Organic (e.g., Vegetable) Patents (Class 55/528)
  • Patent number: 9211491
    Abstract: Nonwoven filter media with an alpha value greater than about 13 generally includes a plurality of large diameter fibers, a plurality of ultrafine diameter fibers, and a binder. The large diameter fibers have an average diameter of greater than about 6 microns and make up more than about 60% by weight of the fiber web. The ultrafine diameter fibers have an average diameter of less than about 1 micron. Also disclosed is a method of manufacturing a filter media.
    Type: Grant
    Filed: November 6, 2012
    Date of Patent: December 15, 2015
    Assignee: LYDALL, INC.
    Inventors: Herve Le Port, Guillaume Moreau
  • Publication number: 20150135668
    Abstract: The invention relates to a filter medium consisting of a synthetic polymer, comprising a first layer of a non-woven produced by means of a melt-spinning method. An electrostatic charge can be applied to said first layer of a non-woven and the polymer has a melt-flow-Index between 20-200, preferably between 40-100 and even more preferably from 60, the non-woven layer has, in particular, a soft texture.
    Type: Application
    Filed: May 16, 2013
    Publication date: May 21, 2015
    Inventor: Andreas Seeberger
  • Publication number: 20150129486
    Abstract: A multi-layer, fluid transmissive structure is provided that comprises first and second fiber layers each comprising a plurality of polymeric fibers bonded to each other at spaced apart contact points. The polymeric fibers of these fiber layers have diameters greater than one micron and collectively define interconnected interstitial spaces providing tortuous fluid flow paths through the first and second fiber layers. The structure also comprises a plurality of nanofibers disposed intermediate at least a portion of the first fiber layer and at least a portion of the second fiber layer.
    Type: Application
    Filed: December 16, 2014
    Publication date: May 14, 2015
    Inventors: Bennett C. Ward, Geoffrey M. Stoltz
  • Publication number: 20150125504
    Abstract: Melt blown bicomponent fibers comprising a first thermoplastic polymeric material and a second thermoplastic polymeric material comprising homo- or co-polymer(s) of poly(m-xylene adipamide) or polyphenylene sulfide. The first thermoplastic polymeric material may be one or more homo- or co-polymer(s) of nylon 6 (polycaprolactam), nylon 6,6 (poly(hexamethylene adipamide)), polypropylene, and/or polybutylene terephthalate. A plurality of bicomponent fibers may thermally bonded to one another at spaced apart points of contact to define a porous structure that substantially resists crushing. The nonwoven fabric webs and rovings and self-supporting, three-dimensional porous elements may be formed from the plurality of bicomponent fibers.
    Type: Application
    Filed: November 7, 2014
    Publication date: May 7, 2015
    Inventors: Bennett C. Ward, Brenton D. Dillie
  • Publication number: 20150114230
    Abstract: This invention is directed to a filter media for manufacturing pleated filters comprising a non-woven, needle punch felt including a blend of a first polyester fiber and a bi-component fiber wherein said bi-component fiber has a sheath and a core wherein said sheath has a melting point above 110° C. and said nonwoven felt has an efficiency of greater than 89% for particles size of 3 to 10 ?m as determined by testing method ASHRAE 52.2. The invention can include a top portion and a bottom portion manufactured from a web made from a carding process that is cross lapped, cut and overlapped so that said top portion and said bottom portion are entangled by a needle punching process to create a homogeneous arrangement prior to applying heat and pressure to stiffen the media for pleating.
    Type: Application
    Filed: October 29, 2013
    Publication date: April 30, 2015
    Applicant: Southern Felt Company, Inc.
    Inventors: Eric Winters, John Lewis, Brian Fields
  • Publication number: 20150107208
    Abstract: Filter media suitable for various applications and related components, systems, and methods associated therewith are described. The filter media may include a fiber web having a mixture comprising non-fibrillated synthetic fibers and fibrillated fibers, such as lyocell. The fiber web may also include multi-component fibers (e.g., bi-component fibers). In some embodiments, glass fibers are not incorporated into the fiber web.
