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EP0526400B1 - Process for fixation of reactive dye stuffs on cellulose containing textile material - Google Patents

Process for fixation of reactive dye stuffs on cellulose containing textile material Download PDF

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Publication number
EP0526400B1
EP0526400B1 EP92810557A EP92810557A EP0526400B1 EP 0526400 B1 EP0526400 B1 EP 0526400B1 EP 92810557 A EP92810557 A EP 92810557A EP 92810557 A EP92810557 A EP 92810557A EP 0526400 B1 EP0526400 B1 EP 0526400B1
Authority
EP
European Patent Office
Prior art keywords
process according
water
heat
fixing
impermeable material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP92810557A
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German (de)
French (fr)
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EP0526400A1 (en
Inventor
Wolfgang Brehme
Rolf Hopf
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BASF Schweiz AG
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Ciba Geigy AG
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Publication of EP0526400A1 publication Critical patent/EP0526400A1/en
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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P3/00—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
    • D06P3/58—Material containing hydroxyl groups
    • D06P3/60—Natural or regenerated cellulose
    • D06P3/66—Natural or regenerated cellulose using reactive dyes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S8/00—Bleaching and dyeing; fluid treatment and chemical modification of textiles and fibers
    • Y10S8/916—Natural fiber dyeing
    • Y10S8/918—Cellulose textile

