EP2874898B1 - Method of manufacturing a colored, water-soluble packaging - Google Patents

Method of manufacturing a colored, water-soluble packaging Download PDF

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Publication number
EP2874898B1
EP2874898B1 EP13739641.2A EP13739641A EP2874898B1 EP 2874898 B1 EP2874898 B1 EP 2874898B1 EP 13739641 A EP13739641 A EP 13739641A EP 2874898 B1 EP2874898 B1 EP 2874898B1
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EP
European Patent Office
Prior art keywords
water
soluble
printing
film web
agents
Prior art date
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Application number
EP13739641.2A
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German (de)
French (fr)
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EP2874898A1 (en
Inventor
Frank Meier
Matthias Sunder
Ulf Arno Timmann
Konstantin Benda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Henkel AG and Co KGaA
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Henkel AG and Co KGaA
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Publication date
Application filed by Henkel AG and Co KGaA filed Critical Henkel AG and Co KGaA
Priority to EP18161613.7A priority Critical patent/EP3354591A1/en
Priority to EP18161614.5A priority patent/EP3354592A1/en
Priority to EP18161615.2A priority patent/EP3354593A1/en
Publication of EP2874898A1 publication Critical patent/EP2874898A1/en
Application granted granted Critical
Publication of EP2874898B1 publication Critical patent/EP2874898B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B65D65/46—Applications of disintegrable, dissolvable or edible materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/02—Enclosing successive articles, or quantities of material between opposed webs
    • B65B9/04—Enclosing successive articles, or quantities of material between opposed webs one or both webs being formed with pockets for the reception of the articles, or of the quantities of material
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
    • C11D17/04—Detergent materials or soaps characterised by their shape or physical properties combined with or containing other objects
    • C11D17/041—Compositions releasably affixed on a substrate or incorporated into a dispensing means
    • C11D17/042—Water soluble or water disintegrable containers or substrates containing cleaning compositions or additives for cleaning compositions

