Evaluación de tres adhesivos en la fabricación de tableros enlistonados de Aspidosperma quebracho blanco estabilizado con polietilenglicol

this study analyzed what type of adhesive is most suitable for use in the manufacture of aspidosperma quebracho-blanco wood blockboards impregnated with polyethylene glycol (peg). three types of adhesives that could potentially be used to form the boards were analyzed: polyvinyl acetate (pvac), urea-formaldehyde (uf) and phenol-formaldehyde (pf). bond quality was determined by the glue-line strength in boards made with impregnated and non-impregnated wood. the use of peg as a stabilizer of aspidosperma quebracho-blanco wood did not interfere in the adhesion process when uf and pf adhesives were tested. the pvac adhesive decreased (<15%) the resistance of the glue line in comparison with the non-impregnated wood. the adhesive that performed the best according to the spanish standard une 56-777-92, pertaining to the determination of glue-line strength, was the uf one. the pvac and pf adhesives failed to reach the minimum specifications of 10 nmm-2 even in those boards manufactured with non-impregnated wood.