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公开(公告)号：US11819790B2
公开(公告)日：2023-11-21
申请号：US17142710
申请日：2021-01-06
Applicant: Hollingsworth & Vose Company
Inventor： Sudhakar Jaganathan , Douglas M. Guimond , Carrie Liu
CPC classification number: B01D39/163 , B01D39/1623 , B01D46/521 , B01D2239/0421 , B01D2239/0435 , B01D2239/0622 , B01D2239/0631 , B01D2239/0681 , B01D2239/083 , B01D2239/1233 , B01D2239/1275 , B01D2275/105 , B01D2279/51 , B01D2279/55 , B01D2279/60
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.
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公开(公告)号：US11738295B2
公开(公告)日：2023-08-29
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
CPC classification number: B01D39/163 , B01D39/14 , B01D39/1615 , B01D39/18 , B01D39/2089 , B01D2239/0216 , B01D2239/1225 , B01D2239/1258 , B01D2239/1291
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.
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公开(公告)号：US11684885B2
公开(公告)日：2023-06-27
申请号：US17475458
申请日：2021-09-15
Applicant: Hollingsworth & Vose Company
Inventor： Sudhakar Jaganathan , Nagendra Anantharamaiah , Maxim Silin
CPC classification number: B01D46/62 , A41D13/11 , B01D39/1623 , B01D39/1692 , B01D46/521 , B01D46/543 , A62B23/02 , A62B23/025 , B01D2239/065 , B01D2239/0622 , B01D2239/0631 , B01D2239/1233 , B01D2275/10
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.
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公开(公告)号：US20220387916A1
公开(公告)日：2022-12-08
申请号：US17845477
申请日：2022-06-21
Applicant: Hollingsworth & Vose Company
Inventor： Sudhakar Jaganathan , Douglas M. Guimond , Carrie Liu
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.
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公开(公告)号：US20220193588A1
公开(公告)日：2022-06-23
申请号：US17127822
申请日：2020-12-18
Applicant: Hollingsworth & Vose Company
Inventor： Sudheer Jinka , Praveen Kumar Yegya Raman , Howard Yu , Xinquan Cheng , Sudhakar Jaganathan
Abstract: 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.
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Patent Agency Ranking
公开(公告)号：US20220072462A1
公开(公告)日：2022-03-10
申请号：US17475458
申请日：2021-09-15
Applicant: Hollingsworth & Vose Company
Inventor： Sudhakar Jaganathan , Nagendra Anantharamaiah , Maxim Silin
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.
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公开(公告)号：US20210291094A1
公开(公告)日：2021-09-23
申请号：US17137959
申请日：2020-12-30
Applicant: Hollingsworth & Vose Company
Inventor： Sudhakar Jaganathan , Douglas M. Guimond , Carrie Liu
IPC: B01D39/16 , B32B5/02 , B32B5/26 , B32B7/12 , C09J133/08
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.
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公开(公告)号：US10543441B2
公开(公告)日：2020-01-28
申请号：US15471284
申请日：2017-03-28
Applicant: Hollingsworth & Vose Company
Inventor： Sudhakar Jaganathan , Douglas M. Guimond , Carrie Liu
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.
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公开(公告)号：US20170232372A1
公开(公告)日：2017-08-17
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
CPC classification number: B01D39/163 , B01D39/14 , B01D39/1615 , B01D39/18 , B01D39/2089 , B01D2239/0216 , B01D2239/1225 , B01D2239/1258 , B01D2239/1291
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.
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公开(公告)号：US20160166962A1
公开(公告)日：2016-06-16
申请号：US14966608
申请日：2015-12-11
Applicant: Hollingsworth & Vose Company
Inventor： David F. Sealey , Sudhakar Jaganathan , Randall B. Keisler , David Vallery
IPC: B01D39/20
CPC classification number: B01D39/2024 , B01D39/2017 , B01D2239/04 , B01D2239/064 , B01D2239/0654 , B01D2239/1233
Abstract: Filter media suitable for various applications and related components, systems, and methods associated therewith are described. The filter media may include a composite filter media structure having a substrate and at least one fine fiber layer. The fine fiber layer may include a plurality of glass fibers having an average fiber diameter of less than 2 microns; or, at least 70% by weight of the glass fibers within the fine fiber layer has a fiber diameter of less than 2 microns. The fine fiber layer may further include a fluorochemical composition, an organosilicon composition and may optionally include a binder composition that comprises less than 2% by weight of the fine fiber layer. The filter media may exhibit both a relatively high gamma and favorable mechanical properties. The filter media may be produced by forming a substrate on the surface of a wire in a wet laid process, and forming a fine fiber layer on the substrate while the substrate is on the wire.
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