Pressing agents and lubricants
Pressing agents and lubricants are used in pressing and in plastic bodies, where they optimise the shaping properties. They reduce internal friction of the body, leading to a more homogeneous compaction and, thus, contributing to a reduction of microstructural tensions. Friction between the article and the mould wall is reduced. An increase in effective mould life is, therefore, possible. The sticking tendencies of the body to the mould wall can also be decreased. In the compaction of spray granulates, pressing agents can further act as softeners, so that during pressing a simple breakdown of the residual granulate structures becomes possible.