Nonwoven filter media
AssigneeKimberly-Clark Worldwide, Inc.
InventorsRichard Daniel Pike, John Joseph Lassig, Peter Wyndham Shipp, Jr., Barbara Jean Williams
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Abstract
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/cm3 and about 0.1 g/cm3. 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.
Claims21
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/cm3 and less than 0.1 g/cm3 and a density gradient across its depth and further wherein said spunbond fibers have an average diameter of from about 10 μm to about 50 μm.
A method of filtering fluid-borne particles, comprising:
- flowing a fluid containing fluid-borne particles through a nonwoven web having a basis weight between about 0.25 ounces per square yard and about 15 ounces per square yard, said nonwoven web having a depth and comprising a fiber web of crimped continuous multicomponent spunbond fibers wherein said nonwoven web has a density between about 0.005 g/cm3 and about 0.1 g/cm3, has a fiber density gradient across its depth and said spunbond fibers have an average diameter less than about 50 μm and wherein fluid-borne particles are entrapped within said nonwoven web.
Dependencies are inferred from the claim text.