针刺中空短纤非织造布层合涤纶增强橡胶基材料的吸声性能

Sound absorption properties of needle-punched hollow staple nonwoven laminated polyester staple reinforced rubber-based materials

测试分析了针刺中空短纤非织造布与四孔中空涤纶短纤增强氢化羧基丁腈橡胶基材料(HF材料)层合的双层和三层材料的吸声性能。结果表明:双层材料以非织造布为入射面时,呈现多孔吸声材料特性,整体吸声性能相比单一材料有所提升;以HF材料为入射面时,双层材料在中低频域的吸声性能显著改善,但中高频域的吸声性能下降。三层材料整体吸声性能优于双层材料,其各频域的吸声性能均较优,且以HF材料为芯层的三层材料更优。通过增大HF材料厚度或采用较厚同时孔隙率较大的针刺中空短纤非织造布,可进一步提高层合材料的吸声性能。

Sound absorption properties of double and triple layer materials with needle-punched hollow staple nonwoven laminated 4-hole hollow polyester staple reinforced hydrogenated carboxyl nitrile rubber-based material(HF material)were tested and analyzed.The results showed that when the nonwoven side of the double layer material was used as the incident surface,which showed the sound absorption properties of porous materials,and the overall sound absorption property was improved compared with the single material.When the HF material side of the double layer material was used as the incident surface,the sound absorption performance in the middle and low frequency range significantly improved but declined in the middle and high frequency range.The overall sound absorption property of the triple layer material was better than that of the double layer material,and better in all frequency range.The sound absorption property of the triple layer material with HF material in the middle layer was the best.By increasing the thickness of the HF material or adopting thicker needle-punched hollow staple fiber nonwoven with higher porosity,the sound absorption property of the laminated material could be further improved.