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Airtech

Hexcel at Farnborough International 2004

16 July 2004

At this year's Farnborough Airshow, Hexcel will promote its new developments for the Aerospace industry, including products developed for the Airbus A380 and Boeing 7E7.

One of the products being demonstrated is HexPly M21. The product description states that this is a tough, third generation epoxy matrix, with greater damage tolerance than second-generation aerospace systems. The toughness, particularly after high-energy impacts, has been achieved without compromising the mechanical properties of the matrix.

In addition to being qualified for use on A380, HexPly M21 fully meets the requirements of BMS8-276 specification. A380 parts made from HexPly M21 prepreg will be on display on the Hexcel stand, including a stringer manufactured in Japan by JAMCO and A380 VTP hinge bracket manufactured by Airbus, Germany.

HexPly M50 is Hexcel's newly launched self-adhesive prepreg system for aircraft sandwich panels. This self-adhesive prepreg bonds directly to the honeycomb, thereby eliminating the need for additional adhesive layers, with potential weight-savings of up to 10 percent.

Hexcel’s latest honeycomb innovation for the aerospace industry is HexWeb HRH-36 Flexcore. This new honeycomb combines Hexcel’s flexible cell geometry with the latest high performance core material. Constructed from Kevlar paper and reinforced with a high temperature resistant phenolic resin, HexWeb HRH-36 Flexcore provides strength retention at up to 175°C/350°F and retains its mechanical properties in a curved condition.

HexWeb HRH-36 Flexcore is also claimed to provide higher shear strengths than comparable hexagonal cores of equivalent density and can therefore give valuable weight savings for an equivalent performance. The honeycomb's formability into compound curvatures is unsurpassed.

Hexcel will display at Farnborough an aircraft window frame demonstrator part moulded in HexMC, which is Hexcel's new high performance carbon fibre/epoxy moulding compound, designed for the press moulding of composite parts.

The high carbon fibre volume content combined with aerospace qualified epoxy resins opens up opportunities for more aerospace parts to be made from composites, replacing metals. HexMC is suitable for large volume production of complex 3D high performance parts, allowing for thickness variations, sharp angles, ribs, stiffeners and co-moulded inserts. Processing HexMC is quick and efficient, using an automated SMC type production. There is no costly and time-consuming lay-up or scrap, and as the part is moulded into perfect shape, no finishing processes are required.





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