Protective adhesive films

A protective adhesive film comprising a support layer and an adhesive layer, wherein the adhesive layer is formed of an adhesive composition essentially consisting of:

• (A) at least one compound selected from the group consisting of a low density free-radical polyethylene;
• a copolymer of ethylene and a C3-C8 olefinic monomer;
• an ethylene/propylene copolymer;
• an ethylene/propylene/diene;
• an ethylene/vinyl acetate copolymer;
• a copolymer of ethylene and an acrylic derivative;
• a styrene/ethylene-butylene/styrene copolymer;
• a styrene/butadiene/styrene copolymer;
• a styrene/isoprene/styrene copolymer;
• an ethylene/styrene copolymer;
• a tackifying resin;
• and mixtures thereof;
• and
• (B) polybut-1-ene or a mixture of polybut-1-ene and a block copolymer containing at least two poly(monovinylic aromatic hydrocarbon) blocks and at least one hydrogenated poly(conjugated diene) block.