| Summary: | The forest area of Papua Province area of 40,487,130.09 acres or 95% of the total
land area is a potential producer of merbau (Intsia bijuga) and opportunity to be
utilized optimally as an asset for local revenues, both from its function as a
protected area or a combination of conservation for production interests.
The purpose of this study is to investigate the effect of optimization levels
of urea formaldehyde adhesive 6%, 8%, 10% and 12% with particle size merbau
wood waste 2 mm sieve, and a 5 mm sieve but retained on the sieve of 2 mm,
against nature physical and mechanical particle board.
This study used a factorial method which consists of two factors. The first
factor had four levels of treatment that is gluten content of 6% (P1), 8% (P2), 10%
(P3) and 12% (P4) and the second factor has two levels of treatment that is the
size of particles that escape the 2 mm sieve size (U1) and the particles that pass in
the 5 mm sieve but retained on sieve size of 2 mm (U2), which is arranged in
complete randomized design (CRD) and repeated three times. The tested physical
properties of density, water absorption, development of thick, were tested for
mechanical properties of tensile strength perpendicular / internal bonding (IB),
modulus of elasticity (MOE) and modulus of rupture (MOR).
The observation was analyzed by ANOVA (analysis of variance) at 5%
significance level with the application of SPSS (Statistical Package for Social
Sciences), the results obtained showed that the larger particle size and greater
number of adhesive will significantly affect the physical and mechanical
properties of boards particles. The best properties are generally owned by a
particle board with adhesive content of 12% with merbau wood particle
composition with size caught in the sieve of 2 mm and 5 mm sieve pass on
(U2.P4).The highest density of 0.744 g/cm3, the highest water absorption of
37.88%, the highest thick development of 0.607%, Internal bonding 4.547 kg / cm
², fracture modulus 99,695 kg / cm ², modulus elastis12.648, 62 kg / cm ².
The larger particle size will be more dense, water-resistant, increase
density, reduce the absorption of water and heavy development and to improve the
mechanical properties of particle board. More and more the amount of adhesive
physical and mechanical properties of particle board, the better.
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