Invention Grant
- Patent Title: Self-cleaning filter
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Application No.: US15754029Application Date: 2016-08-22
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Publication No.: US12023610B2Publication Date: 2024-07-02
- Inventor: Jesse Shim , Kevin Kim , Ryan Kwon , Jayden Bae , Patrick Yeo
- Applicant: Ahlstrom Oyj
- Applicant Address: FI Helsinki
- Assignee: Ahlstrom Oyj
- Current Assignee: Ahlstrom Oyj
- Current Assignee Address: FI Helsinki
- Agency: Sisson & Banyas, Attorneys at Law, LLC
- Agent Jeffrey J. Banyas
- International Application: PCT/EP2016/069820 2016.08.22
- International Announcement: WO2017/032748A 2017.03.02
- Date entered country: 2018-02-21
- Main IPC: B01D35/00
- IPC: B01D35/00 ; B01D39/16 ; B01D39/18 ; B01D39/20 ; B32B5/02 ; B32B5/26 ; C10G31/09 ; D04H1/4326 ; D04H1/728 ; D04H3/009 ; D04H3/03

Abstract:
A self-cleaning filtration media for use in hydrocarbon fluid filtration applications has a first layer on an upstream side and a second layer on downstream side of the self-cleaning filtration media. The first layer is composed of polyethersulfone nanofibers having a diameter of 50-1000 nm (0.05-1 micron) and a basis weight of at least 1 gsm. The second layer is a nonwoven substrate suitable for filtration applications. The self-cleaning filtration media exhibits a dust holding capacity of at least 6 mg/cm2 and a filtration efficiency of greater than 90% for 4 micron particles when the self-cleaning filtration media is tested according to ISO 19438 for fuel filtration and according to ISO 4548-12 for oil filtration. When the second layer includes glass fibers, the self-cleaning filtration media has a dust holding capacity of at least 10 mg/cm2 and a filtration efficiency of greater than 99% for 4 micron particles when the self-cleaning filtration media is tested according to ISO 19438 for fuel filtration and according to ISO 4548-12 for oil filtration. The self-cleaning filtration media also has a fuel-water separation efficiency of at least 99% when a flat sheet is tested according to ISO 16332; and a lifetime of at least 90 minutes when tested with fuel and oil according to ISO 19438 and ISO 4548-12 using Medium Test Dust and a pressure drop of 70 kPa.
Public/Granted literature
- US20180243673A1 SELF-CLEANING FILTER Public/Granted day:2018-08-30
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