Abstract: A filter medium for fluid filtration, said filter medium having two layers, including at least one coarse filter layer and a fine filter layer which is arranged downstream of the coarse filter layer in the through-flow direction. The coarse filter layer and the fine filter layer are connected to one another without the use of chemical binding agents. The coarse filter layer and the fine filter layer are each a polymer non-woven of thermoplastic polymer fibres. The fibre fineness of the thermoplastic polymer fibres in the fine filter layer is greater than the fibre fineness of the thermoplastic polymer fibres in the coarse filter layer. The thermoplastic fibres of the coarse filter layer as well as the thermoplastic layers of the fine filter layer are melt-blown fibres.

Abstract: A multilayer, pleatable, filter material is made of at least one melt-blown, fleece layer and at least one carded, fleece layer that are attached to one another without use of adhesives for filtering solid particles out of fluids, in particular, filtering solid particles out of gases, where the carded fleece has compacted and uncompacted sections, the melt-blown fleece is preferably attached to the carded fleece at the latter's uncompacted sections by means of multimicrofilament strands, and the filter material contains micropockets for storing dust.

Abstract: A multilayer, pleatable, filter material is made of at least one melt-blown, fleece layer and at least one carded, fleece layer that are attached to one another without use of adhesives for filtering solid particles out of fluids, in particular, filtering solid particles out of gases, where the carded fleece has compacted and uncompacted sections, the melt-blown fleece is preferably attached to the carded fleece at the latter's uncompacted sections by means of multimicrofilament strands, and the filter material contains micropockets for storing dust.