The properties were measured after reaching equilibrium moisture contents in 50 and 90 percent relative
humidity environments. The results show panels made from recycled corrugated containers at both humidity levels were 10 to
20 percent stronger and stiffer than those made from lodgepole pine. Tensile energy absorption was also measured and showed
that panels made from old corrugated containers could absorb about 200 percent more energy than the lodgepole pine panels.
Tensile stress and strain plots graphically show the difference between the fiber types and processing methods, especially the
higher strain at failure for the recycled corrugated container panels. Panels from both fiber sources surpassed minimum com
mercial hardboard standards. The results showed alternative fibers could be used to produce strong and stiff panels. This research
is part of a larger program for developing an understanding of panel properties for engineered three-dimensional fiberboard
products.