Filter media may be bonded to a filter housing during filtration processes. However, bonding between the filter media and filter housing sufficient to prevent delamination during filtration processes may be challenging as some filter media may be challenging to adhere sufficiently well to the filter housing. Furthermore, for use in consumer water applications, it may be desirable for filter media may undergo sterilization processes (e.g., using an autoclave) that expose the filter media to relatively high temperatures and pressures, which may decrease the adhesion strength between the filter media and the filter housing. Accordingly, there is a need for strategies for bonding filter media to filter housings that do not compromise the performance of the filter media and/or that can undergo sterilization processes without unacceptably compromising the structural integrity of the bond between the filter media and the filter housing.
Filter media may be bonded to a filter housing during filtration processes. However, bonding between the filter media and filter housing sufficient to prevent delamination during filtration processes may be challenging as some filter media may be challenging to adhere sufficiently well to the filter housing. Furthermore, for use in consumer water applications, it may be desirable for filter media may undergo sterilization processes (e.g., using an autoclave) that expose the filter media to relatively high temperatures and pressures, which may decrease the adhesion strength between the filter media and the filter housing. Accordingly, there is a need for strategies for bonding filter media to filter housings that do not compromise the performance of the filter media and/or that can undergo sterilization processes without unacceptably compromising the structural integrity of the bond between the filter media and the filter housing.
B01D 39/20 - Autres substances filtrantes autoportantes en substance inorganique, p. ex. papier d'amiante ou substance filtrante métallique faite de fils métalliques non-tissés
B32B 5/26 - Produits stratifiés caractérisés par l'hétérogénéité ou la structure physique d'une des couches caractérisés par la présence de plusieurs couches qui comportent des fibres, filaments, grains ou poudre, ou qui sont sous forme de mousse ou essentiellement poreuses une des couches étant fibreuse ou filamenteuse un autre couche également étant fibreuse ou filamenteuse
Filter media may be bonded to a filter housing during filtration processes. However, bonding between the filter media and filter housing sufficient to prevent delamination during filtration processes may be challenging as some filter media may be challenging to adhere sufficiently well to the filter housing. Furthermore, for use in consumer water applications, it may be desirable for filter media may undergo sterilization processes (e.g., using an autoclave) that expose the filter media to relatively high temperatures and pressures, which may decrease the adhesion strength between the filter media and the filter housing. Accordingly, there is a need for strategies for bonding filter media to filter housings that do not compromise the performance of the filter media and/or that can undergo sterilization processes without unacceptably compromising the structural integrity of the bond between the filter media and the filter housing.
B01D 29/00 - Filtres à éléments filtrants stationnaires pendant la filtration, p. ex. filtres à aspiration ou à pression, non couverts par les groupes Leurs éléments filtrants
B01D 39/16 - Autres substances filtrantes autoportantes en substance organique, p. ex. fibres synthétiques
4.
FILTER MEDIA COMPRISING WATER-REPELLENT ADDITIVES AND/OR FIBRILLATED FIBERS
Filter media comprising water-repellent additives and/or fibrillated fibers are generally provided. In some embodiments, the filter media comprises fibrillated fibers, such as lyocell fibers. In some embodiments, the filter media comprise water-repellent additives, such as fluorinated water-repellent additives and/or water-repellent additives having minimal or no fluorine atoms. 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.
B01D 39/20 - Autres substances filtrantes autoportantes en substance inorganique, p. ex. papier d'amiante ou substance filtrante métallique faite de fils métalliques non-tissés
B32B 5/02 - Produits stratifiés caractérisés par l'hétérogénéité ou la structure physique d'une des couches caractérisés par les caractéristiques de structure d'une couche comprenant des fibres ou des filaments
5.
FILTER MEDIA COMPRISING WATER-REPELLENT ADDITIVES AND/OR FIBRILLATED FIBERS
Filter media comprising water-repellent additives and/or fibrillated fibers are generally provided. In some embodiments, the filter media comprises fibrillated fibers, such as lyocell fibers. In some embodiments, the filter media comprise water-repellent additives, such as fluorinated water-repellent additives and/or water-repellent additives having minimal or no fluorine atoms. 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.
B01D 39/20 - Autres substances filtrantes autoportantes en substance inorganique, p. ex. papier d'amiante ou substance filtrante métallique faite de fils métalliques non-tissés
B01D 39/16 - Autres substances filtrantes autoportantes en substance organique, p. ex. fibres synthétiques
6.
FILTER MEDIA INCLUDING OUT-OF-PLANE SOLID ELEMENTS, METHODS OF FORMING THEM, AND USES THEREOF
B01D 39/04 - Substance organique, p. ex. cellulose, coton
B01D 39/18 - Autres substances filtrantes autoportantes en substance organique, p. ex. fibres synthétiques la substance étant la cellulose ou ses dérivés
7.
