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POLYOLEFINS | MATERIALS


Polyolefins ease the job of recycling


Polyolefins are the most commonly used packaging material – and are likely to cement that position with the creation of mono- material solutions that are easier to recycle


Polyethylene (PE) and polypropylene are the most common types of packaging material – for every- thing from stretch-wrap film and pallet wrap to modified atmosphere packaging and stand-up pouches. Their market share is likely to keep increasing, due to the need to improve recycling rates. Many developers are developing mono-material packag- ing solutions, containing only PE, for instance. Other solutions make greater use of PE-derived feedstocks. For instance, SABIC has teamed up with flexfilm manufacturer Polivouga and seafood producer Nueva Pescanova to develop frozen food packag- ing using post-consumer plastic waste. The plastic, recovered from areas up to 50km


inland from waterways, is converted into an alternative feedstock. This is then used to make linear low-density polyethylene (LLDPE) and low density polyethylene (LDPE), which Polivouga converts into flexible packaging film to package frozen seafood. “This demonstrates how used plastic can be


brought back into a circular material stream to be converted into high quality food packaging,” said Sami Al-Osaimi, vice president of PE and sales at SABIC. The certified circular polymers form part of


SABIC’s Trucircle portfolio. Tiago Barros, CEO of Polivouga, added: “Besides delivering a food-contact approved polyolefin


www.filmandsheet.com


product, these PE films ensure the same tear- and puncture-resistance as competing PE packaging structures made from virgin fossil PE resins.” In a separate project, Mars Petcare and Huhtamaki have developed cat food packaging using polypropylene (PP) from the Trucircle portfolio.


Huhtamaki produces a multi-layer flexible film


structure – using PP BCT18F impact copolymer – to make retort pouches, which is then used to package wet pet food products for Sheba, a Mars brand. “The fact we are now able to introduce recycled content into our Sheba pouches helps us accelerate our journey to achieve 30% average recycled content in our plastic packaging, and to reduce by 25% our use of virgin plastic,” said Barry Parkin, chief procurement and sustainability officer at Mars. Marco Hilty, president of Huhtamaki’s flexible


packaging division, added: “Processing recycled polymers into easy-tear films for wet retort packag- ing at an industrial scale is a significant milestone in delivering on our ambition to have more than 80% of our raw materials renewable or recycled.”


Software update Nova Chemicals has launched version 5.0 of its proprietary Bonfire film development platform, for modelling and simulating multilayer films. The free tool for Nova Chemicals customers and value chain collaborators helps designers and


April 2022 | FILM & SHEET EXTRUSION 13


Main image: SABIC has used post-consumer plastic waste to develop food packaging for frozen seafood


IMAGE: SABIC


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