EP0434016A1 - Process for making printing material - Google Patents

Process for making printing material Download PDF

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Publication number
EP0434016A1
EP0434016A1 EP90124722A EP90124722A EP0434016A1 EP 0434016 A1 EP0434016 A1 EP 0434016A1 EP 90124722 A EP90124722 A EP 90124722A EP 90124722 A EP90124722 A EP 90124722A EP 0434016 A1 EP0434016 A1 EP 0434016A1
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EP
European Patent Office
Prior art keywords
printing
ink
printing ink
resistance
epoxy
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Granted
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EP90124722A
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German (de)
French (fr)
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EP0434016B1 (en
Inventor
Norbert Strauss
Andreas Strauss
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Seidl and Partner GmbH
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Seidl and Partner GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52—Macromolecular coatings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/0011—Pre-treatment or treatment during printing of the recording material, e.g. heating, irradiating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/0041—Digital printing on surfaces other than ordinary paper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52—Macromolecular coatings
    • B41M5/5209—Coatings prepared by radiation-curing, e.g. using photopolymerisable compositions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52—Macromolecular coatings
    • B41M5/5218—Macromolecular coatings characterised by inorganic additives, e.g. pigments, clays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52—Macromolecular coatings
    • B41M5/5227—Macromolecular coatings characterised by organic non-macromolecular additives, e.g. UV-absorbers, plasticisers, surfactants