    Type: Application
    Filed: September 26, 2014
    Publication date: April 23, 2015
    Applicant: Hollingsworth & Vose Company
    Inventors: Juergen Battenfeld, Eszter Nofz, Nicolas Clement
  • Patent number: 9011567
    Abstract: The purpose of the present invention is to obtain a spunbonded nonwoven fabric, which comprises a single-component polyester-based fibers, having a high basis weight and a high rigidity by embossing, which is difficult to attain in the conventional art. Further, the present invention provides a filter base material having excellent pleatability, pleat retention property and durability, and a filter using thereof. The present spunbonded nonwoven fabric is obtained by subjecting a deposited fiber assembly to a thermocompression bonding by embossing with a pair of an embossing roll and a flat metal roll, and has a basis weight of 150 to 400 g/m2, a longitudinal bending repulsion of 20 to 60 mN and a longitudinal tensile strength of 400 N/5 cm or more.
    Type: Grant
    Filed: December 10, 2010
    Date of Patent: April 21, 2015
    Assignee: Toyobo Co., Ltd.
    Inventor: Hiroyuki Sakamoto
  • Patent number: 8979961
    Abstract: The Invention relates to a vacuum cleaner filter bag comprising a bag wall, wherein the bag wall comprises precisely one nonwoven layer in the form of a melt-spur microfibrous nonwoven layer.
    Type: Grant
    Filed: September 21, 2010
    Date of Patent: March 17, 2015
    Assignee: Eurofilters Holding N.V.
    Inventors: Jan Schultink, Ralf Sauer
  • Patent number: 8951338
    Abstract: Present invention provides an air filter material using a laminated electret nonwoven fabric subjected to electret processing in which one layer or a plurality of layers of nonwoven fabrics (referred to as nonwoven fabric B) including fibers having a mean fiber diameter in the range of 10 micrometers to 100 micrometers and being larger than a mean fiber diameter of fibers constituting nonwoven fabric A are laminated on at least one side of a nonwoven fabric (referred to as nonwoven fabric A) obtained by mixing two kinds of fibers having a mean fiber diameter in the range of 0.1 micrometer to 15 micrometers and having a different melting point (fibers having a lower melting point are defined as fibers D and fibers having a higher melting point are defined as fibers E), and a laminated electret filter material having a low pressure loss and a high collection efficiency. The filter material is suitably used for a medical mask, an industrial mask, a general purpose mask or the like.
    Type: Grant
    Filed: June 21, 2010
    Date of Patent: February 10, 2015
    Assignees: JNC Corporation, JNC Fibers Corporation
    Inventors: Yasushi Matsuda, Junji Iwata, Mitsuru Kojima
  • Patent number: 8950587
    Abstract: Filter media, including those suitable for hydraulic applications, and related components, systems, and methods associated therewith are provided. The filter media described herein may include two or more layers, at least one of the layers having a relatively high percentage of microglass fibers. Additionally, the filter media may be designed such that the ratio of average fiber diameters between two layers is relatively small, which can lead to a relatively low resistance ratio between the layers. In some embodiments, at least one layer of the filter media comprises synthetic polymer fibers. Certain filter media described herein may have desirable properties including high dirt holding capacity and a low resistance to fluid flow. The media may be incorporated into a variety of filter element products including hydraulic filters.
    Type: Grant
    Filed: October 6, 2010
    Date of Patent: February 10, 2015
    Assignee: Hollingsworth & Vose Company
    Inventors: Cameron Thomson, Milind Godsay, Randall Keisler
  • Patent number: 8951420
    Abstract: Filter media, including those suitable for hydraulic applications, and related components, systems, and methods associated therewith are provided. The filter media described herein may include two or more layers, at least one of the layers having a relatively high percentage of microglass fibers. Additionally, the filter media may be designed such that the ratio of average fiber diameters between two layers is relatively small, which can lead to a relatively low resistance ratio between the layers. The filter media has desirable properties including high dirt holding capacity with low basis weight and a low resistance to fluid flow. The media may be incorporated into a variety of filter element products including hydraulic filters.
    Type: Grant
    Filed: April 3, 2009
    Date of Patent: February 10, 2015
    Assignee: Hollingsworth & Vose Company
    Inventors: Milind Godsay, Randall Keisler
  • Patent number: 8940073
    Abstract: The invention relates to a filter material for cleaning air and gases, comprising a fiber layer (2) made of cellulose fibers bonded to each other in segments by pressing, thus compacting the cellulose fibers in the pressed areas (4).
