Composite nanofibres (1) are disclosed, having two connected dissimilar polymer strands (2, 3). Each of the strands (2, 3) has at least of a portion of its surface (5, 6) exposed on the surface of the composite nanofibre (1). Apparatus for forming such nanofibres is also disclosed, in the form of a spinneret (7) having inclined channels (8, 11).Linvention concerne des nanofibres composites (1) comprenant deux brins (2, 3) de polymère dissemblables reliés ensemble. Au moins une partie de la surface (5, 6) de chacun des brins (2, 3) est découverte à la surface de la nanofibre composite (1). Linvention concerne également un appareil de formation de telles nanofibres, sous la forme dune filière (7) comprenant des canaux inclinés (8, 11).