Definitions

  • the invention relates to a method for increasing the resistance of prints on absorbent substrates, in particular fabric, fabric, satin, nonwoven, etc.
  • resistance is meant a resistance to external influences, in particular weather resistance, washing resistance, dry and wet cleaning resistance and resistance to mechanical loads, such as Abrasion, or against chemical loads, e.g. against acids, bases, solvents, gases, vapors or fats.
  • the substrate can be given a form, which can contain, for example, the company name or other (standardized) information.
  • This type of imprint is usually applied during the production of the information carrier using the usual printing processes (eg flexographic, offset, letterpress, gravure or letterpress printing).
  • These information carriers which have all been given the same form or are possibly not printed, are usually also printed with individual information.
  • the EDP printer transfers the colored medium to the substrate through its printing unit.
  • an impact printer e.g. needle, matrix, type wheel, ball head printer
  • a color transfer by a thermal transfer printer from an ink pad by means of a stamp or any other type of color transfer possible.
  • the substrates used are usually a wide variety of fiber materials, e.g. (if necessary wet or alkali resistant) Fabrics and fabrics made of natural or synthetic fibers or a mixture thereof, satin, as well as more or less unoriented fiber products such as Fleece. Since all of these substrates have voids between the fibers and some of the fibers themselves are porous, the substrates are absorbent. This means that any applied color (regardless of the method of color transfer) can penetrate into the substrate.
  • the printing ink can be removed to a greater or lesser extent by external influences, for example weather, washing, dry or wet cleaning, abrasion, etc.
  • external influences for example weather, washing, dry or wet cleaning, abrasion, etc.
  • attempts have been made to increase the resistance of the subsequent printing by using special color ribbons or by using substrates which have particularly good affinities for the printing ink.
  • the object of the invention is to develop a method according to which the substrate is pretreated in order to increase the durability of an imprint to be made by means of an EDP printer (both pre-print and subsequent print). According to the invention, the method can also be used if only one of the two types of printing is to take place.
  • the resistance of a subsequently applied print can be significantly increased by prior painting or full-surface printing of the substrate with a paint or a printing ink.
  • the painting / printing can of course also be carried out optionally only at those points where a form and / or a subsequent print is to be made later.
  • the effect of the increased resistance is based on the one hand on the fact that the fibers of the substrate, in particular in layers close to the surface, are better anchored in the overall composite and thus the printed (colored or blackened) fibers cannot be easily removed.
  • the lacquer constricts the pores in the substrate so that the color can penetrate, but can no longer be easily removed.
  • fillers can be added to the lacquer, which help the lacquer layer to become microporosity.
  • Suitable fillers are e.g. finely divided silica, diatomaceous earth, chalk or calcium silicate.
  • the coating is to produce special optical effects, customary white or color pigments can also be added. Then the structure of the varnish practically corresponds to a printing ink.
  • fillers can also be used which have particularly large, platelet-shaped crystals. Examples include mica and kaolin.
  • the lacquer must be resistant to the stresses of external influences on the one hand and on the other hand it must have good adhesive strength even under the external influences that occur on the substrate.
  • the resistance of the paint itself is particularly high when it is a cross-linking system. This can be radiation crosslinking, moisture crosslinking, thermally or time-curing, one or two or more components. Systems that crosslink within a certain time at room temperature are the easiest to use in terms of painting technology.
  • the application can be carried out from solution in solvents, from a dispersion, in particular aqueous dispersion, or without solvents or dispersants, e.g. done from the melt.
  • Two-component epoxy-based paint resins that have excellent adhesive properties and are used as a solvent system have proven particularly useful.
  • labels 1 are sewn on, e.g. the washing and care instructions are printed.
  • these labels receive an imprint or a form 2 from the label manufacturer, e.g. in the flexographic printing process as requested by the clothing manufacturer.
  • This prints with an EDP printer, e.g. Matrix printer, the size and care instructions 3 for the garment just made on it, to match the form.
  • Fig. 1 shows such a label before the impression, Fig. 2 after the impression 3.
  • the label consists of a non-woven material.
  • the labels are previously coated by the label manufacturer in the course of the manufacturing process (printing, punching or perforating) before both printing processes, in this Trap all over.
  • an epoxy resin lacquer based on bisphenol A For example, an epoxy resin lacquer based on bisphenol A.
  • epoxy resin lacquers on a different basis are just as conceivable as any other lacquer or binder.
  • a polyamide amine based on a dimeric fatty acid together with p-amine was selected from the myriad of possibilities as the hardener component.
  • an antiblocking agent can be used, e.g. Silicones, waxes or acid amides. However, it must be used sparingly so that there are no difficulties with subsequent printing (concentration around or below 1%). As a rule, no antiblocking agent is required.
  • the paint can harden during transport or during storage at room temperature (chemical crosslinking reaction).
  • the curing time is about two days. Annealing, i.e. post-heat treatment of the coated labels for thermosetting, is thus eliminated.
  • the printing ink 4 wets the fibers 5, the cavities between the fibers 6 are retained. It does not matter whether it is the printing color of the pre-print or that of the subsequent print. By maintaining the cavities, the wash liquor can penetrate into these cavities when the garment is washed and attack the color over a large area. Due to the mechanical stress during washing, fibers are also detached from the composite. These are in the Rule fibers on the surface of the label, but because of the limited depth of penetration of the printing ink carry the largest part of this color, which significantly reduces the clarity of the printed image.
  • the fibers 5 are better embedded in the lacquer, the fiber detachment is very difficult. This contributes greatly to the preservation of the printed image.
  • the printing ink 4 penetrates deeper into the thinner capillaries 6, the surface area for the washing liquor is greatly reduced with the same amount of ink, so that less ink can be detached from the label.
  • the printing ink can still penetrate into fine pores 8 in the lacquer 7 itself, since this is filled with fillers. All in all, the possibilities of ink detachment are considerably reduced compared to the unpainted label, which is reflected in a significantly better wash resistance, i.e. the preservation of the printed image despite repeated washing. Due to the chemical constitution of the lacquer and its thermoset hardening, it shows excellent resistance to the chemical and mechanical loads that occur.

Abstract

There is described a process for enhancing the resistance to external influences, for example weathering, washing, wet and dry cleaning, solvents, fats, oils, mechanical abrasion, etc., of prints on absorbent substrates, for example stock, fabric or fleece. For this all of the substrate, or else only the areas where printing is to take place, is lacquered, impregnated, printed or coated, prior to the print proper, with an organic substance, preferably a lacquer or ink. Owing to their resistance to external influences, suitable binders for this purpose are those which crosslink chemically, specifically, owing to the good adhesion properties, epoxy resin lacquers combined with an appropriate hardener component. The effect of the lacquering is, on the one hand, to improve in particular integration of the surface-near fibres, which will carry the bulk of the subsequently applied printing ink and therefore are particularly important for the permanence of the printed image. Yet it also serves to narrow the large interstices and pores between the individual fibres to such an extent that the printing ink, which is after all applied in a very limited volume, can penetrate very deeply into these thin capillaries and hence will offer hardly any area of attack for a possible ink removal mechanism. The latter effect is appreciably enhanced by the admixture of fillers in the binder, since this produces a large number of further micropores for the printing ink to penetrate and from which it will be very difficult to remove.

