Process for level exhaust of cellulose fibers with reactive dyes

Details Process for level exhaust of cellulose fibers with reactive dyes Process for level exhaust of cellulose fibers with reactive dyes

1990-11-26

1992-12-01

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

Measuring, testing, or inspecting dye process

8531, 8532, 8534, 8543, 8549, 8918, D06P 138, D06P 366

Patent

active

051676680

ABSTRACT:
In an existing isothermal dyeing process, the alkali required for dye fixation is added to the neutral dyebath under linear or progressive program control. In this process, the amount of alkali added per unit time is small at the beginning and is increased progressively and in accordance with a program. This process passes through a certain (non-controlable) initial phase until the start of dye fixation on the cellulose. As a consequence the rate of fixation passes through a maximum before gradually decreasing when the final state of the dyeing is reached. To shorten the initial phase (waiting time) of dye fixation and to slow down dye fixation during the steepest part, it has proved advantageous according to the invention to add the alkali in accordance with a parabolic program.

REFERENCES:
patent: 3117957 (1964-06-01), Boyd et al.
patent: 3767356 (1973-10-01), Turner
patent: 4089644 (1978-05-01), Carbowell et al.
patent: 4372744 (1983-02-01), Hildebrand et al.
patent: 4562604 (1986-01-01), Damm
patent: 4629465 (1986-12-01), Hasler et al.
patent: 4645510 (1987-02-01), Hasler et al.
patent: 4656846 (1987-04-01), Damm et al.

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