Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
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A Method of Measuring Wood Failure Percentage of Wood Specimens Bonded with Melamine-Urea-Formaldehyde Resins Using I mage Analysis

  • KIM, Minseok (Department of Wood and Paper Science, Kyungpook National University) ;
  • PARK, Byung-Dae (Department of Wood and Paper Science, Kyungpook National University)
  • Received : 2021.02.04
  • Accepted : 2021.05.20
  • Published : 2021.05.25
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Abstract

Transparent and colorless melamine-urea-formaldehyde (MUF) resins make it difficult to identify the area of wood failure percentage (WFP) in the fracture surface of bonded wood specimens. Therefore, in this study, we develop a method of measuring WFP after the adhesion strength measurement of MUF resins under shear stress. The fractured wood surface of b lock shear strength (BSS) specimens bonded with cold-setting MUF resins at three melamine contents (20%, 30%, and 40%) was marked black, and then, WFP was accurately measured via image analysis. WFP values measured using this method consistently increased with BSS as the melamine content increased, showing the reliability of this new method. The results suggested that this new method is useful and reliable for measuring the WFP of the fracture surface of wood specimens bonded with colorless adhesives such as urea-formaldehyde, MUF, and melamine-formaldehyde resins.

Keywords

Acknowledgement

This work is supported by the Korea Forestry Promotion Institute (Grant No. 2019143D10-1921-AB01)

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