The Effects of Flame Treatment on Clay Coated Paperboard in Extrusion Coating, 2006 PLACE Conference

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The target was to study the adhesion between extrusion coated PE-LD and clay coated paperboard, where flame and corona were used as pretreatments. The focus was to find out the influence of following flame treatment parameters: gas rate, air-gas ratio, burner vs. substrate distance. Test trials were carried out in extrusion coating pilot lines at TUT (Tampere University of Technology), Finland and Innovene in Dormagen, Germany. The results showed how strongly the flame treatment parameters are affecting adhesion and what are the optimum value ranges and combination of parameters. The effect of flame and corona treatments on adhesion was established to be equal, whereas the mechanisms seem to be partly different. Based on the whole series of trials, a model to predict adhesion was created, and it will be tested at production lines in the near future.