Filter media comprising a pre-filter layer and related components, systems, and methods associated therewith are provided. In some embodiments, the pre-filter layer may be designed to impart desirable properties to the filter media, such as a high gamma and/or long service life, while having relatively minimal or no adverse effects on another property of the filter media that is important for a given application. For instance, a pre-filter layer may be used to improve the upstream removal of fine particulate matter, which may clog a downstream efficiency layer comprising submicron fibers and reduce filtration performance. The pre-filter layer may be configured to increase service life and/or increase the gamma of the filter media. Filter media, as described herein, may be particularly well-suited for applications that involve filtering air, though the media may also be used in other applications.
B01D 46/62 - Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
B01D 39/16 - Other self-supporting filtering material of organic material, e.g. synthetic fibres
A41D 13/11 - Protective face masks, e.g. for surgical use, or for use in foul atmospheres
B01D 46/52 - Particle separators, e.g. dust precipitators, using filters embodying folded material
B01D 46/54 - Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
Battery separators comprising ribs are generally described. In some embodiments, the ribs have one or more features that enhance the performance of the battery separator.
H01M 50/463 - Separators, membranes or diaphragms characterised by their shape
H01M 50/457 - Separators, membranes or diaphragms characterised by the material having a layered structure comprising three or more layers
H01M 50/446 - Composite material consisting of a mixture of organic and inorganic materials
H01M 50/454 - Separators, membranes or diaphragms characterised by the material having a layered structure comprising a non-fibrous layer and a fibrous layer superimposed on one another
Filtration articles and filter elements comprising reversibly stretchable layer filter media are generally provided. The filtration articles and filter elements described herein may be used for various applications, including applications as a respirator or respiratory protective equipment, a medical filter, an indoor air filtration article for HVAC and HEPA applications, a cabin air filter for vehicles, a room air purifier filter, a vacuum cleaner filter, a heavy duty air filter, a hydraulic fluid filter, and a process liquid filtration filter.
Filter media comprising non-woven fiber webs having one or more advantageous physical properties are generally described. In some embodiments, a filter media and/or non-woven fiber web described herein comprises a combination of fibers that results in enhanced physical properties. For example, the non-woven fiber web may comprise a combination of fiber types that is advantageous, such as a combination comprising fibrillated fibers, glass fibers, and/or binder fibers. In some cases, the filter media and/or non-woven fiber web comprising the combination of fibers may be formed into undulations (e.g., by a creping and/or microcreping process) to further enhance the physical properties of the filter media and/or non-woven fiber.
Thermal insulation materials for batteries are generally described. The thermal insulation materials described herein have a number of advantages. For example, in some embodiments, the thermal insulation materials have desirable thermal properties, such as low thermal conductivity and/or high thermal stability. As another example, in some embodiments, the thermal insulation materials described herein have desirable structural properties, such as having a relatively low thickness, and/or beneficial mechanical properties. The thermal insulation materials described herein may also have a combination of desirable thermal and structural properties.
Thermal insulation materials for batteries are generally described. The thermal insulation materials described herein have a number of advantages. For example, in some embodiments, the thermal insulation materials have desirable thermal properties, such as low thermal conductivity and/or high thermal stability. As another example, in some embodiments, the thermal insulation materials described herein have desirable structural properties, such as having a relatively low thickness, and/or beneficial mechanical properties. The thermal insulation materials described herein may also have a combination of desirable thermal and structural properties.
H01M 10/658 - Means for temperature control structurally associated with the cells by thermal insulation or shielding
H01M 10/651 - Means for temperature control structurally associated with the cells characterised by parameters specified by a numeric value or mathematical formula, e.g. ratios, sizes or concentrations
D04H 1/732 - Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by fluid current, e.g. air-lay
D04H 1/4391 - Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece characterised by the shape of the fibres
D04H 1/58 - Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
Articles and methods involving filter media are generally provided. In certain embodiments, a filter media has a design and/or comprises one or more layers that enhances its efficiency and/or performance.
B01D 46/62 - Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
B01D 39/16 - Other self-supporting filtering material of organic material, e.g. synthetic fibres
B01D 46/00 - Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
B01D 46/12 - Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces in multiple arrangements
10.
FILTER MEDIA INCLUDING FIBERS COMPRISING POLYVINYLIDENE FLUORIDE AND/OR A COPOLYMER THEREOF, AND RELATED METHODS
Articles and methods involving filter media are generally provided. In certain embodiments, a filter media has a design and/or comprises one or more layers that enhances its efficiency and/or performance.The filter media comprises a first layer and a second layer. The first layer having an average diameter of less than 1 micron.
B01D 46/00 - Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
B01D 29/01 - Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups ; Filtering elements therefor with flat filtering elements
B01D 39/16 - Other self-supporting filtering material of organic material, e.g. synthetic fibres
12.
FILTER MEDIA INCLUDING FIBERS COMPRISING POLYVINYLIDENE FLUORIDE AND/OR A COPOLYMER THEREOF, AND RELATED METHODS
Articles and methods involving filter media are generally provided. In certain embodiments, the filter media includes at least a first layer, a second layer, and an adhesive resin positioned between the first layer and the second layer. In some embodiments, the first layer may be a pre-filter layer or a support layer. The second layer may, for example, comprise fibers formed by a solution spinning process and/or may comprise fine fibers. In some embodiments, the adhesive resin may be present in a relatively low amount and/or may have a low glass transition temperature. The filter media as a whole may have one or more advantageous properties, including one or more of a high stiffness, a high bond strength between the first layer and the second layer, a high gamma, and/or a low increase in air resistance after being subjected to an IPA vapor discharge. The filter media may be, for example, a HEPA filter and/or an ULPA filter.
B01D 39/14 - Other self-supporting filtering material
B01D 46/62 - Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
B01D 39/16 - Other self-supporting filtering material of organic material, e.g. synthetic fibres
B01D 39/18 - Other self-supporting filtering material of organic material, e.g. synthetic fibres the material being cellulose or derivatives thereof
B01D 39/20 - Other self-supporting filtering material of inorganic material, e.g. asbestos paper or metallic filtering material of non-woven wires
B01D 46/00 - Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
16.
ARTICLES COMPRISING BINDERS, CROSS-LINKING AGENTS AND/OR OTHER COMPONENTS, AND RELATED METHODS
Filter media comprising non-woven fiber webs having one or more advantageous physical properties are generally described. In some embodiments, a filter media and/or non-woven fiber web described herein comprises a combination of fibers that results in enhanced physical properties. For example, the non-woven fiber web may comprise a combination of fiber types that is advantageous, such as a combination comprising fibrillated fibers, glass fibers, and/or binder fibers. In some cases, the filter media and/or non-woven fiber web comprising the combination of fibers may be formed into undulations (e.g., by a creping and/or microcreping process) to further enhance the physical properties of the filter media and/or non-woven fiber.
Filter media having a relatively small pore size and related components, systems, and methods associated therewith are provided. The filter media may include a fibrous efficiency layer, a fibrous support layer, and a third layer adjacent to the efficiency layer. The efficiency layer may impart a relatively homogeneous pore structure to the filter media without adding substantial bulk to the filter media. The support layer may promote the homogeneity of the pore structure. For example, the support layer may prevent and/or minimize defects in the relatively thin efficiency layer that may result from manufacturing and/or processing. The third layer may serve to impart beneficial filtration (e.g., efficiency, dust holding capacity) and/or non-filtration (e.g., layer protection) properties to the filter media without adversely affecting one or more properties of the filter media. Filter media, as described herein, may be particularly well-suited for applications that involve liquid filtration, amongst other applications.
