Converting

When processing rolls of plastic film and paper – both often coated, it is inevitable that electrostatic charge is generated. Usually the amount of charge is so high that an active discharge is necessary to enable the work processes.

IONTIS products are already being used in subsequent processes for both discharging and charging:

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Slitting

During slitting of film, an anti-static bar can neutralise the occurring charge immediately after the blade roller and thus ensures safe and clean subsequent processing. For the initial winding of the film on the other hand, an applied static charge to the rollers can generate an adhesion without the need to use tape for fixation.

Cross Cutting

In cross-cutting of film, an anti-static bar placed right after the cutter can neutralise occurring charge and prevent problems in subsequent stacking.

Coating & Laminating

Moving web can become charged and need a neutralisation with an anti-static bar before the printing or laminating station in order to ensure safety and productivity.In the coating process, static neutralisation prevents the formation of unwanted structuration on the surface of the varnish.

Lamination e.g. during the melamine coating a systematic application of charge to the surfaces can avoid slippages of the film and layers and also ensure a bubble-free surface even at high speeds.

Label Printing

During printing of labels, static charge on the web can make the applied ink generate contortions in the print pattern but also impact the electronic parts of the printing head, if no static neutralisation is performed prior to printing.

Winding and rewinding

Moving film which becomes charged passing rollers and pulleys needs static neutralisation at the contact/surface and turret winder for a subsequent clean, trouble-free processing and to avoid streaking.However, deliberate systematic charging of the material directly at the turret winder can allow for precise alignment of the edges even of smooth film, an exact fixation at the winders core and a tape-less initial winding of flat film. Additionally a telescoping of the roll can be prevented.

Flowpack & Bag Film Production

The charge generated in the flowpack films production needs to be neutralised via anti-static ionisers, to ensure the bags can be opened later and stacked/placed properly – prior to a reel change however, a deliberate charging of the film tube can ensure better carrying in the subsequent steps.To avoid repulsion of bags from stacks and ensure precise alignment at automatic bag machines, the light-weight plastic material needs to be statically neutralised.

Occurring charge is disturbing at the inlet and vane, but also in placing and stacking at a stapler/wicketer and thus needs neutralising ionisation.

Flexoprint

Built-up electrostatic charge can be removed before printing with antistatic bars and, if necessary, air support to remove disturbing cutting residues and dust.

Pneumatic Transport

Neutralisation via tube ionisation or ring electrode allows for a trouble-free transport of solid parts in tubes with the use of pressurised air (e.g. trim waste and foil remnants at the inlet of cyclones or prior to the mill).

Tipp

Our technical experts deal with electrostatics in industry on a daily basis – benefit from their expertise and let them advise you!

Selected application pictures: