INCREASING THE OUTDOOR DURABILITY OF UREA FORMALDEHIDE PARTICLE BOARD WITH NEW GENERATION WATER-BORNE ACRYLIC COATINGS

Yıl 2020, Cilt: 11 Sayı: 2, 159 - 166, 01.06.2020

Özlem Özgenç Gökay Nemlı

Öz

with urea formaldehyde are suitable for use in closed areas. However, melamine formaldehyde glue moisture resistance is relatively higher than urea formaldehyde glue moisture resistance. Particle board products produced with melamine formaldehyde can be used in semi-open outdoor conditions and indoor structures, except for common usage areas, where there may be hot-cold water leaks, moisture deposits or steam, such as bathrooms, showers, sinks, cellars or sinks (kitchen sinks).
In this study, it is aimed to increase the resistance of urea formaldehyde particle board to semi-open outdoor conditions (temperature and humidity) by applying water-borne acrylic coatings. The outdoor durability of urea formaldehyde particle boards (test panels) prepared with in two different water-borne acrylic coating formulations was compared with urea formaldehyde and melamine formaldehyde particle boards (control panels). For the test and control samples, artificial weathering test was applied for 12 days (288 h). After the weathering test, some mechanical (flexural strength, modulus of elasticity, tensile strength) and physical (surface roughness, water absorption, moisture and density) of the test and control samples were determined.
After the outdoor test, the change in the mechanical and physical properties of the test samples were found close to the control on melamine formaldehyde particle boards. However, it was determined that the semi-open outdoor durability of the test samples was quite higher than urea formaldehyde particle boards without coating applied. The results of this study showed that in semi-open outdoor conditions, urea formaldehyde particle boards can be preferred instead of melamine formaldehyde particle boards.

Anahtar Kelimeler

Acrylic coating, mechanical properties, outdoor durability, particle board, physical properties

Kaynakça

• [1] Baharoğlu M., Nemli G., Sarı B., Ayrilmis N., Bardak S. and Zekoviç, E. (2014). Effect of paraffin application technique on the physical and mechanical properties of particle board, Sci Eng Compos Mater 21(2), 191–195.
• [2] Nemli G., Demirel S., Gümüşkaya E., Aslan M. and Acar C., (2009). Feasibility of incorporating waste grass clippings (Lolium perenne L.) in particle board composites, Waste Management 29, 1129–1131
• [3] Nemli G., Ors Y., Kalaycıoglu H., (2005). The choosing of suitable decorative surface coating material types for interior end use applications of particle board, Construction and Building Materials, 19, 307–312.
• [4] Girods P., Anthony Dufour A., Rogaume Y., Rogaume C. and Zoulalian A., (2008). Pyrolysis of wood waste containing urea-formaldehyde and melamine-formaldehyde resins, J. Anal. Appl. Pyrolysis 81, 113–120.
• [5] Geimer R.L., Heebink B.G., Hefty F.V., (1973). Weathering Characteristics of Particle board, USDA Forest Service, Research Paper, FPL 212.
• [6] Kajita H., Mukudai J., Yano H., (1991). Durability evaluation of particle boards by accelerated aging tests, Wood Sci. Technol., 25, 239-249.
• [7] Nemli G., Akbulut T., and Zekoviç E., (2007). Effects of Some Sanding Factors on the Surface Roughness of Particle board, Silva Fennica, 41(2), 373-378.
• [8] Sahin H.T., Arslan M.B, (2011). Weathering performance of particle boards manufactured from blends of forest residues with red pine (Pinus brutia) wood, Maderas. Ciencia y tecnología 13(3), 337-346.
• [9] Barnes H.M. and Lyon D.E., (1978). Effect of weathering on the dimensional properties of particle board decking, Wood and Fiber Science 10(3), 175-185.
• [10] Kalaycıoglu K. and Nemli G., (2006), Producing composite particle board from kenaf (Hibiscus cannabinus L.) stalks, Industrial Crops and Products 24, 177–180.
• [11] Nemli G. and Aydın A., (2007). Evaluation of the physical and mechanical properties of particle board made from the needle litter of Pinus pinaster Ait., Industrial Crops and Products 26, 252–258.
• [12] Park B.D., Lee S.M., Roh J.K., (2009). Effects of formaldehyde/urea mole ratio and melamine content on the hydrolytic stability of cured urea-melamine-formaldehyde resin, Eur. J. Wood Prod. 67, 121–123.
• [13] Young No B. and G. Kim, M.G., (2007). Evaluation of Melamine-Modified Urea-Formaldehyde Resins as Particle board Binders, Journal of Applied Polymer Science, 106, 4148–4156.
• [14] Sun Q.N, Hse C.Y., Shupe T.F., (2011). Characterization and performance of melamine enhanced urea formaldehyde resin for bonding southern pine particle board, Journal of Applied Polymer Science, 119, 3538–3543.
• [15] ASTM G154-12a, (2015). Practice for Operating Fluorescent Ultraviolet (UV) Lamp Apparatus for Exposure of Nonmetallic Materials, ASTM International, West Conshohocken, PA.
• [16] DIN 4768 (1990) Determination of values surface roughness parameters Ra, Rb, Rmax using electrical contact (stylus) institute.
• [17] EN 323 standard, (1999). Wood Based Panels, Determination of the Density, European Committee for Standardization, Brussels, Belgium.
• [18] EN 312 standard, (2003). Particle boards-Specifications. European Committee for Standardization, Brussels, Belgium
• [19] EN 310 standard, (1993). Wood Based Panels, Determination of Modulus of Elasticity in Bending and Bending Strength. European Committee for Standardization, Brussels, Belgium.
• [20] EN 317 standard, (1993). Particle boards and Fiberboards, Determination of Swelling in Thickness after Immersion. European Committee for Standardization, Brussels, Belgium.
• [21] EN 319 standard, (1993). Particle boards and Fiberboards, Determination of Tensile Strength Perpendicular to Plane of the Board. European Committee for Standardization, Brussels, Belgium.