The effect of mat layers moisture content on some properties of particleboard

İstek, Abdullah; Aydın, Ufuk; Özlüsoylu, İsmail

doi:10.5552/drvind.2019.1821

Cited by 7 publications

(8 citation statements)

References 7 publications

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“…When the MC of the mat was reduced by changing the oven temperature from 80 to 100°C, the WA increased by about 20% after 24 hours of immersion. Previous studies have also shown that deviation from the optimal MC in the mat has a negative effect on the WA of particleboard (Istek et al, 2019). The accumulation of vapor in the core layer (high MC of the mat) and the weakening of the heat transfer process in the core (low MC of the mat) were the main factors affecting the intensity of adhesive curing, which also affects the WA of the specimens.…”

Section: Physical Propertiesmentioning

confidence: 90%

Wheat straw-based particleboards with citric acid as adhesive; influence of mat moisture and adhesive content

Khatiri,

Shalbafan,

Najafi

2023

Preprint

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ABSTRAC In this study, the properties of particleboard made from wheat straw using citric acid (CA) as a bio-adhesive were investigated. The effects of mat moisture content (MC) and adhesive on mechanical properties (flexural strength, modulus of elasticity, internal strength) and physical properties (thickness shrinkage and water absorption) of straw particleboard were evaluated. To control the MC of the mat, the resinated straw particles were oven dried at different times (2 to 14 hours) and temperatures (80 and 100 °C) to obtain a mat with MC between 20 and 0.5%. The effects of an adhesive content of 15, 20, 25 and 30% (based on the dry mass of the straw) on the properties of the panels were also studied. The best MC of the mat before hot pressing was about 11% (drying of the particles in 2 hours at 100 °C), and the corresponding board had the highest mechanical and the lowest physical properties. Further decreasing the MC of the mat from about 11% to 0.5% had a negative effect on the mechanical and physical properties of the straw particleboard. Increasing the adhesive content from 15% to 30% improved all mechanical and physical properties of the panels; however, the changes in the range of 20% to 30% of adhesive content on the flexural properties and water absorption were not significant. In general, the results showed that due to the acidic nature of CA, it is possible to produce particleboard from wheat straw without pretreating the straw particles before use.

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Section: Physical Propertiesmentioning

confidence: 90%

Wheat straw-based particleboards with citric acid as adhesive; influence of mat moisture and adhesive content

Khatiri,

Shalbafan,

Najafi

2023

Preprint

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“…Their results are therefore obscured by parameters that have well-known influences on board properties. These are board density [4][5][6], distinctive density profile [7], multi-layered board structure (different particle sizes in face and core layer), obvious particle-size distribution perpendicular to the board plane, adhesive content (AC) [3] (pp. 786-789), and surface-specific adhesive amount (SSAA) [2].…”

Section: Introductionmentioning

confidence: 99%

“…For example, Istek et al [8] investigated three-layer particleboards with varying particle dimensions in the face and core layers by using different sieve fractions. Due to the production parameters (press temperature: 180 • C; press duration: 190 s), it is likely that the boards possess distinctive density profiles that vary with the applied particle material and thus obscure the influence of the particle size.…”

Section: Introductionmentioning

confidence: 99%

“…However, if the different methodologies are disregarded, similarities can be observed. For example, various studies have shown a correlation between an increase in bending properties and either an increase in particle size [8] or an increase in slenderness ratio [9][10][11][12]14]. Other studies similarly found an increase in the IB with a decrease in the slenderness ratio [10,11,14].…”

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confidence: 99%

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Influence of Particle Size on the Mechanical Properties of Single-Layer Particleboards

Engehausen,

Benthien,

Lüdtke

2024

Fibers

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While most of the influences on the mechanical properties of particleboard appear to have been investigated, there is a lack of knowledge about the influence of particle size or particle dimensions due to the absence of a suitable particle measuring technique. The introduction of laser-based 3D scanning technology makes it possible to automatically determine the dimensions, surface area, and volume of particles. In this study, the influence of particle size on the mechanical properties of particleboards was investigated. To isolate potentially overlapping influences, single-layer particleboards with a uniform density profile were produced and analyzed. The amount of adhesive specific to the surface of the (fine) face layer particles and (coarse) core layer particles was adjusted utilizing 3D scanning of the surface areas to ensure comparability despite changes in particle size. It was found that with increasing particle size, the modulus of rupture (MOR) and modulus of elasticity (MOE) increase, while the internal bond strength (IB) decreases. It is considered whether these effects result from a particle-size-dependent orientation of the particles in the board. Furthermore, it is shown that all the aforementioned properties increase with increasing surface-specific adhesive amounts. Examples are provided to demonstrate how such fundamental relationships can be utilized to enhance the particleboard production process.

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“…The physicomechanical properties of particleboards, except their technological parameters, depend significantly on the characteristics of the raw materials used in their production [ 1 ]. These are the type and amount of the adhesive system used for their bonding, the type of the raw material, its degree of fragmentation and geometry (size and shape), and moisture content [ 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 ]. The right choice of the moisture content of the particles, independently of their fineness degree, is also necessary for assuring the correct industrial process of particleboards.…”

Section: Introductionmentioning

confidence: 99%

Characterisation of Wood Particles Used in the Particleboard Production as a Function of Their Moisture Content

et al. 2021

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The properties of particleboards and the course of their manufacturing process depend on the characteristics of wood particles, their degree of fineness, geometry, and moisture content. This research work aims to investigate the physical properties of wood particles used in the particleboard production in dependence on their moisture content. Two types of particles currently used in the production of three-layer particleboards, i.e., microparticles (MP) for the outer layers of particleboards and particles for the core layers (PCL), were used in the study. The particles with a moisture content of 0.55%, 3.5%, 7%, 10%, 15%, and 20% were tested for their poured bulk density (ρp), tapped bulk density (ρt), compression ratio (k), angle of repose (αR), and slippery angle of repose (αs). It was found that irrespective of the fineness of the particles, an increase in their moisture content caused an increase in the angle of repose and slippery angle of repose and an increase in poured and tapped bulk density, while for PCL, the biggest changes in bulk density occurred in the range up to 15% of moisture content, and for MP in the range above 7% of moisture content, respectively. An increase in the moisture content of PCL in the range studied results in a significant increase in the compression ratio from 47.1% to 66.7%. The compression ratio of MP increases only up to 15% of their moisture content—a change of value from 47.1% to 58.7%.

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The effect of mat layers moisture content on some properties of particleboard

Cited by 7 publications

References 7 publications

Wheat straw-based particleboards with citric acid as adhesive; influence of mat moisture and adhesive content

Wheat straw-based particleboards with citric acid as adhesive; influence of mat moisture and adhesive content

Influence of Particle Size on the Mechanical Properties of Single-Layer Particleboards

Characterisation of Wood Particles Used in the Particleboard Production as a Function of Their Moisture Content

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