Class / Patent application number | Description | Number of patent applications / Date published |
055527000 | Fibrous or strand form | 33 |
20090049816 | Filter felts and bag filters comprising blends of fibers derived from diamino diphenyl sulfone and heat resistant fibers - This invention relates to a filter felt and bag filters comprising an intimate staple fiber blend of 20 to 75 parts by weight polymeric staple fiber containing a polymer or copolymer derived from a monomer selected from the group consisting of 4,4′diaminodiphenyl sulfone, 3,3′diaminodiphenyl sulfone, and mixtures thereof; and 25 to 80 parts by weight of a heat resistant staple fiber selected from the group consisting on meta-aramid fiber, acrylic fiber, polyphenylene sulfide fiber, and para-aramid fiber; based on 100 parts by weight of the polymeric fibers and heat resistant fibers in the felt. | 02-26-2009 |
20090064648 | Pleated nanoweb structures - 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. | 03-12-2009 |
20090320428 | Air filter medium - The objective of the present invention is to provide an air filter medium having a lower pressure drop and higher efficiency as compared to an air filter medium currently in use. This objective is achieved by providing an air filter medium characterized by comprising glass short fibers as its main fibers in which the constituent fibers are dispersed uniformly and, when the constituting fibers at a diluted concentration of 0.04% by mass are allowed to stand for 12 hours, the sedimentation volume is 450 cm | 12-31-2009 |
20100229517 | POLYIMIDE FIBER MASS, SOUND ABSORBING MATERIAL, THERMAL INSULATING MATERIAL, FLAME-RETARDANT MAT, FILTER CLOTH, HEAT RESISTANT CLOTHING, NONWOVEN FABRIC, HEAT INSULATION/SOUND ABSORBING MATERIAL FOR AIRCRAFT, AND HEAT RESISTANT BAG FILTER - A polyimide fiber assembly of the present invention includes polyimide fibers having curved shapes with an average fiber diameter falling within a range of greater than 1 μm to not greater than 100 μm, the polyimide fiber assembly having a bulk density falling within a range of not less than 1 kg/m | 09-16-2010 |
20100319310 | FIBER WEB HAVING A HIGH STIFFNESS - The fiber webs described herein may be incorporated into filter media and filter elements. The webs may exhibit a high permeability and stiffness, at a low thickness. The stiffness can be sufficient for the webs to be pleated to include sharp, well-defined peaks which can be maintained in a stable configuration during use. | 12-23-2010 |
20110283671 | AIR FILTER MEDIUM - The objective of the present invention is to provide an air filter medium having a lower pressure drop and higher efficiency as compared to an air filter medium currently in use. This objective is achieved by providing an air filter medium characterized by comprising glass short fibers as its main fibers in which the constituent fibers are dispersed uniformly and, when the constituting fibers at a diluted concentration of 0.04% by mass are allowed to stand for 12 hours, the sedimentation volume is 450 cm | 11-24-2011 |
20120031063 | LOW-BASIS-WEIGHT FILTER MEDIA FOR AIR FILTERS - An object of the present invention is to improve a problem of the decrease in the internal tearing strength and water repellency in accordance with the decrease in the basis weight of a filter medium for air filters, and to provide a filter medium for air filters that can also address a demand for flame retardancy. The low-basis-weight filter medium for air filters according to the present invention is characterized by glass short fibers (A) and short fibers of hydrophobic chemical synthetic fibers each having a fiber diameter of 5 μm or less (B), as raw material fibers of the filter medium, by a mass ratio (A/B) in the range of from 70/30 to 95/5; a hydrophobic synthetic resin-based binder is added to the filter medium by 3 to 10 parts by mass of with respect to 100 parts by mass of the raw material fibers; and the filter medium has a basis weight of from 25 g/m | 02-09-2012 |
