Process for obtaining effects or designs on yarns, threads or fabrics composed of orcontaining cellulose esters or ethers

摘要

Designs are produced on textile materials containing cellulose esters or ethers by applying locally an organic peroxide and subjecting the material to the action of dry or moist heat to effect local destruction of the material. The organic peroxide, e.g. benzoyl peroxide may be dispersed in an organic solvent, or may be used in colloidal suspension, or it may be dissolved in an organic solvent immiscible with water and the solution obtained dispersed in a printing paste. A suitable solvent for the latter purpose is benzyl acetate. In an example, a yarn composed of threads of cotton, silk, and cellulose acetate is impregnated with a dispersion containing benzoyl peroxide, dried, and submitted to the action of heat. In a second example, a velvet having a silk foundation and a cellulose acetate nap is printed with a paste containing benzoyl peroxide. The fabric is then dried and steamed at 100 DEG C. In another example, a dyed velvet having a cotton foundation and a cellulose acetate nap is printed with a paste containing benzoyl peroxide, diethylene glycol, and zinc formaldehyde sulphoxylate, steamed, dried, and brushed. In a further example, a voile in which the warp and/or weft are composed of both regenerated cellulose and cellulose acetate threads is printed in some parts with a paste comprising benzoyl peroxide and butyl tartrate, and in other parts with a paste of aluminium chloride. The fabric is dried, stoved at 110 DEG C., and brushed. In another example, an emulsion of benzoyl peroxide and benzyl acetate in British Gum thickener and sodium sulphoricinate is printed on the reverse of a velvet having a silk foundation and cellulose acetate nap, and the velvet is dried, heated to 110--115 DEG C., and brushed. In a further example, a velvet having a base of silk and a nap of cellulose acetate and regenerated cellulose is printed in three designs, the first with a paste containing benzoyl peroxide and benzyl acetate, the second with a paste of aluminium chloride, and the third with a paste containing benzoyl peroxide, benzyl acetate, and aluminium chloride. The fabric is then dried, heated to 115--120 DEG C. and brushed.