Interactions of Coating and Wood Flooring Surface System Properties (original) (raw)
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Annals of WULS, Forestry and Wood Technology, 2020
An influence of contemporary oil coatings on the aesthetical properties and abrasion resistance of oak wood parquets. The article analyses the influence of oil coatings on the colour, gloss, and abrasion resistance of parquets made of oak wood. Popular oil coatings of the same brand were compared: two-ingredient oil, single-ingredient oil and wax oil. A comparison of properties of several different kinds of oil manufactured by the same brand reveals that they do have influence on the changes in wood properties, when comparing to wood without finish. Single-ingredient and two-ingredient oil darken the colour, increase in red colour and in yellow colour to a similar extent, while wax oil darkens it and increase the share of red and yellow colour less. As to gloss, there are no statistically significant differences between the influence of the different oils. Twoingredient oil practically does not change resistance to abrasion at all, while single-ingredient oil and wax oil reduce the ...
Effects of thermal modification of oak wood upon selected properties of coating systems
BioResources
In the last few years there has been an increased demand to change the natural color of valuable hardwoods without chemicals for use mainly in indoor parquet floors. In this study, wood samples from oak (Quercus petraea L.), one of the most used species for parquet, were heat treated (ThermoWood method) at 190 °C for 2 h and at 212 °C for 1 and 2 h. Untreated and heat treated wood surfaces were coated following two different applications: type 1, with a single layer of sealer (50 g/m2) and type 2 with two layers (35 g/m2) using a nanolacke varnishing system. The objective of this study was to investigate surface properties including adhesion, glossiness, pendulum hardness, and color (L*, a*, b*, ΔE*, ΔL*, Δa*, and Δb*). With heat treatment the lightness decreases, and its decrease is higher for higher temperatures and treatment times. Type 2 coated wood presented a slightly lower lightness decrease. The experiment showed a slight increase followed by a decrease in redness (lower a*)...
EVALUATION OF WOOD SURFACE COATING PERFORMANCE USING WATER BASED, SOLVENT BASED AND POWDER COATING
The objective of this study was to evaluate the surface coating performance using water base, solvent base and powder coating on medium density fiberboard. Samples were coated using water-base, solvent-base and powder coating. Coating performance was performed by using adhesion strength, surface coating hardness, layer thickness and rapid deformation test. The results were analyzed with two different statistical methods. Adhesion strength, layer thickness and surface hardness were determined by using ANOVA analysis, while results of rapid deformation test were analyzed by using Kruskal-Wallis method. According to these results, coating type was effective factor on the adhesion strength, surface coating hardness, layer thickness and rapid deformation test. Water-based painting application for adhesion strength and impact deformation resistance were higher than solvent-based coating. In the powder coating application, although surface coating hardness was higher than solvent and water base coating application, rapid deformation results were lower than solvent and water base coating applications. Adequacy of models was performed R-square (R²) and Adjusted R-square (Adj-R 2) values. R 2 values of adhesion strength, layer hardness and film layer thickness were 93,60 %; 95,33 % and 73,90 %, respectively. Adj-R 2 values of adhesion strength, layer hardness and film layer thickness were 93,45 %; 95,23 % and 73,30 %, respectively.
Influence of wooden floor surface finish on its hardness und resistance to abrasion
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology, 2013
Influence of wooden floor surface finish on its hardness and resistance to abrasion. Traditional methods of wood impregnation consisted in soaking it with substances of natural origin: vegetable oils, beet sugar, cane sugar, paraffin, colophony, waxes, potassium alum, etc. The surface of antique wooden parquets was soaked with wax or with oils. The research was aimed at specifying the properties of different finish coatings used as traditional means of wooden floor surface finishing, by analysing the changes in hardness and resistance to abrasion of samples without finish coating and samples covered with wax, varnish (natural linen oil), as well as contemporary synthetic parquet oil combined with wax oil. Research was carried out on antique and contemporary wood samples. The tests of wood hardness were done in accordance with the Brinell method, in line with the PN-EN 1534:2011 standard. The abrasion resistance was measured with the Taber method on the basis of mass loss, in accorda...
Wettability and bonding quality of exterior coatings on jabon and sengon wood surfaces
Journal of Coatings Technology and Research, 2017
Wettability and bonding quality of exterior coatings on fast-growing wood surfaces were studied. Samples of air-dried flat-grained (tangential surface) and edge-grained (radial surface) pattern of jabon (Anthocephalus cadamba) and sengon (Paraserianthes falcataria) woods were used. Before application of exterior coatings, the surfaces of the lumber samples were sanded. To provide wood surfaces with various degrees of roughness, abrasive papers of 120, 240, and 360 grits were used for the surface preparation. The wettability of two exterior coatings (water-based acrylic and oil-based alkyd varnishes) on the sanded wood surfaces was measured using a sessile drop contact angle method. The Shi and Gardner (S/G) model was used to evaluate and compare the wettability of the surface coatings on the wood. The sanded wood samples were coated with the two coatings (two layers each). Bonding quality of the coating layers was measured using a crosscut tape test method. Experimental results show that constant contact angle change rate (K value) of the S/G model decreased as the grit number of abrasive paper increased. This indicates that the wettability decreased as the roughness of the surface decreased (surface becomes smoother). There was no evidence of differences in wettability between tangential and radial wood surfaces. The oil-based alkyd coating generated better wettability compared to the water-based acrylic. The crosscut tests showed that the bonding quality of the coating films on both jabon and sengon wood decreased as the surface became smoother. The sengon wood compared to jabon wood provided better coating wettability and bonding quality. Wettability in terms of the K values was a good indication for determining the bonding quality of the two varnish layers.
