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 Effects of the thickness of rotary-cut veneers on properties of plywood sheets. Part 2. Physical and mechanical properties of plywood materials

2012 ◽  
Vol 52 (No. 3) ◽  
pp. 118-129
Author(s):  
J. Hrázský ◽  
P. Král
Keyword(s):  
Mechanical Properties ◽  
Shear Strength ◽  
Bending Strength ◽  
Urea Formaldehyde ◽  
Physical And Mechanical Properties ◽  
Urea Formaldehyde Resin ◽  
Formaldehyde Resin ◽  
Institutional Research ◽  
Nominal Thickness

The second part of the paper summarizes results of an institutional research aimed at the determination of physical and mechanical properties of different sets of plywood sheets pressed under different conditions. The first part dealt with the determination of compressibility or values of decreasing the thickness of pressed plywood sheets. In this second part, results are summarized of the analysis of physical and mechanical properties of the set of whole-beech plywood sheets of the nominal thickness of veneers amounting to 1.5 mm. The plywood sheets were manufactured as seven-ply and urea-formaldehyde resin DUKOL S was used for their production. The sheets were pressed using a pressure of 1.5 and 1.7 MPa. Following parameters were analyzed: moisture, density, bending strength, MOE in bending and shear strength.

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

FLORESTA ◽  
2013 ◽  
Vol 44 (1) ◽  
pp. 93 ◽  
Author(s):  
Setsuo Iwakiri ◽  
Rosilani Trianoski ◽  
Vinicius Gomes Castro ◽  
Carlos Frederico Alice Parchen ◽  
Roberto Daniel Araújo
Keyword(s):  
Shear Strength ◽  
Pinus Taeda ◽  
Phenol Formaldehyde ◽  
Urea Formaldehyde ◽  
Glue Line ◽  
Melia Azedarach ◽  
Formaldehyde Resin ◽  
Shear Tests ◽  
Wood Veneer

AbstractThis 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).Keywords: Cinamomo; wood veneer; glue line. ResumoQualidade de painéis compensados de Melia azedarach em combinação com Pinus taeda produzidos com resina uréia-formaldeído e fenol-formaldeído. O objetivo deste trabalho foi avaliar a qualidade de painéis compensados de Melia azedarach em combinação com Pinus taeda, produzidos com resina ureia-formaldeído (UF) e fenol-formaldeído (FF). Foram produzidos painéis com todas as cinco lâminas de Melia azedarach e de Pinus taeda, e capas de Melia azedarach e miolo de Pinus taeda. Os painéis foram avaliados por meio de ensaios de cisalhamento da linha de cola e flexão estática paralela e perpendicular. Maiores teores de extrativos presentes na madeira de Melia azedarach não prejudicaram a resistência da linha de cola entre as lâminas. Tanto para a colagem uréica, quanto para a fenólica, os painéis produzidos com lâminas de Melia azedarach apresentaram melhores resultados nos ensaios de flexão estática e de cisalhamento da linha de cola. Os resultados obtidos indicam grande potencial da madeira de Melia azedarach para produção de painéis compensados, tanto para uso interior (UF), quanto para uso exterior (FF).Palavras-chave: Cinamomo; lâminas de madeira; linha de cola.

scholarly journals USE OF RESIDUES OF FORESTRY EXPLORATION OF Pinus taeda FOR PARTICLEBOARD MANUFACTURE

2017 ◽  
Vol 41 (3) ◽  
Author(s):  
Setsuo Iwakiri ◽  
Rosilani Trianoski ◽  
Daniel Chies ◽  
Everton Lorenzett Tavares ◽  
Morgana Cristina França ◽  
...  
Keyword(s):  
Pinus Taeda ◽  
Urea Formaldehyde ◽  
Physical And Mechanical Properties ◽  
Dry Weight ◽  
Formaldehyde Resin ◽  
Forest Exploitation ◽  
Pressing Time ◽  
Nominal Density ◽  
Bond Tests

