Sound-absorbing material with excellent sound-absorbing performance and method for manufacturing thereof

摘要

Disclosed are a sound-absorbing material with improved sound-absorbing performance and a method for manufacturing the sound-absorbing material. The sound-absorbing material may improve sound absorption coefficient and transmission loss by forming large surface area and air layer, so as to induce viscosity loss of incident sound energy, and may provide light-weight design of a sound absorbing part or material since sound-absorbing performance may be substantially improved using reduced amount of fiber. Further, the sound-absorbing material may improve sound-absorbing performance by using binder fiber having rebound resilience, so as to maintain enough strength between fibers and also to maximize viscosity loss of sound energy transmitted to fiber structure.

主权项

1. A method for manufacturing a sound-absorbing material, comprising
forming a fiber aggregate in a nonwoven fabric form, wherein the fiber aggregate comprises: a non-circular shaped fiber satisfying the following Formula 1; and a binder fiber that partly binds at least a portion of the non-circular shaped fiber, wherein the non-circular shaped fiber is about 50 to 80 wt % based on the total weight of the sound-absorbing material and the binder fiber is about 20 to 50 wt % based on the total weight of the sound-absorbing material,1.5≤P4×π×AFormula⁢⁢1 wherein A is a fiber cross sectional area (μm2), P is a circumference length of fiber cross section (μm).