| Description: HexWeb® HFT® is a fiberglass ± 45 degree Fibertruss® bias weave reinforced/phenolic honeycomb. This bias weave construction enhances the shear modulus properties of the honeycomb core. The shear modulus for HexWeb® Fibertruss® HFT® is about twice that of HRP® (honeycomb made of straight weave fiberglass) and three times that of HRH®-10 (honeycomb made from NOMEX®). This makes HexWeb® Fibertruss® HFT® honeycomb ideal for applications where minimum deflections are required. There is little change in flatwise compression properties due to the bias of the glass. HexWeb® Fibertruss® HFT® has improved damage resistance and handling since the 45 degree angle of the fiber at the cell wall corners allows greater flexibility. This increased flexibility allows the HexWeb® Fibertruss® HFT® to be formed more easily than straight weave honeycombs, resulting in reduced shop losses and simplified fit up of parts during assembly. HexWeb® Fibertruss® HFT® has improved node bond strength and flexibility that makes it possible to offer a 1/8-inch cell fiberglass reinforced honeycomb. This, together with the higher shear properties, makes HexWeb® Fibertruss® HFT® an excellent core for use with high modulus graphite or other composite facing materials. The potential problem of galvanic corrosion with untreated aluminum honeycomb is eliminated, and the small cell size provides uniform support and bonding area for such facings. Key Features: - High shear properties, due to the ±45 degree fiber orientation
- Small cell size, 1/8 inch minimum hexagonal
- Improved flexibility; damage resistance, and handling characteristics over conventional 0/90 degree fiber construction
- High strength retention at temperatures up to 350°F
- Low moisture pickup
- Low smoke emission
Applications: HexWeb® Fibertruss® HFT® is ideally suited for use in structural panels where superior nonmetallic core shear properties and/or minimum deflections are required. Typical applications are airfoil, control surfaces, fairings, engine nacelles, bulkheads, helicopter rotor blades, and equipment trays for motion-sensitive block boxes. HexWeb® Fibertruss® HFT® has also been designed into radomes because of its small cell size, dielectric transparency, and ease of handling.Information provided by Hexcel Corporation. |
