Abstract: The use of an aqueous polymer dispersion comprising dispersed particles of at least one polymer A1 obtainable by free-radical emulsion polymerization in the presence of a polymer A2 synthesized from from 50 to 99.5% by weight of at least one ethylenically unsaturated monocarboxylic and/or dicarboxylic acid, from 0.5 to 50% by weight of at least one ethylenically unsaturated compound selected from the esters of ethylenically unsaturated monocarboxylic acids and the monoesters and diesters of ethylenically unsaturated dicarboxylic acids with an amine containing at least one hydroxyl group, up to 20% by weight of at least one further monomer as a binder for producing filter materials.

Abstract: The invention is directed to a microbiological interception enhanced filter medium, preferably having an adsorbent prefilter located upstream from the filter medium. Preferably, the prefilter is adapted to remove natural organic matter in an influent prior to the influent contacting the microbiological interception enhanced filter medium, thereby preventing loss of charge on the filter medium. The microbiological interception enhanced filter medium is most preferably comprised of fibrillated cellulose fibers, in particular, lyocell fibers. At least a portion of the surface of the at least some of the fibers have formed thereon a microbiological interception enhancing agent comprising a cationic metal complex. A filter medium of the present invention provides greater than about 4 log viral interception, and greater than about 6 log bacterial interception.

Abstract: The invention is directed to a microbiological interception enhanced filter medium, preferably having an adsorbent prefilter located upstream from the filter medium. Preferably, the prefilter is adapted to remove natural organic matter in an influent prior to the influent contacting the microbiological interception enhanced filter medium, thereby preventing loss of charge on the filter medium. The microbiological interception enhanced filter medium is most preferably comprised of fibrillated cellulose fibers, in particular, lyocell fibers. At least a portion of the surface of the at least some of the fibers have formed thereon a microbiological interception enhancing agent comprising a cationic metal complex. A filter medium of the present invention provides greater than about 4 log viral interception, and greater than about 6 log bacterial interception.

Abstract: A filter for processing a biological fluid is disclosed comprising at least two filter elements wherein the surface of one filter element is substantially non-hydroxylated and has a nitrogen-to-oxygen ratio in the range of from at least 0.01 to less than about 1.00, and the surface of the other filter element is hydroxylated relative to the bulk of the element.

Abstract: The present invention is directed to a filter media comprised of an electro-conductive scrim so as to improve on the dissipation time of an electrostatic charge. Further, the present invention is directed to a method of making such a filter media, which is formed through hydroentanglement, thus avoiding the deleterious effects of mechanical needling, while providing a filter media having the requisite strength characteristics, without possessing a limiting factor in performance. The filtration media of the present invention also demonstrates a highly desirable uniformity for cost-effective use.

Abstract: The invention is directed to a microbiological interception enhanced filter medium, preferably having an adsorbent prefilter located upstream from the filter medium. Preferably, the prefilter is adapted to remove natural organic matter in an influent prior to the influent contacting the microbiological interception enhanced filter medium, thereby preventing loss of charge on the filter medium. The microbiological interception enhanced filter medium is most preferably comprised of fibrillated cellulose fibers, in particular, lyocell fibers. At least a portion of the surface of the at least some of the fibers have formed thereon a microbiological interception enhancing agent comprising a cationic metal complex. A filter medium of the present invention provides greater than about 4 log viral interception, and greater than about 6 log bacterial interception.

Abstract: A filter medium formed from a web of ceramic fibers, pleated and integrated into a coherent unit employing a ceramic sol. A method is disclosed.

Abstract: A collector 3 capable of collecting and sampling simultaneously various types of chlorinated organic compounds in both particulate and gaseous forms contained in a fluid and easy to extract the sampled chlorinated organic compounds therefrom includes a sampling filter 7 installed in a holder 6 having a discharge route 12a. The sampling filter 7 contains fibers and an inorganic binder for binding the fibers to one another and has a fluid-permeability. Various types of the chlorinated organic compounds such as dioxins and coplanar PCBs in both particulate and gaseous forms contained in a sample gas flowing into the holder 6 from a flue duct 25 through a sampling pipe 2 and an introduction pipe 8 are collected and sampled while the sample gas being passed through the sampling filter 7 and the resulting sample gas from which the chlorinated organic compounds are removed is then discharged out to the outside through the discharge route 12a.