    Type: Grant
    Filed: March 29, 2010
    Date of Patent: January 27, 2015
    Assignee: McAirlaid's Vliesstoffe GmbH
    Inventor: Andreas Schmidt
  • Publication number: 20150013296
    Abstract: The present invention provides: a polyphenylene sulfide fiber that has excellent tensile strength; and a polyphenylene sulfide fiber that decreases in toughness to a small extent even when subjected to a long-term heat treatment and has excellent tensile strength. The polyphenylene sulfide fiber according to the present invention is characterized by comprising a polyphenylene sulfide resin having a weight average molecular weight of 50000 to 80000 inclusive, having a rigid amorphous content of 50% or more, and having a crystal size of 5 nm or more in the direction of a (111) crystal plane.
    Type: Application
    Filed: February 19, 2013
    Publication date: January 15, 2015
    Inventors: Takeshi Sugimoto, Keiji Kaiho, Koichiro Maeda
  • Publication number: 20140366733
    Abstract: A composite filter media is provided. The composite filter media includes a porous membrane material and a nonwoven felt material laminated to the porous membrane material. The nonwoven felt material includes an amount of amorphous fibers and an amount of crystalline fibers, and the amorphous fibers and the crystalline fibers are each fabricated from the same material.
    Type: Application
    Filed: June 18, 2013
    Publication date: December 18, 2014
    Applicant: BHA Altair, LLC
    Inventors: Cynthia Marie Polizzi, Vishal Bansal
  • Publication number: 20140346107
    Abstract: Polymer compositions that may be used to form fibers for a fiber web are generally described. In some embodiments, certain properties of the polymer compositions (e.g., molecular weight distribution, melt flow index, melt elasticity, and/or melt toughness) may allow the formation of fiber webs having fine fibers and a relatively low amount of process defects. In some instances, these properties of the polymer composition may be achieved by combining two or more polymer components. Fiber webs formed using the polymer composition may have increased performance and/or better structural characteristics compared to fibers webs formed using a single polymer component.
    Type: Application
    Filed: May 24, 2013
    Publication date: November 27, 2014
    Applicant: Hollingsworth & Vose Company
    Inventors: Nagendra Anantharamaiah, William S. Freeman, Bruce Smith
  • Publication number: 20140305090
    Abstract: Provided are a mixed-fiber nonwoven fabric suitable for air filters and a filter medium using the mixed-fiber nonwoven fabric. The nonwoven fabric includes at least two types of fibers having different melting points, which fibers are low melting point fibers made of a polyolefin resin component A, and high melting point fibers made of a high melting point resin component B having a higher melting point than that of the polyolefin resin component A. The number average fiber diameter of the high melting point fibers is larger than that of the low melting point fibers. At least one high melting point fiber having a fiber diameter of 20 ?m to 100 ?m is present per 1.00 mm of the length of the cross section of the nonwoven fabric. The number average fiber diameter of all fibers constituting the nonwoven fabric falls within the range of 0.3 ?m to 10 ?m.
    Type: Application
    Filed: December 14, 2012
    Publication date: October 16, 2014
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Akito Kuroda, Yuji Iyama, Yoshikazu Yakake
  • Patent number: 8852306
    Abstract: The invention relates to a vacuum cleaner filter bag having a filter medium comprising a first layer consisting of a netting, a perforated sheet or a perforated non-woven with an air permeability of at least 10,000 l/(m2 s), and a first fiber layer consisting of man-made fibers and/or vegetable fibers and connected to one side of the first layer.
    Type: Grant
    Filed: July 3, 2008
    Date of Patent: October 7, 2014
    Assignee: Eurofilters Holdings N.V.
    Inventors: Jan Schultink, Ralf Sauer
  • Publication number: 20140250848
    Abstract: A nonwoven filter media comprising: polyphenylene sulfide fibers, an inorganic fibers wherein said filter media exhibits physical properties taken from the group consisting of: (a) a clean gas concentration of less than 0.1 mg/m3, (b) an average cycle time of greater than 125 seconds when the media at 16.0 ounces per square yard is tested per ASTM-D6830-02, (c) residual pressure drop of less than 350 Pa as measured by ASTM-D6830-02; (d) weight of between 5.0 and 20.0 ounces per yard2 and a thickness between 0.020 and 0.100 inches, (e) air permeability of between 10 and 60 cubic feet per minute, (f) Mullen Burst strength of 225 lbs/inch2, (g) less than 50% strength loss according to a tensile test after being submerged in sulfuric acid according to test ASTM-D461-93, (h) total mass removal efficiency of 99.99% and (i) resists burn-through by a stainless steel ball bearings heated to 800° C.
    Type: Application
    Filed: March 11, 2013
    Publication date: September 11, 2014
    Applicant: Southern Felt Company, Inc.
