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1. 发明申请

US20180243674A1 ELECTRET-CONTAINING FILTER MEDIA 审中-公开
公开(公告)号：US20180243674A1
公开(公告)日：2018-08-30
申请号：US15901132
申请日：2018-02-21
申请人： Hollingsworth & Vose Company
发明人： Syed Gulrez , Jeremy Andrew Collingwood , Sudheer Jinka , Bruce Smith , Mark A. Gallimore
IPC分类号： B01D39/16 , B01D46/00
CPC分类号： B01D39/1623 , B01D46/0028 , B01D46/0032 , B01D2239/0241 , B01D2239/0435 , B01D2239/0442 , B01D2239/0457 , B01D2239/1258 , B01D2239/1291
摘要： 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.

2. 发明公开

US20240207764A1 HIGH PERFORMANCE FILTER MEDIA 审中-公开
公开(公告)号：US20240207764A1
公开(公告)日：2024-06-27
申请号：US18087710
申请日：2022-12-22
申请人： Hollingsworth & Vose Company
发明人： Siqiang Zhu , Yu Liu , Syed Gulrez , Gregory Wagner Farell , Brian Swortzel , David T. Healey
IPC分类号： B01D39/16 , B01D46/00 , B32B5/02 , B32B5/26 , D04H3/007 , D04H3/03 , D04H3/16
CPC分类号： B01D39/1623 , B01D46/0032 , B32B5/022 , B32B5/268 , D04H3/007 , D04H3/03 , D04H3/16 , B01D2239/025 , B01D2239/0435 , B01D2239/0618 , B01D2239/0622 , B01D2239/0654 , B01D2239/1216 , B01D2239/1233 , B01D2239/1258 , B01D2239/1266 , B01D2239/1275 , B01D2239/1291 , B01D2275/10 , B32B2250/02 , B32B2250/20 , B32B2262/0253 , B32B2262/16 , B32B2307/20 , B32B2307/546 , B32B2307/718 , B32B2307/724 , B32B2307/732 , D10B2321/022 , D10B2401/062 , D10B2505/04
摘要： Filter media comprising non-woven fiber webs having high performance are generally described. For instance, in some embodiments, a non-woven fiber web described herein has a relatively high value of gamma and/or a relatively high ratio of dust holding capacity to basis weight. As another example, in some embodiments, a non-woven fiber web described herein is capable of being loaded with dust relatively uniformly throughout its depth. This latter property may assist with increasing the gamma and/or the ratio of dust holding capacity to basis weight.

3. 发明申请

US20220126226A1 ELECTRET-CONTAINING FILTER MEDIA 有权
公开(公告)号：US20220126226A1
公开(公告)日：2022-04-28
申请号：US17517708
申请日：2021-11-03
申请人： Hollingsworth & Vose Company
发明人： Syed Gulrez , Jeremy Andrew Collingwood , Sudheer Jinka , Bruce Smith , Mark A. Gallimore
IPC分类号： B01D39/16
摘要： 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.

4. 发明申请

US20210370218A1 FILTER MEDIA COMPRISING ADSORPTIVE PARTICLES 有权
公开(公告)号：US20210370218A1
公开(公告)日：2021-12-02
申请号：US16888523
申请日：2020-05-29
申请人： Hollingsworth & Vose Company
发明人： Juliane Daus , Abdoulave Doucouré , Greg Wagner Farell , Syed Gulrez , Brian Swortzel , David T. Healey
IPC分类号： B01D53/04 , B01D46/00
摘要： Filter media comprising adsorptive particles are generally described. In some embodiments, the adsorptive particles are present in a relatively large amount, in a layer discrete from one or more other layers and/or fiber webs also present in the filter media, and/or in a layer that comprises a relatively low amount of fibers. In some embodiments, the filter media further comprises a non-woven fiber web comprising fibers with relatively small diameters.

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