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A preliminary investigation on kapok/polypropylene nonwoven composite for sound absorption

机译:木棉/聚丙烯无纺布吸声复合材料的初步研究

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摘要

The use of kapok fibre with polypropylene fibre for the development of sound absorptive nonwoven materials has been explored. Three different blend ratios of kapok and polypropylene fibres, namely 30:70, 40:60 and 50:50 have been used. The composites are characterized for their physical properties, namely thickness, density, porosity and sound absorption characteristics in the frequency range 250 - 2000 Hz. The values of sound absorption coefficient and noise reduction coefficient obtained indicate that the kapok fibre composites possess very good sound absorption behaviour in the entire frequency range. The uncompressed kapok/polypropylene nonwoven composite of 30:70 blend ratio with high bulk density and low porosity is found to give the best performance when used by providing air gap behind the composite.
机译:已经研究了将木棉纤维和聚丙烯纤维一起用于开发吸声非织造材料。木棉和聚丙烯纤维的三种不同的混合比,即30:70、40:60和50:50已被使用。复合材料的特征在于其物理性质,即在250-2000 Hz频率范围内的厚度,密度,孔隙率和吸声特性。所获得的吸声系数和降噪系数的值表明,木棉纤维复合材料在整个频率范围内具有非常好的吸声性能。已发现,混合比为30:70的未压缩木棉/聚丙烯非织造复合材料具有高堆积密度和低孔隙率,在使用时通过在复合材料后方留有空隙来提供最佳性能。

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