Abstract:

Different cationic surfactants with special structure were used as additives in order to improve the level-dyeing property of the acrylic fiber. The level-dyeing property of N，N-bis(dimethyl tetradecyl)-3-oxa-1,5-penta diammonium bromide was used as dyeing additive for cationic dyestuff on the acrylic fiber. The results show that the level-dyeing property of bis-quaternary ammonium salt was better than that of tradional cationic surfactant 1227 or 1631 on acrylic fiber. Moreover, the level-dyeing property of bis-quaternary ammonium salt was the optimum when the concentration was from 1.5×10-5 to 2×10-5 mol/L. The influence of these levelling agents on K/S value was as follows: bis-quaternary ammonium salt > levelling agent 1631 > levelling agent 1227, and so with the order in terms of level-dyeing property for acrylic fiber.