US1533769A - Process for dyeing textile and like material - Google Patents

Description

Patented Apr. 14, 1925.

UNITED STATES MARIA SCHO'LZ, F LEICHLINGEN, GERMANY.

PROCESS FOR DYEING TEXTILE AND LIKE MATERIAL.

No Drawing. Application filed January To all whom it may concern:

Be it known that I, MARIA SoHoLz, citi= zen of Germany, residing at Leichlingen, Germany, have invented certain new and useful Improvements in Processes for Dyeing Textile and like Material, of which the following is a specification.

This application is divisional of my copending application, Serial No. 647,759, filed June 25, 1923.

The present invention has reference to improvements in the art of dyeing textile fabrics, paper, and like material, and it relates more particularly to improvements in the step of fixing the colors, and the object of the invention is to greatly shorten and cheapen the dyeing process, and more speciand after-treating the material up to the fically the fixing operation therein, and at the same time improve the color fastness of the goods thus treated.

,In the prior art the dyestufls are generally fixed by. subjecting-the dyed material to the action of steam within a closed chamber or treating it by the Mather-Flatt process.

i These procedures are time-consuming, ex-

pensive and do not yield an evenly dyedthrough material.

My invention broadly consists in suitably dyeing the fabric, the term dyeing to include the various steps known in the art of preparing the material-for the reception of the dyestuffs and for applying the latter commencement of the fixing step, and in then fixing the material within a relatively very short time by means of a hot fat-dissolving medium, such as hydrocarbon, and in then removing the fixing medium again from the material and after-treating the lat- 'ter in any required manner.

I have found an indifferent organic solvent, such as hydrocarbons, at a relatively high temperature eminently suitable for this fixing purpose. In this connection the term indifferent is to ex ress the meaning that the solvent can well Ive oils or fats but 17, 1925. Serial No. 3,048.

is indifferent to the dyestufi', that is to say, does not dissolve the latter.

The hydrocarbons suitable for our purposes include those of the benzol group and of a benzol hydrocarbon of an anthracite distillate, also hydrocarbon derivatives, such as carbon tetrachloride, ethylene trichloride, and others.

The material is passed into the hot hydropreviously dyed and finished by other processes to render them still more color-fast. This is of great moment since it permits the v use of cheaper grades of d 'estutfs with per- '65 feet results in the finishe products.

The fixing agent is thereupon suitably removed again from the fabric and can be re covered in well known manner for further 7 use. The goods are finally washed and aftertreated in suitable manner. Goods treatedin this manner are color-fast to all tests to the highest degree.

1. The described step in the art of dyeing,

which consists in passing the dyed material through a quick-acting hot bath of dyeindifi'erent fat-dissolving medium.

2.. The decribed step in the art of dyeing,

which consists in relatively quickly passing so the dyed materal through a hot hydrocarbon bath.

3. The described step in the art of dyeing, which consists in relatively quickl passing the dyed material through a hot ath of a' hydrocarbon of the benzol group.

4. The described step in the art of dyeing,

MARIA SCHOLZ.

The new process can also be 6 used to advantage fior imtprovmggoodsl