Electrospun polymeric nanofiber filter material and devices
US-2024278172-A1 · Aug 22, 2024 · US
Filter media and elements
US2024424435A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2024424435-A1 |
| Application number | US-202418669516-A |
| Country | US |
| Kind code | A1 |
| Filing date | May 20, 2024 |
| Priority date | Mar 15, 2013 |
| Publication date | Dec 26, 2024 |
| Grant date | — |
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- Title
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Abstract
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Fibrous filter medium that includes a melt-blown filter layer comprising melt-blown fibers and a high-efficiency glass-containing filter layer comprising glass fibers.
First claim
Opening claim text (preview).
1 - 20 . (canceled) 21 . A composite medium comprising a laminate of: a first layer comprising hydrophobic melt-blown fibers; a second layer comprising glass fibers and multi-component binder fibers, the glass fibers having an average diameter of less than 2 μm; and a third layer comprising spunbond fibers. 22 . The composite medium of claim 21 , wherein the hydrophobic melt-blown fibers comprise a polyolefin. 23 . The composite medium of claim 21 , wherein the hydrophobic melt-blown fibers are electrostatically charged. 24 . The composite medium of claim 21 , wherein the hydrophobic melt-blown fibers have an average diameter of greater than 1.5 μm. 25 . The composite medium of claim 21 , wherein the first layer has a compressibility of greater than 40% at a pressure of 17.6 psi (1.24 kg/cm 2 ). 26 . The composite medium of claim 21 , wherein the glass fibers have an average diameter of at least 0.1 μm. 27 . The composite medium of claim 21 , wherein the multi-component binder fibers comprise bicomponent core-sheath fibers. 28 . The composite medium of claim 27 , wherein the bicomponent core-sheath fibers comprise a core comprising a first polyester and a sheath comprising a second polyester, wherein the second polyester has a melting point that is lower than that of the first polyester. 29 . The composite medium of claim 21 , wherein the composite medium exhibits a dust loading capacity of at least 30 grams per square foot (g/ft 2 ) of ASHRAE dust when loaded to 4 inches of water dP in static mode. 30 . The composite medium of claim 21 , wherein the composite medium exhibits an efficiency of at least E10 measured by EN1822: 2009. 31 . A composite medium comprising a laminate of: a melt-blown layer comprising polyolefin fibers; a glass-fiber layer comprising glass fibers and multi-component binder fibers; and a support layer comprising spunbond fibers. 32 . The composite medium of claim 31 , wherein the melt-blown layer is electrostatically charged. 33 . The composite medium of claim 31 , wherein the polyolefin fibers have an average diameter of greater than 1.5 μm. 34 . The composite medium of claim 31 , wherein the melt-blown layer has a compressibility of greater than 40% at a pressure of 17.6 psi (1.24 kg/cm 2 ). 35 . The composite medium of claim 31 , wherein the glass fibers have an average diameter of less than 2 μm. 36 . The composite medium of claim 35 , wherein the glass fibers have an average diameter of at least 0.1 μm. 37 . The composite medium of claim 31 , wherein the multi-component binder fibers comprise bicomponent core-sheath fibers. 38 . The composite medium of claim 37 , wherein the bicomponent core-sheath fibers comprise a core comprising a first polyester and a sheath comprising a second polyester, wherein the second polyester has a melting point that is higher than that of the first polyester. 39 . The composite medium of claim 31 , wherein the composite medium exhibits a dust loading capacity of at least 30 grams per square foot (g/ft 2 ) of ASHRAE dust when loaded to 4 inches of water dP in static mode. 40 . The composite medium of claim 31 , wherein the composite medium exhibits an efficiency of at least E10 measured by EN1822:2009.
Assignees
Inventors
Classifications
using folded, pleated material · CPC title
More than one layer present in the filtering material · CPC title
Rendering the filter material hydrophobic · CPC title
otherwise bonded, e.g. by resins · CPC title
Fibre diameter · CPC title
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Frequently asked questions
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- What does patent US2024424435A1 cover?
- Fibrous filter medium that includes a melt-blown filter layer comprising melt-blown fibers and a high-efficiency glass-containing filter layer comprising glass fibers.
- Who is the assignee on this patent?
- Donaldson Co Inc
- What technology area does this patent fall under?
- Primary CPC classification B01D39/1623. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu Dec 26 2024 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).