Meaning
Industrial processes designed to sort and wash thin-gauge polymer films represent a rapidly evolving segment of the circular plastics economy. In the recovery of post-consumer waste, flexible packaging recycling converts multi-layer and mono-layer film structures back into reusable resins. The workflow is restricted by the complexity of co-extruded films which often contain incompatible polymers such as polyethylene and polyamide.
The process terminates with the pelletization of clean, dry flake that is suitable for compounding into new products.
Collection Sorting
Automated sorting centers employ near-infrared sensors to identify and separate different film types. Manual sorting is too slow for the high volumes processed daily. Films are bundled into large bales to facilitate transport to specialized recycling facilities.
Processing Challenge
Contamination from food residues and adhesive layers reduces the quality of the recovered material. Multi-layer structures are difficult to separate into individual polymer streams. Incompatible resins in the melt cause phase separation, which weakens the mechanical properties of the recycled compound.
Mechanical Reclamation
Shredding and washing operations prepare the films for melt filtration and extrusion. Specialized vented extruders are used to remove moisture and volatile organic compounds from the molten plastic. The resulting pellets can be blended with virgin polymer to balance performance and cost.