MULTILAYERED MEDIA WITH IRREGULAR STRUCTURE, POLYMERIC FILMS, AND/OR REVERSIBLY STRETCHABLE LAYERS
Articles and methods related to multilayered media are generally provided. Some embodiments are generally related to filter media. Some embodiments relate to multilayered media comprising an irregular structure. The irregular structure may be present on an external surface of the multilayered media, in the interior of the multilayered media, and/or throughout the multilayered media. Some aspects are generally related to multilayered media that are reversibly stretchable and/or comprising a polymeric film.
B32B 27/06 - Produits stratifiés composés essentiellement de résine synthétique comme seul composant ou composant principal d'une couche adjacente à une autre couche d'une substance spécifique
B32B 27/28 - Produits stratifiés composés essentiellement de résine synthétique comprenant des copolymères de résines synthétiques non complètement couverts par les sous-groupes suivants
C08L 77/00 - Compositions contenant des polyamides obtenus par des réactions créant une liaison amide carboxylique dans la chaîne principaleCompositions contenant des dérivés de tels polymères
B01D 29/07 - Filtres à éléments filtrants stationnaires pendant la filtration, p. ex. filtres à aspiration ou à pression, non couverts par les groupes Leurs éléments filtrants avec des éléments filtrants plats avec des supports à feuilles filtrantes ondulées, pliées ou enroulées
B01D 39/16 - Autres substances filtrantes autoportantes en substance organique, p. ex. fibres synthétiques
B01D 46/52 - Séparateurs de particules utilisant des filtres comportant un matériau plié, p. ex. appareils de précipitation de poussières
8.
MULTILAYERED MEDIA WITH IRREGULAR STRUCTURE AND/OR REVERSIBLY STRETCHABLE LAYERS
Articles and methods related to multilayered media are generally provided. Some embodiments are generally related to filter media. Some embodiments relate to multilayered media comprising an irregular structure. The irregular structure may be present on an external surface of the multilayered media, in the interior of the multilayered media, and/or throughout the multilayered media. Some aspects are generally related to multilayered media that are reversibly stretchable and/or comprising a polymeric film.
B01D 39/16 - Autres substances filtrantes autoportantes en substance organique, p. ex. fibres synthétiques
B01D 29/01 - Filtres à éléments filtrants stationnaires pendant la filtration, p. ex. filtres à aspiration ou à pression, non couverts par les groupes Leurs éléments filtrants avec des éléments filtrants plats
B01D 46/52 - Séparateurs de particules utilisant des filtres comportant un matériau plié, p. ex. appareils de précipitation de poussières
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.
B01D 39/20 - Autres substances filtrantes autoportantes en substance inorganique, p. ex. papier d'amiante ou substance filtrante métallique faite de fils métalliques non-tissés
Filter media are generally described. In some embodiments, a filter media has one or more properties that enhance its suitability for use in coalescer filters. For instance, the filter media may have a particularly low pressure drop and/or may have a particularly high efficiency. In some instances, such properties may be obtained without the inclusion of fluorinated materials, government-regulated substances, and/or toxic substances (e.g., PFAS) in the filter media or with the inclusion of no more than de minimis amounts of such substances.
B01D 39/20 - Autres substances filtrantes autoportantes en substance inorganique, p. ex. papier d'amiante ou substance filtrante métallique faite de fils métalliques non-tissés
B01D 39/14 - Autres substances filtrantes autoportantes
B01D 35/02 - Filtres adaptés à des endroits particuliers, p. ex. conduites, pompes, robinets
Filter media are generally described. In some embodiments, a filter media has one or more properties that enhance its suitability for use in coalescer filters. For instance, the filter media may have a particularly low pressure drop and/or may have a particularly high efficiency. In some instances, such properties may be obtained without the inclusion of fluorinated materials, government-regulated substances, and/or toxic substances (e.g., PFAS) in the filter media or with the inclusion of no more than de minimis amounts of such substances.
B01D 39/20 - Autres substances filtrantes autoportantes en substance inorganique, p. ex. papier d'amiante ou substance filtrante métallique faite de fils métalliques non-tissés
B01D 46/00 - Filtres ou procédés spécialement modifiés pour la séparation de particules dispersées dans des gaz ou des vapeurs
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 - Filtres ou procédés spécialement modifiés pour la séparation de particules dispersées dans des gaz ou des vapeurs avec plusieurs éléments filtrants, caractérisés par leur disposition relative montés en série
A41D 13/11 - Masques de protection du visage, p. ex. pour utilisation chirurgicale ou pour utilisation en atmosphère polluée
A62B 23/02 - Filtres en vue de la protection des voies respiratoires pour appareils respiratoires
B01D 39/16 - Autres substances filtrantes autoportantes en substance organique, p. ex. fibres synthétiques
B01D 46/52 - Séparateurs de particules utilisant des filtres comportant un matériau plié, p. ex. appareils de précipitation de poussières
B01D 46/54 - Séparateurs de particules utilisant des feuilles ou diaphragmes filtrants à structure ultra-fine, p. ex. appareils de précipitation de poussières
Articles and methods related to the use of fiber webs comprising glass fibers in electrodes of batteries such as lead acid batteries are generally described. An electrode media provided herein may comprise a fiber web comprising glass fibers of different types. Electrode media provided herein may be configured to be pasted in order to produce an electrode or battery plate. In some embodiments, an article comprising a lug attached to an electrode media is provided. The electrode media described herein may be associated with good electrical, mechanical, and/or thermal performance properties that contribute to their utility in lead acid batteries.
