In this work z-directional moisture and temperature profile of fine paper was studied. Paper samples had different drying boundary conditions. Goal was to find out differences arising from drying conditions that can be used in papermaking. Paper temperature and moisture during drying was changed using different impingement drying parameters to the paper on a small scale drying device. A near-infrared spectroscopic method and measurement system for moisture depth profiling was used to measure moisture and thermocouples were used to measure temperatures in the thickness direction. Results measured were also supported by simulations using simulation software developed earlier. This study shows that during paper drying there exists great differences in z-directional moisture profiles that are up to 25-35% in moisture content, depending on the drying conditions. This difference is seen in measurements and also simulations.
|Title of host publication||Progress in Paper Physics Seminar PPPS 2008|
|Publisher||Helsinki University of Technology|
|Publication status||Published - 2 Jun 2008|
|MoE publication type||Not Eligible|
|Event||Progress in Paper Physics Seminar, PPPS 2008 - Espoo, Finland|
Duration: 2 Jun 2008 → 5 Jun 2008
|Seminar||Progress in Paper Physics Seminar, PPPS 2008|
|Period||2/06/08 → 5/06/08|
Keränen, J., Paaso, J., Timofeev, O., & Kiiskinen, H. (2008). Moisture and temperature measurement of paper in thickness direction (Supported by simulations). In Progress in Paper Physics Seminar PPPS 2008 (pp. 207-210). Helsinki University of Technology.