AVALIAÇÃO DA QUALIDADE DE PAINÉIS COMPENSADOS PRODUZIDOS COM LÂMINAS DE MADEIRA DE Schizolobium amazonicum

Iwakiri, Setsuo; Vargas, Carlos; Parchen, Carlos Frederico Alice; Weber, Cristiane; Batista, Cilene Cristina; Garbe, Ernesto Augusto; Cit, Everilton José; Prata, José Guilherme

doi:10.5380/rf.v41i3.23991

Cited by 19 publications

(21 citation statements)

References 2 publications

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“…As regards the results reported in literature, Iwakiri et al(2011), studying phenolic plywood of Schizolobium amazonicum (Paricá), verified parallel and perpendicular MOR values respectively from 21 to 32 MPa and from 12 to 17 MPa. Parallel and perpendicular MOE for the same species was verified to be respectively from 3.965 to 5.279 MPa and from 1.165 to 1.623 MPa.…”

Section: Chemical and Physical Properties Of Woodsupporting

confidence: 68%

“…Pinto (2001) evaluated the lamination yield and plywood quality of Criptomeria japônica ;Bortoleto Jr. and Belini (2002) studied the behavior of Schizolobium parayba wood in plywood production; and, Iwakiri et al (2011) evaluated the quality of plywood produced with veneers made of Schizolobium amazonicum. Despite the low wood density of these species, researchers recognized indicators of their potential for the use in veneers and plywood production.…”

Section: Introductionmentioning

confidence: 99%

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QUALITY OF PLYWOODS OBTAINED FROM Melia azedarach COMBINED WITH Pinus taeda, PRODUCED WITH UREA-FORMALDEHYDE AND PHENOL-FORMALDEHYDE RESINS

Iwakiri¹,

Trianoski²,

Castro³

et al. 2013

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This study was developed to evaluate the quality of plywood produced from Melia azedarach in combination with Pinus taeda, glued with urea-formaldehyde resin (UF) and phenol formaldehyde (PF). Panels were produced using five veneers of Melia azedarach only, five veneers of Pinus taeda and also with faces made of Melia azedarach and core with Pinus taeda. The panels were evaluated by glue line shear tests and by static bending in parallel and perpendicular directions. The higher contents of extractives in Melia azedarach wood did not reduce the glue line shear strength between the layers. For both UF and PF glues, panels produced with veneers of Melia azedarach showed better results on static bending and glue line shear tests. The results indicate great potential of Melia azedarach wood in plywood production, both for internal use (UF), and for external use (PF).

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Section: Chemical and Physical Properties Of Woodsupporting

confidence: 68%

Section: Introductionmentioning

confidence: 99%

QUALITY OF PLYWOODS OBTAINED FROM Melia azedarach COMBINED WITH Pinus taeda, PRODUCED WITH UREA-FORMALDEHYDE AND PHENOL-FORMALDEHYDE RESINS

Iwakiri¹,

Trianoski²,

Castro³

et al. 2013

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“…Na comparação com os valores referenciais apresentados na literatura, os resultados de RLC teste seco obtidos nesta pesquisa foram superiores aos valores médios obtidos por Iwakiri et al (2011), na faixa de 0,72 a 0,94 MPa, para painéis compensados de Schizolobium amazonicum Huber ex. (paricá) produzidos com resina ureia-formaldeído.…”

Section: Resistência Da Linha De Cola àS Tensões De Cisalhamentounclassified

“…Blake para produção de compensados; e Iwakiri et al (2011) avaliaram a qualidade de painéis compensados produzidos com lâminas de Schizolobium amazonicum Huber ex. Apesar da baixa densidade da madeira dessas espécies, os pesquisadores encontraram resultados que indicam o seu potencial para produção de lâminas e compensados.…”

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PRODUÇÃO DE PAINÉIS COMPENSADOS COM LÂMINAS DE MADEIRA DE Sequoia sempervirens E RESINA UREIA-FORMALDEÍDO

Iwakiri

Cunha

Prata

et al. 2012

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ResumoEsta pesquisa teve por objetivo avaliar a qualidade dos painéis compensados multilaminados produzidos com lâminas de madeira de Sequoia sempervirens (D. Don) Endl. Foram produzidos em laboratório compensados com cinco lâminas de 2,0 mm de espessura, colados com resina ureia-formaldeído (UF), com duas diferentes formulações de batida de cola e gramaturas. Os painéis foram prensados com pressão específica de 10 kgf/cm², temperatura de 110 ºC e tempo de prensagem de 10 minutos. Foram avaliadas as propriedades de resistência da linha de cola aos esforços de cisalhamento (RLC) e flexão estática paralelo e perpendicular (MOE e MOR). De uma forma geral, as diferentes formulações da batida de cola e gramaturas não afetaram significativamente os resultados das propriedades dos painéis, o que representa um aspecto importante sob o ponto de vista econômico. Os valores médios de RLC e percentagem de falhas na madeira atendem aos requisitos mínimos da norma EN 314-2 (1993). Os resultados obtidos nesta pesquisa indicam a possibilidade de uso de lâminas de sequoia para o miolo de painéis compensados para uso interior e de forma associada com lâminas de espécies com maior resistência mecânica nas capas. Palavras-chave: Lâminas de madeira; sequoia; compensado; ureia-formaldeído. Abstract Production of plywood using veneers of Sequoia sempervirens and urea-formaldehyde resin.This research was carried out to evaluate the quality of plywood made from wood veneer of Sequoia sempervirens. It was produced in laboratory plywood composed by five veneers with 2.0 mm thick, bonded with urea-formaldehyde resin (UF) with two different formulations of glue and amount of glue spread. The panels were pressed with specific pressure of 10 kgf/cm², temperature of 110 °C and pressing time of 10 minutes. It was evaluated the properties of the glue line shear strength (RLC) and static bending (MOE and MOR) parallel and perpendicular. In general, the different adhesive formulations and amount of spread glue did not significantly affect the results of the properties of the panels, which represent an important aspect on the economic point of view. The mean values of RLC and percentage of wood failure meet minimum requirements of standard EN 314-2 (1993). The results of this research revealed the possibility to using the veneers of sequóia for the core of internal use plywood associated with greater strength species on the faces.