Definitions

  • the present invention relates to a method for fixing reactive dyes on cellulose-containing textile material.
  • urea For the printing of cellulose-containing textile goods with reactive dyes, considerable amounts of nitrogen-containing compounds, in particular urea, are usually used as a solvent.
  • the urea is particularly responsible for adequate fixation of the reactive dyes used.
  • urea is an essential load factor in the waste water due to its nitrogenous degradation products.
  • the printed fiber material fixed by the present method represents a further subject of the invention.
  • the dyes used in the process according to the invention are the reactive dyes usually used for dyeing or printing cellulose textile materials.
  • Reactive dyes are per se known dyes which form a chemical bond with the cellulose, e.g. the "Reactive Dyes” listed in Coulor Index in volume 3 (3rd edition, 1971) on pages 2391-3560 and in volume 6 (revised edition, 1975) on pages 6268-6345.
  • Reactive dyes which are particularly suitable for the present process are those which contain a monohalotriazine group.
  • the monohalotriazine group is a monofluorine, monobromine or preferably a monochlorotriazine group.
  • reactive dyes which have one or more vinyl sulfone groups as the reactive group.
  • the amount of the dyes generally depends on the desired color strength and is expediently 0.1 to 300 g / kg of printing ink, advantageously 0.1 to 100 and preferably 5 to 60 g / kg of printing ink.
  • the printing inks contain fixing alkalis.
  • alkaline compounds for fixing the reactive dyes are sodium carbonate, sodium bicarbonate, sodium hydroxide, disodium phosphate, trisodium phosphate, borax, aqueous ammonia or alkali donors, such as e.g. Sodium trichloroacetate or sodium formate used.
  • a mixture of water glass and a 25% aqueous sodium carbonate solution can also be used as the alkali.
  • the pH of the printing inks containing alkali is usually 7.5 to 13.2, preferably 8.5 to 11.5.
  • the aqueous printing pastes used for the process according to the invention also contain thickeners, preferably of natural origin, in particular sodium alginate alone or in a mixture with modified cellulose, in particular with at most 20 to 25 percent by weight of carboxymethyl cellulose.
  • the printing pastes can also contain preservatives, sequestering agents, emulsifiers, water-insoluble solvents, oxidizing agents and deaerating agents.
  • the method according to the invention is suitable for fixing dyes on textile fiber materials which consist of or contain cellulose.
  • these are mainly sheet-like textile materials, such as Fleeces, felts, carpets, knitted fabrics and in particular fabrics.
  • the process according to the invention is suitable for fiber materials which may have been pretreated with sodium hydroxide solution, preferably for cellulose material and regenerated cellulose, such as Viscose cellulose.
  • the printing paste is applied over the entire surface or in places directly to the fiber material
  • printing machines of a conventional type e.g. Gravure printing, rotary screen printing and flat film printing machines can be used appropriately.
  • the fiber material is dried at temperatures up to 150 ° C., preferably 80 ° to 120 ° C.
  • the fiber material is evenly wetted with water on its top, back or on both sides.
  • the water can be wetted in various ways, for example by direct or indirect application methods.
  • the fiber material can be moistened directly by, for example, spraying on using a commercially available atomizer, by roller systems, stencils or by applying water in the form of foam or by so-called rotor dampening, the principle of which is described in detail in Textilpraxis Internarional, 111a (1987).
  • the application amounts of water are between 5 and 50%, preferably between 10 and 40%, based on the printed, dry fiber material.
  • the water used for wetting can be specially prepared by ion exchange resins or distillation. If desired, wetting or thickening agents can be added to the water.
  • the water can also contain alkali.
  • the printed and moistened fiber material is then subjected to a heat treatment according to claim 1 for fixing.
  • the fixing method according to the invention can be carried out continuously or discontinuously.
  • the fiber material as a rule a fabric web, can be sandwiched by a water-impermeable material from both sides and thus supplied to the heat treatment, or the fiber material lies on one side on a water-impermeable heating element and is on the side facing away from the heating element covered with a waterproof material.
  • the heating element serves as a one-sided - or in the case of a press, if desired, a two-sided - barrier for the water vapor.
  • the fiber material is enclosed in a water and vapor tight manner for the duration of the heat setting.
  • the top and bottom are covered with a water- and vapor-tight barrier layer.
  • Thin, heat-resistant and sublimation-resistant films come into consideration as water-vapor-tight material, which do not undergo any chemical reaction to the fiber material and the printing paste applied to it, as well as the dampening liquor. These foils are used to seal the printed fiber material tightly and thus prevent the water vapor from evaporating. Various materials can be considered. Polyester films are preferably used for the process according to the invention. Flat structures made of Teflon, metal or heat-resistant rubber can also be used to enclose the fiber material.
  • the heat treatment is carried out continuously on a suitably modified calender or in a heated tunnel or discontinuously in a heated closed room or on a press, for example a transfer ironing press, for about 30 seconds to 20 minutes, preferably 5 to 10 minutes, with a contact pressure of about 0 , 2 to 2 bar.
  • the fixing temperature is between 90 and 150 ° C, preferably between 100 and 110 ° C.
  • the cellulose-containing textile material is then washed out in the customary manner in order to remove unfixed dye.
  • the substrate is treated with water, preferably soft water, for example at from 20 ° C. to the cooking temperature.
  • the fiber material is dried in the usual way.
  • the heat required for the fixation can be supplied as contact, ambient or radiant heat to the fiber.
  • Fixing by means of contact heat can be carried out in a simple manner by using devices that are already available in the textile operation for the continuous or discontinuous fixing process.
  • the heat required for the fixation can be transferred as contact heat using a calender.
  • the fiber material Before contact with the calender, the fiber material is covered on one or both sides with the water-impermeable film and passed over the calender. If the fiber material is covered on one side with the film, the surface of the calender serves as a second barrier layer.
  • a water-impermeable endless belt is placed or pressed onto the calender and the fiber material to be fixed is drawn in between this belt and the calender.
  • the heat required for the fixation can be transferred as contact heat by means of a press, such as a transfer ironing press. No or only slight modifications of the press are necessary to carry out the method according to the invention.
  • the fiber material Before fixing, the fiber material can be sandwiched on both sides, covered with the waterproof film and then into the Press. However, it is also possible to equip one or both contact surfaces of the press with water-impermeable material and thus to carry out the fixing method according to the invention.
  • the fiber material either has to be covered on one side only with the water-impermeable film or, if the press is water-impermeable on both sides, the appropriately moistened fiber material can also be inserted directly into the press.
  • the heat required for the fixing process according to the invention can also be supplied as ambient heat.
  • the waterproof, enclosed fiber material can be guided through a heated tunnel or enclosed in a heated room for the time required for fixing.
  • the waterproof fixing of the fiber material enclosed in a watertight manner is also possible by means of radiation energy (infrared radiation, UV radiation or by means of microwaves).
  • the watertight enclosed fiber material is either passed continuously through a tunnel heated by means of steel energy or intermittently enclosed in a room heated by means of steel energy during the time required for fixing.
  • Example 1 A four-color pattern is printed on a bleached, mercerized cotton fabric.
  • the resulting pattern-like print is dried for 2 minutes at 120 ° C.
  • the pressure on the back is applied with 12% water, based on the weight of the fiber material, using a minimal application device.
  • the moistened product is sandwiched between two polyester films and treated for 8 minutes at 105 ° C on an ironing press for fixing.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Coloring (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Abstract

The present invention relates to a process for fixation of reactive dyestuffs on cellulose-containing textile material and equipment for carrying out this process. <??>The process according to the invention is characterised in that the dried fibre material printed with reactive dyes is moistened with water and surrounded by a water-impermeable material and fixed by the action of heat. The fixing process according to the invention can advantageously be carried out using small amounts of urea, preferably without urea, with good print quality.

Description

Die vorliegende Erfindung betrifft ein Verfahren zum Fixieren von Reaktivfarbstoffen auf cellulosehaltigem Textilgut.The present invention relates to a method for fixing reactive dyes on cellulose-containing textile material.

