Method of forming noise-damping material with ultra-thin viscoelastic layer
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United States of America Patent
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Mar 20, 2001
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N/A
app pub date -
May 26, 1998
filing date -
May 26, 1998
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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.
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