Blends of polyvinylalcohol with collagen hydrolysate: Properties of water-soluble blown films

The study is focused on the effect of collagen hydrolysate and glycerol on properties of water-soluble polyvinylalcohol (PVA) blown films and blends. The experimental design method (DOE) was used in this study. Results from D OE show a strong effect of interactions between the blend components on res ulting properties of the films. This fact was confirmed by means of the res ponse surfaces of melting flow index, tensile strength and the content of i nsoluble fraction. It was concluded that the composition of PVA/CH blend mu st be precisely specified to avoid the processing complications.