| abstract |
The invention is a dyeing method of an aliphatic polyesternfilament comprising dyeing the aliphatic polyester filament with andisperse dye by selecting a dyeing temperature, dyeing pH, and dyeingntime in such a way that the weight average molecular weight of thenaliphatic polyester filament has a lowering ratio of 20% or less. n The invention is a method for dyeing the aliphatic polyesternfilament with good reproducibility and level dyeing property whilensubstantially maintaining the molecular weight and the essentiallynexcellent properties of the aliphatic polyester filament, and cannprovide dyed articles which have high strength, are excellent in levelndyeing property and color fastness to light, and have various hues. |