METHOD OF MANUFACTURE OF DEEP-SEATED FILTER ELEMENTS FROM SYNTHETIC MICROFIBERS Russian patent published in 2000 - IPC

FIELD: filtration technique. SUBSTANCE: proposed method includes extrusion of polymer material from fiber-forming head, acting on jets of melt by flow of compressed air in way of mandrel, laying fibers in mandrel layer by layer, thus forming filtering layers simultaneously changing pressure of air flow by stepwise manner at constant rotation speed of mandrel. Direction of rotation of mandrel is reversed at least once. EFFECT: reduced power requirements; improved quality of finished articles. 2 cl, 1 dwg, 1 ex