| Abstrak/Abstract |
This aims of this study were to investigate the relationship between non-destructive evaluation (NDE) and
actual bending properties of particleboard, and to predict the bending properties of three-layer particleboard.
Three kinds of raw materials, i.e. Hinoki (Chamaecyparis obtusa Endl.) strand, knife-milled Douglas-fir
(Pseudotsuga manziesii (Mirb) Franco), and hammer-milled matoa (Pometia spp.) obtained from wooden
industry, were utilized as furnish for experimental panel with methylene diphenyl diisocyanate (MDI) resin as
binder. The NDE test was conducted by hit sounds using an FFT analyzer according to the spectrum peak of
wave frequency, while the static bending test was conducted according to JIS A-5908. The results reveal that
the dynamic Young’s modulus as an NDE test has a potential for being used to predict the elastic bending of
particleboards by a specific equation for adjusting its proper values. The values of NDE and static test are
significantly different with a deviation range at 3-20%. The bending stiffness of three-layer particleboards
manufactured from different wood species is predictable by observing the bending stiffness of two elements
based on the thickness of its layers. The predicted values of bending stiffness and static test are significantly
different with a deviation range at 5-24%. |
