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US 6,790,520 B1Granted
Vibration dampening laminate
AssigneeCollins & Aikman Products Co.
InventorsJohn Todd, Robert S. Boyd, Melvyn J. Care
Life of this patent
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Abstract
The present invention provides a vibration dampening laminate that is lightweight and has superior sound insulation and vibration dampening properties. The vibration dampening laminate comprises a constraining layer, a viscoelastic adhesive layer, a foam spacing layer and a pressure sensitive adhesive layer including a release layer. The pressure sensitive adhesive layer and release layer are contoured to fit a profile of the article being soundproofed and vibration dampened.
Claims5
A vibration dampening laminate for vehicular use, comprising:
- a polyurethane foam spacing layer having a flexular modulus of 10 to 300,000 psi and a thickness of about 0.1 inches to 1.0 inches, wherein the polyurethane spacing layer has opposite first and second surfaces;
- a foil constraining layer adhesively secured to the first surface of the polyurethane foam spacing layer via a viscoelastic adhesive layer disposed therebetween, wherein the foil constraining layer comprises aluminum foil and has a thickness of between about 0.001 inches and about 0.01 inches;
- a decorative fabric layer secured to the foil constraining layer;
- a pressure sensitive adhesive layer disposed on the polyurethane foam spacing layer second surface;
- and
- a release layer disposed on the pressure sensitive adhesive layer;
- wherein the pressure sensitive adhesive layer and release layer are contoured to fit a profile of a portion of a vehicle;
- and
- wherein the laminate is sufficiently shear stiff such that the viscoelastic adhesive layer experiences substantially all shear strain when the laminate is subjected to shear forces.
6 more elements
Dependencies are inferred from the claim text.