Filter bag for a vacuum cleaner and a method for determining a surface of a vacuum cleaner dust bag which is directly impacted by the air flow

摘要

the present invention relates to a bag for a vacuum cleaner, comprising a filter material is formed, which includes at least three filtermateriallagen. it is in the filtermateriallagen at least one position and at least one situation scrim faservlieslage, disconnected staple fibers and / or disconnected filaments comprises.