公开(公告)号：US20230311038A1

公开(公告)日：2023-10-05

申请号：US18019424

申请日：2021-08-03

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Fuming Li ,  John Brandner ,  Richard Webb ,  Siwei Leng ,  Nathan E. Schultz

IPC: B01D39/16 ,  D06M10/02 ,  D04H1/56 ,  D04H1/4291 ,  D01F1/10 ,  D06M11/05 ,  D04H3/16 ,  D04H3/007 ,  D01F6/46

CPC classification number: B01D39/1623 ,  D01F1/10 ,  D01F6/46 ,  D04H1/4291 ,  D04H1/56 ,  D04H3/007 ,  D04H3/16 ,  D06M10/025 ,  D06M11/05 ,  D06M2101/20

Abstract: Electret webs include a thermoplastic resin and a charge-enhancing additive. The charge-enhancing additive is a substituted-benzoic acid or a substituted-benzoate salt. The benzoic acid and benzoate salts are substituted by a hydroxyl or amino group at the ortho position or 1 position of the benzene ring. The benzene ring may contain additional substituent groups. The substituted-benzoate salt may have a monovalent, divalent, or trivalent metal counteraction.