Process for improving cellulose fiber properties and for dyeing

Details Process for improving cellulose fiber properties and for dyeing Process for improving cellulose fiber properties and for dyeing

1976-06-16

1979-03-06

Michl, Paul R.

Bleaching and dyeing; fluid treatment and chemical modification

Chemical modification of textiles or fibers or products thereof

Cellulose fibers

8 66, 8162R, D06M 1320

Patent

active

041428536

ABSTRACT:
A process for improving the properties, particularly the dyeing properties, of cellulose fibers. The process comprises impregnating cellulose fiber with an aromatic acyl halide and thereafter immersing the impregnated fiber into an aqueous solution containing more than about 10% by weight of an alkali hydroxide to acylate the cellulose fiber on the surface portion thereof. In another embodiment of the invention, a continuous process for improving the properties of cellulose fiber yarn or fabric is provided. According to the continuous process, uniform acylation is achieved by maintaining the yarn or fabric in a stretched state during impregnation with the aromatic acyl halide and during the initial stages of immersion in the aqueous alkali hydroxide. The acylated cellulose fiber produced according to the invention may be dyed with good color fastness with disperse dyes and still retain the soft tactility characteristic of the fiber.

REFERENCES:
patent: 2170024 (1939-08-01), Heckert
J. J. Willard, Textile Research Journal, vol. 37, No. 4, Apr. 1967, pp. 316-323.
R. W. Moncrieff, Man-Made Fibers, John Wiley & Sons, 1970, pp. 232-233.
Vickerstaff, The Physical Chemistry of Dyeing, Oliver & Boyd, 1950, pp. 253 & 262.

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