The authors introduce newly developed coating and calendaring technologies in our presentation.
Multilayer coating gives a broader coating application window compared to traditional coating methods. It can apply both high coat weights and multiple layers in a single stage. In this way it gives better economy by enabling thicker, less expensive, coating layers for certain paper⁄board properties (bulk, opacity, brightness…) and thinner, more expensive, coating layers for other properties (gloss, barrier…) .
Metal belt calendering gives better surface topography and printability compared to traditional, shorter dwell, calendering methods. The other way round is that it gives the targeted surface properties at higher bulk and stiffness thus saving in the material costs of the paper⁄board manufacturing.
The preliminary research results of combining these new surface treatment processes are promising. It seems to be possible to compensate the less smooth surface produced by contour type multilayer coating by advanced, long dwell, metal belt calendering.
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