发明名称 |
High efficiency synthetic filter medium |
摘要 |
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.
|
申请公布号 |
US6123752(A) |
申请公布日期 |
2000.09.26 |
申请号 |
US19980146627 |
申请日期 |
1998.09.03 |
申请人 |
3M INNOVATIVE PROPERTIES COMPANY |
发明人 |
WU, TIEN;KINDERMAN, RICHARD;ANGADJIVAND, SEYED |
分类号 |
B01D39/14;B01D39/16;D01F6/46;D04H1/42;D04H3/16;(IPC1-7):B03C3/28 |
主分类号 |
B01D39/14 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|