发明名称 |
ZWEI- ODER MEHRSCHICHTIGES VLIESSTOFFMATERIAL, INSBESONDERE MIT LANGZEITFILTEREIGENSCHAFTEN, SOWIE VERFAHREN ZU SEINER HERSTELLUNG |
摘要 |
<p>A description is given of a multi-layer filter material composed of non-woven fabrics, which are prepared from fibres or filaments of identical or different polymers, the filter material being composed of a deep bed filter and a fine filter, both of which have a homogeneous density perpendicular to their surface, and are connected together in such a manner that the surface occupied by the connection points does not exceed 75% of the total filter surface. …<??>The deep bed filter has a thickness 2- to 20-times that of the fine filter layer and the deep bed layer and the fine filter layer have a different packing density. …<??>A process for the production of the filter material is also described.</p> |
申请公布号 |
DE3940264(A1) |
申请公布日期 |
1991.06.13 |
申请号 |
DE19893940264 |
申请日期 |
1989.12.06 |
申请人 |
HOECHST AG, 6230 FRANKFURT, DE |
发明人 |
SEILER, KURT, DIPL.-ING., 6941 ABTSTEINACH, DE;HEIDEL, PETER, DR., 8903 BOBINGEN, DE |
分类号 |
B01D39/08;B01D39/14;B32B5/12;D04H3/011;D04H3/02;D04H3/12;D04H13/00 |
主分类号 |
B01D39/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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