METHOD FOR PRODUCTION OF FOOD COLLAGEN FILM Russian patent published in 1998 - IPC

FIELD: methods of food edible films from collagen-containing raw material used in packing of meat and fish dishes for heat treatment of semifinished product in thermal chamber, roasting cabinet, microwave oven or in freezing. SUBSTANCE: method includes preparation of collagen forming dispersion containing from 2 to 6 wt.% of collagen dry matter; forming of film by extrusion and also tannage; plastification and drying of film up to moisture content of 15-20 wt. %. Extrusion is carried out by dry method onto base. Film with base is passed through calender. Film is dried prior to plasticizing up to moisture content of not in excess of 5 wt.%. After plastification film is removed from the base and again dried to the final content of moisture. EFFECT: higher efficiency. 1 tbl