DE102017005666A1 - Opening area of a packaging material - Google Patents

Abstract

The invention relates to the opening region of a packaging material for carton-based packaging solutions having at least one perforation for partially weakening the strength properties of at least one packaging material layer, wherein at least one groove is combined with the at least one perforation such that the partial weakening of the strength properties is modified in an opening-assisting manner.

Description

The invention relates to the opening region of a packaging material for cardboard-based packaging solutions having at least one perforation for partially weakening the strength properties of at least one packaging material layer.

In order to pack, portion, store, and the like various goods, products, foods, and other items requiring protection, a variety of packaging solutions varying in their characteristics, configurations, and techniques are employed.

In the packaging and or portioning of foods and in particular pourable or flowable foods such as juices, teas, milk, soups, sauces, powders, granules, glass containers, plastic bottles, tubular bags, blister solutions and cardboard packaging are provided as packaging solutions.

Cardboard-based packaging solutions for flowable or pourable products basically have the task of reliably picking up, storing and releasing the product to be packaged, at least temporarily. If the pourable or pourable products to be packaged are foodstuffs in the broader sense, further requirements can be added to the packaging solution. These include, in particular, protective functions that at least temporarily store the food in such a way that the food occupies or maintains the properties and conditions required for consumption.

An important protective function in this context is the reliable removal of mostly external influences on the packaged food. Very important for the durability, that is, the maintenance of food-biological properties at the time of packaging is the protection against harmful microorganisms such as germs, spores, unicellulars and so on. When germs come into contact with the food in question, biological processes are triggered which lead to spoilage of the food and thus to inedibility.

Another important protective function with regard to exposure to light, and in particular also its formation in various electromagnetic wave spectra, may be required depending on the food to be packaged. Light effects, for example, can lead to the destruction of infrared or ultraviolet light-sensitive vitamins and other constituents, so that the quality and nutritive content of foods are reduced or worsened. Light effects can also cause unsightly and unappetizing discoloration.

If cartonage-based packaging solutions are used for flowable or free-flowing products and in particular foodstuffs, measures must be taken to implement the necessary protective functions.

Cardboard as a primary material for cartonage-based packaging solutions is a base material made of pulp, waste paper and, or wood pulp of different types of wood, which does not support the aforementioned protective functions, not readily or inadequately.

In order to implement at least one of the protective functions in cartonage-based packaging solutions and / or to produce the property of hermetic tightness which is important for liquid or flowable products or foods, multilayered so-called packaging materials for such packaging solutions are created. With these packaging materials, the cardboard serves as a primary material practically as a carrier and base material for realizing the mechanically required properties and / or the structural integrity. The cardboard is supplemented by at least one coating material applied on one or both sides.

Coating materials for realizing, for example, a light barrier to prevent or reduce exposure to light may be aluminum. Aluminum in various forms, for example as a web or sheet, as vapor-deposited particles or dissolved in a suspension can prevent the action of light when the layer thickness is sufficient.

Coating materials for the realization of, for example, a hermetic packaging material impermeability can be formed from various plastics such as polyethylene (PE), ethylene-vinyl alcohol copolymer (EVOH) or polypropylene (PP) and have barrier and / or adhesion promoter properties to varying degrees. Additively or alternatively, plastic-based coating materials can impart further functional properties to the carton-based packaging solution or to the packaging materials, such as good printability, surface properties, surface finishes, and the like.

Among other things, the mechanical properties of paperboard materials depend on the base material, the type of wood, the fiber orientation, the respective production steps, the added additives, the material density or its grammage and the material thickness and may also vary locally in the material due to fiber types, density and their orientation with the result that an at least partially and directionally anisotropic base material is present.

In addition to the above-mentioned tasks, characteristics and requirements for packaging solutions for various goods, products, foodstuffs and other items requiring protection, it may be necessary to open the packaging solution and / or reseal the packaging when only partially removing products. For this purpose, various variants are used which correspond to the basic idea of influencing or modifying the mechanical properties and / or the structural integrity of the strength-determining base material cardboard in a targeted and partially limited manner in a manner suitable for the opening and possibly the (re) closing.

Often, the opening or closing assisting modification is a partial weakening of the strength properties and or removal of a partial surface element of the base carton.

A first variant may be, for example, to remove a surface piece, usually in the form of a circular hole, before coating the base box therefrom. Subsequently, the required coating materials are applied over the whole area, that is to say above the cardboard and the removed surface area. In this way, the packaging material is partially modified in opening and / or closing-supporting manner. This modification is particularly advantageous in the use of opening aids, closures and in particular screw caps or drinking straws, which interact with the partial modification.

