Aramid honeycomb paper is a biomimetic composite material made by scientists imitating the natural honeycomb of bees. The sandwich structure made of it has many excellent characteristics such as light weight, high specific strength and stiffness, outstanding corrosion resistance and flame retardancy, excellent environmental resistance and insulation, unique resilience and shock absorption, good electromagnetic wave transmission and high temperature stability.

The interior of the ceiling and floor of the Transrapid maglev train in Germany adopts a Nomex honeycomb sandwich structure, ensuring the weight requirements of the maglev train for the vehicle body; Internal structural components such as side walls, ceilings, and luggage racks of the Bay Area Rapid Transit (BART) in the United States.

The roof of the Italian ETR-500 train adopts a sandwich panel made of aramid paper honeycomb core material and glass fiber reinforced phenolic resin prepreg, which reduces the weight of the roof by 52.6% and ensures the requirements of bending stiffness, flame retardancy, and aging resistance of the train roof.