Device and method for making a segmented tubular capsule...

A - Human Necessities – 61 – K

Patent

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Details

A61K 9/48 (2006.01) A61J 3/00 (2006.01) A61J 3/07 (2006.01) A61K 9/00 (2006.01) A61K 9/66 (2006.01) A61K 35/12 (2006.01) A61L 27/14 (2006.01) A61L 27/38 (2006.01) A61L 27/54 (2006.01) B01J 13/02 (2006.01) C08J 5/00 (2006.01) A61F 2/02 (2006.01)

Patent

CA 2265442

The invention concerns a method for making a tubular capsule comprising a fibre (11) having a wall defining internal compartments (11b) isolated from one another, the wall being made from a solution of at least one polymer and the compartments (11b) being filled with a biologically active medium. The method consists in the following steps: co-extruding the solution of at least one polymer and the biologically active medium by simultaneous injection of the polymer solution and the biologically active medium in a die (7) with set dimensions; interrupting at set time intervals the injection of the biologically active medium to provide in the fibre (11) successive compartments (11b) filled with the biologically active medium and separated by a solid intermediate section (11a) only made of the polymer solution; immersing the fibre (11) in the coagulating liquid as it comes out of the die (7) so as to start a precocious coagulation in the polymer solution outside the fibre; and simultaneously driving the fibre (11) in the coagulating liquid along a set path.

Procédé de fabrication d'une capsule tubulaire comprenant une fibre (11) ayant paroi délimitant des compartiments (11b) internes isolés les uns des autres, la paroi étant faite à partir d'une solution d'au moins un polymère et les compartiments (I lb) étant remplis d'un milieu biologiquement actif, le procédé comprenant les étapes de: coextruder la solution d'au moins un polymère et le milieu biologiquement actif par injection simultanée de la solution de polymère et du milieu biologiquement actif dans une filière (7) ayant des dimensions déterminées; interrompre à intervalles de temps déterminés l'injection du milieu biologiquement actif pour ménager dans la fibre (11) des compartiments (11b) successifs remplis par le milieu biologiquement actif et séparés par un tronçon (11a) intercalaire plein constitué uniquement de la solution de polymère; immerger la fibre (11) dans un liquide de coagulation au sortir de la filière (7) de façon à initier une coagulation précoce de la solution de polymère par l'extérieur de la fibre (11); et entraîner simultanément la fibre (11) dans le liquide de coagulation selon un trajet déterminé.

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