Reactive adhesive film comprising (a) a polymeric film-former matrix, (b) one or more reactive monomers (M -M (n) ) and (c) a reagent selected from an initiator, more particularly a radical initiator, or an activator, characterized in that the one or the two or more reactive monomers (M -M (n) ) are selected from the groups (b1) to (b4): (b1) : 4-acryloylmorpholine, 4-methacryloylmorpholine, 2-hydroxy-3-phenoxypropyl acrylate, 2-hydroxy-3-phenoxypropyl methacrylate, (5-ethyl-1,3-dioxan-5-yl)methyl acrylate; (b2) : 3,3,5-trimethylcyclohexyl methacrylate, 4-(1,1-dimethylethyl)cyclohexyl methacrylate; (b3) : a poly(ethylene glycol) phenyl ether methacrylate of the general formula (I): where n is 2 to 10; a poly(ethylene glycol) phenyl ether methacrylate with single or multiple alkyl substitution on the phenyl group, of the general formula (II): where n is 2 to 10 and R 1 , R 2 , R 3 , R 4 and R 5 independently of one another are H or C 1 -C 14 alkyl; (b4) : a poly(ethylene glycol) phenyl ether acrylate of the general formula (III): where n is 2 to 10; a poly(ethylene glycol) phenyl ether acrylate with single or multiple alkyl substitution on the phenyl group, of the general formula (IV): where n is 2 to 10 and R 1 , R 2 , R 3 , R 4 and R 5 independently of one another are H or C 1 -C 14 alkyl; the total fraction of the one or of the two or more reactive monomers (M -M (n) ) selected from the groups (b1) to (b4) among all reactive monomers contained in the reactive adhesive film is at least 50 per cent by weight; and in that the polymeric film-former matrix (a) comprises a thermoplastic polyurethane. (b1) : 4-acryloylmorpholine, 4-methacryloylmorpholine, 2-hydroxy-3-phenoxypropyl acrylate, 2-hydroxy-3-phenoxypropyl methacrylate, (5-ethyl-1,3-dioxan-5-yl)methyl acrylate; (b2) : 3,3,5-trimethylcyclohexyl methacrylate, 4-(1,1-dimethylethyl)cyclohexyl methacrylate; (b3) : a poly(ethylene glycol) phenyl ether methacrylate of the general formula (I): where n is 2 to 10; a poly(ethylene glycol) phenyl ether methacrylate with single or multiple alkyl substitution on the phenyl group, of the general formula (II): where n is 2 to 10 and R 1 , R 2 , R 3 , R 4 and R 5 independently of one another are H or C 1 -C 14 alkyl; (b4) : a poly(ethylene glycol) phenyl ether acrylate of the general formula (III): where n is 2 to 10; a poly(ethylene glycol) phenyl ether acrylate with single or multiple alkyl substitution on the phenyl group, of the general formula (IV): where n is 2 to 10 and R 1 , R 2 , R 3 , R 4 and R 5 independently of one another are H or C 1 -C 14 alkyl; the total fraction of the one or of the two or more reactive monomers (M -M (n) ) selected from the groups (b1) to (b4) among all reactive monomers contained in the reactive adhesive film is at least 50 per cent by weight; and in that the polymeric film-former matrix (a) comprises a thermoplastic polyurethane. the total fraction of the one or of the two or more reactive monomers (M -M (n) ) selected from the groups (b1) to (b4) among all reactive monomers contained in the reactive adhesive film is at least 50 per cent by weight; and in that the polymeric film-former matrix (a) comprises a thermoplastic polyurethane. <EOS>