Articles and methods relating to filter media are generally provided. In some embodiments, a filter media has an irregular surface structure. For instance, the filter media may comprise a plurality of peaks that are irregular in one or more ways. A ratio of a peak height standard deviation to an average peak height may be greater than or equal to 0.05, and/or a ratio of a peak spacing standard deviation to an average peak spacing may be greater than or equal to 0.08. In some embodiments, a filter media comprises a non-woven fiber web having a layer thickness of greater than 0.3 mm and/or a stiffness of less than or equal to 100 mg.
Articles and methods relating to filter media are generally provided. In some embodiments, a filter media has an irregular surface structure. For instance, the filter media may comprise a plurality of peaks that are irregular in one or more ways. A ratio of a peak height standard deviation to an average peak height may be greater than or equal to 0.05, and/or a ratio of a peak spacing standard deviation to an average peak spacing may be greater than or equal to 0.08. In some embodiments, a filter media comprises a non-woven fiber web having a layer thickness of greater than 0.3 mm and/or a stiffness of less than or equal to 100 mg.
17 - Rubber and plastic; packing and insulating materials
Goods & Services
Nonwoven filtration materials made of synthetic fibers for
cabin air filtration composed of polymeric fibers for
conversion into cabin air filters; nonwoven filtration
materials made of synthetic fibers and adsorptive particles
for cabin air filtration composed of polymeric fibers for
conversion into cabin air filters.
22.
FILTER MEDIA INCLUDING ADHESIVES AND/OR OLEOPHOBIC PROPERTIES
Articles and methods involving filter media are generally provided. In certain embodiments, the filter media includes at least a first layer, a second layer, and an adhesive resin positioned between the first layer and the second layer. In some embodiments, the first layer may be a pre-filter layer or a support layer. The second layer may, for example, comprise fibers formed by a solution spinning process and/or may comprise fine fibers. In some embodiments, the adhesive resin may be present in a relatively low amount and/or may have a low glass transition temperature. The filter media as a whole may have one or more advantageous properties, including one or more of a high stiffness, a high bond strength between the first layer and the second layer, a high gamma, and/or a low increase in air resistance after being subjected to an IPA vapor discharge. The filter media may be, for example, a HEPA filter and/or an ULPA filter.
Articles such as filter media, which include dendrimers and/or other components, are provided. The filter media may further include a water repellant (e.g., a fluorinated species) to impart desirable properties to the media such as high water repellency. The filter media may also have a high efficiency as a function of pressure drop (i.e., high gamma values). In some embodiments, the filter media includes a fiber web which may be formed of various components such as glass fibers. The fiber web can also include additional components such as synthetic fibers, binder components, as well as other additives. The media may be incorporated into a variety of filter element products.
Filter media, filter elements, and methods for filtering an gas stream are described herein. In some embodiments, the filter media may comprise a fiber web comprising a plurality of fibers and having a particular oil repellency level. For instance, in certain embodiments, the surface chemistry of the fiber web may be tailored to impart a particular surface energy density that matches the surface energy density of the fluid (e.g., an oil, a lubricant, and/or a cooling agent) being removed from the gas stream. In some embodiments, the fiber web may be wrapped around a core. For example, the fiber web may be wrapped around the core such that it forms two or more layers around the core. In some cases, the fiber web may be perforated. In certain embodiments, an gas stream comprising a fluid (e.g., an oil, a lubricant, and/or a cooling agent) may be passed through the fiber web, filter media, and/or filter element such that at least a portion of the fluid coalesces on the fiber web. Fiber webs, filter media, and/or filter elements as described herein may be particularly well-suited for applications that involve filtering gas streams containing oil, lubricants, and/or cooling agents (e.g., gas streams generated by a compressor) though the media may also be used in other applications. Advantageously, the fiber webs, filter media, and/or filter elements described herein may significantly reduce or prevent fouling of the filter caused by oil or other liquids.
Battery separators, and lead-acid batteries comprising battery separators, are generally provided. In some embodiments, the battery separators described herein have one or more features that enhance their suitability for various applications (e.g., lead-acid battery applications). In one embodiment, a battery separator described herein comprises at least two phases. In some cases, each phase may have a one or more features that result in a battery separator having enhanced physical properties. For example, the dual-phase battery separator may exhibit reduced electrical and ionic resistance, enhanced acid filling capacity, reduced acid stratification, and enhanced thermal and oxidative stability compared to conventional battery separators.
H01M 50/489 - Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
16 - Paper, cardboard and goods made from these materials
17 - Rubber and plastic; packing and insulating materials
Goods & Services
Technical and industrial papers for use with air, fuel,
hydraulic, water, oil, fluid, dust, airborne particle and
exhaust filters, paper-based substrates used in diagnostic
test kits, paper-based substrates for battery separators,
pasting papers, which are sold in rolls, sheets, or
laminated structures and paper-based substrates for retainer
mats, which are sold in rolls, sheets, or laminated
structures; technical and industrial papers sold in rolls,
sheets or laminated structures; technical and industrial
papers of natural and/or synthetic fibers in rolls, sheets
or laminated or composite structures used for filtration. Glass fiber filtration media sold in rolls; glass fiber
materials for battery separator, glass fiber materials for
pasting papers, and glass fiber materials for retainer mats
sold in rolls and sheets; glass fibers for filtration and
battery separation; nonwovens comprised of synthetic fibers
for use with air, fuel, hydraulic, water, oil, fluid, dust,
airborne particle and exhaust filters; nonwoven substrates
comprised of synthetic fibers used in diagnostic test kits;
nonwovens comprised of synthetic fibers sold in rolls,
sheets or laminated structures; nonwovens comprised of
synthetic fibers in rolls, sheets or laminated or composite
structures used for filtration.
Non-woven fiber webs and articles (e.g., filter media) comprising non-woven fiber webs are generally described. In some embodiments, a non-woven fiber web described herein formed via certain non-wetlaid processes may exhibit enhanced physical properties. For example, a nonwoven fiber web may be subjected to a carding (e.g., cross-lapped carding) process. In some cases, the non-woven fiber webs described herein may be calendered to further enhance their physical properties.
Battery components are generally provided. In some embodiments, the battery components can be used as pasting paper and/or capacitance layers for batteries, such as lead acid batteries. The battery components described herein may comprise a plurality of fibers. The battery component may include, in some embodiments, a plurality of fibers and, optionally, one or more additives such as conductive carbon and/or activated carbon. In certain embodiments, the plurality of fibers include relatively coarse glass fibers (e.g., having an average diameter of greater than or equal to 2 microns), relatively fine glass fibers (e.g., having an average diameter of less than 2 microns), and/or fibrillated fibers. In some instances, such fibers may be present in amounts such that the battery component has a particular surface area, mean pore size, and/or dry tensile strength.
H01M 50/489 - Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
17 - Rubber and plastic; packing and insulating materials
Goods & Services
(1) Nonwoven filtration materials made of synthetic fibers for cabin air filtration composed of polymeric fibers for conversion into cabin air filters; nonwoven filtration materials made of synthetic fibers and adsorptive particles for cabin air filtration composed of polymeric fibers for conversion into cabin air filters.
30.
