These are stress-resistant coverings. Each fold is supported by a pvc frame, the fixing between frames and mantle is by welding (without adhesives). In this way, heat-sealed, stress-resistant and watertight elements are produced.
Heat sealed thermowelded: aisi 304 steel 0,5mm thick plates are fixed on each fold protecting from hot chips, welding spray, acids, etc. (Lamels 0,8mm for heavy application).