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Carbon fiber prepreg HexPly® M91
for aeronautics

carbon fiber prepreg
carbon fiber prepreg
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carbon fiber
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for aeronautics


HexPly® M91 is a new toughened epoxy prepreg offering superior performance for primary aircraft structures and engines. This new prepreg even outperforms Hexcel’s industry leading HexPly® M21 prepreg, widely used to manufacture aerospace structures and with which it is fully compatible. HexPIy® M91 is the very latest aerospace primary structure prepreg from Hexcel. With excellent toughness including very high residual compression after impact (CAI), HexPIy® M91 can meet the ever growing needs of aerospace OEMs to manufacture lighter, faster and more efficient aircraft. In addition to excellent toughness, HexPIy® M91 - in combination with HexTow® fiber - demonstrates improved tensile performance, both for intermediate modulus and high strength carbon fiber. Outstanding performance is achieved when combined with HexTow® IM10 fiber. Good hot hot-wet properties up to 120°C (250°F) are obtained. HexPly® M91 prepreg has been specifically designed for automated processing and is particularly suited for both automated tape laying (ATL) and advanced fiber placement (AFP). Good tack life and out-life provide flexibility on the shop floor and low exotherm behaviour allows simple cures of thick monolithic structures up to 70mm (2.76”).


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