Another variant supports the opening of the packaging solution by the partial weakening of the packaging material or of the at least partially coated base cardboard to a packaging material. For this purpose, a perforation of different geometrical design is introduced into at least two layers of the packaging material or of the packaging material. Preferably, the perforation is provided in the base board and at least one coating material. In order to maintain the barrier properties with respect to exposure to light, it may be advantageous not to perforate the aluminum coating.

By this procedure, not all layers and, or laminate components of a packaging material or packaging material to perforate the requirement to limit the perforation to a well-defined packaging material / packaging material depth, so that the mechanical properties as described above modified and the respective protective functions by coating materials at least partially untouched. In this context, cut / web perforations are used because the perforated material has a cut in the thickness direction and a web (not cut).

Other conceivable perforations can be based on microhole perforations (microperforation) or bending or kinking (kink perforation).

In order to realize perforations with different geometrical configurations (for example so-called cuts, webs or half-cuts), different production methods and tools are used, for example laser cutting or mechanically based perforation insertion by rotationally moving stamped sheets or segments or by linear kinematics of motion, for example on a flatbed punch.

Perforations may be introduced at various stages of packaging manufacture and / or before filling a packaging solution with a product to be protected. For this purpose, slitters, coating systems, printing machines, punches, longitudinal seaming machines and, or filling machines can be equipped with appropriate facilities.

• - Öffnungshilfen mit Schneidelementen basieren auf Vielzahngeometrien,
• - Öffnungshilfen mit einer oder zwei Zähnen aufweisend unterschiedliche Bewegungskinematiken in einer oder mehrerer Raumrichtungen,
• - Öffnungshilfen mit Schneiden geeignet auch für Karton oder nur für Beschichtungsmaterialien,
• - Öffnungshilfen basierend auf Drückfunktionen mit Bewegungskinematiken in vorwiegend einer Raumrichtung.

Perforations and, or overcoated patches of the aforementioned type can interact functionally with different opening aids:

• - Opening aids with cutting elements are based on multi-tooth geometries,
• Opening aids with one or two teeth having different movement kinematics in one or more spatial directions,
• - Opening aids with cutting suitable also for cardboard or only for coating materials,
• - Opening aids based on pressing functions with motion kinematics in predominantly one spatial direction.

Packaging solutions, packaging materials and packaging material can be used in particular in connection with opening aids or with opening or closing-supporting modifications of the base board by partial weakening of the strength properties and / or removal a sub-surface element have significant problems and, or disadvantages.

Due to the locally reduced strength properties, the sensitivity of the packaging material in its web-shaped or arcuate shape is considerably increased, together with the risk of unintentional damage, for example during further production, handling or transport.

In many cases, the opening or closing-supporting modifications of the base box as well as the preparatory or subsequent production steps are expensive, time-consuming and complicated. Also, special machine designs of the manufacturing equipment may be required.

In the production engineering realization of the opening or closing supporting modifications by laser cutting, quality deficits can result from exposure of the laser beam during the cut (discontinuous laser beam) or as a result of deviating, that is, in particular time-delayed start and stop effects.

Another problem in the partial weakening of the strength properties and, or removing a partial surface element of the base box and, or the packaging material or the packaging material or by laser cuts may result from the physical effect of this manufacturing form. Laser or more generally bundled and usually highly concentrated light results in a thermal cutting process. Due to the partial action of very high temperatures, the base board and / or other packaging material components may suffer local burns, smoldering effects and / or other charring. Effects of this kind can have a negative effect on the food to be packaged.

If the weakening of the strength properties of the base board and / or of the packaging material or of the packaging material is brought about by perforation, a high-precision and not always reliably observed immersion or cutting depth is required. This circumstance is primarily, but not exclusively, attributable to two influencing factors: On the one hand, very low-tolerance production control is required; on the other hand, the determination of the correct immersion or cutting depth is already subject to considerable tolerances and inaccuracies. Furthermore, there is often the situation that the material thicknesses of the base board and the coating materials can vary considerably from each other.

As a result of these imponderables, there is the latent risk that the partial weakening of the strength properties of the base board and / or the packaging material or the packaging material does not meet the desired values at least locally if the perforation depth is too low or if the respective protective functions of the coating materials are impaired if the depth of perforation is too high.

