INFLUÊNCIAS DA ESPÉCIE, TRATAMENTO PRESERVATIVO E ADESIVOS NAS PROPRIEDADES FÍSICAS DO BAMBU LAMINADO COLADO

• Main Authors: Rafael Amorim Rosa, Juarez Benigno Paes, Pedro Gutemberg de Alcântara Segundinho, Graziela Baptista Vidaurre, Ana Karla Freire de Oliveira
• Format: Article
• Language: Portuguese
• Published: Universidade Federal de Santa Maria 2016-01-01
• Series: Ciência Florestal
• Online Access: http://www.redalyc.org/articulo.oa?id=53447685019

ABSTRACT 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 older than three years were produced cross-linked polyvinil acetate (PVAc) the other in solution of disodium octaborate tetrahydrate (Na 2 B 8 O 13 4H 2 O) - 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.