Image courtesy of VTT VTT is testing Thermocell plastic film made of cellulose and fatty acids in the production of food packaging with Arla Foods, Paulig, and Wipak. VTT is testing Thermocell plastic film made of cellulose and fatty acids in the production of food packaging in cooperation with Arla Foods, Paulig, and Wipak. Made from renewable components, Thermocell plastic material is used in the same way as fossil-based plastic. Thanks to the development work, many features of the film already meet the requirements of the food industry, and cooperation has advanced to the testing of industrial production. Renewable origin and recyclability of packaging materials are of increasing interest to both consumers and packers. Bio-based options are being sought for oil-based, or fossil-based plastics, which could be worked, used, and recycled like traditional plastics. One emerging solution is cellulose, the structural ingredient in plants which, like plastics, is composed of large polymer molecules. When cellulose is extracted from wood, it does not compete with food production, as many other biomaterials do. In addition, efficient production methods have already been established in the production of cellulose. However, cellulose as such has lacked one important feature of packaging plastic: thermoplasticity.