Due to the use of polyethylene (PE) as a coating material, the so-called "PE-drawing" problem may arise in connection with the partial weakening of the strength properties and / or removal of a partial surface element of the base board and / or the packaging material. Under this packaging experts understand the at least temporarily occurring elastic-plastic material behavior of PE especially, but not only at the opening of the packaging. As a result of its material behavior, the PE can draw threads and, or similar to an elastic membrane, can not be severed. The elastic portion of the material behavior can result in restoring forces and close the forming product removal opening of the package in unfavorable cases partially or completely unintentionally.

As a production engineering challenge, the shape and position tolerances of the partial weakenings of the strength properties and or removal of a partial surface element of the base board and / or of the packaging material or of the packaging material in their geometrical configuration are designed in absolute or relative respect to each other and or the relative position an opening aid. Particularly problematic are the optionally undesirably adding up tolerances of the production steps involved.

It is an object of the invention to develop cartonage-based packaging solutions with at least one protective function with regard to opening or closing-supporting modifications to be provided by partial weakening of the strength properties and / or removal of a partial surface element and to at least partially reduce existing disadvantages.

The teaching according to the invention recognizes that perforations by means of a combination with grooves are suitable for influencing the local material properties of the web or sheet-shaped packaging material or packaging material to be perforated in a defined geometric region such that the immersion or cutting depth of the perforation tool takes place considerably more accurately and with reduced tolerances. in the As a result, perforations in packaging materials or packaging materials are supported whose depth of cut or web thickness are within very narrow tolerance ranges and are both defined and reproducible.

In the previously known perforations penetrates a perforation tool, which is formed for example by one or a plurality of cutting teeth, as a result of acting on the perforation tool and acting substantially perpendicular to the workpiece to be perforated force in the coating materials and, or the base box of the packaging material or packaging material one. As a result, the cardboard with its at least locally present anisotropic mechanical properties is first compressed or compressed within a discrete volume element before the cardboard fibers are torn or severed.

These effects, which are fundamentally based on elastic-plastic material behavior, are not only particularly pronounced in the case of cardboard packaging, but also vary considerably in some areas and can not be defined in advance. Primarily responsible are the statistically random alignments of wood fibers inside the box and the use of different types of wood with unequal structural properties and material thicknesses in one batch for board production.

The invention recognizes that not only but in particular the elastic component of the material behavior has a decisive influence on the depth of cut and / or the web thickness and, or the relationship between the two, resulting in their considerable tolerance widths.

As a result of the resulting depth tolerances either the base board can not be sufficiently perforated, that is to say over its material thickness, or the coating material adjoining the board in the direction of perforation is also cut in or stresses are induced in it by the cutting wedge of the perforation tool. If the adjoining coating material is, for example, an aluminum, the reduced mechanical properties can lead to cracks occurring directly or subsequently, or it is severed, so that the barrier properties are lost.

The invention further recognizes that creases are suitable for significantly influencing the elastic component of the material behavior of the base board and / or at least one of the coating materials. Under creases in the context of the invention are all preferably linear and notched, emanating from a surface of the packaging material or the packaging material material compression to understand.

The compressed material regions extend in particular in the cardboard material in a localized and direct environment of the creasing lines, which are practically surface notches. Furthermore, the invention recognizes that the material reaction to the scoring is characterized by a compression gradient. This means that the resulting material compaction in the immediate vicinity of the surface notch is discontinuous in the transverse direction to the crease line and a relative compression maximum is present in the notch root.

The at least local compression by creasing is the result of a compression process resulting from a force loading, preferably applied approximately perpendicularly by the creasing tool on the workpiece to be grooved and the amount is chosen so that the elastic deformation component is complete and the plastic deformation rate of the packaging material or the packaging material partially provoked. The result of a creasing process is a notch extending from the workpiece surface with a locally compressed compression area in the form of a permanent deformation.

A further content of the invention lies in the fact that the disadvantages of the conventional perforation in a packaging material or packaging material can be at least partially reduced by at least one scoring. The invention recognizes that the partial compression results of the creases in or adjacent to perforations can significantly improve the desired perforation results. The partial compression supports local material properties with a lower elastic deformation rate. As a result, the local, discontinuously occurring, anisotropic elastic-plastic material behavior patterns of the cardboard and / or the coating materials of the packaging material or of the packaging material are reduced and / or evened out, so that reproducible perforation depths with narrow tolerance depths or ridge widths or their depth ratio to each other is supported.

