CAJ | 학술논문

以熔喷丙纶非织造材料和玻璃纤维水刺非织造材料为受声面和背衬层，通过热粘合方式制成双层复合非织造材料基吸声体。通过分析吸声体受声面和背衬层非织造材料的厚度、面密度、孔径、孔隙率等结构参数与复合吸声体的吸声系数之间的关系，探讨各层非织造材料结构参数对复合吸声体吸声性能的影响。实验结果表明，随着熔喷丙纶非织造材料和玻璃纤维水刺非织造材料厚度和面密度的增加，吸声体中高频段吸声系数显著提高；受声面和背衬层的孔径尺寸和孔隙率的变化对双层复合非织造材料基吸声体的吸声性能影响较为显著。
이용분병륜비직조재료화파리섬유수자비직조재료위수성면화배츤층，통과열점합방식제성쌍층복합비직조재료기흡성체。통과분석흡성체수성면화배츤층비직조재료적후도、면밀도、공경、공극솔등결구삼수여복합흡성체적흡성계수지간적관계，탐토각층비직조재료결구삼수대복합흡성체흡성성능적영향。실험결과표명，수착용분병륜비직조재료화파리섬유수자비직조재료후도화면밀도적증가，흡성체중고빈단흡성계수현저제고；수성면화배츤층적공경척촌화공극솔적변화대쌍층복합비직조재료기흡성체적흡성성능영향교위현저。
Dual-layered nonwoven absorbers are manufactured by thermally bonding the melt blown polypropylene nonwoven and hydroentangled glass fiber nonwoven that are used as sound reception layer and backing layer, respectively. The effect of the structure parameters of sound reception layer and backing layer on the sound absorption coefficient of absorber is explored by analyzing the relationships between thickness, area density, pore size, porosity and sound absorption coefficient. Experiment results indicate that the sound absorption coefficient of nonwoven absorber increases significantly with the increase of the thickness and area density of melt blown polypropylene nonwoven and hydroentangled glass fiber nonwoven. Additionally, the pore size and porosity of sound reception layer and backing layer are distinct impact factors of sound absorption coefficient of dual-layered nonwoven absorber.