20130298513 | COMPOSITE FILTERING STRUCTURES AND A METHOD FOR OBTAINING COMPOSITE FILTERING STRUCTURES - Composite filtering structures comprising nanofibres spatially distributed between microfibers, wherein on the nanofibers and on the microfibers a palisade of protrusions of nanometric sizes in the form of nano-protrusions is produced, which palisade comprises nano-protrusions oriented with respect to the fibre surface at an angle ranging from about 70° to about 120°. A method of obtaining such composite filtering structures by a method that includes feeding a thermoplastic material from an extruder to at least one fibre formation die, stretching formed fibres coming out from the die, which fibres being still in a molten phase, to smaller sizes by a stream of hot air flowing tangentially to the fibres, collecting the fibres after their solidification and thus forming a mat of packed fibres providing a filtering structure , and subjecting the filtering structure to chemical etching. | 11-14-2013 |
20130327006 | TERPOLYMER FOR MELT BLOWN MEDICA FOR AIR FILTRATION - Melt-blown fiber comprising a terpolymer of propylene, ethylene and a C | 12-12-2013 |
20130333341 | FLUTABLE FIBER WEBS WITH HIGH DUST HOLDING CAPACITY - 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. | 12-19-2013 |
20140047809 | FLUTABLE FIBER WEBS WITH HIGH DUST HOLDING CAPACITY - 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. | 02-20-2014 |
20140083066 | PROCESS FOR FORMING A HIGH EFFICIENCY NANOFIBER FILTER - A process for forming a high efficiency filter containing the steps of forming a non-woven layer having pores from a plurality thermoplastic fibers having a median diameter of less than about 2 micrometers, saturating the non-woven layer in a wetting liquid, and drying the wetted non-woven layer. | 03-27-2014 |
20140196424 | FILTER MEDIA INCLUDING GLASS FIBERS - The present disclosure generally relates to filter media including glass fibers. The fiber characteristics (e.g., composition, dimensions) are selected to impart the desired solubility, filtration and mechanical properties so that the filter media may be used in the desired application. | 07-17-2014 |
20140237968 | BI-COMPONENT FIBER AND FILTER MEDIA INCLUDING BI-COMPONENT FIBERS - A bi-component fiber is provided. The bi-component fiber includes a sheath formed of polyphenylene sulfide (PPS) and a core formed of a high glass transition polyester. A PPS material of the sheath has a higher melting point than a high glass transition polyester material of the core. The core is at least partially crystallized whereby the high glass transition polyester material of the core effectively has a higher softening point than a softening point of the PPS material of the sheath. | 08-28-2014 |
20180023215 | Adhering Nanofibers to Polymeric Media Using a High Temperature Singe | 01-25-2018 |
055528000 | Organic (e.g., vegetable) | 18 |
20090077938 | FILTER MATERIAL - A filter material fabricated by mixing 10 to 30% by mass of first fibers having a fiber diameter of 10 to 40 μm, 40 to 80% by mass of second fibers obtained by crimping natural fibers having a fiber diameter of 10 to 40 μm, and 10 to 30% by mass of third fibers having a fiber diameter of 5 to 10 μm. The filter material has low pressure loss a high dust holding amount, and high dust filtration efficiency. | 03-26-2009 |
20090272086 | NANOFIBER FILTER MEDIUM AND METHOD FOR MANUFACTURING THE SAME - Disclosed is a nanofiber filter medium formed by electrospinning, having a low pressure drop and high filtration performance. The nanofiber layer thereof is constructed by at least two nanofibers, uniformly entangled with each other, with different fiber diameter distributions. Therefore, the nanofiber filter medium of the invention is completed. The described nanofiber filter medium has a low pressure drop and high filtration performance. | 11-05-2009 |
20090277141 | POROUS POLYTETRAFLUOROETHYLENE MEMBRANE AND METHOD OF PRODUCING THE SAME, AND FILTER MEDIUM - First, a mixture of a polytetrafluoroethylene fine powder and a liquid lubricant into a sheet-form body extending in a first direction. Next, the liquid lubricant is removed from the sheet-form body. Then, the sheet-form body is stretched by a factor of 40 to 250 in the longitudinal direction at a temperature equal to or higher than a melting point of polytetrafluoroethylene, and the stretched sheet-form body is further stretched by a factor of 3 to 40 in the width direction. Thus, a highly air-permeable porous polytetrafluoroethylene membrane is obtained. | 11-12-2009 |
20100064647 | POLYMER OR OLIGOMER FIBERS BY SOLVENT-FREE ELECTROSPINNING - A process for fabricating fibers, including nano-scale fibers, comprising electrospinning a melt of a self assembling material and fibers fabricated by the process are disclosed. | 03-18-2010 |