    Inventors: Eric W. Winters, Michael Konesky, William H. Moore, Michael A. Sudduth
  • Publication number: 20140230390
    Abstract: A fiber can be made having a structure with an axial core and a coating layer. The fiber can have a polymer core and one or two layers surrounding the core. The fine fiber can be made from a polymer material and a resinous aldehyde composition such that the general structure of the fiber has a polymer core surrounded by at least a layer of the resinous aldehyde composition.
    Type: Application
    Filed: September 21, 2012
    Publication date: August 21, 2014
    Inventors: Suresh L. Shenoy, Thomas M. Weik
  • Patent number: 8790449
    Abstract: Electret webs are presented which include a blend of a thermoplastic resin and a charge-enhancing additive. The charge-enhancing additives include a heterocyclic imide material which is free of fluorinated groups. The webs prepared from the blends may be in the form of films or non-woven fibrous webs. Non-woven microfiber webs are useful as filtration media.
    Type: Grant
    Filed: March 23, 2010
    Date of Patent: July 29, 2014
    Assignee: 3M Innovative Properties Company
    Inventors: Fuming B. Li, John M. Sebastian, Marvin E. Jones, Daniel A. Japuntich
  • Patent number: 8790432
    Abstract: A seam-sealed filter in which the seam is sealed with a seam tape comprised of an expanded fluoropolymer, such as ePTFE and copolymers thereof, having a crosswise matrix modulus of greater than 1,950 psi and an enthalpy ratio of less than 0.6 is disclosed. Such seam-sealed filters are capable of undergoing greater than 50,000 pulse-jet or reverse air cleaning cycles without substantial cracking or peeling of the sealed seam. Accordingly, the seam-sealed filters in the form of bags are particularly suitable for use in reducing particulate emissions in cement baghouses and the like.
    Type: Grant
    Filed: April 27, 2012
    Date of Patent: July 29, 2014
    Assignee: W. L. Gore & Associates, Inc.
    Inventors: Rebecca Lynn Roehmer, Steve Emmett Minor, Scott Zero
  • Patent number: 8790492
    Abstract: The fiber webs described herein may be incorporated into filter media and filter elements. The fiber webs may exhibit a high dust holding capacity. The fiber webs may also exhibit a low thickness. The fiber webs may be sufficiently flexible and/or deformable so that they may be processed to include a series of waves (also known as flutes) that extend along the cross-machine direction.
    Type: Grant
    Filed: August 16, 2013
    Date of Patent: July 29, 2014
    Assignee: Hollingsworth & Vose Company
    Inventors: James M. Witsch, Douglas M. Guimond
  • Patent number: 8784542
    Abstract: The invention relates to a nanofiber membrane layer having a basis weight of 0.01-50 g/m2 and a porosity of 60-95%, comprising a nanoweb made of polymeric nanofibers with a number average diameter in the range of 50-600 nm, consisting of a polymer composition comprising a semicrystalline polyamide having a C/N ratio of at most 5.5. The invention also relates to water and air filtration devices comprising such a nanofiber membrane layer.
    Type: Grant
    Filed: July 15, 2010
    Date of Patent: July 22, 2014
    Assignee: DSM IP Assets B.V.
    Inventors: Konraad Albert Louise Hector Dullaert, Marko Dorschu, Arnaud David Henri Chiche
  • Patent number: 8784525
    Abstract: The invention relates to a vacuum cleaner filter bag having a composite material comprising a first layer consisting of a netting or a perforated sheet with an air permeability of at least 10,000 l/(m2 s), and a first fiber layer consisting of man-made fibers and/or vegetable fibers and connected to one side of the first layer.
    Type: Grant
    Filed: July 3, 2008
    Date of Patent: July 22, 2014
    Assignee: Eurofilters Holding N.V.
    Inventors: Jan Schultink, Ralf Sauer
  • Publication number: 20140196421
    Abstract: A urea filter material may have a base layer, a cover layer and a filter layer arranged between the base layer and the cover layer, wherein all of the layers are formed from polypropylene non-woven fabric.
    Type: Application
    Filed: February 2, 2012
    Publication date: July 17, 2014
    Applicants: CARL FREUDENBERG KG, MAHLE INTERNATIONAL GMBH
    Inventors: Stefan Jauss, Sven Siegle, Anette Arnold, Thomas Kuehlwein, Holger Leubner
  • Publication number: 20140197095
    Abstract: The invention relates to a multi-layer cleanable filter material for gas and liquid filtration, said filter material comprising a filter layer and a substrate layer that follows the filter layer in the flow direction, wherein the filter layer is substantially dendrite-free and consists of a melt-blown fleece made of elastic polymer fibres that has a breaking elongation of at least 100%.
