JPS5898485A - Coating of fixing liquid for printing or dyeing strip like fabric by reactive dye - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is based on the invention by means of a rotary liquid spraying process on textile webs consisting of poorly fixed, previously printed or badged dyed with reactive dyes and optionally dried cellulose fibers or mixtures thereof with polyester fibers. It relates to a method for continuously applying a liquid formulation by spraying with a head.

Form P of printing and padding dyeing with reactive dyes on plain articles made of cellulose fibers is carried out in practice by a one- or two-stage process. All two-stage processes in this case have in common that the printing ink or bagging liquid is prepared without alkali. First, in a second carrying out step, an alkaline solution, which is necessary for the subsequent fixation of the dye on the fibers, is applied to the dried article, which may then be printed or badged under neutral conditions. The application of this chemical agent solution is carried out on a bagging machine, usually having two or more rolls, in which the treated textile fabric 6 is exposed to the fixing liquid 6.
Absorbs 0 to 100 inches (based on the weight of the dry fibrous material). During the actual fixing operation, the acid is subjected to thermal action, which in some cases can also be cleaned up by long exposure at room temperature.

In recent years, a number of so-called minimum-application methods of treatment liquids have been developed, all nuclear methods aimed at reducing the amount of treatment liquid applied onto the textile fabric. A coating as uniform as possible can be obtained, for example, by spraying or foaming the formulation in finely dispersed form onto the textile strip.

First of all, therefore, the idea of using fewer chemical agents forms the basis of all spray methods compared to other methods in this field.

With respect to known means within the scope of atomization technology, mechanical atomization can be carried out by means of compressed air-controlled nozzles (German Patent Application No. 2249550) or by means of high-speed rotating liquid spray heads (French Patent Specification No. 225165i).
No.) will be implemented. The latter is generally between 5oooo and 50 per minute.
000 revolutions (times/minute).

1-The finer the spray mist, the more uniform the treatment agent will be again (as long as the mist is not deflected). In the meantime, the turbidity of the droplets is already affected by the relatively weak air flow and dries out, which then deviates from the wide predetermined band due to the atomization characteristics of the nozzle. The result is an undesirably unevenly thick coating of the formulation on the textile web. Naturally this phenomenon also presents certain problems of environmental conditions.

Therefore, in order to interrupt such drifts or to homogenize the spray formation, it has already been proposed in German Patent Application No. 24O6851 and French Patent Specification No. 2251651 to carry out the atomization process in an electrostatic voltage field. ing. For this purpose, a high voltage is applied on the atomizing device on the one hand and on the metal substrate on which the textile is guided on the other hand', so that the voltage field extends perpendicularly with respect to the textile web and the resulting fine liquid fraction #8 is Holds a positive or negative charge. This is then attracted onto the textile ribbon along the electric field lines by electrostatic forces. However, the use of strong electric fields requires special safety precautions, which should be completely excluded if flammable liquids are to be applied. Another idea for the application of treatment liquids onto textile webs - which are significantly independent of the otherwise occurring electrostatic fluctuations of the ambient air - is described in German patent application tjlE 2545.
According to No. 524, an 11 rfs mist is dispersed over the entire textile by a suction process. As a result of the laminar air flow extending in the direction of the nozzle jet, the atomized droplets obtain a reliable guidance, which causes the web-shaped textile to be exposed to the atomized mist and (#I).
A forced inertia of air is achieved at f1. In this way, besides a regular distribution of the droplets on the material surface, a depth effect is also achieved. According to German Patent Application No. 2952124, the processing liquid - in all connection with the minimum application - in accordance with developments to improve suction-spraying technology, atomization is carried out by means of a high-speed rotating liquid spray head, and the atomized liquid is additionally The air stream is directed onto the textile web by means of a spray pin directed on one side.

High speed rotating-liquid spray heads and compressed air controlled nozzles are of course only suitable for atomizing dilute liquid formulations. This customary spraying method is therefore carried out, for example, using primarily aqueous solutions of sodium carbonate or caustic soda. For medium 160 cM strips of textile fabric, one to five spray heads are used.

