Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
  • D06B19/00—Treatment of textile materials by liquids, gases or vapours, not provided for in groups D06B1/00 - D06B17/00
  • D06B19/0005—Fixing of chemicals, e.g. dyestuffs, on textile materials
  • D06B19/0064—Fixing of chemicals, e.g. dyestuffs, on textile materials by a fixing bath
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
  • D06B19/00—Treatment of textile materials by liquids, gases or vapours, not provided for in groups D06B1/00 - D06B17/00
  • D06B19/0088—Treatment of textile materials by liquids, gases or vapours, not provided for in groups D06B1/00 - D06B17/00 using a short bath ratio liquor
  • D06B19/0094—Treatment of textile materials by liquids, gases or vapours, not provided for in groups D06B1/00 - D06B17/00 using a short bath ratio liquor as a foam

Definitions

• the present invention relates to the continuous fixation of prints and block dyeing with reactive dyes on textile webs of cellulose fibers or their blends with synthetic fibers, preferably with polyester fibers, according to a two-phase steaming technique, the dissolved alkaline fixing agent in the form of minimal liquor quantities on the unfixed , is previously applied with the reactive dyes without alkali added or block-dyed and optionally dried fiber material.
• the fixation of prints or block dyeing with reactive dyes on fabrics made of cellulose fibers is carried out in practice according to a one- or two-stage procedure. All two-stage methods of this type have in common that the printing paste or pad liquor containing the dye is prepared without the addition of alkali and thus acts on the textile material. Only in a second operation is an alkali solution then applied to the goods printed or padded under neutral or weakly acidic conditions, which may be intermediate dried, which is required for the subsequent fixing of the dye on the fiber. As a rule, this chemical solution is applied on a padder with two or more rollers, the pretreated textile material absorbing 60-100% (based on the weight of the dry fiber material) of the fixing liquor.
• a minimal application unit can also be used for treatment with the fixative.
• the goods are then briefly steamed at 110-140 ° C for 5-30 seconds.
• Sodium hydroxide solution of 32.5% (38 ° Be) in a concentration of 70-120 ml per liter of padding liquor is mainly used as an alkaline agent for fixing the reactive dyes in the second treatment stage in the previously known two-phase padding steaming process.
• Water glass of 38 ° Be in amounts of 50-100 ml / 1 is only added to this fixing liquor to increase the viscosity thereof and to achieve a uniform film on the fixing alkali on the application rollers.
• the object of the invention is thus achieved by using liquid preparations of the alkaline fixing agent in the form of a thickened aqueous solution or in the foamed state thereof as the fixing liquors, and the impregnation process to cover the form or the pre-block with this fixing liquor by means of a uniform application of small amounts of liquid (Minimum order) effecting application measure and that the subsequent heat fixation of the prints or block dyeing on the textile material treated in this way is brought about by long-term steaming in a hanging loop damper.
• liquid preparations of the alkaline fixing agent in the form of a thickened aqueous solution or in the foamed state thereof as the fixing liquors
• the principle of the present invention is based on the finding and the practice-oriented implementation of special guidelines for optimal process conditions.
• the previously unknown combination of the use of minimal application systems for padding over or splashing over the fixing liquids or foams on the alkali-free form or padding with the reactive dyes together with the subsequent dye fixation in a hanging loop damper according to the present invention succeeds at the beginning to get the problems outlined in the course of the two-phase application of reactive dyes with low fixing speed.
• the composition of the alkaline fixing liquor in the claimed process is naturally very different from the recipe in this regard in the case of conventional two-phase short steaming processes.
• the consistency of the fixing liquors sought in accordance with the invention can be adjusted by adding the aqueous solutions provided for this purpose in addition to alkalis and sodium water glasses, thickeners such as e.g. Alginates, starch or guar derivatives, carboxymethyl celluloses, etc., or electrolytes.
• Soda water glass is also advantageously considered on its own as the actual agent for fixing the dyes and is not only recommended as an aid for increasing the viscosity of the fixing liquor and for achieving a uniform film on the fixing alkali on the application rollers.
• the liquid preparations contain aqueous solutions based on soda water glasses, which have a degree of flatness of 37-50 ° Be or a specific weight of 1.34 to 1.53.
• soda water glass is used either alone in a concentration of 200-400 ml per liter of padding liquor or in a mixture with other alkalis, in which case, for example, 100 ml of soda water glass of 38 ° B6 and 10-50 g or ml of soda, potash or caustic soda from 38 ° B6 works.
• the sodium hydroxide solution is buffered by the water glass present in the course of the two-phase long-steaming process to such an extent that quantities in the range from 20-100 are not influenced on the stability of the color tones ml of caustic soda of 38 ° Be can add 100 ml of soda water glass of 38 ° Be to the stock.
• This finding is of particular interest for practical purposes in the case of the production of olive tones that are made up of a large amount of yellow and a small proportion of black (see example 2).
• the minimal application of the fixing liquor takes place with the aid of machine application and metering systems, in which the chemical solution is finely distributed on the uniformly passing fiber material in a coherent layer which is applied or coated over the surfaces previously printed or padded with the dyes. is foamed.
• the equipment requirements for a minimum order with this orientation are met, for example, by rollers, doctor blades, foam chambers or gear wheels.
• the minimal fixing agent application can be carried out by means of measures based on the functional principle or the action of rollers and / or doctor blades.
• roller application systems with pinch joints are suitable for this, including Rubber or steel rollers, magnetic doctor blades with or without metering device, doctor blades or circular stencils.