    Type: Application
    Filed: February 9, 2012
    Publication date: July 17, 2014
    Applicant: NEENAH GESSNER GmbH
    Inventors: Andreas Demmel, Ingrid Meyr, Bernd Klausnitzer
  • Patent number: 8778046
    Abstract: The fiber webs described herein may be incorporated into filter media and filter elements. The fiber webs may exhibit a high dust holding capacity. The fiber webs may also exhibit a low thickness. The fiber webs may be sufficiently flexible and/or deformable so that they may be processed to include a series of waves (also known as flutes) that extend along the cross-machine direction.
    Type: Grant
    Filed: August 16, 2013
    Date of Patent: July 15, 2014
    Assignee: Hollingsworth & Vose Company
    Inventors: James M. Witsch, Douglas M. Guimond
  • Patent number: 8778047
    Abstract: The fiber webs described herein may be incorporated into filter media and filter elements. The fiber webs may exhibit a high dust holding capacity. The fiber webs may also exhibit a low thickness. The fiber webs may be sufficiently flexible and/or deformable so that they may be processed to include a series of waves (also known as flutes) that extend along the cross-machine direction.
    Type: Grant
    Filed: August 16, 2013
    Date of Patent: July 15, 2014
    Assignee: Hollingsworth & Vose Company
    Inventors: James M. Witsch, Douglas M. Guimond
  • Patent number: 8728212
    Abstract: A non-woven textile based filter media is produced from polyester fiber generated using recycled polyethylene terephthalate (PET) beverage bottles, and that non-woven textile based filter media is used to make an air filter. By controlling the diameters and lengths of the PET derived polyester fibers, a non-woven textile based filter media that exhibits a natural Minimum Efficiency Reporting Value (MERV) of about 8 (without requiring electrostatic treatment) and a pressure drop of 2.9 PSI or less can be achieved. A related exemplary embodiment is an air filter fabricated entirely from recycled materials, including a recycled cardboard frame, the non-woven textile based filter media made from recycled PET derived polyester fibers, and a support structure made of recycled plastic or metal wire.
    Type: Grant
    Filed: February 12, 2013
    Date of Patent: May 20, 2014
    Inventors: Jerry M. Brownstein, Kathy Brownstein
  • Publication number: 20140130470
    Abstract: Provided is a porous polytetrafluoroethylene (PTFE) membrane having a PF value of 36 or more and a mass per unit area of 0.90 g/m2 or less. The PF value is determined by the following equation: PF value={?log(PT (%)/100)/(PL(Pa)/9.8)}×100. PT (permeability) is determined by PT (%)=100?CE (%), CE (collection efficiency) is determined by a value measured using dioctyl phthalate particles with a particle diameter of 0.10 ?m to 0.20 ?m under a condition of a permeate flow rate of 5.3 cm/sec, and PL (pressure loss) is determined by a value measured under a condition of a permeate flow rate of 5.3 cm/sec. This porous PTFE membrane is suitable for air filter media.
    Type: Application
    Filed: July 4, 2012
    Publication date: May 15, 2014
    Applicant: NITTO DENKO CORPORATION
    Inventors: Masaaki Mori, Yuri Horie, Shunichi Shimatani
  • Patent number: 8721756
    Abstract: The filter of the invention is a cartridge filter comprising a structure that can maintain a filter medium in an air stream to filter particulates to protect a gas turbine power system. The filter combines a mechanically adequate filter structure and an effective filter medium for to obtain a useful system.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: May 13, 2014
    Assignee: Donaldson Company, Inc.
    Inventors: Michael W. Handley, Mark Brandenhoff, Kirit Patel, Timothy D. Sporre
  • Publication number: 20140123613
    Abstract: Nonwoven filter media with an alpha value greater than about 13 generally includes a plurality of large diameter fibers, a plurality of ultrafine diameter fibers, and a binder. The large diameter fibers have an average diameter of greater than about 6 microns and make up more than about 60% by weight of the fiber web. The ultrafine diameter fibers have an average diameter of less than about 1 micron. Also disclosed is a method of manufacturing a filter media.
    Type: Application
    Filed: November 6, 2012
    Publication date: May 8, 2014
    Applicant: LYDALL, INC.
