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US 10,668,411 B2Granted
Depth filtration media with multiple organic and/or inorganic materials
AssigneeEntegris, Inc.
InventorsHenry Wang, Dean Tsou, Yi Wei Lu, Bob Shie
Life of this patent
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Abstract
A method of making depth filtration media, such as for use in a depth filter, are described. The resulting depth filtration media includes a core tube having two or more different layers. The layers can be fibers, such as polymeric or inorganic fibers, wrapped layers of a filter material, or pleated and folded layers of a filter material.
Claims20
A depth filtration media having a plurality of layers, comprising:
- a) a core tube;
- b) a non-woven layer of a first filter material comprising polymeric fibers melt-blown atop the core tube, wherein a diameter of the polymeric fibers is in a range from about 0.3 micron to about 10 microns;
- and
- c) a layer of a second filter material over the layer of first filter material, the first and second filter materials being different.
1 more element
A multilayer depth filtration media comprising:
- a) a non-woven layer of polymeric melt-blown fibers, the polymeric melt-blown fibers have a diameter that range from about 0.3 micron to about 10 microns, the polymeric melt-blown fibers form a layer atop a liquid permeable core, the layer has a thickness between about 1 millimeter and about 20 millimeters;
- b) a non-woven microporous filter membrane overlying the melt-blown polymeric fibers atop the core, the microporous filter membrane has pores with a size of between about 0.2 microns and about 1.4 microns and the thickness of the filter membrane can be between about 20 microns and about 1000 microns;
- and
- c) a non-woven layer of polymeric fibers melt-blown atop the non-woven microporous filter membrane, the polymeric fibers in this layer atop the microporous filter membrane have a diameter of from about 0.3 micron to about 10 microns, said layer has a thickness between about 1 millimeter and about 20 millimeters.
1 more element
A method of making depth filtration media having a plurality of layers, comprising:
- a) providing a core tube;
- b) melt-blowing a first filter material comprising polymeric fibers atop the core tube, wherein a diameter of the polymeric fibers is in a range from about 0.3 micron to about 10 microns;
- and
- c) layering a second filter material over the first filter material, the first and second filter materials being different;
- thereby forming a depth filtration media.
2 more elements
A depth filter, comprising:
- a) filtration media comprising a core tube, a non-woven layer of first filter material comprising polymeric fibers melt-blown atop the core tube, wherein a diameter of the polymeric fibers is in a range from about 0.3 micron to about 10 microns, and a layer of second filter material over the layer of first filter material, the first and second filter materials being different;
- and
- b) end caps bonded to opposing ends of the filtration media.
Dependencies are inferred from the claim text.