Method of dyeing hydrophobic textile fibers with colorant materi

Bleaching and dyeing; fluid treatment and chemical modification – Confined gas phase superatmospheric pressure dyeing process

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8922, D06P 100, D06P 500

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active

060483695

ABSTRACT:
Processes for dyeing a hydrophobic textile fiber with a colorant material using a SCF--CO.sub.2 dyebath are described. One process employs cooling, without venting or removing CO.sub.2 from the system, to a target CO.sub.2 temperature at or below the glass transition temperature of the hydrophobic fiber, followed by the venting of the dyeing system to atmospheric pressure. The other process employs venting, without cooling, to a target CO.sub.2 density where dye is no longer soluble in the SCF--CO.sub.2, followed by cooling to a target temperature and then venting to atmospheric pressure. Optionally, the temperature of the dyeing process is established by heating the process according to a selected temperature profile.

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