    Inventors: Herve Le Port, Guillaume Moreau
  • Patent number: 8715820
    Abstract: Odor-absorbing sheet-like structure comprising vegetable and/or manmade fibers, in particular a sheet-like structure having an air permeability suitable for filters and vacuum cleaner bags, which sheet-like structure has zinc ricinoleate in an amount in the range of 0.1 to 20% by weight, based on the weight of the sheet-like structure, in finely divided solid form on at least a part of the free fiber surface, and method for its production by treatment of a sheet-like structure with a dispersion of fine zinc ricinoleate particles or by spraying on a mist of a melt or solution of zinc ricinoleate.
    Type: Grant
    Filed: January 28, 2008
    Date of Patent: May 6, 2014
    Assignee: Neenah Gessner GmbH
    Inventors: Bernd Klausnitzer, Albrecht Klimmek, Ernst Raabe
  • Patent number: 8709139
    Abstract: A layer for use in a HEPA filter element solves the problem of disclosing a filter element which satisfies HEPA requirements. Said layer comprises a first support layer (1) for stabilization which contains polypropylene fibers, and a second deposition layer (2) which contains polypropylene fibers, wherein the polypropylene fibers of the deposition layer (2) are at least partially electrostatically charged, and wherein the support layer (1) and the deposition layer (2) are constructed as nonwoven material which is at least partially free of glass fiber. The layer according to the invention can be easily pleated while having excellent filter efficiency.
    Type: Grant
    Filed: December 3, 2007
    Date of Patent: April 29, 2014
    Assignee: Carl Freudenberg KG
    Inventors: Klauss Veeser, Armin Greiner, Harold Von Schischka, Juergen Adolph, Toan-Hieu Giang
  • Patent number: 8709249
    Abstract: A filter has a filter medium (10) during operation clears fluid, particularly in the form of hydraulic fluid. The filter medium (10) is made of a material such that the potential difference to the fluid to be cleaned is low. The parts of the filter medium (10) have different potentials with respect to each other and/or the fluid to be cleaned such that they cancel each other at least partially, specific dissipation is aspired, or a return of electric charge to the associated filter medium (10) is provided, using a charge equalization situation.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: April 29, 2014
    Assignee: Hydac Filtertechnik GmbH
    Inventors: Andreas Schmitz, Edwin Koch, Matthias Schwender, Claudia Brocker
  • Patent number: 8709138
    Abstract: A filter medium including a carrier layer and a microfiber layer applied thereon is characterized in that, with respect to the aim of providing a filter medium which has a relatively low pressure drop, and at the same time a good fraction separation rate and excellent dust storage capacity, the carrier layer has first fibers, which are designed as endless bicomponent fibers and spunbonded fibers, and the microfiber layer has second fibers, which are designed as endless melt-blown fibers.
    Type: Grant
    Filed: October 5, 2009
    Date of Patent: April 29, 2014
    Assignee: Carl Freudenberg KG
    Inventors: Alexandra Lazarevic, Robert Bader, Rosemarie Kurzer, Heinz Reinhardt
  • Patent number: 8709118
    Abstract: Disclosed are improved polymer materials. Also disclosed are fine fiber materials that can be made from the improved polymeric materials in the form of microfiber and nanofiber structures. The microfiber and nanofiber structures can be used in a variety of useful applications including the formation of filter materials.
    Type: Grant
    Filed: January 10, 2013
    Date of Patent: April 29, 2014
    Assignee: Donaldson Company, Inc.
    Inventors: Hoo Y. Chung, John R. B. Hall, Mark A. Gogins, Douglas G. Crofoot, Thomas M. Weik
  • Patent number: 8697213
    Abstract: A photodegradable plastic is described, comprising cellulose esters and also, if appropriate, additives. A particular characterizing feature of this photodegradable plastic is that it comprises a dispersed photocatalytic carbon-modified titanium dioxide. Comparative experiments show that this photodegradable plastic exhibits a surprisingly high increase in photocatalytic degradability when compared with products in which a conventional or other modified titanium dioxide is used. This improvement is apparent in particular in use of the photodegradable plastic according to the invention when it is further processed to give moldings. The photodegradable plastic can, for example, first be further processed to give a filter tow. This can be used to produce filter rods, and these can then be used to produce filter plugs for filter-tip cigarettes.
