Environment-friendly Adhesives for Fancy Veneer Bonding of Engineered Flooring to Reduce Formaldehyde and TVOC Emissions

  • Kim, Sumin (Composite Materials and Structures Center, Department of Chemical Engineering and Materials Science, College of Engineering, Michigan State University) ;
  • Kim, Hyun-Joong (Lab. of Adhesion & Bio-Composites, Program in Environmental Materials Science, Department of Forest Sciences, Seoul National University) ;
  • Xu, Guang Zhu (Department of Forest Products, College of Forest Science, Kookmin University) ;
  • Eom, Young Geun (Department of Forest Products, College of Forest Science, Kookmin University)
  • 투고 : 2007.07.18
  • 심사 : 2007.08.22
  • 발행 : 2007.09.25

초록

The objective of this research was to develop environment-friendly adhesives for face fancy veneer bonding of engineered flooring. Urea-formaldehyde (UF)-tannin and melamine-formaldehyde (MF)/PVAc hybrid resin were used to replace UF resin in the formaldehyde-based resin system in order to reduce formaldehyde and volatile organic compound (VOC) emissions from the adhesives used between plywoods and fancy veneers. Wattle tannin powder (5 wt%) was added to UF resin and PVAc (30 wt%) to MF resin. These adhesive systems showed better bonding than commercial UF resin with a similar level of wood penetration. The initial adhesion strength was sufficient to be maintained within the optimum initial tack range. The standard formaldehyde emission test (desiccator method) and VOC analyzer were used to determine the formaldehyde and VOC emissions from engineered flooring bonded with commercial UF resin, UF-tannin and MF/PVAc hybrid resin. By desiccator method, the formaldehyde emission level of UF resin showed the highest but was reduced by replacing with UF-tannin and MF/PVAc hybrid resin. MF/PVAc hybrid satisfied the $E_1$ grade (below $1.5mg/{\ell}$). VOC emission results by VOC analyzer were similar with the formaldehyde emission results. TVOC emission was in the following order: UF > UF-tannin > MF/PVAc hybrid resin.

키워드

참고문헌

  1. An, J.-Y., S. Kim, J.-A Kim, and H.-J. Kim. 2006. Development of simple test method using VOC analyzer to measure volatile organic compounds emission for particleboards. Mokchae Konghak 34(4): 22-30
  2. Brown, S. K. 1999. Occurring of volatile organic compounds in indoor air. In: Organic Indoor Air Pollutants. Occurrence, Measurement, Evaluation. Eds. Salthamrner, T., Wiley-VCH. Weinheim 171-184
  3. Graldine C., L. Didier, L. Stefan, and J. M. Hans. 2000. XPS and ToF-SIMS study of freezedried and thermally cured melamine-formaldehyde resins of different molar ratios. Surface and Interface Analysis 29(7): 431-443 https://doi.org/10.1002/1096-9918(200007)29:7<431::AID-SIA886>3.0.CO;2-1
  4. Japanese Industrial Standard (JIS A 1460-2001), Building boards determination of formaldehyde emission-Desiccator method, Tokyo, Japanese Standard Association, Standardization Promotion Department. 2001
  5. Kim, S. and H.-J. Kim. 2004. Evaluation of Formaldehyde Emission of Pine & Wattle Tannin-based Adhesives by Gas Chromatography. Holz als Roh- und Werstoff. 62(2): 101-106 https://doi.org/10.1007/s00107-003-0441-2
  6. Kim, S. and H.-J. Kim. 2005a. Effect of addition of polyvinyl acetate to melamine-formaldehyde resin on the adhesion and formaldehyde emission in engineered flooring. International Journal of Adhesion and Adhesives 25: 456-461 https://doi.org/10.1016/j.ijadhadh.2005.01.001
  7. Kim, S. and H.-J. Kim. 2005b. Comparison of standard methods and gas chromatography method in determination of formaldehyde emission from MDF bonded with formaldehyde-based resins. Bioresource Technology 96: 1457-1464 https://doi.org/10.1016/j.biortech.2004.12.003
  8. Kim, S. and H.-J. Kim. 2006. Initial Tack and Instantaneous Adhesion of MFfPVAc hybrid Resins Used as Adhesives for Composite Flooring Materials. Journal of Adhesion Science and Technology 20(7): 705-722 https://doi.org/10.1163/156856106777412437
  9. Kim, S. and H.-J. Kim. 2007. Miscibility and morphology in blends of melamine-formaldehyde resin and poly(vinyl acetate) for surface materials bonding. Macromolecular Materials and Engineering 292(3): 339-346 https://doi.org/10.1002/mame.200600354
  10. Kim, S., H.-J. Kim, H-S Kim, and H. H. Lee. 2006. Effect of Bio-Scavengers on the Curing Behavior and Bonding Properties of Melamineformaldehyde Resin. Macromolecular Materials and Engineering 291(9): 1027-1034 https://doi.org/10.1002/mame.200600213
  11. Risholm-Sundman, M., M. Lundgren, E. Vestin, and P. Herder. 1998. Emission of acetic acid and other volatile organic compounds from different species of solid wood. Holz als Roh- und Werkstoff 56(2): 125-129 https://doi.org/10.1007/s001070050282
  12. Roos, A., C. Creton, M. B. Novikov, and M.M. Feldstein. 2002. Viscoelasticity and tack of poIy(vinyl pyrrolidone)-poly(ethylene glycol) blends. Journal of Polymer Science Part b: Polymer Physics 40: 2395-2409 https://doi.org/10.1002/polb.10279
  13. Rothweiler, H., P. A. Wager, and C. Schlatter. 1992. Volatile organic compounds and some very volatile organic compounds in new and recently renovated buildings in Switzerland. Atmospheric Environment 26: 2219-2225 https://doi.org/10.1016/0960-1686(92)90411-D
  14. Singh, A. P., C. R. Anderson, J. M. Warnes, and J. Matsumura. 2002. The effect of planing on the microscopic structure of Pinus radiata wood cells in relation to penetration of PVA glue. 60(5): 333-341 https://doi.org/10.1007/s00107-002-0321-1
  15. Wiglusz, R., E. Sitko, G. Nikel, J. Jarnuszkiewicz, and B. Igielska. 2002. The effect of temperature on the emission of formaldehyde and volatile organic compounds (VOCs) from laminate flooring. Building and Environment 37: 41-44 https://doi.org/10.1016/S0360-1323(00)00091-3
  16. Wolkoff, P., P. A. Clausen, P. A. Nielsen, and L. M$\varphi$lhave. 1991. The Danish twin apartment study; part I: formaldehyde and long-term VOC measurements. Indoor Air 4: 478-490