US1720595A - Process of dyeing - Google Patents

Description

Patented July 9,- 1929.

UNITED STATES PATENT OFFICE.

HERBERT E. GBIER, OF BROOKLYN, NEW YORK, ASSIGNOR, BY MESNE ASSIGNMENTS,

TO B. H. COMEY BROOKLYN COMPANY, INC., OF BROOKLYN, NEW YORK, A CORPORA- TION OF NEW YORK.

No Drawing.

This invention relates to a process of dyeing and has particular reference to the dyeing of articles or materials which cannot be satisfactorily treated with an aqueous dye solution. It is well-known that certain materials or articles when treated with an aqueous dye solution tend to lose their shape or texture and become soft and flimsy or mushy, or undergo other detrimental changes in their physical form or structure. The 'difliculties connected with the dyeing of such materials is well-known and has been the subject of extensive study, and the use of alcohols, benzene and other carriers for the dyes has been tried without very satisfactory results. The present invention aims to provide a process by which articles or materials of the kind mentioned can be successfully dyed without undergoing the detri- 2 mental physical changes above mentioned. More specifically the present invention aims to provide a process for the. dyeing of articles or materials such as loosely woven paper cloth or articles made of loosely wwen paper, such as paper hoods, and similar materials. It has particular reference to the dyeing of straw or straw braids or woven hats made of straw or other vegetable fiber which tend to become soft and lose their shape, and undergo the objectionable changes above mentioned.

In carrying out my invention I first dissolve a suitable wax in a solvent which is best adapted to dissolve the particular wax selected. A mixture of waxes and a mixture of solvents may, of course, be employed if desired. The invention is not limited to the use of any particular wax or any particular solvent, but in carrying out the process a wax of the desired character is selected and then a solvent employed which is best adapted to dissolve the wax. The character of the wax and solvent may be largely dependent upon the operator, his wishes and his supplies, as Well as the cost of the materials. In preparing the wax solution I have found either of the following to give satisfactory results:

1. Dissolve 300 grams of Japan wax in 5 liters of benzol; heat to solution.

2. Dissolve 300 grams of Carnauba wax in 5 liters of xylene; heat to solution.

After the wax solution is prepared, I pref- PROCESS or DYEING.

Application filed November 16, 1926. Serial No. 148,775.

for a short time, usually a few minutes, and

are then removed, and after the adhering material has dripped off the articles are dried. In ,the case of straw or similar hats it has been found desirable to immerse the same in a nested condition in the dying solution. Such hats after being woven and while in the rough state before being shaped can be easily nested together, and it has been found that a number of such hats loosely nested together can be immersed in the dying solution at the same time. Due to the loosely Woven character of the hats and the loose nesting of the same the solution can penetrate to all parts of the same.

I have found that with the foregoing procedure the Wax solution along with the dye material penetrates to a considerable extent the fibers of the article which is being treated. In other words, the solvents employed are good penetrators and as they penetrate the fibers of the material the wax and dye are carried into and thoroughly incorporated with the fibers. The result is that the fibrous articles or materials are thoroughly dyed and also given body and will retain their shape and not become soft and flimsy and lose their form or texture or weave or undergo other detrimental and objectionable changes.

In carrying out my process the step of applying the dye may be performed after the articles have been subjected to the wax solution, that is, the process may be carried out in two se arate operations instead of a single one, alt ough I prefer to mix the dye 1. The process of dyeing fibrous loosel woven articles which tend to become so t and to lose their shape when wet without injuriously afl'ecting their physical form or structure, which consists in treating the articles with a solution containing a wax dissolved in a solvent and a dye incorporated with the solution.

2. The process of dyeing fibrous loosely woven articles which tend to become soft and to lose their shape when wet without injuriously afi'ecting their physical form or structure which consists in dissolving a wax in a solvent, mixing therewith a dyeing ma terial, and immersing the articles to be dyed in said solution.

3. The process of dyeing articles of straw which consists in immersing the same in a solution containing wax dissolved in a solgent and a dye incorporated with the soluion.

4:. The process of simultaneously dyeing a pluralityof woven hats of straw and the like which consists in dissolving a wax in a solvent mixing therewith a dyeing material, immersing the hats in a loosely nested condition in said solution, withdrawing and drying the same.

5. In a process of dyeing fibrous loosely woven articles which tend to become soft and to lose their shape when wet without injuriously aflecting their physical form or structure, the step which consists in subjecting the articles to a solution containing a wax dissolved in a solvent.

6. The process of dyeing fibrous loosely woven articles which tend to become soft and to lose their shape when wet, without injuriously affecting their physical form or structure, which comprises subjecting the articles to a dye solution and a wax solution.

7. The process of dyeing fibrous loosely woven articles which tend to become soft and to lose their shape when wet, without injuriously aliecting their physical form or structure, which consists in immersing the same in a solution containing Japan wax dissolved in a solvent and a dye incorporated with the solution.

In testimony whereof I hereunto aliix my signature.

HERBERT E. GRTER.