Charging characteristics of a nonwoven sheet air filter

Author

Oda, Tetsuji ; Ochiai, Jun

Author_Institution

Dept. of Electr. Eng., Tokyo Univ., Japan

fYear

1988

fDate

1-3 Sep 1988

Firstpage

515

Lastpage

519

Abstract

Corona-charging characteristics of a nonwoven polypropylene sheet of 140-μm thickness are studied with respect to the charging conditions. When the grid voltage, V_g, which controls the surface potential of the film, is -3 kV, the surface potential profile of the charged sheet is nonuniform. The profile is very uniform when V_g is only 1 -kV. The average surface potential of the charge sheet is roughly -500 V in both cases if charging time is long enough (e.g. more than 30 min). The experimental results for charge decay with time, resistivity in normal or ion-rich conditions, and TSDC curves are also reported

Keywords

corona; dielectric depolarisation; dielectric polarisation; polymers; surface potential; thermally stimulated currents; TSDC curves; charge decay; charging conditions; charging time; corona charging characteristics; grid voltage; nonuniform profile; nonwoven sheet air filter; polypropylene; resistivity; surface potential; thermally stimulated depolarisation current; Air cleaners; Conductivity; Electrets; Filters; Filtration; Rough surfaces; Surface charging; Surface discharges; Surface roughness; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrets, 1988. (ISE 6) Proceedings., 6th International Symposium on (IEEE Cat. No.88CH2593-2)

Conference_Location

Oxford

Type

conf

DOI

10.1109/ISE.1988.38614

Filename

38614