Invention Grant
- Patent Title: Method of making electret articles based on zeta potential
- Patent Title (中): 基于ζ电位制作驻极体制品的方法
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Application No.: US12131770Application Date: 2008-06-02
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Publication No.: US07765698B2Publication Date: 2010-08-03
- Inventor: John M. Sebastian , Marvin E. Jones , Fuming B. Li , Shih-Hung Chou , Nathan E. Schultz , Justin L. Keough , Rahul R. Shah , Daniel A. Japuntich
- Applicant: John M. Sebastian , Marvin E. Jones , Fuming B. Li , Shih-Hung Chou , Nathan E. Schultz , Justin L. Keough , Rahul R. Shah , Daniel A. Japuntich
- Applicant Address: US MN St. Paul
- Assignee: 3M Innovative Properties Company
- Current Assignee: 3M Innovative Properties Company
- Current Assignee Address: US MN St. Paul
- Agent Karl G. Hanson
- Main IPC: B23P15/16
- IPC: B23P15/16 ; B01D21/00 ; B01L9/00
Abstract:
A method of making an electret article, from a polymeric article that has a zeta potential of greater than or less than −7.5 millivolts. The article is charged by contacting it with an aqueous liquid that has a pH and conductivity as follows: (i) if the article has a zeta potential of −7.5 mV or less, then the contacting liquid has pH greater than 7 and a conductivity of 5 to 9,000 microSiemens per centimeter; and (ii) if the article has a zeta potential of greater than −7.5 mV, then the contacting liquid has a pH of 7 or less and a conductivity of 5 to 5,500 microSiemens per centimeter. An electret article made in this manner can provide improved electret performance, particularly in electret filtration articles.
Public/Granted literature
- US20090293279A1 METHOD OF MAKING ELECTRET ARTICLES BASED ON ZETA POTENTIAL Public/Granted day:2009-12-03
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