| 摘要 |
<p>Disclosed is a sound-absorbing coating material comprising an olefin-based resin foam which contains polypropylene, exhibits good sound-absorbing performance even in a thin-walled state and has high dimensional stability, characterized in that the expansion ratio of the foam is 2.7 to 4.0 and 70% or greater of the total cells in the foam have at least one opening so that open cells are formed. The average diameter of the cells in the foam is preferably 50 µm to 200 µm. The sound-absorbing coating material is preferably provided with a non-foamed skin layer on the surface thereof.</p> |
