APPARATUS FOR FLAMEPROOFING HEAT TREATMENT

摘要

PROBLEM TO BE SOLVED: To prevent a runaway reaction irregularly progressing the reaction from occurring in a flameproofing treatment of a polyacrylonitrile-based fiber. SOLUTION: This apparatus 40 for flameproofing heat treatment is equipped with hot-air leading-in parts 8a and 8b and hot-air leading-out parts 10a and 10b alternately installed along both sides of the running direction of yarns 20 in heat treating chambers 6a and 6b in the apparatus 40 for flameproofing heat treatment for producing a flameproofed fiber by carrying out heat treatment of the polyacrylonitrile-based fiber yarns 20 running in the heat treating chambers 6a and 6b.