Polymetrix AG, Switzerland, designs, supplies and installs complete plants for Thermal treatment of Bulk Materials, vPET, rPET, PA6, PA66, PBT; based on well-known technologies and services of Bühler Thermal Process AG. Switzerland
PET SSP leaN - floor mounted design
The SSP leaN plant concept has been simplified for smaller vPET and rPET plants with a throughput up to 300 t/d.
rPET treated with POLYMETRIX SSP, which is at the end of the recycling process, are mainly characterized by precise and constant viscosity, extremely low residual content of impurities, carried over from past processes, which is essential to ensure the high quality of the PET even after several recycling runs.
Polymetrix SSP process fulfils the specific requirements of the packaging industry, the national safety regulations for food packaging, and even the strict quality requirements of global beverage brand owners.
The SSP leaN process starts with a combined process step of crystallization and preheating and can be operated with both spherical and cylindrical granules. After preheating, the PET pellets are conveyed hot, subjected to the SSP reaction and cooled. Nitrogen from the process is continuously cleaned by a catalytic combustion or an ethylene glycol gas scrubber. For rPET plants. a new type of guard bed has been integrated into the process gas purification to better eliminate foreign contaminants released in the recycled material during SSP process.
Features and advantages
• Capacity from vPET 10 to 300 t/d
• Capacity from rPET 48 to 180 t/d or 2,000 kgs/hr to 8,000 kgs/hr.
• Stand-alone or directly coupled to the extruder system.
• Melt-to-granule crystallization or granule-to-granule crystallization.
• Spherical or cylindrical pellets.
• Backup system for hot pellets with refeeding into the process.
• Energy efficient.
• All process steps under nitrogen (crystallization and cooling under air or nitrogen).
• Minimized building footprint.
• Floor mounted system.
• Extruder agnostic – Compatible with twin screw, single screw, multi screw, ring screw.

Applications
• Bottle grade recycled PET production (rPET)
• Technical grade recycled PET production (rPET)
• Bottle grade virgin PET production (vPET)
• Technical grade virgin PET production (vPET)