Carbon-reinforced PEKK is a stiffer version of PEKK with modestly higher strength, though it is less ductile and weaker across the layers.
Carbon-reinforced PEKK is PEKK (polyetherketoneketone) filled with chopped carbon fibers, which make it stiffer than unfilled PEKK and modestly stronger, but also far less ductile. As with other carbon-filled high-performance polymers, parts are weaker across the layers than within them.
Carbon-reinforced PEKK is a good option for rigid, heat-exposed functional parts and tooling.