Abstract: A thermally stable, non-woven, fibrous paper comprising at least one polymer represented by structural formula I: wherein R1-6 are the same or different and comprise H, a hydroxyl group, a straight or branched alkyl, cycloalkyl, polycycloalkyl, heterocycloalkyl, alkaryl, alkoxy, aryl, aralkyl, alkenyl, or alkynyl group containing approximately 1 to approximately 50 carbon atom(s), carbonyls, esters, carbonates, amides, ketenes, epoxides, a silyl or siloxyl group containing approximately 1 to approximately 50 silicon atom(s), and combinations thereof; wherein X1-4 are the same or different and comprise N, O, S, or Se; and wherein n is an integer ranging in value from 1 to approximately 10,000.

Abstract: A chelate-forming filter which comprises a filter medium made of natural, regenerated, or synthetic fibers wherein the fiber molecules have, incorporated therein, chelate-forming functional groups represented by general formula (1) [wherein G represents a residue of a chain sugar alcohol or of a polyhydric alcohol; and R represents hydrogen, (lower) alkyl, or -G (wherein G has the same meaning as the above G, and the two G's may be the same or different)] or (3) (wherein R1, R2, and R3 each represents lower alkylene; and n is an integer of 1 to 4).

Abstract: The present invention is directed to a microporous filter medium treated with a microbiological interception enhancing agent comprising a cationic chemical having a medium to high charge density and a molecular weight greater than about 5000 Daltons, adsorbed on at least a portion of the microporous structure, and a biologically active metal in direct proximity to the cationic chemical and also on at least a portion of the microporous structure, wherein the flow of fluid through the filter medium decreases in response to an amount of polyanionic acids present in an influent. Robust microbiological interception is still maintained due to the extended empty bed contact time as a result of the diminished flow rate.

Abstract: The invention is directed to a microbiological interception enhanced filter medium, preferably having an adsorbent prefilter located upstream from the filter medium. Preferably, the prefilter is adapted to remove natural organic matter in an influent prior to the influent contacting the microbiological interception enhanced filter medium, thereby preventing loss of charge on the filter medium. The microbiological interception enhanced filter medium is most preferably comprised of fibrillated cellulose fibers, in particular, lyocell fibers. At least a portion of the surface of the at least some of the fibers have formed thereon a microbiological interception enhancing agent comprising a cationic metal complex. A filter medium of the present invention provides greater than about 4 log viral interception, and greater than about 6 log bacterial interception.

Abstract: The invention discloses a drinking straw with an integral filtration system including a plurality of filter types to extract or neutralize toxins such as heavy metals, chemicals, microbiological biological cysts and other such impurities and contaminants from a beverage as it is being consumed.

Abstract: Disclosed is an integrated paper wherein the paper has capabilities and functionalities provided by both the fiber and the active agent ingredients, and a method of immobilizing the active agents within the integrated paper. The tight pore structure of the integrated paper of the present invention, a mean pore diameter of less than about 2 microns, provides short diffusion distances from a fluid to the surface of the paper ingredients by adsorption or diffusive interception making it an excellent medium for fluid filtration. The integrated paper of the present invention can further include a microbiological interception enhancing agent. The integrated paper can be formed using, preferably, wet laid paper-making processes for speed and efficiency. Also disclosed are devices utilizing the integrated paper useful in fluid filtration.

Abstract: A nanoengineered membrane for controlling material transport (e.g., molecular transport) is disclosed. The membrane includes a substrate, a cover defining a material transport channel between the substrate and the cover, and a plurality of fibers positioned in the channel and connected to and extending away from a surface of the substrate. The fibers are aligned perpendicular to the surface of the substrate, and have a width of 100 nanometers or less. The diffusion limits for material transport are controlled by the separation of the fibers. In one embodiment, chemical derivatization of carbon fibers may be undertaken to further affect the diffusion limits or affect selective permeability or facilitated transport. For example, a coating can be applied to at least a portion of the fibers. In another embodiment, individually addressable carbon nanofibers can be integrated with the membrane to provide an electrical driving force for material transport.

