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.

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.

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.

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.

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.

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%.

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.

Abstract: Provided are spunbond polyester mats using an improved curable composition. Such curable composition comprises the reaction product of an aldehyde or ketone and an amine salt of an inorganic acid. The composition when applied to spunbond polyester continuous filaments is cured to form a water-insoluble polymer binder which exhibits good adhesion and thermodimensional stability.

Abstract: 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.

Abstract: Electret webs are presented which include a blend of a thermoplastic resin and a charge-enhancing additive. The charge-enhancing additives include N-substituted amino carbocyclic aromatic materials. 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.

Abstract: Filter media, as well as related assemblies, systems and methods. Filter media may contain one or more layers formed of a meltblown material.

Abstract: Disclosed are a fiberweb, a preparation method thereof, and a filter including the fiberweb. The fiberweb includes a wholly aromatic liquid crystal polyester resin which includes a repeating unit induced from a hydroxybenzoic acid and a repeating unit induced from a hydroxynaphthoic acid, but does not include a repeating unit induced from an aromatic dicarboxylic acid.

Abstract: Filter media is treated with a composition comprising cationic fluorinated ether silanes to provide durable water- and/or oil-repellency properties.

Abstract: A method, including receiving a turbine filter unit in a plasma treatment system, wherein the turbine filter unit comprises a filter media assembled with a framework, and applying at least one plasma treatment coating to the turbine filter unit via the plasma treatment system.

Abstract: Multi-phase filter media, as well as related articles, components, filter elements, and methods, are disclosed.

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.

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.

Abstract: Electret webs are presented which include a blend of a thermoplastic resin and a charge additive. The charge additives include ester-substituted and amide-substituted trianilino triazine materials. 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.

Abstract: A method of making a multilayer filter and the multilayer filter made by the method. The method includes generally two steps. The first step is to coat a layer of nanofibers on a single side or both sides of a substrate medium to obtain a composite filter medium, and the second step is to fold the composite filter medium in a serpentine fashion to form a multilayer filter. The second step may alternatively be accomplished by stacking up a number of sheets of the composite filter medium to form a multilayer filter having a structure of two layers of nanofibers being sandwiched between two layers of said substrate medium. The resulting multilayer filter produced by either method contains at least one structural unit which has two layers of nanofibers being sandwiched between two layers of the substrate medium.

Abstract: Z-filter media pack arrangements and methods for providing them are described. The preferred arrangements have a cured-in-place jacket around an outside of a coiled z-filter media combination. The preferred cured-in-place jacket is a mold-in-place overmold which includes, integral therein, a housing seal arrangement. Preferably a cured-in-place center core is used, most preferably one that has opposite concave ends with seal arrangements configured to seal a lead end portion of the coiled z-filter media combination.

Abstract: Melt-blown fiber (MBF) comprising a propylene copolymer (PP), wherein the melt-blown fiber (MBF) and/or the propylene copolymer (PP) has/have (a) a melt flow rate MFR2 (230° C.) measured according to ISO 1133 of at least 300 g/10 min, (b) a comonomer content of 1.5 to 6.0 wt.-%, the comonomers are ethylene and/or at least one C4 to C12 ?-olefin, (c) <2,1> regiodefects of more than 0.4 mol.-% determined by 13C-NMR spectroscopy.

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.

Abstract: A composite filter media structure includes, in an exemplary embodiment, a base substrate that includes a nonwoven synthetic fabric formed from a plurality of fibers with a spunbond process. The base substrate has a filtration efficiency of about 35% to less than 50%, measured in accordance with EN 1822 (1998) test procedure A nanofiber layer is deposited on one side of the base substrate. The composite filter media structure has a minimum filtration efficiency of about 70%, measured in accordance with EN 1822 (1998) test procedure.

Abstract: 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.

Abstract: A molded respirator is made from a monocomponent monolayer nonwoven web of continuous charged monocomponent meltspun partially crystalline and partially amorphous oriented fibers of the same polymeric composition that have been bonded to form a coherent and handleable web which further may be softened while retaining orientation and fiber structure. The respirator is a cup-shaped porous monocomponent monolayer matrix whose matrix fibers are bonded to one another at at least some points of fiber intersection. The matrix has a King Stiffness greater than 1 N. The respirator may be formed without requiring stiffening layers, bicomponent fibers, or other reinforcement in the filter media layer.

