Avaliação da qualidade da madeira de um híbrido de Pinus elliottii  var. elliottii x Pinus caribaea var. hondurensis para produção de lâminas e manufatura de compensados

Almeida, Natalie Ferreira de

doi:10.11606/d.11.2011.tde-20122011-085649

Cited by 7 publications

(6 citation statements)

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“…The process of pressurizing the wooden sheets results in a volume reduction of the material, however, the mass of the panel remains constant, hence increasing the plywood's specific mass. Almeida et al(2012) in a study on plywood produced with Pinus sp. hybrids with double-glue phenol-formaldehyde adhesive with a glue-line weight of 380 g/m 2 , had a specific mass of 413 kg/m 3 , a value below that found in this study.…”

Section: Stage 1 Specific Massmentioning

confidence: 99%

Efficiency of castor oil-based polyurethane in the production of plywood panels

Wilczak¹,

Trianoski²,

Neto³

et al. 2019

Sci. For.

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Plywood panels are produced with polymeric adhesives derived from petroleum that can be hazardous to health and the environment, since they are made from non-renewable sources and contain organic solvents in their composition, which can cause diseases such as cancer. Polyurethane adhesives derived from castor oil-based are an alternative to those materials, because it is biodegradable and non-hazardous. The aim of this work was to evaluate the mechanical properties of plywood panels made with polyurethane adhesive derived from castor oil-based. Panels were produced with five sheets of Pinus caribaea bahamensis wood and three different adhesives: urea-formaldehyde, phenol formaldehyde, and polyurethane with a glue spread line of 180 g/m 2 for phenolic adhesives, and 120, 140, 160, 180 g/m 2 for polyurethane. The panels were evaluated in terms of specific mass, shear strength before and after immersion on boiling and cold water, in cycle and without immersion, and bending strength parallel and perpendicular to the fibers orientation. Results were statistically analyzed. The plywood panels produced with polyurethane adhesive derived from castor oil have superior shear strength and bending strength similar than those produced with the others tested adhesives, and the weight of 120 g/m 2 is the most suitable for bonding.

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Section: Stage 1 Specific Massmentioning

confidence: 99%

Efficiency of castor oil-based polyurethane in the production of plywood panels

Wilczak¹,

Trianoski²,

Neto³

et al. 2019

Sci. For.

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show abstract

“…Researches on Pinus sp. plywood physical properties characterizat ion are systematically in developing, however focusing panels produced in laboratory scale [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Quality Control in Plywood Manufacturing: Physical Properties of Commercial Plywood of Pinus sp

Almeida¹,

Ferro²,

Varanda³

et al. 2013

cmaterials

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Wood of genus Pinus have been widely used by plywood Brazilian industry, motivated by their good physical and mechanical properties as well as reforestation policies. For p lywood companies, quality control for its commercialization presents itself as essential. In th is sense, this paper aims to evaluate, by means of physical properties, homogeneity of plywood manufacturing process using Pinus sp. So, we selected four panels, and extracted samples to obtain their physical properties. Analysis of variance (ANOVA) was used to investigate manufacture homogeneity of the panels. ANOVA results, for all physical properties investigated, had presented statistical equivalence, showing consistency of product manufacture, independent of the supplier co mpany.

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“…W.H. Barrett & Golfari, de alto potencial sob o ponto de vista silvicultural no que diz respeito à produção de madeira (ALMEIDA et al, 2012) e na produção de painéis compensados para emprego na construção civil, fabricação de móveis, embalagens e caixas (ALMEIDA et al, 2014(ALMEIDA et al, , 2012SURDI et al, 2015).…”

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Análise dialélica na avaliação do potencial de híbridos de Pinus elliottii x Pinus caribaea para a formação de populações de melhoramento

Tambarussi¹,

Marques²,

Andrejow³

et al. 2018

Sci. For.

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Uma das dificuldades no melhoramento florestal é o longo ciclo de seleção de materiais genéticos superiores em qualidade e produtividade, problema que pode ser contornado via seleção precoce de híbridos. O objetivo da presente pesquisa foi estimar os parâmetros genéticos para caracteres silviculturais e verificar a viabilidade da seleção precoce em híbrido de Pinus elliottii x Pinus caribaea, visando a formar uma população base de melhoramento. O experimento foi estabelecido em delineamento em blocos ao acaso, com seis blocos, parcelas lineares de seis plantas e 24 tratamentos (21 progênies de polinização controlada e três testemunhas). Os caracteres diâmetro à altura do peito (DAP) e altura total (H) foram avaliados no quarto e oitavo ano após o plantio. Os quadrados médios referentes às capacidades geral (CGC) e específica (CEC) de combinação foram significativos para a H aos quatro e oito anos e para DAP aos oito anos. As diferenças significativas entre os tratamentos indicam a existência de variação genética, sugerindo a possibilidade de ganhos com a seleção. As correlações genéticas entre caracteres e entre idades foram altas, variando de 0,96 a 0,99, indicando que a seleção precoce pode ser uma ferramenta efetiva para implantação de uma população de melhoramento para o híbrido.

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Avaliação da qualidade da madeira de um híbrido de Pinus elliottii var. elliottii x Pinus caribaea var. hondurensis para produção de lâminas e manufatura de compensados

Abstract: ERRATA ALMEIDA, N. F. de. Avaliação da qualidade da madeira de um híbrido de Pinus elliottii var. elliottii x Pinus caribaea var. hondurensis para produção de lâminas e manufatura de compensados. Piracicaba, 2011. 115p. Dissertação (Mestrado em Ciências)

Cited by 7 publications

References 0 publications

Efficiency of castor oil-based polyurethane in the production of plywood panels

Efficiency of castor oil-based polyurethane in the production of plywood panels

Quality Control in Plywood Manufacturing: Physical Properties of Commercial Plywood of Pinus sp

Análise dialélica na avaliação do potencial de híbridos de Pinus elliottii x Pinus caribaea para a formação de populações de melhoramento

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