Patent ID: 9688050
Date: 2017-06-27
CPC Classifications: B29C,B29K,B29L,B32B,E04C,Y10T

Claim:
1. An interior panel structure of a transportation vehicle, comprising: a first panel formed at least partially of a woven prepreg thermoset material that cures when exposed to temperatures above 230° F.; a second panel formed at least partially of a porous material that allows sound waves to pass through the second panel, the second panel being an outer panel that is closer to a body of the transportation vehicle than the first panel while the first panel is closer to an interior cabin of the transportation vehicle; and a heat-activated foamable elastomeric material intermediate the first panel and the second panel, the elastomeric material foaming at temperatures above 230° F. and whereby after expansion the elastomeric material is a foam material that wets and bonds to one or more adjacent surfaces; wherein space is formed between the foam material and the first panel; and wherein the panel structure, when assembled and in use, provides sound absorption, damping, or attenuation by virtue of the sound waves passing through pores of the porous material of the second panel and into the foam material and the space between the foam material and the first panel.