Description

Die Erfindung betrifft ein Verfahren zur Erhöhung der Beständigkeit von Drucken auf saugfähigen Substraten, insbesondere Stoff, Gewebe, Satin, Vlies etc.. Unter Beständigkeit ist hierbei eine Beständigkeit gegen äußere Einflüsse zu verstehen, insbesondere Witterungsbeständigkeit, Waschbeständigkeit, Trocken- und Naßreinigungsbeständigkeit und Beständigkeit gegen mechanische Belastungen, wie z.B. Abrieb, oder gegen chemische Belastungen, wie z.B. gegen Säuren, Basen, Lösungsmittel, Gase, Dämpfe oder Fette.The invention relates to a method for increasing the resistance of prints on absorbent substrates, in particular fabric, fabric, satin, nonwoven, etc. By resistance is meant a resistance to external influences, in particular weather resistance, washing resistance, dry and wet cleaning resistance and resistance to mechanical loads, such as Abrasion, or against chemical loads, e.g. against acids, bases, solvents, gases, vapors or fats.

Diese Substrate werden als Informationsträger eingesetzt und werden hierfür in der Regel bedruckt. Bei der Bedruckung sind zwei prinzipiell unterschiedliche Vorgänge zu unterscheiden: Zunächst kann das Substrat einen Vordruck erhalten, der z.B. die Firmenbezeichnung oder sonstige (standardisierte) Informationen beinhalten kann. Diese Art von Aufdruck wird in der Regel bei der Herstellung des Informationsträgers mit den üblichen Druckverfahren (z.B. Flexo-, Offset-, Hoch-, Tief- oder Buchdruck) aufgebracht. Diese Informationsträger, die alle den gleichen Vordruck erhalten haben, oder ggf. auch nicht bedruckt sind, werden in der Regel zusätzlich mit einer individuellen Information bedrückt.These substrates are used as information carriers and are usually printed for this purpose. When printing, there are two fundamentally different processes: First, the substrate can be given a form, which can contain, for example, the company name or other (standardized) information. This type of imprint is usually applied during the production of the information carrier using the usual printing processes (eg flexographic, offset, letterpress, gravure or letterpress printing). These information carriers, which have all been given the same form or are possibly not printed, are usually also printed with individual information.

Die Drucke auf das in der Regel, aber nicht zwingend vorbedruckte Substrat, z.B. Etikett, erfolgen meist mit einem EDV-Drucker. Der EDV-Drucker überträgt hierzu durch seine Druckeinheit das farbige Medium auf das Substrat. Z.B. ist dies im Falle eines Impact-Druckers (z.B. Nadel-, Matrix-, Typenrad-, Kugelkopfdrucker) die ölige Druckfarbe eines Normalfarbbandes, im Falle eines Tintenstrahl-Druckers die Tinte, im Falle eines Laserdruckers der Toner. Auch ist z.B. eine Farbübertragung durch einen Thermotransferdrucker, von einem Stempelkissen mittels Stempel oder jede andere Art von Farbübertragung denkbar.The prints on the usually, but not necessarily pre-printed substrate, e.g. Label, usually done with an EDP printer. For this purpose, the EDP printer transfers the colored medium to the substrate through its printing unit. E.g. In the case of an impact printer (e.g. needle, matrix, type wheel, ball head printer), this is the oily ink of a normal ink ribbon, in the case of an inkjet printer, the ink, in the case of a laser printer, the toner. Also e.g. a color transfer by a thermal transfer printer, from an ink pad by means of a stamp or any other type of color transfer possible.

Die verwendeten Substrate sind üblicherweise verschiedenste Fasermaterialien, also z.B. (ggf. naßfeste oder laugenfeste) Stoffe und Gewebe aus Natur- oder Kunstfasern oder einem Gemisch daraus, Satin, sowie mehr oder weniger unorientierte Faserprodukte wie z.B. Vlies. Da all diese Substrate zwischen den Fasern Hohlräume aufweisen und teilweise die Fasern selbst porös sind, sind die Substrate saugfähig. Damit kann jegliche aufgetragene Farbe (unabhängig vom Verfahren der Farbübertragung) in das Substrat wegschlagen (penetrieren).The substrates used are usually a wide variety of fiber materials, e.g. (if necessary wet or alkali resistant) Fabrics and fabrics made of natural or synthetic fibers or a mixture thereof, satin, as well as more or less unoriented fiber products such as Fleece. Since all of these substrates have voids between the fibers and some of the fibers themselves are porous, the substrates are absorbent. This means that any applied color (regardless of the method of color transfer) can penetrate into the substrate.

