Composite material for shielding electromagnetic radiation, raw material for additive manufacturing methods and a product comprising the composite material, as well as a method of manufacturing the product

A composite material for shielding electromagnetic radiation, comprising:

• 88-99.88 wt % of a thermoplastic, electrically non-conductive polymer,
• 0.1-10 wt % of a nanocarbon material in form of flakes having a diameter to thickness ratio higher than 3, the thickness of the flakes not exceeding 30 nm and the diameter being of 100 to 5000 nm, wherein the nanocarbon material is selected from the group consisting of flake graphene, graphene oxide, reduced graphene oxide, modified flake graphene, nanographite, and combinations thereof,
• 0.01-1 wt % of nanoparticles introducing a loss unrelated to electrical conductivity, wherein the nanoparticles are selected from the group consisting of nanoparticles of silicon carbide (SiC), nanoparticles of Fe—BN, ferrite-based nanoparticles, and combinations thereof,
• 0.01-1 wt % of an auxiliary material which allows control of a dispersion of the nanocarbon material and the nanoparticles in a polymer matrix and/or which can change the properties of the nanocarbon material and the nanoparticles,
• wherein the composite material is in form of a homogeneous mixture.