Patent ID: 7196125

Claim:
A process for making a dyed poly (trimethylene terepthalate) comprising: a. providing a poly(trimethylene terephthalate) fiber, b. combining at room temperature in an aqueous medium about 0.50 weight percent of an alcohol ethoxylate surfactant, about 0.25 weight percent of a sequestering agent, 3.00 weight percent of a benzotriazine derivative UV absorber, 0.5 weight percent of a disperse dye, and sufficient water to provide a water:fiber ratio from about 2:1 to about 40:1, all weight percents on weight of fiber, to form a dyebath; c. adjusting the pH of the dyebath to about 4.0 to about 5.0; d. combining the fiber and dyebath at room temperature; e. heating the dyebath at a rate of at least about 1° C. per minute to a temperature of 132–145° C.; f. maintaining the dyebath temperature for at least about 30 minutes to produce a dyed poly(trimethylene terephthalate) fiber; g. allowing the dye bath to cool; and h. rinsing the dyed poly(trimethylene terephthalate) fiber.