Filter Medium, Particularly an Air Filter Medium and Filter Element, Particularly an Air Filter Element, Having a Filter Medium

摘要

A filter medium is provided with a first filter layer and a second filter layer that is arranged downstream of the first filter layer in a flow-through direction of the filter medium and has nanofibers. The first filter layer has a first filter layer section and a second filter layer section, wherein the second filter layer section is arranged downstream of the first filter layer section in the flow-through direction of the filter medium. The first filter layer section has a first packing density of fibers and the second filter layer section has a second packing density of fibers deviating from the first packing density of fibers.