D04H 1/54 - Non-tissés formés uniquement ou principalement de fibres coupées ou autres fibres similaires relativement courtes à partir de voiles ou couches composés de fibres ne possédant pas des propriétés cohésives réelles ou potentielles par soudage des fibres ensembles, p. ex. par fusion partielle ou dissolution
H01M 4/02 - Électrodes composées d'un ou comprenant un matériau actif
H01M 4/14 - Électrodes pour accumulateurs au plomb
H01M 4/20 - Procédés de fabrication d'électrodes empattées
H01M 50/536 - Connexions d’électrodes dans un boîtier de batterie caractérisées par le procédé de fixation des conducteurs aux électrodes, p. ex. soudage
15.
METHODS OF CALENDARING AND/OR LAMINATING FIBER WEBS
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.
B32B 37/10 - Procédés ou dispositifs pour la stratification, p. ex. par polymérisation ou par liaison à l'aide d'ultrasons caractérisés par la technique de pressage, p. ex. faisant usage de l'action directe du vide ou d'un fluide sous pression
B01D 39/16 - Autres substances filtrantes autoportantes en substance organique, p. ex. fibres synthétiques
B32B 5/26 - Produits stratifiés caractérisés par l'hétérogénéité ou la structure physique d'une des couches caractérisés par la présence de plusieurs couches qui comportent des fibres, filaments, grains ou poudre, ou qui sont sous forme de mousse ou essentiellement poreuses une des couches étant fibreuse ou filamenteuse un autre couche également étant fibreuse ou filamenteuse
B32B 37/06 - Procédés ou dispositifs pour la stratification, p. ex. par polymérisation ou par liaison à l'aide d'ultrasons caractérisés par le procédé de chauffage
Filter media comprising a waved filtration layer having a gradient in a property and associated methods are provided. The waved filtration layer may include fibers that form one or more fiber webs. In some embodiments, the diameter of the fibers may vary across at least a portion of the thickness of the waved filtration layer to produce a gradient in fiber diameter. The gradient may be designed to impart beneficial properties to the filter media, such as low pressure drop and long lifetime. In some embodiments, the gradient may be characterized by mathematical equations that describe the change in fiber diameter across at least a portion of the thickness of the waved filtration layer. The filter media, described herein, may be particularly well-suited for applications that involve filtering liquids, though the media may also be used in other applications.
B01D 39/16 - Autres substances filtrantes autoportantes en substance organique, p. ex. fibres synthétiques
B01D 39/18 - Autres substances filtrantes autoportantes en substance organique, p. ex. fibres synthétiques la substance étant la cellulose ou ses dérivés
17 - Produits en caoutchouc ou en matières plastiques; matières à calfeutrer et à isoler
Produits et services
Glass fiber filtration media for air and liquid sold in
rolls; synthetic fiber filtration media for air and liquid
sold in rolls; glass and synthetic fiber filtration media
for air and liquid sold in rolls.
19.
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 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.
Fine glass fibers, as well as fiber webs, separators, and pasting papers comprising the fine glass fibers, are generally described. In some embodiments, the fine glass fibers have a relatively high BET specific surface area (e.g., greater than or equal to 1.6 m2/g) while maintaining a relatively low aspect ratio (e.g., less than or equal to 80).
Fine glass fibers, as well as fiber webs, separators, and pasting papers comprising the fine glass fibers, are generally described. In some embodiments, the fine glass fibers have a relatively high BET specific surface area (e.g., greater than or equal to 1.6 m2/g) while maintaining a relatively low aspect ratio (e.g., less than or equal to 80).
Filter media comprising surface-treated fiber webs having one or more advantageous physical properties are generally described. Certain improvements in the surface-treated fiber webs described herein may be realized in filter media comprising adsorbent particles. The improvements herein are, in some embodiments, related to favorable distributions of cavities in surface-treated fiber webs, such as those used in backers of the filter media.
B01D 46/00 - Filtres ou procédés spécialement modifiés pour la séparation de particules dispersées dans des gaz ou des vapeurs
B01D 39/16 - Autres substances filtrantes autoportantes en substance organique, p. ex. fibres synthétiques
B01D 39/20 - Autres substances filtrantes autoportantes en substance inorganique, p. ex. papier d'amiante ou substance filtrante métallique faite de fils métalliques non-tissés
Filter media comprising surface-treated fiber webs having one or more advantageous physical properties are generally described. Certain improvements in the surface-treated fiber webs described herein may be realized in filter media comprising adsorbent particles. The improvements herein are, in some embodiments, related to favorable distributions of cavities in surface-treated fiber webs, such as those used in backers of the filter media.
