Dupont Nomex Paper Over-expanded Aramid Honeycomb
Aramid honeycomb is the standard for lightweight non-metallic composite construction. Commercial Grade honeycomb made with aramid fiber paper (aramid or equivalent) coated with heat resistant phenolic resin offers excellent resiliency, low density, lower pricing and high strength to weight ratio.
Ultra lightweight, aramid honeycomb used in sandwich constructions. Unlike metals, Nomex provides galvanic corrosion resistance (also against corrosion of metal inserts) and allows the use of carbon skins. Other definite advantages are low thermal expansion and conductivity and high heat and fire resistance. Its superior mechanical properties and high dimensional stability under heat and moisture make it suitable for a large variety of high end applications.
Key Feature:
• High strength to weight ratio
• Corrosion resistant
• Excellent dielectric properties
• Thermally insulating
• High toughness
• Excellent creep and fatigue performance
• Good thermal stability
• Over collapsed cell configuration suitable for forming simple curves
• Compatible with most adhesives used in sandwich composites
Application:
Aircraft, Spacecraft, High speed vessel, Train, Radar etc. navy bulkhead joiner panels, helicopter rotor blades, fuel tanks, antennas, radar, flooring, boat hulls, auto racing bodies, train car panels, ship panels, ground transportation structures, ground antennas and special purpose panels.
Carbon Fiber Sandwich Panel-PMI Foam
Key Advantages of Carbon Fiber Sandwich Structures:
A carbon fiber sandwich structure consists of two thin, strong carbon fiber composite face sheets bonded to a lightweight core material. Its advantages stem from this ingenious design:
Exceptional Specific Stiffness (Stiffness-to-Weight Ratio)
Principle: Based on the moment of inertia in structural mechanics. Stiffness is proportional to the cube of the thickness. The sandwich design separates the strong face sheets, dramatically increasing overall thickness and thus bending stiffness with minimal weight. This is analogous to an I-beam, where material is concentrated at the top and bottom surfaces where stress is highest, making it far more efficient than a solid block.
Benefit: Critical for applications where low weight and minimal deformation are required (e.g., aerospace, high-performance sports, medical devices).
High Specific Strength (Strength-to-Weight Ratio)
Under bending and compressive loads, the sandwich structure exhibits far greater strength than a solid slab of the same weight. The top face sheet resists compression, the bottom resists tension, and the core maintains the distance between them and handles shear forces.
Superior Lightweight Properties
The core material is mostly air (e.g., foam, honeycomb), resulting in very low density. This allows the structure to achieve the same stiffness or strength as a solid metal or composite plate at a fraction of the weight.
Excellent Damping, Thermal, and Acoustic Insulation
The core layer effectively dampens vibrations and absorbs impact energy. Closed-cell foam cores also provide good thermal and acoustic insulation.
Great Design Freedom
The mechanical, thermal, and acoustic properties can be precisely tailored by selecting different face sheet thicknesses, core materials, and core thicknesses to meet specific requirements.
