发明名称 |
HIGH EFFICIENCY SYNTHETIC FILTER MEDIUM |
摘要 |
<p>A high efficiency filtration medium comprised of a nonwoven filter web of electret charged fibers of a nonconductive thermoplastic resin having a resistivity greater than 1014 ohm-cm, preferably polypropylene. The nonwoven filter web has a basis weight (BW) of less than 60 grams/m2, an effective fiber diameter (EFD) of less than 5 microns and a penetration (PEN) of less than 0.03%, wherein the ratio); BW/(EFD.PEN) is greater than 200. The invention filter medium can be easily used in applications requiring HEPA performance at relatively low pressure drops.</p> |
申请公布号 |
EP1117467(A1) |
申请公布日期 |
2001.07.25 |
申请号 |
EP19990968639 |
申请日期 |
1999.02.16 |
申请人 |
MINNESOTA MINING AND MANUFACTURING COMPANY |
发明人 |
WU, TIEN, T.;KINDERMAN, RICHARD;ABOLHASSAN, SEYED |
分类号 |
B01D39/14;B01D39/16;D01F6/46;D04H1/42;D04H3/16;(IPC1-7):B01D39/04 |
主分类号 |
B01D39/14 |
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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