scholarly journals EFFECTS OF POLYMER ADDITIVES ON SOME MECHANICAL AND PHYSICAL PROPERTIES OF CEMENT BONDED PARTICLEBOARDS

Wood Research ◽  
2021 ◽  
Vol 66 (3) ◽  
pp. 331-340
Author(s):  
HASAN HÜSEYİN TAŞ ◽  
BİLGE ARSLAN ◽  
HÜLYA KALAYCIOĞLU
Keyword(s):  
Bond Strength ◽  
Water Absorption ◽  
Internal Bond ◽  
Bending Strength ◽  
Physical And Mechanical Properties ◽  
Bending Stiffness ◽  
Internal Bond Strength ◽  
Polymer Additives ◽  
Thickness Swelling ◽  
Cement Mixture

The effects of some polymer additives, also called super plasticizers, on selected physical and mechanical properties of cement bonded particle board were investigated. Two different kinds of poly carboxylic ether (PF300, DX40) and a melamine based polymer (300M) were added to the wood cement mixture. The ratios of polymer additives to the wood cement mixture were 1%, 1.2% and 1.4%. Cement bonded particleboards were manufactured with wood/cement (w/w) ratio of 1:3; target density of 1300 kg.m-3, and CaCl2 content of 5%. The cement bonded particleboards were tested for water absorption (2 and 24 hour), thickness swelling (2 and 24 hour), bending stiffness and strength and internal bond strength. Results of the study showed that most of the polymer addition decreased water absorption and thickness swelling of the boards. Replacement of cement with polymers increased internal bond strength and bending stiffness of the boards while bending strength was slightly reduced. Use of small amount of super plasticizers significantly improves most of the board properties.

scholarly journals Influence of Adding Offcuts and Trims with a Recycling Approach on the Properties of High-Density Fibrous Composites

Polymers ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1327
Author(s):  
Conrad M. Sala ◽  
Eduardo Robles ◽  
Grzegorz Kowaluk
Keyword(s):  
Mechanical Properties ◽  
Bond Strength ◽  
Water Absorption ◽  
Internal Bond ◽  
High Density ◽  
Raw Material ◽  
Internal Bond Strength ◽  
Fibrous Composites ◽  
Thickness Swelling ◽  
Linear Decrease

The sizeable global production of wood-based products requires new sources of raw material, but also creates large quantities of wastes or composites that do not comply with requirements. In this study, the influence of different shares of recovered high-density fiberboards (HDF-r), reversed into the production, on industrial HDF properties, has been examined. HDF-r may be a suitable partial substitute for raw pinewood for industrial HDF production. Although most of the mechanical properties, as well as thickness swelling and water absorption, had a linear decrease with the increase in the share of HDF-r share, the elaborated boards met most of the commercial requirements (EN 622-5). The property that did not meet the requirements was the internal bond strength for panels with 10% of HDF-r. The presented results show that, after some adjustments, it should be possible to produce HDF boards with up to 10% of recycled HDF being able to meet all commercial requirements.

An attempt to use „Tetra Pak” waste material in particleboard technology

2021 ◽  
Vol 114 ◽  
pp. 70-75
Author(s):  
Radosław Auriga ◽  
Piotr Borysiuk ◽  
Alicja Auriga
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Bending Strength ◽  
Physical And Mechanical Properties ◽  
Core Layer ◽  
Waste Material ◽  
Thickness Swelling ◽  
The Core ◽  
Tetra Pak ◽  
The Impact

An attempt to use „Tetra Pak” waste material in particleboard technology. The study investigates the effect of addition Tetra Pak waste material in the core layer on physical and mechanical properties of chipboard. Three-layer chipboards with a thickness of 16 mm and a density of 650 kg / m3 were manufactured. The share of Tetra Pak waste material in the boards was varied: 0%, 5%, 10% and 25%. The density profile was measured to determine the impact of Tetra Pak share on the density distribution. In addition, the manufactured boards were tested for strength (MOR, MOE, IB), thickness swelling and water absorption after immersion in water for 2 and 24 hours. The tests revealed that Tetra Pak share does not affect significantly the value of static bending strength and modulus of elasticity of the chipboard, but it significantly decreases IB. Also, it has been found that Tetra Pak insignificantly decreases the value of swelling and water absorption of the chipboards.