    Type: Grant
    Filed: August 13, 2009
    Date of Patent: April 15, 2014
    Assignee: SOLVAY ACETOW GmbH
    Inventors: Dirk Hölter, Wolfgang Koppe
  • Patent number: 8684189
    Abstract: Described is the application of layer-by-layer (LbL) electrostatic assembly techniques to electrospun nanofibers in order to fabricate novel, breathable electrospun fiber-based chemical and biological detoxifying protective fabrics and filters. The combination of layer-by-layer electrostatic assembly and electrospinning technique allows one to take advantage of high specific surface area, light weight and breathability of electrospun fiber mats while simultaneously providing the versatility to incorporate different functional polyelectrolytes to achieve multifunctional coatings for both chemical and biological protection together. The functionalized fiber mats can be incorporated into breathable chemical and biological protective fabrics, filters and masks. In addition, LbL electrostatic coating of porous non-woven materials provides the versatility to generate multifunctional polymer-based membrane materials for other applications.
    Type: Grant
    Filed: July 21, 2010
    Date of Patent: April 1, 2014
    Assignee: Massachusetts Institute of Technology
    Inventors: Liang Chen, Lev E. Bromberg, Trevor Alan Hatton, Gregory C. Rutledge
  • Patent number: 8685128
    Abstract: A filter element arrangement is provided which includes a media pack comprising Z-filter media, a preform and an overmold sealing a portion of the interface between the preform and the media pack, and also forming an air cleaner seal for the filter element. The overmold preferably comprises molded, foamed, polyurethane. A variety of media pack shapes can be used.
    Type: Grant
    Filed: August 13, 2012
    Date of Patent: April 1, 2014
    Assignee: Donaldson Company, Inc.
    Inventors: Kevin Schrage, Troy Murphy, Donald Raymond Mork
  • Patent number: 8679216
    Abstract: A process for forming a laminate of a low basis weight nanoweb and a substrate includes forming a nanoweb on the surface of a collection scrim, and subsequently bringing the nanoweb into contact with a substrate coated with adhesive. The laminate is suitable for use as a gas filtration medium.
    Type: Grant
    Filed: June 7, 2007
    Date of Patent: March 25, 2014
    Assignee: E I du Pont de Nemours and Company
    Inventors: Antoine Schelling, Anil Kohli
  • Patent number: 8679218
    Abstract: Filter media are described. The filter media may include multiple layers. In some embodiments, the filter media include a nanofiber layer adhered to another layer. In some embodiments, the layer to which the nanofiber layer is adhered is formed of multiple fiber types (e.g., fibers that give rise to structures having different air permeabilities and/or pressure drops). In some embodiments, the nanofiber layer is adhered to a single-phase or a multi-phase layer. In some embodiments, the nanofiber layer is manufactured from a meltblown process. The filter media may be designed to have advantageous properties including, in some cases, a high dust particle capture efficiency and/or a high dust holding capacity.
    Type: Grant
    Filed: April 27, 2010
    Date of Patent: March 25, 2014
    Assignee: Hollingsworth & Vose Company
    Inventors: John A. Wertz, Douglas M. Guimond
  • Patent number: 8679217
    Abstract: A filter including a filter medium with a pleated structure. The medium includes a nanoweb layer and a scrim, wherein the nanoweb layer contains fibers with a number average diameter less than 1 micron and layer thickness less than 50 microns. The ratio of total medium thickness-to-pleat spacing is less than 0.15 and the nanoweb layer has a basis weight of more than about 0.6 gsm. The nonwoven scrim can be a spunbond web, a dry-laid web, a wet-laid web, a cellulose fiber web, a melt blown web and a glass fiber web.
    Type: Grant
    Filed: September 7, 2007
    Date of Patent: March 25, 2014
    Assignee: E I du Pont de Nemours and Company
    Inventors: Cheng-Hang Chi, Hyun Sung Lim
  • Patent number: 8673040
    Abstract: The filter of the invention is a cartridge filter comprising a structure that can maintain a filter medium in an air stream to filter particulates to protect a gas turbine power system. The filter combines a mechanically adequate filter structure and an effective filter medium for to obtain a useful system.
    Type: Grant
    Filed: June 11, 2009
    Date of Patent: March 18, 2014
    Assignee: Donaldson Company, Inc.
