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It is Nylon 6 Filled Long Crbon Fiber,long carbon fiber reinforced polyamide 6 (LCF/PA6) composites were prepared by injection-molding a novel kind of core/shell pellets that were mass produced by a convenient and scalable process of melt impregnation assisted by a single screw extruder.
link:http://www.lfrt-plastic.com/long-carbon-fiber-polyamide-6/nylon-6-filled-long-crbon-fiber.html
Nylon 6 Filled Long Crbon Fiber