RESUMENEn este trabajo se evaluó que tipo de adhesivo es factible de utilizar en la fabricación de tableros enlistonados de madera de Aspidosperma quebracho-blanco impregnada con polietilengliol (PEG). Se analizaron tres tipos de adhesivos: polivinil acetato (PVAc), urea-formaldehído (UF) y fenol-formaldehído (PF) para conformar los tableros. La calidad adhesiva se determinó mediante la resistencia de la línea de adhesivo en tableros fabricados con madera impregnada y sin impregnar. El uso de PEG como estabilizante de la madera de Aspidosperma quebracho-blanco no interfirió en el proceso de adhesión cuando se utilizaron adhesivos UF y PF. Con el adhesivo PVAc provocó una disminución (< 15 %) de la resistencia en la línea de adhesivo respecto de la madera sin impregnar. El adhesivo que mejor se comportó de acuerdo a la Norma Española UNE 56-777-92. Determinación de la resistencia en la línea de adhesivo, fue el UF. Los adhesivos PVAc y PF no lograron pasar las especificaciones mínimas de 10 N·mm -2 aún en los tableros fabricados con madera sin impregnar. ABSTRACTThis 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 N·mm -2 even in those boards manufactured with non-impregnated wood.
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