Effect of drum friction test conditions on electric charge accumulation on anti-static clothing

In order to study the electric charges produced by friction on the anti-static clothing,an experiment was carried out in accordance with China National Standard GB 12014—2009 Anti-static Clothingby using drum friction method to measure the accumulated charges on the anti-static clothing during friction against a standard test cloth on the drum,and the induction collection of the charges were performed using Faraday cage and related devices. The collected charge quantity as affected by the relative humidity( RH) of air was investigated with a viewpoint of test reliability,along with the impact of friction duration on the static charge accumulation. The results showed: the distribution of electric charges is between 0. 10 μC and 0. 40 μC after 100 cycles of friction,which looks more dispersive than that( 0. 2 μC) in the GB 12014—2009. The average value of the result of more than 50 cycles of friction test is more reliable. As each friction time extends,the magnitude of electric charges does not increase. However,the mean value of electric charges slightly decreases as the friction cycle increases. It is demonstrated that electric charges decrease as the RH increases in the 60% distribution zone( 0. 19- 0. 25 μC). But the trend is not obvious for overall charge distribution.