Zum Bedrucken von cellulosehaltigem Textilgut mit Reaktivfarbstoffen werden gewöhnlich erhebliche Mengen an stickstoffhaltigen Verbindungen, insbesondere Harnstoff als Lösungsremittler verwendet. Der Harnstoff ist dabei besonders für eine ausreichende Fixierung der eingesetzten Reaktivfarbstoffe mitverantwortlich. Neben diesen für den Druck- und Fixierprozess mit Reaktivfarbstoffen sehr günstigen Eigenschaften stellt Harnstoff jedoch wegen seiner stickstoffhaltigen Abbauprodukte einen wesentlichen Lastfaktor in den Abwässern dar.For the printing of cellulose-containing textile goods with reactive dyes, considerable amounts of nitrogen-containing compounds, in particular urea, are usually used as a solvent. The urea is particularly responsible for adequate fixation of the reactive dyes used. In addition to these properties, which are very favorable for the printing and fixing process with reactive dyes, urea is an essential load factor in the waste water due to its nitrogenous degradation products.

Es hat daher nicht an Versuchen gefehlt, den Harnstoff zu reduzieren bzw. ganz zu eliminieren, z.B indem man die bedruckte Ware vor dem Fixierprozess mit Wasser befeuchtet und anschliessend mit Wasserdampf fixiert. Mit diesem Verfahren können aber nur dann befriedigende Resultate erzielt werden, wenn die Feuchtigkeitszufuhr so dosiert werden kann, dass das Feuchtigkeitsgleichgewicht Wasserdampf/Faser möglichst nahe beim Maximum des Feuchtigkeitsgehaltes der jeweiligen Faser liegt und dieser Maximalwert während des Fixierprozesses möglichst konstant gehalten werden kann. In der Praxis erweist sich die Einstellung der optimalen Feuchtigkeit während des Fixierns als schwer steuerbarer Prozess.There has been no shortage of attempts to reduce the urea or eliminate it entirely, e.g. by moistening the printed goods with water before the fixing process and then fixing them with steam. Satisfactory results can only be achieved with this method if the moisture supply can be dosed so that the moisture balance of water vapor / fiber is as close as possible to the maximum of the moisture content of the respective fiber and this maximum value can be kept as constant as possible during the fixing process. In practice, setting the optimal moisture level during fixation proves to be a difficult process to control.

Es wurde nun ein einfaches Verfahren gefunden, das es ermöglicht, den Feuchtigkeitsgehalt der bedruckten Ware maximal und konstant zu halten, indem man die bedruckte Ware mit Wasser befeuchtet und die nachfolgende Fixierung ohne Lösungsremittler so gestaltet, dass das Fasermaterial dampfdicht umschlossen wird.A simple process has now been found which makes it possible to keep the moisture content of the printed goods to a maximum and constant by moistening the printed goods with water and designing the subsequent fixing without a solvent so that the fiber material is enclosed in a vapor-tight manner.

Gegegenstand der vorliegenden Erfindung ist daher ein Verfahren zum Fixieren von Reaktivfarbstoffen auf cellulosehaltigem Textilgut, das dadurch gekennzeichnet ist, dass man

  • a) das mit Fixieralkalien enthaltenden Druckpasten bedruckte, getrocknete Fasermaterial mit Wasser befeuchtet,
  • b) das Fasermaterial mit einem wasserundurchlässigen Material umschliesst und
  • c) das umschlossene Fasermaterial zur Fixierung einer Hitzebehandlung unterzieht, wobei die Fixierung ohne Gegenwart von Lösungsvermittlern erfolgt.
The object of the present invention is therefore a method for fixing reactive dyes on cellulose-containing textile material, which is characterized in that
  • a) the dried fiber material printed with fixing pastes containing fixing alkali is moistened with water,
  • b) encloses the fiber material with a waterproof material and
  • c) the enclosed fiber material is subjected to heat treatment for fixation, the fixation taking place without the presence of solubilizers.

Aus der EP-A-416,888 ist ein Verfahren bekannt, worin undurchlässige Materialien verwendet werden. Diese Materialien werden jedoch nicht zur Fixierung der Farbstoffe verwendet.From EP-A-416,888 a method is known in which impermeable materials are used. However, these materials are not used to fix the dyes.

Das bedruckte und nach dem vorliegenden Verfahren fixierte Fasermaterial stellt einen weiteren Erfindungsgegenstand dar.The printed fiber material fixed by the present method represents a further subject of the invention.

Bei den im erfindungsgemässen Verfahren eingesetzten Farbstoffen handelt es sich um die üblicherweise zum Färben oder Bedrucken von Cellulose-Textilmaterialien verwendeten Reaktivfarbstoffe.The dyes used in the process according to the invention are the reactive dyes usually used for dyeing or printing cellulose textile materials.

Unter Reaktivfarbstoffen werden an sich bekannte Farbstoffe verstanden, welche mit der Cellulose eine chemische Bindung eingehen, z.B. die in Coulor Index in Band 3 (3. Auflage, 1971) auf den Seiten 2391-3560 und in Band 6 (revidierte Auflage, 1975) auf den Seiten 6268-6345 aufgeführten "Reactive Dyes". Für das vorliegende Verfahren besonders geeignete Reaktivfarbstoffe sind solche, die eine Monohalogentriazingruppe enthalten. Bei der Monohalogentriazingruppe handelt es sich dabei um eine Monofluor-, Monobrom- oder vorzugsweise um eine Monochlortriazingruppe.Reactive dyes are per se known dyes which form a chemical bond with the cellulose, e.g. the "Reactive Dyes" listed in Coulor Index in volume 3 (3rd edition, 1971) on pages 2391-3560 and in volume 6 (revised edition, 1975) on pages 6268-6345. Reactive dyes which are particularly suitable for the present process are those which contain a monohalotriazine group. The monohalotriazine group is a monofluorine, monobromine or preferably a monochlorotriazine group.