Performance evaluation of strip parquet flooring panels after long-term, in-service exposure
2014
Due to its extraordinary hardness, decorative appearance and possible small dimensions, black locust wood is assumed to be an excellent material for strip parquet flooring. The favourable colour changes achieved by controlled steam treatment further increased the utilization potential of this material. Flooring was installed on a student dormitory stair landing in heavy use. Due to the flooring’s very high exposure, 5 years was considered a long enough period to compare the different face layer materials during in-service test. Oil was used as a coating to avoid the remarkable protecting effect of hard film-forming varnishes (acrylic, etc.) against abrasion. Besides the flooring turning grey (all face layers no matter what treat ment), only some delamination occurred at certain places after five years in service. The laboratory test results for abrasion resistance, dimensional changes and deformation were analysed. Additionally, the Brinell-Morath hardness after indoor service and t...
Drvna industrija
In this research, the influence of face milling, sanding and UV irradiation of the hornbeam and ash wood sample on the wetting and adhesion strength of solvent-based and water-borne coating was studied. The adhesion of coatings to substrates is one of the most important parameters for finishing quality and service life of wood coatings, while wetting properties are usually used to assess the quality of surfacing process and could also provide important information on the adhesion ability of coatings. Surface roughness, contact angle of coatings and water as well as adhesion strength of coatings were tested on differently prepared (face milled, sanded and UV irradiated) samples of unmodified and thermally modified ash and hornbeam wood. Surface roughness was measured with stylus-type profilometer over the traverse of 12.5 mm and with a cut-off value of 2.5. Contact angle was measured using the sessile drop method 2 s, 10 s and 30 s after the application of the liquid drop on the samp...
The Effect of Wood Species on the Anti-Skid Resistance of Coatings
Maderas. Ciencia y tecnología, 2013
The anti-skid resistance of six coatings (Alfa, Beta, Gamma, Lambda, Mu and Theta) designed for outdoor wood flooring were tested in chestnut (Castanea sativa Mill.) and pine (Pinus pinaster Ait.) using a Portable Skid Resistance Tester according to standard ENV 12633. Film thickness, coating retention level, and presence of mineral particles were determined for each coating. Furthermore, the liquid water absorption coefficient of chestnut was determined in accordance with standard UNE-EN 1609, to relate all parameters. The highest value of skid resistance in both chestnut and pine was obtained with coating Mu (49.75) and coating Gamma (53.16), respectively. Film thickness and coating retention level were consistently higher for pine than for chestnut. Gamma presented the highest presence of minerals. For chestnut the absorption coefficient of liquid water in the tangential direction was 0.0056 ± 0.0010 kg•m-2 •s-0.5 , considerably lower than the value found for pine: 0.011 kg•m-2 •s-0.5. The different performance of the system wood-coating, and consequently the anti-skid resistance, was attributed to the absorption properties of the different species.
The Efficiency of Different Wood Coatings against Water Surface Absorption
Rural Sustainability Research, 2021
In the market of the Latvia different wood surface coating materials suitable for use in outdoor conditions are offered, but available information on the efficiency of these against direct water exposure is insufficient. For structural timber building elements, such as glued laminated timber (GLT), the surface coating should be applied taking into account technological, visual or colour changes (ISO 7724:1984) and – last, but not least – economic aspects are considered. Wood surfaces coated with coating materials, such as varnishes, paints, etc. can stabilize some properties such as movement of moisture content, dimensional changes and attack by microorganisms and fungi. The changes in the moisture content of timber may influence such important parameters as mechanical properties and the total life time of the structural timber elements. A study has been conducted with the aim of assessing the efficiency of coating materials used for wood protection against water absorption. In this...
Influence of wooden floor surface finish on its resistance and scratches
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology, 2013
Influence of wooden floor surface finish on its resistance to scratches. The investigation of traditional wooden floor surface finish properties was also related to the changes in resistance to scratches of samples without finishing and samples covered with wax, with varnish and with contemporary parquet oil combined with wax oil. Research was carried out on antique and contemporary wood samples. The tests of resistance to scratches were performed on the basis of the PN-EN 438-2:2005 standard. The standard is used for finish coating tests and is not an accurate tool for testing wood without finish. In accordance to that standard, all the tested samples fall in the same group, because continuous scratches appeared already in case of the 1N force. However, the divergence between the degree of scratching was significant for different wood species, as well as for contemporary and antique wood. Therefore, the test results were calculated for the width of the scratches. We assumed that th...