| 摘要 |
PURPOSE:To provide light soundproof material, while sufficient soundproof effect is kept. CONSTITUTION:A resin cotton 4 impregnated with thermosetting resin such as phenol resin. and the object formud integrally with a skin layer 5 are provided on one surface of a honeycomb plate 1 through a sound-absorbing layer, and felt is provided on the other surface thereof, and such a structure can be used as soundproof material by pressing. |
