Method of forming noise-damping material with ultra-thin viscoelastic layer
AssigneeMaterial Sciences Corporation
InventorsRichard M. Hansen, Edward J. Vydra
Life of this patent
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Abstract
A noise-damping composite is formed by providing a laminate of two metal layers separated by a much thinner viscoelastic layer which has an initial thickness of at least 1 mil., and then cold rolling the laminate to proportionally permanently reduce the thickness of each layer, until the thickness of the viscoelastic layer is less than 1 mil. and preferably less than 0.5 mil. The cold rolling may be through a set of adjustable rollers, and may be done in multiple passes with the rollers adjusted for each pass to further reduce the thickness. Alternatively, the laminate may be fed successively through a series of roller sets designed to successively reduce the thickness of the laminate.
Claims15
A method of forming a noise-damping composite comprising the steps of:
- providing a laminate including two metal layers spaced apart by and joined by a viscoelastic layer with each layer having an initial thickness, and
- subjecting the laminate to compressive forces sufficient to permanently substantially reduce the initial thickness of each layer of the laminate to a final thickness, such that the viscoelastic layer has a final thickness which is in a range of from about 0.0001 to about 0.0007 inches.
A method of forming a noise-damping composite comprising the steps of:
- providing an elongated laminate including two metal layers spaced apart by and joined by a viscoelastic layer with each layer having an initial thickness, and
- cold rolling the laminate so as to exert thereon sufficient pressure to permanently substantially reduce the initial thickness of each layer of the laminate to a final thickness, such that the viscoelastic layer has a final thickness which is in a range of from about 0.0001 to about 0.0007 inches.
A noise-damping laminate comprising:
- two metal layers and a viscoelastic layer disposed between said metal layers in contact with each for joining the metal layers,
- said viscoelastic layer having a thickness approximately 0.1 mil.
Dependencies are inferred from the claim text.