Patents Assigned to Hollingsworth & Vose Company
  • Publication number: 20240042367
    Abstract: 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.
    Type: Application
    Filed: May 12, 2023
    Publication date: February 8, 2024
    Applicant: Hollingsworth & Vose Company
    Inventors: Sudhakar Jaganathan, Nagendra Anantharamaiah, Maxim Silin
  • Patent number: 11890561
    Abstract: 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: Grant
    Filed: August 10, 2022
    Date of Patent: February 6, 2024
    Assignee: Hollingsworth & Vose Company
    Inventors: Farzad Rezaei, Abdoulaye Doucouré
  • Publication number: 20240021957
    Abstract: 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.
    Type: Application
    Filed: December 6, 2021
    Publication date: January 18, 2024
    Applicant: Hollingsworth & Vose Company
    Inventors: Mahadevaswamy Kodimole Mahadevappa, Girisha Basavaraju, Krishna Marchigowda, Kameswara Rao Patchigolla Venkata, Nagendra Anantharamaiah, Ganesha Maduvinakodi Narasimhamurthy, Manu Patel Mruthunjayappa
  • Publication number: 20230415081
    Abstract: 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.
    Type: Application
    Filed: February 2, 2023
    Publication date: December 28, 2023
    Applicant: Hollingsworth & Vose Company
    Inventors: Bruce Smith, Mohammad A. Hassan, Maxim Silin, Sudheer Jinka, Gregory Wagner Farell, David T. Healey
  • Patent number: 11819789
    Abstract: 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.
    Type: Grant
    Filed: September 30, 2020
    Date of Patent: November 21, 2023
    Assignee: Hollingsworth & Vose Company
    Inventors: Abdoulaye Doucouré, Randall B. Keisler
  • Patent number: 11819790
    Abstract: 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: Grant
    Filed: January 6, 2021
    Date of Patent: November 21, 2023
    Assignee: Hollingsworth & Vose Company
    Inventors: Sudhakar Jaganathan, Douglas M. Guimond, Carrie Liu
  • Publication number: 20230369681
    Abstract: 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.
    Type: Application
    Filed: May 13, 2022
    Publication date: November 16, 2023
    Applicant: Hollingsworth & Vose Company
    Inventor: Zhiping Jiang
  • Patent number: 11804634
    Abstract: 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: Grant
    Filed: February 17, 2022
    Date of Patent: October 31, 2023
    Assignee: Hollingsworth & Vose Company
    Inventors: John A. Wertz, Nicolas Clement, Sachin Kumar, Akshay Ashirgade
  • Publication number: 20230330577
    Abstract: Filter media including fibers comprising polyvinylidene fluoride (PVDF) and/or a copolymer thereof, are generally described.
    Type: Application
    Filed: July 13, 2022
    Publication date: October 19, 2023
    Applicant: Hollingsworth & Vose Company
    Inventors: Praveen Kumar Yegya Raman, Farzad Rezaei
  • Publication number: 20230330585
    Abstract: 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.
    Type: Application
    Filed: April 14, 2022
    Publication date: October 19, 2023
    Applicant: Hollingsworth & Vose Company
    Inventors: Amsarani Ramamoorthy, Siqiang Zhu, Shania Evangelista, Bryan Douglas Dickerson, Kevin Clark, Praveen Kumar Yegya Raman, Keith Higginson
  • Patent number: 11738295
    Abstract: 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.
    Type: Grant
    Filed: April 21, 2021
    Date of Patent: August 29, 2023
    Assignee: Hollingsworth & Vose Company
    Inventors: Xiaodan Zhang, Douglas M. Guimond, Carrie Liu, Nagendra Anantharamaiah, Sudhakar Jaganathan, Gerald Gadbois, Maxim Silin, Mark A. Gallimore
  • Patent number: 11707914
    Abstract: Protective clothing materials and related methods and garments are provided. In some embodiments, a protective clothing material may comprise a fibrous layer that serves as a barrier to certain fluids (e.g., bodily fluids, water) and microbes. The impermeability of the fibrous layer may be due, at least in part, to the structural uniformity and/or relatively small pore size of the fibrous layer. In some embodiments, the fibrous layer may have a relatively high air permeability that imparts beneficial properties (e.g., relatively high air flow, breathability) to the protective clothing material without adversely affecting its protection rating. In certain embodiments, the protective clothing material may also comprise one or more coarse nonwoven webs that impart beneficial properties (e.g., splash resistance) to the protective clothing material.
    Type: Grant
    Filed: June 17, 2019
    Date of Patent: July 25, 2023
    Assignee: Hollingsworth & Vose Company
    Inventors: Nagendra Anantharamaiah, Mark A. Gallimore
  • Patent number: 11684885
    Abstract: 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.
    Type: Grant
    Filed: September 15, 2021
    Date of Patent: June 27, 2023
    Assignee: Hollingsworth & Vose Company
    Inventors: Sudhakar Jaganathan, Nagendra Anantharamaiah, Maxim Silin
  • Publication number: 20230149839
    Abstract: Filter media including fibers comprising a matrix polymer and impact modifier, and related methods, are generally described.
    Type: Application
    Filed: November 18, 2021
    Publication date: May 18, 2023
    Applicant: Hollingsworth & Vose Company
    Inventors: Praveen Kumar Yegya Raman, Keith Higginson, Shania Evangelista, Amsarani Ramamoorthy, Kevin Clark, Bryan Douglas Dickerson
  • Publication number: 20230103716
    Abstract: 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: Application
    Filed: September 30, 2022
    Publication date: April 6, 2023
    Applicant: Hollingsworth & Vose Company
    Inventors: Sudhakar Jaganathan, Douglas M. Guimond, Carrie Liu
  • Publication number: 20230056539
    Abstract: Articles comprising binders, cross-linking agents and/or other components, and related methods are generally disclosed.
    Type: Application
    Filed: August 5, 2021
    Publication date: February 23, 2023
    Applicant: Hollingsworth & Vose Company
    Inventors: Douglas M. Guimond, Mark Snyder
  • Publication number: 20230045984
    Abstract: 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: Application
    Filed: August 10, 2022
    Publication date: February 16, 2023
    Applicant: Hollingsworth & Vose Company
    Inventors: Farzad Rezaei, Abdoulaye Doucouré
  • Publication number: 20230051258
    Abstract: 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: Application
    Filed: June 22, 2022
    Publication date: February 16, 2023
    Applicant: Hollingsworth & Vose Company
    Inventors: Sudhakar Jaganathan, Xinquan Cheng, Howard Yu, Leilei Luo, Zhiping Jiang, Yu Liu, Mark Rowlands, Wei Mu, James M. Witsch, Stephan Daus
  • Publication number: 20230025717
    Abstract: 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: Application
    Filed: July 26, 2022
    Publication date: January 26, 2023
    Applicant: Hollingsworth & Vose Company
    Inventors: Bruce Smith, Maxim Silin, David T. Healey
  • Publication number: 20230026576
    Abstract: 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: Application
    Filed: July 26, 2022
    Publication date: January 26, 2023
    Applicant: Hollingsworth & Vose Company
    Inventors: Bruce Smith, Mohammad A. Hassan, Maxim Silin, Sudheer Jinka, Greg Wagner Farell, David T. Healey