PROCESS TO MANUFACTURE A SPUN-DYED PARA-ARAMID FILAMENT YARN AND A SLIVER, SLIVER, STAPLE FIBER YARN AND TEXTILE FABRIC

摘要

A method of making a spin-dyed para-aramid filament yarn comprising the steps of: a) preparing a spin dope comprising a para-aramid polymer, at least one dye and concentrated sulfuric acid, b) spinning the spin dope through a spinneret C) coagulating said spun filaments to obtain coagulated filaments, d) neutralizing said coagulated filaments to obtain neutralized filaments, e) cleaning said neutralized filaments And f) drying the cleaned filaments to obtain dried filaments, wherein in step a) the spin dope is in the range of 17.5 to 18.5 wt% based on the weight of the spin dope, Of para-aramid polymer, and para-aramid polymer plus said at least one dye. 15% by weight of said at least one dye, characterized in that during drying in step f) said filaments are held under tension in the range of 0.2 to 0.8 cN / dtex. In addition, a method of making a sliver, a staple fiber yarn comprising a sliver, a sliver, and a textile fabric comprising the staple fiber yarn is described.