In order to improve production efficiency

simplify procedure

and produce polyacrylonitrile (PAN) spinning dope

which is stable and has high viscosity-average molecular weight (Mη)

a new PAN dissolution method with twin-screw extruder was developed. A mode of T-combination was used to frame the second order twin-screw and a filter was installed in the outlet port. A mixed solvent suitable for screw extruder based on PAN dissolution theory and dissolution ability of solvents was selected. The dissolved PAN was used in dry jet wet spinning and high strength fiber with low linear density was made. The twin screw method of dissolving PAN satisfied high performance fiber production requirement

and the solution quality was stable and more productive.