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公开(公告)号：US20230051258A1
公开(公告)日：2023-02-16
申请号：US17846441
申请日：2022-06-22
发明人： Sudhakar Jaganathan , Xinquan Cheng , Howard Yu , Leilei Luo , Zhiping Jiang , Yu Liu , Mark Rowlands , Wei Mu , James M. Witsch , Stephan Daus
摘要： 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.
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公开(公告)号：US20210236970A1
公开(公告)日：2021-08-05
申请号：US17236084
申请日：2021-04-21
发明人： Xiaodan Zhang , Douglas M. Guimond , Carrie Liu , Nagendra Anantharamaiah , Sudhakar Jaganathan , Gerald Gadbois , Maxim Silin , Mark A. Gallimore
摘要： 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：US20210229010A1
公开(公告)日：2021-07-29
申请号：US17142710
申请日：2021-01-06
摘要： 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：US20180169551A1
公开(公告)日：2018-06-21
申请号：US15471284
申请日：2017-03-28
CPC分类号： 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
摘要： 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：US20160214044A1
公开(公告)日：2016-07-28
申请号：US14914891
申请日：2014-08-22
发明人： Maxim Silin , Sudhakar Jaganathan
CPC分类号： B01D39/14 , B01D29/00 , B01D33/00 , B01D39/1623 , B01D2239/1216 , B01D2275/10 , B01D2275/305 , B01D2275/307
摘要： Filter media having a gradient in a property and methods associated with such media are provided. In some embodiments, a filter media may have a gradient in mean pore size. The gradient in mean pore size may be across at least a portion of the thickness of the filter media. In some embodiments, the gradient can be represented by an exponential function. The exponential gradient in mean pore size may impart desirable properties to the filter media including enhanced filtration properties (e.g., relatively high dust holding capacity and efficiency), amongst other benefits. The filter media may be particularly well-suited for applications that involve filtering liquids (e.g., hydraulics, fuel, lube, water), though the media may also be used in other applications.
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公开(公告)号：US12017169B2
公开(公告)日：2024-06-25
申请号：US17958123
申请日：2022-09-30
CPC分类号： B01D39/14 , B01D39/163 , B01D39/18 , B01D39/2024 , B01D46/0001 , B01D46/62 , B01D2239/0208 , B01D2239/0457 , B01D2239/0464 , B01D2239/083 , B01D2239/1225 , B01D2239/1233 , B01D2239/1266 , B01D2239/1275 , B01D2239/1291 , B01D2265/04
摘要： 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：US12011686B2
公开(公告)日：2024-06-18
申请号：US18316721
申请日：2023-05-12
CPC分类号： B01D46/62 , A41D13/11 , B01D39/1623 , B01D39/1692 , B01D46/521 , B01D46/543 , A62B23/02 , A62B23/025 , B01D2239/0622 , B01D2239/0631 , B01D2239/065 , B01D2239/1233 , B01D2275/10
摘要： 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：US20220193587A1
公开(公告)日：2022-06-23
申请号：US17166526
申请日：2021-02-03
IPC分类号： B01D39/16
摘要： 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.
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公开(公告)号：US11167232B2
公开(公告)日：2021-11-09
申请号：US16504835
申请日：2019-07-08
摘要： 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：US11014030B2
公开(公告)日：2021-05-25
申请号：US15283014
申请日：2016-09-30
发明人： Xiaodan Zhang , Douglas M. Guimond , Carrie Liu , Nagendra Anantharamaiah , Sudhakar Jaganathan , Gerald Gadbois , Maxim Silin , Mark A. Gallimore
摘要： 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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