Patent ID: 11872945
Assignee: KOTOBUKIYA FRONTE CO., LTD.
Field: Surface technology, coating (Chemistry)
Classification: CPC B  G | IPC B

Claim 0:
1. A sound-absorbing material for a vehicle, having a multilayer structure, the material comprising:
a core layer having tubular cells, the tubular cells being arranged in a plurality of rows, wherein each of the cells in the core layer has a closed surface at one end and an open end at another end, and the open ends of the cells are arranged on both sides of the core layer such that rows of the open ends of the cells are in every other row; and
a first airflow-blocking resin film layer adhered to one surface of the core layer,
wherein the closed surfaces of the cells arranged in every other row serve as a surface for adhering the first airflow-blocking resin film layer and the core layer, and
wherein a relationship between a Young's modulus E1 (MPa) of the first airflow-blocking resin film layer and a surface density M1 (g/m2) of a layer structure on the first airflow-blocking resin film layer side with respect to the core layer is 0.5<E1/M1<21.