Carbon fiber yarn/ carbon roving/ carbon product 1.Introducing Carbon fiber yarn is new reinforcement fiber, including both carbon feature and fiber limpness or machinability. It is crystallite graphite material after gf organic fiber carbonizing and graphite dealing, such as polyacrylonitrile carbon fiber and asphalt carbon fiber. 2.Producing progress Fiber spinning Preliminary heat treatment in oxidizing Carbonizing Graphite dealing Chemical changing: dehydrogenation, cyclizing, preliminary heat treatment in oxidizing 3. Feature 3 times young modulus more than fiberglass High corrosion resistance High strength material Specific gravity is less 1/4 of steel Tensile strength is more than 3500 mpa Modulus elasticity is 230-430 gpa Good heat conduction and electrical conductivity Little coefficient of thermal expansion Lower density Good x radial permeability 3k, 12k, 24k.48k.