Regularities of stable curved shape formation in panel elements made of medium-density fibreboard
DOI:
https://doi.org/10.36930/42265210Keywords:
medium-density fibreboard, MDF, curved panel element, bent-laminated element, stable residual shape, minimum allowable radius of curvature, board thickness, technological holding time, mathematical modelling, regression equationAbstract
The study focuses on determining the patterns of stable curved shape formation in panel elements made of medium-density fibreboard (MDF) and on mathematical modelling of the minimum allowable radius of curvature depending on the principal technological parameters. The relevance of the research is determined by the need for a scientifically substantiated selection of manufacturing conditions for bent-laminated elements used in furniture and joinery products, where the key requirement is not only to achieve the specified curvature during forming but also to preserve stable residual geometry after completion of the technological process. The variable factors were the thickness of a single MDF layer, h=2.0–6.0 mm, and the holding time between adhesive application and forming, τ=2–10 min. The response variable was the minimum allowable radius of curvature Rmin, at which a stable curved panel element can be produced without failure, cracking, delamination, or unacceptable springback. A two-factor experimental design with five replicate tests was applied. The mean experimental values of Rmin ranged from 104.240 to 382.840 mm. The thickness of a single MDF layer was found to have the dominant effect: increasing the layer thickness resulted in a substantial increase in the minimum allowable radius. The effect of technological holding time was nonlinear and exhibited an extremum, with a rational range located at approximately 6–7 min. A second-order polynomial mathematical model incorporating linear and quadratic effects as well as factor interaction was developed. The lowest experimentally determined value, Rmin=104.240 mm, was obtained at h=2.0 mm and τ=6 min. The established relationships provide a scientific and technological basis for selecting MDF layer thickness and holding time when manufacturing bent-laminated panel elements. The results can be applied in the technological design of curved raised panels for frame-and-panel fronts, furniture panels, and other furniture and joinery components requiring a stable residual curved shape
References
Abdul Khalil, H. P. S., Nur Firdaus, M. Y., Anis, M., & Ridzuan, R. (2008). The effect of storage time and hu-midity on mechanical and physical properties of medium density fiberboard (MDF) from oil palm empty fruit bunch and rubberwood. Polymer-Plastics Technology and Engineering. https://doi.org/10.1080/03602550802355644
Ashori, A., Nourbakhsh, A., & Karegarfard, A. (2009). Properties of medium density fiberboard based on ba-gasse fibers. Journal of Composite Materials, 43(18). https://doi.org/10.1177/0021998309341099
Ayrilmis, N. (2010). Some properties of thin medium density fiberboard panels treated with sunflower waste oil vapor. Materials & Design, 31(5), 2561–2567. https://doi.org/10.1016/j.matdes.2009.11.035
Ayrilmis, N., & Winandy, J. E. (2009). Effects of post heat-treatment on surface characteristics and adhesive bonding performance of medium density fiberboard. Materials and Manufacturing Processes, 24(5), 594–599. https://doi.org/10.1080/10426910902748032
Báder, M., & Németh, R. (2019). Moisture dependent mechanical properties of longitudinally compressed wood. European Journal of Wood and Wood Products, 77, 1009-1019. doi: 10.1007/s00107-019-01448-1.
Çamlıbel, O., Aydın, M., & Koç, E. (2024). Influences of oak utilization on the medium density fiberboard properties. Maderas. Ciencia y Tecnología. https://doi.org/10.22320/s0718221x/2024.21
Chai, Y., Lin, X., Tu, D., Zhou, Y., Lu, Z., & Hu, C. (2026). Strain analysis and plastic bending behaviour of laminated veneer lumber under high-frequency heating. Industrial Crops and Products, 241, 122746. https://doi.org/10.1016/j.indcrop.2026.122746
Chapiuk, O.S., & Kratiuk, O.M. (2026). To determination of deformation characteristics of glue-laimed pine and spruce wood at different humidities in the precritical and postcritical stages of work: experimental stage. Nau-kovi Notatki 85. https://doi.org/10.36910/775.24153966.2026.85.36
Datsiuk, V.V., & Pavluk, A.P. (2026). Influence of temperature-humidity regime on the deformability of bend-ing elements after long-term operation. Naukovi Notatki 85. https://doi.org/10.36910/775.24153966.2026.85.9
Garcia, R. A., Cloutier, A., & Riedl, B. (2006). Dimensional stability of MDF panels produced from heat-treated fibres. Holzforschung, 60(3), 278–284. https://doi.org/10.1515/HF.2006.045
Grytsak, S. (2024). Study of the technological process of bending ash wood. Forestry, Forest, Paper and Woodworking Industry, 50, 52-64. https://doi.org/10.36930/42245005
Grytsak, S., & et al. (2020). Comparative analysis of physical and mechanical characteristics of bent elements from different tree species. Forestry, Forest, Paper and Woodworking Industry, 46, 16-27. https://doi.org/10.36930/42204602