FILTER MEDIA COMPRISING FIBRILLATED FIBERS AND GLASS FIBERS
Filter media comprising non-woven fiber webs having one or more advantageous physical properties are generally described. In some embodiments, a filter media and/or non-woven fiber web described herein comprises a combination of fibers that results in enhanced physical properties. For example, the non-woven fiber web may comprise a combination of fiber types that is advantageous, such as a combination comprising fibrillated fibers, glass fibers, and/or binder fibers. In some cases, the filter media and/or non-woven fiber web comprising the combination of fibers may be formed into undulations (e.g., by a creping and/or microcreping process) to further enhance the physical properties of the filter media and/or non-woven fiber.
Filter media comprising non-woven fiber webs and having one or more advantageous structural properties are generally described. In some embodiments, a filter media and/or non-woven fiber web described herein has one or more properties that are both beneficial and easily obtainable by undulating the non-woven fiber web, such as by performing a creping procedure. This property may be characteristic of the procedure employed to form the undulations (e.g., creping and/or microcreping), or may be attainable via one or more methods of undulation.
Filter media comprising non-woven fiber webs having one or more advantageous physical properties are generally described. In some embodiments, a filter media and/or non-woven fiber web described herein comprises a combination of fibers that results in enhanced physical properties. For example, the non-woven fiber web may comprise a combination of fiber types that is advantageous, such as a combination comprising fibrillated fibers, glass fibers, and/or binder fibers. In some cases, the filter media and/or non-woven fiber web comprising the combination of fibers may be formed into undulations (e.g., by a creping and/or microcreping process) to further enhance the physical properties of the filter media and/or non-woven fiber.
Filter media comprising non-woven fiber webs and having one or more advantageous structural properties are generally described. In some embodiments, a filter media and/or non-woven fiber web described herein has one or more properties that are both beneficial and easily obtainable by undulating the non-woven fiber web, such as by performing a creping procedure. This property may be characteristic of the procedure employed to form the undulations (e.g., creping and/or microcreping), or may be attainable via one or more methods of undulation.
Battery separators comprising ribs are generally described. In some embodiments, the ribs have one or more features that enhance the performance of the battery separator.
Filter media comprising fluorinated water-repellent additives and/or water-repellent additives having minimal or no fluorine atoms are generally provided. Filter media disclosed herein may include fluorinated water-repellent additives but not water-repellent additives having minimal or no fluorine atoms, water-repellent additives having minimal or no fluorine atoms but not fluorinated water-repellent additives, or both fluorinated water-repellent additives and water-repellent additives having minimal or no fluorine atoms.
Filter media comprising fluorinated water-repellent additives and/or water-repellent additives having minimal or no fluorine atoms are generally provided. Filter media disclosed herein may include fluorinated water-repellent additives but not water-repellent additives having minimal or no fluorine atoms, water-repellent additives having minimal or no fluorine atoms but not fluorinated water-repellent additives, or both fluorinated water-repellent additives and water-repellent additives having minimal or no fluorine atoms.
Disclosed are battery separators comprising glass fibers and having a basis weight (gsm), a specific surface area (m2/g), a density (gsm/mm) and a mean pore size (μm), which satisfy the equation disclosed herein, provided that: the specific surface area is less than 1.5 m2/g, or the density is greater than 180 gsm/mm. Also disclosed are batteries comprising the battery separators, and processes for making the separators.
Filter media comprising water-repellent additives having minimal or no fluorine atoms are generally provided. In some embodiments, the water-repellent additives comprise one or more water-repellent functional groups. The water-repellent functional groups may comprise a carbon chain including three or more carbon atoms. In some embodiments, some or all of the water-repellent functional group(s) are bonded to a silicon atom and/or a metal atom. It is also possible for some or all of the water-repellent functional group(s) to form side chain(s) attached to a polymer backbone.
Filter media, such as electret-containing filtration media for filtering gas streams (e.g., air), are described herein. In some embodiments, the filter media may be designed to have desirable properties such as stable filtration efficiency over the lifetime of the filter media, increased normalized gamma, relatively low pressure drop (i.e. resistance), and/or relatively low basis weight. In certain embodiments, the filter media may be a composite of two or more types of fiber layers where each layer may be designed to enhance its function without substantially negatively impacting the performance of another layer of the media. For example, one layer of the media may be designed to have a relatively low basis weight and/or a relatively high air permeability, and another layer of the media may be designed to have stable filtration efficiency and/or a relatively high efficiency throughout the filter media's lifetime. The filter media described herein may be particularly well-suited for applications that involve filtering gas streams (e.g., face masks, cabin air filtration, vacuum filtration, room filtration, furnace filtration, respirator equipment, residential or industrial HVAC filtration, high-efficiency particulate arrestance (HEPA) filters, ultra-low particular air (ULPA) filters, medical equipment), though the media may also be used in other applications.
16 - Paper, cardboard and goods made from these materials
17 - Rubber and plastic; packing and insulating materials
Goods & Services
Technical and industrial papers for use with air, fuel,
hydraulic, water, oil, fluid, dust, airborne particle and
exhaust filters, paper-based substrates used in diagnostic
test kits, paper-based substrates for battery separators,
pasting papers, which are sold in rolls, sheets, or
laminated structures, and paper-based substrates for
retainer mats, which are sold in rolls, sheets, or laminated
structures; technical and industrial papers sold in rolls,
sheets or laminated structures; technical and industrial
papers of natural and/or synthetic fibers in rolls, sheets
or laminated or composite structures used for filtration. Glass fiber filtration media sold in rolls; glass fiber
materials for battery separator, glass fiber materials for
pasting papers, and glass fiber materials for retainer mats
sold in rolls and sheets; glass fibers for filtration and
battery separation; nonwovens comprised of synthetic fibers
for use with air, fuel, hydraulic, water, oil, fluid, dust,
airborne particle and exhaust filters; nonwoven substrates
comprised of synthetic fibers used in diagnostic test kits;
nonwovens comprised of synthetic fibers sold in rolls,
sheets or laminated structures; nonwovens comprised of
synthetic fibers in rolls, sheets or laminated or composite
structures used for filtration.
Filter media, such as electret-containing filtration media for filtering gas streams (e.g., air), are described herein. In some embodiments, the filter media may be designed to have desirable properties such as stable filtration efficiency over the lifetime of the filter media, increased normalized gamma, relatively low pressure drop (i.e. resistance), and/or relatively low basis weight. In certain embodiments, the filter media may be a composite of two or more types of fiber layers where each layer may be designed to enhance its function without substantially negatively impacting the performance of another layer of the media. For example, one layer of the media may be designed to have a relatively low basis weight and/or a relatively high air permeability, and another layer of the media may be designed to have stable filtration efficiency and/or a relatively high efficiency throughout the filter media's lifetime. The filter media described herein may be particularly well-suited for applications that involve filtering gas streams (e.g., face masks, cabin air filtration, vacuum filtration, room filtration, furnace filtration, respirator equipment, residential or industrial HVAC filtration, high-efficiency particulate arrestance (HEPA) filters, ultra-low particular air (ULPA) filters, medical equipment), though the media may also be used in other applications.