Definitions

  • the invention relates to a method for producing a water-soluble packaging which comprises a liquid washing or cleaning agent and a water-soluble casing.
  • Detergents and cleaning agents are now available to consumers in a wide variety of forms. In addition to powders and granules, this range also includes, for example, liquids, gels or portion packs (tablets or filled bags).
  • portion packs in the form of water-soluble packaging with liquid detergents or cleaning agents are becoming more and more popular;
  • Such a water-soluble bag contains an agent and a transparent, water-soluble envelope.
  • detergents In order, for example, to prevent previously loosened dirt from being redeposited, detergents contain so-called graying inhibitors, such as carboxymethyl cellulose. Due to the low solubility of carboxymethyl cellulose in liquid detergents or cleaning agents, clouding occurs when carboxymethyl cellulose is incorporated into liquid washing or cleaning agents. This leads to an aesthetically unappealing product.
  • washing or cleaning agents In order to increase or lengthen the scent impression of the surfaces treated with them, such as textiles, washing or cleaning agents contain perfume capsules. In order to achieve a homogeneous and stable distribution of the perfume capsules and thus to achieve an aesthetically pleasing product, the detergents or cleaning agents contain thickeners and / or dispersants. These agents are often very expensive and do not themselves show any washing or cleaning performance.
  • the object of the invention is, in the production of a water-soluble packaging which comprises a liquid detergent or cleaning agent and a water-soluble casing, to produce a permanent print image on the water-soluble cover, which is stable against smudging or disappearing and against mechanical friction.
  • the invention relates to a method for producing a water-soluble packaging which contains a liquid detergent or cleaning agent and a water-soluble casing.
  • the water-soluble cover is at least partially colored with a coloring substance
  • a water-soluble packaging contains a water-soluble casing which forms a closed structure which has one or more chambers in its interior for receiving one or more agents.
  • the water-soluble envelope is formed by a water-soluble film material.
  • the water-soluble packaging can be designed to be dimensionally stable or deformable.
  • the water-soluble packaging in principle, however, it is also possible and preferred to shape the water-soluble packaging as a non-dimensionally stable container, for example as a bag.
  • the shape of such a water-soluble packaging can largely be adapted to the conditions of use. For example, a wide variety of shapes such as hoses, cushions, cylinders, bottles or disks are possible.
  • the water-soluble packaging can have one or more chambers for storing one or more agents.
  • the water-soluble packaging preferably has between two and five chambers.
  • the water-soluble envelope is preferably formed from a water-soluble film material which is selected from the group consisting of polymers or polymer mixtures.
  • the envelope can be formed from one or from two or more layers of the water-soluble film material.
  • the water-soluble film material of the first layer and the further layers, if any, can be the same or different.
  • Particularly preferred are foils which, for example, can be glued and / or sealed to form packaging such as tubes or pillows after they have been filled with an agent.
  • the water-soluble casing contains polyvinyl alcohol or a polyvinyl alcohol copolymer.
  • Water-soluble casings which contain polyvinyl alcohol or a polyvinyl alcohol copolymer have good stability with sufficiently high water solubility, in particular cold water solubility.
  • Suitable water-soluble films for producing the water-soluble envelope are preferably based on a polyvinyl alcohol or a polyvinyl alcohol copolymer whose molecular weight is in the range from 10,000 to 1,000,000 gmol -1 , preferably from 20,000 to 500,000 gmol -1 , particularly preferably from 30,000 to 100,000 gmol -1 and in particular from 40,000 to 80,000 gmol -1 .
  • polyvinyl alcohol is usually done by hydrolysis of polyvinyl acetate, since the direct synthesis route is not possible.
  • polyvinyl alcohol copolymers which are produced from polyvinyl acetate copolymers.
  • at least one layer of the water-soluble coating comprises a polyvinyl alcohol whose degree of hydrolysis is 70 to 100 mol%, preferably 80 to 90 mol%, particularly preferably 81 to 89 mol% and in particular 82 to 88 mol%.
  • a polyvinyl alcohol-containing film material suitable for producing the water-soluble envelope can additionally contain a polymer selected from the group comprising (meth) acrylic acid-containing (co) polymers, polyacrylamides, oxazoline polymers, polystyrene sulfonates, polyurethanes, polyesters, polyethers, polylactic acid or mixtures of the above Polymers may be added.
  • a preferred additional polymer are polylactic acids.
  • Preferred polyvinyl alcohol copolymers include, in addition to vinyl alcohol, dicarboxylic acids as further monomers.
  • Suitable dicarboxylic acids are itaconic acid, malonic acid, succinic acid and mixtures thereof, with itaconic acid being preferred.
  • polyvinyl alcohol copolymers include, in addition to vinyl alcohol, an ethylenic one unsaturated carboxylic acid, its salt or its ester.
  • Such polyvinyl alcohol copolymers particularly preferably contain acrylic acid, methacrylic acid, acrylic acid esters, methacrylic acid esters or mixtures thereof in addition to vinyl alcohol.
  • the film material contains further additives.
  • the film material can for example contain plasticizers such as dipropylene glycol, ethylene glycol, diethylene glycol, propylene glycol, glycerine, sorbitol, mannitol or mixtures thereof.
  • Further additives include, for example, release aids, fillers, crosslinking agents, surfactants, antioxidants, UV absorbers, antiblocking agents, anti-stick agents or mixtures thereof.
  • Suitable water-soluble films for use in the water-soluble envelopes of the water-soluble packaging according to the invention are films which are sold by MonoSol LLC, for example under the designation M8630, C8400 or M8900.
  • Other suitable films include films with the designation Solublon® PT, Solublon® GA, Solublon® KC or Solublon® KL from Aicello Chemical Europe GmbH or the films VF-HP from Kuraray.
  • the water-soluble envelope is colored with a coloring substance selected from the group consisting of pigments, bluing agents and / or pearlescent agents.
  • the coloring substance is applied to the inner surface of the water-soluble cover by means of printing.
  • the inner surface of the water-soluble cover is at least partially printed with a coloring substance.
  • a coloring substance it is particularly preferable for the printing on the water-soluble cover to be water-soluble or water-dispersible.
  • Applying the coloring substance by means of printing has the advantage that the coloring of the water-soluble casing is individualized, that is to say it can be carried out in accordance with the requirements of the respective water-soluble packaging.
  • any form of printing can be used to print the water-soluble cover, such as, for example, gravure printing, offset printing, screen printing, flexographic printing, airbrush, inkjet printing or pad printing or any combination of these printing technologies.
  • the printing is preferably carried out by means of inkjet printing, since with this printing technology there is no mechanical contact with and therefore no mechanical stress on the water-soluble envelope. The same applies to direct printing with piezo technology, as this also takes place without contact.
  • Printing using inkjet printing or direct printing with piezo technology is suitable in particular for printing on water-soluble packaging.
  • the water-soluble envelope can be printed with a water-soluble ink or another suitable medium.
  • Water-soluble inks are known, for example, under the trade name SunChemical Aquadestruct from SunChemical, Aqua Poly Super Opaque White QW000046 from Environmental Inks or Opta Film OPQ White WOL009656 from Water Ink Technologies Inc.
  • the printing can take place in the form of areas, so that the water-soluble cover is at least partially colored with a coloring substance over the entire area.
  • the printing can be in the form of letters, numbers, symbols, ornaments or the like.
  • the water-soluble envelope can be transparent, translucent or opaque in the area that is colored.
  • Suitable pigments which can be contained in the medium for printing the inner surface of the water-soluble envelope are, for example, ultramarine or titanium dioxide.
  • Suitable bluing agents which can be contained in the medium for printing the inner surface of the water-soluble envelope are, for example, dyes which are classified in the Color Index (CI) as Direct Blue, Direct Red, Direct Violet, Acid Blue, Acid Red, Acid Violet , Basic Blue, Basic Violet or Basic Red.
  • CI Color Index
  • polymeric dyes such as those available, for example, from Milliken under the name “Liquitint®”. Pigments such as ultramarine are also suitable as bluing agents.
  • Pearlescent agents that may be included in the medium for printing the inner surface of the water-soluble envelope are mica, metal oxide coated mica, silica coated mica, bismuth oxychloride coated mica, bismuth oxychloride, glass, metal oxide coated glass, polyester glitter and / or metal glitter.
  • the term “inner surface of the water-soluble envelope” denotes the surface which is in contact with the agent enclosed by the water-soluble envelope.
  • the water-soluble packaging has a liquid washing or cleaning agent.
  • the water-soluble packaging has a chamber for receiving the agent.
  • the water-soluble packaging has two chambers.
  • the water-soluble packaging has three chambers, these can each contain a liquid agent.
  • the liquid washing or cleaning agents that are contained in the different chambers of a water-soluble packaging can have the same composition.
  • the agents preferably have compositions which differ in at least one ingredient or at least in the content of one ingredient.
  • the liquid detergent or cleaning agent contains ingredients that do not destroy the structural integrity of the water-soluble coating.
  • the liquid detergent or cleaning agent can contain one or more substances from the group of surfactants, builders, bleaches, bleach activators, bleach catalysts, enzymes, enzyme stabilizers, electrolytes, pH adjusters, perfumes, perfume carriers, fluorescent agents, dyes, hydrotopes, foam inhibitors, silicone oils, anti-redeposition agents Antimicrobial agents, antioxidants, antioxidants, preservatives, corrosion inhibitors, antistatic agents, bitter agents, ironing aids, phobic and impregnating agents, anti-slip agents, anti-slip agents, skin-proofing agents, anti-slip agents, opacifiers Contain plasticizing components, fillers and UV absorbers.
  • the liquid washing or cleaning agents can contain water, the water content being less than 10% by weight and more preferably less than 8% by weight, based in each case on the total liquid washing or cleaning agent.
  • the printing process can optionally be followed by a drying process in which the solvent contained in the ink or in the medium containing the coloring substance is evaporated / removed by blowing on or overblown tempered gas, passing through a drying oven or irradiation with infrared light .
  • the printing process can be followed by a curing process with UV light.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung einer wasserlöslichen Verpackung, die ein flüssiges Wasch- oder Reinigungsmittel und eine wasserlösliche Umhüllung umfasst.The invention relates to a method for producing a water-soluble packaging which comprises a liquid washing or cleaning agent and a water-soluble casing.

