Preparation and Properties of Whey Protein Packaging Film

A protein packaging film was successfully prepared using whey protein concentrate (WPC) as raw material. Protein concentration, plasticizers concentration and temperature were discussed. Research results show that the increasing of protein concentration lead to decreasing barrier properties of WPC film but improving its mechanical properties. Though barrier properties of WPC film lost to some extent owing to addition of glycerol, its extensibility was greatly improved. When heating temperature is 80°C, the barrier properties and tensile strength of WPC film come to the best. Response surface analyses indicate that WPC film shows the optimal packaging performance when concentration of WPC is 10.2%, heating temperature is 82°C and concentration of glycerol is 2.7%.