Process and device for producing cellulose films

Details Process and device for producing cellulose films Process and device for producing cellulose films

B - Operations, Transporting

29

C

B29C 47/88 (2006.01) A22C 13/00 (2006.01) B29C 47/00 (2006.01) C08J 5/18 (2006.01)

Patent

CA 2149218

- 12 - ABSTRACT: Summary Device for the preparation of cellulose sheet by extrusion of a heated solution of cellulose in a tertiary amine-oxide, which device comprises an extrusion die with an extrusion orifice, characterised in that, immediately below the extrusion orifice there is provided an inlet for cooling gas to cool the extruded sheet. The device according to the invention is especially suitable for the preparation of cellulose tubular films (Figure 2).

Un dispositif permet de produire des feuilles en cellulose par extrusion d'une solution chauffée de cellulose dans un oxyde d'amine tertiaire. Ce dispositif comprend une filière d'extrusion avec une fente d'extrusion (15) et se caractérise en ce qu'une amenée de gaz de refroidissement (2C) est située directement au-dessous de la fente d'extrusion afin de refroidir la feuille extrudée. Ce dispositif est particulièrement utile pour produire des feuilles en gaine.

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