Grytsak, S., & Grytsak, S. (2023). Determination of the influence of pressing parameters on the bending pro-cess of beech furniture blankets. Forestry, Forest, Paper and Woodworking Industry, 49, 48-60. https://doi.org/10.36930/42234904
Gul, W., Ahmad, N., Mohammad, S., Salah, B., Sajid Ullah, S., Khurram, M., & Khan, R. (2023). Impact of moisture content, closing speed, and pressurizing speed on the performance of medium density fiberboard (MDF). Frontiers in Materials, 10, 1195789. https://doi.org/10.3389/fmats.2023.1195789
Harmaen, A. S., Jalaluddin, H., & Paridah, M. T. (2013). Properties of medium density fibreboard panels made from rubberwood and empty fruit bunches of oil palm biomass. Journal of Composite Materials, 47(22). https://doi.org/10.1177/0021998312459868
Homon, S., Litnitsky, S., Gomon, P., Kulakovskyi, L., & Kutsyna, I. (2023). Methods for determining the criti-cal deformations of wood with various moisture content. Scientific Horizons, 26(1), 73-86. https://doi.org/10.48077/scihor.26(1).2023.73-86
Hrytsak, S. (2017). Analysis of methods of receiving curv-lineary forms. Forestry, Forest, Paper and Woodworking Industry, 43, 20-25. https://doi.org/10.36930/42174302
Hrytsak, S., & Somar, G. (2016). Technical and economic analysis methods of manufac-turing curved blanks. Forestry, Forest, Paper and Woodworking Industry, 42, 21-28. https://doi.org/10.36930/42164204
Jainudin, N. A., et al. (2026). A decade of research on medium-density fiberboard: A bibliometric analysis of physical and mechanical properties. Forests, 17(5), 552. https://doi.org/10.3390/f17050552
Ji, X., Li, B., Yuan, B., & Guo, M. (2017). Preparation and characterizations of a chitosan-based medium-density fiberboard adhesive with high bonding strength and water resistance. Carbohydrate Polymers, 176, 273–280. https://doi.org/10.1016/j.carbpol.2017.08.100
Kindzera, A. R., & Kshyvetskyy, B. Y. (2026). Results of experimental studies on the strength of adhesive joints of alder wood with thermal modified ash wood. Scientific Bulletin of UNFU, 36(1), 88–95. https://doi.org/10.36930/40360110
Kulman, S., Boiko, L., Hurova, D., & Sedliačik, J. (2019). The effect of temperature and moisture changes on modulus of elasticity and modulus of rupture of particleboard. Acta Facultatis Xylologiae Zvolen, 61(1), 43-52. doi: 10.17423/afx.2019.61.1.04.
Lesiv, L., & et al. (2023). Mathematical model of forecasting volumes of post-consumer wood production. Forestry, Forest, Paper and Woodworking Industry, 49, 33-47. https://doi.org/10.36930/42234903
Medvid, L., & et al. (2025). Technological stages of processing post-consumer wood into high-quality blanks. Forestry Education and Science: Current Challenges and Development Prospects. https://doi.org/10.36930/conf0206
Nilsson, J., & Johansson, J. (2019). Bending and creep deformation of a wood-based lightweight panel: An experimental study. Wood and Fibre Science, 51(1), 16-25. doi: 10.22382/wfs-2019-003.
Petryshak, I., & Petryshak , M. (2011). The physical-and-mechanical model of wood deformation in the pro-cess of bending and pressing. Forestry, Forest, Paper and Woodworking Industry, 37(2), 91-94. https://doi.org/10.36930/421137220
Podibka, T., & Kiyko, O. (2019). А study of the influence of the transverse dimensions of beech of strips on the form of stability of furniture board. Forestry, Forest, Paper and Woodworking Industry, 45, 155-171. https://doi.org/10.36930/42194521
Pylypiv, I. (2011). The study of methods of wood bending. Forestry, Forest, Paper and Woodworking Indus-try, 37(2), 80-83. https://doi.org/10.36930/421137218
Pylypiv, I. (2012). Effect of moisture wood-fiber board on the process of bending. Forestry, Forest, Paper and Woodworking Industry, 38, 158-160. https://doi.org/10.36930/42123824
Pylypiv, I., & Dumanskyy, O. (2014). Building mathematical models depending on bend radius fiber boards concerning its thickness and hydration time. Forestry, Forest, Paper and Woodworking Industry, 40, 28-33. https://doi.org/10.36930/42144007
Rudavska, A., Maziarz, M., Šajgalí, M., Valášek, P., Zlamal, T., & Iasnii, V. (2018). The influence of selected factors on the strength of wood adhesive joints. Advances in Science and Technology, 12(3), 47-54. doi: 10.12913/22998624/92099.
Salapak, L., & et al. (2021). Determination of an efficient technological process of manufacturing various support elements for functional surfaces. Forestry, Forest, Paper and Woodworking Industry, 47, 58-72. https://doi.org/10.36930/42214708
Valko, S. M., & Kshyvetskyy, B. Y. (2026). Influence of temperature-humidity loads on the strength of glue joints of wood to tooth. Scientific Bulletin of UNFU, 36(2), 116–124. https://doi.org/10.36930/40360213
Wilczyński, A., & Kociszewski, M. (2007). Bending properties of particleboard and MDF layers. Holzforschung, 61(6), 717–722. https://doi.org/10.1515/HF.2007.116
Ye, X. P., Julson, J., Kuo, M., Womac, A., & Myers, D. (2007). Properties of medium density fiberboards made from renewable biomass. Bioresource Technology, 98(5), 1077–1084. https://doi.org/10.1016/j.biortech.2006.04.022
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