BURNTHROUGH PROTECTION SYSTEM
A burnthrough protection system including a fire barrier layer, a foam insulation material, and a distinct buffer layer disposed between the fire barrier layer and the foam insulation material, wherein the buffer layer is adapted to prevent adhesion between the fire barrier layer and the foam insulation at elevated temperature. The burnthrough protection system may be capable of passing the flame propagation and burnthrough resistance test protocols of 14 C.F.R. §25.856(a) and (b), Appendix F, Parts VI and VII. Also, an aircraft including an exterior skin, an interior liner, and the burnthrough protection system disposed between the exterior skin and the interior liner.
1 . A burnthrough protection system comprising a fire barrier layer, a foam insulation material, and a distinct buffer layer disposed between the fire barrier layer and the foam insulation material, wherein the buffer layer comprises a binder and at least one of boron nitride, vermiculite, mica, graphite, or talc, wherein the buffer layer at least partially prevents adhesion between the fire barrier layer and the foam insulation material at elevated temperature associated with exposure to flame to prevent tears or other defects in the fire barrier layer, and wherein the fire barrier layer forms at least a portion of a covering which at least partially encapsulates the foam insulation material and the distinct buffer layer.
2 . The burnthrough protection system of claim 1 , wherein the buffer layer comprises expandable graphite and a binder.
3 . The burnthrough protection system of claim 1 , wherein the binder comprises an organic binder.
4 . The burnthrough protection system of claim 2 , wherein the buffer layer is capable of expanding when the buffer layer experiences a temperature of from about 200° F. to about 1,950° F.
5 . The burnthrough protection system of claim 1 , wherein the buffer layer comprises boron nitride and an organic binder.
6 . The burnthrough protection system of claim 1 , wherein the buffer layer further comprises at least one functional filler.
7 . The burnthrough protection system of claim 1 , wherein the buffer layer is engaged with the foam insulation material.
8 . The burnthrough protection system of claim 7 , wherein the buffer layer is coated onto the foam insulation material.
9 . The burnthrough protection system of claim 1 , wherein the buffer layer has a basis weight of from about 2 gsm to about 50 gsm.
10 . The burnthrough protection system of claim 8 , wherein the buffer layer comprises a platelet material, wherein the platelet material is present on the foam insulation material in an amount of from about 0.2 gsm to about 50 gsm.
11 . The burnthrough protection system of claim 1 , wherein the distinct buffer layer is a separate interleaf layer between the fire barrier layer and the foam insulation material.
12 . The burnthrough protection system of claim 1 , wherein the buffer layer comprises from about 5 weight percent to about 95 weight percent of a platelet material.
13 . The burnthrough protection system of claim 12 , wherein the buffer layer comprises from about 40 weight percent to about 60 weight percent of the platelet material.
14 . The burnthrough protection system of claim 1 , wherein the foam insulation comprises at least one of polyimide foam, melamine foam or silicone foam.
15 . The burnthrough protection system of claim 1 , wherein the fire barrier layer comprises at least one fire-blocking layer comprising a paper or coating comprising a fibrous or non-fibrous material, optionally wherein the non-fibrous material comprises a mineral material.
16 . The burnthrough protection system of claim 15 , wherein the mineral material comprises at least one of mica or vermiculite.
17 . The burnthrough protection system of claim 16 , wherein the mica or vermiculite is exfoliated and defoliated.
18 . An aircraft comprising an exterior skin, an interior liner, and the burnthrough protection system of claim 1 disposed between the exterior skin and the interior liner.
19 . The burnthrough protection system of claim 1 , wherein the buffer layer comprises talc and an organic binder.
20 . The burnthrough protection system of claim 1 , wherein the buffer layer comprises mica and an organic binder.
21 . A burnthrough protection system comprising a fire barrier layer, a foam insulation material, and a distinct buffer layer disposed between the fire barrier layer and the foam insulation material, wherein the buffer layer comprises a binder and at least one of boron nitride, vermiculite, mica, graphite, or talc, wherein the buffer layer at least partially prevents adhesion between the fire barrier layer and the foam insulation material at elevated temperature associated with exposure to flame to prevent tears or other defects in the fire barrier layer, wherein the burnthrough protection system is capable of passing the flame propagation and burnthrough resistance test protocols of 14 C.F.R. §25.856(a) and (b), Appendix F, Parts VI and VII, and wherein the fire barrier layer forms at least a portion of a covering which at least partially encapsulates the foam insulation material and the distinct buffer layer.
22 . A burnthrough protection system comprising a fire barrier layer comprising vermiculite platelets, a foam insulation material, and a distinct buffer layer disposed between the fire barrier layer and the foam insulation material, wherein the buffer layer comprises expanding graphite, and a binder, wherein the buffer layer at least partially prevents adhesion between the fire barrier layer and the foam insulation material at elevated temperatures associated with exposure to flame to prevent tears or other defects in the fire barrier layer, and wherein the fire barrier layer forms at least a portion of a covering which at least partially encapsulates the foam insulation material and the distinct buffer layer.
23 . The burnthrough protection system of claim 22 , wherein the buffer layer is capable of expanding when the buffer layer experiences a temperature of from about 200° F. to about 1,950° F.
24 . The burnthrough protection system of claim 22 , wherein the buffer layer further comprises at least one functional filler.
25 . The burnthrough protection system of claim 22 , wherein the buffer layer is engaged with the foam insulation material.
26 . The burnthrough protection system of claim 25 , wherein the buffer layer is coated onto the foam insulation material.
27 . The burnthrough protection system of claim 26 , wherein the buffer layer is present on the foam insulation material in an amount of from about 2 gsm to about 50 gsm.
28 . The burnthrough protection system of claim 27 , wherein the buffer layer comprises a platelet material, wherein the platelet material is present on the foam insulation material in an amount of from about 0.2 gsm to about 50 gsm.
29 . The burnthrough protection system of claim 22 , wherein the distinct buffer layer is a separate interleaf layer disposed between the fire barrier layer and the foam insulation material.
30 . The burnthrough protection system of claim 22 , wherein the buffer layer comprises from about 5 weight percent to about 95 weight percent of a platelet material.
31 . The burnthrough protection system of claim 30 , wherein the buffer layer comprises from about 40 weight percent to about 60 weight percent of the platelet material.
32 . The burnthrough protection system of claim 22 , wherein the foam insulation comprises at least one of polyimide foam, melamine foam or silicone foam.
33 . The burnthrough protection system of claim 22 , wherein the vermiculite is exfoliated and defoliated.
34 . An aircraft comprising an exterior skin, an interior liner, and the burnthrough protection system of claim 22 disposed between the exterior skin and the interior liner.
35 . A burnthrough protection system comprising a fire barrier layer comprising vermiculite platelets, a foam insulation material, and a distinct buffer layer disposed between the fire barrier layer and the foam insulation material, wherein the buffer layer comprises expanding graphite, and a binder, wherein the buffer layer at least partially prevents adhesion between the fire barrier layer and the foam insulation material at elevated temperatures associated with exposure to flame to prevent tears or other defects in the fire barrier layer, wherein the burnthrough protection system is capable of passing the flame propagation and burnthrough resistance test protocols of 14 C.F.R. §25.856(a) and (b), Appendix F, Parts VI and VII, and wherein the fire barrier layer forms at least a portion of a covering which at least partially encapsulates the foam insulation material and the distinct buffer layer.