PROCESS FOR ISOLATING FINE PARTICLE FROM ALL AROMATIC POLYAMIDE POLYMER

摘要

A method for isolating fine particles from wholly aromatic polyamide polymer is provided to separate fine particles having a particle size of 200 mesh or smaller from an aramid resin easily without causing a clogging phenomenon of a pipe. A method for isolating fine particles from wholly aromatic polyamide polymer includes the steps of: mixing water with acid clumps 10-50 mm width, 10-50 mm length, and 5-10 mm thickness in a weight ratio of 2.5:1 to neutralize the slurry to pH 3.0-5.0; and mixing the slurry continuously using three decanters, wherein fine resin particles are isolated by controlling the number of revolutions(rpm) of each decanter. A ratio of fine particles contained in the dry aramid resin after the isolation is 1% or less.