EP0912400B1 - Process for production of opening means for a package - Google Patents
Process for production of opening means for a package Download PDFInfo
- Publication number
- EP0912400B1 EP0912400B1 EP97932703A EP97932703A EP0912400B1 EP 0912400 B1 EP0912400 B1 EP 0912400B1 EP 97932703 A EP97932703 A EP 97932703A EP 97932703 A EP97932703 A EP 97932703A EP 0912400 B1 EP0912400 B1 EP 0912400B1
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- EP
- European Patent Office
- Prior art keywords
- cuts
- width
- plastic material
- packaging
- polyamide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 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
- B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
- B65B61/18—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for making package-opening or unpacking elements
- B65B61/182—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for making package-opening or unpacking elements by applying tear-strips or tear-tapes
Definitions
- the invention relates to a method for producing a Packaging consisting essentially of plastic film, with means of opening the packaging without the aid of Tool and packaging that can be produced afterwards.
- Packaging that without the use of tools, such as. Knives, can openers etc., can be opened, i.e. so-called easy-open systems have been used in recent years because of the significant simplification of handling the consumer has become increasingly important.
- plastic film packaging is so-called tear strips known either in the film material are incorporated or subsequently on the filled Packaging by welding on at the same time Embossing.
- a packaging is known from US Pat. No. 4,840,270, into which a removal opening is punched which is then covered by a partially removable strip. The one for this attached cuts are curved and self-contained around a corresponding removal opening define. When the cover strip is pulled off, a complete one is immediately obtained Removal opening exposed from which the product can be removed.
- the object of the present invention is to overcome the disadvantages to overcome the known prior art and a To provide procedures with which for packaging made of plastic film reliably an easy-open concept can be realized.
- this object is achieved in that the Plastic film fed from the roll to a cutting station will be in one of the size of the final packaging adapted clock cuts are attached, each of which is substantially rectilinear and their Width is less than the width of the plastic film and cut through the thickness completely; that in the area the cuts cover them completely Cover strips are applied in a sealing but removable manner; and that the plastic film prepared in this way in in a manner known per se for the final packaging is processed further.
- the cuts by a number of partial cuts separated by webs appropriate.
- the width of the Partial cuts and / or the webs in different places the cuts are the same or, in the second alternative, to be different.
- the invention further provides that a number n first sequence of partial sections Partial cuts of constant width alternating with a one Number m of second sections comprising partial cuts Partial cuts of constant width is applied, the Width of the partial sections belonging to the first sequence of the width of the partial cuts belonging to the second sequence is different.
- n 1 and m is 1.
- n 1 and m is 2.
- polypropylene one or multilayer polyamide
- polypropylene with the polyamide layer is preferably either a coextruded polyamide or consists of at least two polyamide layers, wherein which is a layer of a polyamide with high barrier properties while the other layer is made of a polyamide with high shrinkage.
- A is preferred as the material for the cover strip Laminate used, the inner one, above the cuts in the Plastic film arranged layer of an adhesive peelable plastic consists, preferably of a copolymer made of polyethylene and polypropylene.
- the method of the present invention realizes several Advantages that - at least in this combination - at Processes according to the prior art have not yet been implemented have been.
- On the other hand is a manufactured by the inventive method Packaging by pulling off the cover strip over the Cut and break up the packaging due to deformation the same particularly easy in the area of the cut open and remove the content.
- the advantages described are particularly noticeable, if the filled packaging undergoes a sterilization process is subjected.
- the system described is without able to withstand temperatures and internal pressures to withstand such a process, on the other the packaging material is subject to such Heat treatment of shrinkage, which is the breaking up of the Packaging by deformation after pulling off the Masking tape over the cut further facilitated.
- the Advantages described with packaging that one Sterilization process are known with Easy-Open systems not accessible.
- the use of the preferred materials both for the plastic film as well as for the cover strip bring even more advantages.
