Surface charging limit for a woven fabric on a ground plane

摘要: Abstract This paper investigates the problem of depositing maximum possible charge on a sheet porous material, such as cloth, using corona discharge. In experiments, 50 to 75 μm-thick samples nylon parachute fabric varying porosity were charged over ground plane ions generated by pin array energized at 6 kV – 9 dc and 0.5 cm gap spacing. The cloth exhibited material-dependent surface potential that was independent electrodes. characteristic larger for low-porosity fabrics (tighter weave pattern), reaching high approximately 600V 65 μm-thick, “zero porosity”, calendared ripstop nylon. Maximum potentials order 200–500 V observed higher-porosity, “standard-issue” similar thicknesses. experiments suggest fundamental limit depends properties but not charging voltage. results can be explained, in part, back ionization discharge mechanism limits indefinite build up charge. onset is predicted from Paschen breakdown curve geometry cloth. Breakdown field strengths inside pores material estimated simple dielectric layer model.