PURPOSE: To obtain a dyed material without dyeing speck by applying specific two components at a specified weight ratio to a dye bath in dyeing polyamide- based synthetic fiber.
CONSTITUTION: (A) An ethylene oxide adduct of a fatty acid ester expressed by formulas I to III [R1 to R9 are 6-18C fatty acid residue; EO is ethylene oxide; (a) is 4-8; (x), (y) and (z) are [(x)+(y)+(z)]=12-24; (s), (t), (u) and (v) are [(s)+(t)+(u)+(v)]=16-32] and (B) and ethylene oxide adduct of an arylphenolsulfonic acid salt expressed by formulas IV and V [X, Y and Z are arylphenolic residue, etc., having 2-6 benzene rings; (l), (m) and (n) are within the range of 200-350wt.% based on the weight of the residues expressed by X, Y and Z; M is Na, K, NH4, etc.] at 2: (0.5-1.0) weight of the components (A):(B) are added to a dye bath. Thereby, a uniformly dyed material without unevenness is readily obtained.
AKAZAWA MICHIO
HARA MASARU
