Dyeing of Nylon With Acid Dyes

Yoshida, Minazo; Hirota, Hajime

doi:10.2115/fiber.12.662

Cited by 3 publications

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Effect of some aromatic hydroxy sulphonic acids on uptake of acid dyes by nylon 6

Guthrie

Cook²

1982

J. Chem. Technol. Biotechnol.

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The major constituents of a synthetic tanning agent for leather, prepared from the condensation of a naphthol sulphonic acid with formaldehyde, have been separately synthesised and have been shown to be of low molecular weight. The effect of these ‘syntan components’ on the uptake of four acid dyes by nylon 6 has been studied as has the desorption of the agents during the uptake of dye. Although the components have only a minor effect on the rate at which dye is adsorbed by the fibre, they reduce the extent to which dye is taken up at equilibrium. The restraining effect observed is governed by the affinity of both dye and agent. It is concluded that unlike commercial syntans which are available for the aftertreatment of dyed nylon, the products studied diffuse readily into the polymer matrix and, after application to nylon, are not held firmly at the fibre surface.

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Effect of some aromatic hydroxy sulphonic acids on uptake of acid dyes by nylon 6

Guthrie

Cook²

1982

J. Chem. Technol. Biotechnol.

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The Ef]fect of a Synthetic Tanning Agent on the uptake of Acid Dyes by Nylon 6

Guthrie

Cook

1982

Journal of the Society of Dyers and Colourists

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The effect of pretreating various nylon 6 fibres with a synthetic tanning agent on the rates of dyeing of five acid dyes has been studied. From the adsorption properties of these dyes on nylon 6 samples differing in amine end-group content, it is shown that as the basicity of the dye increases, the saturation value tends to approach more closely to the content of amine end-groups in the fibre. For a monobasic, hydrophobic dye, the saturation value is not governed by the amine end-group content of the fibre. Assuming that an increase in hydrophobicity results in a higher dye anion affinity, it is suggested that as the affinity of the dye for the fibre increases, the rate of dyeing becomes less affected by the presence of the synthetic tanning agent. For dyes of low affinity and greater hydrophilic character, the rate of dyeing of pretreated nylon is initially low but increases as the dyeing proceeds. It is postulated that this is caused by the initial deposition of the syntan in the outer regions o f the fibre ac tiny as a partial barrier to dye diffusion. Although the syntan does not desorb significantly during dyeing, it diffuses slowly into the fibre and gradually loses some of its retarding influence.rinsed thoroughly in distilled water and allowed to dry in the atmosphere.Amine End-group Determination [51 Samples of scoured nylon 6 (ca 100 mg) were weighed accurately and placed in conical flasks containing 10 ml of a

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Advances in Wool Technology

Johnson¹,

Russell²

2009

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Dyeing of Nylon With Acid Dyes

Cited by 3 publications

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Effect of some aromatic hydroxy sulphonic acids on uptake of acid dyes by nylon 6

Effect of some aromatic hydroxy sulphonic acids on uptake of acid dyes by nylon 6

The Ef]fect of a Synthetic Tanning Agent on the uptake of Acid Dyes by Nylon 6

Advances in Wool Technology

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