Filter media comprising surface-treated fiber webs having one or more advantageous physical properties are generally described. Certain improvements in the surface-treated fiber webs described herein may be realized in filter media comprising nanofiber layers. The improvements herein are, in some embodiments, related to favorable distributions of cavities in surface-treated fiber webs, such as those used in backers of the filter media.
B01D 39/16 - Autres substances filtrantes autoportantes en substance organique, p. ex. fibres synthétiques
B01D 39/18 - Autres substances filtrantes autoportantes en substance organique, p. ex. fibres synthétiques la substance étant la cellulose ou ses dérivés
B01D 39/14 - Autres substances filtrantes autoportantes
B01D 24/02 - Filtres à substance filtrante non agglomérée, c.-à-d. à substance filtrante sans aucun liant entre les particules ou les fibres individuelles qui la composent avec le lit filtrant stationnaire pendant la filtration
Filter media comprising surface-treated fiber webs having one or more advantageous physical properties are generally described. Certain improvements in the surface-treated fiber webs described herein may be realized in filter media comprising nanofiber layers. The improvements herein are, in some embodiments, related to favorable distributions of cavities in surface-treated fiber webs, such as those used in backers of the filter media.
B01D 39/16 - Autres substances filtrantes autoportantes en substance organique, p. ex. fibres synthétiques
B01D 39/20 - Autres substances filtrantes autoportantes en substance inorganique, p. ex. papier d'amiante ou substance filtrante métallique faite de fils métalliques non-tissés
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 - Séparation de gaz ou de vapeursRécupération de vapeurs de solvants volatils dans les gazÉpuration chimique ou biologique des gaz résiduaires, p. ex. gaz d'échappement des moteurs à combustion, fumées, vapeurs, gaz de combustion ou aérosols par diffusion
A41D 13/11 - Masques de protection du visage, p. ex. pour utilisation chirurgicale ou pour utilisation en atmosphère polluée
B01D 39/16 - Autres substances filtrantes autoportantes en substance organique, p. ex. fibres synthétiques
B01D 46/52 - Séparateurs de particules utilisant des filtres comportant un matériau plié, p. ex. appareils de précipitation de poussières
B01D 46/54 - Séparateurs de particules utilisant des feuilles ou diaphragmes filtrants à structure ultra-fine, p. ex. appareils de précipitation de poussières
B01D 46/62 - Filtres ou procédés spécialement modifiés pour la séparation de particules dispersées dans des gaz ou des vapeurs avec plusieurs éléments filtrants, caractérisés par leur disposition relative montés en série
A62B 23/02 - Filtres en vue de la protection des voies respiratoires pour appareils respiratoires
17 - Produits en caoutchouc ou en matières plastiques; matières à calfeutrer et à isoler
Produits et services
(1) Glass fiber filtration media for air and liquid sold in rolls; synthetic fiber filtration media for air and liquid sold in rolls; glass and synthetic fiber filtration media for air and liquid sold in rolls.
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 - Autres substances filtrantes autoportantes
B01D 39/16 - Autres substances filtrantes autoportantes en substance organique, p. ex. fibres synthétiques
B01D 39/18 - Autres substances filtrantes autoportantes en substance organique, p. ex. fibres synthétiques la substance étant la cellulose ou ses dérivés
B01D 39/20 - Autres substances filtrantes autoportantes en substance inorganique, p. ex. papier d'amiante ou substance filtrante métallique faite de fils métalliques non-tissés
B01D 46/00 - Filtres ou procédés spécialement modifiés pour la séparation de particules dispersées dans des gaz ou des vapeurs
B01D 46/62 - Filtres ou procédés spécialement modifiés pour la séparation de particules dispersées dans des gaz ou des vapeurs avec plusieurs éléments filtrants, caractérisés par leur disposition relative montés en série
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 high performance are generally described. For instance, in some embodiments, a non-woven fiber web described herein has a relatively high value of gamma and/or a relatively high ratio of dust holding capacity to basis weight. As another example, in some embodiments, a non-woven fiber web described herein is capable of being loaded with dust relatively uniformly throughout its depth. This latter property may assist with increasing the gamma and/or the ratio of dust holding capacity to basis weight.
Filter media comprising non-woven fiber webs having high performance are generally described. For instance, in some embodiments, a non-woven fiber web described herein has a relatively high value of gamma and/or a relatively high ratio of dust holding capacity to basis weight. As another example, in some embodiments, a non-woven fiber web described herein is capable of being loaded with dust relatively uniformly throughout its depth. This latter property may assist with increasing the gamma and/or the ratio of dust holding capacity to basis weight.
B01D 39/16 - Autres substances filtrantes autoportantes en substance organique, p. ex. fibres synthétiques
B01D 46/00 - Filtres ou procédés spécialement modifiés pour la séparation de particules dispersées dans des gaz ou des vapeurs
B32B 5/02 - Produits stratifiés caractérisés par l'hétérogénéité ou la structure physique d'une des couches caractérisés par les caractéristiques de structure d'une couche comprenant des fibres ou des filaments
B32B 5/26 - Produits stratifiés caractérisés par l'hétérogénéité ou la structure physique d'une des couches caractérisés par la présence de plusieurs couches qui comportent des fibres, filaments, grains ou poudre, ou qui sont sous forme de mousse ou essentiellement poreuses une des couches étant fibreuse ou filamenteuse un autre couche également étant fibreuse ou filamenteuse
D04H 3/03 - Non-tissés formés uniquement ou principalement de fils ou de matériaux filamenteux similaires de bonne longueur caractérisés par la méthode de formation des voiles ou couches, p. ex. par la réorientation des fils ou filaments au hasard
D04H 3/16 - Non-tissés formés uniquement ou principalement de fils ou de matériaux filamenteux similaires de bonne longueur caractérisés par la méthode de renforcement ou de consolidation avec liages produits par soudage entre fils thermoplastiques ou filaments avec liages entre filaments thermoplastiques produits en relation avec la formation des filaments, p. ex. suivant immédiatement l'extrusion
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.
17 - Produits en caoutchouc ou en matières plastiques; matières à calfeutrer et à isoler
Produits et services
Glass fiber filtration media for air and liquid sold in rolls; Synthetic fiber filtration media for air and liquid sold in rolls; Glass and synthetic fiber filtration media for air and liquid sold in rolls
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 - Séparation de gaz ou de vapeursRécupération de vapeurs de solvants volatils dans les gazÉpuration chimique ou biologique des gaz résiduaires, p. ex. gaz d'échappement des moteurs à combustion, fumées, vapeurs, gaz de combustion ou aérosols par diffusion
A41D 13/11 - Masques de protection du visage, p. ex. pour utilisation chirurgicale ou pour utilisation en atmosphère polluée
B01D 39/16 - Autres substances filtrantes autoportantes en substance organique, p. ex. fibres synthétiques
B01D 46/52 - Séparateurs de particules utilisant des filtres comportant un matériau plié, p. ex. appareils de précipitation de poussières
B01D 46/54 - Séparateurs de particules utilisant des feuilles ou diaphragmes filtrants à structure ultra-fine, p. ex. appareils de précipitation de poussières
B01D 46/62 - Filtres ou procédés spécialement modifiés pour la séparation de particules dispersées dans des gaz ou des vapeurs avec plusieurs éléments filtrants, caractérisés par leur disposition relative montés en série
A62B 23/02 - Filtres en vue de la protection des voies respiratoires pour appareils respiratoires
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 - Séparateurs, membranes ou diaphragmes caractérisés par leur forme
H01M 50/457 - Séparateurs, membranes ou diaphragmes caractérisés par le matériau ayant une structure en couches comprenant au moins trois couches
H01M 50/446 - Matériau composite constitué d’un mélange de matériaux organiques et inorganiques
H01M 50/454 - Séparateurs, membranes ou diaphragmes caractérisés par le matériau ayant une structure en couches comprenant une couche non fibreuse et une couche fibreuse superposées l’une sur l’autre
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 - Moyens de commande de la température associés de façon structurelle avec les éléments par isolation ou protection thermique
H01M 10/651 - Moyens de commande de la température associés de façon structurelle avec les éléments caractérisés par des paramètres spécifiés par une valeur numérique ou une formule mathématique, p. ex. rapports, tailles ou concentrations
D04H 1/732 - Non-tissés formés uniquement ou principalement de fibres coupées ou autres fibres similaires relativement courtes caractérisés par la méthode de formation des voiles ou couches, p. ex. par la réorientation des fibres les fibres étant disposées au hasard par courant de fluide, p. ex. flux d'air
D04H 1/4391 - Non-tissés formés uniquement ou principalement de fibres coupées ou autres fibres similaires relativement courtes à partir de voiles ou couches composés de fibres ne possédant pas des propriétés cohésives réelles ou potentielles caractérisés par l'emploi de certaines sortes de fibres dans la mesure où cet emploi n'a pas d'influence prépondérante sur la consolidation du voile caractérisés par la forme des fibres
D04H 1/58 - Non-tissés formés uniquement ou principalement de fibres coupées ou autres fibres similaires relativement courtes à partir de voiles ou couches composés de fibres ne possédant pas des propriétés cohésives réelles ou potentielles par application, incorporation ou activation de liages chimiques ou thermoplastiques, p. ex. adhésifs
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 - Filtres ou procédés spécialement modifiés pour la séparation de particules dispersées dans des gaz ou des vapeurs avec plusieurs éléments filtrants, caractérisés par leur disposition relative montés en série
B01D 39/16 - Autres substances filtrantes autoportantes en substance organique, p. ex. fibres synthétiques
B01D 46/00 - Filtres ou procédés spécialement modifiés pour la séparation de particules dispersées dans des gaz ou des vapeurs
B01D 46/12 - Séparateurs de particules utilisant des plaques, des feuilles ou des tampons filtrants à surface plane, p. ex. appareils de précipitation de poussières disposés en batteries
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 - Filtres ou procédés spécialement modifiés pour la séparation de particules dispersées dans des gaz ou des vapeurs
B01D 29/01 - Filtres à éléments filtrants stationnaires pendant la filtration, p. ex. filtres à aspiration ou à pression, non couverts par les groupes Leurs éléments filtrants avec des éléments filtrants plats
B01D 39/16 - Autres substances filtrantes autoportantes en substance organique, p. ex. fibres synthétiques
49.
