Ozone, Generated at Corona Treater, as an Adhesion Promoter in Extrusion Coating, 1994 Polymers, Laminations & Coating Conference Proceedings
J. Kuusipalo, A. Savolainen
The trials were done with a pilot coextrusion coating line at the Institute of Paper Converting Technology (Tampere University of Technology, Finland). The reason for this study was to test the ozonization-system we had built in our pilot-line to treat the polymer melt in extrusion coating. The effect of the ozone, generated at corona treater, on adhesion was studied. The ozone was lead to an air knife nearby the air gap, and blowed against the polymer melt. The measured adhesion performed as an indicator in showing the usefulness of this technique. A few parameters were varied in order to find out the effectiveness: substrate, line speed, coatweight, and melt temperature. Naturally the thicker the coating, the better the adhesion was. Also the increase of the melt temperature improved the adhesion, as expected. The ozone (generated at corona) improved remarkably adhesion, compared to only corona or not treated samples.
Ozone, Generated at Corona Treater, as an Adhesion Promoter in Extrusion Coating, 1994 Polymers, Lam
