Abstract
The dyeing behaviors for two types of poly (ethylene terephthalate) fibers, high-speed spun type and conventional regular type, were compared in supercritical CO2 fluid. The color strengths, K/S. increased with elevating the severity of dyeing conditions. At lower temperature and pressure, K/S values for the high-speed spun fibers became larger than the values for the regular fibers. Especially when the high-speed spun fibers were dyed in supercritical CO2 fluid at 80°C and 180 bar, K/S value went up to 14.0.
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