Patent ID: 11896922
Assignee: EUROFILTERS HOLDING N.V.
Field: Chemical engineering (Chemistry)
Classification: CPC B  A | IPC A  B

Claim 0:
1. A vacuum cleaner filter bag, comprises an interior-enclosing wall of an air-permeable material and an inlet opening introduced into the interior-enclosing wall,
wherein the air-permeable material comprises at least one layer of a nonwoven fabric comprising powdery or fibrous recycled material from textile manufacturing,
wherein the at least one layer of the nonwoven fabric has a density from 0.005 g/cm3 to 0.03 g/cm3,
wherein the powdery or fibrous recycled material comprises cotton dust,
wherein the at least one layer of the nonwoven fabric comprises at least one powdery or fibrous recycled material comprising up to 95 wt. % of the powdery or fibrous recycled material or seed fibers and at least 5 wt. % of bonding fibers,
wherein the at least one layer of the nonwoven fabric is a dry-laid nonwoven fabric,
wherein the powdery or fibrous recycled material in the at least one layer of the nonwoven fabric is bonded via the bonding fibers being thermally activated,
wherein the air-permeable material comprises, at least one fine filter layer, at least one capacity layer, and optionally at least one support layer, wherein the at least one support layer or the at least one fine filter layer comprises nonwoven fabrics which are made of one or more recycled plastics, and wherein the at least one capacity layer comprises nonwoven fabrics comprising the powdery or fibrous recycled material.