发明名称 |
método de fabricação de um artigo de eletreto, método para fabricação de um elemento filtrante e método para fabricação de respirador |
摘要 |
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. |
申请公布号 |
BRPI0909967(A2) |
申请公布日期 |
2015.10.20 |
申请号 |
BR2009PI09967 |
申请日期 |
2009.04.14 |
申请人 |
3M INNOVATIVE PROPERTIES COMPANY |
发明人 |
DANIEL A. JAPUNTICH;FUMING B. LI;JOHN M. SEBASTIAN;JUSTIN L. KEOUGH;MARVIN E. JONES;NATHAN E. SCHULTZ;RAHUL R. SHAH;SHIH-HUNG CHOU |
分类号 |
A62B18/02;B01D39/16;D06M13/335 |
主分类号 |
A62B18/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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