Resistência da linha de cola de painéis de Pinus taeda colados lateralmente com diferentes adesivos

CERNE

Lopes, Merielen de Carvalho²  Matos, Jorge Luis Monteiro de³  Chinasso, Carlos Augusto Fernandes¹  Muniz, Graciela Inês Bolzon de³  Rosso, Silviana⁴  Tanobe, Valcineide Oliveira de Andrade³ 

[1] Fundação do Meio Ambiente, Blumenau, Brasil$$;Universidade Federal de Pelotas, Pelotas, Brasil$$;Universidade Federal do Paraná, Curitiba, Brasil$$;Universidade Federal do Pampa, São Gabriel, Brasil$$

关键词: Slatted panel;    wood;    bonding.;   

DOI  :  10.1590/S0104-77602013000400011

来源: Universidade Federal de Lavras-UFLA

【 摘 要 】

The study compares the strength of the glue line of edge glued panels of Pinus taeda made with different industrial adhesives. Three types of adhesives (poly(vinyl) acetate (PVAc), emulsion polymer isocyanate (EPI) and polyurethane (PU)) glued in two side gluing orientation (radial and tangential) and analyzed after the conditioning tests (dry and wet) were analyzed. The 360 specimens were prepared for determining the shear strength of edge glued panels of Pinus taeda, and these were tested in a universal testing machine called EMIC. The shear strength of the glue line at dry condition was lower in the tangential side for the three types of adhesives analyzed. The PU adhesive showed the highest values of shear strength in the applied conditions, differing from PVAc and EPI adhesive when tested on dry condition and did not differ from the others adhesives when tested on wet condition. The highest percentage of wood failure was observed after the shear strength test at dry condition to EPI adhesive glued in the radial side. And in the wet condition, the EPI adhesive and PU adhesive glued in tangential side showed higher mean values of wood failure. Thus, it was possible to conclude that the strength of the glue line of Pinus taeda wood was influenced by the type of adhesive and side gluing orientation, and showed differently behavior according to the condition of use (wet or dry).

【 授权许可】

Unknown