• - das lokal definierte und, oder vergleichmäßigte Werkstoffverhalten des Packstoffes beziehungsweise des Verpackungsmaterials verbessert die genauere Lageposition der Perforation,
• - gleiches gilt für deren Schnitttiefe,
• - die Schneiden beziehungsweise Zähne von mit der Perforation zusammenwirkenden Öffnungshilfen werden besser geführt,
• - eine Sollbruchstelle zur Öffnung der Verpackungslösung wird mit definierten Eigenschaften bereitgestellt,
• - die Stabilitätsmodifikation des Kartons und der Sollbruchstelle kann PE-Ziehen in seiner Ausprägung reduzieren oder verhindern,
• - Stabilitätserhöhung von Flächenausnehmungen an seiner scharnierähnlichen Klappstelle,
• - die Flächenausnehmung (der sogenannte Wegklapplappen) ist mit seinem Kartonbestandteil stabiler und besser geschützt als die vor dem Überbeschichten entfernten Flächenelemente (OCH - overcoated hole) ohne Kartonbasismaterial,
• - es wird eine Abreißlinie erzeugt um Materialspaltungen zwischen den Lagen des Kartons und der Beschichtungsmaterialien zu vermeiden,
• - Tiefe, Lage und Linearerstreckungsgenauigkeit der Schnitte, Perforationen oder Rillungen wird verbessert,
• - Führungverbesserung des Schneidzahnes oder Druckzahnes.

The above-described locally changed material properties due to the creasing and or the improvements of the perforation formation result in addition to the at least partial reduction of the disadvantages of the known perforations by the invention further advantages in an additive or alternative manner:

• - the locally defined and / or uniformed material behavior of the packaging material or of the packaging material improves the more accurate position position of the perforation,
• - the same applies to their cutting depth,
• - The cutting edges or teeth of cooperating with the perforation opening aids are better managed,
• a predetermined breaking point for opening the packaging solution is provided with defined properties,
• the stability modification of the cardboard box and the predetermined breaking point can reduce or prevent PE drawing in its expression,
• Increase in stability of surface recesses at its hinge-like folding point,
• - The surface recess (the so-called Wegklapplappen) is stable and better protected with its paperboard component than the removed before the overcoating surface elements (OCH - overcoated hole) without cardboard base material,
• a tear-off line is produced in order to avoid material splits between the layers of the cardboard and the coating materials,
• Depth, position and linear extension accuracy of the cuts, perforations or creases is improved,
• - Leadership improvement of the cutting tooth or pressure tooth.

In order to achieve at least one of the stated advantages, improvements or reduction of disadvantages, the creasing lines at least partially interact with the perforation in that at least one creasing line section is adjacent to at least one perforation section in a surface area such that the induced material behavior changes by the Groove in the geometric sphere of influence of at least one perforation section.

In principle, the score lines can be introduced into the packaging material or the packaging material before, immediately during or after the perforation. It is irrelevant whether it is web or sheet-shaped starting material.

If the grooving before the perforation realized realized in general all previously performed relationships unrestricted. If the grooving is realized immediately during the perforation, the previously explained relationships predominantly and largely apply. If the grooving is realized after the perforation, the previously explained relationships are limited in that primarily the changed local, discontinuous, anisotropic elastic-plastic material behavior patterns of the cardboard and / or the coating materials of the packaging material or of the packaging material improves the functional interaction with optionally usable opening aids.

• - geometrischer Längserstreckung, beispielsweise ovaler, runder, linearer oder teillinearer Verläufe,
• - Perforationstypen wie beispielsweise Schnitt, Schnitt-Steg, Schnitt mit Brücken, Mikroperforation, HalfCut ect.,
• - Ein- und, oder Mehrfachanordnungen von wenigstens Teilbereichen der Rillungen und Perforationen sowie
• - deren relative Anordnung zumindest bereichsweise zueinander.

The idea of the invention supports all possible configurations and variants of perforations and creases with regard to

• - geometric longitudinal extension, for example oval, round, linear or part-linear courses,
• - Perforation types such as cut, cut bridge, cut with bridges, micro perforation, HalfCut ect.,
• - Single and / or multiple arrangements of at least portions of the grooves and perforations and
• - The relative arrangement at least partially to each other.

