INFLUENCES OF SPECIES, PRESERVATIVE TREATMENT AND ADHESIVES ON PHYSICAL PROPERTIES OF LAMINATED BAMBOO LUMBER

• Autor(a) principal: Rosa, Rafael Amorim
• Data de Publicação: 2016
• Outros Autores: Paes, Juarez Benigno, Segundinho, Pedro Gutemberg de Alcântara, Vidaurre, Graziela Baptista, Oliveira, Ana Karla Freire de
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Ciência Florestal (Online)
• Texto Completo: https://periodicos.ufsm.br/cienciaflorestal/article/view/24220
• topic: Dendrocalamus giganteus; Bambusa vulgaris; adhesives; physical characterization.; Dendrocalamus giganteus; Bambusa vulgaris; adesivos; caracterização física.

This work aimed to evaluate the physical properties of laminated bamboo lumber - LBL in relation to species, preservative treatments and adhesive employed. Laths of Dendrocalamus giganteus and Bambusa vulgaris bamboos with over the age of three years old were produced. Some of the laths were immersed in water and the other in solution of disodium octaborate tetrahydrate (Na2B8O134H2O) - Timbor, with 2% concentration, during 15 days. After treated and air season, the laths were transformed into strips with dimensions of 0.5 x 3.0 x 45 cm (thickness x width x length) and employed in the manufacture of laminated bamboo lumbers. The adhesives used for gluing the strips were the basis of polymer isocyanate emulsion (PIE), melamine urea formaldehyde (MUF), polyvinyl acetate cross (PVAc) and resorcinol formaldehyde (RF). The preservative treatments and the adhesives did not influence the densities of LBLs manufactured with Dendrocalamus giganteus. For the Bambusa vulgaris, the densities of LBLs were affected by the type of adhesive. It was observed that the LBLs manufactured with Dendrocalamus giganteus had a higher dimensional stability than those produced with the Bambusa vulgaris. The MUF and RF adhesives have given greater dimensional stability to the BLCs produced with both species of bamboo. The LBLs adhered with EPI or PVA had greater delamination, regardless the species of bamboo and the preservative treatment, not being suitable for external uses.