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公开(公告)号：US11982031B2
公开(公告)日：2024-05-14
申请号：US17794281
申请日：2021-01-20
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Fuming B. Li , John M. Brandner , Nathan E. Schultz , John M. Sebastian
CPC classification number: D04H1/435 , B01D39/16 , B01D39/1692 , D01F1/10 , D04H1/4382 , D04H3/011 , D04H3/14 , B01D2239/0435
Abstract: Charged polymeric webs, such as electret webs, include a thermoplastic resin and a charge-enhancing additive. The additives are substituted heterocyclic thiols. The heterocyclic thiol has 2 nitrogen groups and a third group that may be an NH, N—NH2, O, or S group. The substituent group is an aromatic or heterocyclic aromatic group. The electret webs may be a non-woven fibrous web or a film. The electret webs are suitable for use as filter media.
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公开(公告)号：US20230095033A1
公开(公告)日：2023-03-30
申请号：US17795022
申请日：2021-01-19
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Fuming B. Li , Duane D. Fansler , Anthony F. Schultz , John M. Brandner , Nathan E. Schultz , John M. Sebastian
IPC: C08K5/46 , C07D249/12 , C07D271/113 , C07D285/125 , C08K5/378 , B01D39/16 , D01F1/09 , D04H1/4291 , D01F6/06 , D06M10/02 , D01D5/098 , D04H3/14 , D04H3/007 , D04H1/56
Abstract: Charged polymeric webs, such as electret webs, include a thermoplastic resin and a charge-enhancing additive. The additives are substituted heterocyclic thiolate salts. The heterocyclic thiolate salt has 2 nitrogen groups and a third group that may be an NH, N—NH2, O, or S group. The substituent group is an aromatic or heterocyclic aromatic group. The electret webs may be a non-woven fibrous web or a film. The electret webs are suitable for use as filter media.
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公开(公告)号：US11452891B2
公开(公告)日：2022-09-27
申请号：US16282774
申请日：2017-08-15
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： John M. Sebastian , Christopher A. Hurley , Kenneth J. Krepel , Pierre Legare , Fuming B. Li , Paul A. Martinson , Bong Y. Yeom
Abstract: A pleated filter element comprising a pleated filter media comprising a plurality of oppositely-facing pleats with a pleat direction and with a plurality of upstream and downstream pleat tips and pleat valleys, wherein the pleated filter media comprises two corrugated edges and two noncorrugated edges. The first (second) corrugated edge of the pleated filter media comprises an edge dam of hardened adhesive that occupies the upstream and downstream pleat valleys at a location laterally inwardly proximate the first (second) corrugated edge and that extends along an entire longitudinal extent of the pleated filter media. The pleated filter media is a multilayer media comprising an organic polymeric nonwoven web, that exhibits a Percent Penetration of less than 5, laminated with a fiberglass prefilter layer that is disposed upstream of the primary filtration layer and that exhibits a Percent Penetration of greater than about 70.
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公开(公告)号：US10724171B2
公开(公告)日：2020-07-28
申请号：US15741370
申请日：2016-06-30
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Nathan E. Schultz , Fuming B. Li , Kelly A. Volp , John M. Sebastian
IPC: B01D39/16 , D06M10/02 , D04H13/00 , D04H3/16 , D04H1/42 , D06M10/08 , D06M13/352 , D06M101/20 , D06M101/22 , D06M101/32
Abstract: Electret webs include a thermoplastic resin and a charge-enhancing additive. The charge-enhancing additive is a substituted benzotriazole phenolate salt or a combination of substituted benzotriazole phenolate salts. The electret webs may be a non-woven fibrous web or a film. The electret webs are suitable for use as filter media.
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5.发明公开公开(公告)号：US20240009606A1
公开(公告)日：2024-01-11
申请号：US18252199
申请日：2021-11-29
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Kelly A. Volp , Nathan E. Schultz , Daniel C. Duan , Seth M. Kirk , Fuming B. Li , John M. Sebastian
CPC classification number: B01D39/1623 , C08K5/5399 , A62B23/025 , D04H3/007 , D04H3/16 , D06B1/02 , D06M10/025 , D06M11/05 , C08K2201/001 , C08K2201/019 , B01D2239/0435 , B01D2239/10 , B01D2239/0622 , B01D2239/0618 , D06M2101/20
Abstract: Described herein is the use of a cyclotriphosphazene core substituted with at least three amino-cyclic carbon groups used as a charge-enhancing additive in a thermoplastic resin. Such compositions may be used in filtering applications.
