| 摘要 |
High Temperature 1100.degree.C Burn-Through Resistant Composite Sandwich Panel 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.degree.C (2000.degree.F) front side flame impingement at 120 kW/m2(10.5 btu/ft2 sec) heat flux density, with a 43.degree.C (110.degree.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) |
