DE3147318A1 - "METHOD FOR APPLYING FIXING FLEETS FOR PRINTING AND COLORING WITH REACTIVE DYES ON TEXTILE COATINGS" - Google Patents

Description

HOECHST AKITENGESELLSCHAFT HOE 81 / F 317 Dr.CZ/cr

Process for applying fixing liquors for prints and dyeing with reactive dyes to textile webs

The present invention relates to a method for the continuous application of liquid preparations unfixed, previously printed with reactive dyes or pad-dyed and optionally dried textiles Fabric webs made from cellulose fibers or mixtures thereof with Polyester fibers by spraying using rotating liquid spray heads.

The production of prints and pad dyeing with reactive dyes on flat structures made of cellulose fibers takes place in practice according to a one- or two-stage procedure. All two-step methods with this orientation have in common that the printing ink or padding liquor is prepared without alkali; only in the second step, so in a second phase, it must then be printed or padded under neutral conditions, if necessary An alkali solution is applied to dried goods, which is used for subsequent fixation of the dye on the fiber is required. As a rule, this chemical solution is applied on a padder two or more rollers instead, with the treated textile material 60 to 100% (based on the weight of the dry fiber material) of the fixing liquor. During the actual fixation operation, the tissue is exposed to the action subjected to heat; In certain cases, this step can also be carried out by standing for a long time at room temperature be worried.

In recent years, there have been a large number of so-called minimal application methods for treatment liquids have been developed, all of which aim to reduce the amount of liquor applied to the textile material. A uniform application is obtained from

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such a project, among other things, that the preparation agent in question is finely sprayed onto the web of material or foamed.

All spray methods are therefore primarily the The idea of an economical use of chemicals compared to other methods in this area.

As far as the known measures in the context of spraying technology are concerned, mechanical spraying is either with compressed air-controlled nozzles (DE-OS 22 49 3 30) or with high-rotation liquid spray heads (FR-PS 22 51 651) performed. The latter generally operate at 30,000 to 50,000 revolutions per minute (rpm).

The finer such a spray mist is, the more even the application of the treatment agent - provided there is no deflection of the mist caused. The droplet clouds are, however, already influenced by relatively weak air currents and thus deviate from the path largely predetermined by the spray characteristics of the nozzle. As a result occurs an undesirable, in places unevenly thick application of the preparation over the textile web. Of course this phenomenon also contributes to a certain burden on the environmental conditions.

To eliminate such drift and to make it more even the spray pattern is therefore obtained according to DE-OS 24 06 831 as well as according to FR-PS 22 51 651 already tried to carry out the process of spraying ^ in an electrostatic voltage field. To this The purpose is to the atomizing device on the one hand and to the metallic base over which the textile goods is led, on the other hand, a high voltage is applied, so that the stress field is perpendicular j η with respect to the Textile web spreads and and the resulting fine liquid droplets have a positive or negative charge

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obtain. These are then applied to the web by electrostatic forces along the electric field lines drawn. However, the use of strong electric fields requires special safety measures; she can be completely ruled out if flammable liquids are to be applied.

Another conception for the fleet order on the Viarenbahn, which is largely independent of the otherwise occurring statistical fluctuations in the ambient air is, according to DE-OS 25 43 524, the spray mist by a suction process evenly over the entire To distribute goods width. As a result of a laminar air flow that runs in the direction of the nozzle jets, get the atomized droplets a safe guidance, whereby a forced flow through the spray mist and of the circulating air through the material web. In this way, besides the regular distribution of the Droplets on the material surface also achieve a depth effect. According to a further development of the Improvement of the suction spray technology in the overall context of the minimum liquor application according to DE-OS 29 32 the spraying is carried out by a high-speed rotation liquid = - speed spray head; the sprayed liquid is additionally directed onto the material web by an air flow directed laterally onto the spray cone.

High-rotation liquid spray heads as well as compressed air Controlled nozzles are only suitable for spraying thin-bodied preparations. One works therefore according to this conventional spray method, e.g. predominantly with aqueous solutions of sodium carbonate or caustic soda. For textile webs of 160 cm 1 to 3 spray heads must be used.

