Abstract
The effects of polymer-electrolyte solution in direct dyeing were studied from the view points of the equilibrium adsorption and the diffusion coefficient of dye within the fiber. The followings were used; Polymer-electrolytes-Sodium Alginate and Sodium Carboxymethyl Cellulose, Dyestuffs-Direct Scarlet B and Chrysophenine G, and Fiber-Viscose Rayon Staple.
The results are
1) In direct dyeing, cations dissociated from polymer-electrolyte act as well as those from inorganic electrolyte.-effect (1).
2) Adversely, polymer-electrolyte adsorbs direct dye itself, therefore, apparent concentration of dye in solution decreases and dye adsorbed on fiber decreases, too.-effect (2).
3) Increased salt concentration decreases effect-(1) and increases effect-(2).
4) The reciprocal correlation between effect-(1) and effect-(2) makes characteristic change of the equilibrium adsorption and the diffusion coefficient.
