Fire Resistant Composite Panel
A composite panel, which includes a heat spreading layer and a carbon foam core having desirable fire retardant properties, and resistance to environmental stress. The composite panel can also include a first layer and a second layer bound to a first surface and second surface of the carbon foam core. Applications of the panel include structural and fire retardant elements of residential and commercial buildings, aircraft and watercraft.
1 . A fire resistant composite panel comprising:
a first layer of a carbon foam material; and
a heat spreader layer bound to the carbon foam material.
2 . The panel of claim 1 , wherein the heat spreader layer comprises compressed particles of exfoliated graphite.
3 . The panel of claim 1 , further comprising:
a second layer of carbon foam material positioned such that the heat spreader layer is sandwiched between the first and second layers of carbon foam material.
4 . The panel of claim 3 , wherein each of the first and second layers of carbon foam material has a thickness of at least about 0.25 inch.
5 . The panel of claim 4 , wherein the thicknesses of the first and second layers of carbon foam material are substantially equal.
6 . The panel of claim 3 , wherein each of the first and second layers of carbon foam material has a thickness in a range of up to about 2.0 inches.
7 . The panel of claim 2 , wherein when the carbon foam material has a thickness of less than about 4.0 inches, the panel exhibits a fire rating of at least two hours.
8 . The panel of claim 1 , wherein the carbon foam material has a density of from about 0.03 g/cc to about 0.6 g/cc.
9 . The panel of claim 1 , wherein the carbon foam material has a density of from about 0.04 g/cc to about 0.16 g/cc.
10 . The panel of claim 1 wherein the carbon foam material has a thermal conductivity measured at room temperature (add to spec as well Done: DWK) of less than about 1 W/m-K.
11 . The panel of claim 1 , further comprising first and second outer layers having the first layer of carbon foam material and the heat spreader layer sandwiched therebetween.
12 . The panel of claim 11 , wherein the outer layers are each selected from the group consisting of paper, reinforced paper composites, oriented strand board, fiberboard, drywall, gypsum, gypsum composites, wood, wood composites, plywood, thermoplastics, plastic composites, resins, metals, metal alloys, metal composites, and combinations thereof.
13 . A composite panel comprising:
first and second outer layers;
first and second layers of carbon foam material sandwiched between the first and second outer layers; and
a heat spreader layer of compressed particles of exfoliated graphite sandwiched between the first and second layers of carbon foam material.
14 . The panel of claim 13 , wherein each of the first and second layers of carbon foam material has a thickness of at least about 0.25 inch to about 3.0 inches.
15 . The panel of claim 14 , wherein when the first and second layers of carbon foam material have a combined thickness of at least about 4.0 inches, the panel exhibits a fire rating of at least two hours.
16 . The panel of claim 13 , wherein the carbon foam material includes first and second layers of coating disposed between the first and second carbon foam layers and the first and second outer layers, respectively.
17 . The panel of claim 16 , wherein the first and second layers of coating improve fire retardancy of the carbon foam material.
18 . The panel of claim 13 , wherein the carbon foam material has a thermal conductivity measured at room temperature of less than about 1.0 W/m-K.