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In addition, all previously available minimal application processes for treatment liquors failed including the previously explained embodiments of the poor controllability at variable speeds and / or the high investment costs for the system.

The task consisted of knowing the inadequacies of the spraying processes known from the relevant literature for the present invention is now consistent with the conventional methods in this field to modify with the needs of the practice and also for the use of higher viscosity solutions of to make available to be sprayed treatment agents. In particular, ways and means should be identified which, while maintaining the positive effects of the working method, allow fixing liquors at variable speeds on a technically simple and inexpensive system to spray.

It has now been found that even minimal amounts of highly viscous solutions can be used uniformly as preparations can spray onto textile webs if the number of revolutions of rotating liquid spray heads of 30,000 to 50,000 rpm is reduced to about 5,000 rpm.

The object set according to the invention is thus solved in that such preparations on rotors the textile material is sprayed, which work at a speed of 3000 to 7000 rpm, preferably 5000 rpm and have a spray width of 5 to 20 cm, preferably 10 cm, per rotor.

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In addition to reducing the number of revolutions of the rotating liquid spray head, this is in accordance with the method the spray width of a rotor is thus also much smaller than that of a high-speed rotary liquid spray head. The necessary number of rotors will be in accordance with the width of the textile arranged side by side in the rotor arm. For better wetting of densely packed or heavier ones To achieve goods quality, the rotor arms can be installed on both sides of the running textile web in the treatment room. This is how it results the same result, to which one can with far more complex apparatus precautions with that in DE-OS 29 32 124 described forced flow through the spray mist Suction gets through the web.

The inventive method can be with particular Advantage for applying minimal amounts of fixing agents containing alkaline substances Use prints and pad dyeings with reactive dyes, surprisingly also with pad dyeings and in the case of textiles printed with large patterns, despite the high amounts of thickener applied and the associated bonding and narrowing of the meshes a sufficiently rapid absorption of the fixing chemicals he follows. The applied liquid is largely removed from the tissue or the thickener film Ink added.

For fixing the reactive dyes applied to the textile web in a two-phase procedure, including the The fixing alkali required can be based on known, continuous or discontinuous techniques operate, such as the damping process, flash damping process, Infrared process or cold dwell process.

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For the preparation application by spraying after the The higher viscosity solutions used in the present invention are predominantly those that are widespread in the textile industry Soda water glasses into consideration. they are

5 'defined by a degree of 37-50 ° Be, which gives a specific gravity of 1.34 to 1.53. Depending on the fixing time required for the type of dye (5 seconds to 24 hours) they are either alone or in a mixture with other alkalis, preferably sodium hydroxide solution, and water used.

The amount of the sprayed solution depends on its Concentration, according to the throughput speed of the textile material as well as according to the concentration and Amount of dye printed or padded on. For more concentrated solutions of the preparation agent the throughput speed can be increased, as well as if the sprayed amount is increased.

As reactive dyes for short Kixit.Txeilan wcrdwi according to the procedure predominantly those selected which have reactive radicals of the formulas I - IV

- SO ₂ -CH ₂ -CH ₂ -HaI (I) - SO ₂ -CH ₂ -CH ₂ -O-SO ₃ X (II)

- NH-SO ₂ -CH ₂ -CH ₂ -O-SO ₃ X (III)

- SO ₂ -CH = CII ₂ (IV)

contain, wherein X is hydrogen or a metal cation and Hal is halogen.

For longer fixed periods (G Mi nu Iran up to 24 stands) In addition to the products listed above, dyes are also used, which are the reactive group Chloraminotriazine, dichloropyrimidine, trichloropyrimidine, Dichlorotriazine, monochlorotriazine, quaternized chlorotriazine or have the dichloropyridazine group.

