Schlauchfolien aus Cellulose-Protein-Blends

The invention relates to a method of manufacturing tubular films from a solution of a mixture of cellulose and proteins by extrusion blowing the solution over an air gap into a precipitation bath, and to the films produced with this method and their application. Tubular cellulose films have been used for centuries as packaging material, particularly in the food industry and especially also as sausage skins. The particular advantages of the cellulose films are their good biodegradability, their high water absorption and the good water-vapour transmission. In addition to this, tubular films formed from proteins are also used for food packaging, preferably as sausage skins. Die Erfindung betrifft ein Verfahren zur Herstellung orientierter Schlauchfolien durch Extrusion einer Spinnlösung mittels einer Ringdüse über einen äußeren Luftspalt in ein Füllbad. Die Spinnlösung besteht aus einer Lösung einer Mischung von Cellulose und Protein in einem NMMO-Wassersystem.