16 - Paper, cardboard and goods made from these materials
17 - Rubber and plastic; packing and insulating materials
Goods & Services
(1) Technical and industrial papers for use with air, fuel, hydraulic, water, oil, fluid, dust, airborne particle and exhaust filters, paper-based substrates used in diagnostic test kits, paper-based substrates for battery separators, pasting papers, which are sold in rolls, sheets, or laminated structures and paper-based substrates for retainer mats, which are sold in rolls, sheets, or laminated structures; technical and industrial papers sold in rolls, sheets or laminated structures; technical and industrial papers of natural and/or synthetic fibers in rolls, sheets or laminated or composite structures used for filtration.
(2) Glass fiber filtration media sold in rolls; glass fiber materials for battery separator, glass fiber materials for pasting papers, and glass fiber materials for retainer mats sold in rolls and sheets; glass fibers for filtration and battery separation; nonwovens comprised of synthetic fibers for use with air, fuel, hydraulic, water, oil, fluid, dust, airborne particle and exhaust filters; nonwoven substrates comprised of synthetic fibers used in diagnostic test kits; nonwovens comprised of synthetic fibers sold in rolls, sheets or laminated structures; nonwovens comprised of synthetic fibers in rolls, sheets or laminated or composite structures used for filtration.
Filter media comprising a pre-filter layer and related components, systems, and methods associated therewith are provided. In some embodiments, the pre-filter layer may be designed to impart desirable properties to the filter media, such as a high gamma and/or long service life, while having relatively minimal or no adverse effects on another property of the filter media that is important for a given application. For instance, a pre-filter layer may be used to improve the upstream removal of fine particulate matter, which may clog a downstream efficiency layer comprising submicron fibers and reduce filtration performance. The pre-filter layer may be configured to increase service life and/or increase the gamma of the filter media. Filter media, as described herein, may be particularly well-suited for applications that involve filtering air, though the media may also be used in other applications.
B01D 53/22 - Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by diffusion
B01D 46/62 - Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
B01D 39/16 - Other self-supporting filtering material of organic material, e.g. synthetic fibres
A41D 13/11 - Protective face masks, e.g. for surgical use, or for use in foul atmospheres
B01D 46/52 - Particle separators, e.g. dust precipitators, using filters embodying folded material
B01D 46/54 - Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
A62B 23/02 - Filters for breathing-protection purposes for respirators
22 - Rope, netting, tents, awnings, sails and sacks; padding and stuffing materials
Goods & Services
Nonwoven filtration materials made of synthetic fibers for cabin air filtration composed of polymeric fibers for conversion into cabin air filters; nonwoven filtration materials made of synthetic fibers and adsorptive particles for cabin air filtration composed of polymeric fibers for conversion into cabin air filters
Filter media, such as electret-containing filtration media for filtering gas streams (e.g., air), are described herein. In some embodiments, the filter media may be designed to have desirable properties such as stable filtration efficiency over the lifetime of the filter media, increased normalized gamma, relatively low pressure drop (i.e. resistance), and/or relatively low basis weight. In certain embodiments, the filter media may be a composite of two or more types of fiber layers where each layer may be designed to enhance its function without substantially negatively impacting the performance of another layer of the media. For example, one layer of the media may be designed to have a relatively low basis weight and/or a relatively high air permeability, and another layer of the media may be designed to have stable filtration efficiency and/or a relatively high efficiency throughout the filter media's lifetime. The filter media described herein may be particularly well-suited for applications that involve filtering gas streams (e.g., face masks, cabin air filtration, vacuum filtration, room filtration, furnace filtration, respirator equipment, residential or industrial HVAC filtration, high-efficiency particulate arrestance (HEPA) filters, ultra-low particular air (ULPA) filters, medical equipment), though the media may also be used in other applications.
B01D 39/16 - Other self-supporting filtering material of organic material, e.g. synthetic fibres
B03C 3/28 - Plant or installations without electricity supply, e.g. using electrets
B32B 5/26 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer another layer also being fibrous or filamentary
46.
FILTER MEDIA COMPRISING A POLYETHERSULFONE-BASED FINE FIBER LAYER
Filter media, including those suitable for hydraulic, fuel, HVAC, HEPA, and/or other applications, and related methods are provided. In some embodiments, a filter media described herein may include a layer (e.g., a fine fiber layer) comprising a plurality of fibers comprising polyamide 11. In some embodiments, a filter media comprises a layer (e.g., a fine fiber layer) comprising a plurality of electro spun fibers comprising a material having one or more advantageous properties. In an exemplary set of embodiments, the plurality of fibers comprise polyamide 11 (e.g., Nylon 11). In some embodiments, the polyamide 11 fibers are produced by an electro spinning process.
B01D 39/00 - Filtering material for liquid or gaseous fluids
B32B 5/02 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments
D04H 1/728 - Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by electro-spinning
Filter media comprising adsorptive particles are generally described. In some embodiments, the adsorptive particles are present in a relatively large amount, in a layer discrete from one or more other layers and/or fiber webs also present in the filter media, and/or in a layer that comprises a relatively low amount of fibers. In some embodiments, the filter media further comprises a non-woven fiber web comprising fibers with relatively small diameters.
B01D 53/04 - Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
B01D 46/00 - Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
Filter media comprising adsorptive particles are generally described. In some embodiments, the adsorptive particles are present in a relatively large amount, in a layer discrete from one or more other layers and/or fiber webs also present in the filter media, and/or in a layer that comprises a relatively low amount of fibers. In some embodiments, the filter media further comprises a non- woven fiber web comprising fibers with relatively small diameters.
B01D 53/04 - Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
B01D 53/02 - Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by adsorption, e.g. preparative gas chromatography
B01J 20/06 - Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group
B01J 20/08 - Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group comprising bauxite
52.
FILTER MEDIA WITH IRREGULAR STRUCTURE AND/OR REVERSIBLY STRETCHABLE LAYERS
Articles and methods relating to filter media are generally provided. In some embodiments, a filter media has an irregular surface structure. For instance, the filter media may comprise a plurality of peaks that are irregular in one or more ways. A ratio of a peak height standard deviation to an average peak height may be greater than or equal to 0.05, and/or a ratio of a peak spacing standard deviation to an average peak spacing may be greater than or equal to 0.08. In some embodiments, a filter media comprises a non- woven fiber web having a layer thickness of greater than 0.3 mm and/or a stiffness of less than or equal to 100 mg.
B01D 39/08 - Filter cloth, i.e. woven, knitted or interlaced material
B01D 39/16 - Other self-supporting filtering material of organic material, e.g. synthetic fibres
B01D 46/52 - Particle separators, e.g. dust precipitators, using filters embodying folded material
B32B 1/00 - Layered products essentially having a general shape other than plane
B32B 5/02 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments
B32B 7/035 - Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical propert; Layered products characterised by the interconnection of layers with respect to the orientation of features using arrangements of stretched films, e.g. of mono-axially stretched films arranged alternately
B32B 38/00 - Ancillary operations in connection with laminating processes
16 - Paper, cardboard and goods made from these materials
17 - Rubber and plastic; packing and insulating materials
Goods & Services
(1) Technical and industrial papers for use with air, fuel, hydraulic, water, oil, fluid, dust, airborne particle and exhaust filters, paper-based substrates used in diagnostic test kits, paper-based substrates for battery separators, pasting papers, which are sold in rolls, sheets, or laminated structures, and paper-based substrates for retainer mats, which are sold in rolls, sheets, or laminated structures; technical and industrial papers sold in rolls, sheets or laminated structures; technical and industrial papers of natural and/or synthetic fibers in rolls, sheets or laminated or composite structures used for filtration.
