| abstract |
Adsorptive filter medium (filter unit or filter structure) (FM), in particular for the purification of gases and / or gas mixtures, preferably air, and / or in particular for the removal of chemical and / or biological poisons and / or pollutants from gases and / or gas mixtures, preferably Air, the filter medium (FM) - A plurality of a first filter element (1) with a first adsorption material (3), in particular in the form of adsorbent particles, and A plurality of a second filter element (2), which differs from the first filter element (1), with a second adsorption material (3 '), in particular in the form of adsorbent particles, having, wherein the first filter element (1) and the second filter element (2) have mutually different pressure losses and / or mutually different (through) flow resistances. |