scholarly journals Evaluation of the quality of particleboard panels manufactured with wood from Sequoia sempervirens and Pinus taeda

CERNE ◽  
2014 ◽  
Vol 20 (2) ◽  
pp. 209-216 ◽  
Author(s):  
Setsuo Iwakiri ◽  
Rosilani Trianoski ◽  
Alexsandro Bayestorff da Cunha ◽  
Vinicus Gomes de Castro ◽  
Rafael Leite Braz ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Pinus Taeda ◽  
Internal Bond ◽  
Urea Formaldehyde ◽  
Physical And Mechanical Properties ◽  
Sequoia Sempervirens ◽  
Formaldehyde Resin ◽  
Mixing Ratios ◽  
Minimum Requirements ◽  
Compaction Ratio

This work aimed to evaluate the physical and mechanical properties of particleboard panels manufactured with wood particles from Sequoia sempervirens and Pinus taeda and urea-formaldehyde resin (UF), using different mixing ratios of the two species, namely 100%, 0%, 75%, 50% and 25% of sequoia particles. Properties evaluated included panel density and compaction ratio, water absorption and thickness swelling after 24 hours of immersion, internal bond and static bending (MOE and MOR). The low density of sequoia wood raised the compaction ratio of the panels and helped improve their mechanical properties and dimensional stability. Panels manufactured at the ratios of 100%, 75%, 50% and 25% sequoia to pine provided better results compared to panels manufactured with 100% pine. Results of MOE and MOR under static bending and of internal bond met the minimum requirements of standard EN 312:2003 in all treatments. Results revealed that Sequoia sempervirens has great potential for production of particleboard.

Characterization of particleboard made from oil heat-treated rubberwood particles at different mixing ratios

BioResources ◽  
2020 ◽  
Vol 15 (3) ◽  
pp. 6795-6810
Author(s):  
Nurul Fatiha Osman ◽  
Paimon Bawon ◽  
Seng Hua Lee ◽  
Pakhriazad Hassan Zaki ◽  
Syeed SaifulAzry Osman Al-Eldrus ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Oil Content ◽  
Urea Formaldehyde ◽  
Physical And Mechanical Properties ◽  
Thermal Characterization ◽  
High Dimensional ◽  
Mixing Ratios ◽  
Uf Resin ◽  
Heat Treated

Particleboard was produced by mixing oil heat-treated rubberwood particles at different ratios, with the goal of achieving high dimensional stability. Rubberwood particles were soaked in palm oil for 2 h and heat treated at 200 °C for 2 h. The treated particles were soaked in boiling water for 30 min to remove oil and were tested for chemical alteration and thermal characterization via Fourier-transform infrared spectroscopy and thermogravimetric analysis. Particleboard was fabricated by mixing treated rubberwood particles (30%, 50%, and 70%) with untreated particles (70%, 50%, and 30%, respective to previous percentages) and bonded with urea-formaldehyde (UF) resin. The results revealed that oil-heat treated particles had greater thermal stability than the untreated particles. The addition of oil heat treated particles improved the physical properties of the particleboard with no significant reduction in mechanical strength. However, this was only valid for ratios of 70% untreated to 30% treated and 50% untreated to 50% treated. When a ratio of 70% oil heat treated particles was used, both the physical and mechanical properties were reduced drastically, due to bonding interference caused by excessive oil content. Particleboard made with a ratio of 5:5 (treated to untreated) exhibited the best physical and mechanical properties.

scholarly journals Physical and Mechanical Properties of Binderless Particleboard Made from Steam-Pretreated Oil Palm Trunk Particles

2019 ◽  
Vol 3 (2) ◽  
pp. 46 ◽  
Author(s):  
Jia Geng Boon ◽  
Rokiah Hashim ◽  
Mohammed Danish ◽  
Wan Noor Aidawati Wan Nadhari
Keyword(s):  
Mechanical Properties ◽  
Oil Palm ◽  
Chemical Constituents ◽  
Starch Content ◽  
Urea Formaldehyde ◽  
Health And Safety ◽  
Physical And Mechanical Properties ◽  
Steam Pretreatment ◽  
Formaldehyde Resin ◽  
Oil Palm Trunk