• 1 eine Schnittdarstellung eines bekannten Verpackungsmaterials (1) mit einem exemplarischen, mehrschichtigen Aufbau und
• 2 die Schnittdarstellung eines bekannten Verpackungsmaterials (1) mit einem exemplarischen, mehrschichtigen Aufbau enthaltend eine Flächenelementfehlstelle (100) und
• 3 die Schnittdarstellung eines bekannten Verpackungsmaterials (1) mit einem exemplarischen, mehrschichtigen Aufbau sowie einer Perforation (200) mit einer Schnitttiefe t, einer Schnittbreite b und einer Stegdicke s und
• 4 eine schematische Schnittdarstellung eines ersten exemplarischen Ausführungsbeispiels der erfindungsgemäßen Kombination von Perforation (200) und Rillung (300) in einem mehrschichtig aufgebauten Verpackungsmaterial (1) und
• 5 eine Draufsicht auf eine mögliche Ausgestaltungsform der erfindungsgemäßen Kombination wenigstens einer Perforation (200) in Teilkreisbogenform und wenigstens einer dazu außen vorgesehenen Rillung (300) in einer Kreisbogenform eingebracht in ein Verpackungsmaterial (1) und
• 6 eine Draufsicht auf eine weitere mögliche Ausgestaltungsform der erfindungsgemäßen Kombination wenigstens einer Perforation (200) in Teilkreisbogenform und wenigstens einer dazu innen vorgesehenen Rillung (300) in einer Kreisbogenform eingebracht in ein Verpackungsmaterial (1) und
• 7 eine Draufsicht auf eine weitere mögliche Ausgestaltungsform der erfindungsgemäßen Kombination wenigstens einer Perforation (200) in Kreisbogenform und zwei sowohl dazu innen als auch außen vorgesehenen Rillungen (300) in Kreisbogenform eingebracht in ein Verpackungsmaterial (1) und
• 8 eine Draufsicht auf eine weitere mögliche Ausgestaltungsform der erfindungsgemäßen Kombination wenigstens einer Perforation (200) in Teilkreisbogenform und zwei sowohl dazu innen als auch außen vorgesehenen Rillungen (300) in Kreisbogenform eingebracht in ein Verpackungsmaterial (1) und
• 9 eine Draufsicht auf eine Ausgestaltungsform der erfindungsgemäßen Mehrfachkombination von wenigstens zwei Perforationen (200) in Kreisbogenform und wenigstens drei sowohl dazu innen als auch außen vorgesehenen Rillungen (300) in Kreisbogenform eingebracht in ein Verpackungsmaterial (1) sowie
• 10 eine Draufsicht auf eine weitere mögliche Ausgestaltungsform der erfindungsgemäßen Kombination wenigstens einer Perforation (200) in Kreisbogenform und zwei sowohl dazu innen als auch außen vorgesehenen Rillungen (300) in Kreisbogenform kombiniert mit wenigstens einer Bogenabschnittsrillung (300') eingebracht in ein Verpackungsmaterial (1).

In the drawings, embodiments of the invention are shown. Show it:

• 1 a sectional view of a known packaging material ( 1 ) with an exemplary, multi-layered structure and
• 2 the sectional view of a known packaging material ( 1 ) having an exemplary multilayered structure comprising a surface element miss ( 100 ) and
• 3 the sectional view of a known packaging material ( 1 ) with an exemplary multilayer structure and a perforation ( 200 ) with a cutting depth t, a cutting width b and a web thickness s and
• 4 1 is a schematic sectional view of a first exemplary embodiment of the combination of perforation (FIG. 200 ) and grooving ( 300 ) in a multilayered packaging material ( 1 ) and
• 5 a plan view of a possible embodiment of the inventive combination of at least one perforation ( 200 ) in partial circular arc shape and at least one outside provided for scoring ( 300 ) are introduced in a circular arc form into a packaging material ( 1 ) and
• 6 4 is a plan view of another possible embodiment of the combination according to the invention of at least one perforation (FIG. 200 ) in partial arc form and at least one groove provided internally ( 300 ) are introduced in a circular arc form into a packaging material ( 1 ) and
• 7 4 is a plan view of another possible embodiment of the combination according to the invention of at least one perforation (FIG. 200 ) in a circular arc shape and two internally and externally provided creases ( 300 ) in a circular arc form in a packaging material ( 1 ) and
• 8th 4 is a plan view of another possible embodiment of the combination according to the invention of at least one perforation (FIG. 200 ) in partial arc form and two both internally and externally provided creases ( 300 ) in a circular arc form in a packaging material ( 1 ) and
• 9 a top view of an embodiment of the inventive multiple combination of at least two perforations ( 200 ) in a circular arc shape and at least three both internally and externally provided creases ( 300 ) in a circular arc form in a packaging material ( 1 ) such as
• 10 4 is a plan view of another possible embodiment of the combination according to the invention of at least one perforation (FIG. 200 ) in a circular arc shape and two internally and externally provided creases ( 300 ) in a circular arc shape combined with at least one Bogenabschnittsrillung ( 300 ' ) introduced into a packaging material ( 1 ).

