The invention relates to the use of a solvent-free, 2 component adhesive for adhering sterilizable composite films, wherein the adhesive comprises a component A made from at least one pre-polymer comprised of NCO groups, said pre-polymer produced from low molecular weight polyether alcohols, polyester alcohols and/or polyalkylene alcohols having a functionality of 2 or 3, implemented having a high molar excess of TDI and removal of the unimplemented monomer diisocyanate, and a component B comprising at least one 2 or 3 functional polyesterpolyol, produced from diols and/or triols on the basis of polyethers or polyalkylene diols implemented having dicarboxylic acids and derivatives thereof, wherein at least 10 to 40 wt % must be comprised of aliphatic C8 to C20 dicarboxylic acids, and auxiliary and additive materials in at least one component A or B.