Automotive sound-proof materials and damping materials therefor

摘要

A sound-absorption material for an automobile includes a damping material, a sound-absorption material and a surface material. The damping, sound-absorption and surface materials are integrated together. The damping material includes a moldable plastic constraining material and an adhesive damping sheet containing a petroleum resin. The sound-proof material is integrally attachable to an automotive sheet material such as a dashboard.