applied sciences Article Bonding of Selected Hardwoods with PVAc Adhesive Ján Iždinský 1,* , Ladislav Reinprecht 1 ,Ján Sedliaˇcik 2, Jozef Kúdela 3 and Viera Kuˇcerová 4 1 Department of Wood Technology, Faculty of Wood Science and Technology, Technical University in Zvolen, T. G. Masaryka 24, 960 01 Zvolen, Slovakia;
[email protected] 2 Department of Furniture and Wood Products, Faculty of Wood Science and Technology, Technical University in Zvolen, T. G. Masaryka 24, 960 01 Zvolen, Slovakia;
[email protected] 3 Department of Wood Science, Faculty of Wood Science and Technology, Technical University in Zvolen, T. G. Masaryka 24, 960 01 Zvolen, Slovakia;
[email protected] 4 Department of Chemistry and Chemical Technology, Faculty of Wood Science and Technology, Technical University in Zvolen, T. G. Masaryka 24, 960 01 Zvolen, Slovakia;
[email protected] * Correspondence:
[email protected]; Tel.: +421-455-206-385 Abstract: The bonding of wood with assembly adhesives is crucial for manufacturing wood com- posites, such as solid wood panels, glulam, furniture parts, and sport and musical instruments. This work investigates 13 hardwoods—bangkirai, beech, black locust, bubinga, ipé, iroko, maçaran- duba, meranti, oak, palisander, sapelli, wengé and zebrano—and analyzes the impact of their selected structural and physical characteristics (e.g., the density, cold water extract, pH value, roughness, and wettability) on the adhesion strength with the polyvinyl acetate (PVAc) adhesive Multibond SK8. The adhesion strength of the bonded hardwoods, determined by the standard EN 205, ranged in the dry state from 9.5 MPa to 17.2 MPa, from 0.6 MPa to 2.6 MPa in the wet state, and from 8.5 MPa to 19.2 MPa in the reconditioned state.