scholarly journals Selected Properties of Overlaid Magnesium Based Composite Panels for Flooring

2020 ◽  
Vol 10 (15) ◽  
pp. 5028
Author(s):  
Fidan Aslanova ◽  
Gozen Elkiran ◽  
Salim Hiziroglu ◽  
Serkan Ilseven
Keyword(s):  
Bond Strength ◽  
Surface Quality ◽  
Internal Bond ◽  
Internal Bond Strength ◽  
Sample Type ◽  
Thickness Swelling ◽  
Mechanical And Physical Properties ◽  
Flooring Materials ◽  
Flooring Material

The objective of this work was to evaluate some of the mechanical and physical properties of the flooring materials manufactured from panels having magnesia substrate overlaid with oak veneer (Querqus alba) and linoleum sheets. Commercially manufactured panels were used in this work. Bending characteristics, internal bond strength, thickness swelling, and surface quality of the samples were evaluated. The highest modulus of elasticity (MOE) value of 4406 MPa for the sample type-A2 was loaded in the direction of the substrate followed by 3478 MPa for linoleum covered samples which were loaded in the same direction. Internal bond strength values of the panels did not show any significant differences from each other. Dimensional stability of the specimens in the form of thickness swelling for both 2-h and 24-h water soaking tests resulted in values ranging from 0.11 to 0.19%. The surface quality of the samples was not substantially influenced as a function of water exposure. Based on the results in this work magnesium substrate overlaid with oak veneer and linoleum panels could have potential to be used as flooring material with accepted properties.

The Explore of Wood Residues Railway Sleeper Composite Aging Properties

2012 ◽  
Vol 531 ◽  
pp. 128-132
Author(s):  
Jian Zhang ◽  
Sheng Ling Xiao ◽  
Yue Sun
Keyword(s):  
Data Analysis ◽  
Bond Strength ◽  
Internal Bond ◽  
Bending Strength ◽  
Accelerated Aging ◽  
Test Method ◽  
Internal Bond Strength ◽  
Aging Effects ◽  
Wood Residues ◽  
Railway Sleeper

The experiment choose optimum technological parameter of wood residues railway sleeper composite to manufacture test pieces, select UV accelerated aging test method, use static bending strength (MOR), modulus of elasticity (MOE) , dry internal bond strength (D-IB) , wet internal bond strength (W-IB) and 24h absorbent thickness swelling (TS) and other performance index as reference standard, utilize DPS data analysis software to process variance analysis and regression analysis on the obtained data , analysis the UV accelerated aging effects on wood residues railway sleeper composite physical and mechanical properties

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.

Mechanical Properties of Homogenous and Heterogeneous Three Layered Particleboard Composite in Relation on Different Resin Content

2013 ◽  
Vol 699 ◽  
pp. 637-640 ◽  
Author(s):  
Siti Noorbaini Sarmin ◽  
Shaikh Abdul Karim Yamani Zakaria ◽  
Jamaludin Kasim
Keyword(s):  
Mechanical Properties ◽  
Bond Strength ◽  
Internal Bond ◽  
Bending Strength ◽  
Urea Formaldehyde ◽  
Acacia Mangium ◽  
Resin Content ◽  
Internal Bond Strength ◽  
Japanese Industrial Standard

