Composite filter media including a nanofiber layer formed directly onto a conductive layer

A composite filter media of a nanofiber layer that includes nanofibers formed from non-polar, non-conductive thermoplastic polymers using a solution spinning process to form the nanofibers directly onto a conductive layer is presented, along with the associated methodology for making such media. The conductive layer includes at least about greater than about 5 wt.% conductive fibers, Z-directional conductivity and a uniform surface conductivity of at least about 10-7 microsiemens. 本发明提出了种纳米纤维层的复合过滤介质，所述纳米纤维层包括使用溶液纺丝工艺来使纳米纤维直接形成在导电层上的由非极性、非导电的热塑性聚合物形成的纳米纤维；以及用于制造此类介质的相关方法。所述导电层包括至少约大于约5wt.％的导电纤维、Z方向导电性和至少约10微西门子的均匀表面导电性。