Diamide/polyolefin wax mixture comprising one or more diamides which have a structure of the formula X 1 -CO-NH-Y-NH-CO-X 2, where X 1 and X 2 are identical or different and are linear or branched, saturated or unsaturated hydrocarbon radicals having from 3 to 29 carbon atoms and at least one of the radicals X 1 and X 2 bears at least one hydroxyl group, Y is a divalent organic radical selected from the group consisting of aliphatic radicals having from 2 to 26 carbon atoms, aromatic radicals having from 6 to 24 carbon atoms or araliphatic radicals having from 7 to 24 carbon atoms and Y optionally contains secondary or tertiary amino groups; one or more carboxyl-containing polyolefin waxes which have an acid number of from 3 to 50 mg KOH/g; and optionally one or more species selected from the group consisting of (i) one or more diamides which do not come under the definition of and (ii) one or more inorganic salts, metal oxides or semimetal oxides, where the diamide or diamides are present in an amount of from 20% by weight to less than 40% by weight based on the total weight of the diamide/polyolefin wax mixture, the polyolefin wax or waxes are present in an amount of from > 60% by weight to 80% by weight based on the total weight of the diamide/polyolefin wax mixture and the species are present in an amount of from 0 to 20% by weight based on the total weight of the diamide/polyolefin wax mixture, characterized in that (a) the diamide/polyolefin wax mixture is present as particulate solid having a particle size distribution of 5 μm ≤ d 90 ≤ 100 μm, 1 μm ≤ d 50 ≤ 50 μm and 0.1 μm ≤ d 10 ≤ 20 μm, measured dry by means of laser light scattering technology, at 25°C, (b) the particles contain and and, if is present in an amount of more than 0% by weight, based on the total weight of the diamide/polyolefin wax mixture, likewise and (c) the sum of the percentages by weight of the diamides and (i) is less than 40% by weight, based on the total weight of the diamide/polyolefin wax mixture. one or more diamides which have a structure of the formula X 1 -CO-NH-Y-NH-CO-X 2, where X 1 and X 2 are identical or different and are linear or branched, saturated or unsaturated hydrocarbon radicals having from 3 to 29 carbon atoms and at least one of the radicals X 1 and X 2 bears at least one hydroxyl group, Y is a divalent organic radical selected from the group consisting of aliphatic radicals having from 2 to 26 carbon atoms, aromatic radicals having from 6 to 24 carbon atoms or araliphatic radicals having from 7 to 24 carbon atoms and Y optionally contains secondary or tertiary amino groups; X 1 and X 2 are identical or different and are linear or branched, saturated or unsaturated hydrocarbon radicals having from 3 to 29 carbon atoms and at least one of the radicals X 1 and X 2 bears at least one hydroxyl group, Y is a divalent organic radical selected from the group consisting of aliphatic radicals having from 2 to 26 carbon atoms, aromatic radicals having from 6 to 24 carbon atoms or araliphatic radicals having from 7 to 24 carbon atoms and Y optionally contains secondary or tertiary amino groups; one or more carboxyl-containing polyolefin waxes which have an acid number of from 3 to 50 mg KOH/g; and optionally one or more species selected from the group consisting of (i) one or more diamides which do not come under the definition of and (ii) one or more inorganic salts, metal oxides or semimetal oxides, (i) one or more diamides which do not come under the definition of and (ii) one or more inorganic salts, metal oxides or semimetal oxides, the diamide or diamides are present in an amount of from 20% by weight to less than 40% by weight based on the total weight of the diamide/polyolefin wax mixture, the polyolefin wax or waxes are present in an amount of from > 60% by weight to 80% by weight based on the total weight of the diamide/polyolefin wax mixture and the species are present in an amount of from 0 to 20% by weight based on the total weight of the diamide/polyolefin wax mixture, characterized in that (a) the diamide/polyolefin wax mixture is present as particulate solid having a particle size distribution of 5 μm ≤ d 90 ≤ 100 μm, 1 μm ≤ d 50 ≤ 50 μm and 0.1 μm ≤ d 10 ≤ 20 μm, measured dry by means of laser light scattering technology, at 25°C, (b) the particles contain and and, if is present in an amount of more than 0% by weight, based on the total weight of the diamide/polyolefin wax mixture, likewise and (c) the sum of the percentages by weight of the diamides and (i) is less than 40% by weight, based on the total weight of the diamide/polyolefin wax mixture. (a) the diamide/polyolefin wax mixture is present as particulate solid having a particle size distribution of 5 μm ≤ d 90 ≤ 100 μm, 1 μm ≤ d 50 ≤ 50 μm and 0.1 μm ≤ d 10 ≤ 20 μm, measured dry by means of laser light scattering technology, at 25°C, (b) the particles contain and and, if is present in an amount of more than 0% by weight, based on the total weight of the diamide/polyolefin wax mixture, likewise and (c) the sum of the percentages by weight of the diamides and (i) is less than 40% by weight, based on the total weight of the diamide/polyolefin wax mixture.