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루프가 형성된 부직포를 이용한 차량용 고흡음성 헤드라이닝
이수남(Sunam Lee),이원구(Wonku Lee),조병철(Byungcheol Cho),조윤진(Younjin Cho) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
The function of headlining is to raise merchantable quality and comport to by making interior view of automotive more graceful. Preventing damage to the passenger"s head in the event of car crash could be another function of it. Materials of which targets are light weight, high performance, luxury and eco-friendliness have been developed recently. In this study, needle-punched nonwovens which consist of polypropylene fibers and glass fibers were produced by needle-punching process, and then a composite nonwoven of 3D structure was prepared by two looped nonwoven which were made of needle-punched nonwovens by loop-punching process. The absorption coefficient test result showed that the acoustic performance of a developed product having bulky structure was better than those of the conventional product and the durability test result showed that the deformation of a developed product did not occur after environment test.
이수남(Sunam Lee),조병철(Byungcheol Cho),정선경(Sunkyoung Jeoung),이평찬(Pyoungchan Lee) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
The function of headlining is to raise merchantable quality and comport to by making interior view of automotive more graceful. Preventing damage to the passenger’s head in the event of car crash could be another function of it. Moreover, it has NVH performances that decrease noise and vibration due to the rain and wind from roof and also increase quietness by absorbing noise in the car. In this study, sound-absorbing materials using melt-blown nonwoven and needle-punched nonwoven to achieve the high sound absorption performance, and then evaluated to meet a requirement for the automotive component. The test results showed that the acoustic performances of developed products having new laminated structure were better than those of the conventional product.