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US 4,066,396 AGranted
Dyeing dry-spun aromatic polyamides
AssigneeBayer Aktiengesellschaft
InventorsGerhard Dieter Wolf, Ralf Miessen, Hans Egon Kunzel, Francis Bentz
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Abstract
The invention relates to a process for the production of dyed filaments of aromatic polyamides which have not been modified with acid or basic group.
Claims11
A process for the production of dyed filaments of aromatic polyamides which comprises continuously dyeing dry-spun gel filaments of an aromatic polyamide which has not been modified with acid or basic groups before or during stretching, in an aqueous dyebath containing a water-soluble, cationic dye in dissolved form.
Dependencies are inferred from the claim text.