Weiterhin bevorzugt sind Reaktivfarbstoffe, die als Reaktivgruppe eine oder mehrere Vinylsulfongruppen aufweisen.Also preferred are reactive dyes which have one or more vinyl sulfone groups as the reactive group.

Die Menge der Farbstoffe richtet sich in der Regel nach der gewünschten Farbstärke und beträgt zweckmässig 0,1 bis 300 g/kg Druckfarbe, vorteilhafterweise 0,1 bis 100 und vorzugsweise 5 bis 60 g/kg Druckfarbe.The amount of the dyes generally depends on the desired color strength and is expediently 0.1 to 300 g / kg of printing ink, advantageously 0.1 to 100 and preferably 5 to 60 g / kg of printing ink.

Neben den Reaktivfarbstoffen enthalten die Druckfarben Fixieralkalien. Als alkalisch reagierende Verbindungen zur Fixierung der Reaktivfarbstoffe werden beispielsweise Natriumcarbonat, Natriumbicarbonat, Natriumhydroxid, Dinatriumphosphat, Trinatriumphosphat, Borax, wässriges Ammoniak oder Alkalispender, wie z.B. Natriumtrichloracetat oder Natriumformiat eingesetzt. Als Alkali kann auch eine Mischung aus Wasserglas und einer 25 %igen wässrigen Natriumcarbonatlösung verwendet werden.In addition to the reactive dyes, the printing inks contain fixing alkalis. Examples of alkaline compounds for fixing the reactive dyes are sodium carbonate, sodium bicarbonate, sodium hydroxide, disodium phosphate, trisodium phosphate, borax, aqueous ammonia or alkali donors, such as e.g. Sodium trichloroacetate or sodium formate used. A mixture of water glass and a 25% aqueous sodium carbonate solution can also be used as the alkali.

Der pH-Wert der Alkali enthaltenden Druckfarben beträgt in der Regel 7,5 bis 13,2, vorzugsweise 8,5 bis 11,5.The pH of the printing inks containing alkali is usually 7.5 to 13.2, preferably 8.5 to 11.5.

Die für das erfindungsgemässe Verfahren verwendeten wässrigen Druckpasten enthalten neben den Farbstoffen und Fixieralkalien ferner Verdickungsmittel, vorzugsweise natürlicher Herkunft, insbesondere Natriumalginat für sich allein oder im Gemisch mit modifizierter Cellulose, insbesondere mit höchstens 20 bis 25 Gewichtsprozent Carboxymethylcellulose. Gewünschtenfalls können die Druckpasten noch Konservierungsmittel, Sequestriermittel, Emulgatoren, wasserunlösliche Lösungsmittel, Oxidarionsmittel und Entlüftungsmittel enthalten.In addition to the dyes and fixing alkalis, the aqueous printing pastes used for the process according to the invention also contain thickeners, preferably of natural origin, in particular sodium alginate alone or in a mixture with modified cellulose, in particular with at most 20 to 25 percent by weight of carboxymethyl cellulose. If desired, the printing pastes can also contain preservatives, sequestering agents, emulsifiers, water-insoluble solvents, oxidizing agents and deaerating agents.

Das erfindungsgemässe Verfahren eignet sich für das Fixieren von Farbstoffen auf textilen Fasermaterialien, die aus Cellulose bestehen oder diese enthalten. Es handelt sich dabei in der Regel vor allem um flächenförmige Textilmaterialien, wie z.B. Vliese, Filze, Teppiche, Gewirke und insbesondere Gewebe. Das erfindungsgemässe Verfahren ist geeignet für Fasermaterialien, die gegebenenfalls mit Natronlauge vorbehandelt sind, vorzugsweise für Cellulose-Material und Regenerat-Cellulose, wie z.B. Viskose-Cellulose.The method according to the invention is suitable for fixing dyes on textile fiber materials which consist of or contain cellulose. As a rule, these are mainly sheet-like textile materials, such as Fleeces, felts, carpets, knitted fabrics and in particular fabrics. The process according to the invention is suitable for fiber materials which may have been pretreated with sodium hydroxide solution, preferably for cellulose material and regenerated cellulose, such as Viscose cellulose.

