Sheet adhesion on press roll materials

This paper reviews some fundamental factors influencing web release phenomena and sheet release properties of new roll cover materials compared with granite. The comparison includes ceramic and rubber materials. Static contact angle measurements evaluated the surface energies of the press talls and their companents. Static sheet release experiments used furnish composition, pH, and chemicals as variables. Application : evaluation of surface energies is a good beginning for the development of alternate roll materials. A wet peel tester allows the study of effects of pulp furnish, retention aids, fillers, etc.