Effect of Thermal Ageing on the Gloss and the Adhesion Strength of the Wood Varnish Layers

Demirci, Zafer; Sönmez, Abdullah; Budakçı, Mehmet

doi:10.15376/biores.8.2.1852-1867

Cited by 30 publications

(31 citation statements)

References 9 publications

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“…Similar findings were reported in terms of hardness, gloss and adherence by Demirci et al (2013). In this study, both varnishes applied by spraying, were almost in the same range of glossiness, but some small differences were noticed.…”

Section: Resultssupporting

confidence: 89%

“…In previous studies, for species such as pine and beech, it was found that the adhesion strength of the water-borne varnish was lower when compared to solvent-based varnishes (Sonmez et al 2011;Demirci et al 2013) and the varnish types which dry via going through a chemical reaction on the wood surface were reported to have high adhesion strength (Demirci et al 2013).…”

Section: Resultsmentioning

confidence: 97%

“…This trend was noticed for both coating systems when UV varnish was used. The gloss of a varnished layer was determined in a previous study to be dependent on the smoothness of the surface as well as on its ability to reflect light (Demirci et al 2013). Such brightness can be provided on a material surface whose pores are completely filled (Pelit et al 2015).…”

Section: Resultsmentioning

confidence: 99%

“…In beech, cellulose varnish has deeper penetration and enhanced adhesion than softwoods, while waterborne coatings generally have lower wet adhesion than solvent borne ones (Sonmez et al 2011;Demirci et al 2013;Ozdemir and Hiziroglu 2015). Birch wood has more cohesive failures than ash when varnished with acrylicpolyurethane (Vitosyte et al 2012).…”

Section: Introductionmentioning

confidence: 99%

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Some Coating Properties of Black Alder Wood as a Function of Varnish Type and Application Method

Salca¹,

Krystofiak²,

Lis³

et al. 2016

BioResources

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The objective of this study was to evaluate the adhesion strength and glossiness of black alder wood (Alnus glutinosa Gaertn. L.) coated with water-borne and UV varnishes by two application systems. Prior to coating, the samples were prepared by sanding with four combinations of grit size sandpapers, 180 being the final grit. The surface quality of the specimens was measured with a white light profilometer. Any increase in grit size gradually reduced surface roughness, which further influenced the overall coating performance of the samples. UV varnish applied by roller presented higher adhesion strength and gloss as compared to spraying. The specimens varnished with a water-borne finish by spraying exhibited a better adherence to the substrate than those of UV varnished samples by the same method and provided glossiness at 60° geometry in the same range. These results are valuable for the furniture manufacturing industry for generating a better use and efficiency of secondary wood resources in order to achieve value-added products.

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Section: Resultssupporting

confidence: 89%

Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Some Coating Properties of Black Alder Wood as a Function of Varnish Type and Application Method

Salca¹,

Krystofiak²,

Lis³

et al. 2016

BioResources

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show abstract

“…404 plastic steel epoxy strong adhesive was used (Ayata 2014). The steel test cylinders with Ø 20 mm were attached to the sample surfaces at room temperature (~ 20ºC) via the help of a cast system (Demirci et al 2013). Glued samples were then fixed by means of tools.…”

Section: Adhesion Strength Testmentioning

confidence: 99%

Effects of heat treatment on the adhesion strength, pendulum hardness, surface roughness, color and glossiness of Scots pine laminated parquet with two different types of UV varnish application

Gürleyen¹,

Ayata

Esteves

2017

Maderas, Cienc. tecnol.

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The objective of this study was to investigate the surface properties of a UV-system applied on laminated parquet made with untreated and heat treated wood (ThermoWood). In this study, wood specimens prepared from Scots pine (Pinus sylvestris) wood were heat treated according to ThermoWood method at 190 o C for 2 hours and at 212 o C for 1 and 2 hours adhesion strength, pendulum hardness, surface roughness, colour and glossiness were determined. The UV-system was applied in two different types according to manufacturer recommendations. Results show that lightness and glossiness decreases and red colour tone increases with heat treatment. Pendulum hardness increased initially, decreasing afterwards with the intensity of the heat treatment. Tests showed that adhesion generally decreased with heat treatment. No significant differences were found for the surface roughness although a slight decrease was observed.

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Gloss of thermally densified alder (Alnus glutinosa Goertn.), beech (Fagus sylvatica L.), birch (Betula verrucosa Ehrh.), and pine (Pinus sylvestris L.) wood veneers

et al. 2014

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Thermo-mechanical densification of wood is performed to improve physical and mechanical properties of wood. During this treatment aesthetic properties of wood, including gloss, also change. Therefore, the purpose of this study was to determine the effect of short-term thermo-mechanical (STTM) densification in different wood species (alder (Alnus glutinosa Goertn.), beech (Fagus sylvatica L.), birch (Betula verrucosa Ehrh.), and pine (Pinus sylvestris L.)) on their gloss changes. Commercial wood veneers were densified in a hot plate press for 4 min at temperatures of 100, 150 and 200°C, pressures of 4, 8 and 12 MPa. Gloss was evaluated at 20°, 60°and 85°a ngles of incident light using PICO GLOSS 503. Gloss measurements showed an enhancement of aesthetic properties of densified wood. Findings of this study indicated that both densification temperature and pressure have a significant effect on wood gloss. Gloss values of densified wood increased with increasing densification temperature and pressure for all investigated species. Compared to nondensified wood, gloss (85°) values (across/along the grain) for alder, beech, birch and pine increased after treatment to 2109.1/2376.9, 1728.6/2311.1, 2787.5/3000, and 2591.7/ 1216.7 %, respectively. The greatest gloss values were recorded at 200°C and pressure of 12 MPa for all tested angles of incident light and for all densified wood samples. Gloss changes for birch were the highest, but the glossiest surface was observed for pine among all investigated species after wood densification.

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Effect of Thermal Ageing on the Gloss and the Adhesion Strength of the Wood Varnish Layers

Cited by 30 publications

References 9 publications

Some Coating Properties of Black Alder Wood as a Function of Varnish Type and Application Method

Some Coating Properties of Black Alder Wood as a Function of Varnish Type and Application Method

Effects of heat treatment on the adhesion strength, pendulum hardness, surface roughness, color and glossiness of Scots pine laminated parquet with two different types of UV varnish application

Gloss of thermally densified alder (Alnus glutinosa Goertn.), beech (Fagus sylvatica L.), birch (Betula verrucosa Ehrh.), and pine (Pinus sylvestris L.) wood veneers

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