Abstract: A device for manufacturing tubular fibre includes an extrusion head through which a polymer and a biologically active material flow. The biologically active material is encapsulated within compartments formed in the fibre. Partial solidification is caused by structure, such as a coagulation bath, adjacent the extrusion head. This prevents breakage of the fibre as it leaves the head.

Abstract: Method of manufacturing a tubular capsule comprising fiber (11) having a wall delimiting internal compartments (11b) that are isolated from one another, the wall being made from a solution of at least one polymer and the compartments (11b) being full of a biologically active medium, the method comprising the steps of: coextruding the solution of at least one polymer and the biologically active medium by simultaneously injecting the polymer solution and the biologically active medium through a die (7) of determined dimensions; interrupting the injection of the biologically active medium at determined points in time to form in the fiber (11) successive compartments (11b) full of the biologically active medium and separated by a solid partition section (11a) consisting only of the polymer solution; immersing the fiber (11) in a coagulation liquid as it leaves the die (7) so as to initiate early coagulation of the polymer solution around the outside of the fiber (11); and simultaneously driving the fiber (11)