Wasch- oder Reinigungsmittel sind heute für den Verbraucher in vielfältigen Angebotsformen erhältlich. Neben Pulvern und Granulaten umfasst dieses Angebot beispielsweise auch Flüssigkeiten, Gele oder Portionspackungen (Tabletten oder gefüllte Beutel).Detergents and cleaning agents are now available to consumers in a wide variety of forms. In addition to powders and granules, this range also includes, for example, liquids, gels or portion packs (tablets or filled bags).

Insbesondere Portionspackungen in Form von wasserlöslichen Verpackungen mit flüssigen Wasch- oder Reinigungsmitteln werden immer beliebter, erfüllen sie einerseits den Wunsch des Verbrauchers nach vereinfachter Dosierung und andererseits bevorzugen immer mehr Verbraucher flüssige Wasch- oder Reinigungsmittel.In particular, portion packs in the form of water-soluble packaging with liquid detergents or cleaning agents are becoming more and more popular;

Ein solcher wasserlöslicher Beutel enthält ein Mittel und eine transparente, wasserlösliche Umhüllung.Such a water-soluble bag contains an agent and a transparent, water-soluble envelope.

Zur Erhöhung der Wasch- oder Reinigungsleistung von Wasch- oder Reinigungsmitteln enthalten diese häufig ein oder mehrere Zusatzstoffe. Um beispielsweise ein Wiederaufziehen von vorher losgelöstem Schmutz in feinerer Verteilung (Redeposition) zu verhindern, enthalten Waschmittel so genannte Vergrauungsinhibitoren, wie zum Beispiel Carboxymethylcellulose. Aufgrund der geringen Löslichkeit von Carboxymethylcellulose in flüssigen Wasch- oder Reinigungsmitteln kommt es bei Einarbeitung von Carboxymethylcellulose in flüssige Wasch- oder Reinigungsmittel zu Trübungen. Dies führt zu einem ästhetisch wenig ansprechenden Produkt.To increase the washing or cleaning performance of washing or cleaning agents, these often contain one or more additives. In order, for example, to prevent previously loosened dirt from being redeposited, detergents contain so-called graying inhibitors, such as carboxymethyl cellulose. Due to the low solubility of carboxymethyl cellulose in liquid detergents or cleaning agents, clouding occurs when carboxymethyl cellulose is incorporated into liquid washing or cleaning agents. This leads to an aesthetically unappealing product.

Um den Dufteindruck den Wasch- oder Reinigungsmitteln damit behandelten Oberflächen, wie beispielsweise Textilien, zu erhöhen oder zu verlängern, enthalten Wasch- oder Reinigungsmittel Parfümkapseln. Um eine homogene und stabile Verteilung der Parfümkapseln zu erreichen und somit zu einem ästhetisch ansprechenden Produkt zu gelangen, enthalten die Wasch- oder Reinigungsmittel Verdickungsmittel und/oder Dispergiermittel. Diese Mittel sind oftmals sehr teuer und zeigen selber keinerlei Wasch- oder Reinigungsleistung.In order to increase or lengthen the scent impression of the surfaces treated with them, such as textiles, washing or cleaning agents contain perfume capsules. In order to achieve a homogeneous and stable distribution of the perfume capsules and thus to achieve an aesthetically pleasing product, the detergents or cleaning agents contain thickeners and / or dispersants. These agents are often very expensive and do not themselves show any washing or cleaning performance.

In der internationalen Patentanmeldung WO 2008/973299 A1 wird ein Verfahren zur Herstellung von wasserlöslichen Verpackungen beschrieben, welche einen bedruckten wasserlöslichen Film und ein farbiges flüssiges Waschmittel umfassen.In the international patent application WO 2008/973299 A1 describes a process for the production of water-soluble packaging which comprises a printed water-soluble film and a colored liquid detergent.

Die britische Patentanmeldung GB 2475538 A beschreibt eine kontinuierlich rotierende Tiefziehmaschine für die Herstellung wasserlöslicher Verpackungen, welche im Rahmen ihrer Herstellung auch bedruckt werden können.the British patent application GB 2475538 A describes a continuously rotating Thermoforming machine for the production of water-soluble packaging, which can also be printed as part of its production.

Aufgabe der Erfindung ist es, bei Herstellung einer wasserlöslichen Verpackung, die ein flüssiges Wasch- oder Reinigungsmittel und eine wasserlösliche Umhüllung umfasst,
ein beständiges Druckbild auf der wasserlöslichen Umhüllung zu erzeugen, das gegen Verwischen oder Verschwinden und gegen mechanische Reibung stabil ist.The object of the invention is, in the production of a water-soluble packaging which comprises a liquid detergent or cleaning agent and a water-soluble casing,
to produce a permanent print image on the water-soluble cover, which is stable against smudging or disappearing and against mechanical friction.

Diese Aufgabe wird durch die in den Ansprüchen 1 und 2 beschriebenen Verfahren gelöst.This object is achieved by the methods described in claims 1 and 2.

Durch zumindest teilweise Einfärbung der wasserlöslichen Umhüllung, können auch leistungsstarke, ästhetisch aber wenig ansprechenden Mittel in wasserlöslichen Verpackungen angeboten werden. Zusätzlich bietet sich die Möglichkeit die einzelnen wasserlöslichen Verpackungen mit Kennzeichen, wie beispielsweise Herkunftshinweisen oder Gefahrenzeichen, zu versehen.By at least partially coloring the water-soluble envelope, it is also possible to offer high-performance, but aesthetically unappealing agents in water-soluble packaging. In addition, there is the option of labeling the individual water-soluble packaging with labels, such as indications of origin or hazard symbols.

Wasserlösliche VerpackungWater soluble packaging

Gegenstand der Erfindung ist ein Verfahren zur Herstellung einer wasserlöslichen Verpackung, die ein flüssiges Wasch- oder Reinigungsmittel und eine wasserlösliche Umhüllung enthält. Die wasserlösliche Umhüllung ist zumindest teilweise mit einer farbgebenden Substanz eingefärbtThe invention relates to a method for producing a water-soluble packaging which contains a liquid detergent or cleaning agent and a water-soluble casing. The water-soluble cover is at least partially colored with a coloring substance

Eine wasserlösliche Verpackung enthält eine wasserlösliche Umhüllung, welche eine geschlossene Struktur ausbildet, die in ihrem Inneren eine oder mehrere Kammern zur Aufnahme eines oder mehrerer Mittel aufweist. Die wasserlösliche Umhüllung wird durch ein wasserlösliches Folienmaterial gebildet.A water-soluble packaging contains a water-soluble casing which forms a closed structure which has one or more chambers in its interior for receiving one or more agents. The water-soluble envelope is formed by a water-soluble film material.

