Patent ID: 8328971
Filing Date: 2012-12-11
Classification: B32B,Y10T

Abstract:
1. A method of making a laminated sheet product comprising a first metallic sheet and a second metallic sheet, each sheet having an interior surface and an exterior surface wherein the interior surface of each sheet is adhered to and separated by a viscoelastic polymeric sheet comprising pores in predetermined volume fraction, the method comprising: preparing the interior surfaces of each of the metallic sheets for adhesion to the viscoelastic polymeric sheet; incorporating in a viscoelastic polymer a predetermined concentration of microspheres, the microspheres comprising a substantially-continuous polymer wall, which encloses a gas-filled interior volume, and an electrically conductive coating applied to the polymer wall, the polymer wall having an elastic modulus that differs from an elastic modulus of the viscoelastic polymer by less than 50 percent, and the microspheres being present in the viscoelastic polymer at a volume fraction that ranges from about 10 to 50 percent; forming the microsphere-containing viscoelastic polymer into a thin viscoelastic polymeric sheet having a pre-determined thickness and first and second surfaces; and assembling the laminate by adhering the interior surface of the first metallic sheet to the first surface of the viscoelastic polymeric sheet and adhering the second metallic sheet to the second surface of the viscoelastic polymeric sheet.