DE2416259B2 - PROCESS FOR FIXING COLORS OR PRINTING ON TEXTILE GOODS - Google Patents

Description

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The invention relates to a method for fixing dyeings or prints on textile material made of cellulose fibers or their mixtures with synthetic fibers, in which the fixation of the dyes necessary chemicals are applied to the textile material as foam.

In the two-phase process for developing vat, leuco ester vat and reactive dyes, particular difficulties arise in the second stage of the process, namely the application of the fixing chemicals to the padded or printed textile material: the correct dosage of the supplied liquor which contains the chemicals , is led ^ _L ^ £ ^ - ^ S ^^ on that

~ "* ^M - * applied-

According to the invention, the fixing notes are applied Foam shape allows it in machine technology

possible overdosing on is without harmful input

Nacn aer aeuisuicn Offenlegungsschrift 21 45 827 and German Offenlegungsschrift 22 43 865, it is known to use textile materials with the aid of To color or finish foam discontinuously. Likewise, in the magazine Textilveredelung 6 (1971), No. 11, pp. 708 to 711, a process like that called, after which one means of foamed dye liquors and by utilizing centrifugal force Can dye piece goods discontinuously. Furthermore, it is known from the German Auslegeschrift 13 36 662, to apply an impregnating agent in foam form to a textile web and there with mechanical Distribute funds evenly. Finally, according to German Offenlegungsschrift 2214 has already been explained, dyes and / or finishing agents and, if appropriate, for fixing them to apply the required chemicals in foam form to textile fabrics. At this last described procedure but the advantage of a small amount of liquid applied is neither required still used; In addition, the foam is used there for dyeing and finishing, both of which Finishing types may be carried out at the same time and, if desired, also pattern and multi-im Connection mn uicsci novel application method is probably a certain increase in the concentration of the fixative in the liquid phase of the foam is necessary, but at the same time the amount of fixative liquor used is also reduced enables. Overall, it is thus possible when applying z. B. 20% liquid phase in the form of z. B. 1 to 5% foam a reduction in the amount of chemicals on z. B. 10% of the usual To achieve quantities.

The foam form of the fixing chemicals which is used according to the method continues to make it possible a perfect and even distribution of the same. Besides, it is by the extremely low Water content of the foam - in extreme cases even below 1% water - possible, the amount of chemicals to dose very precisely. The consistent foam never has a liquid character and therefore prints cannot bleed with this type of fixing. You keep sharp contours. A padded dye cannot be removed here. This way of working can also Prints z. B. on the basis of a petrol emulsion

lying to be treated with the foam. The reactive dyes are also used a foamed emulsion is possible. borrowed alkali in the form of lye, water glass or

To make a soda according to the claimed method, it is applied in foam form, technically flawless work flow and a process can also be used in accordance with the application

even, level foam application to ensure a soda-alkaline reduction of vat dyes, however, it is advisable to foam the foam concentrate system, not to keep trati'on on the goods too low. More on the fixation and development of dyes

But foam is synonymous with more liquid from combinations of naphtholates and stability so that under certain circumstances the state and its diazo compounds is z. B. a 5% The contour sharpness of the prints will be impaired "> Foam puffed up, containing 10% formic acid In these cases it is therefore advisable that the liquid phase contains an air duct of the so treated Goods from 60 see are sufficient for the development of the dye on the fiber on which it is applied was previously printed.

15 When supplying fabrics printed with vat pigments with the fixing chemicals, the addition of a suitable defoamer to the printing pastes is particularly important because the air-containing foam should have disintegrated before it enters the damper, so that the harmful influence of the trapped air is eliminated.

The following examples will illustrate the invention Working method explained in more detail.

That has been achieved in the examples for the colors used. With the usual Fou- »5 substances specified color index numbers, larding processes were taken from alkaline fixation liquors.
why this water with otherwise unnecessary salts
must be enriched to prevent the outflow of the
To prevent dyes. A reduction in the 3 °
The amount of water also allows the
Salt solutions so that chemicals have two effects
savings are made: less liquor and lower salt concentration.

To carry out the present process, it is expedient to use known methods, z. B. with the help of foam extinguishers, a permanent ("long-lasting") foam produced without that consideration must be given to the time of the spontaneous collapse. * ° are suitable as foaming agent preferably products based on triethanolamine alkyl sulfates of the general formula

liquid phase of the foam up to 10% inorganic salts, such as. B. table salt or Glauber's salt to add or with coagulable thickeners to work in the printing paste.

