Effect of Humidity on Nep Movement in Electrostatic Field

摘要

In order to study the effect of humidity on nep movement in electrostatic field, a self-made experiment instrument was made. By this instrument, under the several kinds of different humidity, fiber neps and SCNs (seed coat neps) gotten randomly from card sliver or raw cotton were laid on down-pole-plate and then the up-pole-plate voltage was increased gradually. The voltages when the neps leaving the down-pole-plate were recorded. With statistical method, the take-off voltage averages of different kinds of nep under different humidity were calculated. It can be concluded that charging time of neps decreases largely and the take-off voltages of neps also reduce with the increase of air humidity in certain range.