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Static charges on unwinds of web processing machines

Electrostatic charges pose a risk to the working of web processing machines. Installing static eliminating bars from Valence nullifies the charge and makes it safe for operations.
To find out more about Valence Electrons:
Valence AC VS 20 Active Anti-static Eliminator:
Valence Electron's range of static elimination products:

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Static charges on unwinds of web processing machines

  1. 1. VALENCE ELECTRONS PRIVATE LIMITED 32 K R Colony, Domlur Layout, Bangalore 560 071, India T: +91-80-4125 6570 E: W: Registered Office: 43 Dr V B Gandhi Marg, Fort, Mumbai 400 023, India CIN: U74999MH2000PTC127595 Application note Published date: 31-12-2016 | Rev: 1A Page 1 Static charges on unwinds of web processing machines Problem Electrostatic charges are common on unwinds, due to the process of separation of the web at the unwinder. The surface voltage can be as much as ±50 kV, or even higher. This may hamper the process ahead, or create operator hazard, or pose the risk of fire, etc. Hence it is important to eliminate static charges. Solution Valstat ® VS 20 (up to 300 m/min) or Valstat ® VR 20 (up to 1200 m/min) AC static eliminating bars provide an effective solution in nullifying the effect of static charges in this application. It is recommended to install two static eliminating bars on the web path after unwinder as shown in the schematic above. Optionally, Valstat ® VR 80 long range DC static eliminating bars are now available for low and high speed applications.