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Coperion delivers new closed-loop solution to reproduce multi-layer film
Source:Adsale Plastics Network     Editor:JK    Date:15.Apr.2020

Coperion has developed a closed-loop approach solution in which up to 100% of multi-layer film production waste can be re-processed and fed back into the production process in a closed-loop.


Recycling multi-layer film has long posed a challenge since such films can only be reclaimed in very complicated ways and not without residues. 

For a concrete project Coperion will deliver a recycling system, including bulk material handling, high-accuracy feeding from Coperion K-Tron, and the heart of the system, a ZSK Mc18 twin screw extruder.


The ZSK extruder could process the shredded production waste and add it back into the multi-layer film production process.

Multi-layer film waste resulting during the production process is shredded as a first step before it is fed into the ZSK extruder via pneumatic conveying and highly accurate feeding from Coperion K-Tron. There, the material is homogenized and devolatilized with very high intensity in the co-rotating ZSK Mc18 twin screw extruder.


Within the extruder, dispersion and devolatilization performance are crucial to end product quality — with gentle product handling and very good mixing behavior even at very high throughput rates, thus achieving consistently high product quality.


Following homogenization in the ZSK extruder, in the closed-loop concept, the recycled material is added back into the multi-layer film production process, with no quality loss and the proportion of added recyclate is very high. Thus, multi-layer film manufacturing takes place sustainably, highly efficiently, and resource-friendly with the aid of advanced technologies.


Closed-loop multi-layer film production.

Peter von Hoffmann, General Manager of Business Unit Engineering Plastics & Special Applications at Coperion, is convinced: “Sustainability is becoming more and more important, and the topic of the circular economy is moving further into the foreground for companies – and that is much more so for multi-layer film producers. We’re proud that we can contribute to a promising, forward-looking and sustainable closed-loop approach.”



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