SPUN-DYED META-TYPE WHOLLY AROMATIC POLYAMIDE FIBER AND METHOD FOR PRODUCING THE SAME, AND FLAME-RETARDANT SPUN YARN AND FLAME-RETARDANT STRETCH-BROKEN SPUN YARN COMPRISING THE FIBER

摘要

PROBLEM TO BE SOLVED: To provide a spun-dyed meta-type wholly aromatic polyamide fiber that is safe and shows high flame retardancy friendly to the environment, and can provide safer performance for a long time particularly in protective clothing and has excellent durability, and a flame-retardant spun yarn and a flame-retardant stretch-broken spun yarn comprising the fiber.;SOLUTION: An organic phosphorus compound, which is dissolved in an organic solvent by 5% or more but is insoluble in a 60% aqueous solution of the organic solvent, is added to a spinning dope containing a pigment so that a phosphorus atom content is 0.2-5.0 wt.%, and after that, spinning is performed.;SELECTED DRAWING: None;COPYRIGHT: (C)2019,JPO&INPIT