Abstract: The present invention relates to a polyurethane adhesive, in particular for laminating multilayer films, wherein the PU adhesive contains—based on the total weight of the adhesive—5 to 50 wt %, preferably 10 to 40 wt %, particularly preferably 20 to 30 wt % of at least one solid particulate filler, wherein at least 90% of the filler particles of the at least one filler has a particle size of 4 ?m or less, and the at least one filler has a Mohs hardness of 3 or less. The present invention also relates to the use of the adhesive for adhering films, to methods for producing composite films, and to composite films adhered using the aforementioned adhesive.