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Ensinger PEI
3A Composites Core Materials AIREX® C71.75 Elevated Temperature Structural Foam
Categories: Other Engineering Material; Composite Core Material; Polymer

Material Notes: AIREX® C71 is a closed cell, crosslinked polymer foam especially formulated to maintain its stability also at higher processing or service temperatures. It combines excellent stiffness and strength to weight ratios with superior toughness. It is non-friable, contains no CFC’s, has negligible water absorption, and provides an excellent resistance to chemicals. A fine cell structure offers an excellent bonding surface. Compatible with most resins and manufacturing processes AIREX® C71 is ideally suited as a core material for a wide variety of lightweight sandwich structures subjected to both static and dynamic loads, and exposed to elevated temperatures during manufacturing.


  • outstanding strength and stiffness to weight ratios
  • High temperature resistance
  • Good impact strength
  • High fatigue resistance
  • Low resin absorption (fine cell structure)
  • Good fire performance (self-extinguishing)
  • Sound and thermal insulation
  • Good styrene resistance
  • Dimensionally stable and non biodegradable
  • Wind Energy: Rotor blades, nacelles, turbine generator housings
  • Road and Rail: Roof panels, interiors, floors, doors, partition walls, side skirts, front-ends
  • Marine: Hulls, decks, bulkheads, superstructures, engine hatches
  • Aircraft: Interiors, radomes, galley carts, general aviation (sport aircraft)
  • Recreation: Skis, snowboards, surfboards, wakeboards, canoes, kayaks
  • Industrial: Tooling, tanks, ductwork, containers, covers
  • Vendors:
    Available Properties
    • Density, ISO 845, average
    • Density, ISO 845, typical range
    • Tensile Strength, ISO 527 1-2, in the plane
    • Tensile Strength, ISO 527 1-2, average; in the plane
    • Elongation at Break, ISO 1922, shear
    • Elongation at Break, ISO 1922, average; shear
    • Tensile Modulus, ISO 527 1-2, in the plane
    • Tensile Modulus, ISO 527 1-2, average; in the plane
    • Compressive Strength, ISO 844, perpendicular to plane
    • Compressive Strength, ISO 844, average; perpendicular to plane
    • Compressive Modulus, DIN 53421, perpendicular to plane
    • Compressive Modulus, DIN 53421, average; perpendicular to plane
    • Shear Modulus, ASTM C393
    • Shear Modulus, ASTM C393, average
    • Shear Strength, ISO 1922
    • Shear Strength, ISO 1922, average
    • Thermal Conductivity, ISO 8301
    Property Data

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