Bonding performance of Pinus caribaea varieties under different adhesives systems for edge glued panels production
DOI:
https://doi.org/10.22320/s0718221x/2026.20Keywords:
Pinus caribaea varieties, shear strength, wood bonding, wood adhesivesAbstract
The performance of bonded wood products depends on wood properties and adhesive systems, resulting in variability in bonding. Although Pinus caribaea has been introduced in Brazil since the mid-20th century and presents potential for commercial use, there is still a lack of studies evaluating the bonding performance of its different varieties. In particular, comparative analyses of bonding behavior among varieties under different adhesive systems remain limited, especially for industrial applications such as edge glued panels.
In the context, this study evaluated the bonding performance of three Pinus caribaea varieties affects using different adhesive systems (PVAc and EPI), for the production of edge glued panels using Pinus taeda as a reference. Wood samples from three varieties originating from 17- and 18-year-old experimental plantations were characterized in terms of physical and chemical properties according to COPANT and TAPPI standards. Bonding performance was assessed through finger joint (bending and tension) and edge bonding (shear strength) tests using PVAc and EPI adhesives, following ASTM and EN standards, with statistical analysis based on a factorial design.
The results indicated that all varieties of Pinus caribaea exhibited low density, similar to Pinus taeda, although with higher extractive contents. All varieties achieved satisfactory performance in finger joint tests, meeting or exceeding ASTM requirements and showing results comparable to the reference species. In edge bonding, the varieties performed similarly or superiorly to Pinus taeda, with emphasis on the bahamensis variety. The EPI adhesive showed superior performance compared to PVAc.
These findings demonstrate that intra-species variability does not limit bonding performance and confirm the technical feasibility of using Pinus caribaea varieties in the production of edge glued panels. The results contribute to expanding the industrial applicability of this species, supporting its use as an alternative raw material in the wood products sector.
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