Download (PDF 154 KB): https://research.fs.usda.gov/download/treesearch/32006.pdf
Abstract
We have had the opportunity to subject cross-machine paper strips from two mills to both ultrasound and optical "fiber-orientation" tests to examine the relationships between the results. Both determine an orientation angle, in degrees. Both measure sheet anisotropy as an MD/CD orientation ratio. The optical test has no counterpart to the ultrasonic test’s ability to measure MD and CD tensile stiffness index (TSI). On the other hand, the optical test can measure orientation separately on each side of the sheet, and possibly at several depths, while the ultrasonic test produces measurements characteristic of the bulk value of the sheet.
Keywords
Scientific apparatus and instruments,
optical instruments,
measuring instruments,
anisotropy,
paper,
mechanical properties,
ultrasonic testing,
testing,
orientation,
fibers,
papermaking,
optical measurements,
fiber properties,
pulp,
fiber analysis,
strength,
tensile strength,
stiffness,
microfibril angle,
bond strength
Citation
Vahey, David W.; Considine, John M.; Kahra, Andy; Scotch, Mark. 2008. Comparison of fiber orientation and tensile-stiffness orientation measurements in paper. Proceedings : progress in paper physics seminar, June 2-5, 2008, Helsinki University of Technology (TKK), Espoo, Finland. [Espoo, Finland] : Helsinki University of Technology, [2008]: pages 271-273.