Beim Bedrucken der Fasermaterialien wird die Druckpaste ganzflächig oder stellenweise direkt auf das Fasermaterial aufgebracht, wobei Druckmaschinen üblicher Bauart, z.B. Tiefdruck-, Rotationssiebdruck- und Flachfilmdruckmaschinen zweckmässig eingesetzt werden.When printing on the fiber materials, the printing paste is applied over the entire surface or in places directly to the fiber material, printing machines of a conventional type, e.g. Gravure printing, rotary screen printing and flat film printing machines can be used appropriately.

Das Fasermaterial wird nach dem Bedrucken bei Temperaturen bis 150°C, vorzugsweise 80° bis 120°C getrocknet. Vor der Fixierung der Farbstoffe wird das Fasermaterial auf seiner Oberseite, Rückseite oder beidseitig gleichmässig mit Wasser benetzt. Die Wasserbenetzung kann dabei auf verschiedene Weisen erfolgen, beispielsweise durch direkte oder indirekte Auftragsmethoden. Direkt kann die Befeuchtung des Fasermaterials durch beispielsweise Aufsprühen mittels eines handelsüblichen Zerstäubers, durch Walzensysteme, Schablonen oder Auftrag von Wasser in Form von Schaum oder durch die sogenannte Rotorenfeuchtung erfolgen, deren Funktionsprinzip in Textilpraxis Internarional, 111a (1987) ausführlich beschrieben ist. Die Auftragsmengen an Wasser liegen dabei zwischen 5 und 50 %, vorzugsweise zwischen 10 und 40 %, bezogen auf das bedruckte, trockene Fasermaterial.After printing, the fiber material is dried at temperatures up to 150 ° C., preferably 80 ° to 120 ° C. Before the dyes are fixed, the fiber material is evenly wetted with water on its top, back or on both sides. The water can be wetted in various ways, for example by direct or indirect application methods. The fiber material can be moistened directly by, for example, spraying on using a commercially available atomizer, by roller systems, stencils or by applying water in the form of foam or by so-called rotor dampening, the principle of which is described in detail in Textilpraxis Internarional, 111a (1987). The application amounts of water are between 5 and 50%, preferably between 10 and 40%, based on the printed, dry fiber material.

Das zur Benetzung verwendete Wasser kann durch Ionenaustauscherharze oder Destillation besonders aufbereitet sein. Dem Wasser können gewünschtenfalls Netz- oder Verdickungsmittel zugesetzt sein. Darüber hinaus kann das Wasser auch Alkali enthalten.The water used for wetting can be specially prepared by ion exchange resins or distillation. If desired, wetting or thickening agents can be added to the water. The water can also contain alkali.

Im Anschluss daran wird das bedruckte und befeuchtete Fasermaterial zur Fixierung einer Hitzebehandlung nach Anspruch 1 unterzogen.The printed and moistened fiber material is then subjected to a heat treatment according to claim 1 for fixing.

Das erfindungsgemässe Fixierverfahren kann kontinuierlich oder diskontiniuerlich durchgeführt werden. Dabei kann das Fasermaterial, im Regelfall eine Stoffbahn, sandwichartig von beiden Seiten von einem wasserundurchlässigen Material eingeschlossen sein und so der Hitzebehandlung zugeführt werden, oder das Fasermatierial liegt mit der einen Seite auf einem wasserundurchlässigen Heizelement auf und wird auf der von dem Heizelement abgewandten Seite von einem wasserundurchlässigen Material abgedeckt. Im letzteren Fall dient das Heizelement als einseitige - oder im Falle einer Presse gewünschtenfalls auch als zweiseitige - Sperre für den Wasserdampf.The fixing method according to the invention can be carried out continuously or discontinuously. The fiber material, as a rule a fabric web, can be sandwiched by a water-impermeable material from both sides and thus supplied to the heat treatment, or the fiber material lies on one side on a water-impermeable heating element and is on the side facing away from the heating element covered with a waterproof material. In the latter case, the heating element serves as a one-sided - or in the case of a press, if desired, a two-sided - barrier for the water vapor.

Wesentlich ist, dass das Fasermaterial für die Dauer der Thermofixierung wasser- und dampfdicht eingeschlossen ist. Bei flächigem Fasermaterial ist es dabei ausreichend, wenn die Unter- und Oberseite mit einer wasser- und dampfdichten Sperrschicht abgedeckt ist.It is essential that the fiber material is enclosed in a water and vapor tight manner for the duration of the heat setting. In the case of flat fiber material, it is sufficient if the top and bottom are covered with a water- and vapor-tight barrier layer.

Als wasserdampfdichtes Material kommen dünne, hitze- und sublimationsbeständige Folien in Betracht, die gegenüber dem Fasermaterial und der darauf aufgebrachten Druckpaste sowie der Befeuchtungsflotte keine chemische Reaktion eingehen. Diese Folien dienen dazu, das bedruckte Fasermaterial dicht abzuschliessen und somit eine Verflüchtigung des Wasserdampfes zu vermeinden. Es kommen dafür verschiedene Materialien in Betracht. Bevorzugt werden für das erfindungsgemässe Verfahren Polyesterfolien eingesetzt. Zum Einschluss des Fasermaterials können ebenfalls flächige Gebilde aus Teflon, Metall oder hitzebeständigem Gummi verwendet werden.Thin, heat-resistant and sublimation-resistant films come into consideration as water-vapor-tight material, which do not undergo any chemical reaction to the fiber material and the printing paste applied to it, as well as the dampening liquor. These foils are used to seal the printed fiber material tightly and thus prevent the water vapor from evaporating. Various materials can be considered. Polyester films are preferably used for the process according to the invention. Flat structures made of Teflon, metal or heat-resistant rubber can also be used to enclose the fiber material.

