Static charges are observed on duplex rewinders in narrow web and wide web printing. Printed film acquires static charges due to contact and separation from idler rollers and die cutters, which can be as high as 30 kV or more. To eliminate static charges from the film when wound on the rewinder and enhance quality, avoid operator shocks, and mitigate fire risk, Valstat VR 20/VR 80 active AC and DC static discharging bars are recommended for installation on the rewinders. The bars eliminate static charges over a range of up to 600 mm, making them well-suited for this application.

1. VALENCE ELECTRONS PRIVATE LIMITED
32 K R Colony, Domlur Layout, Bangalore 560 071, India
T: +91-80-4125 6570
E: contact@valence.in W: www.ategroup.com/valence
Registered Office: 43 Dr V B Gandhi Marg, Fort, Mumbai 400 023, India
CIN: U74999MH2000PTC127595
Application note
Published date: 10-01-2017 | Rev: 1A
Page 1
Static charges on slitter and duplex rewinder
Problem
Electrostatic charges are observed on duplex rewinders in narrow web and wide web printing. Printed film
acquires static charges due to contact and separation from idler rollers and die cutters. The static charges can
be as high as 30 kV, or more. It is essential to eliminate the static charges from the film at the time it is wound
on the rewinder in order to enhance quality, avoid shocks to operator and mitigate the risk of spark / fire.
Solution
Valstat
®
VR 20 / VR 80 active AC and DC static discharging bars are recommended on the rewinders as
shown above. The AC and DC static eliminating bars provide the advantage of eliminating the static charges
with ranges up to 600 mm and hence are ideally suited for this application.