| 摘要 |
<p>The present invention relates to a filtration element for filtering a fluid medium, comprising a cylindrical rigid porous substrate having a longitudinal central axis (A) and including a plurality of channels through which the fluid medium to be filtered can flow, in order for a filtrate to be obtained at the periphery of the substrate, said channels being provided in the substrate parallel to the central axis (A) thereof and defining at least three concentric filtration areas separated from one another by a continuous porous area. The invention is characterised in that the mean thickness of the porous area (Z) closest to the central axis (A) is less than the mean thickness of the porous area (Z) closest to the periphery of the substrate (1) and, moving from the central axis (A) of the substrate towards the periphery thereof, the mean thickness of a porous area is either identical to or less than that of the next area.</p> |
