Patent ID: 6790520
Filing Date: 2004-09-14
Classification: A47L,B32B,B60R,G10K,Y10T

Abstract:
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.