The aim of this work is to develop a new novel production technique for composite filaments with fillers. Due to the fact that some filler materials may not be pr°Cessed together with the fibre forming polymer during melt spinning, new technique has been developed to insert fillers into the cavity of the filament during spinning. Several successful applications have been reported in this paper.
Keywords: Filament production by melting process, Hollow filament, Filament with external cavity, Composite filament with filler.