Untersuchungen zur Verteilung des Klebstoffes im Bereich der Leimfuge mittels Neutronenradiographie und Mikroskopie

The permeation behaviour of different types of adhesives (urea-formaldehyde resin, dispersion glue (PVA) and Polyurethane) was investigated by light microscopy, scanning electron microscopy and neutron radiography. Clear differences in the permeation behaviour of the adhesives could be determined. Urea resin showed under the chosen conditions the strongest permeation of wood. The glue allocation was quantified and the permeation visualised by means of neutron radiography. By this a differentiation between wood and the glue joint was possible. The penetration depth of the glue was conspicuously different between spring wood and late wood areas.