THERMAL SPRAY COATINGS REDUCE WEAR AND CORROSION ON CALENDER ROLLS

Thermal spray coatings resist surface degradation on calender rolls an d therefore provide improved, more consistent paper quality. Extended roll change intervals resulting from coating use reduce costs. Laborat ory tests and actual performance data influence coating selection for specific calender applications. Certain coatings have the superior cha racteristics needed to perform well in hard-nip, soft-nip, and superca lender stacks. Considerable experience shows that coated calender roll s provide improved sheet profile and finish to enhance runnability and print quality.