FILTER MEDIA INCLUDING FIBERS COMPRISING POLYVINYLIDENE FLUORIDE AND/OR A COPOLYMER THEREOF, AND RELATED METHODS
B01D 39/14 - Autres substances filtrantes autoportantes
B01D 39/16 - Autres substances filtrantes autoportantes en substance organique, p. ex. fibres synthétiques
B01D 46/54 - Séparateurs de particules utilisant des feuilles ou diaphragmes filtrants à structure ultra-fine, p. ex. appareils de précipitation de poussières
50.
FILTER MEDIA INCLUDING FIBERS COMPRISING A MATRIX POLYMER AND IMPACT MODIFIER, 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 - Autres substances filtrantes autoportantes
B01D 39/16 - Autres substances filtrantes autoportantes en substance organique, p. ex. fibres synthétiques
B01D 39/18 - Autres substances filtrantes autoportantes en substance organique, p. ex. fibres synthétiques la substance étant la cellulose ou ses dérivés
B01D 39/20 - Autres substances filtrantes autoportantes en substance inorganique, p. ex. papier d'amiante ou substance filtrante métallique faite de fils métalliques non-tissés
B01D 46/00 - Filtres ou procédés spécialement modifiés pour la séparation de particules dispersées dans des gaz ou des vapeurs
B01D 46/62 - Filtres ou procédés spécialement modifiés pour la séparation de particules dispersées dans des gaz ou des vapeurs avec plusieurs éléments filtrants, caractérisés par leur disposition relative montés en série
53.
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.
B01D 39/20 - Autres substances filtrantes autoportantes en substance inorganique, p. ex. papier d'amiante ou substance filtrante métallique faite de fils métalliques non-tissés
B01D 39/16 - Autres substances filtrantes autoportantes en substance organique, p. ex. fibres synthétiques
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.
B01D 53/22 - Séparation de gaz ou de vapeursRécupération de vapeurs de solvants volatils dans les gazÉpuration chimique ou biologique des gaz résiduaires, p. ex. gaz d'échappement des moteurs à combustion, fumées, vapeurs, gaz de combustion ou aérosols par diffusion
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 - Séparation de gaz ou de vapeursRécupération de vapeurs de solvants volatils dans les gazÉpuration chimique ou biologique des gaz résiduaires, p. ex. gaz d'échappement des moteurs à combustion, fumées, vapeurs, gaz de combustion ou aérosols par diffusion
B01D 39/16 - Autres substances filtrantes autoportantes en substance organique, p. ex. fibres synthétiques
17 - Produits en caoutchouc ou en matières plastiques; matières à calfeutrer et à isoler
Produits et 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.
59.
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.
B01D 39/20 - Autres substances filtrantes autoportantes en substance inorganique, p. ex. papier d'amiante ou substance filtrante métallique faite de fils métalliques non-tissés
C08L 33/16 - Homopolymères ou copolymères d'esters contenant des atomes d'halogène
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.
B01D 46/52 - Séparateurs de particules utilisant des filtres comportant un matériau plié, p. ex. appareils de précipitation de poussières
B01D 39/20 - Autres substances filtrantes autoportantes en substance inorganique, p. ex. papier d'amiante ou substance filtrante métallique faite de fils métalliques non-tissés
B01D 39/16 - Autres substances filtrantes autoportantes en substance organique, p. ex. fibres synthétiques
B01D 39/18 - Autres substances filtrantes autoportantes en substance organique, p. ex. fibres synthétiques la substance étant la cellulose ou ses dérivés
B01D 46/00 - Filtres ou procédés spécialement modifiés pour la séparation de particules dispersées dans des gaz ou des vapeurs
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 - Séparateurs, membranes, diaphragmes ou éléments d’espacement dans les cellules caractérisés par leurs propriétés physiques, p. ex. degré de gonflement, hydrophilicité ou propriétés pour court-circuiter
17 - Produits en caoutchouc ou en matières plastiques; matières à calfeutrer et à isoler
Produits et 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 - Séparateurs, membranes, diaphragmes ou éléments d’espacement dans les cellules caractérisés par leurs propriétés physiques, p. ex. degré de gonflement, hydrophilicité ou propriétés pour court-circuiter
17 - Produits en caoutchouc ou en matières plastiques; matières à calfeutrer et à isoler
Produits et 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.
67.
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.
B01D 39/20 - Autres substances filtrantes autoportantes en substance inorganique, p. ex. papier d'amiante ou substance filtrante métallique faite de fils métalliques non-tissés
D04H 3/018 - Non-tissés formés uniquement ou principalement de fils ou de matériaux filamenteux similaires de bonne longueur caractérisés par leur forme
D04H 3/016 - Non-tissés formés uniquement ou principalement de fils ou de matériaux filamenteux similaires de bonne longueur caractérisés par leur finesse
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.
