Study on the Sound Absorption Properties of Recycled Polyester Nonwovens through Alkaline Treatment and Dimple Processing

Author:

Yu Gyeong Cheol1,Park Jeong Jin2ORCID,Kang Eun Hye1ORCID,Lee Sun Young3ORCID,Huh Youl4,Lee Seung Goo1

Affiliation:

1. Department of Applied Organic Materials Engineering, Chungnam National University, Daejeon 34134, Republic of Korea

2. Department of Organic Materials Engineering, Chungnam National University, Daejeon 34134, Republic of Korea

3. Research Institute for Applied Chemistry and Biological Engineering, Chungnam National University, Daejeon 34134, Republic of Korea

4. Department of Applied Chemistry and Biological Engineering, Graduate School of Industry, Daejeon 34134, Republic of Korea

Abstract

This study focused on manufacturing efficient automobile sound-absorbing materials through alkaline treatment and dimple processing of recycled polyethylene terephthalate (rPET) nonwoven fabric. The rPET nonwoven fabric was produced with a sound-absorbing material through compression molding. It was improved through the development of porous sound-absorbing materials through alkaline treatment and resonant sound-absorbing materials through dimple processing. As a result of morphological analysis, alkaline treatment showed that pore size and air permeability increased according to temperature and concentration increase conditions. On the other hand, dimple processing caused a decrease in air permeability and a decrease in pores due to yarn fusion, and as the dimple diameter increased, the sound-absorbing coefficient increased in the 5000 Hz band. Finally, it was judged that effective sound absorption performance would be improved through a simple process through alkaline treatment and dimple processing, and thus there would be applicability in various industrial fields.

Funder

Ministry of Trade, Industry and Energy

Publisher

MDPI AG

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