Die Hitzebehandlung erfolgt kontinuierlich auf einem entsprechend modifizierten Kalander oder in einem geheizten Tunnel oder diskontinuierlich in einem geheizten abgeschlossenen Raum oder auf einer Presse, z.B. einer Transferbügelpresse während etwa 30 Sek. bis 20 Min., vorzugsweise 5 bis 10 Minuten bei einem Anpressdruck von etwa 0,2 bis 2 bar. Die Fixiertemperatur liegt dabei zwischen 90 und 150°C, vorzugswiese zwischen 100 und 110°C.The heat treatment is carried out continuously on a suitably modified calender or in a heated tunnel or discontinuously in a heated closed room or on a press, for example a transfer ironing press, for about 30 seconds to 20 minutes, preferably 5 to 10 minutes, with a contact pressure of about 0 , 2 to 2 bar. The fixing temperature is between 90 and 150 ° C, preferably between 100 and 110 ° C.

Im Anschluss daran wird das cellulosehaltige Textilgut in üblicher Weise ausgewaschen, um nichtfixierten Farbstoff zu entfernen. Man behandelt dazu das Substrat beispielsweise bei 20°C bis Kochtemperatur mit Wasser, vorzugsweise Weichwasser. Abschliessend wird das Fasermaterial auf übliche Weise getrocknet.The cellulose-containing textile material is then washed out in the customary manner in order to remove unfixed dye. For this purpose, the substrate is treated with water, preferably soft water, for example at from 20 ° C. to the cooking temperature. Finally, the fiber material is dried in the usual way.

Man erhält nach dem erfindungsgemässen Verfahren egale und farbkräftige Drucke, die bei gleicher Druckqualität völlig ohne Harnstoff durchgeführt werden.In the process according to the invention, level and vivid prints are obtained, which are carried out completely without urea with the same print quality.

Die für die Fixierung erforderlichen Wärme kann als Kontakt-, Umgebungs- oder Strahlungswärme der Faser zugeführt werden.The heat required for the fixation can be supplied as contact, ambient or radiant heat to the fiber.

Die Fixierung mittels Kontaktwärme kann auf einfache Weise erfolgen, indem auf bereits im Textilbetrieb vorhandene Vorrichtungen fiir den kontinuierlichen oder diskontinuierlichen Fixierprozess zurückgegriffen werden kann.Fixing by means of contact heat can be carried out in a simple manner by using devices that are already available in the textile operation for the continuous or discontinuous fixing process.

Im kontinuierlichen Verfahren kann die für die Fixierung erforderliche Wärme als Kontaktwärme mittels Kalander übertragen werden. Das Fasermaterial wird dabei vor dem Kontakt mit dem Kalander einseitig oder beidseitig mit der wasserundurchlässigen Folie bedeckt und iiber den Kalander gefahren. Wenn das Fasermaterial einseitig mit der Folie bedeckt wird, dient die Oberfläche des Kalanders als zweite Sperrschicht.In the continuous process, the heat required for the fixation can be transferred as contact heat using a calender. Before contact with the calender, the fiber material is covered on one or both sides with the water-impermeable film and passed over the calender. If the fiber material is covered on one side with the film, the surface of the calender serves as a second barrier layer.

In einer bevorzugten Ausgestaltung des kontinuierlichen Verfahrens wird ein wasserundurchlässiges Endlosband auf den Kalander aufgelegt oder angepresst und zwischen dieses Band und den Kalander das zu fixierende Fasermaterial eingezogen.In a preferred embodiment of the continuous process, a water-impermeable endless belt is placed or pressed onto the calender and the fiber material to be fixed is drawn in between this belt and the calender.

