AVALIAÇÃO DAS PROPRIEDADES DE PAINÉIS COMPENSADOS DE Melia azedarach L. PRODUZIDOS COM DIFERENTES GRAMATURAS E TEMPOS DE PRENSAGEM

Trianoski, Rosilani; Iwakiri, Setsuo; Matos, Jorge Luís Monteiro de; Higa, Antônio Rioyei; Braz, Rafael Leite

doi:10.1590/0100-67622015000400019

Cited by 7 publications

(7 citation statements)

References 4 publications

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“…The shear resistance results obtained for all treatments were higher than the values found by Iwakiri et al (2002) for plywood panels of Pinus taeda, produced with urea-formaldehyde resin, with values in the range of 1.06 to 1.57 MPa; and, Iwakiri et al (2011), for plywood panels of Schizolobium amazonicum produced with urea-formaldehyde resin, with grammage of 280 g/m 2 and solids content of 35.8%, whose value obtained for the dry test was 0.77 MPa. On the other hand, the results obtained in this study were lower than those found by Trianoski et al (2015) for plywood panels of Melia azederach, glued with ureaformaldehyde resin, with grammage of 320 g/m 2 and solids content of 58%, whose average values were 2.23 MPa for dry treatment and 2.03 MPa for wet treatment. This difference can be attributed to the higher wood density of Melia azederach L. (0.488 g/cm 3 ), compared to Maquira coriacea (0.380 g/cm 3 ), in addition to the higher grammage used.…”

Section: Resistance To Shear On the Glue Linecontrasting

confidence: 92%

PRODUCTION OF PLYWOOD WITH VENNERS OF Maquira coriacea (Karsten) C.C. Berg

Rojas

Iwakiri

Trianoski

et al. 2020

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Section: Resistance To Shear On the Glue Linecontrasting

confidence: 92%

PRODUCTION OF PLYWOOD WITH VENNERS OF Maquira coriacea (Karsten) C.C. Berg

Rojas

Iwakiri

Trianoski

et al. 2020

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“…In thermally treated woods, Moura et al (2012) verified that there is a higher temperature effect in the modulus of rupture, if compared to the elasticity. On the other hand, in the production of plywood panels, the pressing parameters should be controlled, and adhesives that are appropriate to the characteristics of the veneers and the final panel use should be applied (Iwakiri et al 2012, Trianoski et al 2015.…”

Section: Special Supplement: Bamboomentioning

confidence: 99%

Physical-mechanical properties of laminated bamboo panels

Rusch

Trevisan

Hillig

et al. 2019

Pesqui. Agropecu. Trop.

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Bamboo is a material used on a global scale in several areas. However, it needs adaptation in the processes for industrial use, in Brazil. The production of glued laminated panels has been growing in the world and this material can be a source of resources for this purpose. This study aimed to evaluate the physical-mechanical properties of laminated bamboo panels produced with two species (Phyllostachys aurea and Dendrocalamus asper) and two production processes/adhesives (glued-laminated bamboo and thermo-mechanical laminated bamboo). For the mechanical properties analysis, specimens removed from the panels were subjected to shear tests, Janka hardness and static bending. The same specimens were used to determine the apparent density, moisture content and degree of compression. The apparent density varied between 0.75 g cm-3 and 0.79 g cm-3, with equilibrium moisture contents between 7.83 % and 10.42 %. The highest values for the mechanical properties were verified in the thermo-mechanical laminated process. For D. asper, the modulus of rupture was 146.8 MPa, the shear glued line 6.36 MPa and the Janka hardness 3,852 N, while, for P. aurea, the modulus of elasticity reached 19,603 MPa. It was concluded that the production of bamboo laminated panels, especially using the thermo-mechanical process, can be a potential alternative.

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“…Pedrazzi et al (2006), para painéis de palitos e serragem de Eucalyptus saligna, com ME de 0,65 g/ cm³, 8% de UF e 8 minutos de prensagem, encontraram MOR variando entre 8,4 a 6,2 MPa, respectivamente para palitos e serragem, desempenhos distintos aos do presente trabalho. A diferença entre os tempos de prensagem [8 minutos (PEDRAZZI et al, 2006) e 10 minutos (presente estudo], conforme observado por Trianoski et al (2015), tende a aumentar o grau de polimerização do adesivo com consequente aumento do MOR e do MOE dos painéis.…”

Section: Características Mecânicasunclassified

USO DE <i>Bambusa tuldoides</i> E <i>Eucalyptus grandis</i> PARA CONFECÇÃO DE PAINÉIS AGLOMERADOS

et al. 2018

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RESUMOPainéis formados de bambu podem ser vantajosos quando produzidos com mix de algum tipo de madeira. No entanto, são escassos os estudos utilizando a espécie Bambusa tuldoides que visem produzir painéis uniformes ou combinados com eucalipto. Portanto, o objetivo deste estudo foi avaliar os atributos físico-mecânicos dos painéis confeccionados por distintas percentagens de Bambusa tuldoides e Eucalyptus grandis. Foram produzidos 36 painéis constituídos pela mistura de 0, 25, 50, 75 e 100% (massa seca). Os testes físicos foram umidade das amostras, massa específica, absorção água e o inchamento da espessura. Os testes mecânicos foram extração de parafuso, flexão e tração (ASTM 1037(ASTM , 1999. Os resultados foram analisados por correlação e regressão. Os painéis apresentaram características mecânicas inferiores aos desempenhos mínimos estipulados pela norma. Conclui-se que painéis uniformes de bambu resultaram desempenho superior nos testes físicos aos do eucalipto, que normalmente são utilizados no setor industrial, entretanto, ao aumentar a quantidade de bambu reduziu-se o desempenho nos testes mecânicos. Palavras-chave: bambu; ureia-formaldeído; testes físico-mecânicos; ASTM 1037. ABSTRACTThe bamboo panels particleboards can be advantageous when produced with a mixture of some kinds of wood. However, there are few studies using Bambusa tuldoides for the production of homogeneous particleboards or in combination with wood particles. Therefore, the aim of this study was to evaluate the physical-mechanical quality of particleboard made of different percentages of Bambusa tuldoides and Eucalyptus grandis. To do so, 36 panels were produced composed of a mixture of 0, 25, 50, 75 and 100% of dry matter. The tests realized were moisture, mass density, swelling thickness and water absorption. The mechanical tests were bending, internal bond and screw withdrawal (ASTM 1037(ASTM , 1999. The results submitted to the correlation test and analyzed by regression. The panels did not get the minimum values of the standards (ANSI A 208.1, 1987) for mechanical tests. It is concluded that the homogeneous bamboo panels obtained superior performance in physical tests than the eucalyptus panels, which are usually used in the industrial sector. However, the insertion of bamboo particles impaired the performance of the panels in the mechanical tests.

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AVALIAÇÃO DAS PROPRIEDADES DE PAINÉIS COMPENSADOS DE Melia azedarach L. PRODUZIDOS COM DIFERENTES GRAMATURAS E TEMPOS DE PRENSAGEM

Cited by 7 publications

References 4 publications

PRODUCTION OF PLYWOOD WITH VENNERS OF Maquira coriacea (Karsten) C.C. Berg

PRODUCTION OF PLYWOOD WITH VENNERS OF Maquira coriacea (Karsten) C.C. Berg

Physical-mechanical properties of laminated bamboo panels

USO DE <i>Bambusa tuldoides</i> E <i>Eucalyptus grandis</i> PARA CONFECÇÃO DE PAINÉIS AGLOMERADOS

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