Furthermore, all previously available minimum-dispensing methods of processing liquids, including the previously described configurations, suffer from poor controllability in variable speeds and/or high investment costs for the equipment.

Knowing the imperfections of the spraying methods known from the relevant literature, the task of the present invention is to improve the conventional method in accordance with the practical requirements in this practice and also to reduce the high viscosity of the treatment agent to be sprayed. The purpose is to make the solution usable. In particular, it is also to be found an agent and a method which makes it possible to spray the fixing liquid at variable speeds in equipment that is industrially simple and as inexpensive as possible while retaining the positive effects of the implemented process.

The inventor has determined that the number of rotations of the rotating liquid spray head is 5.
It has been found that a reduction from 0,000 to 50,000 times/minute to about 5,000 times/minute allows a minimum amount of a highly viscous solution to be uniformly sprayed onto the textile web as a formulation.

That number is set by the present invention a! The problem is that such a formulation is moved at a rotational speed of 3000 to 7000 revolutions per minute, preferably 5000 revolutions per minute, and then
The solution is to spray onto the textile via a rotor with 0 spray holes.

In addition to reducing the number of rotations of the rotating liquid spray head, the method also allows the rotor to rotate at a high speed during spraying - significantly smaller than that of the liquid spray head, in line with the textile article, thus reducing the required number of rotors. are arranged in sequence on a rotor carrier. In order to achieve better penetration of closely packed or heavier article qualities, rotor carriers can be integrated in the processing chamber on both sides of the running web web. In this way, the same results as can be achieved by suction through a textile web by forced inertia of the spray mist as described in German Patent Application No. 2,932,124 are to be achieved with precautions on a much more expensive device.

The process according to the invention allows fixing agents containing minimal amounts of alkali-active substances to be used with particular advantage for printing with reactive dyes and for bagging dyeings, with the result that it is surprisingly possible to use fixing agents containing minimal amounts of alkaline-acting substances in the case of padding dyeings and for large patterns. In the case of printed textiles, despite the high amounts of thickener applied and the associated adhesion and shrinkage of the mixture, a sufficiently rapid absorption of the fixing chemicals takes place. In this case, the applied liquid is absorbed to a large extent by the thickener film of the textile or printing ink.

Continuous or discontinuous techniques known for the fixation of reactive dyes - including the necessary fixing alkalis - applied in a two-phase manner onto textile webs, such as steam methods, flash steam methods, infrared methods or cold retention. - method can be used.

For application of the formulation by spraying according to the invention, soda water glasses, which are popular primarily in the textile industry as highly viscous solutions, come into consideration. It is defined by a density of 57-50@B5, which corresponds to a specific gravity of 1.54-1.55. Depending on the fixation time required for the dye type (from 5 seconds to 24 hours), it can be used alone or in admixture with another alkali, especially caustic Noda solution, and water.

The amount of spray solution depends on its concentration, the flow rate of the textile material and the concentration and amount of printed or badged dye. For thicker solutions of the formulation, the flow rate can be increased if the jet gt is increased as well.

As reactive dyes for short fixation times, this method mainly uses the formula 1-■-So,-嘱-C%-Hal(1)EO@-C5H@-Island-0-IslandX (n
)7 NH-80, -aHl-tya, -o -So,
! (…) −8 to 14 = aa spirit
The dye containing a reactive residue of (■) (where xFi hydrogen or metal cation is replaced and Hal means halogen) is selected.

For longer fixation times (6 minutes to 24 hours), in addition to the above-mentioned products, chloraminotriazine-
, cyclorubi 1J midine, trichlorpyrimidine,
Dyes with dichlorotriazine, monochlortriazine, quaternary chlortriazine or dichlorotriazine groups may also be used.