Formaldehyde emissions from conventional particleboards raise issues of health and safety. One of the potential solutions is binderless particleboards made without using synthetic adhesives. However, the physical and mechanical properties of untreated binderless particleboards are relatively poor compared to conventional particleboards. This research aims to reveal the potential of using steam pretreatment to improve binderless particleboard properties made from oil palm trunk. The oil palm trunk particles were treated with steam pretreatment for different durations of time (20, 40, 60 min). The chemical constituents of the treated and untreated particles were evaluated. The binderless particleboards were made from treated and untreated particles. In addition, panels using untreated oil palm trunk particles with 10% urea–formaldehyde resin were made and used as a comparison. The boards were evaluated according to European Standards. The results indicated that the hemicellulose and starch content gradually reduced with the progression of steam pretreatment. The physical and mechanical properties were improved by increasing steam pretreatment duration. The steam pretreatment was able to improve the properties of binderless particleboards made from oil palm trunk. However, the performance of steam-pretreated binderless particleboard in this study is not compatible with the particleboards made using 10% urea–formaldehyde.

scholarly journals PRODUCTION OF PARTICLEBOARD FROM DISCARDED FURNITURE1

2018 ◽  
Vol 41 (4) ◽  
Author(s):  
Esoline Helena Cavalli Zamarian ◽  
Setsuo Iwakiri ◽  
Rosilani Trianoski ◽  
Carlos Eduardo Camargo de Albuquerque
Keyword(s):  
Internal Bond ◽  
Urea Formaldehyde ◽  
Physical And Mechanical Properties ◽  
Formaldehyde Resin ◽  
Specific Pressure ◽  
Waste Wood ◽  
Pressing Time ◽  
Nominal Density ◽  
A Company

ABSTRACT This research aims to evaluate the quality of particleboard produced with particles generated from discarded furniture, both in its pure form or mixed with industrial particles of Pinus. The material was collected in the region of Curitiba City (Paraná) in the form of chips processed in an industrial chipper of a company specialized in waste wood recycling. The experimental plan consisted in producing panels with 10%, 25%, 50% and 75% of particles obtained from discarded furniture mixed with particles of Pinus, and panels with 100% of such materials. Panels were produced with nominal density of 0,70 g/cm3, using the urea-formaldehyde resin in a proportion of 10% solids - dry basis weight of the particles and 1% paraffin emulsion. The panels were pressed with a specific pressure of 4,0 MPa, temperature of 140ºC and pressing time of 10 minutes. The results of internal bond met the requirements of the standard EN 312, which indicates that there was an adequate bonding of these particles obtained from discarded furniture. The results of physical and mechanical properties of the panels demonstrated the feasibility of using particles from discarded furniture when producing particleboard, with the possibility of full use of these particles from waste without mixing it with industrial particles of Pinus free from contamination.

scholarly journals EVALUATIOM OF PHYSICAL AND MECHANICAL PROPERTIES OF PARTICLEBOARD PRODUCED FROM WOOD OF Cupressus torulosa IN MIXTURE WITH Pinus taeda

FLORESTA ◽  
2020 ◽  
Vol 50 (3) ◽  
pp. 1478
Author(s):  
Setsuo Iwakiri ◽  
Rosilani Trianoski ◽  
Amanda Leite Da Silva ◽  
Angela Maria Stüpp ◽  
Bruna Mulinari Cabral ◽  
...  
Keyword(s):  
Pinus Taeda ◽  
Urea Formaldehyde ◽  
Physical And Mechanical Properties ◽  
Formaldehyde Resin ◽  
Wood Particles ◽  
Normative Requirements ◽  
Nominal Density ◽  
Cupressus Torulosa ◽  
Screw Withdrawal

The objective of this work was to evaluate the quality of particleboard produced with 100% of wood of Cupressus torulosa and in different mixing proportions with Pinus taeda. The experimental panels were produced with wood particles of Cupressus torulosa/Pinus taeda, in proportions of 100/0%, 80/20%, 60/40%, 40/60%, 20/80% and 0/100%, totaling six treatments. The panels were produced with nominal density of 0.75g/cm³, 8% urea-formaldehyde resin and 1% paraffin emulsion. The quality of the panels was evaluated by water absorption and swelling thickness 2 and 24 hours, static bending (MOE and MOR), perpendicular tension (internal bonding) and screw withdrawal. The comparative evaluations of the results of this research, with the Pinus taeda, others species referenced in the literature, and normative requirements of EN 312-2003 for commercial panels, indicated great potential of the wood of Cupressus torulosa for the particleboard production.

