Influence of cold tack properties on bond performance of cured urea–formaldehyde resin

Urea–formaldehyde resins are capable of forming cold tack, which is needed in plywood production. Cold tack is influenced by various factors such as veneer moisture content, veneer temperature, and pre-press time. Tensile shear strength and wood failure percentage of bonded birch veneers were examined. Based on statistical analyses, it was concluded that the factors influencing cold tack do not significantly influence the performance of the cured bond line.