(2) Glass fiber filtration media sold in rolls; glass fiber materials for battery separator, glass fiber materials for pasting papers, and glass fiber materials for retainer mats sold in rolls and sheets; glass fibers for filtration and battery separation; nonwovens comprised of synthetic fibers for use with air, fuel, hydraulic, water, oil, fluid, dust, airborne particle and exhaust filters; nonwoven substrates comprised of synthetic fibers used in diagnostic test kits; nonwovens comprised of synthetic fibers sold in rolls, sheets or laminated structures; nonwovens comprised of synthetic fibers in rolls, sheets or laminated or composite structures used for filtration.
54.
FILTER MEDIA INCLUDING OUT-OF-PLANE SOLID ELEMENTS, METHODS OF FORMING THEM, AND USES THEREOF
B01D 39/02 - Loose filtering material, e.g. loose fibres
B01D 39/14 - Other self-supporting filtering material
B01D 39/16 - Other self-supporting filtering material of organic material, e.g. synthetic fibres
D04H 3/00 - Non woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
D04H 3/08 - Non woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
55.
FILTER MEDIA INCLUDING OUT-OF-PLANE SOLID ELEMENTS, METHODS OF FORMING THEM, AND USES THEREOF
16 - Paper, cardboard and goods made from these materials
17 - Rubber and plastic; packing and insulating materials
Goods & Services
technical and industrial papers made of natural or synthetic fibers for use in the further manufacture of air, fuel, hydraulic, water, oil, fluid, dust, and airborne particle and exhaust filters, paper-based substrates for use in the further manufacture of diagnostic test kits, battery separators, pasting papers and retainer mats, which papers are sold in rolls, sheets, or laminated structures, namely, layers bonded together using heat, adhesives, or pressure; technical and industrial papers sold in rolls, sheets, or laminated structures, namely, layers bonded together using heat, adhesives, or pressure; technical and industrial papers of natural or synthetic fibers sold in rolls, sheets or laminated or composite structures, namely, layers bonded together using heat, adhesives, or pressure used for filtration glass fiber filtration media sold in rolls; glass fiber separation media for battery separator, glass fiber separation media for pasting papers, and glass fiber separation media for retainer mats sold in rolls and sheets; glass fiber filtration media and separation media for filtration and battery separation
16 - Paper, cardboard and goods made from these materials
17 - Rubber and plastic; packing and insulating materials
Goods & Services
technical and industrial papers made of natural or synthetic fibers for use in the further manufacture of air, fuel, hydraulic, water, oil, fluid, dust, and airborne particle and exhaust filters, paper-based substrates for use in the further manufacture of diagnostic test kits, battery separators, pasting papers and retainer mats, which papers are sold in rolls, sheets, or laminated structures, namely, layers bonded together using heat, adhesives, or pressure; technical and industrial papers sold in rolls, sheets, or laminated structures, namely, layers bonded together using heat, adhesives, or pressure; technical and industrial papers of natural or synthetic fibers sold in rolls, sheets or laminated or composite structures, namely, layers bonded together using heat, adhesives, or pressure used for filtration glass fiber filtration media sold in rolls; glass fiber separation media for battery separator, glass fiber separation media for pasting papers, and glass fiber separation media for retainer mats sold in rolls and sheets; glass fiber filtration media and separation media for filtration and battery separation
Articles and methods involving filter media are generally provided. In certain embodiments, the filter media includes at least a first layer, a second layer, and an adhesive resin positioned between the first layer and the second layer. In some embodiments, the first layer may be a pre-filter layer or a support layer. The second layer may, for example, comprise fibers formed by a solution spinning process and/or may comprise fine fibers. In some embodiments, the adhesive resin may be present in a relatively low amount and/or may have a low glass transition temperature. The filter media as a whole may have one or more advantageous properties, including one or more of a high stiffness, a high bond strength between the first layer and the second layer, a high gamma, and/or a low increase in air resistance after being subjected to an IPA vapor discharge. The filter media may be, for example, a HEPA filter and/or an ULPA filter.
B01D 39/14 - Other self-supporting filtering material
B01D 46/62 - Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
B01D 39/16 - Other self-supporting filtering material of organic material, e.g. synthetic fibres
B01D 39/18 - Other self-supporting filtering material of organic material, e.g. synthetic fibres the material being cellulose or derivatives thereof
B01D 39/20 - Other self-supporting filtering material of inorganic material, e.g. asbestos paper or metallic filtering material of non-woven wires
B01D 46/00 - Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
Battery separators comprising embossments are generally provided. The embossments may take the form of indentations formed in a surface of the battery separator, such as indentations formed by an embossing process. The embossments may comprise intersections with a first edge and a second edge of the battery separator, which may be the same or different.
Filter media including a filtration layer comprising fibers (e.g., synthetic fibers) comprising a flame retardant and related components, systems, and methods associated herewith are provided. In some embodiments, a filtration layer may include a nonwoven web (e.g., wet-laid nonwoven web) comprising fibers including a certain flame retardant that has a relatively low concentration of or is substantially free of certain undesirable and/or toxic components (e.g., halogens). In certain embodiments, the nonwoven web may also comprise a blend of fibers. For instance, in some embodiments, the nonwoven web may also comprise a blend of coarse and fine diameter synthetic fibers that impart beneficial performance properties to the filtration layer. In some embodiments, the filtration layer may be designed to have a desirable flame retardancy (e.g., F1 rating, K1 rating) and performance properties without compromising certain mechanical properties (e.g., pleatability of the media) and/or environmental attributes (e.g., relatively low toxicity). Filter media described herein may be particularly well-suited for applications that involve filtering air, though the media may also be used in other applications.
Articles and methods involving filter media are generally provided. In certain embodiments, the filter media includes at least a first layer, a second layer, and an adhesive resin positioned between the first layer and the second layer. In some embodiments, the first layer may be a pre-filter layer or a support layer. The second layer may, for example, comprise fibers formed by a solution spinning process and/or may comprise fine fibers. In some embodiments, the adhesive resin may be present in a relatively low amount and/or may have a low glass transition temperature. The filter media as a whole may have one or more advantageous properties, including one or more of a high stiffness, a high bond strength between the first layer and the second layer, a high gamma, and/or a low increase in air resistance after being subjected to an IPA vapor discharge. The filter media may be, for example, a HEPA filter and/or an ULPA filter.
Filter media comprising a non-wetlaid backer are generally provided. In some embodiments, a filter media comprises a non-wetlaid fiber web and further comprises one or more further fiber webs. The further fiber web(s) may include an efficiency layer and/or a prefilter.
Filter media, such as electret-containing filtration media for filtering gas streams (e.g., air), are described herein. In some embodiments, the filter media may be designed to have desirable properties such as stable filtration efficiency over the lifetime of the filter media, increased normalized gamma, relatively low pressure drop (i.e. resistance), and/or relatively low basis weight. In certain embodiments, the filter media may be a composite of two or more types of fiber layers where each layer may be designed to enhance its function without substantially negatively impacting the performance of another layer of the media. For example, one layer of the media may be designed to have a relatively low basis weight and/or a relatively high air permeability, and another layer of the media may be designed to have stable filtration efficiency and/or a relatively high efficiency throughout the filter media's lifetime. The filter media described herein may be particularly well-suited for applications that involve filtering gas streams (e.g., face masks, cabin air filtration, vacuum filtration, room filtration, furnace filtration, respirator equipment, residential or industrial HVAC filtration, high-efficiency particulate arrestance (HEPA) filters, ultra-low particular air (ULPA) filters, medical equipment), though the media may also be used in other applications.
