Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
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Flame Retardancy of Plywood Treated with Various Water Glass Concentration and Additives

물유리의 농도와 첨가제 종류에 따른 방염제의 성능

  • PARK, Sohyun (Department of Forest Products, National Institute of Forest Science) ;
  • HAN, Yeonjung (Department of Forest Products, National Institute of Forest Science) ;
  • SON, Dong Won (Department of Forest Products, National Institute of Forest Science)
  • Received : 2020.06.16
  • Accepted : 2020.12.17
  • Published : 2021.01.25
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Abstract

The carbonized length and area of plywood by the various spreading concentration of water glass and the type of additives were measured in accordance with the 45° MecKel's burner method of the fire protection performance standard of the Korean National Fire Agency. As a result of treating water glass with a concentration of 20 to 50 % on plywood, the flame retardancy tended to increase in proportion to the concentration of water glass. However, the optimum concentration of water glass was determined to be 30 % due to the efflorescence and sticky on the surface of plywood treated with high-concentration water glass of more than 30 %. As a result of the experiment by adding different proportions of additives to the water glass with concentration of 30 %, the standard of flame performance standard was satisfied under the conditions with the addition of 15% potassium hydroxide and 1-10% aluminum hydroxide, respectively. On the other hand, there were no significant difference in the flame retardancy by adding magnesium sulfate. These results about the flame retardancy of plywood by water glass and additives were expected to be basic data for improving flame-retardant treated wood.

소방청의 방염성능기준에 제시된 45°멕켈 버어너법을 이용하여 물유리 농도와 첨가제 종류에 따른 합판의 탄화길이 및 면적 등의 방염성능을 측정하였다. 합판에 농도 20-50%의 물유리를 처리한 결과, 방염성능은 물유리의 농도와 비례하는 경향을 나타냈다. 그러나 30%를 넘는 고농도의 물유리로 처리된 합판의 표면에서 백화현상과 끈적임이 발생하여 농도 30%를 최적 조건으로 결정하였다. 농도 30%의 물유리에 서로 다른 비율의 첨가제를 추가하여 실험을 수행한 결과, 수산화칼륨 15% 조건과 수산화알루미늄 1-10%의 조건에서 방염성능 기준을 만족하였다. 반면에 황산마그네슘은 방염성능에 크게 영향을 미치지 않았다. 물유리와 첨가제에 따른 방염성능의 결과는 방염제를 활용한 불연재에 대한 기초자료로 활용될 것으로 기대된다.

