PREPARATION METHOD FOR CARBON FIBER WITH HIGH PERFORMANCE USING TEXTILE GRADE POLYACRYLONITRILE FIBER

摘要

The present invention relates to a production method of a high performance carbon fiber using a polyacrylonitrile fiber for fabrics comprising the following steps: an elongation step of elongating the polyacrylonitrile (PAN) fiber for fabrics using more than one process selected from hot water elongation and heat elongation to obtain an elongated polyacrylonitrile (PAN) fiber; oxidizing and stabilizing the elongated polyacrylonitrile (PAN) fiber; and carbonizing the oxidized and stabilized elongated polyacrylonitrile (PAN) fiber. According to the present invention, Using the polyacrylonitrile fiber (PAN) for fabrics, which is not suitable for a precursor of the carbon fiber through hot water elongation and/or heat elongation, the high performance carbon fiber having the proper fiber diameter, high degree of polymer chain orientation, and mechanical strength is obtained. The price of the carbon fiber is capable of decreased by using the polyacrylonitrile fiber (PAN) for fabrics.