1 is the sectional view of a known packaging material ( 1 ) with an exemplary, multi-layered structure. Generic packaging materials ( 1 ) of this type are also known as packaging material, which consists of at least one cardboard base material ( 10 ) and at least one coating material ( 20 . 60 . 40 . 50 . 60 ) are constructed.

Between the at least one first cardboard layer ( 10 ) and the at least one further layer ( 20 . 30 . 40 . 50 . 60 ), other layers, in particular adhesion promoter substances of various types can be applied or applied. Often, the at least one further coating is by an aluminum material ( 30 ), which is sprayed or vapor-deposited as particles dissolved in a suspension, or as a sheet-like or sheet-like semi-finished product on, for example, the cardboard ( 10 ) or another coating material ( 20 . 40 . 50 . 60 ) is laminated or printed.

Due to the use of packaging material ( 1 ) as a product wrapping product P enclosing container is at least one outer surface of the web or sheet-shaped packaging material ( 1 ) facing the product P and with this often in direct contact. An outer surface of the web or sheet-shaped packaging material ( 1 ) is usually remote from the product P and may have an externally visible surface.

The at least one outer surface of the web or sheet-shaped packaging material ( 1 ), which faces the product P and is in direct contact with it, may have to have liquid-tight properties, in particular in the case of liquid and / or flowable products P. In this context, plastic-based coatings ( 20 ).

At least one outwardly visible outer surface of the web or sheet-shaped packaging material ( 1 ) optical, color and, or haptic requirements can be made. Suitable coating materials are, for example, paint jobs or offset printing ( 60 ) as well as in the case of coating ( 40 . 50 ) directly on the cardboard base material in the form of Kartonageaufdruck by offset, flexo or gravure printing process

The basic idea of carton-based, multilayer packaging materials ( 1 ) is the mechanical properties of the carton ( 10 ) for the stability of the packaging formed therefrom and that of the carton ( 10 ) not to own properties depending on the demand, such as germ and, or light barrier, hermetic liquid tightness, surface smoothness and so on practically "add-to-laminate".

2 shows the sectional view of a known packaging material ( 1 ) having an exemplary multilayered structure comprising a surface element miss ( 100 ). Under area element miss ( 100 ) the at least partial removal of a surface portion of the carton ( 10 ), so that in this area of the packaging material ( 1 ) the multilayer structure is present without the cardboard layer.

These surface element defects known as overcoated holes (OHC) ( 100 ) can via a front side of the cutout lying cavity area ( 101 ) through the cut surface on the cardboard ( 10 ) and the coating materials ( 40 . 50 . 20 . 30 . 60 ) is enclosed.

Surface element defects ( 100 ) due to their structural design and the lack of cardboard material ( 10 ) about decreased mechanical and / or structural strength properties while retaining the properties of the respective coating materials ( 20 . 30 . 40 . 50 . 60 ) supported properties.

Frequently, but not necessarily, surface element defects ( 100 ) designed in a circle, so that they interact functionally with, for example, drinking straws or opening aids for taking product out of the packaging solution. Basically, surface element defects ( 100 ) can be realized in all geometric configurations.

3 illustrates a schematic sectional view of a known packaging material ( 1 ) with an exemplary multilayer structure and a perforation ( 200 ) with a cutting depth t, a cutting width b and a web thickness s.

A perforation ( 200 ) This type can be designed in the longitudinal direction as a cut-web sequence or as a so-called HalfCut. In the thickness direction of the packaging material ( 1 ) the cutting depth t is chosen so that at least the cardboard base material ( 10 ) is at least partially cut through with its strength-determining properties for the subsequent packaging solution. In this way, a targeted local strength reduction is achieved, which supports the opening of the packaging solution and, or their product removal in different ways.

Corresponding to the depth of cut t of the perforation ( 200 ) in conjunction with the total thickness of the Packstofflaminates ( 1 ) is the web thickness s. The perforation web comprises the non-cut or only partially cut material layers of the packaging material ( 1 ), so that the barrier, protective and the respectively associated other coating properties remain at least partially preserved. In the exemplary embodiment shown, which is to be understood only as an example, the web is schematically represented by two coating materials ( 20 . 30 ) educated.

4 shows a schematic sectional view of a first exemplary embodiment of the inventive combination of perforation ( 200 ) and grooving ( 300 ) in a multilayered packaging material ( 1 ).

Both the at least one perforation ( 200 ) as well as the at least one groove ( 300 ) are introduced from the side facing away from the product P or the food to be packaged surface side and thus from the outside of the later packaging. The web area of the perforation ( 200 ) therefore adjoins the surface side facing the product P or the food to be packaged. The embodiment in 4 shows a perforation ( 200 ) with two adjacent grooves ( 300 ).

