KARAKTERISTIK ORIENTED STRAND BOAR BERDASARKAN PENYUSUNAN ARAH STRAND
ABSTRACT: The research
objectives are to evaluate physical and mechanical properties of OSB based on
strand orientations made from akasia wood (Acacia mangium Wild) and afrika wood
(Maesopsis eminii Engl). Akasia and afrika wood are used for OSB strand
material with phenol formaldehyde (PF) as adhesives and addition of paraffin.
OSB made in this research consists of three plies whereas are differed into
eight strand orientations. Hot press was
carried out at 160ºC and pressure 25 kg/cm² for 15 minutes. Determination of
OSB physical and mechanical properties referred to JIS A 5908-2003. Result
showed that strand orientations have not affected to OSB physical properties
except for linear swelling 24 h, but it significantly influences all mechanical
properties of OSB. Wood species has an effect on mechanical properties of OSB
in the dry test, wet MOE lengthwise test and OSB physical properties,
particularly to OSB density and water absorbing capability at 2 h and 24
h. All of OSB physical properties are
meet JIS A 5908-2003 standard, but not all of the mechanical properties such as
dry MOE lengthwise, dry MOE and MOR widthwise. The best physical and mechanical
properties is presented by OSB made from akasia wood in strand orientation F
(core layer is orientated and surface layers are in random, R°/0°/R°), G (core
layer is orientated 45° and surface layers are in random, R°/45°/R°), B
(surface strand direction is upright to core strand direction, 0°/90º/0°), and
C (core layer is in random, surface layers are orientated, 0°/R/0°) whereas all
parameters meet JIS A 5908-2003 standard. In comparation with strand
orientation B that is frequent used in industry, strand orientation F and G are
proficient to raise the modulus elasticity value (MOE) and strength (MOR) as
much as 167.8-231.7% and 89.7-109.9%, respectively; especially in widthwise
board application. Furthermore, strand orientation F and G are more flexible as
structural components.
Keywords: Oriented strand
board, strand orientation, phenol formaldehyde
Penulis: NURHAIDA, Naresworo
NUGROHO, Dede HERMAWAN
Kode Jurnal: jpkehutanandd080042
