"We are very excited about this collaboration as it gives us a head start on our transition to circular materials," says Thomas Fuhr, Chief Technology Officer at Uponor. "PEX is by far the material that has the most versatile application uses, from building water supply systems to efficient radiant heating and cooling systems, thanks to its superior properties for the construction industry. At Uponor we have just celebrated the first 50 years of our PEX piping, and now our new long-term goal is to use 100% of our PEX waste as raw material through closed loop recycling."
"Hard-to-recycle waste plastic as input and high-quality polymers as output are not in contradiction anymore," says John Webster, Global Commercial Director Infrastructure at Borealis. "In fact, we are able to integrate chemically recycled PEX pipe waste plastic as a raw material into our established manufacturing processes. It doesn’t require additional tests, approvals or validation. It’s a drop-in solution ready to use even for drinking water applications."
"The successful project demonstrates not only that recycling of PEX is possible via chemical recycling, but it also shows that it’s actually possible with high yields: some 80% of the PEX production waste can be added back to the circle," says Kaisa Suvilampi, Managing Director and Partner at Wastewise. "Through our processes, we were able to turn PEX into pyrolysis oil of sufficient quality to use it as input for a refinery, which in turn can process it into a high quality cracker feed. This project strikes certain PEX off from the list of materials giving recyclers a headache."
"The curtain is opening for chemical recycling," added Mercedes Alonso, Executive Vice President Renewable Polymers and Chemicals at Neste. "It will still take time to reach large-scale operations, but this project is providing the blueprint for circular value chains for polymers via chemically recycling. It’s pushing the technology from the promise to the delivery phase. Further, it shows the importance of bringing the right partners together to cooperate."
Due to the involved parties’ commitment to pushing circular solutions for polymers and the solution’s drop-in character, the partners were able to establish the value chain in a rather short period of time. Little more than six months passed between the start of the project and the production of the first pipes made with chemically recycled PEX waste.
The partnership holds potential for further cooperation beyond production waste: The PEX pipes made by Uponor have already been optimized from a resource efficiency point of view by reducing their wall thickness and increasing lifetime. At the end of their long life, mechanical recycling is so far the first recycling option, but it also means downcycling the materials, e.g. into other construction materials or items such as hockey sticks. With chemical recycling, though, the PEX waste pipes can be turned into fully functional PEX pipes again. Moving forward, the partners will evaluate further opportunities for cooperation. Aside from broadening the waste material pool, this may also include higher recycled volumes.