DYEING METHOD OF ARAMID FILAMENT YARN HAVING EXCELLENT DYEING PERFORMANCE WITH PHYSICAL PRETREATMENT ONLY

摘要

A dyeing method of aramid filament yarn according to the present invention comprises the following steps: a twisting step for twisting aramid filament yarn with a first twist number in a first direction to have a twist factor of 175-200; a heat-setting step for heating the twisted aramid filament yarn in the first direction at a temperature of 100-150°C for 30 minutes to one hour; a reverse twisting step for twisting the heat-set aramid filament yarn with a second twist number, which is larger than the first twist number, in a second direction opposite to the first direction to have a twist factor of the second direction to be 15-30; and a dyeing step for soaking and dyeing the twisted aramid filament yarn in the second direction at a temperature of 100-150°C for 30 minutes to one hour in a dyeing solution.;COPYRIGHT KIPO 2018