Allerdings kann die Druckfarbe durch äußere Einflüsse, z.B. Witterung, Waschen, Trocken- oder Naßreinigung, Abrieb etc. zu einem mehr oder weniger großen Teil wieder herausgelöst werden. Um dies zu verhindern, wurde versucht, durch Einsatz von Spezialfarbbändern oder durch Verwendung von Substraten, die besonders gute Affinitäten zur Druckfarbe aufweisen, die Beständigkeiten des nachträglichen Aufdruckes zu erhöhen. Dies bedeutet jedoch für den Anwender einen zusätzlichen Aufwand bei der Benutzung von Spezialfarbbändern und eine eingeschränkte Substratauswahl bei der Herstellung und Verwendung. Auch waren die Ergebnisse oft nicht überzeugend.However, the printing ink can be removed to a greater or lesser extent by external influences, for example weather, washing, dry or wet cleaning, abrasion, etc. In order to prevent this, attempts have been made to increase the resistance of the subsequent printing by using special color ribbons or by using substrates which have particularly good affinities for the printing ink. However, this means additional effort for the user when using special color ribbons and a restricted choice of substrates during manufacture and use. The results were often not convincing.

Aus der DE-A-20 59 373 ist ein Verfahren zum Beschichten von Textilien bekannt, bei dem eine hochpolymere Verbindung durch Imprägnieren auf das textile Material in Kombination mit einer davon unterschiedlichen Epoxidverbindung aufgetragen wird, und danach erfolgt die Fixierung. Dieses Produkt ist bedruckbar, wobei die Haftfähigkeit der Druckfarbe im wesentlichen durch die chemischen Eigenschaften der Imprägnierung und der Epoxidverbindung bestimmt wird.From DE-A-20 59 373 a method for coating textiles is known, in which a highly polymeric compound is applied by impregnation to the textile material in combination with a different epoxy compound, and then the fixation takes place. This product is printable, whereby the adhesiveness of the printing ink is essentially determined by the chemical properties of the impregnation and the epoxy compound.

Dieses bekannte Produkt eignet sich jedoch nicht zum Bedrucken mittels EDV-Drucker mit den dabei eingesetzten Druckfarben.However, this known product is not suitable for printing by means of an EDP printer with the printing inks used.

Aufgabe der Erfindung ist es, ein Verfahren zu entwickeln, gemäß dem das Substrat vorbehandelt wird, um die Beständigkeit eines mittels EDV-Druckers vorzunehmenden Aufdruckes (sowohl Vordruck als auch nachträglicher Aufdruck) zu erhöhen. Erfindungsgemäß ist das Verfahren auch dann einsetzbar, wenn nur eine der beiden Arten des Aufdruckes erfolgen soll.The object of the invention is to develop a method according to which the substrate is pretreated in order to increase the durability of an imprint to be made by means of an EDP printer (both pre-print and subsequent print). According to the invention, the method can also be used if only one of the two types of printing is to take place.

Überraschenderweise wurde nun herausgefunden, daß durch eine vorherige Lackierung bzw. vollflächige Bedruckung des Substrates mit einem Lack oder einer Druckfarbe die Beständigkeit eines danach aufgebrachten Druckes (sowohl Vordruck als auch nachträglicher Aufdruck) deutlich erhöht werden kann. Die Lackierung/Bedruckung kann optional natürlich auch nur an denjenigen Stellen erfolgen, an denen später ein Vordruck und/oder ein nachträglicher Aufdruck erfolgen soll. Der Effekt der erhöhten Beständigkeit beruht einerseits darauf, daß die Fasern des Substrates, insbesondere in oberflächennahen Schichten, besser im Gesamtverbund verankert werden und somit die bedruckten (farbigen bzw. geschwärzten) Fasern nicht so leicht herausgelöst werden können. Andererseits werden durch die Lackierung die Poren im Substrat so verengt, daß die Farbe zwar eindringen, aber bei weitem nicht mehr so leicht herausgelöst werden kann.Surprisingly, it has now been found that the resistance of a subsequently applied print (both pre-print and subsequent print) can be significantly increased by prior painting or full-surface printing of the substrate with a paint or a printing ink. The painting / printing can of course also be carried out optionally only at those points where a form and / or a subsequent print is to be made later. The effect of the increased resistance is based on the one hand on the fact that the fibers of the substrate, in particular in layers close to the surface, are better anchored in the overall composite and thus the printed (colored or blackened) fibers cannot be easily removed. On the other hand, the lacquer constricts the pores in the substrate so that the color can penetrate, but can no longer be easily removed.

