Carbon fiber prepreg HexPly® M91

for aeronautics

HexPly® M91 is a high performance, very tough epoxy matrix for use in aerospace primary structures and engines. HexPly® M91 is a toughened, controlled flow, epoxy resin system supplied with unidirectional fibers. Benefits and Features Excellent toughness with very high residual compression strength after impact. Good translation of HexTow® fiber properties, both for intermediate modulus and high strength carbon fiber. Designed for automation and particularly suited for both automated tape laying (ATL) and advanced fiber placement (AFP). Good tack life and out-life, providing flexibility on the shop floor. Low exotherm behaviour allowing simple cures of thick monolithic structures up to 70mm (2.76”) Dry Tg (DMA extrapolated onset E’) of 185°C-190°C (365°F-374°F) Good hot-wet performance up to 120°C (250°F) HexPly® M91 is best suited to autoclave cure to obtain optimum mechanical performance from the cured composite.