FILTER FABRIC Russian patent published in 2013 - IPC D03D15/00 

FIELD: textiles, paper.

SUBSTANCE: filter fabric for cleaning air from industrial dust is made of polyester warp and weft yarns of equal linear density. The fabric is made with satin weave from the multifilament polyester yarns at the base with the coefficient of charge of 1.15-1.2 and polyester yarn in the weft with the coefficient of charge of 0.8-0.85 of the same direction of twist. At that the fabric has a bilateral structure, and one side of the fabric has a smooth surface formed of long overlaps of warp polyester yarns, and the other side of the fabric has a shaggy surface formed of long overlaps based on the polyester weft twisted yarn. At that the openings between the yarns become rectangular in shape, the opening size between the warp yarns is selected from 0 to 5 mcm, the opening size between the weft yarns is selected from 120 to 100 mcm, air permeability is 70-90 dm³/m² second.

EFFECT: improvement of the fabric quality.