Insulating laminate
First Claim
1. A thermoformable acoustical laminate adapted to absorb sound in a range of frequencies, comprising:
- a substrate layer comprising a polymeric foam lamina bonded to a lamina of nonwoven polymeric fibers;
a thin, flexible relatively dense non-foamed thermoplastic film thermally fused to the nonwoven lamina of said substrate layer without adhesive; and
a finish lamina thermally fused without adhesive to an opposite side of said thermoplastic film.
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Accused Products
Abstract
An insulating laminate, which is particularly suitable for a sound attenuating barrier, such as a contoured vehicle headliner. The disclosed embodiment includes a finish lamina, which may be preferably cloth-like, and a substrate which is preferably structurally stable and self supporting and which may be adapted to absorb sound primarily at predetermined higher frequencies. In one preferred embodiment, a thin flexible film is located between the finish lamina and the substrate which is adapted to absorb sound primarily at relative lower predetermined frequencies. The film may include a pattern of openings or holes designed to absorb sound primarily at predetermined lower frequencies. In the disclosed embodiment, the substrate includes a porous fiber mat, preferably including fibers having a range of thicknesses to improve sound attenuation at higher frequencies, a structural foam lamina and a reinforcing scrim, preferably comprising spunbonded polyester filaments.
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Citations
10 Claims
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1. A thermoformable acoustical laminate adapted to absorb sound in a range of frequencies, comprising:
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a substrate layer comprising a polymeric foam lamina bonded to a lamina of nonwoven polymeric fibers; a thin, flexible relatively dense non-foamed thermoplastic film thermally fused to the nonwoven lamina of said substrate layer without adhesive; and a finish lamina thermally fused without adhesive to an opposite side of said thermoplastic film. - View Dependent Claims (2, 3, 4, 5)
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6. A structurally stable, self-supporting insulating acoustical laminate adapted to absorb sound in a range of frequencies, comprising:
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a substrate layer comprising a reinforcing polymeric fiber scrim layer, a polymeric foam lamina bonded to said scrim layer and a lamina of nonwoven polymeric fibers bonded to said polymeric foam lamina; a thin relatively dense non-foamed thermoplastic film having a plurality of spaced openings through said film bonded to said lamina of nonwoven fibers; and a finish lamina bonded to an opposite side of said thermoplastic film. - View Dependent Claims (7, 8, 9)
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10. A vehicle laminate, said laminate being formed of a composite structure, including a finish surface and an opposite substrate support surface, adapted to be attached to a vehicle, said composite structure comprising:
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a finish lamina, a fiber mat impregnated with a polymeric resin bonded to said finish lamina, said fiber mat including a blend of fibers of different fineness ranging from 5 to 30 denier, a polymeric foam lamina bonded to said fiber mat and a scrim bonded to said foam lamina forming said substrate support surface, said scrim comprising randomly arranged non-woven thermoset polymeric filaments having fineness of about 2 to 10 denier, said filaments bonded at the filament junctions forming a support for said laminate and said substrate support surface.
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Specification