ALUPHONIC Thin, multi-reflector insulation composed of two layers of pure aluminium 30-microns thick, polished and treated against oxidation, separated by two layers of air bubbles placed in a honeycomb structure and enclosed in a self-extinguishing polyethylene film and a self-extinguishing and waterproof polyethylene foam. The various layer are thermally welded together over their full surface. The obtained complex is semi-rigid and consists of the following successive layers: 1. A film of pure aluminium, 30 microns thick, treated against oxidation. 2. A layer of bubbles of dry air enclosed...