Title :
Charging characteristics of some powders used in electrostatic coating
Author_Institution :
Wolfson Electrostatics Advisory Unit, Electrical Engineering Department, University of Southampton, South-Hampton, England S09 5NH.
Abstract :
Preliminary studies have been carried out on charging characteristics of two epoxy powders and a polytetrafluoroethylene (PTFE) by measuring charge-to-mass ratios (Q/m). The epoxy powders were charged by corona current and the PTFE by triboelectric. The results indicate that for the PTFE powder, the mean Q/m is inversely proportional to the particle radius, whereas for epoxy powders the pigmentation and the surface chemistry of the particles have a dominant effect on the mean Q/m values. The deposition efficiencies of the epoxy powders were found to be a function of the mean Q/m.
Keywords :
Chemistry; Coatings; Corona; Current measurement; Electrostatic measurements; Industry Applications Society; Permittivity; Pigmentation; Powders;
Journal_Title :
Industry Applications, IEEE Transactions on
DOI :
10.1109/TIA.1981.4503909
