Effect of Board Type on Some Properties of Bamboo Strandboard

Abstract

Abstract. The objective of this study was to evaluate the properties of bamboo strandboard (OSB) by comparing different board types and strand-lengths. Bamboo strandboards with nominal dimensions of 37 mm by 37 mm by 12 mm and target density 0.65 g/cm 3 were manufactured using moso bamboo (Pyllostachys pubescent Mezel) and MDI resin to produce two types of strandlength. Two types of strand length and MDI resin were used to produce three types of strandboard. The bending properties and dimensional stability of the strandboards were evaluated according to the Japanese Industrial Standard (JIS) for particleboard. The results of this experiment indicate that the bending properties and internal bond strength were affected by both board type and strand-length. The distribution of resin inside the 80 mm strandboard was less homogenous than in the 50 mm strandboard, which affects the internal bond strength. Thickness swelling of the RAND board was the highest and linear stability was affected substantially by strand alignment. The RAND board and cross-oriented 3LAY board effectively restrained linear expansion in the direction perpendicular to the strand alignment. A cross-oriented core may be the most effective way to reduce dimensional change and bending property values in perpendicular directions.

Comparison of the flexural behavior of natural and thermo-hydro-mechanically densified Moso bamboo

“…Bamboo oriented strand board (OSB) is an additional product, which to an extent combines the mechanical efficiency (specific stiffness and specific strength) of the natural bamboo tissue with high material use efficiency (Semple et al 2015b). While there have been several studies regarding bamboo OSB fabrication and properties (Lee et al 1996;Sumardi et al 2007Sumardi et al , 2015Semple et al 2015b, c, d), bamboo OSB has yet to be fully commercialized (Semple et al 2015c,b). For many composite wood products, an important aspect of their processing is densification, which occurs as a secondary effect during the hot-pressing operation needed for thermosetting adhesives (Kamke and Casey 1988;Wolcott et al 1994;Winistorfer et al 2000).…”