2.2. Determination of IB strength
The fabricated Eremurus–Rhizophora spp. particleboards
were cut into 5 cm 5 cm pieces to determine the IB
according to the Japanese Industrial Standard for particleboards
(JIS, A5908). The IBs of nine samples from each of
the six fabricated particleboards were measured by UTM-
5582: Instron Testing System (USA) with a load cell capacity
of 1000 kg. The particleboard sample was loaded on both
sides at a loading rate of 2 mm/min [16] until the appearance
of fracture, which had to occur in the middle of the
sample. The IB tester system gave a curve for each sample
that showed a maximum load at fracture time (Pmax). The
IB in MPa is calculated by dividing the maximum load
per area of the board sample surface.
2.3. Evaluation of WA and TS
The WA and TS tests were carried out to evaluate the
dimensional stability of the fabricated Eremurus–Rhizophora
spp. particleboards according to the Japanese Industrial
Standard for particleboards [16]. The dimensional stability
increased with decreased WA and TS values [28]. Initial thickness (T0) and weight (W0) were measured in samples
with sizes of in 3 cm 3 cm. Then, the samples were submerged
in distilled water at room temperature. The thickness
(T) and weight (W) of the samples were re-measured
at specific times up to 24 h. WA and TS calculations are
shown in Eqs. (2) and (3), respectively:
Table 1
The required calculation of particleboard fabrication.
% Adh.: percentage of adhesive treatment level; R. PS.: Rhizophora spp. particle size; E.: Eremurus spp. root; R.: Rhizophora spp.; MC: moisture content, Add.
W.: adding water; F. PB.: fabricated particleboard.