Ahlstrom-munksjo Oyj

Ahlstrom Oyj

Kevin Kim

Jesse Shim

Ryan Kwon

Jamie Byeon

David Alan Topolenski

Jinny Kim

Kevin Ray Townsend

Patrick Yeo

Jayden Bae

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/cmand 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/cmand 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.

Self-cleaning filter

A fibrous media suitable for an oil filter comprising a fibrous web formed from synthetic fibers; optionally at least one additive, and a thermoset binder present at a concentration of at least 15 wt.-% by weight of the fibrous web and/or at least one binder fiber, wherein the synthetic fibers comprise up to 30 wt.-%, preferably up to 20 wt.-%, glass fibers, based on the total weight of the fibers. The fibers are bonded with the thermoset binder and/or the at least one binder fiber to form a web; and the fibrous media is capable of forming a self-supporting, pleated oil filter media which is capable of retaining pleats upon contact with oil having a temperature in the range encountered in a combustion engine.

Self supporting pleatable web and an oil filter including the same

The present invention relates to a filter medium having improved heat resistance and filtration efficiency.

Filter medium having excellent heat resistance

Growing community of inventors

Daegu, South Korea

Kevin Kim