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<p>Melamine particleboard (MFPB) is extensively utilized in the construction and decoration industries. However, when exposed to natural environmental conditions, its flame-retardant properties gradually deteriorate due to humidity-related factors. This study investigates the aging mechanisms and flame-retardant characteristics of MFPB under dry and wet aging conditions. The findings indicate that the volatile matter content in MFPB exhibits a negative correlation with aging duration, whereas fixed carbon demonstrates a positive correlation with ash content. The stability of cellulose, hemicellulose, and melamine–formaldehyde resin (MF) is relatively poor, and aging induces the decomposition of volatile components within MFPB, thereby diminishing its flame-retardant performance. The limiting oxygen index (LOI) of MFPB shows an overall declining trend, transforming it from a flame-retardant material into a combustible one. After 60&#xa0;days of exposure to alternating dry and wet aging conditions, the time-to-ignition (TTI) of MFPB decreased by 23&#xa0;s compared to unaged samples. Nevertheless, the aging process exerts an inhibitory effect on the heat release rate, potentially increasing the risk of secondary hazards associated with fires. These research outcomes provide a theoretical foundation for predicting the effective service life of engineered wood products and advancing the development of flame-retardant materials.</p>

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The effect of dry–wet aging on the aging mechanism and flame-retardant properties of melamine particleboard

  • 期刊论文

  • 发表日期：

    2025年12月1日

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  • Luoxin Huang,
  • Yanni Zhang,
  • Shiyue Ling,
  • Dan Yang

摘要

Melamine particleboard (MFPB) is extensively utilized in the construction and decoration industries. However, when exposed to natural environmental conditions, its flame-retardant properties gradually deteriorate due to humidity-related factors. This study investigates the aging mechanisms and flame-retardant characteristics of MFPB under dry and wet aging conditions. The findings indicate that the volatile matter content in MFPB exhibits a negative correlation with aging duration, whereas fixed carbon demonstrates a positive correlation with ash content. The stability of cellulose, hemicellulose, and melamine–formaldehyde resin (MF) is relatively poor, and aging induces the decomposition of volatile components within MFPB, thereby diminishing its flame-retardant performance. The limiting oxygen index (LOI) of MFPB shows an overall declining trend, transforming it from a flame-retardant material into a combustible one. After 60 days of exposure to alternating dry and wet aging conditions, the time-to-ignition (TTI) of MFPB decreased by 23 s compared to unaged samples. Nevertheless, the aging process exerts an inhibitory effect on the heat release rate, potentially increasing the risk of secondary hazards associated with fires. These research outcomes provide a theoretical foundation for predicting the effective service life of engineered wood products and advancing the development of flame-retardant materials.