Success of Wood Veneers Influenced by Harvesting Season and Temperature: Plywood Performance and Failure: A New Understanding
Wood veneers are used widely in making plywood, engineered wood flooring, and furniture; however, little is known about how harvesting and processing it affect the quality of the veneer for wood bonding. A joint study between the the Forest Service's Forest Products Laboratory and Aalto University in Finland revealed that the season of logging and the temperature of the log when veneers are peeled off have a significant impact on the surface quality of the veneer and the strength of the glue joints that attach it to another material. The study also showed the results in some standard adhesive performance tests are highly dependent on the size and orientation of veneer checks (cracks that form during peeling). Current tests are not evaluating the adhesive as intended and decisions are being made based on unreliable information. The research results also describe how to conduct the tests in a much more reliable way.
Forest Service Partners