Aluthermo® is an insulating material that works by reflection and consists of two layers separated by a honeycomb structure of air bubbles enclosed in a self-extinguishing polyethylene film, which is covered on both sides by a 30-micron thick foil of pure aluminium that has been polished and treated against oxidation. The various layers are thermally welded together over their full surface areas. The obtained complex is semi-rigid and consists of the following successive layers: A. B. C. D. A film of pure aluminium, 30 microns thick, treated against oxidation A layer of bubbles of dry air enclosed...