Two types of three layered particleboard composite, homogeneous (Acacia mangium core-face/back) and heterogeneous (Acacia mangium core, mixed sawdust face/back) were fabricated with three different resin contents and densities. Three different resin content; 8:10:8, 10:10:10 and 12:10:12, were use with 500, 600 and 700kg/m3 board densities. Urea Formaldehyde (UF) was used as a binder and 1% of wax was added. The properties of bending strength (MOR & MOE) and internal bond strength (IB) were evaluated based on Japanese Industrial Standard; JIS A 5908:2003 Particleboard (2003). The results showed that there were relationship between resin contents and densities on homogeneous and heterogeneous particleboard composites. Result obtained indicated that bending and internal bond strength of homogeneous composite bonded using ratio of 12:10:12 resin content with 700kg/m3 density was better compared to ratio of 8:10:8 and 10:10:10 resin contents. When the densities were increased, the mechanical properties also increased.

scholarly journals Some of the Physical and Mechanical Properties of Particleboard Made from Betung Bamboo (Dendrocalamus asper)

2021 ◽  
Vol 11 (8) ◽  
pp. 3682
Author(s):  
Lina Karlinasari ◽  
Prabu Setia Sejati ◽  
Ulfa Adzkia ◽  
Arinana Arinana ◽  
Salim Hiziroglu
Keyword(s):  
Mechanical Properties ◽  
Bond Strength ◽  
Internal Bond ◽  
Fine Particles ◽  
Value Added ◽  
Physical And Mechanical Properties ◽  
Internal Bond Strength ◽  
Density Level ◽  
Coarse Particles ◽  
Dendrocalamus Asper

The objective of this study was to evaluate various physical and mechanical properties of experimental particleboard panels made from Asian giant bamboo (Dendrocalamus asper). Single layer panels having a density level of 0.75 g/cm3 from coarse and fine particles were used within the scope of this study. Thickness swelling, water absorption, surface roughness, and wettability characteristics of the samples were tested as physical properties while bending, internal bond strength, and screw withdrawal strength of the panels were considered for their mechanical properties. Resistance of the panels against termite and fungus were also determined. Based on the findings in the work both physical and mechanical properties of the panels made from coarse particles resulted in higher values than those made from fine particles with the exception of their internal bond strength. It appears that using fine particles in the panels enhanced their overall surface quality as well as wettability. Regarding biological deterioration of the samples, those made with coarse particles had better resistance. It seems that giant bamboo as a non-wood lignocellulosic species would have potential to be used as raw material to the manufacture value added particleboard with accepted characteristics.

scholarly journals Effect of Panel Moisture Content on Internal Bond Strength and Thickness Swelling of Medium Density Fiberboard

Polymers ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 114
Author(s):  
Roberto Magalhães ◽  
Beatriz Nogueira ◽  
Samaritana Costa ◽  
Nádia Paiva ◽  
João M. Ferra ◽  
...  
Keyword(s):  
Moisture Content ◽  
Bond Strength ◽  
Internal Bond ◽  
Room Temperature ◽  
Medium Density Fiberboard ◽  
Internal Bond Strength ◽  
Medium Density ◽  
Thickness Swelling ◽  
European Standard ◽  
Test Pieces

Wood-based products usually have serious limitations concerning contact with water, both because wood is a hygroscopic material and because the commonly used binder has low moisture resistance. This paper studies the effect of panel moisture content (MC) on the physico-mechanical properties of medium density fiberboards (MDF). Several commercial MDF boards produced in Europe were stored at room temperature and relative humidity (RH) for 9 weeks (approx. range 15–20 °C and 50–85% RH). Every week, a strip of each MDF board was cut out, divided into 5 × 5 cm test pieces and its internal bond strength (IB) was measured. A strong influence of MDF moisture content on internal bond strength was observed and therefore IB test pieces were stored in a climatic chamber (either at 20 °C, 55% RH and at 20 °C, 70% RH). A decreasing linear relation was established between IB and MC. It was found that this effect is reversible: after drying, internal bond strength rises again (following a slight hysteresis). This work reinforces the importance of conditioned storage before board properties analysis, as described in European Standard EN 319.

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