Patents Assigned to Hollingsworth & Vose Company
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Publication number: 20230026576Abstract: 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.Type: ApplicationFiled: July 26, 2022Publication date: January 26, 2023Applicant: Hollingsworth & Vose CompanyInventors: Bruce Smith, Mohammad A. Hassan, Maxim Silin, Sudheer Jinka, Greg Wagner Farell, David T. Healey
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Publication number: 20220387916Abstract: 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.Type: ApplicationFiled: June 21, 2022Publication date: December 8, 2022Applicant: Hollingsworth & Vose CompanyInventors: Sudhakar Jaganathan, Douglas M. Guimond, Carrie Liu
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Publication number: 20220362697Abstract: 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.Type: ApplicationFiled: May 14, 2021Publication date: November 17, 2022Applicant: Hollingsworth & Vose CompanyInventors: David F. Sealey, Stuart Williams
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Publication number: 20220355236Abstract: 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.Type: ApplicationFiled: May 24, 2022Publication date: November 10, 2022Applicant: Hollingsworth & Vose CompanyInventor: Jens-Peter Boesner
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Patent number: 11484821Abstract: 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.Type: GrantFiled: December 30, 2020Date of Patent: November 1, 2022Assignee: Hollingsworth & Vose CompanyInventors: Sudhakar Jaganathan, Douglas M. Guimond, Carrie Liu
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Publication number: 20220336925Abstract: 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.Type: ApplicationFiled: April 15, 2021Publication date: October 20, 2022Applicant: Hollingsworth & Vose CompanyInventor: Zhiping Jiang
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Patent number: 11458427Abstract: 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.Type: GrantFiled: November 11, 2020Date of Patent: October 4, 2022Assignee: Hollingsworth & Vose CompanyInventors: Stephen T. Cox, William S. Freeman, Abdoulaye Doucouré, John A. Wertz
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Patent number: 11452959Abstract: 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.Type: GrantFiled: November 30, 2018Date of Patent: September 27, 2022Assignee: Hollingsworth & Vose CompanyInventors: Farzad Rezaei, Abdoulaye Doucouré
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Patent number: 11433332Abstract: 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.Type: GrantFiled: November 5, 2018Date of Patent: September 6, 2022Assignee: Hollingsworth & Vose CompanyInventors: Bruce Smith, Maxim Silin, David T. Healey
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Patent number: 11420143Abstract: 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.Type: GrantFiled: May 4, 2020Date of Patent: August 23, 2022Assignee: Hollingsworth & Vose CompanyInventors: Bruce Smith, Mohammad A. Hassan, Maxim Silin, Sudheer Jinka, Greg Wagner Farell, David T. Healey
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Publication number: 20220249997Abstract: 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.Type: ApplicationFiled: March 7, 2022Publication date: August 11, 2022Applicant: Hollingsworth & Vose CompanyInventors: Sneha Swaminathan, Howard Yu, Siqiang Zhu
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Publication number: 20220247037Abstract: 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.Type: ApplicationFiled: February 17, 2022Publication date: August 4, 2022Applicant: Hollingsworth & Vose CompanyInventors: John A. Wertz, Nicolas Clement, Sachin Kumar, Akshay Ashirgade
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Publication number: 20220241710Abstract: 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 non-woven 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.Type: ApplicationFiled: February 2, 2021Publication date: August 4, 2022Applicant: Hollingsworth & Vose CompanyInventors: Narendiran Vitchuli, Abdoulaye Doucouré, Bruce Smith
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Patent number: 11369904Abstract: 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.Type: GrantFiled: December 30, 2019Date of Patent: June 28, 2022Assignee: Hollingsworth & Vose CompanyInventors: Sudhakar Jaganathan, Douglas M. Guimond, Carrie Liu
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Publication number: 20220193587Abstract: 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.Type: ApplicationFiled: February 3, 2021Publication date: June 23, 2022Applicant: Hollingsworth & Vose CompanyInventors: Xinquan Cheng, Sudhakar Jaganathan, Sudheer Jinka, Praveen Kumar Yegya Raman
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Publication number: 20220193589Abstract: 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.Type: ApplicationFiled: December 18, 2020Publication date: June 23, 2022Applicant: Hollingsworth & Vose CompanyInventors: Xinquan Cheng, Sudhakar Jaganathan, Sudheer Jinka, Praveen Kumar Yegya Raman
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Publication number: 20220193588Abstract: 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.Type: ApplicationFiled: December 18, 2020Publication date: June 23, 2022Applicant: Hollingsworth & Vose CompanyInventors: Sudheer Jinka, Praveen Kumar Yegya Raman, Howard Yu, Xinquan Cheng, Sudhakar Jaganathan
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Publication number: 20220161171Abstract: 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.Type: ApplicationFiled: November 23, 2021Publication date: May 26, 2022Applicant: Hollingsworth & Vose CompanyInventors: Dimitry Papkov, Phillip P. Carpenter, Felix Ahrens
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Publication number: 20220166107Abstract: 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 (?m), 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.Type: ApplicationFiled: December 16, 2021Publication date: May 26, 2022Applicant: Hollingsworth & Vose CompanyInventors: Randall B. Keisler, Maxim Silin, John A. Wertz
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Publication number: 20220161169Abstract: 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.Type: ApplicationFiled: November 23, 2020Publication date: May 26, 2022Applicant: Hollingsworth & Vose CompanyInventors: Dimitry Papkov, Phillip P. Carpenter, Felix Ahrens