Keywords

References

  1. Cha, J.M., Hyun, S.H., Kim, I.B., Yoon, M.O. 2011. A study on the flame retardant performance of MDF wood according to flame retardant treatment method. Journal of Korean Institute of Fire Science & Engineering 25(6): 146-155.
  2. Choi, Y.S., Park, J.W., Lee, J.H., Shin, J.H., Jang, S.W., Kim, H.J. 2018. Preparation of EVA/Intumescent/Nano-clay composite with flame retardant properties and cross laminated timber (CLT) application technology. Journal of the Korean Wood Science and Technology 46(1): 73-84. https://doi.org/10.5658/WOOD.2018.46.1.73
  3. Cho, S.H., Ha, J.W., Ha, J.H. 2002. Enhancement of flame retardancy by inorganic.organic hybrid flame retardant coating(I). Theories and Applications of Chemical Engineering 8(2): 4962-4965.
  4. Furuno, T., Imamura, Y. 1998 Combinations of wood and silicate. Part 6. Biological resistances of wood-mineral composites using water glass-boron compound system. Wood Science and Technology 32(3): 161-170. https://doi.org/10.1007/BF00704839
  5. Huusmann, O. 2001. Process for preparing particles covered with a layer of water glass and articles comprising such covered particles. U.S. Patent No. 6,248,284. Washington DC: U.S. Patent and Trademark Office.
  6. Jang, B.N., Choi, J. 2009. Research trend of frame retardant and frame reatardant resin. Polymer Science and Technology 20(1): 8-15.
  7. Kim, J.I., Park, J.Y., Kong, Y.T., Lee, B.H., Kim, H.J., Roh, J.K. 2002. Performance on flame-retardant polyurethane coatings for wood and wood-based materials. Journal of the Korean Wood Science and Technology 30(2): 172-179.
  8. Kim, J.B., Lee, S.Y. 2016. The combustion gas hazard assessment of main building materials. Journal of the Korean Wood Science and Technology 44(5): 639-654. https://doi.org/10.5658/WOOD.2016.44.5.639
  9. Korean Agency for Technology and Standards. 2017. Liquefied petroleum gas. KS M 2150. Korean Agency for Technology and Standards, Eumseonggun, Chungcheongbuk-do, Republic of Korea.
  10. Korean National Fire Agency. 2019. Standard for flame retardancy. NFA Notification No. 2019-2. Korean National Fire Agency, Sejong-si, Republic of Korea.
  11. Lee, C., Song, S.H., Kim, H.M., Kim, H.J., Choi, K., Lee, M.S. 2007. Toxicity assessment of tetrabromobisphenol a with the benthic amphipod, hyalella azteca. The Korean Society of Environmental Toxicology 22(2): 157-163.
  12. Lee, S.J., Thole, V. 2018. Investigation of modified water glass as adhesive for wood and particleboard: Mechanical, thermal and flame retardant properties. European Journal of Wood and Wood Products 76(5): 1427-1434. https://doi.org/10.1007/s00107-018-1324-x
  13. Liang, J., Zhang, Y. 2010. A study of the flame-retardant properties of polypropylene/Al(OH)3/Mg(OH)2 composites. Polymer International 59(4): 539-542. https://doi.org/10.1002/pi.2733
  14. Medina, L.A., Schledjewski, R. 2009. Water glass hydrophobic and flame retardant additive for natural fiber reinforced composites. Journal of Nanostruct Polym Nanocompos 5: 107-114.
  15. Mostashari, S.M., Baghi, O., Moafi, H.F. 2008. A diagonal comparison between the effectiveness of hydrated magnesium sulfate as a flame-retardant and lithium sulfate as an inert additive incorporated on a cellulosic fabric. Cellulose Chemistry and Technology 42(1-3): 129-134.
  16. Mostashari, S. M., Nia, Y. K., Baie, S. 2007. Thermogravimetric studies of deposited potash impregnated for flame retardancy into a cotton fabric. Chinese Journal of Chemistry 25(7): 926-929. https://doi.org/10.1002/cjoc.200790180
  17. Obut, A., Girgin, I. 2006. Preparation of sodium borosilicates using sodium silicate and boric acid. Journal of Sol-Gel Science and Technology 39(2): 79-83. https://doi.org/10.1007/s10971-006-8974-6
  18. Oh, Y., Kim, S.K., Peck, D.H., Jang, J.S., Kim, J., Jung, D.H. 2014. Improved prerformance using tungstem carbide/carbon nanofiber based anode catalysts for alkaline direct ethanol fuel cells. International Journal of Hydrogen Energy 39(28): 15907-15912. https://doi.org/10.1016/j.ijhydene.2014.02.010
  19. Park, H.J., Kang, Y.G., Kim, H. 2005. A study on combustion characteristics of fire retardant treated wood. Journal of the Korean Wood Science and Technology 33(4): 38-44.
  20. Park, J.I., Kim, S.H., Hong, J.K., Lee, M.W. 2006. A study on incombustibility of building service system insulation material. Korean Journal of Air-Conditioning and Refrigeration Engineering Summer annual conference Proceedings 999-1005.
  21. Park, S., Han, Y., Son, D.W. 2019. Analysis of combustion characteristics of five domestic species. Journal of the Korea Furniture Society 30(4): 303-311. https://doi.org/10.22873/KOFUSO.2019.30.4.303
  22. Pereyra, A.M., Giudice, C.A. 2009. Flame-retardant impregnants for woods based on alkaline silicates. Fire Safety Journal 44(4): 497-503. https://doi.org/10.1016/j.firesaf.2008.10.004
  23. Seekamp, H. 1954. Die Klassifizierung der Brennbarkeit holzhaltiger Platten (Classification of the combustibility of wood-containing boards) (in German). Holz Roh Werkst 12(5): 189-197. https://doi.org/10.1007/BF02626147
  24. Seo, H.J., Kim, N.K., Jo, J.M., Lee, M.C. 2017. Analysis on the flame-retardant performance and hazards in gas products for water-soluble flame-retardant-chemicals treated woods. Journal of Korea Society and Harzard Mitigation 17(4): 173-179.
  25. Shin, J.H., Lee, K.K., Ahn, Y.G., Na, Y.C. 2009. Analysis of decabromodiphenyl ether in textiles treated by flame retardants (FRs). Journal of Korean Society of Living Environment System 16(2): 83-88.
  26. Shin, J.H., Beak, Y.J. 2013. Componential analysis of textiles treated by halogen type flame retardants. The Korean Society of Community Living Science 460.
  27. Son, D.W., Kang, R.K., Lee, D.H., Park, S.B. 2013. Decay Resistance and Anti-mold Efficacy of Wood Treated with Fire Retardants. Journal of the Korean Wood Science and Technology 41(6): 559-565. https://doi.org/10.5658/WOOD.2013.41.6.559
  28. Stark, J., Wicht, B. 1998. Anorganische Bindemittel: Zement-Kalk- spezielle Bindemittel (Inorganic binders: cement-chalk-special binding agents) (in German). Bauhaus-University, Weimar.
  29. Yamaguchi, H. 2005. Silicic acid/boric acid complexes as ecologically friendly wood preservatives. Forest Products Journal 55(1): 88-92.
  30. White, R.H. 2000. Charring rate of composite timber products. The proceedings of Wood and Fire Safety 2000, Part 1, 4th International Scientific Conference, May, 14-19.