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As global multiparticipant project NextlooPP works towards launching its PolyPPrism technology at commercial scale, the team has trialled fluorescent markers on MCC Verstraete’s in mould labels (IML).

For these trials, Tomra’s Autosort unit Flying Beam, with integrated UV illumination, was used. NextlooPP says direct spectophotometric measurements analysed the strength of the fluorescence emissions to ensure that there was sufficient fluorescent signal to provide the highly-effective sorting of food-grade labelled packs.

The trials, which resulted in 100 per cent purity and 100 per cent yield during internal tests, propel the multi-participant project a step closer to its goal to produce high-quality recycled food-grade polypropylene (FGrPP).

NextCycle IML is a new generation of in mould labels that features automatic detachment and removal during conventional recycling processes.
NextCycle IML is a new generation of in mould labels that features automatic detachment and removal during conventional recycling processes.

Having established these successful sorting rates, NextlooPP says it is working with MCC Verstraete, one of the project’s 48 participants, to showcase NextCycle IML, a new generation of in mould labels that features automatic detachment and removal during conventional recycling processes.

NextCycle IML consists of an adhesive-free, fully printed (with non-bleeding inks) PP label wrapped-around a PP tub that is separated from the containers at the grinding and air elutriation stages. This technology readily separates printed label flakes from natural PP container flakes and avoids the risk of ink and decoration contamination.

This means that brands can have fully decorated IML containers that are used over natural PP substrates to provide a separate stream of natural PP free from print and label residues.

According to NextlooPP, further trials are to follow on NextlooPP participant branded products to demonstrate the viability of using new generation decorative technology designed for polypropylene (PP) packaging that can be effectively sorted and decontaminated back to food-grade resins.

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