Self-adhesive air cushion film as protection for fresh varnishes during vehicle assembly and manufacturing method

The self-adhesive air cushion film (5) comprises a first carrier film (1), on whose first side an external film made of polypropylene, polypropylene-dominated polyolefin blends or propylene-dominated olefin copolymers is applied and on whose second side a second bubble-forming carrier film (2) is present, where the second side is opposite to the first side. The bubbles are filled with air. A polyethylene sheet (3a) is inseparably and partially applied to the bubbles. A self-adhesive layer is applied to the polyethylene sheet. The external film made of polypropylene has a sealing layer. The self-adhesive air cushion film (5) comprises a first carrier film (1), on whose first side an external film made of polypropylene, polypropylene-dominated polyolefin blends or propylene-dominated olefin copolymers is applied and on whose second side a second bubble-forming carrier film (2) is present, where the second side is opposite to the first side. The bubbles are filled with air. A polyethylene sheet (3a) is inseparably and partially applied to the bubbles. A self-adhesive layer is applied to the polyethylene sheet. The external film made of polypropylene has a sealing layer that is made of polyethylene or modified polyethylene towards the first carrier film. The external film made of polypropylene contains 50 wt.% of polypropylene if it consists of a blend of polyolefins, 50 mol.% of propylene if it is olefin copolymers, and 50 mol.% of propylene if it a blend of olefin copolymers or olefin copolymers and olefin-homopolymers. The external film and the sealing layer are produced by coextrusion. An adhesion promoter layer (3b) is present between the sheet and the self-adhesive layer. The external film, the first carrier film, the second carrier film and/or the sheet contain a light stabilizer in an amount of 0.15 wt.% and/or titanium dioxide in an amount of 5-15 wt.%. The first and/or second carrier film has a three-layer construction made of polyethylene sheet/barrier layer/polyethylene sheet. The self-adhesive compound is composed of polyethylene-vinyl acetate at a vinyl acetate content of 70 wt.%, and has a loss angle tan delta of 0.6-1.0 measured at a temperature of 60[deg] C and a frequency of 10 -> 2> Hz and tan delta of 0.4-0.7 measured at a temperature of 60[deg] C and a frequency of 10 Hz. The self-adhesive layer is mixed with additives such as tackifiers, plasticizers, organic or inorganic fillers, pigments, light stabilizers in the form of UV-absorbing st