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Automotive sound-proof materials and damping materials therefor

  • US 5,094,318 A
  • Filed: 05/18/1989
  • Issued: 03/10/1992
  • Est. Priority Date: 05/18/1988
  • Status: Expired due to Term
First Claim
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1. An automotive sound-proof material comprising a damping material, a sound-absorption material and a surface material, wherein:

  • said damping, sound absorption and surface materials are integrated together;

    said damping material including a plastic constraining material, moldable at ambient temperature, selected from a group consisting of polyolefins and vinyl chloride resins and an adhesive damping sheet also moldable at ambient temperature and formed from materials selected from a group consisting of asphalt, petroleum resin, polybutadiene, isocyanate, rubber, filler and mixtures thereof effective in forming said damping sheet;

    said sound absorption material selected from a group consisting of foamed synthetic resins, felts, non-woven fabrics, synthetic resin fibers and mineral fibers;

    said surface material, moldable at ambient temperature, being formed into a sheet from at least one or more materials selected from a group consisting of straight asphalt, blown asphalt, a mixture of straight and blown asphalt, a rubbery material selected from a group consisting of styrene-butadiene base synthetic rubber, butyl base rubber, natural rubber and any mixtures thereof, and a synthetic resin material with suitable fillers selected from a group consisting of calcium carbonate, talc, clay, barium sulfate, mica and mixtures thereof;

    whereby said sound-proof material is integrally attachable to an automotive sheet material at ambient temperature.

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