The present invention relates to a sound absorption material for a vehicle, comprising: a first sound absorption layer including polyurethane (PU) foam and having a sound absorption accommodation groove on one side; and a second sound absorption layer including porous expanded polypropylene (PEPP) foam consisting of open cells, accommodated in the sound absorption accommodation groove, stacked and attached on the first sound absorption layer and having a plurality of damping grooves improving sound insulation and sound absorption performance on the upper surface. 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 포함하고 일측에 흡음층 수용홈이 구비되는 제 1 흡음층, 및 오픈셀(Open cell)로 구성된 다공성 발포 폴리프로필렌(PEPP)폼을 포함하고 흡음층 수용홈에 수용되어 제 1 흡음층에 적층 부착되어 구비되며 그 상면에 차음 및 흡음 성능 향상을 향상시키는 댐핑홈이 복수개 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
IPC: | B32B LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM , Schichtkörper, d.h. aus Ebenen oder gewölbten Schichten, z.B. mit zell- oder wabenförmiger Form, aufgebaute Erzeugnisse / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR |
ADSORPTION APPARATUS FOR NOISE ABSORBING MATERIAL OF VEHICLE
European Patent Office | 2021
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