STUDY OF THE INFLUENCE OF STABILIZERS ON THE PROPERTIES OF CARBAMIDE FOR-MALDEHYDE BINDER AND FC PLYWOOD

2020 ◽  
Vol 10 (1) ◽  
pp. 136-143
Author(s):  
A. Fedotov ◽  
Tat'yana Vahnina ◽  
Andrey Titunin ◽  
Aleksandr Sviridov
Keyword(s):  
Mechanical Properties ◽  
Bending Strength ◽  
Urea Formaldehyde ◽  
Physical And Mechanical Properties ◽  
Strength Reduction ◽  
Cohesive Strength ◽  
Urea Formaldehyde Resin ◽  
Strength Characteristics ◽  
Formaldehyde Resin ◽  
Glycerol Mono

The problem of stabilizing the properties of the urea-formaldehyde binder during storage is relevant for both glued products and resins. Changing the performance of the resin during storage makes it difficult to apply a binder and leads to a deterioration in the physical and mechanical properties of plywood. The effect of glycerol, mono- and triethanolamine, as well as a mixture of glycerol and monoethanolamine on the nominal viscosity of the resin after 56 days of storage, has been studied. The use of glycerol and monoethanolamine (including in the complex) reduces the nominal viscosity of the resin by 13.5-24.8%. The use of triethanolamine as a stabilizer makes it possible to reduce the nominal viscosity by 35% in comparison with the index of an unstabilized oligomer. Mechanical properties of FC plywood based on the stabilized and unstabilized binder has been studied. It was found that glycerol additive (or glycerol in combination with monoethanolamine) significantly reduces strength characteristics of plywood, which makes it irrational to use these stabilizers. The addition of 0.2% triethanolamine to CFS allows a 35% reduction in the nominal viscosity of the resin, while the cohesive strength of the binder decreases by 1.5%. The result is within the framework of the dispersion of the indicator, i.e. strength reduction is negligible. The static bending strength of plywood with a stabilized triethanolamine binder is more important than that of control specimens without the addition of stabilizers. The results of the study enable to recommend the addition of triethanolamine in an amount of 0.2% by weight of urea-formaldehyde resin as a rational stabilizer

scholarly journals AVALIAÇÃO DAS PROPRIEDADES FÍSICAS E MECÂNICAS DE PAINÉIS DE FIBRAS DE MÉDIA DENSIDADE (MDF) PRODUZIDOS PELAS INDÚSTRIAS BRASILEIRAS

FLORESTA ◽  
2010 ◽  
Vol 40 (2) ◽  
Author(s):  
Luciane Paes Torquato ◽  
Setsuo Iwakiri ◽  
Ghislaine Miranda Bonduelle ◽  
Carlos Eduardo Camargo de Albuquerque ◽  
Jorge Luís Monteiro de Matos
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Internal Bond ◽  
Medium Density Fiberboard ◽  
Wood Fiber ◽  
Physical And Mechanical Properties ◽  
Thickness Swelling ◽  
European Standard ◽  
Pine Wood ◽  
Minimum Requirements

Este trabalho foi desenvolvido com o objetivo de avaliar a qualidade de painéis MDF produzidos pelas indústrias brasileiras com base nos resultados de propriedades físicas e mecânicas dos painéis tipo “standard” com 15 mm de espessura. Foram selecionadas quatro empresas produtoras de painéis MDF, que foram identificadas pelas letras A, B, C e D. Para as avaliações das propriedades dos painéis, foram, coletadas para todas as empresas, três painéis-amostras produzidos com madeira de pinus, além de painéis de eucalipto para a empresa D. As propriedades avaliadas foram: teor de umidade, densidade, perfil de densidade, absorção de água e inchamento em espessura 2 e 24 horas, ligação interna e flexão estática. Os ensaios foram realizados de acordo com a norma europeia EM, e os resultados foram comparados com os requisitos da norma EN 622-5:2006. Os painéis produzidos com madeira de eucalipto apresentaram valores médios inferiores de ligação interna e média de absorção de água maior que os obtidos com painéis de pinus. Os valores médios de inchamento em espessura 24 horas, MOE e MOR em flexão estática paralela dos painéis MDF comerciais avaliados nesta pesquisa atendem aos requisitos mínimos da norma EN 622-5:2006. Os valores médios de ligação interna foram inferiores em relação aos requisitos dessa norma. Palavras-chave: Painéis MDF; pinus; fibras de madeira.   Abstract Evaluation of physical and mechanical properties of medium density fiberboard (MDF) manufactured from brazilian industries. This research was developed to evaluate the quality of MDF manufactured by brazilian industries based on the results of physical and mechanical properties of the standard boards with 15 mm thickness. Four factories were selected and identified as A, B, C, and D. For the evaluation of the board properties, they were collected from the all factories three samples produced by pine wood, besides of sample produced by eucalipto wood to the factory D. The following board properties were evaluated: moisture content, density, density profile, water absorption and thickness swelling 2 and 24 hours, internal bond and static bending. The tests were carried out according to European Standard EN and the results were compared with the requirements of European Standard EN 622-5:2006. The boards manufactured from eucalipto wood showed lower average values of internal bond and higher water absorption in comparison to boards manufactured from pine wood. The average values of thickness swelling after 24 hours water soaking, MOE and MOR parallel static bending of the commercial MDF evaluated in this study attends to minimum requirements of EN 622-5:2006. The average values of internal bond were lower than in relation to the EN standard.Keywords: MDF; pine; wood fiber.

