Method of extruding sausage sleeves of at least partial collagen, extrusion head and extruded collagen sleeves

Method of extruding sleeves of collagen or a collagen comprising mixture for encasing sausages, comprising the successive method steps:

• A) feeding a collagen fluid to an extrusion head;
• B) guiding the collagen fluid through the extrusion head;
• and
• C) discharging the collagen fluid from the extrusion head;
• wherein during processing step B) the collagen fluid is transported between two rotatable and co-operating jackets defining an internal jacket and an external jacket and which co-operating jackets are rotated in opposite directions, characterized in that the counter rotating jackets are rotated each with a rotation speed of 150-300 rpm relative to the extrusion head;
• wherein the collagen fluid prior to step A) is mixed at about 4° C.;
• wherein the internal and external jackets define a circular slit therebetween extending a distance from about 250 micrometers to about 400 micrometers.