EP0798217A1 - Method for applying wrap-around labels to containers - Google Patents

Method for applying wrap-around labels to containers Download PDF

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Publication number
EP0798217A1
EP0798217A1 EP97102483A EP97102483A EP0798217A1 EP 0798217 A1 EP0798217 A1 EP 0798217A1 EP 97102483 A EP97102483 A EP 97102483A EP 97102483 A EP97102483 A EP 97102483A EP 0798217 A1 EP0798217 A1 EP 0798217A1
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EP
European Patent Office
Prior art keywords
label
label section
container
undulation
section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP97102483A
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German (de)
French (fr)
Other versions
EP0798217B1 (en
Inventor
Georg Schwinn
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.)
Mondi Gronau GmbH
Original Assignee
M&W Verpackungen Mildenberger and Willing GmbH
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Publication of EP0798217A1 publication Critical patent/EP0798217A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65C—LABELLING OR TAGGING MACHINES, APPARATUS, OR PROCESSES
    • B65C9/00—Details of labelling machines or apparatus
    • B65C9/0015—Preparing the labels or articles, e.g. smoothing, removing air bubbles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65C—LABELLING OR TAGGING MACHINES, APPARATUS, OR PROCESSES
    • B65C3/00—Labelling other than flat surfaces
    • B65C3/06—Affixing labels to short rigid containers
    • B65C3/08—Affixing labels to short rigid containers to container bodies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1007—Running or continuous length work
    • Y10T156/1016—Transverse corrugating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1028—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina by bending, drawing or stretch forming sheet to assume shape of configured lamina while in contact therewith
    • Y10T156/1033—Flexible sheet to cylinder lamina

Definitions

  • the invention relates to a method for wrap-around labeling of cylindrical or prismatic containers.
  • a tube is formed that is made of an elastic polyethylene. Before labeling, the tube section is stretched and pulled over the outside of the bottle. Due to its restoring force, it clings to the outside of the container.
  • wrap-around labeling a label section corresponding to a print repeat is cut to length, this label section is wrapped around the container and glued to the overlap of the label section edges with a hot-melt adhesive, the outer side being preferably glued to the inner side.
  • a hot-melt adhesive primarily films made of oriented polypropylene (OPP) are used, sometimes also films made of polyethylene. Wrap-around labeling is currently more widespread than stretch-sleeve labeling.
  • the setting time required for the hot melt or other adhesive is achieved in that there is only a slight tension on the bond point at the edges of the label section due to the retarded retraction of the undulation, which is smaller than that for tearing off force required for the adhesive bond.
  • the material can be adjusted in such a way that a residual elasticity remains, which tightens the label around the outside of the labeled container enough to also prevent a slight shrinkage the tank by relieving the internal pressure.
  • Label sections which consist of a thermoplastic styrene-butadiene sequence polymer which has a retarding regression, with a sufficient residual tension remaining. Label sections can also be produced from a film material consisting of polyolefins which have been obtained using catalytic polymerization processes with the aid of metallocene catalysts.
  • Hot melt adhesives are understood to mean hot melt adhesives, in particular saturated polyesters, ethylene-vinyl acetate copolymers and polyamide resins.
  • hot melt adhesives in particular saturated polyesters, ethylene-vinyl acetate copolymers and polyamide resins.
  • an undulation is provided in a change in length of 110 to 150 ° of the original length, the duration of the retarded regression to the original length preferably being between 90 msec and 1 sec should be.
  • the plastic film web consists of a three-layer, co-extruded film layer. This consists of a semi-elastic film in the middle layer based on an acrylic acid copolymer, 100 ⁇ m thick, which is covered on both sides with an outer layer made of polypropylene, each with a thickness of 20 ⁇ m, that of the film as a whole Give transparency and rigidity.
  • the elastic inner layer can also be a styrene-butadiene sequence polymer.
  • the film is partially provided with a 10 ⁇ m thick polyethylene layer as a hot melt.
  • the label sections are sent through a pair of gear rollers at room temperature; as they pass through, they receive an undulation which runs transversely to the longitudinal direction of the label when the length changes to 125% of the original length, i.e. a change in length of 25%.
  • the label sections are then placed around the outside of the bottle within the filling cycle of 0.1 sec, the label sections being initially undulated strongly.
  • the hot-melt layer is stamped on the overlapping edges of the label sections melted at a temperature of 120 ° C.
  • the delayed retraction of the undulation continues, with only very slight tensions acting on the bond point; however, the tensions are sufficient to hold the label around the outside of the bottle.
  • the process of setting and cooling the bond takes less time than the retarded regression of the undulation (0.2 versus 1.0 sec). During this time, the PET bottles are stopped in a transport waiting station.
  • the dimensions of the label and the adhesive areas are dimensioned so that a residual tension remains in the label.
  • the plastic film web consists of a single-layer, flat-extruded printed film, which is made of a 20 ⁇ m thick semi-elastic polypropylene, which was obtained by a polymerization process, in which metallocenes were used as a catalyst.
  • the label sections are sent through a pair of gear rollers at room temperature; as they pass through, they receive an undulation which runs transversely to the longitudinal direction of the label when the length changes to 150% of the original length, i.e. a change in length of 50%.
  • the label sections are then placed around the outside of the container within the filling cycle of 0.25 seconds, the label sections being initially undulated strongly.
  • a glue is applied by applying adhesive with a polymethyl methacrylate and pressing the edges of the adhesive together.
  • the delayed retraction of the undulation continues, with only very slight tensions acting on the bond point; however, the tensions are sufficient to hold the label around the outside of the bottle.
  • the process of setting the bond takes less time than the retarded regression of the undulation (0.3 compared to 0.75 sec). During this time, the containers are stopped in a transport waiting station.
  • the dimensions of the label and the adhesive areas are dimensioned such that a residual tension remains in the label. All in all, it should be noted that the process allows the adhesive to set without tension, and because of the retarded undulation there is so much tension on the label that it is firmly attached to the container and does not fall off even with an empty bottle due to the residual shrinkage force despite the smaller bottle size.

