ADDITIVES | FILM
facilitate the incorporation of more recycled content in plastic packaging and durable goods.” Danish bio-derived additive producer Palsgaard
says that its recently developed Einar 611 bio- based anti-fog surfactant has been successfully specified by a major Korean supplier of food-grade PE film solutions. It says the customer had been looking for a cold anti-fog additive that would effectively protect the packaged food from spoilage by preventing formation of condensation droplets on the inside of the film. At the same time, the surfactant had to eliminate regulatory concerns with regard to its chemistry and provide superior functional performance at a cost-effective low concentration. “The importance of food packaging and its role
is ever-changing, from the mere protection of food items from the outside in nice packaging to concerns about food safety and product shelf life,” says Ulrik Aunskjaer, Global Business Director for Bio-Specialty Polymer Additives at Palsgaard. “Our plant-based Einar 611 anti-fog has proven itself a perfect choice in this PE film application to minimise the risk of moisture accumulating in small reservoirs on the inner surface of the packaging film, where bacteria could grow and then drop down and spoil the food.” In an iterative sampling process focused on the customer’s specifications and needs, comprehensive experimental and trial data was shared to optimise and validate the film solution. During this process, Palsgaard’s Polymer Application Centre in Denmark provided support in assessing the right concentration level of Einar 611 required for the application, helping to
accelerate time-to-market of the new PE food packaging film. Einar 611 is a renewable polyglycerol ester
made from vegetable oils that are said not to compete with either food or animal feed sources. It has been developed as a highly effective replacement for conventional anti-fog chemistries, such as glycerol monooleate or sorbitan esters, in demanding PE film formulations for sensitive food packaging.
With anti-fog performance matching or
exceeding that of non-vegetable fossil-based alternatives, it is said to deliver good results in LDPE and LLDPE as well as coextruded and laminated PE film at low loading levels (typically 0.2-0.4%) for both cold-fog and hot-fog applications. Available in a paste form, the company says the additive has proven to be a good option for PE masterbatches. It is said to result in no adverse effects on the mechanical, optical or barrier properties of the film while also offering high heat resistance and low volatility. The company says the long-lasting anti-fog performance of Einar 611 contributes to reducing food waste by preserving freshness. It supports a clear view of the packaged product, which promotes its consumer appeal over a longer shelf-life, and meets all global food-contact standards, including kosher and halal. In addition, it exhibits a good sustainability profile across the entire value chain from production to processing. Palsgaard also recently introduced Einar 981, an anti-fouling additive designed to eliminate the build-up of static during the PP and PE polymerisation process. In so doing, it prevents
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