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.
B01D 39/16 - Other self-supporting filtering material of organic material, e.g. synthetic fibres
B32B 5/02 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments
B32B 5/26 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer another layer also being fibrous or filamentary
D04H 3/16 - Non woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion
Filter media having a gradient in a property and methods associated with such media are provided. In some embodiments, a filter media may have a gradient in mean pore size. The gradient in mean pore size may be across at least a portion of the thickness of the filter media. In some embodiments, the gradient can be represented by an exponential function. The exponential gradient in mean pore size may impart desirable properties to the filter media including enhanced filtration properties (e.g., relatively high dust holding capacity and efficiency), amongst other benefits. The filter media may be particularly well-suited for applications that involve filtering liquids (e.g., hydraulics, fuel, lube, water), though the media may also be used in other applications.
B01D 39/14 - Other self-supporting filtering material
B01D 29/00 - Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups ; Filtering elements therefor
B01D 39/16 - Other self-supporting filtering material of organic material, e.g. synthetic fibres
B01D 33/00 - Filters with filtering elements which move during the filtering operation
Filter media comprising nanofibers and related components, systems, and methods associated therewith are provided. In some embodiments, a filter media may comprise a first fiber web and a second fiber web designed to impart beneficial properties to the filter media. For instance, in some embodiments, the first fiber web may provide high particulate efficiency and the second fiber web may provide suitable capacity. In some embodiments, the first and second fiber webs may have certain properties (e.g., water contact angle, surface energy) that are similar or substantially the same. The similarities between the first and second fiber webs may serve to enhance the structural stability of the filter media under various conditions (e.g., high temperature, high pressure, steam sterilization) and/or permeability to certain fluids (e.g., water). Filter media, as described herein, may be particularly well-suited for applications that involve liquid filtration.
Filter media, filter elements, and methods for filtering an gas stream are described herein. In some embodiments, the filter media may comprise a fiber web comprising a plurality of fibers and having a particular oil repellency level. For instance, in certain embodiments, the surface chemistry of the fiber web may be tailored to impart a particular surface energy density that matches the surface energy density of the fluid (e.g., an oil, a lubricant, and/or a cooling agent) being removed from the gas stream. In some embodiments, the fiber web may be wrapped around a core. For example, the fiber web may be wrapped around the core such that it forms two or more layers around the core. In some cases, the fiber web may be perforated. In certain embodiments, an gas stream comprising a fluid (e.g., an oil, a lubricant, and/or a cooling agent) may be passed through the fiber web, filter media, and/or filter element such that at least a portion of the fluid coalesces on the fiber web. Fiber webs, filter media, and/or filter elements as described herein may be particularly well-suited for applications that involve filtering gas streams containing oil, lubricants, and/or cooling agents (e.g., gas streams generated by a compressor) though the media may also be used in other applications. Advantageously, the fiber webs, filter media, and/or filter elements described herein may significantly reduce or prevent fouling of the filter caused by oil or other liquids.
Filter media comprising one or more layers comprising nanofibers are generally described. In some embodiments, a filter media comprises a layer comprising nanofibers. The nanofibers may comprise an elastomer, a multiblock copolymer, and/or a multiblock copolymer that is an elastomer.
Articles and methods relating to filter media are generally provided. In some embodiments, a filter media has an irregular surface structure. For instance, the filter media may comprise a plurality of peaks that are irregular in one or more ways. A ratio of a peak height standard deviation to an average peak height may be greater than or equal to 0.05, and/or a ratio of a peak spacing standard deviation to an average peak spacing may be greater than or equal to 0.08. In some embodiments, a filter media comprises a non-woven fiber web having a layer thickness of greater than 0.3 mm and/or a stiffness of less than or equal to 100 mg.
B01D 53/22 - Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by diffusion
B01D 39/16 - Other self-supporting filtering material of organic material, e.g. synthetic fibres
B01D 39/08 - Filter cloth, i.e. woven, knitted or interlaced material
Battery separators and lead- acid batteries comprising battery separators are generally provided. The battery separators may have one or more features that enhances their suitability for use in lead-acid batteries. For example, the battery separators described herein may have one or more features that enhance their suitability for emerging flooded battery applications, such as extended flooded battery applications.
Articles and methods involving filter media are generally provided. In certain embodiments, the filter media includes at least a first layer, a second layer, and an adhesive resin positioned between the first layer and the second layer. In some embodiments, the first layer may be a pre-filter layer or a support layer. The second layer may, for example, comprise fibers formed by a solution spinning process and/or may comprise fine fibers. In some embodiments, the adhesive resin may be present in a relatively low amount and/or may have a low glass transition temperature. The filter media as a whole may have one or more advantageous properties, including one or more of a high stiffness, a high bond strength between the first layer and the second layer, a high gamma, and/or a low increase in air resistance after being subjected to an IPA vapor discharge. The filter media may be, for example, a HEPA filter and/or an ULPA filter.
Articles and methods relating to filter media are generally provided. In some embodiments, a filter media comprises a non-woven fiber web and a backer layer. The non-woven fiber web may comprise a plurality of continuous nanofibers, e.g., continuous nanofibers having an average diameter of less than or equal to 250 nm. The plurality of the nanofibers may comprise a plurality of nanoparticles at least partially embedded therein. In some embodiments, the plurality of nanoparticles makes up less than or equal to 15 wt% of the plurality of nanofibers. In some embodiments, a solidity of the non-woven fiber web is less than or equal to a solidity of the backer layer.
Filter media having a relatively small pore size and related components, systems, and methods associated therewith are provided. The filter media may include a fibrous efficiency layer, a fibrous support layer, and a third layer adjacent to the efficiency layer. The efficiency layer may impart a relatively homogeneous pore structure to the filter media without adding substantial bulk to the filter media. The support layer may promote the homogeneity of the pore structure. For example, the support layer may prevent and/or minimize defects in the relatively thin efficiency layer that may result from manufacturing and/or processing. The third layer may serve to impart beneficial filtration (e.g., efficiency, dust holding capacity) and/or non-filtration (e.g., layer protection) properties to the filter media without adversely affecting one or more properties of the filter media. Filter media, as described herein, may be particularly well-suited for applications that involve liquid filtration, amongst other applications.
Filter media having a relatively small pore size and related components, systems, and methods associated therewith are provided. The filter media may include a fibrous efficiency layer, a fibrous support layer, and a third layer adjacent to the efficiency layer. The efficiency layer may impart a relatively homogeneous pore structure to the filter media without adding substantial bulk to the filter media. The support layer may promote the homogeneity of the pore structure. For example, the support layer may prevent and/or minimize defects in the relatively thin efficiency layer that may result from manufacturing and/or processing. The third layer may serve to impart beneficial filtration (e.g., efficiency, dust holding capacity) and/or non-filtration (e.g., layer protection) properties to the filter media without adversely affecting one or more properties of the filter media. Filter media, as described herein, may be particularly wellsuited for applications that involve liquid filtration, amongst other applications.
Articles and methods relating to filter media are generally provided. In some embodiments, a filter media has an irregular surface structure. For instance, the filter media may comprise a plurality of peaks that are irregular in one or more ways. A ratio of a peak height standard deviation to an average peak height may be greater than or equal to 0.05, and/or a ratio of a peak spacing standard deviation to an average peak spacing may be greater than or equal to 0.08. In some embodiments, a filter media comprises a non- woven fiber web having a layer thickness of greater than 0.3 mm and/or a stiffness of less than or equal to 100 mg.
