FILTERING FABRIC Russian patent published in 1998 - IPC

FIELD: filtering materials. SUBSTANCE: filtering fabric is made from core and filling polyester monofilaments by one of foundation weaves, such as plain or serge weaves. Through openings between core and filling threads are rectangular. Core thread spacings are 40-45 microns and filling thread spacings are 14-18 microns. Fabric through porosity coefficient is 10-16%. Core and filling thread diameter ratio is $$$. Fabric warp and weft density ratio is within the range of 1-0.9. Ratios of fibrous material filling coefficient of warp and weft are K(fwr) = 0.65-0.85 and K(fwf) = 0.85-0.9, respectively. EFFECT: increased efficiency by reduced rigidity and thickness of fabric, increased air-permeability and filtering capacity. 1 tbl