It is estimated that over 65 wt-% of the 200 million tons consumed worldwide are compounded. Compounding is a very large and important market.

The thousands of different additives and other ingredients used in the compounds improve the plastics performance during processing and / or meet the many different product requirements, including cost restraints. The composition of the compound is dictated by the requirements of the converter’s application. Among the very many different additives are pigments, dyes, fillers, UV stabilizers, coupling agents and others.