Process for continuously or semi-continuously dyeing a poly (m-phenyleneisophthalamide) fibre.

摘要

A process for continuously or semi-continuously dyeing a poly(m-phenyleneisophthalamide) fibre, comprises the steps of (1) contacting a dyeable poly(mphenyleneisophthalamide) fibre with a dyeing solution of an organic swelling agent selected from the group consisting of N-methylpyrrolidone, dimethylsulphoxide, and dimethylacetamide adapted to swell said fibre, and a solvent-compatible dye dissolved in said solution; and (2) heating the poly(m-phenyleneisophthalamide) fibre treated in step (1) to fix said dye to said fibre. An aqueous dimethylsulphoxide solution is used as the preferred swelling agent.