Alternative to the illustration in 4 the at least one groove ( 300 ) also of the perforation ( 200 ) facing away from the packaging material ( 1 ) will be realized. Are two or more creases ( 300 ) provided these can be introduced from one or both sides, symmetrical or asymmetrical in location and number.

The invention recognizes that at least one groove ( 300 ) supported in a distance range of 0 to 10 * b, preferably 0 to 5 * b the material advantage outlined above. In the case of the distance zero, the situation is that grooving ( 300 ) and perforation ( 200 ) are congruently superimposed.

5 comprises the top view of a possible embodiment of the combination according to the invention of at least one perforation ( 200 ) in partial circular arc shape and at least one outside provided for scoring ( 300 ) are introduced in a circular arc form into a packaging material ( 1 ).

The embodiment of the invention shown in this exemplary embodiment provides a part-circular perforation ( 200 ), so that at least on a section area of the congruently projected (imaginary) circle no perforation ( 200 ) is available. In this way, the material breakage-forming material weakening is limited to a partial circle and practically a hinge ( 111 ) formed by the non-weakened circle.

By the at least one perforation ( 200 ) and, or the at least one grooving ( 300 ) becomes an opening area element ( 110 ) with a hinge ( 111 ) which facilitates the easier access to the product P or the opening of the packaging solution.

The hinge ( 111 ) serves to open the opening area ( 110 ) at and, or after opening along the perforation ( 200 ) to fold out of the packaging material level or to pivot, so that there is an open area. The folding function of the hinge ( 111 ) can by the at least one grooving ( 300 ) are supported direction-dependent in the perforation-free area.

Not shown, but also according to the invention possible, the folding function of the hinge ( 111 ) instead of or in addition to at least one grooving ( 300 ) through a perforation ( 200 ) with reduced cutting depth t.

The perforation in this example ( 200 ) outside extensive grooving ( 300 ) is arranged concentrically, so that there is a possible within the scope of manufacturing tolerances equal distance to each other. Other possibilities of realization may also be non-concentric relative positions and arbitrary line courses of the at least one perforation deviating from the circular geometry (US Pat. 200 ) and, or the at least one grooving ( 300 ).

At least one position reference ( 70 ), which can be realized as a print mark, can be used to determine the relative position of the at least one perforation (FIG. 200 ) and, or the at least one grooving ( 300 ) on the packaging material ( 1 ) define. This can be ensured by an example optically or optoelectronically controlled perforation and, or grooving the desired relative position.

6 2 shows a plan view of a further possible embodiment of the combination according to the invention of at least one perforation (FIG. 200 ) in partial arc form and at least one groove provided internally ( 300 ) are introduced in a circular arc form into a packaging material ( 1 ). Through the opening surface element ( 110 ) Perforated area surrounding perforation ( 200 ), the resulting after the opening process cutting surface can make relatively burr-free and a clean cut contour is achieved.

A further variant according to the invention in the region of the opening location of a packaging material ( 1 ) shows 7 , Shown is a plan view of another possible embodiment of the inventive combination of at least one perforation ( 200 ) in a circular arc shape and two internally and externally provided creases ( 300 ) in a circular arc form in a packaging material ( 1 ).

8th illustrates a plan view of the sectional view of 4 to another possible embodiment of the inventive combination of at least one perforation ( 200 ) in partial arc form and two both internally and externally provided creases ( 300 ) in a circular arc form in a packaging material ( 1 ). This variant also uses the hinge ( 111 ), the opening area ( 110 ) at and, or after opening along the perforation ( 200 ) out of the packaging material level so that an open area is supported.

The folding function of the hinge ( 111 ) can by the two creases ( 300 ) in the perforation-free area opposite the variant with a grooving ( 300 ) according to 5 or 6 be improved again. Also, the invention recognizes that it is possible by the relative position of at least one grooving ( 300 ) inside or outside the perforation ( 200 ) the position of the hinged position of the hinge ( 111 ), that is to influence the center of rotation of the pivotal movement targeted.

9 1 shows a plan view of an embodiment of the inventive multiple combination of at least two perforations (FIG. 200 ) in a circular arc shape and at least three both internally and externally provided creases ( 300 ) in a circular arc form in a packaging material ( 1 ). This embodiment of the invention can, when using possible opening aids their shape tolerances and or inaccuracies in size and, or a positional offset of opening aid and perforations ( 200 ) functionally support each other such that a cooperation of opening area and opening aid with respect to the opening of the package and, or product removal is ensured even in these cases.

10 comprises a plan view of a further possible embodiment of the combination according to the invention of at least one perforation ( 200 ) in a circular arc shape and two internally and externally provided creases ( 300 ) in a circular arc shape combined with at least one Bogenabschnittsrillung ( 300 ' ) introduced into a packaging material ( 1 ). The at least one Bogenabschnittsrillung ( 300 ' ) is fan-shaped and inwardly of the opening area ( 110 ), so that the at least one tooth of a corresponding opening aid to the cut line of the perforation ( 200 ) and an improved opening of the packaging solution in the opening area ( 110 ) is supported. Another additive or alternatively resulting advantage is the so-called Aufsetzoleranzen, that is, a tolerance-related positional offset of opening aid and opening area ( 110 ) is compensated relative to each other such that the opening function is due to the interaction not or only slightly degraded functionally.

Basically, all shown combinations according to the invention are at least one perforation ( 200 ) and at least one groove ( 300 ) suitable to interact with various opening aids and, or drinking straws. The same applies to the opening support without or other opening aids.

Claims (20)

Opening portion of a packaging material (1) for a carton-based packaging solution comprising at least one perforation (200) for partial weakening of the strength properties of at least one packaging material layer (10, 20, 30, 40, 50, 60), characterized in that at least one groove (300) is combined with the at least one perforation (200) such that the partial weakening of the strength properties in opening-supporting way is modified. Opening area of a packaging material (1) after Claim 1 , characterized in that the at least one perforation (200) has a cutting depth t and a cutting width b and a web thickness s. Opening area of a packaging material (1) after Claim 1 , characterized in that the at least one perforation (200) extends in regions in the longitudinal direction of the packaging material (1). Opening area of a packaging material (1) after Claim 3 , characterized in that the regional extension of the at least one perforation (200) is linear and, or circular and, or arc-shaped and, or arc-section-shaped. Opening area of a packaging material (1) after Claim 1 , characterized in that the at least one perforation (200) is formed by cuts and, or cutting webs and, or cuts with bridges and, or microperforations and, or HalfCut. Opening area of a packaging material (1) after Claim 1 , characterized in that the at least one groove (300) extends in regions in the longitudinal direction of the packaging material (1). Opening area of a packaging material (1) after Claim 6 , characterized in that the regional extension of the at least one groove (300) is linear and, or circular and, or arc-shaped and, or arc-shaped. Opening area of a packaging material (1) after Claim 1 , characterized in that the at least one groove (300) is formed by a surface notch with a local material compression. Opening area of a packaging material (1) after Claim 8 , characterized in that the surface notch has a local material compaction discontinuously in the transverse direction to the score line (300) and a relative compression maximum in the notch base. Opening area of a packaging material (1) after Claim 8 , characterized in that the surface notch of the at least one groove (300) in the directly adjacent discrete packaging material (1) induces a stress gradient. Opening area of a packaging material (1) after Claim 1 , characterized in that the at least one perforation (200) is combined with the at least one groove (300) at least regionally in the longitudinal extension direction. Opening area of a packaging material (1) after Claim 1 , characterized in that the at least one perforation (200) is formed in partial arc or circular arc shape and combined with at least one outside and, or inside provided grooving (300) in a circular arc shape, and partial arc form. Opening area of a packaging material (1) after Claim 12 , characterized in that the at least one perforation (200) and the at least one groove (300) are combined concentrically with one another. Opening area of a packaging material (1) after Claim 12 , characterized in that the at least one perforation (200) and the at least one groove (300) are combined with a center offset from each other. Opening area of a packaging material (1) after Claim 1 , characterized in that the at least one perforation (200) is combined with at least one Bogenabschnittsrillung (300 '). Opening area of a packaging material (1) after Claim 15 , characterized in that the at least one Bogenabschnittsrillung (300 ') extends longitudinally in the opening surface element (110). Opening area of a packaging material (1) after Claim 1 , characterized in that the at least one perforation (200) and the at least one groove (300) and / or at least one Bogenabschnittsrillung (300 ') in a range of 0 to 10 * b, preferably 0 to 5 * b are spaced apart. Packaging material (1) for producing a packaging solution for pourable foodstuffs, having an opening region according to one of the preceding claims. Method for producing the opening region of a packaging material (1) with partial weakening of the strength properties according to one of the preceding claims comprising the steps (a) at least one perforation (200) and (b) at least one grooving (300, 300 ') in the packaging material (1) bring. Process for the preparation of the opening area after Claim 19 , characterized in that step (b) occurs before, simultaneously or subsequently to step (a).

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