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Patent Agency Ranking
公开(公告)号：US20220396684A1
公开(公告)日：2022-12-15
申请号：US17762228
申请日：2020-10-07
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Fuming B. Li , Nathan E. Schultz , John M. Brandner , John M. Sebastian
IPC: C08K5/3447 , C07D235/18 , C07D401/04 , C07D417/04 , C08K5/47 , H01B1/20
Abstract: Charged polymeric webs, such as electret webs, include a thermoplastic resin and a charge-enhancing additive. The charge-enhancing additive is a substituted-benzimidazole compound. The electret webs may be a non-woven fibrous web or a film. The electret webs are suitable for use as filter media.
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公开(公告)号：US20220372666A1
公开(公告)日：2022-11-24
申请号：US17621994
申请日：2020-06-24
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Nathan E. Schultz , Daniel C. Duan , Seth M. Kirk , Michael R. Berrigan , Zackary J. Becker , Fuming B. Li , John M. Sebastian
IPC: D01F8/06 , D01F8/14 , D01F8/10 , D01F1/10 , B01D39/16 , D01D5/34 , D04H1/4382 , D04H3/007 , D04H3/011 , D04H3/018 , D04H1/435 , D04H1/4291 , A62B23/02
Abstract: A thermoplastic core-sheath fiber comprises: a polymer fiber core having a coextensive sheath layer disposed thereon, and an electrostatic charge enhancing additive. The sheath layer may comprise poly(4-methyl-1-pentene) and the fiber core and the sheath layer have different compositions. At least one of the fiber core or the sheath layer comprises an electret charge. A nonwoven fibrous web comprising the core-sheath fibers and a respirator including the nonwoven fibrous web are also disclosed.
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公开(公告)号：US20160067717A1
公开(公告)日：2016-03-10
申请号：US14784634
申请日：2014-04-15
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Nathan E. Schultz , Fuming B. Li , John M. Sebastian
CPC classification number: B03C3/28 , B01D39/1607 , B01D39/1623 , B01D2239/0435 , H01B1/12
Abstract: Electret webs include a thermoplastic resin and a charge-enhancing additive. The charge-enhancing additive is an arylamino-substituted benzoic acid or an arylamino-substituted benzoic acid salt. The electret webs may be a non-woven fibrous web or a film. The electret webs are suitable for use as filter media.
Abstract translation: 驻极体网包括热塑性树脂和电荷增强添加剂。 电荷增强添加剂是芳基氨基取代的苯甲酸或芳基氨基取代的苯甲酸盐。 驻极体网可以是非织造纤维网或膜。 驻极体网适用于过滤介质。
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公开(公告)号：US20230390678A1
公开(公告)日：2023-12-07
申请号：US18249989
申请日：2021-11-01
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Nathan E. Schultz , Zackary J. Becker , Daniel C. Duan , Himanshu Jasuja , Seth M. Kirk , Fuming B. Li , John M. Sebastian , Georgiy Teverovskiy
IPC: B01D39/16 , D01F8/06 , D01F8/16 , D04H1/4382 , D04H3/007
CPC classification number: B01D39/1623 , D01F8/06 , D01F8/16 , D04H1/43828 , D04H3/007 , A62B23/02
Abstract: Described herein is a thermoplastic core-sheath fiber. The thermoplastic core-sheath fiber comprises a core having a coextensive sheath layer disposed thereon, wherein the core comprises a first polymeric resin and an electrostatic charge enhancing additive, and the sheath layer comprising a second polymeric resin, with the proviso that if the second polymeric resin comprises poly(4-methyl-1-pentene), then the second polymeric resin does not comprise 100 wt % of poly(4-methyl-1-pentene). These thermoplastic core-sheath fibers can be used in filtering applications.
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公开(公告)号：US20220323890A1
公开(公告)日：2022-10-13
申请号：US17622045
申请日：2020-06-12
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Nathan E. Schultz , Daniel C. Duan , Seth M. Kirk , Michael R. Berrigan , Zackary J. Becker , Fuming B. Li , John M. Sebastian
Abstract: A filter assembly comprises an air filter medium and a prefilter medium. The prefilter medium comprises a second nonwoven fibrous web comprising poly(4-methylpentene) and an electrostatic charging additive and has a second electret charge. The filter assembly is configured such that air passing through the prefilter is directed through the air filter medium. A respirator includes the filter assembly. A prefilter assembly comprises a third nonwoven fibrous web retained by a prefilter frame. The third nonwoven fibrous web comprises: core-sheath fiber comprising a fiber core having a poly(4-methylpentene) sheath layer disposed thereon; and an electrostatic charging additive, wherein the electrostatic charging additive is contained in at least one of the fiber core or the sheath layer. The third nonwoven fibrous web has a third electret charge.
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