FORMULATION AND COMPOUNDING | BIOPLASTICS


standard packaging machines. According to BillerudKorsnäs Business Develop- ment Manager Markus Saari: “Our joint develop- ment represents a shift to paper-based and compostable material in order to replace tradition- al laminates for food packaging — meeting hygiene and barrier requirements, maintaining form and enabling many design possibilities just like conventional packaging but with the decisive added benefit that it is home-compostable.” The BillerudKorsnäs cooperation followed


BASF’s announcement of a solution developed with the Italian Fabbri Group for a stretch film based on Ecovio. It says Fabbri’s Nature Fresh film can be used to wrap meat and seafood, as well as fruit and vegetables. “It is the first certified com- postable cling film that combines optimal breatha- bility for an extended shelf life of fresh food with high transparency and excellent mechanical properties for automatic packaging,” claims BASF.


Compounding PLA Continuous mixer maker Farrel Pomini has carried out a study together with Natureworks that builds on work published in 2018 that compared process- ing of PLA with high talc loading levels – and the consequent effect on molecular weight retention and processing temperatures — when using a Farrel Pomini CPeX laboratory scale compact processor and a small twin-screw extruder (TSE). The study showed that superior molecular weight retention results with low melt temperatures when process- ing on the CPeX (the findings were summarised in Compounding World Sept 2019). The follow-up study was conducted on a


production-sized CP550 Compact Processor. It used the same formulations and process param- eters as the original in order to confirm the results of talc loading levels with respect to molecular weight and processing temperatures, and also to determine the output rate.


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PLA/talc melt temperature as a function of talc concentration for PLA processed in a Farrel Pomini CP550 Compact Processor with and without EBS compared to results from a lab scale CPeX compact processor Source: Farrel Pomini


Effects of talc loading level on Mw retention for PLA processed in a Farrel Pomini CP550 Compact Processor with and without EBS compared to results from a lab scale CPeX compact processor and small twin screw extruder Source Farrel Pomini


Are You Ready for a Sustainable Future?


Die plate rheologically designed to meet the specific needs of biopolymers


Special solutions available to combat the corrosive impact of plant-based acids in the polymer


WWW.NORDSONPOLYMERPROCESSING.COM


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