B01D 39/20 - Autres substances filtrantes autoportantes en substance inorganique, p. ex. papier d'amiante ou substance filtrante métallique faite de fils métalliques non-tissés
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.
B01D 39/18 - Autres substances filtrantes autoportantes en substance organique, p. ex. fibres synthétiques la substance étant la cellulose ou ses dérivés
B01D 39/20 - Autres substances filtrantes autoportantes en substance inorganique, p. ex. papier d'amiante ou substance filtrante métallique faite de fils métalliques non-tissés
B01D 39/16 - Autres substances filtrantes autoportantes en substance organique, p. ex. fibres synthétiques
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.
17 - Produits en caoutchouc ou en matières plastiques; matières à calfeutrer et à isoler
Produits et 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.
17 - Produits en caoutchouc ou en matières plastiques; matières à calfeutrer et à isoler
Produits et 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 - Séparation de gaz ou de vapeursRécupération de vapeurs de solvants volatils dans les gazÉpuration chimique ou biologique des gaz résiduaires, p. ex. gaz d'échappement des moteurs à combustion, fumées, vapeurs, gaz de combustion ou aérosols par diffusion
B01D 46/62 - Filtres ou procédés spécialement modifiés pour la séparation de particules dispersées dans des gaz ou des vapeurs avec plusieurs éléments filtrants, caractérisés par leur disposition relative montés en série
B01D 39/16 - Autres substances filtrantes autoportantes en substance organique, p. ex. fibres synthétiques
A41D 13/11 - Masques de protection du visage, p. ex. pour utilisation chirurgicale ou pour utilisation en atmosphère polluée
B01D 46/52 - Séparateurs de particules utilisant des filtres comportant un matériau plié, p. ex. appareils de précipitation de poussières
B01D 46/54 - Séparateurs de particules utilisant des feuilles ou diaphragmes filtrants à structure ultra-fine, p. ex. appareils de précipitation de poussières
A62B 23/02 - Filtres en vue de la protection des voies respiratoires pour appareils respiratoires
22 - Cordes; filets; tentes, auvents, voiles et sacs; matières de rembourrage
Produits et 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 - Autres substances filtrantes autoportantes en substance organique, p. ex. fibres synthétiques
B03C 3/28 - Installations fonctionnant sans alimentation en électricité, p. ex. utilisant des "électrets"
B32B 5/26 - Produits stratifiés caractérisés par l'hétérogénéité ou la structure physique d'une des couches caractérisés par la présence de plusieurs couches qui comportent des fibres, filaments, grains ou poudre, ou qui sont sous forme de mousse ou essentiellement poreuses une des couches étant fibreuse ou filamenteuse un autre couche également étant fibreuse ou filamenteuse
83.
FILTER MEDIA COMPRISING A POLYETHERSULFONE-BASED FINE FIBER LAYER
B01D 39/16 - Autres substances filtrantes autoportantes en substance organique, p. ex. fibres synthétiques
B01D 39/18 - Autres substances filtrantes autoportantes en substance organique, p. ex. fibres synthétiques la substance étant la cellulose ou ses dérivés
84.
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 - Substance filtrante pour fluides liquides ou gazeux
B32B 5/02 - Produits stratifiés caractérisés par l'hétérogénéité ou la structure physique d'une des couches caractérisés par les caractéristiques de structure d'une couche comprenant des fibres ou des filaments
D04H 1/728 - Non-tissés formés uniquement ou principalement de fibres coupées ou autres fibres similaires relativement courtes caractérisés par la méthode de formation des voiles ou couches, p. ex. par la réorientation des fibres les fibres étant disposées au hasard par électrofilage
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 - Séparation de gaz ou de vapeursRécupération de vapeurs de solvants volatils dans les gazÉpuration chimique ou biologique des gaz résiduaires, p. ex. gaz d'échappement des moteurs à combustion, fumées, vapeurs, gaz de combustion ou aérosols par adsorption, p. ex. chromatographie préparatoire en phase gazeuse avec adsorbants fixes
B01D 46/00 - Filtres ou procédés spécialement modifiés pour la séparation de particules dispersées dans des gaz ou des vapeurs
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 - Séparation de gaz ou de vapeursRécupération de vapeurs de solvants volatils dans les gazÉpuration chimique ou biologique des gaz résiduaires, p. ex. gaz d'échappement des moteurs à combustion, fumées, vapeurs, gaz de combustion ou aérosols par adsorption, p. ex. chromatographie préparatoire en phase gazeuse avec adsorbants fixes
B01D 53/02 - Séparation de gaz ou de vapeursRécupération de vapeurs de solvants volatils dans les gazÉpuration chimique ou biologique des gaz résiduaires, p. ex. gaz d'échappement des moteurs à combustion, fumées, vapeurs, gaz de combustion ou aérosols par adsorption, p. ex. chromatographie préparatoire en phase gazeuse
B01J 20/06 - Compositions absorbantes ou adsorbantes solides ou compositions facilitant la filtrationAbsorbants ou adsorbants pour la chromatographieProcédés pour leur préparation, régénération ou réactivation contenant une substance inorganique contenant des oxydes ou des hydroxydes des métaux non prévus dans le groupe
B01J 20/08 - Compositions absorbantes ou adsorbantes solides ou compositions facilitant la filtrationAbsorbants ou adsorbants pour la chromatographieProcédés pour leur préparation, régénération ou réactivation contenant une substance inorganique contenant des oxydes ou des hydroxydes des métaux non prévus dans le groupe contenant de l'oxyde ou de l'hydroxyde d'aluminiumCompositions absorbantes ou adsorbantes solides ou compositions facilitant la filtrationAbsorbants ou adsorbants pour la chromatographieProcédés pour leur préparation, régénération ou réactivation contenant une substance inorganique contenant des oxydes ou des hydroxydes des métaux non prévus dans le groupe contenant de la bauxite
89.