In contrast to the prior art mentioned at the outset, in the present method the dye solutions in the usual way on the textile material by padding or applied by printing. However, the alkalis or necessary for the fabric fixation Acids applied as a foam. This makes the second phase of the application process a more economical one Dosage of the amount of alkali than before

The percentages used mean percent by weight.

example 1

A knitted cotton fabric is printed with a printing paste that

15 g of the dye C.-I.-No. 61200 (blue), 2 g primary sodium phosphate,
483 g sodium alginate (in 5% aqueous

Solution) and
500 g water in
contains lOOOg.

RO-SOsH · N (CH ₂ -CH ₂ -OH) ₃ ,

After drying, a 5% aqueous foam is applied to the fabric, its liquid foam Phase 10% of 30% sodium hydroxide solution and 1% alkyl polyglycol ether sulfates of the general formula * 5 foam concentrate based on triethanolamine

Contains coconut fat sulphate.

After leaving the device, the goods provided with a foam layer are subjected to a steaming

where R is an alkyl radical having 12 to 14 carbon atoms, X is an alkali metal or ammonium ion and η is numbers from 2 to 5, and mixtures thereof without restriction of the mixing ratio. Butydiglycol is preferably used as the solvent for the production of these foam concentrates and small amounts of enes fatty alcohol, e.g. B. Lauryl alcohol is also used. These foam concentrates are added to the aqueous fixing liquor in concentrations of 0.5 to 3% to produce a long-lasting foam.
The printing pastes or padding liquors contain

supplied to the unit and treated there with steam at 100 ° C for 20 seconds. After washing and drying there is a blue print on a white background.

Example 2

A 400 g heavy cotton terry product is with 25 g of the dye C.-I.-No. 71 105 (orange) printed been. In addition to the dye, the printing paste contained 50 g of starch ether (in the form of a 10% aqueous solution) and 0.5 g of silicone, the dyes, preferably a foam-destroying defoamer, rendes (because of the possible drying process. After leaving the printing units, the

non-liquid auxiliary), e.g. B. silicone-based, the still moist product with a 5%, wäßriden Foam on contact with the goods collects foam, which is produced with the addition of 2% of a mifall leaves, with the entire liquid portion of the schung (1: 1) from triethanolamine coconut fat sulfate and Foam with the fixative contained therein then immediately 65 the ammonium salt of coconut fatty acid triglycol is made usable. Ether sulfate was generated, coated. The liquid one

The claimed fixing process is predominant- phase of this foam consists of 5% caustic soda end for fixing dyeings and prints with a solution in which 5% sodium dithionite is also dissolved

became. The foam layer is 2 mm. Shortly after leaving the foaming device, the foam breaks together and the aqueous phase is absorbed by the printed fabric

After foaming, the goods enter immediately without Drying in a steamer and treated there with steam at 120 ° C for 1 min. After rinsing, Oxidizing and washing the goods treated in this way gives a bright, orange print white ground.

Example 3

A linen fabric weighing 350 g is made with a printing paste as in Example 1, but using of 15 g of the dye C-L-No. 18 852 (yellow), printed and with a foam according to Example 1 coated.

The foamed and stripped-off linen fabric is then paneled in a heating tunnel at 60 ° C. and stored there for 10 minutes and finally washed. A golden yellow pattern is obtained on a semi-white background.

Example 4
A mix of

15 g Azoic Coupling Component 2 - C-L-Nr. 37 505 and

10 g of p-nitroaniline in the diazoamino compound

stabilized form of its diazoni-

salted

xo are dissolved in 11 2% sodium hydroxide solution and thickened with locust bean gum ether. This printing ink is printed on a cellulose fabric and this is dried.

A 10% aqueous formic acid is then used

with the addition of 1.2% foam concentrate based on the ammonium salt of coconut fatty acid triglycol ether sulfate foamed and applied to the goods.

After the foam has been doctored off, the goods are

exposed to an air passage of 60 seconds, whereby the

hue created in this way is developed to its full strength. the Development of the dye can be enhanced by heating with infrared rays. It will be a red one Preserved print on a white background.

Claims (3)

Lft im * color effects patent claims: 1. Process for fixing dyeings or prints on textile goods made of cellulose fibers or their mixtures with synthetic fibers, in which the necessary for the fixation of the dyes Chemicals are applied to the textile material as foam, characterized in that that the fixing is carried out by a two-phase process, the chemicals necessary for fixing the dyes be applied as foam to the previously padded or printed textile material. 2. The method according to claim 1, characterized in that the padding liquor or the printing paste contains a foam-destroying agent, which when the textile and foam come into contact Triggers foam breakdown. 3. The method according to claim 1, characterized in that for dyeing the cellulose fibers or the cellulose fiber content in mixed fabrics vat dyes, leuco ester vat dyes, stabilized azo dyes or reactive dyes are used. Case of acts 5 ren, at exercises to even come Goods - <■ * ° place. From the a two]. exercises on