FILTERING CLOTH Russian patent published in 2002 - IPC

FIELD: cloth production. SUBSTANCE: filtering cloth is manufactured from warp and weft threads made in the form of twist yarn having uniform linear density and surface density of 350-500 g/sq.m. Cloth is made from mixture of polymers of polyvinyl chloride and polyvinylidene chloride used in the ratio of 90-60:10-40 wt.%. Air-impermeability of filtering cloth is 0.2-0.042 cu. m/sq. m/s. Filtering cloth of such structure has prolonged service life. EFFECT: wider range and improved quality of cloth. 1 tbl