초록 ▼

There is provided in accordance with the present invention a lofty filter medium for filtering fluid-borne particles, which comprises a nonwoven fiber web of crimped fibers selected from the group consisting of spunbond fibers and staple fibers, wherein the filter medium has a density between about

There is provided in accordance with the present invention a lofty filter medium for filtering fluid-borne particles, which comprises a nonwoven fiber web of crimped fibers selected from the group consisting of spunbond fibers and staple fibers, wherein the filter medium has a density between about 0.005 g/cm.sup.3 and about 0.1 g/cm.sup.3. The lofty filter medium is highly suitable for fluid-borne particle filtration applications, such as filtration media for transmission fluids, hydraulic fluids, swimming pool water, coolant oil or cutting fluid for metalworking, metal forming and metal rolling, air-borne particle filtration and the like.

대표청구항 ▼

[ What is claimed is:] [1.] A lofty nonwoven filter medium comprising a nonwoven fiber web adapted for filtering fluid-borne particles, said nonwoven medium filter having a depth and comprising an uncompacted, autogenously bonded web of crimped continuous multicomponent spunbond fibers wherein said

[ What is claimed is:] [1.] A lofty nonwoven filter medium comprising a nonwoven fiber web adapted for filtering fluid-borne particles, said nonwoven medium filter having a depth and comprising an uncompacted, autogenously bonded web of crimped continuous multicomponent spunbond fibers wherein said nonwoven filter medium has a density greater than 0.005 g/cm.sup.3 and less than 0.1 g/cm.sup.3 and a density gradient across its depth and further wherein said spunbond fibers have an average diameter of from about 10 .mu.m to about 50 .mu.m.