scholarly journals AVALIAÇÃO DO POTENCIAL DE USO DE ESPÉCIES DE PÍNUS TROPICAIS E EUCALIPTO NA PRODUÇÃO DE PAINÉIS COMPENSADOS UREICOS

FLORESTA ◽  
2012 ◽  
Vol 42 (2) ◽  
pp. 277 ◽  
Author(s):  
Setsuo Iwakiri ◽  
Felipe Gustavo Sanches ◽  
Daniele Cristina Potulski ◽  
Janice Bernardo Silva ◽  
Mário De Andrade ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Shear Strength ◽  
Pinus Taeda ◽  
Urea Formaldehyde ◽  
Urea Formaldehyde Resin ◽  
Formaldehyde Resin ◽  
Eucalyptus Species ◽  
Pressing Time ◽  
Potential Use

Esta pesquisa teve como objetivo avaliar a qualidade dos painéis compensados multilaminados produzidos a partir de lâminas de madeira de cinco espécies de pínus tropicais e nove espécies de eucalipto. Foram produzidos em laboratório painéis compensados com cinco lâminas de 2,0 mm de espessura, coladas com resina ureia-formaldeído (UF), com gramatura de 360 g/m². Os painéis foram prensados com pressão específica de 10 kgf/cm², temperatura de 110 ºC e tempo de prensagem de 7 min. Foram avaliadas as propriedades de resistência da linha de cola aos esforços de cisalhamento (RLC), teste seco e úmido e flexão estática (MOE e MOR) paralela e perpendicular. Entre as espécies de pínus tropicais, o P. oocarpa e P. tecunumannii foram as que apresentaram melhor desempenho. Já para as espécies de eucalipto, os melhores resultados foram obtidos para E. saligna, E. viminalis e E. dunnii. Todas as espécies de pínus tropicais e de eucalipto avaliadas neste estudo apresentaram resultados de propriedades mecânicas estatisticamente iguais ou superiores em relação à espécie referencial – Pinus taeda. Os resultados obtidos indicam a viabilidade de uso de lâminas dessas espécies para fabricação de painéis compensados para uso interior.Palavras-chave: Lâminas de madeira; compensados; pínus tropicais; eucalipto. AbstractEvaluation of potential use of species of tropical pine and eucalyptus for UF plywood manufacture. This research was developed in order to evaluate the quality of plywood manufactured from veneers of five species of tropical pine and nine species of eucalyptus. The plywood was manufactured with five veneers of 2.0 mm thickness, using urea-formaldehyde resin with amount of glue spread of 360 g/m². The boards were pressed at pressure of 10 kgf/cm², temperatures of 110 ºC and pressing time of 8 minutes. It was evaluated the properties of glue line shear strength (RLC) and static bending (MOE and MOR), parallel and perpendicular. Among tropical pine species, P. oocarpa and P. tecunumannii presented the best results in relation to mechanical properties of the boards. For the eucalyptus species  best results were obtained by E. saligna, E. viminalis and E. dunnii. All the  tropical pine and eucalyptus species evaluated in this research presented boards mechanical properties statistically equal or greater when compared to referential species - Pinus taeda. The results revealed the feasible use of such species veneers for plywood manufactures to internal applications.Keywords: Veneers; plywood; tropical pine; eucalyptus.

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

FLORESTA ◽  
2012 ◽  
Vol 42 (4) ◽  
pp. 809 ◽  
Author(s):  
Setsuo Iwakiri ◽  
Alexsandro Bayestorff Cunha ◽  
José Guilherme Prata ◽  
Rafael Leite Braz ◽  
Vinicius Gomes Castro ◽  
...  
Keyword(s):  
Urea Formaldehyde ◽  
Point Of View ◽  
Urea Formaldehyde Resin ◽  
Sequoia Sempervirens ◽  
Formaldehyde Resin ◽  
Wood Veneer ◽  
Economic Point ◽  
Mean Values ◽  
Pressing Time ◽  
Minimum Requirements

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.AbstractProduction 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.Keywords: Wood veneer; sequoia; plywood; urea-formaldehyde.

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