The OTP process ensures a void free pellet production. Considering the physical parameter of a polymer, the thermal control scheme during pellet formation and conditioning must avoid internal tension generating. Temperature profiles for the cooling liquid (e.g. water) above atmospheric boiling point require therefore pressurized systems. The equipment is operating continuously and stable, including an integrated depressurizing step.

 

Pellets produced by such a thermal controlled process are less brittle and generate less dust. The absence of voids is ensuring cleaner products with very low impurity level, a basic requirement for polymers used in optical applications or several electrical and other technical applications.