Hongseong's lightweight door in railway vehicle is consist of honeycomb cores and an aluminum or stainless steel as a skin material. These product also can be applied for doors for shipbuilding. Honeycomb panel is consists of hexagonal shape of honeycomb core and two sheets of aluminum surfaces. Its hexagonal shape of core makes optimum mechanical properties and is able to carry shear loads at much lower weight than foams or other core types. High rigidity and excellent flatness makes designer's universal choice when they desired. The honeycomb core endows the composite panel with an exceptionally high bending strength at an extremely low weight. In terms of traditional honeycomb panels with brittle-hard bonding systems like epoxy, the HIVETECKS® bonding system is tough and high degree of elasticity. The advantages of these are improved peel strength, especially.