TWB 04/12 Whey protein based barrier coatings
A whey protein-based barrier film was successfully thermoformed in a laminate with PVC. The protein-based formulation was applied to the substrate as lacquer, dried and the laminate was thermoformed. The excellent barrier properties of the whey protein coating provides a material reduction of a 180 µm uncoated PVC cup to a 100 µm coated cup and is suitable for MAP systems for fresh meat according to its oxygen permeability below 20 cm³ (STP) 100 µm m-2 d-1 bar-1. As whey protein is also a renewable and biodegradable raw material, this innovative material contributes to sustainability with regards to lower material usage and substitution of conventional materials.
Keywords: Whey protein - barrier coating - PVC - thermoforming - MAP packagingSchlagworte: Molkeprotein - Barrierebeschichtung - PVC - Warmformen - Schutzgasverpackungen