发明名称 LAYERED FILTERING STRUCTURE
摘要 <p>A layered filtering structure (10) comprises at least a first layer (12) and a second layer (13). Each layer comprises a web of metal fibers which has been sintered. The two layers (12, 13) are in contact with each other. The first layer, most close to the filter inlet side has a porosity below 55 %, and the second layer, closer to the filter outlet side has a porosity which is at least 20 % greater than the porosity of the first layer. The first layer is compacted in a separate manufacturing step. The layered filtering structure combines the advantage of a small filter rating with a low pressure drop. <IMAGE></p>
申请公布号 EP1148926(A1) 申请公布日期 2001.10.31
申请号 EP19990968344 申请日期 1999.12.09
申请人 N.V. BEKAERT S.A. 发明人 LONCKE, JAN;VANDAMME, JOHAN
分类号 B01D39/20;B22F3/11;D04H1/42;(IPC1-7):B01D39/20 主分类号 B01D39/20
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