Articles and methods relating to filter media are generally provided. In some embodiments, a filter media has an irregular surface structure. For instance, the filter media may comprise a plurality of peaks that are irregular in one or more ways. A ratio of a peak height standard deviation to an average peak height may be greater than or equal to 0.05, and/or a ratio of a peak spacing standard deviation to an average peak spacing may be greater than or equal to 0.08. In some embodiments, a filter media comprises a non-woven fiber web having a layer thickness of greater than 0.3 mm and/or a stiffness of less than or equal to 100 mg.
B01D 53/22 - Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by diffusion
B01D 39/16 - Other self-supporting filtering material of organic material, e.g. synthetic fibres
Protective clothing materials and related methods and garments are provided. In some embodiments, a protective clothing material may comprise a fibrous layer that serves as a barrier to certain fluids (e.g., bodily fluids, water) and microbes. The impermeability of the fibrous layer may be due, at least in part, to the structural uniformity and/or relatively small pore size of the fibrous layer. In some embodiments, the fibrous layer may have a relatively high air permeability that imparts beneficial properties (e.g., relatively high air flow, breathability) to the protective clothing material without adversely affecting its protection rating. In certain embodiments, the protective clothing material may also comprise one or more coarse nonwoven webs that impart beneficial properties (e.g., splash resistance) to the protective clothing material. The protective clothing materials, described herein, may be particularly useful for a wide variety of applications, including the formation of AAMI level 4 protective garments.
D04H 1/559 - Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving the fibres being within layered webs
A41D 13/12 - Surgeons' or patients' gowns or dresses
D04H 1/4374 - Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece using different kinds of webs, e.g. by layering webs
A41H 43/04 - Joining garment parts or blanks by gluing or welding
D04H 1/56 - Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving in association with fibre formation, e.g. immediately following extrusion of staple fibres
B32B 5/26 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer another layer also being fibrous or filamentary
B32B 5/02 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments
B32B 7/02 - Physical, chemical or physicochemical properties
B32B 7/12 - Interconnection of layers using interposed adhesives or interposed materials with bonding properties
B32B 37/12 - Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
B32B 37/14 - Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
B32B 37/18 - Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating involving the assembly of discrete sheets or panels only
B32B 38/00 - Ancillary operations in connection with laminating processes
Filter media comprising a non-woven web including one or more binder components are provided. In some embodiments, the non-woven web comprises fibers and one or more binder components (e.g., monocomponent binder fibers, binder particles). The binder component(s) may impart strength and/or durability to the nonwoven web without adversely affecting one or more filtration properties (e.g., air permeability, efficiency, dust holding capacity). In such cases, the non-woven web may function as both a filtration and support layer. For instance, the non-woven web may trap particulate matter and allow the filter media to be pleated and/or utilized in a filter element without the need for additional support structures. Filter media described herein may be particularly well-suited for applications such as fuel filtration, hydraulic filtration, lube filtration, gas turbine filtration, air filtration, and water filtration, though the media may also be used in other applications.
D04H 1/587 - Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives characterised by the bonding agents used
D04H 1/60 - Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in dry state, e.g. thermo-activatable agents in solid or molten state, and heat being applied subsequently
Filter media comprising a pre-filter layer and related components, systems, and methods associated therewith are provided. In some embodiments, the pre-filter layer may be designed to impart desirable properties to the filter media, such as a high gamma and/or long service life, while having relatively minimal or no adverse effects on another property of the filter media that is important for a given application. For instance, a pre-filter layer may be used to improve the upstream removal of fine particulate matter, which may clog a downstream efficiency layer comprising submicron fibers and reduce filtration performance. The pre-filter layer may be configured to increase service life and/or increase the gamma of the filter media. Filter media, as described herein, may be particularly well-suited for applications that involve filtering air, though the media may also be used in other applications.
B01D 53/22 - Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by diffusion
B01D 46/00 - Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
B01D 39/16 - Other self-supporting filtering material of organic material, e.g. synthetic fibres
A41D 13/11 - Protective face masks, e.g. for surgical use, or for use in foul atmospheres
B01D 46/52 - Particle separators, e.g. dust precipitators, using filters embodying folded material
B01D 46/54 - Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
A62B 23/02 - Filters for breathing-protection purposes for respirators
Surface modified filter media, including surface modified filter media having enhanced performance characteristics, are provided. In some embodiments, a filter media may comprise two or more layers designed to enhance fluid separation efficiency. One or more of the layers may have at least a portion of a surface that is modified to alter and/or enhance the wettability of the surface with respect to a particular fluid. In certain embodiments involving a filter media including more than one surface modified layer, at least one surface modified layer may have a greater air permeability and/or mean flow pore size than that of another surface modified layer. Such a configuration of layers may result in the media having enhanced fluid separation properties compared to filter media that do not include such modified layers or configuration of layers, all other factors being equal. The filter media may be well-suited for a variety of applications, including filtering fuel, air, and lube oil.
Fiber webs which are used in filter media are described herein. In some embodiments, the fiber webs include fibrillated fibers and optionally non-fibrillated fibers, amongst other optional components (e.g., binder resin). In some embodiments, the fiber webs include limited amounts of, or no, glass fiber. The respective characteristics and amounts of the fibrillated fibers are selected to impart desirable properties including mechanical properties and filtration properties (e.g., dust holding capacity and efficiency), amongst other benefits.
Articles and methods involving pasting papers and/or capacitance layers are generally provided. The pasting paper may comprise a capacitance layer, and/or a stand-alone capacitance layer may be provided. In some embodiments, a pasting paper may comprise a plurality of cellulose fibers, a plurality of multicomponent fibers, and a plurality of glass fibers. In some embodiments, a pasting paper may comprise a plurality of conductive species, a plurality of capacitive species, and/or a plurality of inorganic particles. In some embodiments, a pasting paper may be disposed on a battery paste, such as a battery paste for use in a lead- acid battery. In some cases, forming a battery plate may comprise disposing a pasting paper on a battery paste. In some cases, a lead- acid battery may be assembled by assembling a first battery plate comprising a pasting paper with a separator and a second battery plate.
Filter media comprising a filtration layer comprising synthetic fibers (e.g., pleatable backer layer) and related components, systems, and methods associated herewith are provided. In some embodiments, the filtration layer comprising synthetic fibers may be a non-woven web comprising a blend of coarse and fine diameter fibers. The filtration layer comprising synthetic fibers may be designed to have desirable performance properties without compromising certain mechanical properties, such as the pleatability of the media. In some embodiments, a filter media, described herein, may comprise the filtration layer comprising synthetic fibers and an efficiency layer. Filter media, as described herein, may be particularly well-suited for applications that involve filtering air, though the media may also be used in other applications.
Fiber webs that may be used as filter media are provided. In some embodiments, the filter media may include multiple layers. Each layer may be designed to have separate functions in the filter media. For example, a first layer may be provided for improving dust holding capacity, a second layer for improving efficiency, and a third layer for providing support and strength to the media. By designing the layers to have separate functions, each layer may be optimized to enhance its function without negatively impacting the performance of another layer of the media.