Abstract: A method and device for the filtration and/or purification of fluids water or other solutions containing microbiological and chemical contaminants, such as fluids containing cysts, bacteria and/or viruses, and heavy metals and/or pesticides, where the fluid is passed through a purification material composed of magnesium containing mineral and more preferably silicates containing magnesium, oxides containing magnesium, hydroxides containing magnesium, and phosphates containing magnesium and absorption media in a fixed binder matrix.

Abstract: The present invention is directed to a composite filter medium having a pH altering material that can raise the pH of an influent such that microbiological contaminants in the influent remain substantially negatively charged such that a positively charged medium within the composite filter medium can more effectively capture the microbiological contaminants.

Abstract: A filter element (30) which has a filtering medium (31) formed by ruffling a fiber sheet and a resin frame (32) surrounding the perimeter of the filtering medium (31); and a filtering medium (31) which comprises a fiber sheet comprising a heat-resistant fiber having a melting temperature or a carbonization temperature of 300° C. or higher. As the heat-resistant fiber, use can be made of a meta-type or para-type wholly aromatic polyamide fiber, a wholly aromatic polyester fiber, a polyphenylene sulfide fiber, or a polyamideimide fiber. As a fiber constituting the fiber sheet except the heat-resistant fiber, use can be made of a fiber having a softening point of 150° C. or higher such as a polyamide based fiber, a polyester based fiber, an acrylic fiber, or a vinylon fiber. Preferably, the heat-resistant fiber accounts for 3 mass % or more of the fiber sheet The filtering medium is suppressed in the reduction of bursting strength during use and causes no substantial problems in practical use.

Abstract: A non-woven polymeric matrix for separating leukocytes from a blood sample includes a non-woven three dimensional matrix formed from polymeric fibers having a predetermined pore volume fraction including a defined channel configuration, a predetermined pore size in the range of from about 10 &mgr;m to about 250 &mgr;m, and a plurality of connections between the plurality of fibers. The matrix is configured so as to remove at least about 98% of leukocytes from at least one unit of packed red blood cells. Methods of making and using the matrix are also provided.

Abstract: Described are a filter material which contains heatsealable, biodegradable and compostable polymeric fibers and is characterized in that it additionally contains a lubricant in an amount from 0.5 to 5.0% by weight, based on the paper weight of the ready-produced filter material, and also processes for producing same.

Abstract: A filter production method produces a filter having a shape substantially identical to the shape of a forming surface by extruding semi-molten fibers to the forming surface. When the semi-molten fibers are extruded to the forming surface, the semi-molten fibers are gathered to upstanding surface portions of the forming surface. Therefore, a sufficient amount of fibers can be layered onto the upstanding surface portions, so that the layering amount of fibers on the upstanding surface portions of the forming surface will not be considerably reduced in comparison with the layering amounts on other portions of the forming surface.

Abstract: A filter material includes a filter pad made from a thin, nonwoven fiber mat which has been accordion-pleated, compressed into a unit having a large number of substantially parallel interconnected filter strips, and treated to retain the filter strips in substantially parallel relation to each other. In a preferred embodiment, activated carbon particles are operatively associated with the filter pad. Selected fibers of the nonwoven fiber material are hollow fibers, each having an outer surface, a hollow internal cavity, and an extended slot formed therein, between the hollow internal cavity and the outer fiber surface. Carbon particles may be located between selected filter strips, and additional carbon particles may be disposed within the cavities of the hollow fibers. Methods of forming the filter material, and a filter element made with the filter material are also disclosed.

Abstract: A fluid contaminant collection system is provided where a filter passively interacts with the fluid to remove contaminants from the fluid. The system includes a wall defining at least a portion of a chamber or passageway. Located within the chamber or passageway is the filter. The filter includes a contaminant removal portion and is located within the chamber or housing to interact with the fluid. During interaction between the fluid and the filter, the fluid passes or washes over the filter and contaminants are removed by the contaminant removal portion from the fluid.

Abstract: A dimensionally stable, flow-porous fluid treatment element suitable for hot fluid treatment, in particular a filter element, characterized by the following components: (a) inorganic solid particles with inner voids; and (b) hardened binder on a water glass base, (c) the binder holding together the solid particles to form the flow-porous fluid treatment element.

