EFEKTIVITAS BEBERAPA PERLAKUAN TERHADAP KAYU KERUING BERMINYAK SEBAGAI BAHAN KAYU LAMINA
ABSTRACT: Appearance of
extractives matter as oil-form on wood surface has been causing problems in
wood working, especially for laminated wood products and finishing. The problem
of extractives on the oily keruing was observed to get the way how to overcome
it so the wood utilization able to be increased by laminated wood
manufacturing. The effect of the treatments on the oily keruing as laminated
wood material has been done by boiling in the water, boiling in diesel fuel and
cooking oil mixture, and press-vacuum with paraffin addition. Comparison was
done for inter-treatment and also to non oily keruing. The materials used were
oily (Dipterocarpus gracilis), non oily (Dipterocarpus grandifloris) keruing
and tannin-base glue. The observed parameters consist of visual appearance,
moisture content, density, bonding strength and delaminating. Results indicated
that moisture content of all treatment were not more than 15%, density range of
0.71-0.91 g/cm3 and average 0.79 g/cm3. The bonding strength of laminated wood
ranges varied from 17.80 kg/cm2 to 37.73 kg/cm2 nd average 26.44 kg/cm2 (dry
testing) and 1.81 kg/cm2-13.97 kg/cm2 and average 9.15 kg/cm2 (wet testing),
while the delaminating ranges of 41.19% to 52.85% and average 45.52%.
Generally, the treatment of boiling in mixture of diesel fuel and cooking oil
with 6 : 1 in proportion, resulted increasing properties for laminated wood
made of oily keruing.
Keywords: Extractives, oily
keruing, tannin, laminated wood
Penulis: Jamaludin MALIK,
Mochamad Isa ISKANDAR
Kode Jurnal: jpkehutanandd090060