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The present invention is suitable for fixation of reactive dyes on cellulose fiber materials in web form all types of processing, such as woven, knitted or non-woven fabrics. It enables an order of 15 to 40 percent by weight of the preparation liquor, based on the dry goods. Higher application quantities, for example when the spray fans of two adjacent rotors can result with this ancestor without influence on the sharp stance the prints and the degree of fixation of the dyes. This is a big advantage compared to using the spray method aqueous solutions of sodium carbonate, sodium hydrogen carbonate or sodium hydroxide solution.

The following examples serve to illustrate the invention. The percentages given are Weight percentages and, in the case of the data for the liquor pick-up, are based on the weight of the dry goods. The water glasses according to the examples are each sodium water glass.

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example 1

60 g of the dye Reactive Violet 5 (CI. No. 18 09 7) are in
430 g of hot water are dissolved and the solution is in

500 g of a 4% aqueous alginate thickener are stirred in. In this printing paste preparation one gives then

10 g of sodium 3-nitrobenzenesulfonate are added. 10

A mercerized cotton fabric is now made with this printing paste printed in roller printing and dried. Then the current; Web using Liquid spray heads that rotate at approx. 5000 revolutions per minute (rpm) with "a liquor pick-up sprayed by 30% with a solution that made up

600 ml water glass of 40 ° Be,
200 ml sodium hydroxide solution at 50 ° Be, and 200 ml cold water

consists. To fix the dye, the textile material is steamed 5 seconds in a lightning damper; the printing inking produced is then treated and dried as usual.

A purple print with good fastness properties is obtained.

Example 2

30 g of the dye Reactive Yellow 129 are with 4 58 g of hot water are dissolved and this solution is then stirred into 500 g of a 4% strength aqueous alginate thickener. Then mn η dorn D m rl ·; pns I cMinnr.nl · / noch

2 g Mononal.riiiinplioi .-. Pliü L and
Add 10 g of S-rititrobenzenesulfonynurcjij NaLrium.

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A causticized fabric is made with this printing paste Regeruiral cellulose fibers in flat printing and printed dried. The goods are then treated with a solution as in Example 1 with a liquor pick-up of 35% sprinkled that out

600 ml water glass of .40 ° Be and
400 ml sodium hydroxide solution at 50 ° Be

consists. After a short walk, the textile web is now on a continuously running transport device stored where they can be used for dye fixation Let it stay at room temperature for at least 15 minutes. Finally, the fabric printed in this way is used as usual post-treated and dried.

A yellow print with good fastness properties is obtained.

Example 3

80 g of the dye Reactive Black 5 (CI. Mr. 20 505) be with

408 g of hot water are dissolved and this solution is then stirred into 500 g of a 4% strength aqueous alginate thickener. Then you give the printing paste preparation another 2 g of monosodium phosphate and
10 g of sodium 3-nitrobenzenesulfonate are added.

With this printing paste, a fabric made of mercerized cotton is printed in roller printing and dried. The goods are then sprayed with a solution as in Example 1 with a liquor intake of 35 %

WdisjscM ij 1 ei μ of 30 ° He and
50 cj Kl κηί) I ron

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After a short walk through the air, the goods are dismantled, covered with a plastic sheet and left to stand for 24 hours at room temperature, during which the fixation the reactive dye is effected. To completion 5. After the printing dyeing, the textile material is then aftertreated as usual and dried.

A black print with good fastness properties is obtained.
10

Example 4

60 g of the dye Reactive Red 58 are dissolved in 440 g of hot water and this solution is then _{stirred into 500 g of a 4% strength /} aqueous alginate thickener which already contains 20 g of sodium 3-nitrobenzenesulfonate.

This printing paste is used to print a causticized fabric made of regenerated cellulose fibers using roller printing dried. The continuously running web is now as in Example 1 with a liquor pick-up of 20% sprayed with a solution that made up

500 ml water glass of 38 ° Be,
400 ml of water and
100 g sodium bicarbonate

consists. The textile material is then used to fix the dye 8 minutes in a hanging loop Steamed with saturated steam and then post-treated and dried as usual.

A red print with good fastness properties is obtained.

Example 5

60 g of the dye Reactive Orange 12 are dissolved with 440 g of hot water and this solution is then in 500 g of a 4% ic, en, aqueous alginate thickener stirred in, the already 20 g of 3-nitrobenzenesulfonate sodium contains.