ABSTRACT This study aimed to evaluate the quality of particleboards manufactured with forest exploitation waste from Pinus taeda. The material in the form of branches, tree tops, stumps and roots, was obtained from a forest plantation located in the Municipality of Mafra -SC. All the material was processed into wood chips for biomass and transported to the place of studies. The Pinus industrial particles were used as control and mixed with the waste in different proportions. The experimental plan consisted of the panels manufacture with 100% of each type of material and mixture of these com proportions of 75/25%, 50/50% and 25/75% with Pinus industrial particles, in addition to the mixture in equal parts, of the three types of materials. Experimental panels were manufactured with nominal density of 0.75 g/cm3, using the urea-formaldehyde resin, in the proportion of 8% of solids -dry weight basis of the particles. The panels were pressed with specific pressure of 4.0 MPa, temperature of 160ºC and pressing time of 8 minutes. The results of the internal bond tests met the requirements of the standard EN 312, is indicative that there has been a proper bonding of these particles originating forest exploitation wastes. General evaluations of the physical and mechanical properties results of the experimental panels indicate the possibility of use of particles obtained from branches, tree tops, stumps and roots, mixed com the industrial Pinus particles, in proportion of, up to, 50%, for particleboard manufacture.

Improving the Thickness-Swelling (TS) of Castor-Stalk Based Panel

2011 ◽  
Vol 183-185 ◽  
pp. 2095-2099
Author(s):  
Xiao Ping Li ◽  
Ding Guo Zhou ◽  
Si Qun Wang
Keyword(s):  
Mechanical Properties ◽  
Castor Oil ◽  
Urea Formaldehyde ◽  
Urea Formaldehyde Resin ◽  
People’S Republic Of China ◽  
Formaldehyde Resin ◽  
People's Republic Of China ◽  
Thickness Swelling ◽  
Republic Of China

Castor-oil stalk is one kind of excellent woody materials, and the thickness swelling ( TS ) of the castor-oil stalk based panel with Urea- formaldehyde resin ( UF ) cannot meet the requirement of the Standard of People’s Republic of China. the TS of the panel was improved with wax emulsion.Results showed that the mechanical properties and the TS of the particle panels were improved as the wax emulsion loading increased. The TS of castor stalk based particle boards and fiber boards can meet the requirement of standard of PRC when 1.44 and 1.2 wt% wax emulsion, respectively, was added.

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.

scholarly journals Optimization of properties of Eucalyptus oriented strand boards by specific gravity of panels

2018 ◽  
Vol 24 (2) ◽  
Author(s):  
Thiago Souza da Rosa ◽  
Rosilani Trianoski ◽  
Setsuo Iwakiri ◽  
Ghislaine Miranda Bonduelle ◽  
Claudiney Do Couto Guimarães
Keyword(s):  
Mechanical Properties ◽  
Specific Gravity ◽  
Pinus Taeda ◽  
Inverse Relationship ◽  
Linear Models ◽  
Oriented Strand Board ◽  
Phenol Formaldehyde ◽  
Phenol Formaldehyde Resin ◽  
Formaldehyde Resin ◽  
Eucalyptus Species

This study aimed to determine the influence of specific gravity on properties of oriented strand boards produced with five Eucalyptus species and get linear models between the properties and the densification of the panels. The species studied were: Eucalyptus benthamii, E. dunni, E. grandis, E. saligna, E. urograndis and the mixture between them. The panels were produced with phenol formaldehyde resin and nominal densities of 0,65 g/cm³ and 0,75 g/cm³. The water absorption has an inverse relationship to the density of the panel. The relation between mechanical properties and specific gravity of the panel is directly proportional. The panels produced with the Eucalyptus species showed better properties than those produced with control species (Pinus taeda), except for tensile perpendicular. By means of linear models obtained in this study conditions for each species, it can estimate the specific gravity to produce oriented strand board panels that adequate the standard requirements.

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