• Paddle rollers to which a scraper is pressed are also suitable.
• the foams can be applied according to the method claimed by the invention using various technologies.
• the foam can either be by doctoring, squeezing, sucking through, indirect doctoring, padding as well as by means of slot nozzles, rotary stencils, foam chambers or according to the principle of a gear pump by speed-controllable gear wheels on the textile material.
• the amount of fixing solution applied is 20-50%, preferably 25-40%, based on the weight of the goods.
• the steaming time in the hanging loop damper is 2-12 minutes, preferably 3-7 minutes at 105-140 ° C.
• the method according to the present invention is intended for the fixation of prints and block dyeing with reactive dyes on sheet-like cellulose fiber materials of natural or regenerated origin and their mixtures with synthetic fibers in all processing stages, such as woven, knitted or nonwoven fabrics.
• the following examples serve to illustrate the invention.
• the percentages given therein are percentages by weight and, in the case of the data for the liquor intake, are based on the weight of the dry goods.
• the water glasses according to the examples are each soda water glass.
• This printing paste is used to print and dry a knitted fabric made of non-leached cellulose in rouleaux printing.
• the alkali-free form produced in this way is then subjected to an alkali solution made of 300 ml water glass of 38 ° Be per liter of water (liquor absorption 20%) on a metering knife pad (e.g. foulard with a metering knife of 20/100 mm engraving depth) and immediately thereafter for dye fixation subjected to saturated steam treatment at 105 ° C in a hanging loop steamer for 8 min.
• the printing stain produced is rinsed cold with water, soaped and dried as usual.
• This printing paste is used to print and dry a fabric made from non-leached cellulose in Rouleaux printing.
• a fixative solution consisting of 100 ml water glass of 38 ° Be, 20 ml sodium hydroxide solution of 38 ° B6 and 880 ml water with a liquor absorption of 30% is then placed on the alkali-free pre-pressure created in the above manner by means of a squeegee roller to which a wiper is pressed. applied and the thus over-clad goods are subsequently exposed to the action of superheated steam in a hanging loop damper at 120 ° C. for 6 minutes. Finally, the patterned goods are post-processed as usual.
• the amount of sodium hydroxide solution can be tripled or quintupled without changing the color of the pattern produced.
• padding liquors of the fixing chemicals without the addition of water glass however, each time the sodium hydroxide solution concentration on the textile is changed, a different shade is obtained.
• This printing paste is used to print and dry a knitted fabric made from non-leached, modified regenerated cellulose fibers on a rotary film printing machine.
• an aqueous, 3% foam is produced which contains 100 ml of 38 ° Be water glass, 30 g soda and 2 g of a surfactant mixture of alkenesulfonates and hydroxyalkanesulfonates in a ratio of 1: 1 per liter of the underlying aqueous liquor (liquid fraction).
• This foam of the alkaline fixing agent is then by means of a foam distribution and application chamber, as described in German patent DE-C-25 23 062, in an amount corresponding to a liquor absorption of 25% on the previously generated alkali-free form in the form of a uniform thick layer applied.
• the dye thus applied is then fixed in a hanging loop damper in the course of a steam treatment of 3 minutes at 130 ° C. and the printed textile material is post-treated as usual.
• a deep red is obtained with good fastness properties.
• This printing paste is then used to print and dry a fabric made from leached cellulose in rotary film printing.
• a 6% foam is produced which contains 150 ml water glass of 38 ° Be, 30 ml sodium hydroxide solution of 38 ° Be, 2 g of a surfactant mixture of approximately equal proportions of alkene sulfonates and hydroxyalkane sulfonates and as a foam stabilizer, small amounts of a fatty alcohol per liter of aqueous liquor , contains for example lauryl alcohol.
• This printing paste is used to print and dry a fabric made of non-leached cellulose in rouleaux printing. Thereafter, the goods pre-printed in this way are padded with an alkaline fixing solution as described in Example 1, steamed for dye fixation and finally finished.
• a blended fabric made of polyester fiber / cotton (50:50) with a liquor absorption of 60% is padded and dried.
• the disperse dye is then fixed to the polyester component for 60 seconds by thermosoling on the stenter using hot air at 200 ° C.
• the cooled goods are then padded, steamed and, as usual, aftertreated and dried in accordance with the instructions of Example 5 to fix the reactive dye with the alkaline liquor specified therein.
• a blue color is obtained on both fiber components with good fastness properties.
• This printing paste is now used to print a fabric made of mercerized cotton on a Rouleaux printing machine and dried.
• an aqueous, 10% foam of the alkaline fixative (1 1 foam weighs 100 g) is produced, which calculates 30 g of soda per kg of the underlying aqueous liquor fraction (before foaming), 100 g of table salt, 200 g of a 5% , aqueous solution of a thickener based on a guar derivative (or another type customary in textile printing) and 5 g of a surfactant mixture of alkenesulfonates and hydroxyalkanesulfonates in a ratio of 1: 1.
• the foamed fixative is then applied to the previously produced print with the alkali-free dye preparation using a perforated rotary stencil, the weight of which corresponds to a liquor absorption of 30%.
• the goods treated in this way are subjected to the effect of steam at 110 ° C. in a hanging loop damper for 6 minutes in order to bring about the dye fixation and are subsequently treated in a conventional manner.
• a deep red is obtained with good fastness properties.
• a brilliant yellow is obtained with good fastness properties.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Coloring (AREA)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

Country Status (3)

Cited By (2)

Citations (4)

• 1984
  • 1984-12-20 DE DE19843446421 patent/DE3446421A1/de not_active Withdrawn
• 1985
  • 1985-12-09 EP EP85115642A patent/EP0186814A1/fr not_active Withdrawn
  • 1985-12-19 JP JP60284500A patent/JPS61152886A/ja active Pending

Patent Citations (4)

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