| abstract |
There is provided a vacuum cleaner bag with high fine particle removal efficiency under normal and shock loading conditions, shock loading including a short term challenge with high particle concentrations (e.g., when a vacuum is used to pick up a pile of debris). The bag also exhibits high loading capacity without significant loss in pressure drop. The bag includes an outer support layer, a fibrous filter layer that is charged to create electrets, and an inner diffusion layer that is substantially unbonded to the filter layer, except at necessary bag seams required for assembly of the filter bag. |