Method of dyeing cellulose fiber-containing structures
AssigneeToppan Printing Co., Ltd.
InventorsTakahiro Fujiu, Masao Nakajima, Shigeru Okano
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Abstract
This invention provides a method of dyeing a fibrous structure containing cellulose fibers. The method includes the steps of impregnating the fibrous structure with an alkaline compound in an amount of from 1 to 20% by weight based on the weight of the fibrous structure and with a modifying agent, the molar ratio of the alkaline compound to the modifying agent being 0.1 to 2.0, and the modifying agent being a compound of the formula ##STR1## where X is --H, --NO.sub.2, --CH.sub.3, or --SO.sub.2 Cl; effecting chemical modification of the impregnated fibrous structure by heat-treating it under steaming or dry heating conditions; and then dyeing the modified fibrous structure with a dye such as a disperse dye.
Claims15
A method of dyeing a fiber structure composed of a cellulose fiber or a blend of cellulose fiber and a synthetic fiber which comprises the steps of impregnating the fiber structure with an alkaline compound in an amount of from 1 to 20% by weight based on the weight of the fiber structure and with a modifying agent, the molar ratio of the alkaline compound to the modifying agent being 0.1 to 2.0, and the modifying agent being a compound of the formula ##STR9## where X is --H, --NO.sub.2, --CH.sub.3, or --SO.sub.2 Cl;
- effecting chemical modification of the impregnated fiber structure by heat-treating it under steaming conditions at a temperature of from about 100.degree. to 180.degree. C. or dry heating conditions at a temperature of from about 60.degree. to 180.degree. C. for a time period not exceeding 20 minutes;
- and then dyeing the modified fiber structure with a dye selected from the group consisting of a disperse dye, an oil-soluble dye, a mordant dye, and a basic dye.
Dependencies are inferred from the claim text.