Bagginess and baggy streaks: A novel measurement technique to quantify tension profile of a web in cross-direction at high resolution
Abstract
A tension beam was designed to quantify cross-directional tension profile of a moving web at high resolution and high accuracy. The beam, composed of 50 individual Teflon pads resting on load cells, allows the measurement of the tension profile of a 1270 mm wide web. The tension beam was installed on a roll tester machine that has the capabilities of unwinding large roll. A method to evaluate the tension profile of a full width machine from individual rolls was also developed. Over the past years, the beam was used to test different types of material, from lightweight paper to polymer films, airlaid material and paperboard. Tension analysis showed that cross-directional tension profiles may vary a lot for different web conditions. Examples of non-uniform tension profiles on paper machines related to cross-directional properties variations are illustrated. Models that predict the cross-directional tension profile of as full machine width from basic web properties can also be established using the tension beam.
Citation
Parent, F., & Hamel, J. (2011, June). Bagginess and baggy streaks: A novel measurement technique to quantify tension profile of a web in cross-direction at high resolution. Paper presented at the Eleventh International Conference on Web Handling (IWEB), Stillwater, OK.