20100175354 | POLYMER COMPOSITION AND MOLDED PRODUCTS FORMED THEREOF - The present invention provides a polymer composition including a first base polymer (A) containing at least a thermoplastic polymer, a second base polymer (B) containing at least a thermoplastic polymer and not having compatibility with the first base polymer (A), and an additive (C) containing at least a substance not having compatibility with any of the first base polymer (A) and the second base polymer (B), the additive (C) being in the form of liquid or slurry at the lower of a pyrolysis temperature of the first base polymer (A) and a pyrolysis temperature of the second base polymer (B). (A), (B) and (C) are phase-separated from each other, and interfaces each located between two of phases of (A), (B) and (C) contacting each other form three-dimensional continuous parallel interfaces. | 07-15-2010 |
20110005180 | REDUCED SOLIDITY WEB COMPRISING FIBER AND FIBER SPACER OR SEPARATION MEANS - A web can comprise a substantially continuous fiber mass and a separation means dispersed into the fiber. The web having a preferred thickness resulting from forming a polymer material and a particulate into a fine fiber layer can have a variety of end uses. A filtration media can include a structure comprising such a web of fine fiber and a substantial volume of particulate embodiment of the separation means. The resulting fine fiber structure provides an improved filtration medium having substantial depth, thickness, and a layered structure. The improved properties of the web results from inclusion of the separation or spacer particulate. | 01-13-2011 |
20130212993 | MELT BLOWN MEDIA FOR AIR FILTRATION - 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 MFR | 08-22-2013 |
20130269304 | FIBER WEB, PREPARATION METHOD THEREOF, AND FILTER INCLUDING FIBER WEB - 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. | 10-17-2013 |
20140230390 | FIBERS MADE FROM SOLUBLE POLYMERS - 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. | 08-21-2014 |
20140250848 | Filter Media - 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/m | 09-11-2014 |
20140305090 | MIXED-FIBER NONWOVEN FABRIC, LAMINATED SHEET AND FILTER, AND PROCESS FOR PRODUCING MIXED-FIBER NONWOVEN FABRIC (AS AMENDED) - 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 μm to 100 μm 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 μm to 10 μm. | 10-16-2014 |
20150013296 | POLYPHENYLENE SULFIDE FIBER, FILTER CLOTH COMPRISING POLYPHENYLENE SULFIDE FIBER, AND METHOD FOR PRODUCING POLYPHENYLENE SULFIDE FIBER - 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. | 01-15-2015 |
20150107208 | FIBER WEBS INCLUDING SYNTHETIC FIBERS - 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. | 04-23-2015 |
20150135668 | FILTER MEDIUM CONSISTING OF SYNTHETIC POLYMER - 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. | 05-21-2015 |
20160074790 | MIXED FIBER NONWOVEN FABRIC AND A PRODUCTION METHOD THEREFOR (AS AMENDED) - A mixed fiber nonwoven fabric comprising at least two types of fibers, namely, fibers of polyolefin based resin component A and fibers of polyolefin based resin component B, a fiber group containing fibers of polyolefin based resin component A being referred to as first fiber group, the first fiber group having a number average fiber diameter of 0.3 μm to 7.0 μm, part of the fibers of polyolefin based resin component B that have a fiber diameter in the range of 15 μm to 100 μm and not less than 5 times the number average fiber diameter of the first fiber group being referred to as second fiber group, the fibers of the second fiber group maintaining a form of fibers and existing in the cross section of the mixed fiber nonwoven fabric at a rate of 7.0 fibers or more per millimeter of the cross-sectional length, the melting point of polyolefin based resin component B being lower by 5° C. to 40° C. than that of polyolefin based resin component A, and the number average fiber diameter of the mixed fiber nonwoven fabric as a whole being 0.3 μm to 10 μm. | 03-17-2016 |
20160158677 | FINE FIBER FILTER MEDIA AND PROCESSES - Fine fiber products including fiber webs, as well as related assemblies, systems and methods, are described. In some embodiments, fiber webs described herein may include fine fibers and relatively low amounts of degraded polymer formed during a fiber extrusion process. The fiber webs may be used for filter media applications. | 06-09-2016 |
20170232371 | FILTER MEDIA INCLUDING A FILTRATION LAYER COMPRISING SYNTHETIC FIBERS | 08-17-2017 |
20170232372 | FILTER MEDIA INCLUDING FLAME RETARDANT FIBERS | 08-17-2017 |