Class / Patent application number | Description | Number of patent applications / Date published |
210491000 | All fibrous | 22 |
20090039011 | Fuel-filtering device - A fuel-filtering device includes a filter body having a bag shape and a communication hole, and is formed of a plurality of laminated filter layers bonded at rim portions by welding. The laminated filter layers include an outside filter layer formed of a woven mesh, an inside filter layer formed of a non-woven fabric, and at least one intermediate filter layer disposed between the outside filter layer and the inside filter layer and formed of a non-woven fabric. The inside filter layer has an average aperture diameter larger than that of the intermediate filter layers. The filter body is formed of at least one of a polyethylene fiber and a polypropylene fiber. The inside filter layer protects the intermediate filter layer and enhances a weld strength at the rim portions. | 02-12-2009 |
20100072126 | FILTER MATERIAL AND METHOD FOR PRODUCING THE SAME - A filter material comprising a nonwoven fabric which comprises an ultra-fine continuous fiber having a mean fiber diameter of 0.05 to 1.8 μm is prepared by dissolving or eluting a water-soluble thermoplastic resin from a nonwoven fabric or nonwoven web which comprises a conjugate continuous fiber comprising the water-soluble thermoplastic resin and a water-insoluble thermoplastic resin with a hydrophilic solvent and allowing to remain part of the water-soluble thermoplastic resin in the nonwoven fabric or the nonwoven web. In the filter material, the ultra-fine continuous fiber forms a bundle having a mean width of 3 to 100 μm and the nonwoven fabric has an occupancy area ratio of the bundle of the ultra-fine continuous fiber of 1 to 20% in the surface of the nonwoven fabric. The nonwoven fabric also satisfies the following formula: | 03-25-2010 |
20100187171 | Fibrous Media - A multi-faceted family of non-woven webs that can take the form of a filter media, an adaptable forming process and a machine capable of making the range of media are disclosed. The filter medium can have a first surface and a second surface defining a thickness. The medium can comprise a region having a gradient. Such a gradient is formed by having a medium wherein the concentration of a fiber, a property or other component varies from one surface to the next surface. The gradient region of the media can comprise the entire thickness of the medium or can comprise a region that comprises a portion of the media thickness. The media are characterized by the presence of a continuous change of the fiber concentration or property within the region. A non-woven web can also be made comprising a planar fiber structure having a gradient. Such a web can comprise fibers having diameters that can range from 1 to 40 microns and a second fiber having a diameter that can range from 0.5 microns to about 5 microns. The gradient can change in the cross machine (x-dimension) or across the thickness (z-dimension) increasing or decreasing in either direction. The media of the invention can be used in a variety of applications for the purpose of removing particulates from a variety of gas use on liquid media. Further, the filtered medium of the invention used in a variety of filter element types including flat media, pleated media, flat panel filters, cylindrical spin-on filters, z media pleated filters and other embodiments wherein the gradient provides useful properties. Methods or processes or an apparatuses for forming a nonwoven medium comprising controllable characteristic within the medium are disclosed. The term medium (plural media) refers to a web made of fiber having variable or controlled structure and physical properties. | 07-29-2010 |
20100206803 | Multi-Layer, Fluid Transmissive Fiber Structures Containing Nanofibers and a Method of Manufacturing Such Structures - 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. | 08-19-2010 |
20100294713 | Separation Membrane Comprising Polyethersulfone, Process for Producing Thereof, and Dope Solution for Membrane Production - [Problem] A dope solution for membrane production comprising polyethersulfone having high strength, high water permeability, a high rejecting ability and excellent contamination resistance, a separation membrane, and a process for producing the separation membrane are provided. | 11-25-2010 |
20110147299 | COALESCENCE MEDIA FOR SEPARATION OF WATER-HYDROCARBON EMULSIONS - A coalescence media for separation of water-hydrocarbon emulsions comprises an emulsion-contacting sheet formed of: (a) at least one component of the group consisting of natural fibers, cellulose fibers, natural-based fibers, and cellulose-based fibers, at least one component of the group consisting of high-surface-area fibrillated fibers, surface-area-enhancing synthetic material, glass microfibers, and nanoceramic functionalized fibers; and (c) at least one component of the group consisting of a dry strength additive, and a wet strength additive, wherein the fibrous components of the media constitute at least about 70% of the media. In preferred embodiments, the coalescence media comprises kraft fibers, fibrillated lyocell fibers, glass microfibers or nanoceramic functionalized fibers, a wet strength additive, and a dry strength additive. Preferably, the coalescence media is formed as a single, self- supporting layer from a wet-laid process using a homogenously distributed, wet-laid furnish. It may also be formed as a multi-layer structure. | 06-23-2011 |
