Authors
1 M.Sc., Student of Wood Composites, Gorgan University of Agricultural Science and Natural Resources, Gorgan, Iran.
2 M.Sc., Student of Wood and Paper Science, Tehran University of Natural Resources ,Iran
3 Prof. of Wood and Paper Science, Gorgan University of Agricultural Science and Natural Resources, Department of Wood and Paper Technology. Gorgan, Iran.
Abstract
This study provides an investigation of particleboard manufacture using tannin-urea
formaldehyde adhesive. Test board samples were made with regard to various replacement
percentage of tannin–urea (levels of 0, 10, 20 and 30%) and press time (12 and 15 min) and
their properties were determined. Achieved data were analyzed according to two sides factorial
plan. The results showed that with replacement of 10% urea formaldehyde adhesive by tanninformaldehyde
at both 12 and 15 min pressing times, thickness swelling (after 2 and 24 hours
immersion in water) was decreased while internal bonding increased. There were no significant
effect on MOR and MOE values. In general, the results of present research showed that
replacing the UF resin at lower levels of tannin is suitable as adhesive to manufacture
particleboard so that with replacement ratio of 90:10, the moisture properties of boards were
very close to permissible those of the exterior wood uses.
Keywords
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