Dyeing dry-spun aromatic polyamides

Details Dyeing dry-spun aromatic polyamides Dyeing dry-spun aromatic polyamides

D - Textiles, Paper

06

P

8/31.07

D06P 3/24 (2006.01) D01F 6/60 (2006.01) D06P 1/92 (2006.01) D06P 7/00 (2006.01)

Patent

CA 1061508

ABSTRACT OF THE DISCLOSURE At present it is not possible to adequately dye synthetic fibers which contain aromatic radicals, The present invention seeks to overcome the drawback in the art by providing a process for the production of dyed filaments of aromatic polyamides optionally containing heterocyclic groups which polyamide has not been modified with acid or basic groups, wherein dry-spun filaments of said aromatic polyamides are dyed before or during stretching in an aqueous bath containing a cationic or anionic water-soluble dye.

233099

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