Bonding strength of oak with different adhesives after humid-water-heat tests

Yorur, Huseyin; Kurt, Şeref; Uysal, Burhanettin

doi:10.1080/01694243.2013.860676

Cited by 13 publications

(6 citation statements)

References 3 publications

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“…The results obtained in this study are in agreement with those of other researchers, who have reported a reduction in the water resistance of tested samples immediately after exposure to the effect of cold water, or in combination with a conditioning process [42,43,[48][49][50]. Analyses of the strength of joints compared with the maximum values showed, unambiguously for all systems, that the PUR adhesive used, when applied both to impregnated and unprotected wood, provides the technical possibility of obtaining water-resistant glued joints.…”

Section: Discussionsupporting

confidence: 93%

Adhesive Bonding of Scots Pine Wood from the Szczecinek Forest District for the Production of Garden Equipment: An Experimental Investigation

2022

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This work aimed to determine the gluability of pressure-impregnated pine wood with two protection agents used in production technologies for garden equipment and their effect on the strength, water resistance and thermal resistance of joints, as well as their susceptibility to aging. The tests were carried out on Scots pine wood (Pinus sylvestris L.) purchased from the forest districts of the Regional Directorate of State Forests in Szczecinek town, Poland. For the impregnation, two commercial protection agents were used. The pressure impregnation of the elements and gluing with the PUR adhesive were carried out by a garden furniture manufacturer. The strength and durability after aging tests of glued joints were performed in accordance with the procedure described in Technical Approval No. AT-15-2948/00 and the PN-EN ISO 9142 standard. The collected experimental data can be used in technological solutions, mainly for processes which involve gluing wood after impregnation.

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Section: Discussionsupporting

confidence: 93%

Adhesive Bonding of Scots Pine Wood from the Szczecinek Forest District for the Production of Garden Equipment: An Experimental Investigation

2022

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“…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.) bonded with UF, Desmodur-VTKA (Desmodur-Vinil trieketonol acetate), and polyvinyl acetate (PVAc) adhesives.…”

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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“…Pizzi and Mittal (2003) stated that polyurethane adhesives have a higher bonding strength and a higher tolerance against humidity. According to another study, PU is the least affected one compared to PVAc in the steam test (Yorur et al 2014).…”

Section: Pilot-hole Effectsmentioning

confidence: 99%

The effects of different variables on the screw withdrawal strength of plywood

Yorur¹,

Tor²,

Günay³

et al. 2017

Kastamonu Üniversitesi Orman Fakültesi Dergisi

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Aim of study: The purpose of this study was to investigate the effect of the pilot-hole, screw type, screwing direction, water soak and adhesive on the screw withdrawal strength in plywood.Material and Methods: Testing blocks were cut from 18-mm-thick beech plywood and were sized to 50 mm x 50 mm according to TS EN 13446 standards. Polyvinyl acetate (PVAc) and polyurethane (PU) as adhesives were injected into predrilled holes (80% of the screw major diameter). Two types of screws (3.5 mm and 4 mm in diameter) were inserted in perpendicular (face) and parallel (edge) to the surface of blocks. Half of the blocks were immersed in water for 2 hours before the screw withdrawal test. The results were analyzed and interpreted by statistical analysis.Main results: The results indicated that the screw withdrawal strength perpendicular to the surface is higher than that the one parallel to the surface. The testing blocks with PU specimens in pilot-hole showed higher screw withdrawal strength than the blocks with PVAc. The screw withdrawal strength was lower when blocks were immersed in water. It was also found that the screw withdrawal strength increases, as the screw major diameter increases.Research highlights: It was concluded that applying PU in pilot-holes before driving screw into plywood significantly affected screw withdrawal performance.

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Bonding strength of oak with different adhesives after humid-water-heat tests

Cited by 13 publications

References 3 publications

Adhesive Bonding of Scots Pine Wood from the Szczecinek Forest District for the Production of Garden Equipment: An Experimental Investigation

Adhesive Bonding of Scots Pine Wood from the Szczecinek Forest District for the Production of Garden Equipment: An Experimental Investigation

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

The effects of different variables on the screw withdrawal strength of plywood

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