Die wasserlösliche Verpackung kann formstabil oder verformbar ausgebildet sein.The water-soluble packaging can be designed to be dimensionally stable or deformable.

Es ist grundsätzlich jedoch auch möglich und bevorzugt, die wasserlösliche Verpackung als einen nicht formstabilen Behälter, beispielsweise als Beutel auszuformen. Die Form einer derartigen wasserlöslichen Verpackung kann den Gebrauchsgegebenheiten weitgehend angepasst werden. Es kommen beispielsweise verschiedenste Formen wie beispielsweise Schläuche, Kissen, Zylinder, Flaschen oder Scheiben in Frage.In principle, however, it is also possible and preferred to shape the water-soluble packaging as a non-dimensionally stable container, for example as a bag. The shape of such a water-soluble packaging can largely be adapted to the conditions of use. For example, a wide variety of shapes such as hoses, cushions, cylinders, bottles or disks are possible.

Die wasserlösliche Verpackung kann eine oder mehrere Kammern zur Bevorratung eines oder mehrerer Mittel aufweisen. Bevorzugt weist die wasserlösliche Verpackung, zwischen zwei und fünf Kammern auf.The water-soluble packaging can have one or more chambers for storing one or more agents. The water-soluble packaging preferably has between two and five chambers.

Wasserlösliche UmhüllungWater-soluble coating

Die wasserlösliche Umhüllung wird vorzugsweise aus einem wasserlöslichen Folienmaterial, welches ausgewählt ist aus der Gruppe, bestehend aus Polymeren oder Polymergemischen, gebildet. Die Umhüllung kann aus einer oder aus zwei oder mehr Lagen aus dem wasserlöslichen Folienmaterial gebildet werden. Das wasserlösliche Folienmaterial der ersten Lage und der weiteren Lagen, falls vorhanden, kann gleich oder unterschiedlich sein. Besonders bevorzugt sind Folien, die beispielsweise zu Verpackungen wie Schläuchen oder Kissen verklebt und/oder versiegelt werden können, nachdem sie mit einem Mittel befüllt wurden.The water-soluble envelope is preferably formed from a water-soluble film material which is selected from the group consisting of polymers or polymer mixtures. The envelope can be formed from one or from two or more layers of the water-soluble film material. The water-soluble film material of the first layer and the further layers, if any, can be the same or different. Particularly preferred are foils which, for example, can be glued and / or sealed to form packaging such as tubes or pillows after they have been filled with an agent.

Es ist bevorzugt, dass die wasserlösliche Umhüllung Polyvinylalkohol oder ein Polyvinylalkoholcopolymer enthält. Wasserlösliche Umhüllungen, die Polyvinylalkohol oder ein Polyvinylalkoholcopolymer enthalten, weisen eine gute Stabilität bei einer ausreichend hohen Wasserlöslichkeit, insbesondere Kaltwasserlöslichkeit, auf.It is preferred that the water-soluble casing contains polyvinyl alcohol or a polyvinyl alcohol copolymer. Water-soluble casings which contain polyvinyl alcohol or a polyvinyl alcohol copolymer have good stability with sufficiently high water solubility, in particular cold water solubility.

Geeignete wasserlösliche Folien zur Herstellung der wasserlöslichen Umhüllung basieren bevorzugt auf einem Polyvinylalkohol oder einem Polyvinylalkoholcopolymer, dessen Molekulargewicht im Bereich von 10.000 bis 1.000.000 gmol-1, vorzugsweise von 20.000 bis 500.000 gmol-1, besonders bevorzugt von 30.000 bis 100.000 gmol-1 und insbesondere von 40.000 bis 80.000 gmol-1 liegt.Suitable water-soluble films for producing the water-soluble envelope are preferably based on a polyvinyl alcohol or a polyvinyl alcohol copolymer whose molecular weight is in the range from 10,000 to 1,000,000 gmol -1 , preferably from 20,000 to 500,000 gmol -1 , particularly preferably from 30,000 to 100,000 gmol -1 and in particular from 40,000 to 80,000 gmol -1 .

Die Herstellung von Polyvinylalkohol geschieht üblicherweise durch Hydrolyse von Polyvinylacetat, da der direkte Syntheseweg nicht möglich ist. Ähnliches gilt für Polyvinylalkoholcopolymere, die aus entsprechend aus Polyvinylacetatcopolymeren hergestellt werden. Bevorzugt ist, wenn wenigstens eine Lage der wasserlöslichen Umhüllung einen Polyvinylalkohol umfasst, dessen Hydrolysegrad 70 bis 100 Mol-%, vorzugsweise 80 bis 90 Mol-%, besonders bevorzugt 81 bis 89 Mol-% und insbesondere 82 bis 88 Mol-% ausmacht.The production of polyvinyl alcohol is usually done by hydrolysis of polyvinyl acetate, since the direct synthesis route is not possible. The same applies to polyvinyl alcohol copolymers which are produced from polyvinyl acetate copolymers. It is preferred if at least one layer of the water-soluble coating comprises a polyvinyl alcohol whose degree of hydrolysis is 70 to 100 mol%, preferably 80 to 90 mol%, particularly preferably 81 to 89 mol% and in particular 82 to 88 mol%.

Einem zur Herstellung der wasserlöslichen Umhüllung geeignetem Polyvinylalkohol-enthaltendem Folienmaterial kann zusätzlich ein Polymer ausgewählt aus der Gruppe umfassend (Meth)Acrylsäure-haltige (Co)Polymere, Polyacrylamide, Oxazolin-Polymere, Polystyrolsulfonate, Polyurethane, Polyester, Polyether, Polymilchsäure oder Mischungen der vorstehenden Polymere zugesetzt sein. Ein bevorzugtes zusätzliches Polymer sind Polymilchsäuren.A polyvinyl alcohol-containing film material suitable for producing the water-soluble envelope can additionally contain a polymer selected from the group comprising (meth) acrylic acid-containing (co) polymers, polyacrylamides, oxazoline polymers, polystyrene sulfonates, polyurethanes, polyesters, polyethers, polylactic acid or mixtures of the above Polymers may be added. A preferred additional polymer are polylactic acids.

