Palsgaard developed Einar® 611, a plant-based food-grade anti-fog additive that prevents the condensation of moisture on the inside of film packaging at low concentration levels and improves the sustainability of PE film formulations. The solution optimizes product shelf-life, aesthetics, safety and the sustainability of the sensitive food pack, Palsgaard highlights.
The anti-fog surfactant was specified by a major Korean supplier of food-grade polyethylene (PE) film solutions. The requirement: a cold anti-fog additive that would effectively protect the packaged food from spoilage by preventing the 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 cost-effectively 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 minimize 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, experimental and trial data was shared between the partners to optimize and validate the film solution. Palsgaard’s Polymer Application Center in Denmark was involved in the process, to help assess the right concentration level of Einar® 611 in this application.
“As a renewable polyglycerol ester made from vegetable oils that are not competing with food or feed sources, Einar® 611 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 designed for sensitive food packaging. With anti-fog performance matching or exceeding that of non-vegetable fossil-based incumbents, it delivers excellent results in LDPE and LLDPE as well as coextruded and laminated PE film at low loading levels (typically 0.2% to 0.4%) for both cold-fog and hot-fog applications. Moreover, it has proven itself as an ideal additive in PE masterbatches and shows no adverse effects on the mechanical, optical or barrier properties of the film, while offering high heat resistance and low volatility. The bio-based anti-fog surfactant is available in paste form,” explains Palsgaard.
Photo credit: Palsgaard