20110210060 | EXPANDED COMPOSITE FILTER MEDIA INCLUDING NANOFIBER MATRIX AND METHOD - A composite filter media includes an expanded substrate media carrying fine fibers, wherein the fine fibers are extended with the expanding substrate media, thereby improving dust holding capacity and slowing down pressure drop increase. | 09-01-2011 |
20110210061 | COMPRESSED NANOFIBER COMPOSITE MEDIA - A coalescing media includes a compressed composite filter media comprising substrate layers and hydrophilic fine fiber layers for separating free water emulsified in fuels. | 09-01-2011 |
20110215046 | FILTER MEDIUM AND STRUCTURE - Thermoplastic bicomponent binder fiber can be combined with other media, fibers and other filtration components to form a thermally bonded filtration media. The filtration media can be used in filter units, such as breather caps. Such filter units can be placed in the stream of a mobile fluid and can remove a particulate and/or fluid mist load from the mobile stream. The unique combination of media fiber, bicomponent binder fiber and other filtration additives and components provide a filtration media having unique properties in filtration applications. | 09-08-2011 |
20110226690 | POLYMER BLEND, POLYMER SOLUTION COMPOSITION AND FIBERS SPUN FROM THE POLYMER BLEND AND FILTRATION APPLICATIONS THEREOF - The invention relates to a web or filter structure such as the filtration media comprising a collection of fiber comprising a first polymer and a second polymer in a fine fiber or fine fiber web structure. The combination of two polymers provides improved fiber rheology in that the fiber has excellent temperature and mechanical stability. The combination of polymers imparts the properties of elasticity or tackiness, which is desirable for adhering particles to the fiber web, with high temperature resistance. | 09-22-2011 |
20110259813 | FILTER MEDIA WITH A MULTI-LAYER STRUCTURE - 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. | 10-27-2011 |
20110290713 | SINGLE OR MULTI-LAYER FILTER MATERIAL AND METHOD FOR THE PRODUCTION THEREOF - The invention relates to a single or multi-layer filter material, comprising at least one layer made of cellulose, glass fiber, synthetic fiber, or a mixture thereof, and saturated with a binding agent made of an epoxy resin and a curing agent. The hardening agent comprises a first hardener cross-linking at a lower temperature, and a second hardener cross-linking at a higher temperature, so that the epoxy resin can be hardened stepwise depending on the temperature. | 12-01-2011 |
20120085695 | Carbon nanotube wetlaid depth media - Disclosed is a media (such as a filter media) having one or more carbon nanotube (CNT)-containing layer. Each CNT-containing layer contains high temperature refractory fibers (e.g., staple quartz fibers and/or ceramic refractory fibers) that have melting temperatures greater than about 600° C. and in situ grown CNTs. Substantially all of the in situ grown CNTs have one end thereof associated with the fibers. This results in substantially all of the in situ grown CNTs extending away from substantially all of the fibers. Moreover, substantially all of the in situ grown CNTs are dispersed throughout the fibers. In one embodiment the media also includes one or more supporting layer. Each supporting layer contains high temperature refractory fibers that have melting temperatures greater than about 600° C., optionally bulk refractory fibers, optionally E-glass fibers, and optionally microglass fibers. The media can be tailored as a filter media to remove different size particles and have different dirt loading capacities depending upon the desire of the consumer. | 04-12-2012 |
20130264274 | FILTER AND METHOD OF MANUFACTURE - A filter pad comprising a pad of non-woven fibrous material having a peripheral region in which opposing faces have been compressed together and fused so as to form an outwardly-extending peripheral lip. | 10-10-2013 |
20140014573 | FILTERING MATERIAL FOR FILTER, AND WATER FILTERING APPARATUS PROVIDED WITH FILTERING MATERIAL - The present invention provides a filtering material for filtering water having high collection efficiency and long filtering life, and a water filtering apparatus including the material. The present filtering material includes a laminated sheet in which a nanofiber layer formed from a nanofiber having a single fiber average diameter of 10 to 1000 nm and meeting all the following conditions and a base material including a nonwoven or woven fabric containing a hydrophilic fiber having a single fiber average diameter of not less than 1 μm. Further, the present water filtering apparatus is configured by including the filtering material for filtering water. (1) The nanofiber layer has a basis weight of 0.1 to 10 g/m | 01-16-2014 |
