[12a-W833-1~8] 1.1 Interdisciplinary and General Physics

[12a-W833-1] Static Electricity of Insulating Flexible Intermediate BulK Container for Powder
-Effect of relative humidity on surface charge voltages-

〇Kwang Seok Choi¹, Yuta Endo¹, Yuki Osada², Teruo Suzuki² (1.JNIOSH, 2.Kasuga Denki Inc.)

Keywords:electrostatic charges, Flexible Intermediate Bulk Container, powder

Powder handling operations are conducted to support our daily life and industrial society. However, industrial accidents caused by electrostatic charges or/and discharges on powders are sometimes happened with an insulating flexible container. This paper reports surface voltages on a flexible container bag during power loading and unloading. Polypropylene pellets (PP, 2-3 mm, about 150 kg) was used as power sample. As a result, the maximum surface voltage exceed the 100 kV. And surface voltage decreased by increasing relative humidity.