Can ESD-protective garments screen static electric fields? |
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Affiliation: | 1. SP-Electronics, P.O. Box 857, SE-50115 Borås, Sweden;2. Agb-konsult, Barrgränd 19, SE-50467 Borås, Sweden;3. VTT Technical Research Centre of Finland, P.O. Box 1306, FIN-33101 Tampere, Finland;2. Joint Research Laboratory of Optics of Zhejiang Normal University and Zhejiang University, Hangzhou 310058, China;1. Department of Electromechanical Engineering, University of Macau, Macao 999078, China;2. Mechanical Engineering Department, University of California Berkeley, Berkeley, CA 94720, USA;1. Beijing Engineering Research Center of Process Pollution Control, National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China;2. School of Environmental Science and Engineering, North China Electric Power University Baoding, Hebei, 071003, China |
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Abstract: | ESD-protective clothing is used by personal that are handling unprotected electronic products in the electronics manufacturing industry during the manufacturing phase. The main function of an ESD-protective garment is; to screen charges located on the normal clothing of personal, to prevent direct discharges from the same and not to cause any of the above-mentioned problems itself.In this paper we discuss the ability of screening a static electric field for an ESD-protective garment. A phenomenological model of the system is presented and calculations are compared with experimentally obtained values. Fabrics with the following different types of conductive threads are considered: core conducting (CC), surface conducting (SC) and hybrid conducting (HC) using carbon/graphite as conducting element. All the fabrics have similar base fabric and grid density of the conductive threads. The screening ability of these three fabrics is; CC 68%, SC 77% and HC 82%, when they are compared to a thin homogeneous conducting film. |
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