ColorFabb (Venlo, The Netherlands) has introduced XT-CF20, an additive manufacturing filament based on the Amphora 3D copolyester (from Eastman Chemical) reinforced with carbon fiber at loadings of up to 20%. XT-CF20, which prints with a matte finish, offers a flex modulus of 6.2 GPa, strain at break of 8-10%, Tg of 80°C, high melt strength, high melt viscosity, low odor, compatibility with several 3D printing platforms and diameters of 1.75 mm or 2.85 mm. ColorFabb notes that carbon fiber's abrasiveness requires use of stainless steel or hardened copper alloy nozzles on printing heads.
Editor PickMelt-spinning carbon fiber precursor begins in Australia
Australian R&D center CSIRO is working on melt-spinning polymers to produce precursors for carbon fiber. Polymers being used include polyacrylonitrile, cellulose, lignin and blends of these materials. Q&A with Derek Buckmaster.