Automotive sound-proof materials and damping materials therefor
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United States of America Patent
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Mar 10, 1992
Grant Date -
N/A
app pub date -
May 18, 1989
filing date -
May 18, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
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.
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