Abstract: A transmission fluid filter material and transmission filter produced therefrom comprising a gradient density composite felt which exhibits high particle removal efficiency at 40 micron diameter particle size and larger with exceptionally high dirt holding capacity and no significant increase in clean pressure drop. The upstream portion of the composite felt contains fine fibers that selectively remove first the fine particles while the downstream portion acts to sieve coarse particles and build a porous filter cake, thereby extending the useful life of the filter.

Abstract: Structures treated with a microbiological interception enhancing agent comprising of a water-soluble cationic material having a counter ion associated therewith at specific sites on the cationic material, in combination with a biologically active metal salt, wherein the counter ion associated with the cationic material preferentially precipitates with at least a portion of the cation of the biologically active metal salt such that precipitation of the biologically active metal cation and the counter ion associated with the cationic material occurs in proximity to the cationic material are disclosed herein. The microbiological interception enhancing agent may be incorporated into articles of commerce by treating the starting materials of the structure or by applying the microbiological interception enhancing agent on to at least one surface of the article.

Abstract: Large diameter nodes integrally formed on a linear fiber at an appropriate interval to form a fiber body, so that multiple fiber bodies are attached to a support member in a state where slits are formed between adjoining fibers due to the large diameter nodes by arranging multiple fiber bodies in parallel with one another or laminating the multiple fiber bodies with one another. It is preferable that a thickness of the fiber of the fiber body is set to range from 0.003 to 0.05 mm, and an outer diameter of each large diameter node is set to be 1.03 to 1.50 times as large as the thickness of the fiber, and an interval of the large diameter nodes is set to be 5 to 100 times as large as the thickness of the fiber. With such a construction, it is possible to obtain the filtrating filter which is simple in construction and manufactured with ease, particularly capable of easily forming slits to have an arbitrary size through which liquid or gas to be suitably filtrated.

Abstract: The invention is directed to a precoat or body feed composition comprising a microbiological interception enhanced filter aid. Preferably, the microbiological interception enhanced filter aid comprises fibrillated lyocell nanofibers having coated on at least a portion of a surface thereof, a microbiological interception enhancing agent. The microbiological interception enhanced agent comprises a cationic material in combination with a biologically active metal. At least about 4 log reduction in bacterial interception is achieved with the microbiological interception enhanced filter aid alone or in combination with a bulk, untreated filter aid. A precoat composition including the microbiological interception enhanced filter aid can be used for one-step cold sterilization of beverages.

Abstract: A unique filtration device (10) which removes metal ions from a contaminated aqueous stream through the use of partially hollow wicking fibers (20) impregnated with a selected liquid (18) which can capture the metal ions in the aqueous stream. The wicking fibers (20) are formed into a filter element (12) which extends from a chamber (16) through which the aqueous stream is directed into a chamber (18) wherein the unwanted metal ions are removed from the extracting liquid (18). The wicking fibers (20) include internal longitudinal cavities (22) each with a relatively small longitudinal extending opening (24). The wicking fibers (20) are filled with the selected liquid extraction (18) which remains within the fiber through capillary action by which capillary action the individual wicking fibers (20) rapidly draw the selected liquid,(18) with which they comes into contact, through the internal cavities (22).

Abstract: A filter medium and frame therefore wherein the filter medium is treated by a novel adhesive comprised of a major portion by weight of an oil group consisting of vegetable and animal oils and a minor portion of a preselected thickening material with the rigidity of the filter medium being obtained by sandwiching the filter medium between joined mating upstream and downstream frame members.

Abstract: The invention is directed to a microbiological interception enhanced filter medium, preferably having an adsorbent prefilter located upstream from the filter medium. Preferably, the prefilter is adapted to remove natural organic matter in an influent prior to the influent contacting the microbiological interception enhanced filter medium, thereby preventing loss of charge on the filter medium. The microbiological interception enhanced filter medium is most preferably comprised of fibrillated cellulose fibers, in particular, lyocell fibers. At least a portion of the surface of the at least some of the fibers have formed thereon a microbiological interception enhancing agent comprising a cationic metal complex. A filter medium of the present invention provides greater than about 4 log viral interception, and greater than about 6 log bacterial interception.

