Abstract
Three-ply plywoods were produced using pine and Eucalyptus northeast Argentinian woods. A no-added formaldehyde biobased-adhesive was used for assembly, based on chemically modified soy protein concentrate. In this work we focused on the relationship between bonding quality parameters of the plywoods and the morphology of the glued line. Wood characteristics such as contact angle, roughness, density and moisture content were measured prior to plywood assembly. Bonding quality parameters (percentage of wood failure and shear strength) of the plywood were measured according to Argentinean standard and the results were evaluated with respect to microscopic observations of the glue joint. Eucalyptus wood was suitable for plywood interior condition applications, while pine barely exceeded the standards imposed by the norm.
Highlights
Increased demand of natural resources, mostly wood, have led to the development of new alternative materials for countless industrial applications
Veneer-based products, especially plywoods, which are mostly used for structural applications, are important due to their versatile use and lower cost in comparison to other composite materials (Buddi et al 2017)
We specially focused in the relationship between bonding quality parameters of the plywoods (measured according to IRAM 9562 (2006) standard) and the microscopic observations of the glued joints
Summary
Increased demand of natural resources, mostly wood, have led to the development of new alternative materials for countless industrial applications. Veneer-based products, especially plywoods, which are mostly used for structural applications, are important due to their versatile use and lower cost in comparison to other composite materials (Buddi et al 2017). According to FAO data, the world production of veneer sheets and plywood in 2018 was 163 million m3 and it is expected to rise in the following years (FAO 2018). The following work focuses especially on Eucalyptus (EU) and pine (PI) plywoods using a soy protein concentrate (SPC) based adhesive for the following reasons. Ciencia y tecnología 2022 (24): 3, 1-14
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