At present, 30% of the package’s PE layer consists of industrial waste reclaimed from Mondi’s factory in Halle, Germany. That means the overall package structure contains approximately 10% regrind material.
Given the technical challenges involved, both companies recognize this as an important initial step to helping ensure that such consumer packaging meets the environmental needs of a more circular economy. Considering the package requirements — a shiny white exterior, an easy-peel opening, and no compromise in overall functionality — this is already a significant achievement for a thin, flexible OPP/PE laminate. But the two partners have much more ambitious goals.
“Our aim is to achieve 50% level of regranulate in the full structure,” says Timo Müller, Mondi’s Key Account Manager for Henkel. This project has been made possible by the advanced resin reclamation technology in place at Mondi’s Halle plant, which allows the firm to collect and separate not only transparent and white materials, but also those that do not contain a slip agent. This helps to enable the use of regrind in the laminate without negatively impacting its material specifications and product mechanical properties, according to Müller.
“We are working closely with our OPP film supplier,” he adds, “to allow us to use oriented polypropylene with regranulated content, thereby enabling us to increase the percentage of reclaimed material in the entire structure.”
The resulting end product offers clear environmental benefits: Virgin resins are replaced with regrind material and the product’s end-of-life recycling process is simplified as the OPP/PE laminate structure consists entirely of polyolefin materials, Müller notes.