    Inventors: Michael W. Handley, Mark Brandenhoff, Kirit Patel, Timothy D. Sporre
  • Patent number: 8668755
    Abstract: A filter for an electronics cooling unit of a telecommunications base station, the electronics cooling unit adapted to receive fresh air into a housing of the cooling unit through an opening communicating with the external environment. The filter includes a structural support configured to be mounted to said housing, a gasket sealingly engaging the structural support and adapted to engage the housing; and a filter media supported by the structural support, the filter media being free of a membrane type layer and including a fiber entanglement selected to prevent ingress of water sufficient to pass a salt fog test consistent with GR-487-CORE and in accordance with ASTM B 117.
    Type: Grant
    Filed: June 10, 2013
    Date of Patent: March 11, 2014
    Assignee: Clarcor Air Filtration Products, Inc.
    Inventors: LaMonte A. Crabtree, Mike Harriman, Mike Raider
  • Patent number: 8668758
    Abstract: The present disclosure relates generally to a nonwoven filtration media comprising a bonded mix of different, discontinuous, thermoplastic resin fibers and optionally discontinuous cellulosic fibers. In some embodiments a tackifier is added to the nonwoven filtration media to provide a sticky or adhesive surface on the fibers. The nonwoven media has an advantageous combination of stiffness, foldability, efficiency and the ability to retain a fold. The nonwoven media can be thermally bonded during the production process. The advantageous combination of mechanical properties allow the disclosed nonwoven media to accept and retain folds and pleats better than some conventional filtration materials while the mix of different fibers provides desirable filtration properties.
    Type: Grant
    Filed: November 7, 2008
    Date of Patent: March 11, 2014
    Assignee: Polyester Fibers, LLC
    Inventors: Leonard Duello, Thomas Hawkins, Christopher Peart, Nathaniel Nance
  • Publication number: 20140066872
    Abstract: Nonwoven textile fabrics in accordance with the present invention are formed primarily of individualized bast fibers substantially free of pectin. The nonwoven fabric can include staple fibers to a lesser extent than the individualized bast fibers. Individualized bast fibers include fibers derived from the flax and hemp plants. The nonwoven textile fabric is formed into a web while in a dry state and subsequently bonded to produce a nonwoven fabric.
    Type: Application
    Filed: March 15, 2013
    Publication date: March 6, 2014
    Inventors: Samuel Charles Baer, Micheal Shea Lerch, Alan Edward Wright
  • Patent number: 8663358
    Abstract: Filter media are provided having improved conductivity to enhance filtration efficiency and/or dissipate static charge, and methods for making the same. In one exemplary embodiment, the filter media can include a filtration substrate, and at least one conductive coating disposed on at least a portion of the filtration substrate. In use, the conductive coating is coupled to an energy source and it is effective to emit ions when energy is delivered thereto to increase the efficiency of the filtration substrate and/or to dissipate or eliminate static charge generated during filtration.
    Type: Grant
    Filed: May 9, 2011
    Date of Patent: March 4, 2014
    Assignee: Hollingsworth & Vose Company
    Inventors: Wai M. Choi, Karin N. Soper
  • Patent number: 8652230
    Abstract: A filter fabric having improved filtering properties for hot gas filtration containing a nonwoven aramid mat The mat has a basis weight of at least 9.7 ounces per square yard (330 grams per square meter) and is characterized by a pore size distribution in which the number of pores in a given range as measured by ASTM F316-03 test method is plotted against pore size. In a preferred embodiment, the percentage of pores having a size in between 10 and 26 microns is greater than 50% while the percentage of pores having a size of greater than 50 microns is less than 0.5%.
    Type: Grant
    Filed: December 8, 2011
    Date of Patent: February 18, 2014
    Assignee: E I du Pont de Nemours and Company
    Inventors: Kurt Hans Wyss, Cheng-Hang Chi
  • Patent number: 8652229
    Abstract: A filtration device including a filtration medium having a plurality of nanofibers of diameters less than 1 micron formed into a fiber mat in the presence of an abruptly varying electric field. The filtration device includes a support attached to the filtration medium and having openings for fluid flow therethrough. A device for making a filter material. The device includes an electrospinning element configured to electrospin a plurality of fibers from a tip of the electrospinning element, a collector opposed to the electrospinning element configured to collect electrospun fibers on a surface of the collector, and an electric field modulation device configured to abruptly vary an electric field at the collector at least once during electrospinning of the fibers. A method for making a filter material.
    Type: Grant
    Filed: October 8, 2009
    Date of Patent: February 18, 2014
    Assignee: Research Triangle Institute
    Inventors: David S. Ensor, Howard J. Walls, Anthony L. Andrady, Teri A. Walker