Method of dyeing polycapronamide textile articles using two acid dye combinations with different dyeing kinetics
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United States of America Patent
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May 26, 1987
Issued Date -
N/A
app pub date -
Apr 17, 1985
filing date -
Jun 15, 1982
priority date (Note) -
Expired
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Abstract
A method of dyeing textile materials of polycapronamide, enabling low temperature dyeing conditions and process duration times which do not exceed the art standards, is characterized by the following combined features: (a) use of at least two discrete combinations of dyestuffs, which show different kinetic behaviors from each other; (b) maintenance of an alkaline pH at tapering values, in the extreme down to neutral; (c) use of exclusively anionic dyeing aids; and (d) maintenance through the various method steps of a maximum temperature as high as 60.degree. C., preferably as 40.degree. C. Perfectly uniform dyeing is achieved through the utilization of conventional apparata and dyeing method procedures.
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