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 39/16 - Autres substances filtrantes autoportantes en substance organique, p. ex. fibres synthétiques
B01D 46/52 - Séparateurs de particules utilisant des filtres comportant un matériau plié, p. ex. appareils de précipitation de poussières
B32B 1/00 - Produits stratifiés ayant une forme non plane
B32B 5/02 - Produits stratifiés caractérisés par l'hétérogénéité ou la structure physique d'une des couches caractérisés par les caractéristiques de structure d'une couche comprenant des fibres ou des filaments
B32B 7/035 - Produits stratifiés caractérisés par la relation entre les couchesProduits stratifiés caractérisés par l’orientation relative des éléments caractéristiques entre les couches, ou par les valeurs relatives d’un paramètre mesurable entre les couches, c.-à-d. produits comprenant des couches ayant des propriétés physiques, chimiques ou physicochimiques différentes Produits stratifiés caractérisés par la jonction entre les couches concernant l’orientation des éléments caractéristiques utilisant des dispositions de films étirés, p. ex. de films étirés dans un seul axe et disposés alternativement dans des directions différentes
B32B 38/00 - Opérations auxiliaires liées aux procédés de stratification
17 - Produits en caoutchouc ou en matières plastiques; matières à calfeutrer et à isoler
Produits et 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.
91.
FILTER MEDIA INCLUDING OUT-OF-PLANE SOLID ELEMENTS, METHODS OF FORMING THEM, AND USES THEREOF
B01D 39/02 - Substance filtrante non agglomérée, p. ex. fibres
B01D 39/14 - Autres substances filtrantes autoportantes
B01D 39/16 - Autres substances filtrantes autoportantes en substance organique, p. ex. fibres synthétiques
D04H 3/00 - Non-tissés formés uniquement ou principalement de fils ou de matériaux filamenteux similaires de bonne longueur
D04H 3/08 - Non-tissés formés uniquement ou principalement de fils ou de matériaux filamenteux similaires de bonne longueur caractérisés par la méthode de renforcement ou de consolidation
92.
Filter media including out-of-plane solid elements, methods of forming them, and uses thereof
B01D 39/04 - Substance organique, p. ex. cellulose, coton
B01D 39/18 - Autres substances filtrantes autoportantes en substance organique, p. ex. fibres synthétiques la substance étant la cellulose ou ses dérivés
17 - Produits en caoutchouc ou en matières plastiques; matières à calfeutrer et à isoler
Produits et 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
17 - Produits en caoutchouc ou en matières plastiques; matières à calfeutrer et à isoler
Produits et 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 - Autres substances filtrantes autoportantes
B01D 46/62 - Filtres ou procédés spécialement modifiés pour la séparation de particules dispersées dans des gaz ou des vapeurs avec plusieurs éléments filtrants, caractérisés par leur disposition relative montés en série
B01D 39/16 - Autres substances filtrantes autoportantes en substance organique, p. ex. fibres synthétiques
B01D 39/18 - Autres substances filtrantes autoportantes en substance organique, p. ex. fibres synthétiques la substance étant la cellulose ou ses dérivés
B01D 39/20 - Autres substances filtrantes autoportantes en substance inorganique, p. ex. papier d'amiante ou substance filtrante métallique faite de fils métalliques non-tissés
B01D 46/00 - Filtres ou procédés spécialement modifiés pour la séparation de particules dispersées dans des gaz ou des vapeurs
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.
B01D 39/16 - Autres substances filtrantes autoportantes en substance organique, p. ex. fibres synthétiques
B01D 39/18 - Autres substances filtrantes autoportantes en substance organique, p. ex. fibres synthétiques la substance étant la cellulose ou ses dérivés
B01D 39/20 - Autres substances filtrantes autoportantes en substance inorganique, p. ex. papier d'amiante ou substance filtrante métallique faite de fils métalliques non-tissés
B01D 39/14 - Autres substances filtrantes autoportantes
98.
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.
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.