Abstract: A pleated filter is made from a monocomponent monolayer nonwoven web of continuous monocomponent meltspun partially crystalline and partially amorphous oriented fibers of the same polymeric composition that are bonded to form a coherent and handleable web having a Gurley Stiffness of at least 100 mg and which further may be softened while retaining orientation and fiber structure. Rows of pleats are formed in the nonwoven web, and the web is cut to a desired size and shape to provide a pleated filter element containing a self-supporting porous monocomponent monolayer matrix of fibers bonded to one another at least some points of fiber intersection and having an average initial submicron efficiency of at least 15% at a 1.52 meters/sec face velocity. The filter element is deformation resistant without requiring stiffening layers, bicomponent fibers, adhesive or other reinforcement in the filter media layer.

Abstract: Disclosed are fibrous activated materials that can remove and/or deactivate potentially dangerous airborne agents from a gas or air stream. Disclosed materials are multi-layer materials that include a fibrous nonwoven interceptor layer and an active layer immediately adjacent the interceptor layer. The interceptor layer is a fibrous membrane of very low basis weight and defines a relatively low porosity, and the active layer describes geometries, chemistries, etc. that can entrap and/or decontaminate compounds contained in an airstream passing through the material. Disclosed materials can be utilized in forming protective garments, face masks, and the like.

Abstract: Espun material may function as a filtration medium or be put to other uses. The espun material may comprise espun poly(tetrafluoroethylene) (espun PTFE). One or more layers of the espun material may be included. The properties of the espun material can be tailored. For example, a gradient fabric may include espun PTFE. The gradient fabric may include two or more layers of espun PTFE.

Abstract: The present invention relates to a spunbonded filament nonwoven fabric and a method of preparing the same, and particularly to a multilayered spunbonded filament nonwoven fabric of which the fineness of the filaments decreases from an air inlet part toward an air outlet part, and a method of preparing the same. The spunbonded nonwoven fabric of the present invention can be used as an air filter for power generation equipment for a gas turbine, because it can reduce a pressure loss, promote filter efficiency, and extend the lifetime for use by using fiber layers having different denier.

Abstract: The invention relates to a porous membrane having a particle filtration value of at least 10 under U.S. Military Standard MIL-STD-282 (1956), where the porous membrane is a polyethylene membrane. The membranes according to the invention are particularly useful for filters such as ASHRAE filters, HEPA filters and ULPA filters for example in heating, ventilating, respirators and air conditioning applications.

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.

Abstract: The present invention is a filter that includes a length of filter media and a continuous, substantially nonlinear adhesive strand. The filter media has a front face and a rear face. The filter media has a plurality of pleats defined by a plurality of fold lines, each fold line being intermediate oppositely sloping first and second wall surfaces. The plurality of fold lines comprise a first plurality of pleat tips and a second plurality of pleat valleys. The adhesive strand is provided on the front face of the filter media in discontinuous contact with the filter media. The adhesive strand contacts the filter media at a pleat tip and contacts the filter media at a portion of a first wall surface and contacts the filter media at a portion of a second wall surface.

Abstract: The present invention relates to a separating apparatus for separating particles from a fluid flow. Particularly, but not exclusively, the invention relates to a domestic vacuum cleaner having such a separating apparatus for removing dust particles from a dust laden airstream. The separating apparatus includes a first cyclonic cleaning stage including at least one cyclone, and an electrostatic filter, wherein the electrostatic filter is in fluid communication with the at least one cyclone via an air passage, at least a portion of the air passage being formed longitudinally through the separating apparatus, wherein at least a portion of the first cyclonic cleaning stage, the electrostatic filter and the air passage are arranged concentrically.

Abstract: An arrangement separating a hydrophobic liquid phase from gaseous stream, for crankcase ventilation arrangements as described. The arrangement includes a media stage including media formed from a vacuum forming process and including at least 50%, by weight, bi-component fiber therein. Useable media formulations and arrangements are described.

Abstract: A filter medium has a woven fabric (1) made from mineral yarns that is in turn covered with polymeric staple fibres (2) by needling. Optionally, a diaphragm (3) made from porous polytetrafluoroethylene is applied at least on one side of the filter medium, in particular on its inflow side.

