Friction Characteristics between Paper-Webs and Steel Roller (1st Report, Theory)

Abstract

This first report describes the theoretical modeling of friction coefficient between uncoated paper-web (newsprint; for example) and steel roller. In the modeling, the paper base is approximated by the linear spacing and the surface asperities are treated as rigid body. Introducing the contact mechanics and assuming the Gaussian distribution of surface asperities, the mixed friction coefficient is formulated theoretically for a wide range of roller surface velocity, in which the air film thickness between the web and roller is estimated based on the foil bearing model. A comparison between the predicted results and the experimental results will be presented in the second report.