Патент USA US2105509код для вставки
Patented Jan.’ 18, 1938 2,105,509 TREATMENT OF TEXTILE MATERIALS Harvey A. Schwartz, Cleveland, Ohio, assignor to Industrial Rayon Corporation, Cleveland, Ohio,_ a corporation of Delaware No Drawing. Application March 8, 1934, Serial No. 714,690 11 Claims. This invention relates to the treatment of textile materials to alter the dyeing characteris— tics of the same and, more particularly, to a method of securing cross-dyeing effects by com 5 bining materials so treated with others which have not been treated and dyeing the fabric thus formed. In the manufacture of cross-dyed fabrics, the warp threads may be of one material and the 1" weft threads of another material, the two mate ' (Cl. 8-5) ' The amount of treatment required can be readily determined for any set of operating conditions which may prevail. Preferably, the thread should be exposed in the untwisted condition in order to illuminate a greater thread area and, in CH practice, the thread may be caused to travel be tween a plurality of lights which irradiate all sides of it, the rate of travel of the thread through the zone of exposure being so chosen that the de sired modi?cation of the dyeing characteristics iials having different dyeing properties when the results. fabric is dyed. As a result, one set of threads comes out a lighter shade than the other and a Thread so treated, when woven or knitted into a fabric and compared with a control fabric made cross-dyeing effect is secured. from untreated thread of the same nature, dyes 15 a considerably lighter shade than the control. The treated thread may be stored for a time until it is desired to work the same up into fabric or the irradiation may be effected and the thread As examples of ' 15 materials used for thispurpose, there may be mentioned cellulose acetate yarn and viscose yarn, the mixed fabric giving a two-color effect due to the fact that the viscose yarn takes the dye more readily than the acetate yarn. It has now been found that similar cross-dye ing effects may be obtained by the use of only one kind of thread in the fabric. The result may be secured by exposing a quantity of the thread to the effect of radiation containing actinic rays. 1:‘- The thread thus treated, when woven or knitted into a fabric with other untreated thread, will have previously been of one material and the weft threads of another material, the two materials having different dyeing properties. By means of the present invention, it is possible to secure these take a dye in a different manner from the un cross-dyeing effects by the use of one kind of treated thread and produce effects similar to those achieved by the use of two quite different thread, for example, viscose thread. The vthread to comprise the warp threads is treated with radi then immediately woven or knitted into fabric and dyed. One practical application of the in 20 vention is in the making of cross-dyed fabrics, as mentioned above, in which the warp threads 5“) kinds of yarn. ation containing actinic rays, in accordance with‘ ' It is, accordingly, an object of the invention to provide a method of treating textile materials‘ to alter the dyeing qualities of the same. Another object of the invention is to provide a method of :35 treating‘ arti?cial silk thread consisting essen tially of regenerated cellulose by means of radia the invention, and combined with otheruntreated tion containing actinic rays to modify its dyeing qualities. A further object of the invention is to provide a method of treating regenerated cellu w lose thread with radiation containing actinic rays, incorporating this in fabric with untreated thread, and then dyeing the fabric to secure cross dyeing effects. vOther objects of the invention will inpart be obvious and will in part appear 4.3‘ hereinafter. The method of the invention may be carried out by subjecting thread, such as viscose, cupram monium cellulose or nitro-cellulose thread, to the light from a carbon arc lamp, a mercury vapor 7'" lamp, or the like. All sides of the thread are ex posed to the radiation and the treatment con ' tinued as’long as necessary to give the desired result. The time of exposure will, of course, vary according'to the power of the lamp used and the :35 distance therefrom at which the yarn is located. thread used as the weft threads. The formed fabric is then dyed and, upon completion of this operation, it is found that the irradiated threads have been dyed a lighter shade than the untreated threads, thus giving a cross-dyeing effect. The type of radiation may be varied but it is found preferable to include ultra-violet rays therein. The effect is probably super?cial, ‘af fecting only the surface layer of the individual 40 fibers or ?laments but, whether or not the effect is more deep-seated than this, the fact remains that the dyeing characteristics of the treated ma terial are changed. Direct dyes have shown a distinct contrast when applied to a fabric com posed of treated and untreated threads, but acid and basis dyes may also be applied where cross dyeing is desired. 4 It is intended that the patent shall cover, by suitable expression in the appended claims, what-' ‘' ever features of patentable novelty reside in the invention. What I claim is: ' 1. A method of v securing cross-dyeing effects which comprises subjecting viscose thread to ' 2 aroasoo radiation containing actinic rays, meanwhile controlling the duration and intensity of said and duration of said radiation so as to effect a radiation so vas to effect a modi?cation ‘in the generated cellulose, and, after modi?cation of the dyeing properties of the regenerated cellulose, dyeing properties of said thread, weaving or knitting said thread with viscose thread which li’as not been so treated, and dyeing the fabric so formed. . 2. A method of securing cross-dyeing e?ects which comprises subjecting regenerated cellulose 10 thread to radiation containing ultra-violet rays, meanwhile controlling the duration and intensity of said radiation so as to effect a modi?cation in modi?cation of the dyeing properties Of the re dyeing the same. 5 6. A method of manufacturing dyed viscose thread comprising subjecting the viscose thread to radiation containing actinic rays, meanwhile controlling the intensity and duration of said radiation so as to effect a modi?cation of the 10 dyeing properties of the viscose thread, and thereafter dyeing the same. the dyeing properties of said thread, combining 7. Cross~dyed fabric embodying regenerated said thread in a fabric with thread which has not been so treated, and dyeing the fabric. 3. A method of securing cross-dyeing effects cellulose threads the dyeing properties of which have been modi?ed by actinic radiation. 8. Cross-dyed fabric embodying threads of re generated eellulose the dyeing properties of which have been modified by aetinic radiation and other threads the dyeing properties of which have not been modi?ed. 9. Cross-dyed fabric embodying threads of re— which comprises subjecting regenerated cellulose thread to radiation containing ultra-violet rays, meanwhile controlling the duration and intensity 20 of said radiation so as to effect a modification in the dyeing properties of said thread, combining said thread in a fabric with regenerated cellulose ‘ generated cellulose the dyeing properties of which thread which has not been so treated, and dyeing have been modi?ed by ultra-violet radiation and the fabric. ‘ 4. A - method of manufacturing dyed re ‘ generated cellulose comprising subjecting the re generated cellulose to radiation containing actinic rays, meanwhile controlling the intensity and vduration of said radiation so as to effect a modi? cation of the dyeing properties of the regenerated cellulose, and, after modi?cation of the dyeing properties of the regenerated cellulose, dyeing similar threads of regenerated cellulose the dye; ing properties of which have not been so modi?edv 10. Cross-dyed fabric embodying viscose threads the dyeing properties of which have been > modi?ed by ultra-violet radiation. 11. A cross-dyed fabric comprising threads of normal regenerated cellulose, other threads of 30 similar regenerated cellulose modi?ed by ultra 5. A method of manufacturing dyed regen erated cellulose comprising subjecting the re violet radiation, and a dyestu? in the respective threads added from a single dye bath in varying character and amount according to the extent of modi?cation of said other threads by such ultra generated cellulose to radiation containing ultra violet radiation. ' the same. ' violet rays, meanwhile controlling the intensity ’ HARVEY A. SCHWARTZ.