With this printing paste, knitwear is made from regenerated cellulose fibers printed in roller printing and dried. Thereupon the material line is according to the regulation of Example 1 sprayed with a liquor pick-up of 20% with a solution that consists of

60 g sodium carbonate,
64 0 ml of water and
300 ml water glass of 38 ° Be

consists. The printed textile material is now in a hanging loop damper for 6 minutes in order to fix the reactive dye Steamed with saturated steam and then treated as usual.

An orcingon print with good fastness properties is obtained.

B EISP iel 6

A mixed fabric made of polyester fiber / rayon (85:15) is printed in roller-blind printing with a printing paste, which is produced as follows:
A mix of
40 g of the nonionically formed dye Disperse Red 54: 1 and
40 g of the ί 1 üijsitjon trade π form of the reactive dye

Orange 16 (C. '[.Mr. 17, 757) is dispersed initially in 70 g of water at 80-90 ⁰ C and dissolved, and then with

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g of cold water diluted. This dye approach is now in
g of a thickening, which is composed of a mixture of 6 0% of a 3% strength _/ aqueous solution of an ammonium polyacrylate with a molecular weight of 0.6 · 10

and 40% of a 2% strength aqueous solution of a copolymer of propylene and maleic anhydride (molar ratio 1: 1) with a molecular weight of 1.5-10.
10

After drying, the web of material printed in the dicor manner is first the disperse dye by treatment in a hanging loop damper with superheated steam during Minutes at 175 ° C on dom T'olyoMtorrintoil dor fiber mixture fixed. Then the textile material is used to fix the reactive dye on the cellular wool component, sprayed and finished as indicated in Example 2.

An orange print with good fastness properties is obtained.

Example 7

g of the dye Disperse Blue 56 (CI. No. 63 285) are sprinkled into

g water at 4 ⁰ C 0-50 well dispersed using a high-speed. Separately from this, g of the dye Reactive Blue 19 (CI. No. 61 200) in
270 g of boiling water dissolved. Both approaches are then used in

g of cold water entered, the 4 g / l of a wetting agent and 20 g / l of an anti-migration agent contains. The liquor prepared in this way is finally reduced to a PLL word of 5-6 using acetic acid set.

With this liquor, a mixed fabric made of polyester fiber / cotton (50:50) is padded and dried with a liquor pick-up of 60%. Thereafter, the dye dispersion for 60 seconds by thermosol on the tenter: fixed .iittels hot air at 200 ⁰ C on the polyester component.

The cooled goods are now according to the regulation of Example 1 at a liquor pick-up of 3 0% sprayed with a solution that consists of

200 ml water glass of 3C ⁰ Be

60 ml sodium hydroxide solution of 38 ⁰ Be
740 ml water

consists. Subsequently, the web is wound up, wrapped in plastic wrap and stored for 8 hours at room temperature, during which the ReaktivfarbsLoff \\\ i f the cotton j! Proportion of the textile material is fixed. To finish, the dye is then treated as usual and dried.

A blue dyeing with good fastness properties is obtained on both fiber components.

Claims (3)

3U7318 HOE 81 / F 317 -yf- PATENT CLAIMS 1. Process for the continuous application of liquid Preparations on unfixed, previously with reactive dyes printed or block-dyed and optionally dried textile webs made of cellulose fibers or their mixtures with polyester fibers by spraying using rotating liquid spray heads , characterized in that such Preparations on rotors on dar; Textile goods, which are sprayed at a speed of 3000 to 7000 rpm work and have a spray width of 5 to 20 cm per rotor. 2. The method according to claim 1, characterized in that the liquid preparations have higher viscosity solutions Based on soda water glasses with a degree of 37-50 ° Be or a specific weight of 1.34 to 1.53, optionally mixed with other alkalis, can be used. 3. The method according to claim 1 and 2, characterized in that that the fixation of the sprayed prints or block dyeings depending on the strength of the soda washes added alkalis is carried out within a period of 5 seconds to 24 hours.