Effects of different pressing conditions on properties of spruce plywoods
P. Král, J. Hrázskýhttps://doi.org/10.17221/4510-JFSCitation:Král P., Hrázský J. (2006): Effects of different pressing conditions on properties of spruce plywoods. J. For. Sci., 52: 285-292.
The paper presents results of an institutional research aimed at assessing the effect of different technological conditions in pressing on physical and mechanical properties of plywood sheets. Spruce plywood sheets of the veneer nominal thickness of 3.0 and 3.5 mm were analyzed. The plywood sheets were produced as five-ply and BAKELITE PF B118 phenol-formaldehyde adhesives were used for there manufacture. In relation to a different pressing temperature 115, 120 and 125°C and a different specific pressure, density, bending strength, MOE in bending and glue-bond strength by a shear test were assessed. The determined values of properties were statistically tested.Keywords:
plywood; plywood density; bending strength; MOE in bending; pressing temperature; statistic analysis