B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
B32B 3/12 (2006.01) E04B 1/94 (2006.01)
Patent
CA 2122961
High Temperature 1100°C Burn-Through Resistant Composite Sandwich Panel Abstract A composite sandwich panel structure having first and second honeycomb core layers and fire barrier membranes separating the honeycomb core layers as well as forming facing skins provides protection from burn-through after 15 minutes of subjection to a 1093°C (2000°F) front side flame impingement at 120 kW/m2(10.5 btu/ft2 sec) heat flux density, with a 43°C (110°F) average off-surface temperature 305 mm (12") off of the backside of the panel. The facing skins on the outside of the honeycomb core layers are preferably formed by a layer of vermiculite film together with a layer phenolic prepreg. The center septum layer separating the first and second honeycomb core layers can be an inorganic fiber membrane, with a layer of phenolic prepreg on both sides thereof, anchor a layer of vermiculite film or other suitable materials providing a fire barrier. The honeycomb core layers are preferably made of a nylon paper honeycomb having a coating that itself forms a fire barrier, such as a coating of 80-96% sodium silicate, 14% vermiculite HTS and 2-15% H2O based phenolic resin. (Fig. 1)
Fetherstonhaugh & Co.
Hexcel Corporation
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