公开(公告)号：US20220105453A1

公开(公告)日：2022-04-07

申请号：US17404349

申请日：2021-08-17

Applicant: Hollingsworth & Vose Company

Inventor： Sudheer Jinka ,  Bruce Smith ,  Mark A. Gallimore

IPC: B01D39/16 ,  B01D39/08

Abstract: 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.

公开(公告)号：US20210236970A1

公开(公告)日：2021-08-05

申请号：US17236084

申请日：2021-04-21

Applicant: Hollingsworth & Vose Company

Inventor： Xiaodan Zhang ,  Douglas M. Guimond ,  Carrie Liu ,  Nagendra Anantharamaiah ,  Sudhakar Jaganathan ,  Gerald Gadbois ,  Maxim Silin ,  Mark A. Gallimore

IPC: B01D39/16 ,  B01D39/18 ,  B01D39/20 ,  B01D39/14

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., 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.

公开(公告)号：US20210178304A1

公开(公告)日：2021-06-17

申请号：US17079394

申请日：2020-10-23

Applicant: Hollingsworth & Vose Company

Inventor： Sudheer Jinka ,  Bruce Smith ,  Mark A. Gallimore

IPC: B01D46/00 ,  B03C3/28 ,  B01D39/16

Abstract: 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.

公开(公告)号：US20220126226A1

公开(公告)日：2022-04-28

申请号：US17517708

申请日：2021-11-03

Applicant: Hollingsworth & Vose Company

Inventor： Syed Gulrez ,  Jeremy Andrew Collingwood ,  Sudheer Jinka ,  Bruce Smith ,  Mark A. Gallimore

IPC: B01D39/16

Abstract: 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.

公开(公告)号：US11123668B2

公开(公告)日：2021-09-21

申请号：US16281428

申请日：2019-02-21

Applicant: Hollingsworth & Vose Company

Inventor： Nagendra Anantharamaiah ,  Sudhakar Jaganathan ,  Gerald Gadbois ,  Maxim Silin ,  Mark A. Gallimore

IPC: B01D39/16

Abstract: Filter media comprising a filtration layer comprising synthetic fibers (e.g., pleatable backer layer) and related components, systems, and methods associated herewith are provided. In some embodiments, the filtration layer comprising synthetic fibers may be a non-woven web comprising a blend of coarse and fine diameter fibers. The filtration layer comprising synthetic fibers may be designed to have desirable performance properties without compromising certain mechanical properties, such as the pleatability of the media. In some embodiments, a filter media, described herein, may comprise the filtration layer comprising synthetic fibers and an efficiency layer. Filter media, as described herein, may be particularly well-suited for applications that involve filtering air, though the media may also be used in other applications.

公开(公告)号：US20180001244A1

公开(公告)日：2018-01-04

申请号：US15200612

申请日：2016-07-01

Applicant: Hollingsworth & Vose Company

Inventor： Siqiang Zhu ,  Mark A. Gallimore ,  Stephen T. Cox

IPC: B01D39/16 ,  A41D13/11 ,  B01D46/00 ,  A62B18/02 ,  A62B23/00

CPC classification number: B01D39/1623 ,  A41D13/11 ,  A62B18/025 ,  A62B23/00 ,  B01D46/0032 ,  B01D2239/0435 ,  B01D2239/065 ,  B01D2239/1225 ,  B01D2239/1233 ,  B01D2239/1266 ,  B01D2275/10

Abstract: Filter 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, high oil repellency, low instantaneous resistance, and/or stable service life. One or more layers of the media may have a certain value of thickness over instantaneous resistance (and/or a ratio of thickness over instantaneous resistance between two layers). 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, respirator equipment), though the media may also be used in other applications.

公开(公告)号：US20170232371A1

公开(公告)日：2017-08-17

申请号：US15045538

申请日：2016-02-17

Applicant: Hollingsworth & Vose Company

Inventor： Nagendra Anantharamaiah ,  Sudhakar Jaganathan ,  Gerald Gadbois ,  Maxim Silin ,  Mark A. Gallimore

IPC: B01D39/16

CPC classification number: B01D39/1623 ,  B01D2239/065 ,  B01D2239/1233 ,  B01D2239/1291

Abstract: Filter media comprising a filtration layer comprising synthetic fibers (e.g., pleatable backer layer) and related components, systems, and methods associated herewith are provided. In some embodiments, the filtration layer comprising synthetic fibers may be a non-woven web comprising a blend of coarse and fine diameter fibers. The filtration layer comprising synthetic fibers may be designed to have desirable performance properties without compromising certain mechanical properties, such as the pleatability of the media. In some embodiments, a filter media, described herein, may comprise the filtration layer comprising synthetic fibers and an efficiency layer. Filter media, as described herein, may be particularly well-suited for applications that involve filtering air, though the media may also be used in other applications.

公开(公告)号：US11707914B2

公开(公告)日：2023-07-25

申请号：US16442723

申请日：2019-06-17

Applicant: Hollingsworth & Vose Company

Inventor： Nagendra Anantharamaiah ,  Mark A. Gallimore

IPC: A41D31/102 ,  A61B46/00 ,  D04H1/559 ,  A41D13/12 ,  D04H1/4374 ,  A41H43/04 ,  D04H1/56 ,  B32B5/26 ,  B32B5/02 ,  B32B7/02 ,  B32B7/12 ,  B32B37/12 ,  B32B37/14 ,  B32B37/18 ,  B32B38/00

CPC classification number: B32B5/26 ,  A41D13/12 ,  A41D13/1209 ,  A41D31/102 ,  A41H43/04 ,  A61B46/00 ,  A61B46/40 ,  B32B5/022 ,  B32B7/02 ,  B32B7/12 ,  B32B37/12 ,  B32B37/144 ,  B32B37/185 ,  B32B38/0012 ,  D04H1/4374 ,  D04H1/559 ,  D04H1/56 ,  A41D2500/30 ,  A41D2500/50 ,  B32B2038/0064 ,  B32B2262/0253 ,  B32B2305/28 ,  B32B2307/724 ,  B32B2323/10 ,  B32B2535/00 ,  B32B2571/00

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. The protective clothing materials, described herein, may be particularly useful for a wide variety of applications, including the formation of AAMI level 4 protective garments.

公开(公告)号：US11014030B2

公开(公告)日：2021-05-25

申请号：US15283014

申请日：2016-09-30

Applicant: Hollingsworth & Vose Company

Inventor： Xiaodan Zhang ,  Douglas M. Guimond ,  Carrie Liu ,  Nagendra Anantharamaiah ,  Sudhakar Jaganathan ,  Gerald Gadbois ,  Maxim Silin ,  Mark A. Gallimore

IPC: B01D39/16 ,  B01D39/18 ,  B01D39/20 ,  B01D39/14

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., 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.

公开(公告)号：US10322562B2

公开(公告)日：2019-06-18

申请号：US15661108

申请日：2017-07-27

Applicant: Hollingsworth & Vose Company

Inventor： Nagendra Anantharamaiah ,  Mark A. Gallimore

IPC: A41D13/12 ,  B32B5/26 ,  B32B7/12 ,  B32B37/18 ,  B32B38/00 ,  B32B37/14 ,  B32B37/12 ,  B32B7/02 ,  A61B46/00 ,  A41D31/00 ,  A41H43/04 ,  D04H1/56 ,  B32B5/02

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. The protective clothing materials, described herein, may be particularly useful for a wide variety of applications, including the formation of AAMI level 4 protective garments.