Patent GB-335583-A (GB)
Title: Improvements in or relating to the manufacture or treatment of textile or other materials made of or containing cellulose esters or ethers
IPC: D06M13/152
Filed: 1929-03-16
Abstract: 335,583. British Celanese, Ltd., and Ellis, G. H. March 16, 1929. Addition to 332,231. Yarns &c., treating with liquids, gases, and vapours; yarns and threads.-Threads, yarns, &c. are produced containing cellulose acetate or other cellulose ester or ether which has been rendered insensitive to the delustering action of moist steam or other hot or boiling aqueous media by the processes of Specification 332,187 and of the parent Specification, and cellulose acetate or other cellulose ester or ether which is sensitive to such delustering action. By treating such materials with a delustering agent designs or patterns may be produced, the less resistant portion of the material becoming more delustered than the more resistant portion. Thus, new effect threads may be obtained by twisting, weaving, knitting or otherwise making up threads, yarns or other materials which have been treated by any of the processes described in Specification 332,187 and the parent Specification with normal untreated threads, yarns or other materials of cellulose acetate or other cellulose esters or ethers with or without other fibres, for example natural silk, wool, cotton or the cellulosic type of artificial silk. Any or all of such types of yarns, treated or untreated in the case of cellulose derivatives, may be coloured before or after treatment. alternatively, the new effect materials may conveniently be prepared by applying a solvent or gelling agent locally to the materials and the materials thereafter subjected to a treatment with dry steam, see Specification 332,187. The local application of the solvents may be effected by any suitable means, for instance a yarn may be printed or stencilled with a thickened paste or preparation containing the solvent or gelling agent or alternatively a travelling thread or yarn may be intermittently impregnated with the solvent or gelling agent by the processes described in Specification 325,823. Suitable solvents or gelling agents comprise resorcinol, hydroquinol, cresols, diacetone-alcohol, diacetin, para-toluene-sulphonamide and the isomeric xylene sulphonamides and their alkyl derivative diethyl-tartrate, pthalimide or mixtures of such bodies. Alternatively, agents of greater volatility, for example phenol, ethyl lactate, glycol ethers or acetic acid may be employed. Colouring matters may be applied at various stages of the processes. For example, suitable colouring matters may be incorporated in the solvent or gelling agent so that after subjection to the delustering agent, the materials may present an appearance of a lustrous coloured design against a white more or less matt ground. Alternatively or in addition, a colouring matter may be present in the delustering agent so that either a uniformly coloured material with a lustrous design is obtained or a coloured matt ground contrasting with lustrous parts of modified shade. Coloured materials may be treated, the solvent or gelling agent being locally applied with or without a further colouring matter. In one example, a satin fabric made from structureless cellulose acetate yarn, which has been previously scoured and dried, is printed with a paste containing ptoluene sulphonamide, methylated spirit, gum arabic and water, dried, steamed with dry steam, washed off and boiled in a soap solution. The printed portions form a lustrous effect against the delustered ground of the unprinted localities and the fabric may be dyed by any known cellulose ester technique. In another example, structureless cellulose acetate yarn in hank form is treated in a bath containing a solution of resorcinol. hydro-extracted, dried without rinsing, steamed with dry steam, soaped lightly and dried. A figured or patterned fabric woven with this yarn as warp and untreated structureless cellulose acetate yarn as weft is now treated in a boiling soap solution. The warp retains its lustre, whereas the weft becomes delustered. In a further example, a fabric containing cotton warp and a weft of structureless cellulose acetate yarn is scoured, dried, printed with a paste containing hydroquinone, methylated spirit, gum arabic and water, dried, steamed with dry steam, washed off and boiled in a soap solution. The fabric is dyed, the cellulose acetate portion orange with para-nitrobenzeneazo diphenylamine and the cotton blue with chlorazol sky blue FF to give a two-colour shot effect with a lustrous design. The Provisional Specification refers to the employment of acetone and aniline as solvents or swelling agents.