Optimization of some panel manufacturing parameters for the best bonding strength of plywood

Demirkır, Cenk; Özşahin, Şükrü; Aydın, İsmail; Çolakoğlu, Gürsel

doi:10.1016/j.ijadhadh.2013.05.007

Cited by 66 publications

(31 citation statements)

References 4 publications

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“…Research on plywood and other wood composites (mainly agglomerated), their properties, and the modification and optimization of the pressing process is applied globally. The research considers the effect of adhesives on heat transfer during the pressing process (Aydin 2014); influence of veneer modification on the mechanical properties of plywood (Aro et al 2014); the optimized parameters of manufacture in the scope of the final composite mechanical properties (Demirkir et al 2013;Gaff et al 2017a,b); and the influence of adhesives based on carbon fibers (Aziz et al 2015) or bark (Bai et al 2012) on the plywood properties.…”

Section: Introductionmentioning

confidence: 99%

Influence of Urea-formaldehyde Adhesive Modification with Beech Bark on Chosen Properties of Plywood

Ružiak¹,

Igaz²,

Krišťák³

et al. 2017

BioResources

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The influence of beech bark concentrations as filler in urea-formaldehyde (UF) adhesives was investigated relative to the composite forming process and selected properties of final 5-layer beech plywood. Beech bark was used as filler to lower the wood processing waste production and decrease formaldehyde emissions. A combination of UF adhesives filled with different beech bark concentrations as the adhesive was used. Three different concentrations of beech bark, 15 wt.%, 20 wt.%, and 25 wt.% were used in the experiment. Urea-formaldehyde adhesive filled with 20 wt.% technical flour was used as a reference sample. The effect of the filler was studied via its temperature profile during pressing, mechanical properties in bending, water absorption, thickness swelling, and formaldehyde emissions after pressing. The time needed to reach the temperature between the beech veneers, at least 105 °C, which was equal to the final temperature filler-adhesive-wood matrix cross-linking, was also investigated during the pressing process. The measurements of the free formaldehyde emissions showed that for samples with non-zero bark concentrations there was a decrease of formaldehyde emissions by at least 46%.

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Section: Introductionmentioning

confidence: 99%

Influence of Urea-formaldehyde Adhesive Modification with Beech Bark on Chosen Properties of Plywood

Ružiak¹,

Igaz²,

Krišťák³

et al. 2017

BioResources

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“…The heat treatment decreased the shear strength values as the treatment temperature and duration increased. The most important factors affecting the shear strength of wood and wood-based material are the wood species, adhesive type, wood density, log temperature during the veneer peeling or clipping, veneer drying temperature, and the relative moisture content of wood (Demirkir et al 2013). Yorur et al (2014) studied the effect of humidity-water-heat tests on the bonding strength of impregnated oak (Quercus petraea spp.)…”

Section: Introductionmentioning

confidence: 99%

Bonding Strength of Some Adhesives in Heat-Treated Hornbeam (Carpinus betulus L.) Wood Used for Interior and Exterior Decoration

Uzun¹,

Perçin²,

Altınok³

et al. 2016

BioResources

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Heat-treated wood has an ever-expanding market for exterior and interior applications. The objective of this study was to determine the effect of a heat treatment on the bonding strength of hornbeam (Carpinus betulus L.) wood that was bonded with melamine formaldehyde (MF), polyurethane (PUR), and polyvinyl acetate (PVAc-D4) adhesives. Hornbeam lamellas were heat treated at 150 °C, 175 °C, 200 °C, and 225 °C for 3 h and then bonded. The bonding strength of the specimens was determined. In addition, the density, weight loss, and pH value of the heat-treated wood were investigated. The results showed that the bonding strengths of the heat-treated wood specimens decreased with the temperature of the heat treatment. The bonding strength of the PUR adhesive was higher than the MF and the PVAc-D4.

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“…Cold plasma treatments can cause physical and chemical changes to depths of several microns, without changing the volume. In recent years, plasma modification technology has been applied to the surface modification of wood and wood-based materials in order to enhance the surface properties of the wood component and mechanical strength of the wood-based materials [15][16][17]. Plasma treatment can result in the formation of free radicals and active sites in the poplar wood surface [18].…”

Section: Ofmentioning

confidence: 99%

Plasma Treatments to Improve the Bonding of Thermo-Treated Cherry Wood

Zheng¹,

Zhang²,

Lin³

et al. 2019

Coatings

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Thermal treatment can significantly improve the dimensional stability of wood, but it will decrease the bonding strength. In this work, the bonding strength of thermo-treated cherry wood boards was improved by plasma treatment. The change of wettability, surface morphology, and surface chemical property of cherry wood before and after plasma treatment was investigated by water contact angle measurement, Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM), and X-ray photoelectron spectroscopy (XPS). The plasma treatment significantly improved the wettability of thermo-treated cherry wood by decreasing its water contact angle from 109.95° to 53.18°. N2 or O2 was used as the plasma atmosphere, and it was found that N2 plasma treatment afforded cherry wood a rougher surface. The AFM roughness of cherry wood was increased from 19 nm to 31.9 nm after N2 plasma treatment. XPS results revealed an additional C–N group for N2 plasma treatment and the content of C=O, O–C–O, and O–C=O increased for O2 plasma treatment, respectively, indicating that the surface chemical property of cherry wood was modified. Due to the surface character, the bonding strength increased by 21.17% for N2 plasma treatment and 15.32% for O2 plasma treatment.

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Optimization of some panel manufacturing parameters for the best bonding strength of plywood

Cited by 66 publications

References 4 publications

Influence of Urea-formaldehyde Adhesive Modification with Beech Bark on Chosen Properties of Plywood

Influence of Urea-formaldehyde Adhesive Modification with Beech Bark on Chosen Properties of Plywood

Bonding Strength of Some Adhesives in Heat-Treated Hornbeam (Carpinus betulus L.) Wood Used for Interior and Exterior Decoration

Plasma Treatments to Improve the Bonding of Thermo-Treated Cherry Wood

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