Dust filter bag, useful in vacuum cleaner, has filter carrier material with specified air permeability, drop soak-in time and breaking, bursting and flexural strength values

摘要

In a dust filter bag with layer(s) of filter material and layer(s) of carrier material, which has a breaking strength of over 10 N lengthwise and over 3 N crosswise and a mass/unit area of 30-80 g/m 2>, the carrier material layer(s) has an air permeability of not less than 900 l/m 2> x second, bursting strength of not less than 70 kPa, flexural strength of over 0.5 cN cm 2> lengthwise and over 0.25 cN cm 2> crosswise and drop soak-in time less than 10 minutes. An independent claim is also included for the production of the dust filter bag.