On-line tension profile optimization via moisture profile controls on the newsprint papermaking process
Abstract
This paper describes a novel multi-profile control, which can simultaneously optimize both moisture and elongation and/or tension profiles of newsprint grades. The controller can include tension profile measurement [1][2] in its optimization to be able to optimize elongation changes in the newsprint. The relationship between tension, shrinkage and elongation will be explored to enable understanding of how elongation changes can be optimized. Furthermore, differences between tension profile as a property of the papermaking process and as a property of paper will be discussed. This paper also focuses on an implementation of the new multi-profile control system for the newsprint machine. The implementation as well as experiences from the controller are explored, and mill results presented. Additionally, the paper explores what is required from the newsprint machine and the automation to be able to have an elongation and/or tension and moisture optimizing profile controller.
Citation
Kniivila, J. (2001, June). On-line tension profile optimization via moisture profile controls on the newsprint papermaking process. Paper presented at the Sixth International Conference on Web Handling (IWEB), Stillwater, OK.