Bevorzugte Polyvinylalkoholcopolymere umfassen neben Vinylalkohol Dicarbonsäuren als weitere Monomere. Geeignete Dicarbonsäure sind Itaconsäure, Malonsäure, Bernsteinsäure und Mischungen daraus, wobei Itaconsäure bevorzugt ist.Preferred polyvinyl alcohol copolymers include, in addition to vinyl alcohol, dicarboxylic acids as further monomers. Suitable dicarboxylic acids are itaconic acid, malonic acid, succinic acid and mixtures thereof, with itaconic acid being preferred.

Ebenfalls bevorzugte Polyvinylalkoholcopolymere umfassen neben Vinylalkohol eine ethylenisch ungesättige Carbonsäure, deren Salz oder deren Ester. Besonders bevorzugt enthalten solche Polyvinylalkoholcopolymere neben Vinylalkohol Acrylsäure, Methacrylsäure, Acrylsäureester, Methacrylsäureester oder Mischungen daraus.Likewise preferred polyvinyl alcohol copolymers include, in addition to vinyl alcohol, an ethylenic one unsaturated carboxylic acid, its salt or its ester. Such polyvinyl alcohol copolymers particularly preferably contain acrylic acid, methacrylic acid, acrylic acid esters, methacrylic acid esters or mixtures thereof in addition to vinyl alcohol.

Es kann bevorzugt sein, dass das Folienmaterial weitere Zusatzstoffe enthält. Das Folienmaterial kann beispielsweise Weichmacher wie Dipropylenglycol, Ethylenglycol, Diethylenglycol, Propylenglycol, Glycerin, Sorbitol, Mannitol oder Mischungen daraus enthalten. Weitere Zusatzstoffe umfassen beispielsweise Freisetzungshilfen, Füllmittel, Vernetzungsmittel, Tenside, Antioxidationsmittel, UV-Absorber, Antiblockmittel, Antiklebemittel oder Mischungen daraus.It can be preferred that the film material contains further additives. The film material can for example contain plasticizers such as dipropylene glycol, ethylene glycol, diethylene glycol, propylene glycol, glycerine, sorbitol, mannitol or mixtures thereof. Further additives include, for example, release aids, fillers, crosslinking agents, surfactants, antioxidants, UV absorbers, antiblocking agents, anti-stick agents or mixtures thereof.

Geeignete wasserlösliche Folien zum Einsatz in den wasserlöslichen Umhüllungen der wasserlöslichen Verpackungen gemäß der Erfindung sind Folien, die von der Firma MonoSol LLC beispielsweise unter der Bezeichnung M8630, C8400 oder M8900 vertrieben werden. Andere geeignete Folien umfassen Folien mit der Bezeichnung Solublon® PT, Solublon® GA, Solublon® KC oder Solublon® KL von der Aicello Chemical Europe GmbH oder die Folien VF-HP von Kuraray.Suitable water-soluble films for use in the water-soluble envelopes of the water-soluble packaging according to the invention are films which are sold by MonoSol LLC, for example under the designation M8630, C8400 or M8900. Other suitable films include films with the designation Solublon® PT, Solublon® GA, Solublon® KC or Solublon® KL from Aicello Chemical Europe GmbH or the films VF-HP from Kuraray.

Die wasserlösliche Umhüllung ist mit einer farbgebenden Substanz, ausgewählt aus der Gruppe bestehend aus Pigmenten, Bläuungsmitteln und/oder Perlglanzmitteln, eingefärbt.The water-soluble envelope is colored with a coloring substance selected from the group consisting of pigments, bluing agents and / or pearlescent agents.

Die farbgebende Substanz ist mittels Bedrucken auf die innere Oberfläche der wasserlöslichen Umhüllung aufgebracht.The coloring substance is applied to the inner surface of the water-soluble cover by means of printing.

Die innere Oberfläche der wasserlöslichen Umhüllung ist zumindest teilweise mit einer farbgebenden Substanz bedruckt. In diesem Zusammenhang ist es insbesondere zu bevorzugen, dass die Bedruckung der wasserlöslichen Umhüllung wasserlöslich oder wasserdispergierbar ist.The inner surface of the water-soluble cover is at least partially printed with a coloring substance. In this context, it is particularly preferable for the printing on the water-soluble cover to be water-soluble or water-dispersible.

Das Aufbringen der farbgebenden Substanz mittels Bedruckung hat den Vorteil, dass die Einfärbung der wasserlöslichen Umhüllung individualisiert, dass heißt entsprechend den Erfordernissen der jeweiligen wasserlöslichen Verpackungen erfolgen kann.Applying the coloring substance by means of printing has the advantage that the coloring of the water-soluble casing is individualized, that is to say it can be carried out in accordance with the requirements of the respective water-soluble packaging.

Grundsätzlich kann jede Form des Bedruckens zur Bedruckung der wasserlöslichen Umhüllung verwendet werden, wie beispielsweise Tiefdruck, Offsetdruck, Siebdruck, Flexodruck, Airbrush, Tintenstrahldruck oder Tampondruck oder beliebige Kombinationen dieser Drucktechnologien. Vorzugsweise erfolgt die Bedruckung mittels Tintenstrahldrucks, da bei dieser Drucktechnologie kein mechanischer Kontakt mit und somit keine mechanische Belastung der wasserlöslichen Umhüllung auftritt. Dasselbe gilt für den Direktdruck mit Piezotechnologie, da dieser auch berührungslos stattfindet.In principle, any form of printing can be used to print the water-soluble cover, such as, for example, gravure printing, offset printing, screen printing, flexographic printing, airbrush, inkjet printing or pad printing or any combination of these printing technologies. The printing is preferably carried out by means of inkjet printing, since with this printing technology there is no mechanical contact with and therefore no mechanical stress on the water-soluble envelope. The same applies to direct printing with piezo technology, as this also takes place without contact.

