Methods for Testing the Resistance of Wood Hotmelt Adhesives to Temperature Changes and Weathering

The paper presents a research on various types of hotmelt adhesives with regard to their temperature resistance and durability. The tested adhesives were based on ethylene/vinyl acetate (EVA); polyamide (PA); polyurethane (PU); and polyolephine (PO), while the adherents were solid beech, 5 mm thick (T-shaped samples); beech veneer, 0.6 mm; PVC strip, 3 mm; paper strip, 0.6 mm; HPL laminate strip, 0.9 mm. The adhesives were comparatively tested with various testing methods for their resistance to weather and temperature change. All adhesives exhibited different characteristics under temperature changes; prolonged higher temperature; and cyclic climatic changes. The aim of the research was to study the bond strength of various edging materials glued with four different hotmelts, with joints exposed to different climatic conditions, and to establish the most suitable methods for the bond strength assessment.