The present invention relates to a sound absorption material for a vehicle, consisting of: a first sound absorption layer including polyurethane (PU) foam; and a second sound absorption layer including porous expanded polypropylene (PEPP) foam consisting of open cells, and stacked on the first sound absorption layer. Accordingly, sound absorption performance can be increased and a separation phenomenon between the first sound absorption layer and the second sound absorption layer can be reduced.
본 발명은 차량용 흡음재에 관한 것으로, 폴리우레탄(PU)폼을 포함하는 제 1 흡음층, 및 오픈셀(Open cell)로 구성된 다공성 발포 폴리프로필렌(PEPP)폼을 포함하고 제 1 흡음층에 적층되어 구비되는 제 2 흡음층을 포함하여 구성됨으로써, 흡음 성능을 향상시키고 제 1 흡음층과 제 2 흡음층 간의 박리 현상을 저감시킨다.
NOISE ABSORBING MATERIAL FOR VEHICLE
차량용 흡음재
2018-02-07
Patent
Electronic Resource
Korean
ADSORPTION APPARATUS FOR NOISE ABSORBING MATERIAL OF VEHICLE
European Patent Office | 2021
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