Sadaharu Abeta

Development of novel reactive dyes with a mixed bifunctional reactive system

Abstract The advantages of the mixed bifunctional reactive system—vinylsulphone and monochlorotriazine—with respect to dyeing and fastness properties are discussed in detail.

Compatibility of acid dyes on nylon

Abstract The selection of trichromatic acid dyes with good compatibility for nylon is more complicated than that for cationic-dye/acrylic-fiber dyeing because the dyeing-temperature range in nylon dyeing is much wider than that in acrylic-fiber dyeing. Forty-six commercially available acid dyes have been divided into five groups according to their change in dyeing rate with dyeing temperature, i.e. activation energy. Discussion is made in terms of the molecular weight of the dye, the number of sulfonate groups in the dye, the change in saturation value with pH, and the change in the time of half-dyeing with dyeing temperature. Trichromatic combinations in each group are described.