CELLULOSE FOOD CASING MANUFACTURING METHOD

摘要

The tubular extrusion of a thermoplastic nonderivatized cellulose solution about a mandrel and through a long air gap in excess of 304 mm is facilitated by use of a mandrel which is extensible from the extrusion die. On extrusion start-up, the mandrel extends a short length from the die. For steady-state operation, the mandrel is extended its full length from the die . Also disclosed is a mandrel structure to facilitate the introduction of a nonsolv ent liquid into the interior of the extruded tube at a high location on start-up of ext rusion and at a lower location during steady-state operation.