Sound absorption property of hierarchical three-dimensional flat-knitted spacer fabric with microfiber

Abstract

The harm of sound pollution to human health is nonnegligible. To construct a good sound absorbent fabric, we proposed a combination of flat-knitting and microfibers, which is a simple and effective way to prepare a hierarchical three-dimensional spacer fabric with macroscopic and microscopic pore structure. The effects of spacer layer structure, surface yarn thickness and sea islands composite filaments split durations on sound absorption property were investigated. The sound absorption property was evaluated by the sound absorption coefficient and noise reduction rate. The results show that the sound absorption property of the spacer fabric is improved by splitting, especially under the middle frequency range (1000–3000 Hz). What is more, the noise reduction rate of our layered hierarchical spacer fabric increased by 4.1% with the thickness decreased by 21.1% compared with a recently reported hierarchical porous sound absorbent fabric.

Structural design and impact resistance of three‐dimensional structure‐reinforced flexible polymer composites

“…Noncrimp 3D orthogonal woven fabric (NC3DOW) fabric structure has a high tensile strength, 5,6 while 3D interlock fabric structure has high impact resistance. For instance, 3D woven spacer fabric offers good sound absorption, 7 thermal insulation, 8 and cushioning capabilities. 9,10 Furthermore, 3D woven fabrics are more formable and facilitate the construction of complex shape structures.…”