ADDITIVES | RECYCLING
Various existing commercial compatibilisers have been evalulated and recognised as not interfering with recycling at certain levels in given polymers. For example, last year, Kraton’s CirKular+ C1000 and C1010 Compatibilisation Series and CirKular+ C2000 Performance Enhancement Series received Critical Guidance Recognition from APR for use in PE flexible films. CirKular+ additives had previously received the APR Critical Guidance Recognition for use in PP containers and HDPE bottles and had been certified as compatible with HDPE and PP container recycling in Europe by Plastics Recyclers Europe and the RecyClass system.
Guidelines The European PET Bottle Platform (EPBP) offers recycling design guidelines specifically for PET bottles to support a circular economy for the European PET value chain. EPBP has created test procedures to assess impact of technologies on rPET properties and established recycling process- es. For example, materials, including additives and any non-PET components in a bottle, can affect colour, clarity, mechanical properties and process- ing. One protocol looks at basic recyclability (ie
collection, sortation, reprocessing) using estab- lished recycling technologies. As the circular economy evolves, bottles will need to withstand multiple-loop recycling. A Circularity Evaluation Protocol, updated in July 2025, assesses whether a PET package can be recycled multiple times. The focus is on bottle-to-bottle recycling. A previous protocol for bottle-to-fibre is no longer considered an option.
Scavengers and barriers Avient’s latest is ColorMatrix Amosorb Oxyloop-1, an oxygen scavenging additive specifically formu- lated for use with up to 100% recycled PET (rPET). The new technology is EPBP-accredited for coloured bottle-to-bottle recycling. Avient said it also increases quality in transparent rPET. The technology is non-nylon based and has no scav- enging delay or deactivation, Avient said. It is intended for low-to-medium term shelf-life applica- tions, including juices, oxygen-sensitive vitamin drinks, ready-to-drink teas, and certain dairy products. Ultraviolet (UV) light-blocking additives may be used in PET bottles to protect the contents in
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