Dope dyed meta-aramid flat fiber

摘要

The present invention relates to a meta-aramid flat fiber formed by using meta-aramid polymerized with m-phenylenediamine (MPD) and isophthaloyl chloride (IPC) and, specifically, relates to a dope dyed meta-aramid flat fiber, wherein pigment is contained in 1 to 15 wt% of the fiber weight, and the flat fiber is formed as a spinneret satisfying following formula (1): L2s. L: major axis length of fiber cross-section, S: minor axis length of fiber cross-section