|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||442/352 ; 442/353 ; 442/361 ; 442/364|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 78 인용 특허 : 39|
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 me...
[ 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.