Material introduction downstream of the finisher

After extrusion and filtration, the purified polymer melt is fed via a booster pump into the IV boosting system JUMP. Agitating and mixing devices within the JUMP reactor also achieve – under a deep vacuum – high polymer melt surface exchange rates and so achieve a set IV. The viscosity is set by means of the Online Viscometer and the process control system. The polymer melt is pumped out of the vacuum and directly into the polymer melt pipe downstream of the finisher, with an IV which matches that of the main polymer flow and the recycled content is mixed with the virgin polymer melt.