Fraunhofer's antibacterial food packaging film kills bacteria on food by releasing sorbic acid
Researchers from Germany’s Fraunhofer Institute for Process Engineering and Packaging have developed a new type of food packaging film that kills food-inhabiting bacteria. While antimicrobial polymers in food packaging have been around for some time, the new material is unique in that it incorporates sorbic acid that has been dissolved into a lacquer, which is then deposited onto the film. When that lacquer first touches the food, a timed release of the acid begins, which neutralizes a significant number of the microorganisms on the food’s surface. The result, according to the researchers, is the ability to keep meat, fish and cheese fresher for longer.