The invention is suitable for the fixation of reactive dyes on all kinds of processed products, such as strips of cellulosic fiber materials such as woven, knitted or fleece fabrics. The present invention uses a blended treatment liquid of 15 to 4 for dry articles.
Enables coating of 0% by weight.

Higher coating weights, such as Y obtained when overlapping two side-by-side Rogue spray fans, do not in this process affect the sharpness of the print and the degree of fixation of the dye.

This means that sodium carbonate, sodium bicarbonate or Fi
This method is superior to the spray method using an aqueous solution of caustic soda.

The invention is illustrated by the following examples. The percentages stated are therefore percentages by weight, and in the case of the statements regarding the processing liquid absorption, the water glass in the 21 examples with respect to the weight of the dry article is in each case reduced to the soda water glass.

Example 1 Dissolve 60f of Dye Reactive Violet 5 (CI No. 18097) in 450t of hot water and stir the solution into 500v of 4% aqueous alginate thickener. Another 10 f of 5-nitrobenzenesulfonate is then added to the print paste formulation.

Using this printing paste, a mercerized cotton fabric is printed by roll printing and dried. Subsequently, the running web is heated to 1.40 °B of 600 °C water glass, 200 °C, using a liquid spray head rotating at 5000 revolutions per minute (rpm).
A solution consisting of 500 Be of caustic soda and 200 Be of cold water is used to spray at a treatment liquid absorption rate of 30%.

The fabric is steamed for 5 seconds in a flash steamer for dye fixation, and the print obtained is worked up and dried in the customary manner.

A straw-coloured print with good fastness properties is obtained.

Example 2 Dissolve 502 dye Reactive Yellow 129 in 458f hot water and then add this solution to 5-00f 4%
Stir in aqueous alginate thickener. 22 more monosodium phosphate and 10 t of sodium 6-nitrobenzenesulfonate are then added to the printing paste mixture.

A fabric made of regenerated cellulose fibers that has been caustic-treated using this printing paste is dyed with flat film printing and dried. Thereafter, the strips were made of 600-, 40°Bb waterglass and 400II as in Example IK.
A solution consisting of a caustic soda solution of I10.50°B6 is used to spray at a treatment liquid absorption rate of 35 degrees. After a short time of nearing, the belt-shaped fabric is picked up by a conveying device that runs continuously.
There, it is allowed to remain at room temperature for at least 15 minutes for dye adsorption. The fabric printed in this way is then worked up in the usual way and dried.

A yellow print with good fastness properties is obtained.

Example 5 80f dye Reactive Black 5 (C.I. No. 2
No. 0505) is dissolved in 408 t of hot water and the solution is stirred into 500 t of aqueous alginate thickener. Then 2 t of monosodium phosphate and 10 F of 5-nitrobenzenesulfone are added to the print paste formulation.

Using this printing paste, a mercerized cotton fabric is printed by roll printing and dried. The fabric was then processed as in Example 1 to 950w11. of 1.5 FfBe, water glass and 50
A solution consisting of caustic soda of f is sprayed at a treatment liquid absorption rate of 55To. After short nearing, the fabric is collected, covered with plastic foil and left at room temperature for 24 hours, during which time the reactive dyes are fixed. To complete the print, the fabric is then post-treated and dried in the usual manner.

A black print with good fastness properties is obtained.

Example 4 609 Dye Reactive Red 58 is dissolved in 4402 hot water and this solution is then placed in 500 f 4-thioaqueous alginate thickener, which already contains sodium 5-nitrobenzenesulfonate 209. Stir and boil.

A caustic-treated fabric made of regenerated cellulose fibers is printed using this printing paste by roll printing and dried. A continuously running strip of fabric was treated as in Example 1 using a solution consisting of 500ml of water, 30ml of water, 400ml of water and 100f of sodium bicarbonate at a treatment liquid absorption rate of 20%. Spray.

For dye fixation, the fabric is subsequently steam-heated in a suspended steamer for 8 minutes and then worked up and dried in the customary manner.

A red print with good fastness properties is obtained.