Abstract: A phase-separation member comprises a porous substrate (11) containing void spaces, a microporous polymer material (14) which at least partially impregnates the porous substrate by entering into the void spaces, and a layer of a fluoropolymer applied to the outer face of the coagulated polymer material so that the layer (16) of fluoropolymer material remains predominantly at the surface.

Abstract: A filter medium formed from a web of ceramic fibers, pleated and integrated into a coherent unit employing a ceramic sol. A method is disclosed.

Abstract: The invention is directed to a microbiological interception enhanced filter medium, preferably having an adsorbent prefilter located upstream from the filter medium. Preferably, the prefilter is adapted to remove natural organic matter in an influent prior to the influent contacting the microbiological interception enhanced filter medium, thereby preventing loss of charge on the filter medium. The microbiological interception enhanced filter medium is most preferably comprised of fibrillated cellulose fibers, in particular, lyocell fibers. At least a portion of the surface of the at least some of the fibers have formed thereon a microbiological interception enhancing agent comprising a cationic metal complex. A filter medium of the present invention provides greater than about 4 log viral interception, and greater than about 6 log bacterial interception.

Abstract: The invention is directed to a microbiological interception enhanced filter medium, preferably having an adsorbent prefilter located upstream from the filter medium. Preferably, the prefilter is adapted to remove natural organic matter in an influent prior to the influent contacting the microbiological interception enhanced filter medium, thereby preventing loss of charge on the filter medium. The microbiological interception enhanced filter medium is most preferably comprised of fibrillated cellulose fibers, in particular, lyocell fibers. At least a portion of the surface of the at least some of the fibers have formed thereon a microbiological interception enhancing agent comprising a cationic metal complex. A filter medium of the present invention provides greater than about 4 log viral interception, and greater than about 6 log bacterial interception.

Abstract: The invention is directed to a microbiological interception enhanced filter medium, preferably having an adsorbent prefilter located upstream from the filter medium. Preferably, the prefilter is adapted to remove natural organic matter in an influent prior to the influent contacting the microbiological interception enhanced filter medium, thereby preventing loss of charge on the filter medium. The microbiological interception enhanced filter medium is most preferably comprised of fibrillated cellulose fibers, in particular, lyocell fibers. At least a portion of the surface of the at least some of the fibers have formed thereon a microbiological interception enhancing agent comprising a cationic metal complex. A filter medium of the present invention provides greater than about 4 log viral interception, and greater than about 6 log bacterial interception.

Abstract: The invention is directed to a microbiological interception enhanced filter medium, preferably having an adsorbent prefilter located upstream from the filter medium. Preferably, the prefilter is adapted to remove natural organic matter in an influent prior to the influent contacting the microbiological interception enhanced filter medium, thereby preventing loss of charge on the filter medium. The microbiological interception enhanced filter medium is most preferably comprised of fibrillated cellulose fibers, in particular, lyocell fibers. At least a portion of the surface of the at least some of the fibers have formed thereon a microbiological interception enhancing agent comprising a cationic metal complex. A filter medium of the present invention provides greater than about 4 log viral interception, and greater than about 6 log bacterial interception.

Abstract: Shaped articles which are suitable as biocidal depth-type filters and consist of fibrous materials and particles, embedded therein, of crosslinked crospovidone-iodine or crospovidone-hydrogen peroxide.

Abstract: Solvent-resistant polybenzimidazole membranes, methods of making them and crosslinking them and composite membranes and hollow fiber membrane modules from them are disclosed.

Abstract: Disclosed is a fibrous absorbent structure that is wet stable and has large void volume with a density below the critical density of the fiber employed. In one embodiment, the fibrous absorbent uses open-celled foam technologies to keep the fibrous structure expanded and bonded. In other embodiments, the resulting fibrous structure resembles an open-celled polymeric foam, with fibers serving as struts stabilized by binder material. In another embodiment, the resulting fibrous structure is filled with hydrophilic open-celled foams with the cell size substantially smaller than the fibrous pores. Such a wet-stable, high void volume fibrous absorbent can be used in a disposable product intended for the absorption of fluid such as body fluid, including extensible absorbent articles.

Abstract: A filter coalescer cartridge for treating jet fuels comprising spaced apart filter/coalescer layers to effectively remove particulate contaminants and water from the transient fuel being treated.

