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    Assessment of a solar-assisted infrared timber drying system
    (Wiley, 2017) Aktas, Mustafa; Ceylan, Ilhan; Ergun, Alper; Gurel, Ali Etem; Atar, Musa
    This study investigates convective-infrared drying characteristics of timber. The biggest disadvantage of infrared heating systems is the uncontrollable rise of the surface temperature up to extremely high values, which causes damage to the product. In this study, the power of an infrared system was controlled and adjusted according to the surface temperature of the product. In doing so, the surface temperature of the infrared heater was prevented from reaching up to values that could damage the product. During the analysis, the surface temperature of the timbers was kept at an average of 65 degrees C, while the bottom temperature was kept at an average of 45 degrees C. The air collector used in the system was found to be 50% efficient. At the end of a 13-h drying period, the moisture content of pine timbers could be reduced from 1.42 to 0.0948 g water/g dry matter. During the system analysis, parameters such as moisture content, mass diffusion coefficient, and useful energy rate were taken into consideration. (c) 2017 American Institute of Chemical Engineers Environ Prog, 36: 1875-1881, 2017
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    Determination of diagonal compression and tension performances for case furniture corner joints constructed with wood biscuits
    (Elsevier Sci Ltd, 2009) Atar, Musa; Ozcifci, Ayhan; Altinok, Mustafa; Celikel, Uzeyir
    This study was carried out to determine the performance of different wood biscuits on the diagonal compression and tension strength for case-type furniture corner joints. For this purpose, melamine-coated particleboard (MCP) and melamine-coated fiberboard (MCF) panels were bonded with polyvinyl acetate (PVAc)and Desmodur VTKA (DVTKA) adhesives on miter joint (Mj) and butt joints (Bj). The diagonal compression and tension strength tests were done according to ASTM D 1037 standards. As a result, the highest diagonal compression and tension strength were obtained in MCF with DVTKA adhesive, As for the interactions, panel + adhesive + corner joints, the highest value was MCF + DVTKA + miter joint in both compression and tension tests. According to these, it is advised that the member of the wood biscuits produced from solid woods is used in the corner joints in case furniture. (C) 2008 Elsevier Ltd. All rights reserved.
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    The effects of screw and back panels on the strength of corner joints in case furniture
    (Elsevier Sci Ltd, 2008) Atar, Musa; Ozcifci, Ayhan
    This study was carried out to determine the effects of screw and back panel on the corner joints in case furniture produced from medium density fiber board MDF, and particle board (PB). For this purpose, the different test panels, the edges of which were covered or uncovered with solid wood or massive and back rebated, not back rebated samples, were used and the types of L corner joints were manufactured. Also, the plywood used for back panel had a thickness of 4 mm. Compression and tension strength tests were applied on the corner joints in accordance with ASTM-D 143-83 standards. As a result, the highest tension strength was obtained in covered edges of MDF as 181.7 Nm, the lowest in rebated and uncovered samples as 78.7 Nm, the highest compression strength was obtained in rebated and covered samples as 178.7 Nm, and the lowest was observed in unrebated and uncovered samples as 79.5 Nm. In conclusion, the edges of cupboard panels should be rebated and covered with solid wood or massive wood in Case furniture. (c) 2007 Elsevier Ltd. All rights reserved.
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    Impact of Impregnation with Boron Compounds on the Surface Hardness and Abrasion Resistance of Some Varnished Woods
    (John Wiley & Sons Inc, 2009) Atar, Musa; Uysal, Burhanettin; Sarica, Mutlu
    This study was performed to determine the impact of impregnation with boron compounds on the Surface hardness and abrasion resistance of some varnished woods. For this purpose, test specimens prepared from Oriental beech, White oak, Scotch pine, and Uludag fir, which met the requirements of ASTM D 358, were impregnated according to ASTM D 1413-99 with boric acid (Ba), borax (Bx), and boric acid + borax (Ba+Bx) by the vacuum technique. After impregnation, the surfaces are coated with synthetic (Sn), water-borne (Wb) and acid hardening (Ah) varnishes in accordance with ASTM D 3023. the surface hardness of specimens after the varnishing process was determined in accordance with ASTM D 4366. The abrasion resistance of specimens after the varnishing process was determined in accordance with TS 4755. According to the wood type, impregnation material and varnish type, the surface hardness was the highest for Oriental beech impregnated with borax + boric acid and acid hardening varnish and the lowest for Uludag fir impregnated with borax + boric acid and synthetic varnish. According to the wood type, impregnation material and varnish type, the abrasion resistance was the highest for Oriental beech impregnated with borax + boric acid and acid hardening varnish and the lowest for Scotch pine impregnated with borax + boric acid and synthetic varnish. Those results should be taken into account for applications like parquet, flooring etc., where the surface hardness and abrasion resistance values are very important. (C) 2009 Wiley Periodicals, Inc. J Appl Polym Sci 114: 204-211, 2009