| 摘要 |
A diesel soot filter medium (11) comprises at least a first (12) and second layer (13). Both first and second layer have a layer volume VLq and a layer filtering surface SLq, where SLq is the accumulation of all mantle surfaces of the fibers present in this layer q. The first layer has a SL1/VL1-ratio of less than 32500m<2>/m<3>, and the second layer has a SL2/VL2-ratio being more than 1.1x SL1/VL1. <IMAGE> |
