DE2100546C3 - Method of waterless dyeing - Google Patents

Description

15th

The invention relates to a method for waterless dyeing of yarn or threads, in which the color in Form of a mixture of colorings and a suitable pancake using usual Schmälzeinrichtung is discharged.

A method in which jute fiber is dyed simultaneously with the melting by adding a dye to the thin oil is known from US Pat. No. 1,528,698. In this process, however, the ² S dyeing of the loose fibers takes place before they pass through the carding zone, with fixing being provided immediately after the melting. This has the disadvantage that the coloring process does not take place very uniformly; in addition, the process is limited to jute fibers.

The invention is therefore based on the object of creating a dyeing process in which the dyeing process in the course of the production of a yarn is optimal and a fixation only at the end of the spinning process he follows.

According to the invention, this object is achieved in that the mixture is broken up during the spinning process applies to the top and the yarn is combined into strands after the spinning process has ended Subjected to autoclaving.

As is well known, spinning machines are provided with a skiving device for the roving or sliver, without which they cannot function properly. In the method according to the invention, the Use the usual lubricating or lubricating devices without changing them in the slightest have to. The operations of spinning and dyeing the yarn can therefore be carried out simultaneously by using a mixture of liquid coloring agents and an ointment which is suitable for both the fiber material as well as for the dyes is suitable or compatible with it.

Of course, the preparation of the mixture of color and lard depends on which one is to receive desires, always liquid dyes are added in proportions that have previously been carried out in laboratory tests has determined.

The application of the dye can be carried out in a simple manner by using a suitable and in appropriately controllable application device is used, the origin and construction of which is irrelevant, provided that it has a reliable and controllable lubrication system with pump and compressor in order to ensure a completely even supply of the mixture.

The mixture of dye and sausage is poured into the associated container and over the usual Feed system promoted to the top, care must always be taken to ensure the delivery in such a way control that about 6% of the mixture per unit weight of top draw, i.e. H. 6 kg mixture per 100 kg Combed top can be applied. In the case of dark or medium solid colors, it is advantageous to click on the the same or a different machine to carry out a second pass with at least 3% of the mixture, the first pass must be reduced to about 4%. You get a lot that way even coloring quickly.

Care should always be taken to ensure that the total amount of dyes in the mixture used does not exceed the proportion of sludge, otherwise difficulties arise in the actual spinning process. This is achieved in that the dyes are each in the necessary concentration for use come.

The method according to the invention, which has been thoroughly tested in conjunction with threads made of strong acrylic fibers can also be used for other synthetic or natural fibers, which you can use after the Principle of "comb spinning" works.

The eifmdungsgemäße method also leaves a Mixing of two, three or more colors without causing any delay in the thread or Thread production occurs.

After applying the mixture, the yarn can be passed on to the following without melting it again Machines are forwarded. It is precisely at this point that the mixture begins to work Dimensions of how the individual process steps follow one another, the entire yarn completely dyes without the machines through which the yarn passes are damaged or excessively soiled. It has it has been shown that the degree of pollution is many times smaller than in the case of a usual., for Wool used blend.

As soon as the roving process is finished, a uniform coloring appears, but only at this point determine the final result of the impregnation and uniform coloring during final spinning can.

The color only needs to be fixed. For this purpose, the yarn, combined into strands, is placed in an autoclave, preferably an automatically operating autoclave, so that there are no differences between fixation and fixation.

In the case of strong acrylic threads, for which the method has proven itself to be excellent in tests, it works fixation take place simultaneously with shrinkage; in most cases, neither the residence time is extended nor the temperature is increased. You get even better results in an autoclave that allows a vacuum to be built up.

Generally the fixation is done in a heated one Environment carried out, the temperature being adapted to the individual types of fiber. For acrylic fibers lies the temperature is generally between 100 ° and 103 ° C; in the case of polyester it can be increased to 130 ° C will. The residence time is variable and depends on the intensity of the color and the one used Dyes from; in no case a dwell time of more than 30 minutes is necessary.

This machining operation does not require a direct supply of steam and even less the supply of Humidity. In any case, contact with water must be avoided; for this reason

21 OO

The process is known as a "waterless dyeing process".

After completion of the machining process, the yarn is in a state in which it is at its Place of use can be brought. In most cases you can do without rinsing it beforehand or to make it supple. Mixed fiber yarn, on the other hand, requires a washing or washing after fixation Rinsing process in order to exclude soiling of the non-colored fiber material, although to all peculiarities of the procedure with regard to its reliability are preserved.

Some other advantages of the process are listed below:

In addition to the facilities that are already required, no further facilities are required.

A time saving is achieved because the dye is used during the normal spinning process is applied and the thread is unbleached.

Any worsted spinning mill that does not have a dye works can produce color tones without outside help manufacture and reproduce.

The process reduces those normally occurring between spinning and finishing Damage by 80%, thus reducing costs.

It provides the prerequisite for the previously impossible re-coloring, primarily for Fibers that are usually colored by full or partial saturation.

It is characterized by greater reliability because the dye is applied evenly and is used without the need for auxiliary materials, which affect the reliability of the coloring.

There is no saturation of the fibers because it will made use of all the originally existing properties of the fibers There is no need for water, which is a major problem for certain companies.

The process allows the coloring of strong fibers with solid colors or mixed colors, which was only possible until now was made possible by the fact that the dyes in the pulp, d. H. during fiber preparation entered.

Claims (1)

21 OO Claim: Process for the waterless dyeing of yarn or threads, in which the color is in the form of a Mixture of dyes and a suitable smear using a customary one Schmälzeinrichtung is applied, thereby characterized in that the mixture is applied during the spinning process on the top and the yarn after completion of the Spinning process combined into strands subjected to an autoclave treatment.