Article
  • A Study on the Characteristic of Sound Absorption of the Polyester Non-Woven Fabrics Used for the Automobile Sound Absorption Material
  • Byun HS, Lee TG
  • 폴리에스터 부직포를 이용한 자동차용 흡음재의 흡음특성에 관한 연구
  • 변홍식, 이태관
Abstract
The sound absorption materials with polyester (PET) were prepared for automobile. They consist of 3 layers with different size of PET fiber(3 and 15 deniers) in order to optimize the characteristic of sound absorption, and with various densities (895~1790 g/cm(2)) by controlling the weight of PET of each layer, They were also compared with the commercial sound absorption materials made of glass wool. It was shown that the new PET had better absorption capability in both high and low frequency regions than that of the commercial material. It was revealed also that the density and the thickness of PET played an important role to determine the capability of sound absorption. The NRC (noise reduction coefficient) was increased by 22-39% with optimized PET sound absorption material. It should be noted that the PET can substitute the glass wool, a commercial sound absorption material, in view of environment and as well as recycle capability of sound absorption.

폴리에스터를 이용하여 새로운 자동차용 흡음재를 개발하였다. 흡음의 효과를 최대화시키기 위하여 PET 섬유의 크기를 3과 15 denier로 달리하여 3개의 층으로 제작하였으며, 이때 각층의 중량을 조절하여 밀도를 변화시켰다(895∼1790 g/㎠). 또한 PET흡음재의 상업성을 알아보기 위하여 시판하고 있는 glass wool로 제조된 흡음재와 비교 분석하였다. 새로운 PET는 시판되고 있는 glass wool 흡음재보다 저주파와 고주파대역 모두에서 더 우수한 흡음성능을 보여주었다. 또한 흡음재의 밀도와 두께가 흡음성능에 중요한 영향이 있으며, 최적화된PET흡음재는 시판되고 있는 흡음재와 비교하여 NRC (noise reduction coefficient)가 약 22-39% 향상되었다. 따라서 PET는 성능은 물론이고 환경과 재활용면에서 glass wool을 충분히 대체할 수 있으리라 생각한다.

Keywords: Polyester; Sound Absorption; Multilayer Structure; Recycle

References
  • 1. Noureddine A, Panneton R, Noise Control Eng. J., 44(5), 235 (1996)
  •  
  • 2. Zorumski WEAircraft Flyover Noise Prediction, Pro.Noise Con.-77, Hampton, Va, Octover (1977)
  •  
  • 3. Lee YS, Kim ID, Lee JG, J. Korea Soc. Automotive Engineers, 14(4), 68 (1992)
  •  
  • 4. Anderton D, Grover EC, Lalor N, Priedd TOrigins of Reciprocating Engine Noise-It's Chatacteristics Prediction and Control, ASME 70-WA/DGP-3 (1970)
  •  
  • 5. Kitahara T, Terada I, Waranabe T, J. Veh. Des., 5, 490 (1984)
  •  
  • 6. Guy RW, Noise Control Eng. J., 33, 117 (1989)
  •  
  • 7. Fuller CR, von Flotow AH, IEEE Control Sys. Mag., 15(6), 9 (1995)
  •  
  • 8. Finegan IC, Gibson RF, Composite Structures, 44, 89 (1999)
  •  
  • 9. Moulder RSound-Absoptive Material, in Handbook of Acoustical Measurement and Noise Control, ed. by C.M. Harris, ch. 30, McGraw-Hill, N.Y. (1991)
  •  
  • 10. Gibson RFPrinciples of Composite Material Mechanics, McGraw-Hill, N.Y. (1994)
  •  
  • 11. Hwang SJ, Gibson RF, J. Composite Mat., 26, 2585 (1992)
  •  
  • 12. Byun HSDevelopment of Sound Absorption Materials and Deadeners Reducing the Vehicle Noise, SMBA Technology Innovation and Development Business Report (2000)
  •  
  • 13. Wang PC, Fridrich RJ, J. Composite Mat., 30, 1629 (1996)
  •  
  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2022 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 2001; 25(3): 427-434

    Published online May 25, 2001

  • Received on Dec 11, 2000