Simultaneous bulking and dyeing process
AssigneeBurlington Industries, Inc.
InventorSamir Hussamy
Life of this patent
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Abstract
A process for simultaneously bulking and dyeing linear polycarbonamide fibers which comprises treating the same with a solution of an alcohol containing a tinctorial amount of at least one dyestuff therein, and thereafter washing the treated fibers in hot water, soaping, and washing in hot and cold water and drying.
Claims21
A process for simultaneously bulking and dyeing linear polycarbonamide fibers comprising the steps of:
- (1) treating unbulked linear polycarbonamide fibers wherein at least about 90% of the repeating units in said fibers have the formula:
- ##STR4## wherein R is hydrogen or methyl by contacting said fibers with a solution containing at least one percent by weight of at least one alcohol and a tinctorial amount of a dyestuff, the treatment being conducted at ambient temperature;
- (2) washing the thus-treated fibers in hot water;
- (3) soaping the thus-treated fibers;
- (4) washing the soaped fibers in hot and cold water;
- and
- (5) drying the bulked and dyed fibers.
A process for simultaneously bulking and dyeing linear polycarbonamide fibers comprising the steps of:
- (a) contacting unbulked linear polycarbonamide fibers, wherein at least about 90% of the repeating units in said fibers have the formula:
- ##STR5## wherein R is hydrogen or methyl, with an aqueous solution containing at least one percent by weight of an alcohol, a tinctorial amount of a cationic "basic"]dye and an organic acid, said contacting being conducted at a temperature in the range of about 20.degree. C. to about 25.degree. C.;
- (b) washing the contacted fibers in hot water at a temperature of about 40.degree. C. to about 100.degree. C.;
- and thereafter
- (c) soaping at 20.degree. to 100.degree. C. hot water;
- (d) washing the fibers in water at a temperature of about 40.degree. C. to about 100.degree. C.;
- and then in cold water at a temperature of 10.degree.-20.degree. C.;
- and
- (e) drying the thus-bulked and dyed fibers.
The process of caim 11 wherein the organic acid is maleic acid, fumaric acid, cinnamic acid, phthalic acid or mixtures thereof.
A process for simultaneously bulking and dyeing linear polycarbonamide fibers comprising the steps of:
- (1) treating unbulked linear polycarbonamide fibers wherein at least about 90% of the repeating units in said fibers have the formula:
- ##STR6## wherein R is hydrogen or methyl by contacting said fibers with a non-aqueous mixture of two or more alcohols and an optical brightener, a disperse dye, an acid dye or a mixture of a disperse dye and an acid dye, the treatment being conducted at ambient temperature until optical brightener, dye molecules are fully penetrated and trapped inside the fiber;
- (2) washing the thus-treated fibers in hot water;
- (3) soaping the thus-treated fibers;
- (4) washing the soaped fibers in hot and cold water;
- and
- (5) drying the bulked and dyed fibers.
Dependencies are inferred from the claim text.