Die Bedruckung mittels Tintenstrahldrucks oder mittels Direktdrucks mit Piezotechnologie eignet sich insbesondere zur Bedruckung der wasserlöslichen Verpackungen.Printing using inkjet printing or direct printing with piezo technology is suitable in particular for printing on water-soluble packaging.

Die Bedruckung der wasserlöslichen Umhüllung kann mit einer wasserlöslichen Tinte oder einem anderen, geeigneten Medium erfolgen.The water-soluble envelope can be printed with a water-soluble ink or another suitable medium.

Wasserlösliche Tinten sind beispielsweise unter dem Handelsnamen SunChemical Aquadestruct der Fa. SunChemical, Aqua Poly Super Opaque White QW000046 der Fa. Environmental Inks oder Opta Film OPQ White WOL009656 der Fa. Water Ink Technologies Inc. bekannt.Water-soluble inks are known, for example, under the trade name SunChemical Aquadestruct from SunChemical, Aqua Poly Super Opaque White QW000046 from Environmental Inks or Opta Film OPQ White WOL009656 from Water Ink Technologies Inc.

Die Bedruckung kann in Form von Flächen erfolgen, so dass die wasserlösliche Umhüllung zumindest teilweise flächendeckend mit einer farbgebenden Substanz eingefärbt ist. Alternativ kann die Bedruckung in Form von Buchstaben, Zahlen, Symbolen, Ornamenten oder ähnlichem erfolgen.The printing can take place in the form of areas, so that the water-soluble cover is at least partially colored with a coloring substance over the entire area. Alternatively, the printing can be in the form of letters, numbers, symbols, ornaments or the like.

Die wasserlösliche Umhüllung kann in dem Bereich, der eingefärbt ist, transparent, transluzent oder opak ausgebildet sein.The water-soluble envelope can be transparent, translucent or opaque in the area that is colored.

Geeignete Pigmente, welche in dem Medium zum Bedrucken der inneren Oberfläche der wasserlöslichen Umhüllung enthalten sein können, sind beispielsweise Ultramarin oder Titandioxid.Suitable pigments which can be contained in the medium for printing the inner surface of the water-soluble envelope are, for example, ultramarine or titanium dioxide.

Geeignete Bläuungsmittel, welche in dem Medium zum Bedrucken der inneren Oberfläche der wasserlöslichen Umhüllung enthalten sein können, sind beispielsweise Farbstoffe, die in der Color Index (C.I.) Klassifikation als Direct Blue, Direct Red, Direct Violet, Acid Blue, Acid Red, Acid Violet, Basic Blue, Basic Violet oder Basic Red bezeichnet werden. Alternativ können auch polymere Farbstoffe wie sie beispielsweise von der Firma Milliken unter der Bezeichnung "Liquitint®" erhältlich sind, eingesetzt werden. Auch Pigmente wie Ultramarin eignen sich als Bläuungsmittel.Suitable bluing agents which can be contained in the medium for printing the inner surface of the water-soluble envelope are, for example, dyes which are classified in the Color Index (CI) as Direct Blue, Direct Red, Direct Violet, Acid Blue, Acid Red, Acid Violet , Basic Blue, Basic Violet or Basic Red. Alternatively, it is also possible to use polymeric dyes such as those available, for example, from Milliken under the name “Liquitint®”. Pigments such as ultramarine are also suitable as bluing agents.

Besonders bevorzugte Bläuungsmittel sind Basic Violet 10, Ultramarin, Liquitint® Blue HP oder Verbindungen der folgenden Formel:

Figure imgb0001
worin jedes R1 und R2 unabhängig voneinander ausgewählt ist aus
R, -[(CH2CR'HO)x(CH2CR"HO)yH] und Mischungen daraus, worin jedes R unabhängig voneinander ausgewählt ist aus H, linearen oder verzweigten C1-C4-Alkylgruppen, Benzyl und Mischungen daraus; jedes R' unabhängig voneinander ausgewählt ist aus H, CH2O(CH2CH2O)zH und Mischungen daraus und jedes R" unabhängig voneinander ausgewählt ist aus H, CH3, CH2O(CH2CH2O)zH und Mischungen daraus; worin x + y < 5; y ≥ 1 und z = 0 bis 5 ist.Particularly preferred bluing agents are Basic Violet 10, Ultramarine, Liquitint® Blue HP or compounds of the following formula:
Figure imgb0001
 wherein each R 1 and R 2 is independently selected from
R, - [(CH 2 CR'HO) x (CH 2 CR "HO) y H] and mixtures thereof, wherein each R is independently selected from H, linear or branched C 1 -C 4 -alkyl groups, benzyl and mixtures thereof; each R 'is independently selected from H, CH 2 O (CH 2 CH 2 O) z H and mixtures thereof and each R "is independently selected from H, CH 3 , CH 2 O (CH 2 CH 2 O ) z H and mixtures thereof; wherein x + y <5; y ≥ 1 and z = 0 to 5.

Perlglanzmittel, die in dem Medium zum Bedrucken der inneren Oberfläche der wasserlöslichen Umhüllung enthalten sein können, sind Glimmer, Metalloxid beschichteter Glimmer, Silica beschichteter Glimmer, Bismutoxychlorid beschichteter Glimmer, Bismutoxychlorid, Glass, Metalloxid beschichteter Glass, Polyester-Glitter und/oder Metallglitter.Pearlescent agents that may be included in the medium for printing the inner surface of the water-soluble envelope are mica, metal oxide coated mica, silica coated mica, bismuth oxychloride coated mica, bismuth oxychloride, glass, metal oxide coated glass, polyester glitter and / or metal glitter.

Es ist ferner möglich, dass sich eine Mehrzahl von unterschiedlich eingefärbten Bereichen der inneren Oberfläche der wasserlöslichen Umhüllung befinden, wobei sich die unterschiedlichen Bereiche bevorzugt in der Art der Farbgebung und/oder voneinander hinsichtlich der Bedruckung und/oder in der wasserlöslichen Umhüllung enthaltenen farbgebenden Substanz unterscheiden.It is also possible that there are a plurality of differently colored areas of the inner surface of the water-soluble envelope, the different areas preferably differing in the type of coloring and / or from one another with regard to the printing and / or the coloring substance contained in the water-soluble envelope .

