09 Feb 2024 --- Siegwerk, Greiner Packaging and Krones have pioneered a recycling initiative to convert “non-recyclable” direct-printed PP and PS cups into high-quality recyclates. Direct-printed PP and PS cups have traditionally been deemed non-recyclable by prevailing Design for Recycling Guidelines. However, Siegwerk, Greiner and Krones were able to employ hot caustic washing, a standard process predominantly used in PET bottle recycling but increasingly adopted in handling polyolefin (PO) and PS rigid streams, to de-ink and convert the rigid containers into white recyclates.
