TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Composition: The secondary layer contains calcium carbonate, talc, aluminum trihydroxide, titanium dioxide and/or carbon black.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The crosslinking agent is peroxide, binding agent such as silane and/or ultraviolet and thermal stabilizing additive.    TECHNOLOGY FOCUS - POLYMERS - Preferred Layers: The secondary layer acts as barrier against the migration of substances from the primary layer towards adhesive layer, and acts as barrier against the passage of any residues of solvent or not completely cross-linked adhesive from the adhesive layer toward primary layer. Preferred Composition: The secondary layer contains polymer with high resistance to deformation when heated, and migration of peroxides and silanes, ultraviolet and thermal stabilizing additive chosen from sterically hindered amine, TINUVIN 770 (RTM: bis(2,2,6,6-tetramethyl-4-piperidyl)sebaceate), benzophenone-type ultraviolet additive, CYASORB UV-531 (RTM: 2-hydroxy-4-n-octoxybenzophenone) and IRGAFOS 168 (RTM: tris(2,4-di-tert-butylphenyl) phosphite), and amorphous thermoplastic polymer having glass transition temperature of more than 105 degrees C. The polymer contained in secondary layer comprises semicrystalline thermoplastic polymer having melting point of more than 95 degrees C. The amount of semicrystalline thermoplastic polymer is 100%. The semicrystalline thermoplastic polymer is low-density polyethylene, low-density linear polyethylene and/or high-density polyethylene, or ethyl vinyl acetate, ethylene methyl acrylate and/or ethyl butyl acrylate, preferably less than 6% of vinyl acetate. The integrated backsheet of multilayer film contains pigments and colors. The primary layer contains thermoplastic polymer containing crosslinking agent. The thermoplastic polymer is Elvax 150W (RTM: ethylene vinyl acetate). The thermoplastic polymer without crosslinking agent contained in primary layer is ethylene methylacrylate. The polymeric multilayer film further has tertiary layer which acts as binder, and is formed between primary layer and secondary layer. The tertiary layer contains mixture of polymer contained in primary layer and secondary layer, or copolymer ethylene vinyl acetate linked with maleic anhydride, copolymer of ethylene vinyl acetate linked with glycidyl methacrylate. The tertiary layer contain oxygen barrier polymer, such as ethylene vinyl alcohol and/or polyamide. The adhesive layer contains polyurethane adhesive, polyester adhesive and/or epoxy adhesive. Preferred Properties: The secondary layer has thickness of 75-125 mu m, water vapor permeability of less than 5 g/m2 per day, at 23 degrees C and 85/15 relative humidity and Young's modulus of more than 100 MPa. The semicrystalline thermoplastic polymer has melt flow rate of less than 5 g/10 minutes at 190 degrees C and load of 2.16 kg. The primary layer has thickness of 250-500 mu m. Preferred Process: The outer surface of the secondary layer is subjected to pretreatment such as corona treatment, flame treatment, plasma treatment and/or priming.