Automotive sound-absorbing material
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United States of America Patent
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Issued Date -
Oct 8, 2009
app pub date -
Apr 8, 2008
filing date -
Apr 8, 2008
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Abandoned
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Abstract
A thin and light-weight automotive sound-absorbing material with a superior sound-absorbing property, which can be used, for example, for automotive insulator to keep the interior of an automobile quiet. This automotive sound-absorbing material has a laminate structure comprising a sound-absorbing layer, an intermediate layer, and a sound-absorbing layer. The intermediate layer comprises a film made of thermoplastic resin with a thickness of 10 to 100μ, on which small pores are uniformly opened in such a manner that the aperture ratio would be 0.05 to 5%. The sound-absorbing layers comprise an aggregate of fibers such as felt, glass wool, etc. or porous synthetic resin layer, such as urethane foam, etc.
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