Cummins Filtration Ip, Inc.

Fleetguard, Inc.

3m Innovative Properties Company

University of Minnesota

Fleetgaurd, Inc.

William C Haberkamp

Barry Mark Verdegan

Christopher E Holm

Z Gerald Liu

Eric A Janikowski

Robert K Miller

Mark T Wieczorek

Murray R Schukar

Matthew P Henrichsen

Kyle Ellison

Brian W Schwandt

Kan Wang

Thomas M Yonushonis

Kurt M A Badeau

Terry Shults

A Caner Demirdogen

Jonathan D Sheumaker

Huanling Liu

Thomas Edward Wood

Frank Steven Bates

Scott P Heckel

Randolph G Zoran

Jerald J Moy

Byron Andrew Pardue

Christopher Ward Macosko

Elaine M Yorkgitis

Mark A Terres

David M Stehouwer

Zhongshu Tan

Zaifei Wang

Ismail C Bagci

Kevin C South

Roger L Zoch

Gregory W Hoverson

Stephen L Fallon

Tadeusz Jaroszczyk

Bryan Ellis Blackwell

C Raymond Cheng

Kwok-Lam Ng

Matthew L Anderson

Travis E Goodlund

Roger D England

Thomas A Fosdal

Kenneth Pawson

Jacek Bodasiński

Witalis Rumiński

Leon Gradoń

Mark C Allie

Gene A Mullins, Jr

Steven Stokstad

Yves Ruellou

Roger Bernard

Brian K Fillbach

Gary J Frank

Craig A Clayton

Douglas P Marquis

Darryl J Gust

O Michael Bowling

Bryan E Blackwell

Embodiments described herein relate generally to adhesive alloys and their use in filter media, and in particular to adhesive alloys that can be melt blown onto a filter media layer, and which are thermally activated to bond the filter media layer to another filter media layer. An adhesive alloy is provided. A thermally activated adhesive has a first melting temperature. A polymer has a second melting temperature greater than the first melting temperature. A ratio of the thermally activated adhesive in the adhesive alloy is in a range of 5 wt % to 70 wt %.

Adhesive alloys and filter medias including such adhesive alloys

A nonwoven web comprising a layer of polymeric fibers, wherein, based on the total number of polymeric fibers, at least 10% the polymeric fibers in said layer are coarse fibers having a fiber diameter of 4 &#x3bc;m or more, and at least 10% of the polymeric fibers in said layer are fine fibers having a fiber diameter of 2 &#x3bc;m or less. Also described herein is a method for making the nonwoven web, comprising melt-blowing a polymer mixture comprising two immiscible or partially miscible polymers.

Nonwoven web with bimodal fiber distribution

Disclosed is a composite filter media. The composite filter media is formed from multiple layers of media material including a nanofiber media layer, where the layers are laminated, bound, or otherwise composited to each other. The composite filter media can comprise at least one nanofiber layer comprising polymeric media material having a geometric mean fiber diameter of about 100 nm to 1 &#x3bc;m, and fibers configured in a gradient such that ratio of the geometric mean diameter of fibers at the upstream face of the nano fiber layer to the geometric mean diameter of fibers at the downstream face of the nano fiber layer is about 1.1 to 2.8, preferably about 1.2 to 2.4.

Gradient nanofiber filter media

Described herein is a continuous process for modifying the properties of polyester and polyester based fibers, such as a poly(butylene terephthalate) (PBT) fiber, comprising subjecting the PBT fiber to alkaline hydrolysis, and optionally further comprising functionalizing the PBT fiber by solution grafting such as fluorination. The alkaline hydrolysis and optionally subsequent functionalization such as fluorination process can be continuous, following the melt blowing/spinning or spun-bonding process. Also described is a nonwoven PBT fiber mat obtained by the surface modification process. Further described is a filtration device comprising the nonwoven PBT fiber mat.