Im Rahmen der vorliegenden Anmeldung bezeichnet der Begriff "innere Oberfläche der wasserlöslichen Umhüllung", die Oberfläche, die in Kontakt mit dem von der wasserlöslichen Umhüllung umschlossenen Mittel ist.In the context of the present application, the term “inner surface of the water-soluble envelope” denotes the surface which is in contact with the agent enclosed by the water-soluble envelope.

Mittel, insbesondere flüssige, gelförmige oder feste Wasch- oder Reinigungsmittel zur Bevorratung in der wasserlöslichen VerpackungAgents, in particular liquid, gel-like or solid washing or cleaning agents for storage in the water-soluble packaging

Neben der wasserlöslichen Umhüllung weist die wasserlösliche Verpackung ein flüssiges Wasch- oder Reinigungsmittel auf.In addition to the water-soluble envelope, the water-soluble packaging has a liquid washing or cleaning agent.

In einer Ausführungsform weist die wasserlösliche Verpackung eine Kammer zur Aufnahme des Mittels auf.In one embodiment, the water-soluble packaging has a chamber for receiving the agent.

In einer weiteren Ausführungsform weist die wasserlösliche Verpackung zwei Kammern auf.In a further embodiment, the water-soluble packaging has two chambers.

Weist die wasserlösliche Verpackung drei Kammern auf, können diese alle jeweils ein flüssiges Mittel enthalten.If the water-soluble packaging has three chambers, these can each contain a liquid agent.

Die flüssigen Wasch- oder Reinigungsmittel, die in den unterschiedlichen Kammern einer wasserlöslichen Verpackung enthalten sind, können dieselbe Zusammensetzung aufweisen. Vorzugsweise weisen die Mittel in einer wasserlöslichen Verpackung mit mindestens zwei Kammern Zusammensetzungen auf, die sich mindestens in einem Inhaltsstoff oder sich mindestens im Gehalt eines Inhaltsstoffes unterscheiden.The liquid washing or cleaning agents that are contained in the different chambers of a water-soluble packaging can have the same composition. In a water-soluble packaging with at least two chambers, the agents preferably have compositions which differ in at least one ingredient or at least in the content of one ingredient.

Das flüssige Wasch- oder Reinigungsmittel enthält Inhaltsstoffe, die die strukturelle Integrität der wasserlöslichen Umhüllung nicht zerstören. Das flüssige Wasch- oder Reinigungsmittel kann einen oder mehrere Stoffe aus der Gruppe der Tenside, Gerüststoffe, Bleichmittel, Bleichaktivatoren, Bleichkatalysatoren, Enzyme, Enzymstabilisatoren, Elektrolyte, pH-Stellmittel, Parfüme, Parfümträger, Fluoreszenzmittel, Farbstoffe, Hydrotope, Schauminhibitoren, Silikonöle, Antiredepositionsmittel, Vergrauungsinhibitoren, Einlaufverhinderer, Knitterschutzmittel, Farbübertragungsinhibitoren, antimikrobiellen Wirkstoffe, nicht-wässrigen Lösungsmittel, Germizide, Fungizide, Antioxidantien, Konservierungsmittel, Korrosionsinhibitoren, Antistatika, Bittermittel, Bügelhilfsmittel, Phobier- und Imprägniermittel, Trübungsmittel, Haut-pflegende Wirkstoffe, Quell- und Schiebefestmittel, weichmachenden Komponenten, Füllstoffe sowie UV-Absorber enthalten.The liquid detergent or cleaning agent contains ingredients that do not destroy the structural integrity of the water-soluble coating. The liquid detergent or cleaning agent can contain one or more substances from the group of surfactants, builders, bleaches, bleach activators, bleach catalysts, enzymes, enzyme stabilizers, electrolytes, pH adjusters, perfumes, perfume carriers, fluorescent agents, dyes, hydrotopes, foam inhibitors, silicone oils, anti-redeposition agents Antimicrobial agents, antioxidants, antioxidants, preservatives, corrosion inhibitors, antistatic agents, bitter agents, ironing aids, phobic and impregnating agents, anti-slip agents, anti-slip agents, skin-proofing agents, anti-slip agents, opacifiers Contain plasticizing components, fillers and UV absorbers.

Die flüssigen Wasch- oder Reinigungsmittel können Wasser enthalten, wobei der Gehalt an Wasser weniger als 10 Gew.-% und mehr bevorzugt weniger als 8 Gew.-%, jeweils bezogen auf das gesamte flüssige Wasch- oder Reinigungsmittel, beträgt.The liquid washing or cleaning agents can contain water, the water content being less than 10% by weight and more preferably less than 8% by weight, based in each case on the total liquid washing or cleaning agent.

Verfahren zur Herstellung einer wasserlöslichen VerpackungProcess for the production of a water-soluble package

Es existieren mehrere Möglichkeiten zur Herstellung der erfindungsgemäßen wasserlöslichen Verpackung. Neben dem vertikalen Form-Füll-Siegel-Verfahren bietet sich insbesondere auch der Einsatz eines horizontalen Form-Füll-Siegel-Verfahrens an.There are several ways of producing the water-soluble packaging according to the invention. In addition to the vertical form-fill-seal process, the use of a horizontal form-fill-seal process is particularly suitable.

