Nonaqueous polyamide dyeing process utilizing controlled dye add

Details Nonaqueous polyamide dyeing process utilizing controlled dye add Nonaqueous polyamide dyeing process utilizing controlled dye add

1993-05-28

1994-06-07

Lieberman, Paul

Bleaching and dyeing; fluid treatment and chemical modification

Measuring, testing, or inspecting dye process

8504, 8611, 8924, D06D 500

Patent

active

053185986

ABSTRACT:
A process for the dyeing of a fibrous article containing fibers of a polyamide polymer with at least one anionic dye. The process includes immersing the article in a liquid dyeing bath of a substantially nonaqueous solvent medium and heating to a temperature at least equal to the dyeing transition temperature of the fiber. The anionic dye is added to the dyeing bath so that the rate of dye addition is the primary control over the rate of dye uptake by the article.

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