Method of the finishing of a fabric of cellulose or regenerated cellulose and fabric obtained by said process

摘要

A glazed or lustred finish and also a soft hand and a good dimensional stability are imparted to fabrics of natural or artificial cellulose or derivatives thereof containing reactive hydroxyl groups by impregnating with an aqueous solution containing one or more dimethylol derivatives of ethylene urea, 1,2-propyleneurea, 1,3-propylene urea, 1,3-butylene urea, 2,3-butylene urea or the corresponding thioureas and an acidic catalyst, mechanically treating the impregnated fabric while at a moisture content of from 4-70 per cent calculated on the bone dry fabric and heating to 180-400 DEG F. for a period of 5 seconds to 2 hours sufficient to effect reaction between the derivative and the cellulose, the amount of the derivative applied to the fabric being 0.5-50 per cent of the weight of the bone dry fabric. Heating of the fabric may be effected in part during the mechanical treatment. Fabrics of cotton, ramie, jute, linen, viscose or cuprammonium rayons or mixtures thereof may be treated. Specified catalysts are phosphoric, hydrochloric, acetic, oxalic, tartaric or p - toluenesulphonic acid, sodium bisulphate, ammonium chloride, ammonium phosphate, ammonium thiocyanate and 2-amino-2-methyl-1-propanol hydrochloride. Impregnation may be effected locally, e.g. as by printing, to produce pattern effects. The mechanical treatment may comprise pressing, stamping or calendering to impart a pattern, shape, embossed or crepe effect, or glazed finish to the fabric. The fabric may be dyed before or after the treatment to produce fancy pattern effects. To the impregnating bath may be added lubricants, softeners, stiffeners or water-repellants such as sulphonated oils, sulphonated tallow, starch, sodium polyacrylate, soluble cellulose ethers, ammonium salts of polymers of styrene-maleic anhydride, quaternary ammonium salts, e.g. stearamidomethyl dimethyl benzyl ammonium chloride or cetyloxymethyl benzyl dimethyl ammonium chloride, a partially condensed urea-formaldehyde resin, a polyvinyl acetate dispersion, dimethyl trimethylol melamine, stearamidomethyl pyridinium chloride, s-di-[1-(2-stearoamidoethyl)] urea monoacetate and locust bean gum. Numerous examples are given in one of which the fabric is, prior to the impregnation, dyed and pre-sized with polyethylene oxide.