Title:
エレクトレット
Document Type and Number:
Japanese Patent JP4437232
Kind Code:
B2
Abstract:
Electrets can be produced from cycloolefin copolymers (COCs), and charges applied thereto are stable for long periods, even at high temperatures and high relative humidities. The reduction here in a positive charge applied to the COCs is smaller than that of negative charges applied to the COCs. The stability over time of the charges applied is impaired by adding polar additives, such as inorganic silicon compounds. Films, fibers or nonwovens produced from electrets can be processed to give filters.
Inventors:
Hatke, Wilfried
Zessler, Gerhard
Yang, Guo-mao
Zessler, Gerhard
Yang, Guo-mao
Application Number:
JP50162699A
Publication Date:
March 24, 2010
Filing Date:
June 12, 1998
Export Citation:
Assignee:
Ticona GmbH
International Classes:
B01D39/14; H01G7/02; B32B15/08; C08F32/00; C08F36/00; C08F210/00; C08J5/18; D01F6/04; D06M10/00
Domestic Patent References:
| JP5217802A | ||||
| JP6340769A | ||||
| JP2271607A |
Attorney, Agent or Firm:
Shinjiro Ono
Kazuo Shamoto
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Kazuo Shamoto
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita