The Importance of Drying in PET Processing
Drying is the single most important variable in the processing. Improving the manufacturing and physical properties of recycled, food-grade PET through technology powered by infrared light plays a crucial role in intrinsic viscosity (IV) management.
Pre-crystallization and drying of flakes prior to extrusion minimize IV loss. By utilizing an IRD System for homogeneous drying, you can limit hydrolytic degradation. Additionally, PET melt does not turn yellow as drying time is significantly reduced (only 15-20 mins), achieving final moisture levels ≤ 30ppm with energy consumption under 80W/KG/H.
Frequently Asked Questions
Q: What final moisture level is achieved and are there limits on raw material?
A: The final moisture can reach ≤30ppm for PET, with an initial moisture capacity of 6000-15000ppm.
Q: Do I still need a pre-dryer if I use an extruder with vacuum degassing?
A: Yes, we strongly recommend a pre-dryer to avoid atmospheric moisture absorption, which degrades extrusion performance and IV levels.
Q: What is the delivery time for the IRD system?
A: Delivery is 40 working days upon receipt of the deposit.
Q: How is the installation handled?
A: We offer on-site installation by experienced engineers or online guidance services. Machines use aviation plugs for easy connectivity.
Q: What materials is the IRD suitable for?
A: It is ideal for PET, PLA, TPE, ABS/PC, HDPE, PBT, PEEK, and various other polymers for crystallization, drying, and removal of volatile components.