US1983450A - Delustered rayon and spinning solution therefor - Google Patents

Description

Patented Dec. 4, 1934 PATENT o- -r ca I newsman auoum srnmme som'rron a Frank H. Grlilin, Wawa, 2a., assignor to The Viscose Company, Marcus Hook, 2a., a: corporation of Pennsyl Nu Drawing. Application September so, 193:,

Serial No. 034.013

ZCIa-ims. (Cl. 106-40) This invention consists of a process of producing delustered rayon, and the delustered rayon so produced. i

It has been proposed to deluster rayon yarn 5 by the use of titanium dioxide, but the use of this delustrant carries the objection that it gives to the yarn a peculiar shiny appearance. This appearance may be characterized as metallic, particularly when such yarn is dyed with the deeper shades. For example, the blues tend to show a kind of vcoppery appearance, particularly when viewedin sunlight at certain angles. This phenomenon has been one of the chief objections to the use of this method of delustering rayon. I have found that this disadvantage of the use of titanium dioxide may be eliminated by the use of a delustrant consisting of the combination of chlorinated diphenyl with titanium dioxide. This chlorinated diphenyl (commercially known as aroclor) is itself a delustrant, and adds to the delustering effect of the titanium dioxide, as well as eliminating the peculiar shiny appear! ance which results from the use of titanium alone.

The amounts may vary between 0.1 to 5.0 percent titanium dioxide and between 0.5 to 15.0v

percent chlorinated diphenyl. A preferred example of yarn produced by my invention is one containing 0.6 percent titanium dioxide and 4.5 percent chlorinated diphenyl. This preferred example is as dull as a yam containing 1.3 percent separately or together, are distributed throughout the solution to be spun. prior to the spinning thereof. The required amount of finely divided titanium dioxide is thoroughl mixed with a small amount of water and a dispersing agent, such as, Turkey red oil. $imilarly the required amount of finely divided solid aroclor is thoroughly mixed with water anddispersing agent. The two delustrants might be prepared together in a mixed suspension. These suspensions, either singly or together, are added to the solvent used to dissolve the cellulose xanthate or preferably are added to the cellulose xanthate solution just prior to completion of the solution operation. The xanthate solution containing delustrants is then filtered, aged, de-aerated, and spun in the normal manner. It'is, of course, possible to add the delustrantto the xanthate solution after the filtering and aging but prior to the spinning.

After the titanium dioxide and chlorinated di phenyl are incorporated into the solution as described above, the solution is spun in the usual manner.

I claim:-

1. Viscose solution adapted to be spun into delustered rayon yarn and containing from about 0.1 to 5.0 per cent titanium dioxide'delustrant and from about 0.5 to 15.0 per cent chlorinated diphenyl delustrant, the percentages being based on the weight of the cellulosic content of the viscose solution, the amount of chlorinated diphenyl prescut being substantially in excess of the amount of titanium dioxide, and both delustrants being in the form of finely divided solid particles.

2. As a new article of manufacture, delustered rayon containing from about 0.1 to 5.0 per cent titanium dioxide delustrant and from about 0.5 to 15.0 per cent chlorinated diphenyl delustrant; by weight of the dry'yarn. the amount of chlorinated diphenyl present being substantially in excess of the amount of titanium dioxide.

mm H. cam.