Im diskontinuierlichen Verfahren kann die für die Fixierung erforderliche Wärme als Kontaktwärme mittels einer Presse, wie etwa einer Transferbügelpresse, übertragen werden. Für die Durchführung des erfindungsgemässen Verfahrens sind keine oder nur geringfügige Modifikationen der Presse notwendig. Das Fasermaterial kann vor dem Fixieren beidseitig, sandwichartig, mit der wasserundurchlässigen Folie bedeckt und dann in die Presse eingelegt werden. Es ist aber auch möglich, eine oder beide Kontaktflächen der Presse mit wasserundurchlässigem Material auszurüsten und so das erfindungsgemässe Fixierverfahren durchzuführen. Dabei muss das Fasermaterial entweder nur auf einer Seite mit der wasserundurchlässigen Folie bedeckt werden oder, wenn die Presse auf beiden Seiten wasserundurchlässig ist, kann das entsprechend befeuchtete Fasermaterial auch unmittelbar in die Presse eingelegt werden.In the batch process, the heat required for the fixation can be transferred as contact heat by means of a press, such as a transfer ironing press. No or only slight modifications of the press are necessary to carry out the method according to the invention. Before fixing, the fiber material can be sandwiched on both sides, covered with the waterproof film and then into the Press. However, it is also possible to equip one or both contact surfaces of the press with water-impermeable material and thus to carry out the fixing method according to the invention. The fiber material either has to be covered on one side only with the water-impermeable film or, if the press is water-impermeable on both sides, the appropriately moistened fiber material can also be inserted directly into the press.

Neben der Kontaktwärme kann die für den erfindungsgemässen Fixierprozess notwendige Wärme auch als Umgebungswärme zugeführt werden. So kann das wasserdicht eingeschlossene Fasermaterial durch einen geheizten Tunnel geführt oder während der für die Fixierung erforderlichen Zeit in einem geheizten Raum eingeschlossen werden.In addition to the contact heat, the heat required for the fixing process according to the invention can also be supplied as ambient heat. For example, the waterproof, enclosed fiber material can be guided through a heated tunnel or enclosed in a heated room for the time required for fixing.

Die thermische Fixierung des wasserdicht eingeschlossenen Fasermaterials ist auch mittels Strahlungsenergie (Infrarotstrahlung, UV-Strahlung oder mittels Mikrowellen) möglich. Das wasserdicht eingeschlossene Fasermaterial wird entweder kontinuierlich durch einen mittels Stahlungsenergie geheizten Tunnel geführt oder diskontinuierlich während der für die Fixierung erfoderlichen Zeit in einem mittels Stahlungsenergie geheizten Raum eingeschlossen.The waterproof fixing of the fiber material enclosed in a watertight manner is also possible by means of radiation energy (infrared radiation, UV radiation or by means of microwaves). The watertight enclosed fiber material is either passed continuously through a tunnel heated by means of steel energy or intermittently enclosed in a room heated by means of steel energy during the time required for fixing.

Die nachstehenden Beispiele erläutern die Erfindung:The following examples illustrate the invention:

Beispiel 1: Auf ein gebleichtes, mercerisiertes Baumwollgewebe wird ein vierfarbiges Muster gedruckt. Example 1: A four-color pattern is printed on a bleached, mercerized cotton fabric.

Die jeweiligen Druckpasten enthalten dabei

  • 40 g/kg einer handelsüblichen Farbstofformulierung der Formel
    Figure imgb0001
  • 25 g/kg einer handelsüblichen Farbstoff-Formulierung der Formel
    Figure imgb0002
     beziehungsweise
  • 40 g/kg eines handelsüblichen, granulatförmigen Farbstoffgemisches der Formeln
    Figure imgb0003
     und
    Figure imgb0004
     beziehungsweise
  • 55 g/kg eines handelsüblichen granulatförmigen Farbstoffgemisches der Formeln
    Figure imgb0005
    Figure imgb0006
     und der Formel (IIIb).
The respective printing pastes contain
  • 40 g / kg of a commercially available dye formulation of the formula
    Figure imgb0001
  • 25 g / kg of a commercially available dye formulation of the formula
    Figure imgb0002
     respectively
  • 40 g / kg of a commercially available, granular dye mixture of the formulas
    Figure imgb0003
     and
    Figure imgb0004
     respectively
  • 55 g / kg of a commercially available granular dye mixture of the formulas
    Figure imgb0005
    Figure imgb0006
     and the formula (IIIb).

Die vorgehend genannten Reaktivfarbstoffe werden mit den folgenden Chemikalien zu einer Druckpaste vermischt. Das Endgewicht der Druckpasten beträgt jeweils 1000 g. Die Druckpaste enthält:

500 g/kg
6%ige Na-Alginatlösung
10 g/kg
m-Nitrobenzolsulfonsäure-Na-Salz
120 g/kg
25%ige Na2CO3-Lösung sowie
ad 1000 g Wasser.The reactive dyes mentioned above are mixed with the following chemicals to form a printing paste. The final weight of the printing pastes is 1000 g each. The printing paste contains:
500 g / kg
6% Na alginate solution
10 g / kg
m-nitrobenzenesulfonic acid sodium salt
120 g / kg
25% Na 2 CO 3 solution as well
ad 1000 g water.

Der so entstandene musterförmige Druck wird während 2 Minuten bei 120°C zwischengetrocknet.The resulting pattern-like print is dried for 2 minutes at 120 ° C.

Zur Befeuchtung wird mit einem Minimalauftraggerät der Druck auf der Rückseite mit 12% Wasser, bezogen auf das Gewicht des Fasermaterials, beaufschlagt.For moistening, the pressure on the back is applied with 12% water, based on the weight of the fiber material, using a minimal application device.

