Multi-Layer Film Recycling of Production Waste

Coperion is implementing a closed-loop concept for the production of flexible multi-layer film. With a closed-loop approach solution, up to 100 percent of multi-layer film production waste can be re-processed and fed back into the production process.
Within the twin screw extruder, shredded production waste is processed such that it can be added back into the multi-layer film production process. (Source: Coperion)

For a concrete project Coperion will deliver a recycling system, including bulk material handling, feeding, and a ZSK Mc18 twin screw extruder.

Multi-layer film waste resulting during the production process is shredded as a first step before it is fed into the extruder via pneumatic conveying and accurate feeding from Coperion K-Tron. There, the material is homogenized and devolatilized with very high intensity in the co-rotating twin screw extruder. Within the extruder, dispersion and devolatilization performance are crucial to end product quality — with gentle product handling and good mixing behavior even at very high throughput rates, thus achieving consistently high product quality.

With the closed-loop approach, production waste resulting from multi-layer film production can be re-added and re-processed within the manufacturing process. (Source: Coperion)

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. Multi-layer film manufacturing thus takes place sustainably, highly efficiently, and resource-friendly with the aid of advanced technologies.

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, with our years of process know-how and our visionary technological solutions, we can contribute to a promising, forward-looking and sustainable closed-loop approach.”


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