Method of dyeing a high heat-resistant synthetic fiber material
AssigneeTeijin Limited
InventorsShigenobu Kobayashi, Tetsuo Okamoto
Life of this patent
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Abstract
A high heat-resistant synthetic fiber material containing, for example, aramid, PEEK, or PEN fibers, that can be dyed uniformly at a high color density, with a dye dissolved or dispersed in a liquid medium, for example, water, and having a molecular weight of 330 to 400, at a dyeing temperature of 150.degree. C. or more within a closed system.
Claims5
A method of dyeing a para-aramid fiber material comprised of a copolymer consisting of recurring p-phenyleneterephthalamide units and recurring 3,4,-oxydiphenylterephthal-amide units which method comprises immerse-dyeing said material in a dyeing liquid containing a dye dissolved or dispersed in an aqueous liquid medium and comprising at least one dye compound having a molecular weight of 330 to 400, at a dyeing temperature of at least 150.degree. C. within a closed system.
Dependencies are inferred from the claim text.