Durch die Lackierung werden natürlich auch Poren teilweise ganz verschlossen. Um diesen Nachteil, dem in der Praxis jedoch keine allzu große Bedeutung zukommt, zu kompensieren, können dem Lack Füllstoffe zugemischt werden, die der Lackschicht zu einer Mikroporosität verhelfen. Geeignete Füllstoffe sind z.B. hochdisperse Kieselsäure, Diatomeenerde, Kreide oder Calciumsilikat.Of course, the coating also partially closes pores. In order to compensate for this disadvantage, which, however, is not of great importance in practice, fillers can be added to the lacquer, which help the lacquer layer to become microporosity. Suitable fillers are e.g. finely divided silica, diatomaceous earth, chalk or calcium silicate.

Soll die Beschichtung noch besondere optische Effekte bewirken, so können noch übliche Weiß- oder Farbpigmente zugemischt werden. Dann entspricht der Aufbau des Lackes praktisch einer Druckfarbe. Für besondere optische Schillereffekte kann man auch Füllstoffe einsetzen, die besonders große, plättchenförmige Kristalle aufweisen. Als Beispiele seien Glimmer und Kaolin genannt.If the coating is to produce special optical effects, customary white or color pigments can also be added. Then the structure of the varnish practically corresponds to a printing ink. For special optical iridescence, fillers can also be used which have particularly large, platelet-shaped crystals. Examples include mica and kaolin.

Vom chemischen Aufbau her gesehen muß der Lack einerseits gegen die Belastungen der äußeren Einflüsse resistent sein und andererseits eine gute Haftfestigkeit auch unter den auftretenden äußeren Einflüssen auf dem Substrat aufweisen. Die Resistenz des Lackes selbst ist vor allem dann hoch, wenn es sich um ein vernetzendes System handelt. Dies kann strahlenvernetzend, feuchtigkeitsvernetzend, thermisch oder zeitlich härtend, ein- oder zwei- oder mehrkomponentig sein. Von der Lackiertechnik her am einfachsten zu handhaben sind Systeme, die bei Raumtemperatur innerhalb einer gewissen Zeit vernetzen. Dabei kann die Applikation aus der Lösung in Lösungsmitteln, aus einer Dispersion, insbesondere wässrige Dispersion oder ohne Lösungs- oder Dipersionsmittel, z.B. aus der Schmelze erfolgen. Besonders bewährt haben sich hierbei Zweikomponenten-Lackharze auf Epoxidbasis, die hervorragende Hafteigenschaften aufweisen und als Lösungsmittelsystem appliziert werden.From a chemical point of view, the lacquer must be resistant to the stresses of external influences on the one hand and on the other hand it must have good adhesive strength even under the external influences that occur on the substrate. The resistance of the paint itself is particularly high when it is a cross-linking system. This can be radiation crosslinking, moisture crosslinking, thermally or time-curing, one or two or more components. Systems that crosslink within a certain time at room temperature are the easiest to use in terms of painting technology. The application can be carried out from solution in solvents, from a dispersion, in particular aqueous dispersion, or without solvents or dispersants, e.g. done from the melt. Two-component epoxy-based paint resins that have excellent adhesive properties and are used as a solvent system have proven particularly useful.

Nachfolgend ist die Erfindung anhand eines Beispieles erläutert:The invention is explained below using an example:

Hierzu zeigen die

Fig. 1:
Etikett vor dem nachträglichen Aufdruck
Fig. 2:
Etikett mit dem nachträglichen Aufdruck mittels konventionellem Drucker mit Normalfarbband
Fig. 3:
Etikett im Querschnitt mit dem nachträglichen Aufdruck mittels konventionellem Drucker mit Normalfarbband
Fig. 4:
Etikett im Querschnitt mit dem nachträglichen Aufdruck mittels konventionellem Drucker mit Normalfarbband, behandelt nach dem erfindungsgemäßen Verfahren
The show
Fig. 1:
Label before subsequent printing
Fig. 2:
Label with subsequent printing using a conventional printer with a normal ink ribbon
Fig. 3:
Cross-section label with subsequent printing using a conventional printer with a normal ink ribbon
Fig. 4:
Cross-sectional label with the subsequent printing by means of a conventional printer with a normal ink ribbon, treated by the method according to the invention