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“…The production of multi-laminated plywood using Sequoia sempervirens wood veneers was studied by Iwakiri et al (2013) and the quality of plywood made of Schizolobium amazonicum Huber ex veneers was evaluated by Iwakiri et al (2011). Hevea brasiliensis veneers were used by Palma, Escobar, Ballarin and Leonello (2012).…”

Section: Introductionmentioning

confidence: 99%

Properties of multi-laminated plywood produced with Hovenia dulcis Thunb. and Pinus elliottii wood under different pressing pressures

et al. 2017

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ABSTRACT. This study aimed at evaluating the effect of different pressing pressures and the influence of the wood features on the properties of plywood produced with sapwood and heartwood Hovenia dulcis combined with Pinus elliottii. To support the discussion, the anatomical and physical characterizations of the wood were carried out. The panels were produced by applying three different press pressures (0.88, 1.18 and 1.47 MPa) and with six combinations of wood veneers. Phenol-formaldehyde resin was employed, 160 g m -2in a simple line and 35% solid content. The anatomical analysis revealed that the sapwood is more permeable than the H. dulcis heartwood. The H. dulcis wood basic density it was higher than that of the P. elliottii. Increased press pressure raised the values of the apparent density, thickness swelling and thickness swelling plus recovery of the plywood and water absorption reduction. The panels produced with H. dulcis veneers presented higher apparent density, MOR, MOE and bonding line resistance, as well as lower water absorption and moisture content, than those produced with P. elliottii veneers. No difference was noticed regarding the plywood properties when the main effects were evaluated in relation to the use of H. dulcis heartwood and sapwood veneers.Keywords: wood panels, japanese raisin tree, wood veneers, phenol-formaldehyde resin.Propriedades de painéis compensados multilaminados produzidos com madeira de Hovenia dulcis Thunb. e Pinus elliottii, em diferentes pressões de prensagem RESUMO. O estudo avaliou o efeito do uso de diferentes pressões de prensagem e a influência das características da madeira nas propriedades dos painéis compensados produzidos com lâminas de alburno e de cerne da madeira de Hovenia dulcis, e em combinação com Pinus elliottii. Para subsidiar a discussão, foi realizada a caracterização anatômica e física da madeira. Os painéis foram produzidos sob três pressões (0,88, 1,18 e 1,47 MPa) e em seis combinações de lâminas de madeira. Utilizou-se resina fenolformaldeído, na gramatura de 160 g m -² em linha simples e teor de sólidos de 35%. A análise anatômica mostrou que a madeira de alburno de H. dulcis é mais permeável que a de cerne e que a densidade básica de ambas foi maior que a de P. elliottii. O aumento da pressão de prensagem causou aumento da densidade aparente, do inchamento e do inchamento mais recuperação em espessura e redução da absorção d´água dos painéis. Os painéis produzidos com lâminas de H. dulcis tiveram maior densidade aparente, MOR, MOE e resistência da linha de cola, e menor absorção d´água e teor de umidade, do que os produzidos com P. elliottii, não se verificando diferenças entre cerne e alburno de H. dulcis.Palavras-chave: painéis de madeira, uva do Japão, lâminas de madeira, resina fenol-formaldeído.

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AVALIAÇÃO DA QUALIDADE DE PAINÉIS COMPENSADOS PRODUZIDOS COM LÂMINAS DE MADEIRA DE Schizolobium amazonicum

Cited by 19 publications

References 2 publications

QUALITY OF PLYWOODS OBTAINED FROM Melia azedarach COMBINED WITH Pinus taeda, PRODUCED WITH UREA-FORMALDEHYDE AND PHENOL-FORMALDEHYDE RESINS

QUALITY OF PLYWOODS OBTAINED FROM Melia azedarach COMBINED WITH Pinus taeda, PRODUCED WITH UREA-FORMALDEHYDE AND PHENOL-FORMALDEHYDE RESINS

PRODUÇÃO DE PAINÉIS COMPENSADOS COM LÂMINAS DE MADEIRA DE Sequoia sempervirens E RESINA UREIA-FORMALDEÍDO

<b>Properties of multi-laminated plywood produced with <i>Hovenia dulcis</i> Thunb. and <i>Pinus elliottii</i> wood under different pressing pressures

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