Evonik's ROHACELL Foam Successfully Used in the First China's C919 Composite Aircraft

Dec. 16, 2010 - PRLog -- Evonik’s ROHACELL polymethacrylimide (PMI) rigid foam core material has been used in the manufacture of the composite rear pressure bulkhead prototype of China's first large commercial airliner, the C919. It is the first time in China that a commercial aircraft applies composite material to its primary load-carrying structure.

The rear pressure bulkhead prototype is the first large-sized composite part completed in C919, of which structure ROHACELL is used as the stringers to enhance the stiffness and buckling properties of the part. The production of this prototype was finished within 5 months after the design CAD files were released, and the fast delivery of a high-quality ready-to-use ROHACELL shape from Evonik ensured its realization. The successful roll-out of the rear pressure bulkhead prototype in mid October has further validated the engineering design and manufacturing process; it also guarantees the smooth development process of other composite parts on the aircraft.

Evonik played the role of a strategic partner during the design and development of the rear pressure bulkhead prototype for C919. ROHACELL material solution helps not only to realize the complicated spherical structure but also ensure its functions. Because of its outstanding material properties—primarily its excellent creep and shear properties, even under prolonged dynamic stress—ROHACELL has proven to be an excellent structural foam in fiber composite components for the aviation industry. The reduced weight saves fuel and also reduces CO2 emissions.

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