In den meisten Kleidungsstücken sind Etiketten 1 eingenäht, auf denen z.B. die Wasch- und Pflegeanleitung aufgedruckt ist. In der Regel erhalten diese Etiketten vom Etikettenhersteller einen Aufdruck bzw. einen Vordruck 2, z.B. im Flexodruckverfahren nach Wunsch des Bekleidungsherstellers. Dieser wiederum druckt mit einem EDV-Drucker, z.B. Matrixdrucker, die Größe und Pflegeanleitung 3 für das gerade gefertigte Bekleidungsstück darauf, passend zum Vordruck. Fig. 1 zeigt ein solches Etikett vor dem Eindruck, Fig. 2 nach dem Eindruck 3. Das Etikett besteht aus einem Vliesmaterial.In most items of clothing, labels 1 are sewn on, e.g. the washing and care instructions are printed. As a rule, these labels receive an imprint or a form 2 from the label manufacturer, e.g. in the flexographic printing process as requested by the clothing manufacturer. This in turn prints with an EDP printer, e.g. Matrix printer, the size and care instructions 3 for the garment just made on it, to match the form. Fig. 1 shows such a label before the impression, Fig. 2 after the impression 3. The label consists of a non-woven material.

Um die Wasch- und Reinigungsbeständigkeit sowohl des Vordruckes 2, als auch des nachträglichen Eindruckes 3 zu erhöhen, den der Bekleidungshersteller aufdruckt, werden die Etiketten vorher vom Etikettenhersteller im Rahmen des Herstellprozesses (Drucken, Stanzen oder Perforieren) erfindungsgemäß vor beiden Druckvorgängen lackiert, in diesem Falle vollflächig.In order to increase the washing and cleaning resistance of both the preprint 2 and the subsequent impression 3, which the clothing manufacturer prints, the labels are previously coated by the label manufacturer in the course of the manufacturing process (printing, punching or perforating) before both printing processes, in this Trap all over.

Zum Einsatz kommt z.B. ein Epoxidharzlack auf der Basis von Bisphenol A. Epoxidharzlacke auf anderer Basis sind jedoch genauso denkbar wie beliebig andere Lacke bzw. Bindemittel. Als Härterkomponente wurde aus den unzähligen Möglichkeiten ein Polyamid-Amin auf der Basis einer dimeren Fettsäure zusammen mit p-Amin ausgewählt. Der Lack ist lösungsmittelhaltig und trocknet sehr rasch (physikalische Trocknung = Verdampfen des Lösungsmittels). Danach ist der Lack klebfrei, die Etiketten können fertig konfektioniert werden.For example, an epoxy resin lacquer based on bisphenol A. However, epoxy resin lacquers on a different basis are just as conceivable as any other lacquer or binder. A polyamide amine based on a dimeric fatty acid together with p-amine was selected from the myriad of possibilities as the hardener component. The paint contains solvents and dries very quickly (physical drying = evaporation of the solvent). The paint is then tack-free and the labels can be assembled.

Sollte trotzdem die Gefahr des Verblockens bestehen, kann noch ein Antiblockmittel eingesetzt werden, z.B. Silicone, Wachse oder Säureamide. Der Einsatz muß aber sparsam erfolgen, damit es keine Schwierigkeiten mit dem nachträglichen Bedrucken gibt (Konzentration um oder unter 1%). In der Regel wird kein Antiblockmittel benötigt.If there is still a risk of blocking, an antiblocking agent can be used, e.g. Silicones, waxes or acid amides. However, it must be used sparingly so that there are no difficulties with subsequent printing (concentration around or below 1%). As a rule, no antiblocking agent is required.

Da das Zweikomponentensystem auf Kalthärtung ausgelegt ist, kann der Lack auf dem Transportweg oder während der Lagerdauer bei Raumtemperatur aushärten (Chemische Vernetzungsreaktion). Die Dauer für die Härtung beträgt etwa zwei Tage. Ein Tempern, also eine Wärmenachbehandlung der lackierten Etiketten zur Warmaushärtung entfällt hiermit.Since the two-component system is designed for cold curing, the paint can harden during transport or during storage at room temperature (chemical crosslinking reaction). The curing time is about two days. Annealing, i.e. post-heat treatment of the coated labels for thermosetting, is thus eliminated.

