The investigation of fiber carding performance with the application of static electricity to carded nonwoven fabric process

Hsing, Wen Hao; Lin, Jia‐Horng; Kao, Kuo-Ting

doi:10.1016/j.jmatprotec.2007.04.090

Cited by 9 publications

(8 citation statements)

References 5 publications

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“…The measured electrostatic potential of PP-A to PP-E was as high as ~30 kV and as low as ~3 kV (Fig. 1c) depending on the type of PP material and the rotation speed of the conveyance roller [1,3]. During the operation, the relative humidity and temperature in the PP factory were ~40% RH and ~30°C, respectively.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Roll-to-roll (RtR) manufacturing has been one of the most employed processes in the production lines of many industries because of its high processing speeds to achieve large production volumes [1][2][3][4]. RtR manufacturing is an ideal method for developing thin and flexible web or sheetbased products, including printed electronic displays, solar cells, packaging film, and nonwoven products [1][2][3]5]. However, RtR manufacturing could result in the quick buildup of electrostatic charges, resulting in exceptionally high electrostatic potential and electrostatic discharge (ESD) if the induced electric field condition is satisfied for breakdown in air [3,[6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…However, RtR manufacturing could result in the quick buildup of electrostatic charges, resulting in exceptionally high electrostatic potential and electrostatic discharge (ESD) if the induced electric field condition is satisfied for breakdown in air [3,[6][7][8]. ESD can release a large amount of energy, resulting in merchandise defects and risks for both the operators and machines employed during the manufacturing process [1,3,[9][10][11]. For instance, ESD results in defects in light-sensitive photographic-film products.…”

Section: Introductionmentioning

confidence: 99%

“…In this study, we investigate the ESD associated with nonwoven polypropylene (PP) manufacturing, which involves multiple RtR manufacturing processes. The highly stored electrostatic charge of PP winding roll can result in severe shocks, which can be a risk to automated machines and operators that touch and unload the wound rolls for the next operation; this includes potentially severe damage to the web forming quality [1,3,16]. Similar to a Van de Graaff generator [10,17], the electrostatics associated with the PPbased RtR manufacturing can be usually attributed to the tribocharging and triboelectric effect because two chemically distinct materials of the PP web and the conveyance roller element surface contact each other.…”

Section: Introductionmentioning

confidence: 99%

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Self-Induced Localized Electric-Field-Enhanced Electrostatic Electron Emission in Polypropylene Surface-Based Roll-to-Roll Manufacturing

2020

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The roll-to-roll (RtR) Manufacturing can produce a large amount of electrostatic charges. In terms of industrial safety, a large amount of energy can be released via electrostatic discharge (ESD) that can cause severe shocks, which can be a risk to automated machines, operators, and merchandise. In this study, the ESD associated with the existing nonwoven Polypropylene (PP) manufacturing is minimized by designing and introducing a sharp-edge metal bar with a radius of curvature of ~100 µm as a passive electrostatic charge dissipation system next to the PP winding stock roll. The coulombic force from the deposited charges on PP can induce a highly localized electric field (up to ~10 6 V/cm) between the grounded metal edge and the nanoscale surface of the nonwoven PP fabric that reduces the potential barrier, causing electrostatic electron/ion emission or discharge from the insulating PP winding surface to the ambient air, especially along the metal edge. Further, the level of static charge associated with the RtR process is characterized using a noncontact electrostatic field (E-field) meter without contaminating and interrupting the production lines. Furthermore, the three-dimensional finite element method (FEM) is used to obtain an accurate electrostatic charge distribution based on the actual size of the winding stock roll, providing a comprehensive understanding of the self-induced E-field-assisted ESD during operation. The experiment and simulation indicate that ~75% of the effective stored charge density is transferred through the air. Therefore, the induced field emission structure is cost effective for dissipating the electrostatic charges and minimizing the ESD hazards. INDEX TERMSElectrostatic discharge, Electron emission, Electric field, Polypropylene, Roll-to-roll manufacturing KHOMSAN RUANGWONG received the B.Sc. Degree in electrical engineering from the Faculty of Electrical Engineering, Kasetsart University Sriracha Campus, Thailand in 2016. He previously worked in High-voltage system in Mitsubishi Electric Thai Auto-Parts Co., Ltd. and Fuji Tusco Co., Ltd during 2016 to 2018. He is currently pursuing the M.Sc. degree in the Department of Electrical Engineering with the focus of high voltage and electric field applications, including corona discharge plasma, electrostatic discharge in manufacturing and insulator and dielectric phenomena in high voltage system. CHAYAPORN THAMMANIPHIT received the B.Sc. Degree in electrical engineering from the Faculty of Electrical Engineering, Kasetsart University, Thailand in 2019. She is currently pursuing the M.Sc. degree in the Department of Electrical Engineering. She is a Research Assistant with the Electrons and Semiconductor Laboratory. Her research interests include nonthermal plasma discharge processes and innovation plasma applications, electron and electrostatic discharges. SIWAPON SRISONPHAN. (M'13) received the B.S. degree in electronic engineering from King Mongkut'

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Section: Introductionmentioning

confidence: 99%