The new Genesys line of auto-adaptive single hopper drying systems from Piovan delivers optimal and consistent operating conditions and lower energy consumption. It is one of the first patent issued in Europe for a high-efficiency polymer drying system.
The plastics industry processes non-hygroscopic and hygroscopic polymers. In non-hygroscopic polymers, the moisture is superficial and therefore eliminated by routine drying. With hygroscopic polymers, on the other hand, the moisture also penetrates into the resin, and so a drying system generating dry air using aluminium silicate, a material capable of trapping water molecules, is required. Modern drying systems do not stop at drastically lowering residual moisture, instead they regulate the exact content to required levels for polymer processing. The systems are highly reliable - which means operating consistency and repeatable results - and energy efficient.
In developing the new Genesys, Piovan has incorporated process control elements in addition to these bonus features (high operating reliability, energy efficiency):
- consistency in the physical characteristics of the polymer after drying;
- the system adjusts automatically to the initial conditions of the polymer and those required by the process.
There are many variables in the drying process:
- drying temperature;
- air dew-point (the quantity of residual moisture);
- the airflow capacity and the properties of the plastic granule to be processed;
- ambient temperature;
- initial moisture;
- instantaneous quantity of material processed;
- residual moisture.
All these parameters have been taken into account in the Genesys project, launched by Piovan in 2009 for PET preform and bottle production only and now offered in a new range of systems for a much wider application.
Read the complete article published on Macplas.