Example 5 602 of the dye Reactive Orange 12 was dissolved in 44 of hot water and the solution was then placed in 5 oars of a 4+% aqueous alginate thickener-containing 209 of sodium 5-nitrobenzenesulfonate. My eyes are closed.

Using this printing paste, a mixed fiber made of regenerated cellulose fibers is printed by roll printing and dried. The fabric strips are then sprayed according to the method of Example 1 with a solution consisting of 609ml of sodium carbonate, 640ml of water and 500ml of 5Ff'B#3 water glass at a treatment liquid absorption rate of 20%. For the fixation of the reactive dyes, the printed fabric is steam-heated for 6 minutes in a suspended steamer and finally worked up in the customary manner.

An orange print with good fastness properties is obtained.

Example 6 Made of polyester fiber/rayon stable (85
: 15) The mixed fabric is printed in roll printing using a printing paste prepared as follows: non-ion-forming dye Dysper Red 54:1 at 40F and dye Reactive Orange 16 (C.A.) at 40F. 17757) is first filtered or dissolved in 70 t of water (80-90 C) and then diluted with 150 f cold water.
Thickener - This is a copolymer consisting of a 60% aqueous solution of ammonium polyacrylate with a molecular weight of 0.6.10% and 60% of propylene and maleic anhydride with a molecular weight of 1.5.10% (molar ratio 1:1). Combined 2-chi aqueous solution 40
Stir in a mixture consisting of %.

After drying the strip of fabric printed in this way, the disperse dye is first fixed on the polyester portion of the fiber mixture by treatment with superheated steam for 7 minutes at 175 C in a suspended steamer. The fabric is then sprayed and finished as described in Example 2 for fixation of the reactive dye on the rayon staple component.

An orange print with good fastness properties is obtained.

Example 7 509 Dye Gisbar, Sprue 56 (C.I. No. 6
5285) in 270 tons of water (40-50C) using a rapid stirrer. Separately, dissolve 302 dye Reactive Blue 19 (CI No. 61200) in boiling water at 270F. Next, heat the mixture at 400f.
of cold water - this contains 4 t/f of wetting agent and 20 f/f of anti-migration agent.
/ Introduced into - containing L. Finally, the dye liquor prepared in this way is adjusted to a pH value of 5-6 with acetic acid.

This dye solution is used to dye polyester fibers/cotton (5
0:50) Buzz the mixed fabric with a dye liquor absorption rate of 60 cm and dry. Thereafter, the disperse dye is fixed on the polyester component by thermosol treatment with hot air at 200 C under tension for 60 seconds.

The cooled fabric was washed according to the method of Example 1 with 200d of 58 B6 water glass, 60-3.
A solution consisting of 8° Bb of caustic soda solution and 740° Bb of water was used to achieve a treatment liquid absorption rate of 60%.

The web is subsequently rolled, wrapped in a plastic film and left at room temperature for 8 hours, during which time the reactive dyes on the cotton parts of the fabric are fixed. The dyeing is then worked up in a customary manner and dried for finishing.

A blue dyeing with good fastness on both edge m components is obtained.

Claims (1)

[Scope of Claims] 1. Rotary liquid spraying on a web-like textile fabric consisting of partially fixed, previously printed or dyed with reactive dyes and optionally dried cellulose fibers or a mixture of such fibers and polyester fibers. In a method of continuously applying liquid formulations by spraying with a head, such formulations are
A process as described above, characterized in that the textile fabric is sprayed via a rotor running at a rotational speed of 000 to 7000 rpm and having a spray width of 5 to 20 cm per rotor. i A highly viscous solution based on soda water glass as a liquid formulation - this has a density of 57-50B''f3 or 1.54
2. A process as claimed in claim 1, in which a specific gravity of 1.55 to 1.55 is used, optionally mixed with further alkalis. 5. The method according to claim 1 or 2, wherein fixing of printing or padding dyeing by spraying is carried out within a time period of 5 seconds to 24 hours depending on the strength of the alkali added to the soda water glass.