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Styrenics Circular Solutions affirms recyclability of foamed PS food trays
Source:Adsale Plastics Network    Editor:JK    Date:30.Sep.2022

Styrenics Circular Solutions (SCS), the value chain initiative to realize the circular economy for styrenic polymers, confirmed the recyclability of foamed polystyrene (PS) trays, which had been proven in practice by SCS members in close collaboration with the entire value chain.


The high purity mechanical recycling process was successfully adapted to extruded polystyrene (XPS) food trays, which now enables extending closed-loop recycling to XPS food trays.


This closed-loop, tray-to-tray recycling scheme was made possible by the close collaboration of actors across the value chain: consortium Corepla, which already routinely collects post-consumer foamed PS trays in Italy, created a sorted fraction of foamed PS in its sorting centres.


SCS member Tomra and Zimmermann then performed the high-purity mechanical deep sorting, hot washing and flake sorting. Forever Plast S.p.A. developed the dewatering and finishing into PS recyclate.


SCS members and their partners show closed-loop recyclability of foamed polystyrene food trays.

SCS member Versalis (Eni) verified the high purity of the PS recyclate in a quality assessment and converter Magic Pack, a member of ProFood (Unionplast), integrated the recyclate in new foamed PS food trays.


The suitability for use in food contact articles is ensured by using recycled PS (rPS) in the middle layer of a so-called ABA structure with virgin PS as a safe functional barrier.


The foamed PS trays produced with this innovative process contain 50% rPS, are 100% recyclable themselves and can be recycled multiple times over again. The use of rXPS content behind a PS functional barrier has already been commercialised by ProFood.


Jens Kathmann, Secretary-General of SCS, said, “The proof that XPS food trays can be effectively and efficiently sorted, recycled and returned even to its original food contact applications, should inspire accelerated scale-up. It also confirms the market demand for rXPS trays, which should encourage others to follow the example of Italy."

Claudio Bilotti, Polystyrene Marketing Manager of Versalis (Eni), commented, “The results confirm that XPS trays are fully circular: they are already today widely collected in Corepla’s collection system in Italy. The trays are easily sortable in Corepla’s existing sorting facilities and now have proven in practice to be recyclable in a closed loop thanks to the innovative high-purity mechanical recycling process adapted from rigid PS to foamed PS."



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