Die Wirkungsweise der Lackierung zeigen die Fig. 3 (unlakkiert) und 4 (nach dem erfindungsgemäßen Verfahren lak-kiert):The mode of action of the paint is shown in FIGS. 3 (unlaked) and 4 (lacquered by the process according to the invention):

Beim unlackierten Etikett benetzt die Druckfarbe 4 die Fasern 5, die Hohlräume zwischen den Fasern 6 bleiben erhalten. Dabei ist es egal, ob es sich um die Druckfarbe des Vordruckes oder um diejenige des nachträglichen Aufdruckes handelt. Durch das Erhalten der Hohlräume kann die Waschlauge beim Waschen des Kleidungsstückes in diese Hohlräume eindringen und die Farbe großflächig angreifen. Durch die mechanische Belastung beim Waschen werden zusätzlich noch Fasern aus dem Verbund herausgelöst. Dies sind in der Regel Fasern an der Oberfläche des Etiketts, die aber wegen der beschränkten Eindringtiefe der Druckfarbe den größten Anteil dieser Farbe tragen, was die Deutlichkeit des Druckbildes erheblich verringert.In the case of the unpainted label, the printing ink 4 wets the fibers 5, the cavities between the fibers 6 are retained. It does not matter whether it is the printing color of the pre-print or that of the subsequent print. By maintaining the cavities, the wash liquor can penetrate into these cavities when the garment is washed and attack the color over a large area. Due to the mechanical stress during washing, fibers are also detached from the composite. These are in the Rule fibers on the surface of the label, but because of the limited depth of penetration of the printing ink carry the largest part of this color, which significantly reduces the clarity of the printed image.

Beim lackierten Etikett dagegen sind die Fasern 5 besser im Lack eingebettet, die Faserablösung ist stark erschwert. Dies trägt sehr stark zur Erhaltung des Druckbildes bei. Durch das Verengen der Poren und Zwischenräume 6 zwischen den Fasern durch die Lackierung 7 dringt die Druckfarbe 4 tiefer in die dünneren Kapillaren 6 ein, die Angriffsfläche für die Waschlauge ist bei gleicher Farbmenge stark reduziert, wodurch weniger Farbe vom Etikett abgelöst werden kann. Außerdem kann die Druckfarbe noch in feine Poren 8 in den Lack 7 selbst eindringen, da dieser mit Füllstoffen gefüllt ist. Insgesamt sind also die Möglichkeiten der Farbablösung im Vergleich zum unlackierten Etikett ganz erheblich reduziert, was sich in einer deutlich besseren Waschbeständigkeit, also der Erhaltung des Druckbildes trotz vielfachen Waschens, äußert. Aufgrund der chemischen Konstitution des Lackes und seiner duroplastischen Aushärtung zeigt er hervorragende Widerstandsfähigkeit gegen die auftretenden chemischen und mechanischen Belastungen.In contrast, in the case of the lacquered label, the fibers 5 are better embedded in the lacquer, the fiber detachment is very difficult. This contributes greatly to the preservation of the printed image. By narrowing the pores and spaces 6 between the fibers through the coating 7, the printing ink 4 penetrates deeper into the thinner capillaries 6, the surface area for the washing liquor is greatly reduced with the same amount of ink, so that less ink can be detached from the label. In addition, the printing ink can still penetrate into fine pores 8 in the lacquer 7 itself, since this is filled with fillers. All in all, the possibilities of ink detachment are considerably reduced compared to the unpainted label, which is reflected in a significantly better wash resistance, i.e. the preservation of the printed image despite repeated washing. Due to the chemical constitution of the lacquer and its thermoset hardening, it shows excellent resistance to the chemical and mechanical loads that occur.