Tuning surface properties of melt blown polyester fibers by hydrolysis and solution grafting

Disclosed is a composite filter media. The composite filter media is formed from multiple layers of media material including a nanofiber media layer, where the layers are laminated, bound, or otherwise composited to each other. The composite filter media can comprise at least one nanofiber layer comprising polymeric media material having a geometric mean fiber diameter of about 100 nm to 1 &#x3bc;m, and fibers configured in a gradient such that ratio of the geometric mean diameter of fibers at the upstream face of the nanofiber layer to the geometric mean diameter of fibers at the downstream face of the nanofiber layer is about 1.1 to 2.8, preferably about 1.2 to 2.4.

Disclosed is composite media that may be utilized in coalescing elements, coalescing cartridges, coalescing systems, and coalescing methods. The disclosed media typically is a composite or laminate material formed by bonding adjacent layer of media material comprising bicomponent fibers.

Composite filter media utilizing bicomponent fibers

Disclosed is composite media that may be utilized in coalescing elements, coalescing cartridges, coalescing systems, and coalescing methods. The disclosed media typically is a composite or laminate material formed by bonding adjacent layers of media material comprising bicomponent fibers.

Composite filter media is formed from multiple layers of media material including a nanofiber media layer, where the layers are laminated, bound, or otherwise composited to each other. The composite filter media can comprise at least one nanofiber layer comprising polymeric media material having a geometric mean fiber diameter of about 100 nm to 1 &#x3bc;m, and fibers configured in a gradient such that ratio of the geometric mean diameter of fibers at the upstream face of the nanofiber layer to the geometric mean diameter of fibers at the downstream face of the nanofiber layer is about 1.1 to 2.8, preferably about 1.2 to 2.4.

Disclosed are modular filter-in-filter elements, namely an outer filter element and an inner filter element which may be assembled to form a filter cartridge for use in separation methods and systems. The outer filter element typically functions as a coalescing element and the inner element typically functions as a particulate filter element. The disclosed filter cartridges may be structured for separating water from a hydrocarbon-based liquid fuel as the fuel moves through the cartridge from outside to inside.

Modular filter elements for use in a filter-in-filter cartridge

A water separator and particulate filter with a first or outer stage configured to coalesce water from fluid such as fuel, and a second or inner stage configured to separate coalesced water from the fluid and also remove fine solid contaminants from the fluid. The coalescing stage includes a pleated cylinder of polymeric media. The pleated cylinder has pleat valleys and downstream pleat tips, and release sites defined at the downstream pleat tips. The separator stage includes a non-pleated cylinder of polymeric media surrounding and in contact with outer pleat tips of a multi-layer pleated cylinder.

Two stage fuel water separator and particulate filter utilizing pleated nanofiber filter material

Acid-neutralizing filter media includes filter media fibers in combination with a strong base of small particle size and high surface area attached to and immobilized on the filter media fibers, and methodology therefore.

Acid-neutralizing filter media

A filter is provided by pleated filter media having a plurality of pleats defined by wall segments extending axially along an axial direction along an axis and extending transversely along a transverse direction between first and second sets of pleat tips at first and second sets of axially extending bend lines. The pleated filter media spans laterally along a lateral span along a lateral direction, with the wall segments being spaced from each other by lateral gaps. The pleats have a pleat depth along the transverse direction along the wall segments between the first and second sets of pleat tips. The pleat depth varies as the pleated filter media spans laterally along the lateral direction.

Filter with variable pleat depth

Modified exhaust aftertreatment filters for filtering engine exhaust are provided as are methods of design and manufacturing modified exhaust aftertreatment filters. The modified filters are subject to reduced back pressure and reduced thermal gradients experienced during regeneration as compared to unmodified filters. The modified filters include flow-through channels obtained by unplugging channels which normally are plugged in an unmodified filter.

Tuning particulate filter performance through selective plugging and use of multiple particulate filters to reduce emissions and improve thermal robustness

Growing community of inventors

Cookeville, TN, United States of America

William C Haberkamp