Landscapes

  • Labeling Devices (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)

Abstract

The invention relates to a method for attaching wrap-around labels to cylindrical or prismatic containers starting with cutting of a section of a label from a suitable foil material. Then, the label section is shaped or deformed, maximally to the limit of what is reversible for the material being used, at a time immediately prior to the application of the label section onto the exterior of the container. The undulated label section is placed around the exterior of the container so that the edges of the label are overlapping and an adhesion or gluing process is initiated, for example, by reaction and/or heating. Reforming of the shaped or deformed label section is retarded until the label section rests against the exterior of the container along with the permitting the simultaneous progress of the adhesive process to be completed. By proper selection of material and with sufficient deforming of the label section, reforming of the deformed label section is also completed simultaneously with or shortly after the adhesive process is completed.

Description

Die Erfindung betrifft ein Verfahren zum Wrap-around-Etikettieren von zylindrischen oder prismatischen Behältern.The invention relates to a method for wrap-around labeling of cylindrical or prismatic containers.

Für die auf dem Markt befindlichen Polyester-Flaschen (PET-Flaschen) für stille und kohlensäurehaltige Getränke werden im zunehmenden Maße Etiketten eingesetzt, die aus Polyolefin-Folien bestehen. Dabei werden für das Etikettieren üblicherweise zwei Verfahren verwendet, nämlich das sogenannte

  • Stretch-Sleeve-Etikettieren
    und das
  • Wrap-around-Etikettieren.
For the polyester bottles on the market (PET bottles) for still and carbonated drinks, labels are increasingly being used which consist of polyolefin films. Two methods are usually used for labeling, namely the so-called
  • Stretch sleeve labeling
    and the
  • Wrap around labeling.