Abstract: A filter for removing microorganisms from a fluid is provided by the invention. The filter includes a substrate having a reactive surface, and a polymer covalently bonded to the reactive surface of the substrate. The polymer includes a plurality of cationic groups for attracting microorganisms. Faucet mounted filters and pour through filters containing the polymer coated substrate are provided. Also disclosed are methods for using and manufacturing filters for removing microorganisms from a fluid.

Abstract: A non-woven melt-blown filament medium includes a mass of essentially continuous melt-blown polymer filaments and an essentially continuous traversing melt-blown polymer filament extending through the mass. The mass has a depth dimension, a longitudinal dimension, and a latitudinal dimension. The mass includes a plurality of layers, each of the plurality of layers being generally oriented in the longitudinal and latitudinal dimensions. The traversing filament is generally oriented in the depth dimension and extends through at least one layer of the mass. In one embodiment, the mass is cylindrical in shape and the layers comprise concentric zones. The traversing filament is intentionally deposited and positioned to improve the physical properties of the mass.

Abstract: Devices, systems and methods for treating a biological fluid are provided comprising placing the fluid in contact with a complement filter capable of depleting at least one complement fragment from the fluid while at least one component of the biological fluid is being stored.

Abstract: A composite filter medium for removing at least 99.95 percent of particulates of a size in the 3 to 4 micron range and dissolved chemical contaminants from a fluid and filters of various configurations employing the composite filter medium are disclosed. The composite filter medium comprises an adsorbent layer containing an adsorbent agent and a hydrophilic particulate intercepting layer disposed adjacent to the adsorbent layer. The composite medium has a mean flow pore diameter of about 1 to 10 microns, a bubble point of about 3 to 15 microns and an air permeability of about 0.5 to 7 liters per minute/cm2 with a pressure drop of about 0.1 bar.

Abstract: A disposable, biodegradable bag for purifying waste liquid flow from cement disposing, installation, and construction operations, comprising, a first porous bag element and a second porous bag element, the second bag element is operably positioned within the first porous bag element. A paper filter for filtering waste liquid flow is operably positioned between the first and the second porous bag elements, and a fastening rope or strap for securing the disposable biodegradable bag to a chute of a cement dispenser or other cement dispensing mechanism is secured to the disposable and biodegradable bag.

Abstract: A high capacity leukocyte depletion filtration media incorporates a high specific surface area components with a matrix of fibers, yielding a filtration medium that removes leukocytes by at least 99.99%. The filtration medium uses a significantly low weight ratio of high specific surface area components to the matrix of fibers. The high specific area creates a multitude of adhesion sites for leukocytes while the low weight ratios allow good filtration flow rates. The filtration medium is incorporated into a filter device for removing leukocytes from biological fluids.

Abstract: The invention concerns a filter material characterized in that it is impregnated with an amphiphilic substance or with a hydrophilic and a hydrophobic substance to control the water wettability and water absorption.

Abstract: A transmission fluid filter material and transmission filter produced therefrom comprising a gradient density composite felt which exhibits high particle removal efficiency at 40 micron diameter particle size and larger with exceptionally high dirt holding capacity and no significant increase in clean pressure drop. The upstream portion of the composite felt contains fine fibers that selectively remove first the fine particles while the downstream portion acts to sieve coarse particles and build a porous filter cake, thereby extending the useful life of the filter.

Abstract: A collector 3 capable of collecting and sampling simultaneously various types of chlorinated organic compounds in both particulate and gaseous forms contained in a fluid and easy to extract the sampled chlorinated organic compounds therefrom includes a sampling filter 7 installed in a holder 6 having a discharge route 12a. The sampling filter 7 contains fibers and an inorganic binder for binding the fibers to one another and has a fluid-permeability. Various types of the chlorinated organic compounds such as dioxins and coplanar PCBs in both particulate and gaseous forms contained in a sample gas flowing into the holder 6 from a flue duct 25 through a sampling pipe 2 and an introduction pipe 8 are collected and sampled while the sample gas being passed through the sampling filter 7 and the resulting sample gas from which the chlorinated organic compounds are removed is then discharged out to the outside through the discharge route 12a.