Effect of PVAc bonding on finger‐joint strength of steamed and unsteamed beech wood (<i>Fagus sylvatica</i>)

Vassiliou, V.; Barboutis, Ioannis; Karastergiou, Sotorios

doi:10.1002/app.25079

Cited by 31 publications

(12 citation statements)

References 3 publications

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“…Vassiliou et al (2007) reported that MOE of finger jointed samples of Beechwood joined using 10 mm long fingers and PVA was found unaffected compared to clear samples. The good retention of MOE of finger jointed African hardwood sections using resorcinol-formaldehyde adhesive up to about 83-98 % of the individual clear sections depending on the wood density and with a finger length of 18 mm also has been reported (Ayarkwa et al 2000).…”

Section: Methodsmentioning

confidence: 99%

Compression and flexural properties of finger jointed mango wood sections

Kumar

Sharma

Gupta³

2015

Maderas, Cienc. tecnol.

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In this paper, an attempt was made to assess the effectiveness of finger jointing in utilising mango wood sections for various end uses like furniture. The study was based on the estimation of Modulus of elasticity and Modulus of rupture under static bending and Maximum Crushing Stress and Modulus of elasticity under compression parallel to grain of finger jointed sections and comparing them with the values measured for clear wood sections from the same lot. For joining the sections, the Poly Vinyl Acetate and Urea Formaldehyde adhesives were used. It was found that the Modulus of elasticity of the sections joined by either adhesive showed significantly better values than that of unjointed clear wood sections. The Modulus of rupture values of sections joined with Urea Formaldehyde were similar to those of unjointed clear wood sections. However, sections jointed with Poly Vinyl Acetate adhesive exhibited lower Modulus of rupture. Under compression, the parameters of the jointed sections joined with either adhesive were either similar or better than those of the unjointed clear wood sections. The study demonstrates the utility of finger jointing of mango wood sections for furniture parts especially with the Urea Formaldehyde adhesive.

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Section: Methodsmentioning

confidence: 99%

Compression and flexural properties of finger jointed mango wood sections

Kumar

Sharma

Gupta³

2015

Maderas, Cienc. tecnol.

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“…Even the samples with finger length of 14 mm were still inferior to those achieved in this study. Finger joints glued with PVAc adhesive were also studied by Vassiliou et al (2007), where samples of Fagus sylvatica wood were subjected to bending tests. Class D1 and D2 adhesives showed lower modulus of rupture, while for the class C adhesive the modulus of rupture value was higher than that of adhesive D4 analyzed in this study.…”

Section: Resultsmentioning

confidence: 99%

BONDING BEHAVIOR OF Eucalyptus benthamii WOOD TO MANUFACTURE EDGE GLUED PANELS

Martins

Menezzi

Ferraz

et al. 2013

Maderas, Cienc. tecnol.

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The main objective of this study was to evaluate the performance of Eucalyptus benthamii Maiden et Cambage wood for the production of edge glued panels. Wood pieces with planed and sanded surfaces were bonded using cross-linking polyvinyl acetate (PVAc) and polyurethane (PUR) based adhesives, at pressures of 0.7 MPa and 1.0 MPa. The same adhesives were used for finger jointing at a pressure of 1.5 MPa. The bonding strength was determined through glue-line shear strength and bending test for finger jointing. According to the results, the pressure and surface preparation variables did not influence the glue-line shear strength of the adhesive PVAc, whereas for the PUR adhesive strength was influenced by the pressures and machining used. All treatments met the minimum values required by the standard; however, the highest bonding strength was found in the sample glued with PUR adhesive at a pressure of 1.0 MPa and sanded surface. The highest modulus of rupture was obtained in the samples glued using PVAc, while the modulus of elasticity was not affected by the type of adhesive used. These results enabled concluding that with regard to its technological properties assessed in the present study, E. benthamii wood is suitable for the production of edge glued panel.

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“…Increasing the finger length from 4 to 15 mm caused an increase in the mean modulus of rupture values. The effects of three durability classes of polyvinyl acetate bonding and of two finger lengths (4 mm and 10 mm) on the bending strength of steamed and unsteamed beech wood have been studied (Vassiliou et al 2007). It was found that higher modulus of rupture values resulted from the 10-mm finger length.…”

Section: Introductionmentioning

confidence: 99%

Elastic Properties of Oak Wood Finger Joints with Polyvinyl Acetate and Isocyanate Adhesives

Hemmasi¹,

Khademi-Eslam²,

Roohnia³

et al. 2013

BioResources

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In this study, the elastic properties of 23 specimens of oak timber (Quercus castaneifolia), including the longitudinal modulus of elasticity (MOE), acoustic coefficient (K), and acoustic converting efficiency (ACE) in free vibration using the free-free beam method with different planes of vibration, i.e. tangential (LT) and radial (LR), were studied. These elastic parameters were examined in both sound wood and finger jointed timbers with two different lengths of fingers (5-and 10-mm finger lengths) and individually glued with two different types of adhesives (isocyanate and polyvinyl acetate). Comparing the elastic properties of solid beams with finger jointed beams of oak wood in both (LT) and (LR) planes, 10-mm finger joints with polyvinyl acetate adhesive did not cause any serious change to the studied elastic properties of the beams, while shorter finger length (5 mm) with isocyanate adhesive severely changed the acoustic properties; therefore, beams having longer finger lengths may have enhanced acoustical properties.

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Effect of PVAc bonding on finger‐joint strength of steamed and unsteamed beech wood (Fagus sylvatica)

Cited by 31 publications

References 3 publications

Compression and flexural properties of finger jointed mango wood sections

Compression and flexural properties of finger jointed mango wood sections

BONDING BEHAVIOR OF Eucalyptus benthamii WOOD TO MANUFACTURE EDGE GLUED PANELS

Elastic Properties of Oak Wood Finger Joints with Polyvinyl Acetate and Isocyanate Adhesives

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