Articles and methods involving pasting papers are generally provided. In certain embodiments, a pasting paper may comprise a plurality of cellulose fibers, a plurality of multicomponent fibers, and a plurality of glass fibers. In some embodiments, the average fiber diameter of each plurality of fibers is greater than or equal to 1 micron. In some embodiments, a pasting paper may have a thickness of less than 0.2 mm, an air permeability of less than or equal to 300 CFM, a 1.28 spg sulfuric acid wicking height of greater than 3 cm, and/or may be configured to have a dry tensile strength in a machine direction of greater than or equal to 1 lb/in after storage in 1.28 spg sulfuric acid at 75C for 168 hours. In some embodiments, a pasting paper may be disposed on a battery paste, such as a battery paste for use in a lead-acid battery.
Articles and methods involving pasting papers are generally provided. In certain embodiments, a pasting paper may comprise a plurality of cellulose fibers, a plurality of multicomponent fibers, and a plurality of glass fibers. In some embodiments, the average fiber diameter of each plurality of fibers is greater than or equal to 1 micron. In some embodiments, a pasting paper may have a thickness of less than 0.2 mm, an air permeability of less than or equal to 300 CFM, a 1.28 spg sulfuric acid wicking height of greater than 3 cm, and/or may be configured to have a dry tensile strength in a machine direction of greater than or equal to 1 lb/in after storage in 1.28 spg sulfuric acid at 75° C. for 168 hours. In some embodiments, a pasting paper may be disposed on a battery paste, such as a battery paste for use in a lead-acid battery. In certain cases, forming a battery plate may comprise disposing a pasting paper on a battery paste. In certain cases, a lead-acid battery may be assembled by assembling a first battery plate comprising a pasting paper with a separator and a second battery plate.
2/g), a density (gsm/mm) and a mean pore size (μm), which satisfy the equation disclosed herein. Also disclosed are batteries comprising the battery separators, and processes for making the separators.
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.
B01D 39/16 - Other self-supporting filtering material of organic material, e.g. synthetic fibres
B32B 5/02 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments
B32B 5/26 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer another layer also being fibrous or filamentary
D04H 3/16 - Non woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion
B01D 29/56 - Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups ; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection
Battery components are generally provided. In some embodiments, the battery components can be used as pasting paper and/or capacitance layers for batteries, such as lead acid batteries. The battery components described herein may comprise a plurality of fibers. The battery component may include, in some embodiments, a plurality of fibers and, optionally, one or more additives such as conductive carbon and/or activated carbon. In certain embodiments, the plurality of fibers include relatively coarse glass fibers (e.g., having an average diameter of greater than or equal to 2 microns), relatively fine glass fibers (e.g., having an average diameter of less than 2 microns), and/or fibrillated fibers. In some instances, such fibers may be present in amounts such that the battery component has a particular surface area, mean pore size, and/or dry tensile strength.
Protective clothing materials and related methods and garments are provided. In some embodiments, a protective clothing material may comprise a fibrous layer that serves as a barrier to certain fluids (e.g., bodily fluids, water) and microbes. The impermeability of the fibrous layer may be due, at least in part, to the structural uniformity and/or relatively small pore size of the fibrous layer. In some embodiments, the fibrous layer may have a relatively high air permeability that imparts beneficial properties (e.g., relatively high air flow, breathability) to the protective clothing material without adversely affecting its protection rating. In certain embodiments, the protective clothing material may also comprise one or more coarse nonwoven webs that impart beneficial properties (e.g., splash resistance) to the protective clothing material. The protective clothing materials, described herein, may be particularly useful for a wide variety of applications, including the formation of AAMI level 4 protective garments.
A41D 13/12 - Surgeons' or patients' gowns or dresses
B32B 5/26 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer another layer also being fibrous or filamentary
B32B 7/12 - Interconnection of layers using interposed adhesives or interposed materials with bonding properties
B32B 37/18 - Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating involving the assembly of discrete sheets or panels only
B32B 38/00 - Ancillary operations in connection with laminating processes
B32B 37/14 - Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
B32B 37/12 - Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
B32B 7/02 - Physical, chemical or physicochemical properties
A41D 31/00 - Materials specially adapted for outerwear
A41H 43/04 - Joining garment parts or blanks by gluing or welding
D04H 1/56 - Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving in association with fibre formation, e.g. immediately following extrusion of staple fibres
B32B 5/02 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments
Protective clothing materials and related methods and garments are provided. In some embodiments, a protective clothing material may comprise a fibrous layer that serves as a barrier to certain fluids (e.g., bodily fluids, water) and microbes. The impermeability of the fibrous layer may be due, at least in part, to the structural uniformity and/or relatively small pore size of the fibrous layer. In some embodiments, the fibrous layer may have a relatively high air permeability that imparts beneficial properties (e.g., relatively high air flow, breathability) to the protective clothing material without adversely affecting its protection rating. In certain embodiments, the protective clothing material may also comprise one or more coarse nonwoven webs that impart beneficial properties (e.g., splash resistance) to the protective clothing material. The protective clothing materials, described herein, may be particularly useful for a wide variety of applications, including the formation of AAMI level 4 protective garments.
B32B 5/02 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments
Nonwoven filter media composed of synthetic fibers for use
in filters for liquid filtration, namely, for use in pleated
cartridge or disc filter elements in liquid filtration
applications.
Filter media, as well as related components, systems, and methods, are described herein. In some embodiments, the filter media comprises one or more layers including, for example, a pre-filter layer and a main filter layer. The pre-filter layer may comprise a non-woven web (e.g., a wet-laid non-woven web). In some instances, the non-woven web comprises two or more phases. Each phase of the pre-filter layer may be characterized by a surface average fiber diameter (SAFD), and the SAFD may vary across at least a portion of the thickness of the pre-filter layer. The filter media may have improved dust-holding capacities for dust particles having a wide range of particle sizes, and/or improved mechanical strength (e.g., stiffness).
Articles and methods involving filter media are generally provided. In certain embodiments, the filter media includes at least a first layer, a second layer, and an adhesive resin positioned between the first layer and the second layer. In some embodiments, the first layer may be a pre-filter layer or a support layer. The second layer may, for example, comprise fibers formed by a solution spinning process and/or may comprise fine fibers. In some embodiments, the adhesive resin may be present in a relatively low amount and/or may have a low glass transition temperature. The filter media as a whole may have one or more advantageous properties, including one or more of a high stiffness, a high bond strength between the first layer and the second layer, a high gamma, and/or a low increase in air resistance after being subjected to an IPA vapor discharge. The filter media may be, for example, a HEPA filter and/or an ULPA filter.
Filter media including a waved filtration layer are described herein. The filtration layer may be held in a waved configuration by a support layer. In some cases, the filtration layer may have a combination of characteristics (e.g., mean flow pore size, basis weight, amongst others) that can lead to enhanced filtration performance (e.g., reduced air permeability decrease), in particular, in high humidity environments. The filter media may be used to form a variety of filter elements for use in various applications. In some embodiments, at least a surface of the filtration layer is hydrophilic.
B01D 29/07 - Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups ; Filtering elements therefor with flat filtering elements supported with corrugated, folded or wound filtering sheets
B01D 29/56 - Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups ; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection
B01D 39/14 - Other self-supporting filtering material
B01D 39/16 - Other self-supporting filtering material of organic material, e.g. synthetic fibres
B01D 46/10 - Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
B01D 46/52 - Particle separators, e.g. dust precipitators, using filters embodying folded material
