Process and apparatus for continuous dyeing of cellulosic circular knits
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United States of America Patent
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Sep 14, 1999
Grant Date -
N/A
app pub date -
Mar 10, 1998
filing date -
Mar 11, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A dyeing process comprises continuous dyeing of cellulosic circular knit, which comprises impregnating a rope of said circular knit with an aqueous liquor comprising one or more dissolved and/or dispersed dyes, any necessary fixing alkali and optionally further assistants at a temperature between 20 and 95.degree. C., squeezing off said impregnated rope and subsequently feeding said squeezed-off rope without intermediary drying into an apparatus in which said rope is opened out into a crease-free state and said dye is fixed in an unsaturated steam/air mixture which is at 100 to 160.degree. C. at an autogenous wet temperature of the moist rope of between 50 and 95.degree. C. and a fixing time of at least 20 seconds.
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