发明公开
- 专利标题： IMPROVED LIQUID FILTRATION MEDIA
- 专利标题（中）： 改进的液体过滤介质
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申请号： EP08742027.9申请日： 2008-03-06
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公开(公告)号： EP2121164A1公开(公告)日： 2009-11-25
- 发明人: CHEN, Guanghui , GOMMEREN, Henricus, Jacobus, Cornelis , KNORR, Lawrence, Mark
- 申请人： E. I. Du Pont de Nemours and Company
- 申请人地址： 1007 Market Street Wilmington, DE 19898 US
- 专利权人： E. I. Du Pont de Nemours and Company
- 当前专利权人： E. I. Du Pont de Nemours and Company
- 当前专利权人地址： 1007 Market Street Wilmington, DE 19898 US
- 代理机构： Morf, Jan Stefan
- 优先权： US905283P 20070306
- 国际公布： WO2008109117 20080912
- 主分类号： B01D39/16
- IPC分类号： B01D39/16 ; B01D46/54
摘要：
A liquid filter with a composite medium that has a nanoweb adjacent to and optionally bonded to a microporous membrane. The membrane is characterized by an LRV value of 3.7 at a rated particle size, and the nanoweb has a fractional filtration efficiency of greater than 0.95 at the rated particle size of the membrane. The nanoweb also has a thickness efficiency ratio of greater than 0.01 at that efficiency. The nanoweb acts to provide depth filtration to the membrane, prefilters particles and extends the lifetime of the membrane.
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