Claims (11)

Verfahren zur Erhöhung der Haftfestigkeit von Drucken auf saugfähigen Substraten, dadurch gekennzeichnet, daß man die Substrate ein- oder beidseitig mit einem durch Strahlung, Feuchtigkeit, Wärme oder bei Raumtemperatur vernetzenden ein-, zwei- oder mehrkomponentigen System, das gegebenenfalls Pigmente und/oder Füllstoffe enthält, in an sich bekannter Weise beschichtet und darauf die Druckfarbe mit einem EDV-Drucker aufbringt.Process for increasing the adhesive strength of prints on absorbent substrates, characterized in that the substrates are coated on one or both sides with a one-, two- or more-component system which crosslinks by radiation, moisture, heat or at room temperature and which optionally contains pigments and / or fillers contains, coated in a manner known per se and the printing ink is applied thereon with an EDP printer. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die organische Substanz (7) durch Lackieren, Bedrucken, Beschichten oder Imprägnieren aufgebracht wird.A method according to claim 1, characterized in that the organic substance (7) is applied by painting, printing, coating or impregnating. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die organische Substanz ein Lack ist.A method according to claim 1 or 2, characterized in that the organic substance is a lacquer. Verfahren nach Anspruch 5, dadurch gekennzeichnet, daß das Zwei-Komponenten-System auf Epoxidbasis aufgebaut ist.A method according to claim 5, characterized in that the two-component system is based on epoxy. Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß das Epoxid auf der Basis von Bisphenol A aufgebaut ist.A method according to claim 4, characterized in that the epoxy is based on bisphenol A. Verfahren nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß der Härter für das Epoxidsystem auf der Basis eines Amins aufgebaut ist.A method according to claim 4 or 5, characterized in that the hardener for the epoxy system is based on an amine. Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß der Härter für das Epoxidsystem auf der Basis eines Polyamid-Amins, insbesondere Polyamid-Amin auf der Basis einer dimeren Fettsäure mit p-Amin, aufgebaut ist.A method according to claim 6, characterized in that the hardener for the epoxy system is based on a polyamide amine, in particular polyamide amine based on a dimeric fatty acid with p-amine. Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die organische Substanz als lösungsmittelhaltiges System appliziert wird.Method according to one of claims 1 to 7, characterized in that the organic substance is applied as a solvent-containing system. Verfahren nach Anspruch 8, dadurch gekennzeichnet, daß das Lösungsmittel Toluol, Äthylacetat, Benzin, Alkohol (Äthanol, Isopropanol, n-Propanol) oder ein Gemisch hiervon ist.A method according to claim 8, characterized in that the solvent is toluene, ethyl acetate, gasoline, alcohol (ethanol, isopropanol, n-propanol) or a mixture thereof. Verfahren nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß als Füllstoffe hochdisperse Kieselsäure, Diatomeenerde, Calciumsilikat, Talkum, Kreide, Glimmer und/oder Kaolin eingesetzt werden.Method according to one of claims 1 to 9, characterized in that highly disperse silica, diatomaceous earth, calcium silicate, talc, chalk, mica and / or kaolin are used as fillers. Bedruckbares Material, insbesondere herstellbar mit dem Verfahren nach einem der Ansprüche 1 bis 10, gekennzeichnet durch ein saugfähiges Substrat, das einoder beidseitig mit einem vernetzten ein-, zwei- oder mehrkomponentigen System beschichtet ist.Printable material, in particular producible with the method according to one of claims 1 to 10, characterized by an absorbent substrate which is coated on one or both sides with a crosslinked one, two or more component system.
EP90124722A 1989-12-22 1990-12-19 Process for making printing material Revoked EP0434016B1 (en)

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DE3942614 1989-12-22
DE3942614A DE3942614C1 (en) 1989-12-22 1989-12-22

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2278832A1 (en) * 1974-07-19 1976-02-13 Henkel & Cie Gmbh Transfer printing of synthetic textiles - after treatment with reactive polyamine-glycol ether cpds

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Publication number Priority date Publication date Assignee Title
DE546605C (en) * 1926-06-13 1932-03-14 Louis Blumer Fa Process for the production of a solution which can be used as a lacquer or as a binding and impregnating agent
NL83856C (en) * 1952-03-11 1900-01-01
CH1804669A4 (en) * 1969-12-03 1972-02-29

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2278832A1 (en) * 1974-07-19 1976-02-13 Henkel & Cie Gmbh Transfer printing of synthetic textiles - after treatment with reactive polyamine-glycol ether cpds

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 12, no. 160 (M-697)(3007) 14 Mai 1988, & JP-A-62 270080 (DENKI K.K.) 02 Dezember 1987, *

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ATE123447T1 (en) 1995-06-15
DE59009206D1 (en) 1995-07-13
DE3942614C1 (en) 1991-05-29

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