Abstract: The present invention relates to a vacuum filter bag comprising a layer containing immobilized odor-retaining particles characterized in that the abrasion loss of said odor-retaining particles caused by an air flow of 90 cm/s through a 200 cm2 specimen of said layer for two hours, measured in accordance with DIN 44956 T2, is 0 to 10% by weight of the total odor-retaining particles present before starting the air flow. The vacuum filter bags of the invention have a high dust holding capacity and an excellent long lasting odor removing effect.

Abstract: The present invention relates to a vacuum filter bag comprising a layer containing immobilized odor-retaining particles characterized in that the abrasion loss of said odor-retaining particles caused by an air flow of 90 cm/s through a 200 cm2 specimen of said layer for two hours, measured in accordance with DIN 44956 T2, is 0 to 10% by weight of the total odor-retaining particles present before starting the air flow. The vacuum filter bags of the invention have a high dust holding capacity and an excellent long lasting odor removing effect.

Abstract: A dust filter bag having a highly porous backing material ply and a method for producing the dust filter bag. The dust filter bag includes at least one filter material ply and at least one backing material ply, the backing material ply possessing an air permeability of at least 900 l/m2 x s, a burst strength of at least 70 kPa, a rupture strength longitudinally better than 10 and transversely better than 3 N, a flexural rigidity longitudinally better than 0.5 cN cm2 and transversely better than 0.25 cN cm2, a basis weight of 30-80 g/m2 and a droplet sink-in time of less than 10 minimum. The dust filter bag can be produced by the following steps: mixing fibers including cellulose fibers and fusible fibers into a homogenous fiber mix, processing the fiber mix into a fiber web by wet laying, drying the fiber web, curing the dried fiber web by thermofusion into a backing material ply, processing the backing material ply with a filter material ply into a raw bag, and finishing the raw bag into a dust filter bag.

Abstract: The invention relates to a dust filter bag having a highly porous backing material ply and to a method for producing the dust filter bag

Abstract: A dust filter bag constituted of a plurality of layers including at least one carrier material and at least one non-woven tissue layer wherein the at least one non-woven tissue layer has a nano non-woven tissue with an average fiber diameter of 10 to 1000 mm, a basis weight of 0.05 to 2 g/m2 and an air permeability of 1500 to 20,000 l/m2×s, and the at least one carrier material layer and an air permeability of more than 70 l/m2×s, and a breaking resistance in the longitudinal direction of more than 20 N/15 mm strip width, and in the transverse direction of more than 10 N/15 mm strip width. The dust filter bag is suitable for use in vacuum cleaners for the efficient reduction of the finest dust, without the suction power of the vacuum cleaner being notably reduced.