Its paper, (Aramid honeycomb paper) not cardboard....Its the same composite used in aircraft honeycombs also...helicopter bladesI wish, she's cardboard unfortunately, this is from Webasto's sell sheet on the product.
Features:
High density, excellent corrosion and fire resistance (aramid paper having high strength and excellent heat resistance is molded into a honeycomb shape and impregnated with resin).
This product has acquired certification from domestic and international aircraft manufacturers as a material for manufacturing complex, high-performance structural elements by being bonded to a variety of surface materials, including composite materials such as prepregs.
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