VACUUM CLEANER FILTER BAG

摘要

The vacuum cleaner filter bag has prefilter layer (8) and fine filter layer (9). The prefilter layer is arranged upstream of the fine filter layer in air flow direction. The prefilter layer has 5-15 individual plies (81-83). Each individual ply is a dry-laid nonwoven having a basis weight of 8-30 g/ m2>.