Beim Stretch-Sleeve-Etikettieren wird ein Schlauch geformt, der aus einem elastischen Polyäthylen besteht. Der Schlauchabschnitt wird vor dem Etikettieren gedehnt und über die Flaschenaußenseite gestülpt und gezogen. Aufgrund seiner Rückstellkraft schmiegt er sich an die Außenseite des Behälters an.With stretch sleeve labeling, a tube is formed that is made of an elastic polyethylene. Before labeling, the tube section is stretched and pulled over the outside of the bottle. Due to its restoring force, it clings to the outside of the container.

Beim Wrap-around-Etikettieren wird ein einem Druckrapport entsprechender Etikettenabschnitt abgelängt, dieser Etikettenabschnitt um den Behälter herumgeschlagen und an der Überlappung der Etikettenabschnitt-Ränder mit einem Hotmelt-Klebstoff verklebt, wobei vorzugsweise die Außen- gegen die Innenseite verklebt wird. Für das Wrap-around-Etikettieren werden vor allem Folien aus orientierten Polypropylenen (OPP), teilweise auch Folien aus Poiyäthylenen, eingesetzt. Das Wrap-around-Etikettieren ist zur Zeit verbreiteter als das Stretch-Sleeve-Etikettieren.In the case of wrap-around labeling, a label section corresponding to a print repeat is cut to length, this label section is wrapped around the container and glued to the overlap of the label section edges with a hot-melt adhesive, the outer side being preferably glued to the inner side. For wrap-around labeling, primarily films made of oriented polypropylene (OPP) are used, sometimes also films made of polyethylene. Wrap-around labeling is currently more widespread than stretch-sleeve labeling.

Beim Wrap-around-Etikettieren müssen die Etiketten mit einer gewissen inneren Spannung aufgebracht werden, die auch nach dem Etikettieren aufrechterhalten bleibt. Die wrap-around-etikettierten Flaschen würden sonst bei einer nachlassenden Spannung das Etikett verlieren. Außerdem wurde beobachtet, daß bei hohen Taktzahlen von 600 bis 700 Takten und den damit verbundenen kurzen Zeiten, die für das Abbinden eines Klebstoffes zur Verfügung stehen, die Klebverbindungen nicht ausreichend abbinden, sondern sich wieder lösen, falls die Folie unter Spannung verklebt wird. Man ist daher gezwungen, auf längere Taktzeiten zurückzufahren.With wrap-around labeling, the labels must be applied with a certain internal tension, which is maintained even after labeling. The wrap-around labeled bottles would otherwise lose the label if the tension decreased. It was also observed that at high cycle numbers of 600 to 700 cycles and the associated short times that are available for the setting of an adhesive, the adhesive connections do not set sufficiently, but detach again if the film is bonded under tension. One is therefore forced to go back to longer cycle times.

Es stellt sich demnach die Aufgabe, ein Verfahren zum Wrap-around-Etikettieren, insbesondere von PET-Flaschen, anzugeben, bei dem die vorgenannten Nachteile nicht auftreten, und insbesondere kürzere Taktzeiten trotz unveränderter Abbindeseiten des Klebstoffes erreicht werden können.It is therefore the task of specifying a method for wrap-around labeling, in particular of PET bottles, in which the aforementioned disadvantages do not occur, and in particular shorter cycle times can be achieved despite unchanged setting sides of the adhesive.