Die befeuchtete Ware wird zwischen zwei Polyesterfolien sandwichartig abdichtend eingetragen und zwecks Fixierung 8 Minuten bei 105°C auf einer Bügelpresse behandelt.The moistened product is sandwiched between two polyester films and treated for 8 minutes at 105 ° C on an ironing press for fixing.

Der so fixierte Druck wird in gewohnter Weise in kaltem und heissem Wasser ausgewaschen. Nach der Trocknung des Gewebes bei 90-100°C erhält man einen farbintensiven Reaktivdruck.The pressure fixed in this way is washed out in cold and hot water in the usual way. After drying the fabric at 90-100 ° C, a color-intensive reactive print is obtained.

Claims (14)

  1. A process for fixing reactive dyes on cellulosic textile material, which comprises
    a) wetting the dried fibre material, which has been printed with printing inks comprising fixing alkalis, with water,
    b) wrapping the fibre material with a water-impermeable material, and
    c) subjecting the wrapped fibre material to a heat treatment to effect fixation in the absence of solubilizers.
  2. A process according to claim 1, wherein the heat treatment is carried out with contact heat.
  3. A process according to claim 1, wherein the heat treatment is carried out with ambient heat.
  4. A process according to claim 1, wherein the heat treatment is carried out with radiation heat.
  5. A process according to any one of claims 1 to 4, wherein a flat fibre material is covered on both sides by the same water-impermeable material.
  6. A process according to claim 2, wherein a calender is used as heating element.
  7. A process according to claim 6, wherein the fibre material is covered with a water-impermeable material on the side facing away from the calender.
  8. A process according to claim 2, wherein a press is used as heating element.
  9. A process according to claim 8, wherein one or both contact surfaces of the press are provided with water-impermeable material.
  10. A process according to any one of claims 1 to 9, wherein the water-impermeable material used is a polyester sheet.
  11. A process according to any one of claims 1 to 9, wherein the water-impermeable material used is a sheet containing Teflon.
  12. A process according to any one of claims 1 to 9, wherein the water-impermeable material used is a heat-resistant rubber.
  13. A process according to any one of claims 1 to 12, wherein the reactive dye to be fixed is a dye which contains a monohalotriazine group.
  14. A process according to any one of claims 1 to 12, wherein the reactive dye to be fixed is a dye which contains one or more vinylsulfonyl groups.
EP92810557A 1991-07-30 1992-07-21 Process for fixation of reactive dye stuffs on cellulose containing textile material Expired - Lifetime EP0526400B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH228091 1991-07-30
CH2280/91 1991-07-30

Publications (2)

Publication Number Publication Date
EP0526400A1 EP0526400A1 (en) 1993-02-03
EP0526400B1 true EP0526400B1 (en) 1996-08-14

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EP (1) EP0526400B1 (en)
JP (1) JPH05209381A (en)
AT (1) ATE141350T1 (en)
DE (1) DE59206899D1 (en)
DK (1) DK0526400T3 (en)
ES (1) ES2090571T3 (en)

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Publication number Priority date Publication date Assignee Title
DE4306433A1 (en) * 1993-03-02 1994-09-08 Hoechst Ag Ink-jet single-phase reactive printing
EP0804754A1 (en) * 1995-01-17 1997-11-05 W.L. Gore & Associates, Inc. Method for making and using an improved durable printable sheet
KR100279282B1 (en) 1997-09-10 2001-01-15 백보현 Method for dyeing in a short time with low temperature, low bath ratio and tension using microwave
US6513924B1 (en) 2001-09-11 2003-02-04 Innovative Technology Licensing, Llc Apparatus and method for ink jet printing on textiles
CN103643565A (en) * 2013-12-02 2014-03-19 常熟市雄发针织毛绒有限公司 Printing and dyeing technology of colorful fabric
CN105568717A (en) * 2015-12-30 2016-05-11 宁夏中银绒业股份有限公司 Spray dyeing formula and spray dyeing method of spray dyed pattern
DE202018104420U1 (en) * 2018-07-31 2018-08-22 Hans Hall Gmbh Device for fastening a caterpillar track of a caterpillar track on a caterpillar track of the crawler
US11607891B2 (en) 2019-09-27 2023-03-21 Hill-Rom Services, Inc. Method of roll-to-roll digital printing, cutting, and punching of medical device surfaces

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DE1057055B (en) * 1955-09-21 1959-05-14 Monforts Fa A Method and device for the continuous treatment of textile webs
GB8920004D0 (en) * 1989-09-05 1989-10-18 John Green & Son Plc Printing of fabrics

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JPH05209381A (en) 1993-08-20
EP0526400A1 (en) 1993-02-03
ES2090571T3 (en) 1996-10-16
ATE141350T1 (en) 1996-08-15
US5273551A (en) 1993-12-28
DK0526400T3 (en) 1996-09-02
DE59206899D1 (en) 1996-09-19

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