SIFAT FISIS DAN MEKANIS ORIENTED STRANDS BOARD (OSB) DARI AKASIA, EKALIPTUS DAN GMELINA BERDIAMETER KECIL : PENGARUH JENIS KAYU DAN MACAM APLIKASI PEREKAT
ABSTRACT: The objectives of
this research were to determine and to compare the physical and mechanical
properties of OSB made of strands from three small diameter fast growing
species, namely Akasia (Acacia mangium
Willd.), Ekaliptus (Eucalyptus sp.), and Gmelina (Gmelina arborea Roxb.). There
were 3 models of OSB produced which bonded by 2 types of adhesive, namely
Phenol Formaldehyda (PF) powder type, isocyanate (IC), and the face and back
layers bonded by powder PF and the core layer bonded by IC. OSB was made
of three plies, with 9 mm target thickness
and ratio of strands weight in face : core : back was 1:1:1. Mat forming
methods in face was lengthwise and the
core was widthwise. Level of adhesive 7% based on oven dry strands weight,
pressed at 25 kg/cm2 for 15 minutes at 160 °C. Japanese Industrial Standard
(JIS) A 5908-2003 for particle board 24-10 type was used as standard. Results
of this research showed generally physical properties consist of density,
moisture content, and thickness swelling fulfilled JIS A 5908-2003 standard.
Unfortunatelly, the dimensional stability should be improved, the range 24
hours water absorption was about 22.35–44.63%. For mechanical properties, which
consist of internal bonding, modulus of rupture (MOR) and modulus of elasticity
(MOE) which be evaluated in dry condition both lengthwise and widthwise
generally fulfilled JIS A 5908-2003 standard. However, there were values
of MOR and MOE which be evaluated in wet
condition both of lengthwise and widthwise did not fulfill JIS A 5908-2003
standard. The best performance of OSB was which bonded by IC for all the wood
species. Using PF powder at the face and back layers and IC in the core layer
of OSB generally increased their physical properties (dimensional stability)
but decreased their mechanical properties.
Keywords: Physical and mechanical properties, OSB, small diameter
fast growing species, adhesive
Penulis: Arif NURYAWAN, Muh.
Yusram MASSIJAYA, Yusuf Sudo HADI
Kode Jurnal: jpkehutanandd080038
