High-quality polyarylene-thioether fibers and method for production thereof.

摘要

High-property polyarylene-thioether fibers are provided, which simultaneously satisfy the following conditions: … …  (a) the polyarylene-thioether is a linear polyarylene-thioether having a melt viscosity of 5,300 to 20,000 poise (at 310 DEG C and a shear velocity of 200 second-<1>; …  (b) the fiber diameter is in the range of 1 to 50 microns; …  (c) the tensile strength is not less than 40 kg/sq.mm; …  (d) the tensile modulus of elasticity is not less than 500 kg/sq.mm; and …  (e) the tensile strength at 200 DEG C is not less than 20 kg/sq.mm. … …The fibers are produced by continuously melt-spinning a linear polyarylene-thioether polymer having a melt viscosity of 5,300 to 20,000 poise (at 310 DEG C and a shear velocity of 200 second-<1>), continuously stretching the spun filament, and continuously heat-setting the stretched filament for 0.02 to 100 seconds at a temperature of not lower than the melting point of the polymer minus 100 DEG C.