METHOD FOR PREPARING CARBON FIBER PRECURSOR

摘要

PURPOSE: A manufacturing method of a carbon fiber precursor is provided to manufacture the carbon fiber with high intensity and high elasticity by reducing deformity of the carbon fiber by a void, and to reduce the void existing in dope liquid. CONSTITUTION: A manufacturing method of a carbon fiber precursor includes the following steps: manufacturing dope liquid by dissolving an acrylonitrile copolymer in an organic solvent by putting the acrylonitrile copolymer(12) and an organic solvent(14); transferring the dope liquid in a dope liquid storage tank(30); and manufacturing the carbon fiber precursor by spinning the transferred dope liquid. The intensity of the ultrasonic wave is 10-300kHz.