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<p>This paper develops and compares the thermal insulation, sound absorption, and air permeability of the functional nonwoven materials with and without the corrugated structure. The corrugated structure formed by mechanical pressure increases the surface mass and reduces the volume porosity, thereby slightly improving the thermal conductivity of the samples. The thermal resistance change is relatively complex, with the corrugated structure increasing the thermal resistance of the thinner flat sample by 12%. However, the thermal resistance of the thicker flat sample remained unchanged or decreased slightly. Thermal insulation degree analysis further confirms that corrugated structure generally enhances insulation, although reduced thickness in certain cases may limit this effect. Sound absorption testing reveals that the original materials exhibit poor acoustic performance, structural modifications significantly improve their performance. The mean value of the sound absorption coefficient for samples with corrugated structure can reach above 0.5, which is more than 30% higher than that of samples with flat structure. Air permeability testing shows that structural changes will reduce it, but it will remain above 1500&#xa0;l/m²/s. Overall, the findings demonstrate that the corrugated structure is an effective strategy for improving the thermal and acoustic performance while maintaining acceptable breathability for construction applications.</p>

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Corrugated structural effects on the thermal and sound properties of functional nonwoven materials for construction applications

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年12月10日

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  • Dan Wang,
  • Mohanapriya Venkataraman,
  • Shi Hu,
  • Dana Kremenakova,
  • Jiri Militky

摘要

This paper develops and compares the thermal insulation, sound absorption, and air permeability of the functional nonwoven materials with and without the corrugated structure. The corrugated structure formed by mechanical pressure increases the surface mass and reduces the volume porosity, thereby slightly improving the thermal conductivity of the samples. The thermal resistance change is relatively complex, with the corrugated structure increasing the thermal resistance of the thinner flat sample by 12%. However, the thermal resistance of the thicker flat sample remained unchanged or decreased slightly. Thermal insulation degree analysis further confirms that corrugated structure generally enhances insulation, although reduced thickness in certain cases may limit this effect. Sound absorption testing reveals that the original materials exhibit poor acoustic performance, structural modifications significantly improve their performance. The mean value of the sound absorption coefficient for samples with corrugated structure can reach above 0.5, which is more than 30% higher than that of samples with flat structure. Air permeability testing shows that structural changes will reduce it, but it will remain above 1500 l/m²/s. Overall, the findings demonstrate that the corrugated structure is an effective strategy for improving the thermal and acoustic performance while maintaining acceptable breathability for construction applications.