Ein Gegenstand der Anmeldung ist ein Verfahren zur Herstellung einer wasserlöslichen Verpackung, die ein flüssiges Wasch- oder Reinigungsmittel und eine zumindest teilweise mit einer farbgebenden Substanz, ausgewählt aus der Gruppe bestehend aus Pigmenten, Bläuungsmitteln, Perlglanzmitteln und Mischungen daraus, eingefärbte, aus wasserlöslichem Folienmaterial gebildete, wasserlösliche Umhüllung enthält, umfassend die Schritte:

  1. a) Bereitstellen einer ersten wasserlöslichen Folienbahn,
  2. b) Bedrucken der ersten wasserlöslichen Folienbahn mit einem Medium, das die farbgebende Substanz enthält,
  3. c) Ausbilden wenigstens einer Kavität in der ersten wasserlöslichen Folienbahn,
  4. d) Befüllen der wenigstens einen Kavität mit einem Produkt, wobei das Produkt ein flüssiges Wasch- oder Reinigungsmittel ist, und
  5. e) Verschließen der Kavität mit einer zweiten wasserlöslichen Folienbahn,
wobei die Bedruckung der ersten wasserlöslichen Folienbahn derart erfolgt, dass sich die farbgebende Substanz auf der inneren Oberfläche der wasserlöslichen Umhüllung befindet.One subject matter of the application is a method for producing a water-soluble packaging which contains a liquid detergent or cleaning agent and an at least partially colored substance selected from the group consisting of pigments, bluing agents, pearlescent agents and mixtures thereof, formed from water-soluble film material , water-soluble coating, comprising the steps:
  1. a) providing a first water-soluble film web,
  2. b) printing the first water-soluble film web with a medium that contains the coloring substance,
  3. c) forming at least one cavity in the first water-soluble film web,
  4. d) filling the at least one cavity with a product, the product being a liquid detergent or cleaning agent, and
  5. e) closing the cavity with a second water-soluble film web,
wherein the printing of the first water-soluble film web takes place in such a way that the coloring substance is located on the inner surface of the water-soluble cover.

Ein weiterer Gegenstand der Erfindung ist ein Verfahren zur Herstellung einer wasserlöslichen Verpackung, die ein flüssiges Wasch- oder Reinigungsmittel und eine zumindest teilweise mit einer farbgebenden Substanz, ausgewählt aus der Gruppe bestehend aus Pigmenten, Bläuungsmitteln, Perlglanzmitteln und Mischungen daraus, eingefärbte, aus wasserlöslichem Folienmaterial gebildete, wasserlösliche Umhüllung enthält, umfassend die Schritte:

  1. a) Ausbilden wenigstens einer Kavität in einer ersten wasserlöslichen Folienbahn,
  2. b) Befüllen der wenigstens einen Kavität mit einem Produkt, wobei das Produkt ein flüssiges Wasch- oder Reinigungsmittel ist,
  3. c) Bereitstellen einer zweiten wasserlöslichen Folienbahn,
  4. d) Bedrucken der zweiten wasserlöslichen Folienbahn mit einer Tinte oder einem Medium, die/das die farbgebende Substanz enthält und
  5. e) Verschließen der Kavität mit der zweiten wasserlöslichen Folienbahn,
wobei die Bedruckung der zweiten wasserlöslichen Folienbahn derart erfolgt, dass sich die farbgebende Substanz auf der inneren Oberfläche der wasserlöslichen Umhüllung befindet.Another object of the invention is a method for producing a water-soluble Packaging which contains a liquid detergent or cleaning agent and an at least partially colored, water-soluble envelope formed from water-soluble film material with a coloring substance selected from the group consisting of pigments, bluing agents, pearlescent agents and mixtures thereof, comprising the steps:
  1. a) forming at least one cavity in a first water-soluble film web,
  2. b) filling the at least one cavity with a product, the product being a liquid detergent or cleaning agent,
  3. c) providing a second water-soluble film web,
  4. d) printing the second water-soluble film web with an ink or a medium which contains the coloring substance and
  5. e) closing the cavity with the second water-soluble film web,
wherein the second water-soluble film web is printed in such a way that the coloring substance is located on the inner surface of the water-soluble cover.

Diese Ausführungsformen haben den Vorteil, dass jeweils das Aufbringen des Druckbilds auf die Folie erfolgt, während sie noch als Folienbahn vorliegt und noch plan ist. Dies führt zu einem guten Druckbild.These embodiments have the advantage that the printed image is applied to the film while it is still in the form of a film web and is still flat. This leads to a good print image.

Dem Druckvorgang kann sich optional ein Trocknungsverfahren anschließen, bei dem durch Auf- oder Überblasen von temperiertem Gas, Durchlaufen eines Trocknungsofens oder Bestrahlung mit Infrarotlicht das in der Tinte oder in dem Medium, die/das die farbgebende Substanz enthält, enthaltene Lösungsmittel verdampft/entfernt wird. Alternativ kann sich dem Druckvorgang ein Härtungsverfahren mit UV-Licht anschließen.The printing process can optionally be followed by a drying process in which the solvent contained in the ink or in the medium containing the coloring substance is evaporated / removed by blowing on or overblown tempered gas, passing through a drying oven or irradiation with infrared light . Alternatively, the printing process can be followed by a curing process with UV light.

Claims (4)

  1. A method for producing a water-soluble packaging which contains a liquid washing or cleaning agent and a water-soluble wrapping which is at least partially colored with a coloring substance selected from the group consisting of pigments, bluing agents, pearlescing agents and mixtures thereof and is made of water-soluble film material, comprising the steps of:
    a) providing a first water-soluble film web,
    b) printing the first water-soluble film web with a medium that contains the coloring substance,
    c) forming at least one cavity in the first water-soluble film web,
    d) filling the at least one cavity with a product, wherein the product is a liquid washing or cleaning agent, and
    e) sealing the cavity with a second water-soluble film web,
    wherein the printing of the first water-soluble film web takes place in such a way that the coloring substance is located on the inner surface of the water-soluble wrapping.
  2. A method for producing a water-soluble packaging which contains a liquid washing or cleaning agent and a water-soluble wrapping which is at least partially colored with a coloring substance selected from the group consisting of pigments, bluing agents, pearlescing agents and mixtures thereof and is made of water-soluble film material, comprising the steps of:
    a) forming at least one cavity in a first water-soluble film web,
    b) filling the at least one cavity with a product, wherein the product is a liquid washing or cleaning agent,
    c) providing a second water-soluble film web,
    d) printing the second water-soluble film web with a medium that contains the coloring substance and
    e) sealing the cavity with the second water-soluble film web,
    wherein the printing of the second water-soluble film web takes place in such a way that the coloring substance is located on the inner surface of the water-soluble wrapping.
  3. The method according to one of claims 1 to 2, characterized in that the colored region of the water-soluble wrapping is transparent, translucent or opaque.
  4. The method according to one of claims 1 to 3, characterized in that the water-soluble packaging has between two and five chambers.
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