Potential Precautions

Elektrostatic charge cannot be seen, but maybe you have already witnessed some impact and damages. We explain, what methods and precautions you can apply, to tackle electrostatic issues in general. These explanations however, cannot substitute our experts’ knowledge and an analysis at your premises by our domain experts.
It ususally makes sense to combine several of the listed precautions and measures. Our domain experts in the field can provide you with professional advice.

 

The measures and precautions in the following table are sorted ascendingly for their effect (i.e. in average achievable residual charge by experience).

Effect Measure Pros Cons
Reduction of contact surfaces
  • Avoid deflection (pulleys)
  • Increase surface roughness
  • No to low capital investment
  • Ease of implementation
  • Bigger change to work process required
  • Usually limited potential/possibility to do this
Reduction of contact pressure
  • Change contact pressure (e.g. on impression roller)
  • Change web tension
  • No capital investment
  • Ease of implementation
  • Bigger change to work process required
Reduction of separation speed
  • Change of web speed
  • No investment
  • Ease of implementation
  • Reduces machine productivity
Increase conductivity of environment
  • Increase air moisture
  • From 55-65% moisture upwards usually very low static charges
  • Not always feasible
  • Requires additional investment
Increase conductivity of both contact partner
  • Change of material e.g. roller surfaces
  • Addition of conductible matter (z.B. metal dust) to material
  • Eliminating cause
  • Sustainable measure
  • 1: Usually no complete elimination
  • 2: Changes material consistence
Passive Ionisation
  • Cost-efficient
  • Eliminate shocks to Personnel
  • Considerable residual charges remain (up to 3000V)
Increase surface conductivity
  • No change of material consistence
  • Effect with certain sustainability
  • Needs proper application (manual coating or immersion bath)
  • Increases cost per unit
  • in part not allowed (food, pharma)
Ionisation
  • Most efficient method
  • Base work task needs no change
  • Requires investment