Diese Aufgabe wird gelöst bei einem Verfahren zum Wrap-around-Etikettieren von zylindrischen oder prismatischen Behältern, insbesondere aus PET, mit folgenden Verfahrensschritten:

  • Ablängen eines einem Druckrapport entsprechenden Etikettenabschnittes von einer bedruckten, reversibel dehnbaren Kunststoffolien-Bahn mit einer durchgängigen oder rapportartig verteilten Klebstoffbeschichtung, letztere insbesondere aus Hotmelt-Klebstoff;
  • Ondulieren des Etikettenabschnittes maximal bis zur Grenze der Reversibilität zeitlich unmittelbar vor dem Aufbringen des Etikettenabschnittes auf die Behälter-Außenseite,
  • Umlegen des ondulierten Etikettenabschnittes um die Behälter-Außenseite mit sich überlappenden Etikettenabschnitt-Rändern und Einleitung des Verklebevorganges durch Reaktion und/oder Erhitzen;
  • retardiertes Rückbildenlassen der Ondulation bis zur Anlage des Etikettenabschnittes an die Behälter-Außenseite bei gleichzeitigem Ablaufenlassen des Verklebevorganges bis zu dessen Beendigung,
  • wobei die retardierte Rückbildung der Ondulation gleichzeitig oder kurze Zeit später als die Beendigung des Verklebvorganges terminiert ist.
This object is achieved in a method for wrap-around labeling of cylindrical or prismatic containers, in particular made of PET, with the following method steps:
  • Cutting a label section corresponding to a print repeat from a printed, reversibly stretchable plastic film web with a continuous or repeat-like distributed adhesive coating, the latter in particular made of hot melt adhesive;
  • Undulation of the label section at most up to the limit of reversibility immediately before the label section is applied to the outside of the container,
  • Folding the undulated label section around the outside of the container with overlapping label section edges and initiating the bonding process by reaction and / or heating;
  • allowing the undulation to retard until the label section touches the outside of the container while simultaneously allowing the gluing process to continue until it ends,
  • the delayed regression of the undulation is terminated at the same time or a short time later than the end of the bonding process.

Unter dem Begriff "Ablängen eines einem Druckrapport entsprechenden Etikettenabschnittes" soll auch verstanden werden, die Etiketten aus einer Folie entsprechend auszustanzen.The term "cutting to length a label section corresponding to a print repeat" is also to be understood to punch the labels out of a film accordingly.

Mit dem vorgenannten Verfahren gemäß Patentanspruch 1 wird damit die für den Hotmelt- oder anderen Klebstoff erforderliche Abbindezeit erreicht, indem durch das retardierte Rückbildenlassen der Ondulation nur eine geringe Spannung auf die Verklebungsstelle an den Etikettenabschnitt-Rändern vorhanden ist, die kleiner ist als die zum Abreißen der Verklebungsverbindung erforderliche Kraft. Andererseits kann das Material so eingestellt werden, daß eine Rest-Elastizität verbleibt, die das Etikett um die Außenseite des etikettierten Behälters genügend spannt, um auch eine geringe Schrumpfung des Behälters durch Nachlassen des Innendruckes auszugleichen.With the aforementioned method according to claim 1, the setting time required for the hot melt or other adhesive is achieved in that there is only a slight tension on the bond point at the edges of the label section due to the retarded retraction of the undulation, which is smaller than that for tearing off force required for the adhesive bond. On the other hand, the material can be adjusted in such a way that a residual elasticity remains, which tightens the label around the outside of the labeled container enough to also prevent a slight shrinkage the tank by relieving the internal pressure.

Damit wird erreicht, daß, obwohl keine längeren Abbindezeiten des Hotmelt-Bindeklebstoffes erforderlich sind, trotzdem eine sichere Verbindung der Verklebung im Bereich der Etikettenäbschnitt-Ränder gegeben ist.This ensures that, although no longer setting times of the hot melt binding adhesive are required, there is nevertheless a secure connection of the bond in the area of the label cut edges.

Folien, die für ein Verfahren der vorgenannten Art geeignet sind, sind dem Fachmann bekannt. Insbesondere eignen sich hier Etikettenabschnitte, die aus einem thermoplastischen Styrol-Butadien-Sequenzpolymer bestehen, das eine retardierende Rückbildung aufweist, wobei eine ausreichende Rest-Spannung verbleibt. Es lassen sich auch Etikettenabschnitte aus einem Folienmaterial herstellen, das aus Polyolefinen besteht, die mithilfe katalytischer Polymerisationsverfahren unter Zuhilfenahme von Metallocen-Katalysatoren gewonnen wurden.Films which are suitable for a process of the aforementioned type are known to the person skilled in the art. Particularly suitable here are label sections which consist of a thermoplastic styrene-butadiene sequence polymer which has a retarding regression, with a sufficient residual tension remaining. Label sections can also be produced from a film material consisting of polyolefins which have been obtained using catalytic polymerization processes with the aid of metallocene catalysts.

Zum Ondulieren eignen sich an sich bekannte Wellenprägemaschinen oder Vorrichtungen, die ein "Ondulieren" durch Dehnen in verschiedenen Konfigurationen herstellen, beispielsweise auch in einer Chevron-Ondulation oder durch Dehnen in bestimmten abgeschlossenen Bereichen.Known wave embossing machines or devices which produce an "undulating" by stretching in various configurations, for example also in a chevron undulation or by stretching in certain closed areas, are suitable for undulating.

Unter Hotmelt-Klebstoffen werden Schmelzklebstoffe verstanden, insbesondere gesättigte Polyester, EthylenVinylacetat-Copolymerisate und Polyamidharze. In Bezug auf Anwendung und Merkmale wird verwiesen auf das Buch von Gerd HABENICHT, KLEBEN, Grundlagen, Technologie, Anwendung, 2. Aufl., Springer-Verlag, Berlin, 1990, Seiten 139-147.Hot melt adhesives are understood to mean hot melt adhesives, in particular saturated polyesters, ethylene-vinyl acetate copolymers and polyamide resins. With regard to application and features, reference is made to the book by Gerd HABENICHT, KLEBEN, Fundamentals, Technology, Application, 2nd edition, Springer-Verlag, Berlin, 1990, pages 139-147.

Entsprechend den Erfordernissen wird eine Ondulation in einer Längenänderung von 110 bis 150° der Ursprungslänge vorgesehen, wobei vorzugsweise die Zeitdauer der retardierten Rückbildung auf die Ursprungslänge zwischen 90 msec und 1 sec liegen sollte.According to the requirements, an undulation is provided in a change in length of 110 to 150 ° of the original length, the duration of the retarded regression to the original length preferably being between 90 msec and 1 sec should be.

Ausführung und Beispiele der Erfindung werden nachfolgend beschrieben:Execution and examples of the invention are described below:

Beispiel 1example 1

Um zylindrische PET-Limonadenflaschen mit einem Durchmesser von 80 mm mit Etiketten zu versehen, werden 255 mm lange Etikettenabschnitte von einer bedruckten Kunstoffolien-Bahn rapportgemäß abgeschnitten. Die Kunststoffolien-Bahn besteht aus einer dreischichtigen, coextrudierten Folienlage. Diese bsteht aus einer in der Mittellage liegenden semi-elastischen Folie auf der Basis einer Acrysäure-Coply,eren von 100µm Dicke, die auf beiden Seiten belegt ist mit je einer Außenlage aus Polypropylen, mit einer Dicke von jeweils 20 µm, die der Folie insgesamt Transparenz und Steifigkeit verleihen.In order to label cylindrical PET lemonade bottles with a diameter of 80 mm, 255 mm long label sections are cut off in a repeat from a printed plastic film web. The plastic film web consists of a three-layer, co-extruded film layer. This consists of a semi-elastic film in the middle layer based on an acrylic acid copolymer, 100 µm thick, which is covered on both sides with an outer layer made of polypropylene, each with a thickness of 20 µm, that of the film as a whole Give transparency and rigidity.

Die elastische Innenlage kann auch ein Styrol-ButadienSequenzpolymer sein.The elastic inner layer can also be a styrene-butadiene sequence polymer.

Im Bereich der Überlappnaht ist die Folie mit einer 10 µm dicken Polyethylen-Schicht als Hotmelt partiell versehen.In the area of the lap seam, the film is partially provided with a 10 µm thick polyethylene layer as a hot melt.

Die Etikettenabschnitte werden bei Raumtemperatur durch ein Zahnrad-Walzenpaar geschickt; beim Durchlaufen erhalten sie eine quer zur Etiketten-Längserstreckung verlaufende Ondulation bei einer Längenänderung auf 125% der Ursprungslänge, d.h. eine Längenänderung um 25%.The label sections are sent through a pair of gear rollers at room temperature; as they pass through, they receive an undulation which runs transversely to the longitudinal direction of the label when the length changes to 125% of the original length, i.e. a change in length of 25%.

Die Etikettenabschnitte werden sodann innerhalb des Fülltaktes von 0,1 sec um die Flaschenaußenseite herumgelegt, wobei die Etikettenabschnitte zunächst noch stark onduliert sind. An den sich überlappenden Etikettenabschnitträndern wird durch einen Stempel die Hotmeltschicht bei einer Temperatur von 120°C zum Schmelzen gebracht. Das retardierte Zurückgehen der Ondulation setzt sich fort, wobei nur sehr geringe Spannungen auf die Verklebungsstelle wirken; die Spannungen sind aber ausreichend, um das Etikett um die Außenseite der Flasche zu halten. Der Vorgang des Abbindens und Abkühlens der Verklebung nimmt weniger Zeit in Anspruch als die retardierte Rückbildung der Ondulation (0,2 gegenüber 1,0 sec). Während dieser Zeit werden die PET-Flaschen in einer Transport-Wartestation angehalten. Die Abmessungen des Etikettes und der Verklebungsbereiche sind so bemessen, daß eine Restspannung im Etikett verbleibt.The label sections are then placed around the outside of the bottle within the filling cycle of 0.1 sec, the label sections being initially undulated strongly. The hot-melt layer is stamped on the overlapping edges of the label sections melted at a temperature of 120 ° C. The delayed retraction of the undulation continues, with only very slight tensions acting on the bond point; however, the tensions are sufficient to hold the label around the outside of the bottle. The process of setting and cooling the bond takes less time than the retarded regression of the undulation (0.2 versus 1.0 sec). During this time, the PET bottles are stopped in a transport waiting station. The dimensions of the label and the adhesive areas are dimensioned so that a residual tension remains in the label.

Beispiel 2Example 2

Um zylindrische Arzneimittelfläschchen aus PE mit einem Umfang von 200 mm mit Etiketten zu versehen, werden 210 mm lange Etikettenabschnitte von einer bedruckten Kunstoffolien-Bahn rapportgemäß abgeschnitten. Die Kunststoffolien-Bahn besteht aus einer einschichtigen, flachextrudierten bedruckten Folie, die aus einem 20 µm dicken semi-elastischen Polypropylen, das mit einem Polymerisierungs-Verfahren gewonnen wurde, bei dem Metallocene als Katalysator verwandt wurden.In order to label cylindrical pharmaceutical vials made of PE with a circumference of 200 mm, 210 mm long label sections are cut off in a repeat from a printed plastic film web. The plastic film web consists of a single-layer, flat-extruded printed film, which is made of a 20 µm thick semi-elastic polypropylene, which was obtained by a polymerization process, in which metallocenes were used as a catalyst.

Die Etikettenabschnitte werden bei Raumtemperatur durch ein Zahnrad-Walzenpaar geschickt; beim Durchlaufen erhalten sie eine quer zur Etiketten-Längserstreckung verlaufende Ondulation bei einer Längenänderung auf 150% der Ursprungslänge, d.h. eine Längenänderung um 50%.The label sections are sent through a pair of gear rollers at room temperature; as they pass through, they receive an undulation which runs transversely to the longitudinal direction of the label when the length changes to 150% of the original length, i.e. a change in length of 50%.

Die Etikettenabschnitte werden sodann innerhalb des Fülltaktes von 0,25 sec um die Behälteraußenseite herumgelegt, wobei die Etikettenabschnitte zunächst noch stark onduliert sind. An den sich überlappenden Etikettenabschnittsrändern wird durch Klebstoffauftrag mit einem Polymethylmethacrylat und Aufeinanderdrücken der Klebstoffränder eine Verklebung eingeleitet.The label sections are then placed around the outside of the container within the filling cycle of 0.25 seconds, the label sections being initially undulated strongly. On the overlapping label section edges a glue is applied by applying adhesive with a polymethyl methacrylate and pressing the edges of the adhesive together.

Das retardierte Zurückgehen der Ondulation setzt sich fort, wobei nur sehr geringe Spannungen auf die Verklebungsstelle wirken; die Spannungen sind aber ausreichend, um das Etikett um die Außenseite der Flasche zu halten. Der Vorgang des Abbindens der Verklebung nimmt weniger Zeit in Anspruch als die retardierte Rückbildung der Ondulation (0,3 gegenüber o,75 sec). Während dieser Zeit werden die Behälter in einer Transport-Wartestation angehalten.The delayed retraction of the undulation continues, with only very slight tensions acting on the bond point; however, the tensions are sufficient to hold the label around the outside of the bottle. The process of setting the bond takes less time than the retarded regression of the undulation (0.3 compared to 0.75 sec). During this time, the containers are stopped in a transport waiting station.

Die Abmessungen des Etikettes und der Verklebungsbereiche sind so bemessen, daß eine Rest-Spannung im Etikett verbleibt. Insgesamt ist festzuhalten, daß das Verfahren ein spannungsfreies Abbinden des Klebstoffes erlaubt, wobei aufgrund der retardierten Ondulierung soviel Spannung auf das Etikett kommt, daß es fest an dem Behälter anliegt und auch bei einer geleerten Flasche aufgrund der Restschrumpfkraft trotz geringeren Flaschenumfanges nicht abfällt.The dimensions of the label and the adhesive areas are dimensioned such that a residual tension remains in the label. All in all, it should be noted that the process allows the adhesive to set without tension, and because of the retarded undulation there is so much tension on the label that it is firmly attached to the container and does not fall off even with an empty bottle due to the residual shrinkage force despite the smaller bottle size.

Claims (6)

