发明名称 COMPOSITE FILTER AND METHOD OF MAKING THE SAME
摘要 The invention refers to a composite filter for filtering a stream of ambient air comprising at least one non-prebonded upstream tier and one non-prebonded downstream tier, wherein the ratio of absolute pore volume of upstream tier to downstream tier RAPV > 2, and the absolute projected fiber coverage of upstream tier and of downstream tier APFC > 95%. Further, the invention refers to a method of making such a composite filter comprising the steps of (a) laying down a filtration material onto a support to form the upstream non-prebonded tier, (b) depositing onto the upstream tier the downstream non-prebonded tier, and (c) bonding the tiers to form a composite filter having a unitary stratified structure. <IMAGE>
申请公布号 PL363317(A1) 申请公布日期 2004.11.15
申请号 PL20020363317 申请日期 2002.03.01
申请人 AIRFLO EUROPE NV. 发明人 SCHULTINK JAN;SCHULTINK BAS
分类号 A47L9/10;A47L9/14;B01D39/14;B01D39/16;B01D46/12;D04H1/54 主分类号 A47L9/10
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