US1964169A - Product thereof - Google Patents

Description

Patented June 26, 1 934 I METHOD OF TINTING YARN AND PRODUCT THEREOF Todd Bowman Meisenheimcr, Charlotte, N. 0., assignor to Celanese Corporation of America, a corporation of Delaware No Drawing. Application April 30, 1930, Serial No. 448,804

9 Claims.

This invention relates to the tinting of yarn for temporarily marking of the same, and relates more particularly to the simultaneous tinting and lubricating of yarns containing organic derivatives of cellulose.

An object of my invention is to provide a fluid for the simultaneous fugitive tinting and lubricating of textile yarns, whereby the same may be easily identified and may be readily subjected to m textile operations.

Further objects of my invention will appear from the following detailed description.

Heretofore yarns have been colored with an easily removable dye for the purpose of identifying them as to nature, denier, twist, number of filaments, etc. during textile operations. After a finished product is produced, the color is removed by washing or scouring. Previously, aqueous solutions of acid dyes have been used for this purpose.

iii? In the prior practice, the yarn was hanked and immersed in an aqueous solution of the fugitive dye. This practice is subject to serious defects, especially in the case of the fugitive tinting of cellulose acetate yarn, since the yarns tend to retain a large percentage of water. Because of the presence of this water the yarns tend to stretch under the tensions employed in winding operations, and this excessive moisture causes the yarn to produce packages, which are either too soft or else tend to cake. In any event the presence of the water inthe tinting fluid tends to form textile packages which cause difiiculties when the yarn is unwound therefrom.

I have found that if a tinting material which is capable of forming a solution with an oil and which has no afinity for the yarn to be tinted, is dissolved in a vegetable, animal or mineral oil, in the presence or absence of volatile organic liquids that aid in the formation of a solution,

ill a tinting fluid is formed that may be applied to yarn while it is in transit to a winding device, without causing the undesirable results set forth above.

in accordance with my invention, I prepare a tinting fluid which contains a non-drying oil and fugitive dye capable of forming a solution with the oil. This tinting fiuid may be applied to the yarn in any suitable manner, but the greatest advantages of my invention are obtained by applying the tinting fluid to the yarn while it is in transit to a winding device by means of a roller or wick.

0f the non-g oils that may be used, mineral oils and nomdrying animal or vegetable oils are preferred. I have obtained very satisfactory results with the use of a mineral oil such as paraffin or paraflin oil. As an example of an animal oil, Neatsfoot oil may be mentioned. Of the vegetable oils, castor oil or cotton seed oil may be used. However I found that the use of olive oil gives very good results.

The dyestuff that is used should be soluble in or capable of forming a solution with the oil without the aid of water. Generally it is necessary to employ volatile organic liquids such as ethyl acetate, butyl acetate, amyl acetate, benzene, acetone, methyl or ethyl alcohol, or mixtures of two or more of these liquids, to aid the formation of the solution of the dyestufi with the oil. The dyestuif employed should be easily removable from the yarn to be tinted, and should be sufiiciently light-fast so that the color thereof does not fade too rapidly on exposure to light.

The proportion of various ingredients that are used may be varied within wide limits. Generally the solution will contain from 0.1 to 4% or more of the dyestufi.

The tinting fluid may be applied in any suitable manner such as immersion of the hanks in the tinting fluid. However, I prefer to apply the same to the yarn while it is run into a winding device, and in this case the tinting fluid may be applied by causing the yarn to pass-across a roller, wick or pad that is dipping or otherwise" contacting with the tinting fluid, since this method is most economical and involves the use of a very compact tinting apparatus and also avoids separate winding operations.

The tinting fluid may be applied to the yarn while it is passing to any packaging device for making bobbins, cones, cheeses, hanks, pirns and the like. The tinting fluid may be applied to artificial yarns after their formation but prior to their being twisted and/ or wound. For instance in the manufacturer of cellulose acetate yarn by the dry spinning process, a solution of cellulose acetate in an appropriate solvent is passed through orifices of a spinneret into a heated evaporative atmosphere, and the filaments thus formed are drawn and wound and/or twisted on to an appropriate bobbin or cap spinning machine. When the tinting fluid made in accordance with this invention is used in connection with the dry spinning process, the fluid is applied to the filaments or yarns on the dry spinning machine just after their exit from the casing thereof and just prior to their being twisted and/or wound.

The yarn that may be tinted in accordance with my invention may be of any nature. However this invention is particularly applicable to the tinting of yarn made of cellulose acetate or other organic derivatives of cellulose such as cellulose formate, cellulose butyrate, cellulose propionate, ethyl cellulose, methyl cellulose or benzyl cellulose.

In order further to illustrate my invention but without being limited thereto, the following specific example is given.

Example To color yarn consisting wholly of cellulose acetate filaments for identification purposes, the following ingredients are used.

Quinizarine green base Parts by weight (N. A. C.) (Color Index No. 1078) 2 Solvent assistant 10 Olive oil 190 The solvent assistant may be a mixture of amyl acetate and benzene, approximately in equal proportions. The dyestuff is dissolved in the solvent assistant and the olive oil is added thereto. Upon heating the mixture, a clear homogeneous solution is formed. Since this solution tends to become viscous when cooled, it should be applied in a heated condition.

To apply the fugitive tint, the cellulose acetate yarn is caused to pass across a roller, the lower portion of which dips in the tinting fluid contained in a trough. A closed steam pipe or other heating medium is submerged in the tinting fluid to keep it warm.

The yarn so treated assumes a green color. It can be wound into packages which meet alltextile requirements and the yarn is well lubricated. The fugitive tint does not rub off from the yarn and is quite fast to light. Furthermore the tint is easily removable by mere rinsing in a bath containing 2% of soap. The coloring matter has no afiinity for cotton or reconstituted cellulose, and when a fabric containing the tinted yarn and cotton is rinsed in a bath, no color is imparted to the cotton.

A particular important application of this invention is in the tinting of yarn that is to be used in conjunction with other yarn for the knitting of patterned fabrics.

It is to be understood that the foregoing example is given merely by way of illustration and that many variations may be made therein without departing from the spirit of my invention.

. Having described my invention, what I desire to secure by Letters Patent is:

1. A tinting fluid for the identification of yarn comprising a solution of a non-drying oil and Quinizarine green base.

2. A tinting fluid for the identification of yarn comprising a solution of an olive oil and Quinizarine green base,

3. Method of tinting and conditioning yarn containing cellulose acetate comprising applying thereto a solution of a non-drying oil and Quinizarine green base.

4. Method of tinting and conditioning yarn containing cellulose acetate comprising applying thereto a solution of an olive oil and Quinizarine green base.

5. Method of tinting and conditioning yarn containing cellulose acetate comprising applying thereto a solution comprising an olive oil and Quinizarine green base and a solvent assistant comprising a volatile organic liquid.

6. Yarn containing cellulose acetate tinted with a fugitive tinting liquid comprising a solution of a non-drying oil and a Quinizarine green base.

7. Method of tinting and conditioning yarn comprising applying thereto a tinting fluid comprising a solution of a non-drying oil and Quinizarine green base.

8. Method of tinting and conditioning yarn containing organic derivatives of cellulose comprising applying thereto a tinting fluid compris-, ing a solution of a non-drying oil and Quinizarine green base.

9. Yarn tinted with a fugitive tinting fluid comprising a non-drying oil and Quinizarine green base.

TODD B. MEISENHEIMER.