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Effects of Packing Conditions on Apparent Resistivity Measurements of Polymer Powders  

Park, K.S (Graduate School of Science and Engineering, Ibaraki University)
S. Kawai (Graduate School of Science and Engineering, Ibaraki University)
Kim, T.Y. (School of Safety Science, New South Wales University)
M. Yamaguma (National Institute of Industrial Safety)
T. Kodama (National Institute of Industrial Safety)
J.H Joung (Department of Safety Engineering, Seoul National University of Technology)
M. Masui (Department of Electrical and Electronic Engineering, Ibaraki University)
M. Takeuchi (Department of Electrical and Electronic Engineering, Ibaraki University)
Publication Information
KIEE International Transactions on Electrophysics and Applications / v.12C, no.4, 2002 , pp. 229-235 More about this Journal
Abstract
The apparent volume resistivity of powders measured by both the tapping and the compressing methods was compared in this study. Factors such as applied voltage, pressure, corona charging, and so on affecting the apparent volume resistivity of polymer powders were also examined experimentally. Powders of polyacrylonitrile and Nylon 11 were mainly used. The values of the apparent resistivity of polymer powders taken by the tapping method turned out to be larger than those taken by the compressing method, which indicates that the apparent volume resistivity of polymer powders depends strongly on the measurement method. The apparent resistivity of polymer powders increased with an increase in applied voltage while it decreased with an increase in pressure, tapping time, and particle size. The influence of the moisture content of powder and corona charging on the resistivity of polymer powders is also discussed.
Keywords
polymer powders; apparent volume resistivity; packing conditions;
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