Method for dyeing cationic dyeable nylon with fiber reactive dyes without heat setting

摘要

A method is provided for dyeing cationic dyeable nylon fibers with fiber reactive dyes. According to this method, an aqueous dyebath is provided containing one or more fiber reactive dyes. The dyebath has a pH of about 1.5 or below. The dyebath is heated to a temperature of at least about 160° F., and the cationic dyeable nylon fibers are immersed in the dyebath for a period of time sufficient for weak bonding to occur between the dye and the fibers. The nylon fibers are removed from the dyebath and immersed in an alkaline solution for a period of time sufficient for the dye to become covalently bonded to the fibers. The cationic dyeable nylon fibers are removed from the alkaline solution and dried.