20140083926 | Filter Medium For Manufacturing Filters - The above objective are accomplished by providing a filter medium for use in manufacturing of hydraulic fluid and air filters comprising: an upstream layer comprised of nonwoven fiber having a denier between about 5.0 and 7.0 and a weight of between about 3.0 and 5.0 ounces a scrim and a cap layer comprising a fiber having a denier between about 0.1 and 5.0 denier and a weight between about 2.0 and 4.0 ounces carried by said upstream layer and disposed downstream from said upstream layer. The upstream layer, scrim and cap layer can have a weight of about 4.0 ounces, 2.0 ounces and 3.0 ounces respectively. A downstream layer can be disposed between said upstream layer and said cap layer. | 03-27-2014 |
20140197095 | MULTI-LAYER FILTER MATERIAL AND FILTER ELEMENT PRODUCED THEREFROM - 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 | 07-17-2014 |
20150014240 | FILTER MEDIA FOR GRAVITY FILTRATION APPLICATIONS - A gravity filter media fabricated from multiple spiral wound or pleated layers, where different layers are designed for specific contaminant removal process and the layers are combined into a single pack for ease of use. The layers or fiber sheets are chemically treated for contaminant removal, with different layers having different chemical treatments, or the layers are immobilized with particles of various sizes for use as low contact-time adsorbents, with different layers having different immobilized particles, or the pore structure is varied from one fiber sheet to another—one being a tight pore structure, and the other being a more open pore structure, or any combination thereof. When using immobilized particles, the immobilized particles can be chemically treated for the specific removal of targeted contaminants, and multi-layered for custom designed removal of specific contaminants. | 01-15-2015 |
20150090658 | Fiber having a Nanohair Surface Topography - A fiber that has a unique surface topography in that it contains a plurality of nanohairs extending outwardly from an external surface of an elongate structure of the fiber is provided. To form the nanohairs, a polymer composition is spun that includes organofunctional nanoparticles (e.g., polyhedral organofunctional silsesquioxanes) embedded within a matrix of a base polymer. Despite being initially embedded within the polymer, the present inventors have discovered that, through selective control over the nature and relative concentration of the components of the composition, as well as the method in which the fiber is formed, a substantial portion of the nanoparticles can migrate to the surface of the fiber as it is formed and thus become arranged in the form of nanohairs. | 04-02-2015 |
20150122726 | LARGE FORMAT MELT-BLOWN DEPTH FILTER CARTRIDGE - A tubular depth filter element has three or more concentric zones. Each zone is made of an essentially continuous melt blown filament. The filament of an outer zone preferably has a larger diameter than the filaments of other zones. The outer zone overlaps with at least 85%, and preferably all, of another zone. Optionally, one or more additional filaments may traverse through all of zones. The depth filter element is made by spraying filaments onto a rotating mandrel to form a filament mass in contact with a conical press roller. The filaments are sprayed from three or more nozzles which are spaced apart along the length of the mandrel. One of the filaments is formed in a spray pattern that is angled towards an adjacent spray pattern so as to overlap with at least 50 or 85%, and preferably all, of the adjacent spray pattern. | 05-07-2015 |
20150129486 | MULTI-LAYER, FLUID TRANSMISSIVE FIBER STRUCTURES CONTAINING NANOFIBERS AND A METHOD OF MANUFACTURING SUCH STRUCTURES - 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. | 05-14-2015 |
20150298065 | HIGH FLUX HIGH EFFICIENCY NANOFIBER MEMBRANES AND METHODS OF PRODUCTION THEREOF - A membrane is provided including a coating layer having cellulose nanofibers produced from oxidized cellulose microfibers and an electrospun substrate upon which the coating layer is applied. The nanofibers of the electrospun substrate have a diameter greater than that of the cellulose nanofibers. The membrane also has non-woven support upon which the electrospun substrate is disposed. Microfibers of the non-woven support have a diameter greater than that of the nanofibers of the electrospun substrate. Application of electrospun membrane is in microfiltration area, while the cellulose nanofiber membrane serves in ultrafiltration, nanofiltration, and reverse osmosis after chemical modification. | 10-22-2015 |