Abstract: The present invention relates to new fibers, new processes of using said fibers, and new sheath dope compositions for multi-layer spinning processes. The fibers comprise a porous core and a sheath surrounding said porous core. The fibers may be useful in, for example, processes for removing low level contaminants like sulfur compounds from a gas stream like natural gas.

Abstract: A pleated filter is made from a monocomponent monolayer nonwoven web containing a bimodal mass fraction/fiber size mixture of intermingled larger size and smaller size continuous monocomponent polymeric fibers of the same polymeric composition. Rows of pleats are formed in the nonwoven web, and the pleated web is cut to a desired size and shape to provide a filter element containing a self-supporting porous monocomponent monolayer matrix of fibers bonded to one another at least some points of fiber intersection and having an average initial submicron efficiency of at least 15% at a 1.52 meters/sec face velocity. The filter element is deformation resistant without requiring stiffening layers, bicomponent fibers or other reinforcing measures in the filter media layer.

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.

Abstract: A filter media comprising a nanofiber layer and a substrate layer; the nanofiber layer comprising a polymer material and having a fiber diameter of about 0.01 to 1.0 micron, a basis weight of about 0.5 to 30 gsm, and a thickness of at least about 2 microns, the nanofiber layer further having a surface stability index of at least about 5 kN/m, the media further being pleated.

Abstract: Multi-phase filter media, as well as related articles, components, filter elements, and methods, are disclosed.

Abstract: 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.

Abstract: A filter medium of a filter element for filtering a fluid has at least one nonwoven filter layer of synthetic individual fibers. The filter layer has an increasing level of compression in a flow direction of a fluid passing through the filter medium. The filter medium has a degree of separation for particles to be filtered that increases in the flow direction of the fluid through the filter medium. The filter medium is used in a filter element for filtering fluids such as fuel or air. In a method for producing the filter medium, the synthetic fibers are deposited on a support surface in such a way that an increasing level of compression is created in a direction toward the support surface by gravity and suction acting on the fibers.

Abstract: A nonwoven felt for hot gas filtration. The fibers have a polyarylene sulfide (PAS) component that contains a zinc compound. In one embodiment, the PAS comprises at least one zinc(II) salt of an organic carboxylic acid. Also a method for filtering hot gases employing a bag made from a PAS component that contains a zinc or a zinc based additive.

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%.

Abstract: A conducting filter adapted for removing airborne particles from the atmosphere and a filter assembly including such a filter. The conducting filter is made from a polymer which has received significantly increased electrical conductivity by a doping process, the doped polymer referred to as a synthetic metal, the synthetic metal having electrical properties such that the filter according to the invention, including such polymer, may be supplied with electrical charge and whereby maintain its efficiency with regards to the electrostatic properties during operation. In the filter assembly according to the invention, the conducting filter may be supplied with electrical charge by connecting it to a voltage source.

Abstract: A composite filter media structure includes, in an exemplary embodiment, a base substrate that includes a nonwoven synthetic fabric formed from a plurality of fibers with a spunbond process. The base substrate has a minimum filtration efficiency of about 50%, measured in accordance with ASHRAE 52.2-1999 test procedure A nanofiber layer is deposited on one side of the base substrate. The composite filter media structure has a minimum filtration efficiency of about 75%, measured in accordance with ASHRAE 52.2-1999 test procedure.

Abstract: This invention relates to a nonwoven fabric for filters, in which a melt blown nonwoven fabric formed of polybutylene terephthalate or polypropylene terephthalate fibers with an average fiber diameter of 1 to 8 ?m and a spunbonded nonwoven fabric formed of polyester-based fibers with an average fiber diameter of 10 to 30 ?cm are laminated for integration.

Abstract: A filtration medium includes a fine filter layer having a plurality of nanofibers and a coarse filter layer having a plurality of microfibers attached to the fine filter layer. The coarse filter layer is positioned proximal to a direction of fluid flow, and the fine filter layer is positioned distal to the direction of fluid flow.

Abstract: A filter element has of a filter medium (10) folded in a zig-zag manner and designed in a tubular shape. End plates (11, 12) are arranged on the filter medium end faces. End plate (12) has a concentric opening as well as a first annular ring (14) and a second annular ring (15), and a sealing groove (16) arranged between the rings. A reinforcement plate (17) is arranged at the end plate and has an annular surface (23) extending in axial direction across folds of the filter element.

Abstract: 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.