| US 7,393,575 B2 | ||
| Sheet molding compound damper component, and methods for making and using the same | ||
| Daniel Boss, Grayslake, Ill. (US) | ||
| Assigned to Material Sciences Corporation, Elk Grove Village, Ill. (US) | ||
| Filed on Dec. 26, 2006, as Appl. No. 11/644,975. | ||
| Application 11/644975 is a division of application No. 10/698938, filed on Nov. 03, 2003, granted, now 7,172,800. | ||
| Prior Publication US 2007/0104932 A1, May 10, 2007 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. B32B 5/00 (2006.01); B32B 7/02 (2006.01); B32B 27/20 (2006.01); B32B 27/30 (2006.01); B32B 27/36 (2006.01) | ||
| U.S. Cl. 428—68 [428/44; 428/47; 428/76; 428/323; 428/195; 428/212; 428/480; 428/482; 428/483; 428/421; 428/422; 720/698; 720/716; 188/378; 188/379; 248/638] | 25 Claims |
| 1. A damper component for absorbing and dissipating vibration and/or noise resonating from a device, the damper component
comprising:
a fragmented damper layer having opposite surfaces and edges and comprising a plurality of fragments that are noncontinuous
with each other to provide interstices between the noncontinuous fragments, the fragmented damper layer comprising a viscoelastomer;
and
a continuous constraining layer contacting the opposite surfaces and the edges of the fragmented damper layer to completely
encase the fragmented damper layer and fill the interstices between the noncontinuous fragments, the constraining layer having
a greater stiffness and higher modulus of dynamic shearing elasticity than the fragmented damper layer, the constraining layer
comprising a molded polyester sheet molding compound that is substantially immiscible with the viscoelastomer to provide discrete
interfaces between the constraining layer and the noncontinuous fragments.
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