| 摘要 |
Process for the preparation of cellulose sheet comprising the steps of: providing a heated solution of cellulose in tertiary amine oxide, extruding the solution through an extrusion die having an extrusion slit, cooling the extruded solution by exposing the solution to a gas stream applied to the extruded solution immediately after extrusion and prior to introducing the extruded solution into a precipitation bath, and conveying the extruded solution to a precipitation bath. A device for producing cellulose films has an extrusion die with an extrusion slit (5) and is characterised in that a coolant gas supply (2a, 2b, 2c, 11a) for cooling the extruded film (3a, 3b) is arranged directly underneath the extrusion slit. |
