Manufacturing process of a para-aramid filament yarn, dyed in mass, and a wick, wick, staple fiber yarn and textile fabric

摘要

Process for manufacturing a dyed para-aramid filament yarn, in which the process comprises the steps of a) preparing a spinning paste comprising a para-aramid polymer, at least one dye and concentrated sulfuric acid , b) spin the spinning paste through a row to obtain spun filaments, c) coagulate the spun filaments to obtain coagulated filaments, d) neutralize the coagulated filaments to obtain neutralized filaments, e) wash the neutralized filaments to obtain washed filaments , and f) drying the washed filaments to obtain dry filaments, characterized in that in step a) the spinning paste is prepared with between 17.5 and 18.5% by weight of a para-aramid polymer with respect to the weight of the spinning paste and between 4 and 15% by weight of at least one dye with respect to the weight of the para-aramid polymer plus the at least one dye, and in step f), during drying, the fi Laments are kept under a tension in the range of 0.2 to 0.8 cN / dtex