1results about How to "Less fuzz" patented technology

This invention provides a high-performance polyacrylonitrile fiber and its preparation method. The high-performance polyacrylonitrile fiber includes a steam drawing step. In the steam drawing step, the tension of the fiber bundle after steam drawing and the steam drawing pressure satisfy the following relationship: -10x + 4651 ≤ y ≤ -16x + 6976; where x is the steam drawing pressure, x is 150–380 kPa; and y is the tension of the fiber bundle, in cN. The preparation method includes: wet spinning extrusion of polyacrylonitrile dope, coagulation molding, hot water drawing, washing, oiling, drying and densification, steam drawing, steam heat setting, and winding to obtain the high-performance polyacrylonitrile fiber. This invention solves the problems of high fiber strength CV value after steam drawing and high fuzziness during heat setting in the prior art.