The Diffusion of Direct Dyes in Nylon

Morita, Zenzo; Iijima, T.; Yoshida, Tsuguo; Sekido, Minoru

doi:10.1246/nikkashi1898.70.2_180

Cited by 6 publications

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“…Their results, however, were confined to the initial stage of dyeing rather than applying to the whole stage of dyeing. Furthermore, in the same studies (McGregor et al, 1%2; Morita et al, 1967;Karasawa et al, 1975;Komiyama and Iijima, 1974;Komiyama et al, 1977;Tak et al, 1979Tak et al, , 1981, a dual-mode sorption and mobility model which was often employed in studies on the permeation of gases through a glassy polymer film (Paul, 1979;Frisch, 1980) was utilized to explain the overdyeing phenomena. Iijima et al (1980) confirmed the validity of this model experimentally by using the system of low molecular weight, weak organic acid-nylon 6.…”

Section: Historical Backgroundmentioning

confidence: 99%

Chemical Engineering Aspects of Dyeing Processes

Kumazawa

Sada

1988

Polymer-Plastics Technology and Engineering

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Section: Historical Backgroundmentioning

confidence: 99%

Chemical Engineering Aspects of Dyeing Processes

Kumazawa

Sada

1988

Polymer-Plastics Technology and Engineering

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“…It is considered that factor (1) plays a role in the sense that more than one dye is adsorbed on the same internal surface, resulting in reduction of the adsorption as factor (2), not in the sense that there is a limited available 19 Therefore, if the activity coefficient of all ionic species in the fiber and dyebath phase is unity (or nearly equal to unity), the adsorption behavior in mixture dyeing may well be described by eqs. (3) and (8).…”

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Studies on mixture dyeing. IV. Equilibrium adsorption of direct dyes

Morita

Iijima

Sekido

1972

J of Applied Polymer Sci

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synopsisChrysophenine G (C.I. Direct Yellow 12), Benzopurpunne 4B (Red 2), Sinus Red 4B (Red 81), Sirius Supra Blue BRR (Blue 71) and Sky Blue 6B (Blue 1) were selected as typical direct dyes, and the equilibrium adsorptions on cellulose (Cellophane) from the 1 : 1 and 2: 1 molar mixture dye baths were investigated a t 90' and 70°C. The standard affinity in mixture dyeing was obtained by the equation derived from the assumption of monodispersed and diffusive adsorption. The standard affinity in mixture dyeing wm nearly equal to that in single dyeing, except for the Chrysophenine G-Sky Blue 6B system. However, judging from the fiber and solution log sum plots, there was a definite difference between mixture and single dyeing. It was explained by the change of activity of dye and sodium ions on substrate followed by the marked change of the total adsorption. The adsorption behavior of direct dyes is discussed in detail from the viewpoint of concentration dependence of the activity coefficient of dye and sodium ions on the substrate.

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Diffusion of monoanionic dyes in nylon

Komiyama

Iijima

1974

J. Polym. Sci. Polym. Phys. Ed.

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The diffusion of three monoanionic dyes [Orange II (C.I. Acid Red 7) and two chromium complex dyes] in nylon 6 is discussed on the basis of dye distribution obtained by the film‐roll method. Variations of the diffusion coefficients with dye concentration depend characteristically on the dye species and in one case show a maximum near the dye concentration stoichiometric to the amino endgroup concentration in the nylon. These concentration dependences are interpreted on the assumption of two thermodynamically distinct dye populations in equilibrium.

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The Diffusion of Direct Dyes in Nylon

Cited by 6 publications

References 0 publications

Chemical Engineering Aspects of Dyeing Processes

Chemical Engineering Aspects of Dyeing Processes

Studies on mixture dyeing. IV. Equilibrium adsorption of direct dyes

Diffusion of monoanionic dyes in nylon

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