Verfahren zum Wrap-Around-Etikettieren von zylindrischen oder prismatischen Behältern, mit folgenden Verfahrenschritten: - Ablängen eines einem Druckrapport entsprechenden Etikettenabschnittes von einer bedruckten, reversibel dehnbaren Kunststoffolien-Bahn mit einer durchgängigen oder rapportartig verteilten Klebstoffbeschichtung, - Ondulieren des Etikettenabschnittes maximal bis zur Grenze der Reversibilität und zeitlich unmittelbar vor dem Aufbringen des Etikettenabschnittes auf die Behälter-Außenseite, - Umlegen des ondulierten Etikettenabschnittes um die Behälter-Außenseite mit sich überlappenden Etikettenabschnitt-Rändern und Einleitung des Verklebevorganges durch Reaktion und/oder Erhitzen; - retardiertes Rückbildenlassen der Ondulation bis zur Anlage des Etikettenabschnittes an die Behälteraußenseite bei gleichzeitigem Ablaufenlassen des Verklebevorganges bis zu dessen Beendigung, - wobei die retardierte Rückbildung der Ondulation gleichzeitig oder kurze Zeit später als die Beendigung des Verklebvorganges terminiert ist. Process for wrap-around labeling of cylindrical or prismatic containers, with the following process steps: Cutting a label section corresponding to a print repeat from a printed, reversibly stretchable plastic film web with a continuous or repeat-like distributed adhesive coating, Undulation of the label section up to the limit of reversibility and immediately before the label section is applied to the outside of the container, - folding the undulated label section around the outside of the container with overlapping label section edges and initiation of the bonding process by reaction and / or heating; - Retarded retraction of the undulation until the label section comes into contact with the outside of the container while at the same time allowing the gluing process to continue until it ends, - The retarded regression of the undulation is terminated at the same time or a short time later than the end of the bonding process. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Etikettenabschnitte aus einem thermoplastischen Styrol-Butadien-Sequenzpolymer bestehen.A method according to claim 1, characterized in that the label sections consist of a thermoplastic styrene-butadiene sequence polymer. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Etikettenabschnitte aus Folienmaterial mit einem hohen Anteil aus mit Metallocen-Katalysatoren hergestellten elastischen Polyolefinen, insbesondere Polyethylen oder Polypropylen, bestehen.A method according to claim 1, characterized in that the label sections Film material with a high proportion of elastic polyolefins, in particular polyethylene or polypropylene, made with metallocene catalysts. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß bei der Ondulation eine Längenänderung auf 110 bis 150% der Ursprungslänge des Etikettenabschnittes eintritt.Method according to claim 1 or 2, characterized in that during the undulation, a change in length occurs to 110 to 150% of the original length of the label section. Verfahren nach Anspruch 1 bis 4, dadurch gekennzeichnet, daß die Zeitdauer der retardierten Rückbildung auf die Ursprungslänge zwischen 90 msec und 1 sec liegt.Method according to Claims 1 to 4, characterized in that the duration of the retarded regression to the original length is between 90 msec and 1 sec. Verfahren nach Anspruch 1 bis 5, dadurch gekennzeichnet, daß als Klebstoffbeschichtung eine solche aus Hotmelt-Klebstoff aufgebracht wird.Method according to Claims 1 to 5, characterized in that the hot-melt adhesive is applied as the adhesive coating.
EP97102483A 1996-03-27 1997-02-15 Method for applying wrap-around labels to containers Expired - Lifetime EP0798217B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19612027 1996-03-27
DE19612027A DE19612027C1 (en) 1996-03-27 1996-03-27 Wrap-around label application to cylindrical or prismatic containers

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EP0798217A1 true EP0798217A1 (en) 1997-10-01
EP0798217B1 EP0798217B1 (en) 1998-12-23

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US (1) US5807452A (en)
EP (1) EP0798217B1 (en)
JP (1) JPH101123A (en)
AT (1) ATE174856T1 (en)
CA (1) CA2200943A1 (en)
DE (2) DE19612027C1 (en)

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US7172220B2 (en) * 2001-11-02 2007-02-06 Quality Assured Enterprises, Inc. Extended text label for a tube container and method of manufacture thereof
US20110070384A1 (en) * 2009-09-18 2011-03-24 The Coca-Cola Company Wrap-around label, label stock and label processing

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EP0208261A2 (en) * 1985-07-12 1987-01-14 CERAMI COLOR Gesellschaft für Hartfaserbeschichtung m.b.H. Method and device for coating flat objects
FR2591197A1 (en) * 1985-12-10 1987-06-12 Descamps Andre Band for a ball of thread (clew)

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WO2009052921A1 (en) 2007-10-24 2009-04-30 Treofan Germany Gmbh & Co. Kg Label film for all-round labels
EP2502744A1 (en) 2007-10-24 2012-09-26 Treofan Germany GmbH & Co. KG Label film for all-round labels
US9533476B2 (en) 2007-10-24 2017-01-03 Treofan Germany Gmbh & Co. Kg Label film for all-round labels

Also Published As

Publication number Publication date
JPH101123A (en) 1998-01-06
EP0798217B1 (en) 1998-12-23
US5807452A (en) 1998-09-15
CA2200943A1 (en) 1997-09-27
DE59700055D1 (en) 1999-02-04
DE19612027C1 (en) 1997-05-07
ATE174856T1 (en) 1999-01-15

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