Device and method for producing cellulose tubular films

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 47/00 (2006.01) B29C 47/20 (2006.01)

Patent

CA 2255638

The invention concerns a device for producing cellulose tubular films by extruding a solution of cellulose in an aqueous tertiary amine oxide into a precipitating agent located beneath the device which is comprised of an extrusion nozzle with an essentially annular extrusion gap; a supply line for precipitating agent and a drain for said precipitating agent is provided in the interior of the ring formed by the extrusion slot; this device is characterized in that the supply line (3) for the precipitating agent ends below the drain (4) for said precipitating agent.

L'invention concerne un dispositif pour produire des films tubulaires cellulosiques, par extrusion d'une solution de cellulose dans un oxyde d'amine tertiaire aqueux, dans un précipitant se trouvant sous ledit dispositif, ce dernier comprenant une filière d'extrusion avec une fente d'extrusion essentiellement annulaire. Une conduite d'amenée pour le précipitant et une conduite d'évacuation pour le précipitant utilisé sont prévues à l'intérieur de l'anneau formé par la fente d'extrusion. Ce dispositif est caractérisé en ce que la conduite d'amenée (3) pour le précipitant se termine sous la conduite d'évacuation (4) pour le précipitant utilisé.

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