Multi-layer material comprising flexible graphite which is reinforced mechanically, electrically and thermally by a metal and a process for the production thereof

A multi-layer material comprising at least two layers of flexible material, including one said layer designated "C" of electrically conductive expanded recompressed graphite and another said layer of metal and designated "M", wherein the layer of material C has at least one face thereof covered in its entirety by a layer of metal M and is in direct electrical contact with said layer of metal M, and wherein said layer of metal M is obtained by electrodeposition or by chemical deposit of at least one metal M directly onto the face of said layer of material C in such a way that the metal M adheres directly to the face of the layer of material C and closely matches the face in micro-relief.