Conditioning for flatness and antistatic

The task

Top quality and efficiency in paper processing

Paper fibres expand when they absorb moisture and shrink when loosing moisture. This presents a challenge to paper processing. <span>Many processes, such as the production of self-adhesive labels, adhesive tapes, filter paper, sand papers or special papers and many others require drying </span>processes where high temperatures act on the paper. Paper curl, waviness, dimensional changes or static charges occur. The paper must receive its original moisture back to even prevent undesired side effects.

Flatness of the paper

Remoistening after drying processes provides exact flatness and optimal processing conditions, especially for coating and composite materials. The paper remains dimensionally stable, paper curl and waviness are prevented.


The paper cannot be charged when moisture is applied to it. This improves further processing, stoppages and rejects.

The solution

Remoistening via non-contact liquid application

Remoistening with WEKO-Fluid-Application-System (WFA) is effective for conditioning paper. Different systems are available according to the requirements and systems: WEKO-FLOW or WEKO-BASIC each with WEKO-SIGMA rotor carriers. The paper's running and stacking properties are returned by the exactly metered application of micro-droplets. This optimised both production and quality and reduces the reject rate.

The realisation

Paper processing needs WEKO-FLOW or WEKO-BASIC with WEKO-SIGMA

These systems enable you to meet the high requirements of modern paper processing. Via rotors liquid is applied in non-contact application on the paper web. The application volume can be controlled flexibly and very exactly and adapted to high web speeds.

Your benefits

  • Precisely defined application quantity
  • High long-term constancy of liquid quantity and distribution
  • Long periods between maintenance operations
  • Can be integrated in different system topologies
  • Adapted to different web widths
  • Economic consumption of application medium
  • Low energy consumption
  • User-friendly