Properties of Plywood Produced with Rubberwood Veneer and Urea-formaldehyde Adhesive Added Borax

Main Article Content

Wissanee Yingprasert
Rossana Suhansa

Abstract

This study evaluated the effects of adding borax to urea-formaldehyde (UF) adhesive, with increasing percentage content of 5%, 10%, and 15% w/w of the solid content of adhesive, on the adhesive properties. White rot (Trametes versicolor) and brown rot (Gloeophyllum striatum) resistance, subterranean termite (Coptotermes gestroi) resistance, formaldehyde emission content, and shear strength of rubberwood plywood produced with borax added UF resin at various percentages was also determined. Its properties were compared with rubberwood plywood produced with a UF adhesive. The results indicated that the addition of borax to UF adhesive decreased the pH of adhesive in alkaline conditions. Borax addition to UF adhesive at a sufficient percentage (10-15% w/w of the solid content of adhesive) decreased the gel time of UF adhesive. Formaldehyde emission of rubberwood plywood produced with the borax added UF adhesive from 10-15% w/w of the solid content of adhesive decreased. Resistance to white and brown rots and subterranean termite resistance of rubberwood plywood produced with UF adhesive with added borax (10-15% w/w of the solid content of adhesive) was seen to improve. Moreover, the addition of borax at 15% w/w of the solid content of UF adhesive also enhanced the shear strength of the plywood.

Article Details

How to Cite
Yingprasert, W., & Suhansa, R. (2020). Properties of Plywood Produced with Rubberwood Veneer and Urea-formaldehyde Adhesive Added Borax. Thai Journal of Forestry, 39(1), 191–202. Retrieved from https://li01.tci-thaijo.org/index.php/tjf/article/view/246006
Section
Original Articles

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