- the special preferred laminate plastic film offers enough Stability that no stretch due to the deduction from the roll and there is no tearing of the cut made.
- each one in one of the size of the final packaging adapted stroke made cuts, its width is less than the width of the plastic film and the die Plastic film completely cut through by a number of partial cuts separated by webs, is generally an increased mechanical stability after achievable packaging achieved. This increased mechanical stability is also reflected in the Withdrawal behavior during film transport in the Packaging machine in such a way that it is used by thinner foils is possible. It also diminishes there is a risk of the film tearing.
- the quality of the sealed seam increases the higher strength.
- the heating energy requirement, which is required when the cover strip is sealed is reduced.
- Another procedural advantage is that by cutting through a number of through webs separate partial sections is attached, the feed of the heating energy required for sealing from the Tear strip opposite side is simplified.
- the packaging that can be produced by the method according to the invention shows a higher compared to transport stress mechanical stability, which not only leads to a reduction the product loss caused by transport damage leads, but especially if it is perishable Products, reduces the risk of microbial spoilage.
- the width of the partial cut delimited by two webs larger or is less than or equal to the width of a web.
- FIG. 1 can be seen for packaging using plastic film 10 from a supply roll rollers used to smooth the film run (not shown) fed to a cutting station 20.
- a Cut 11 by means of a cutting tool 25.
- the cut 11 becomes centered in the film 10 attached, the width of the cut 11 so too choose is that - depending on the plastic material used - by further pulling off the film Elongation or tearing of the cut is avoided. It is essential that the cut 11 is not just one Weakening of the plastic material causes, but this completely severed.
- the subsequent station 30 for applying the cover strips 15 these are based on a known Technology manufactured, supplied and applied. This is done first a feed from a supply roll 32 a cutting station 34, in the cover strip 15 in the desired Width, e.g. 6 to 12 mm. These masking strips are applied to a vacuum Stamp 35 of a sealing device 36 fixed. Subsequently the sealing device 36 is rotated by 180 ° and the with Vacuum-fixed cover strips 15 on the next one supplied Cut 11 in the plastic film 10 at one Temperature of approx. 210 ° C sealed so that the cut is completely sealed.
- the packaging a known hose forming and filling station (not shown) in which e.g. on sausage-like product is produced.
- this is according to the invention preferred material from two layers of polypropylene 12, 12 ', between which a single or multi-layer polyamide layer 13 is arranged, wherein the polyamide layer be co-extruded polyamide or from two polyamide layers 13 ', 13' ', of which the upper, i.e. the the outer polypropylene layer 12 facing layer 13 ' a polyamide with high barrier properties, while the lower, i.e. that of the inner polypropylene layer 12 'facing layer 13' 'of a polyamide with high Shrinkage properties exist.
- the plastic material can be a packaging material be made available, on the one hand, excellent Barrier properties against oxygen and water vapor and also optimal on the polyamide layer is printable.
- the Covering strip 15 covering width and length attached, which is preferably also constructed as a laminate. It is important to ensure that the one facing the cut Layer 16 of the laminate has the necessary adhesive properties owns, i.e. be fixed firmly over the cut can, but at the same time optimally peelable, i.e. removable is.
- a copolymer of is particularly preferred Polyethylene and polypropylene proved.
- the arranged above Layers 17, 18 are in their composition less critical. In the illustrated embodiment, can it is a PET layer 17 and a final one Act polypropylene layer 18, but also other materials are conceivable.
- FIG. 3 shows one of a sequence of webs 11a constant width separate sections 11b constant Width existing cut, the width of the partial cuts a multiple of the width of the partial cuts separating webs.
- FIG. 4 shows a sectional design in which the width of the Partial cuts 11b approximately the width of the between the Partially arranged webs 11a corresponds.
- FIG. 5 shows an embodiment of the cut design, in which the width of the arranged between the partial cuts 11b Webs 11a is smaller than the width of the partial cuts, the partial cuts from an alternating There is a sequence of partial cuts, whereby again the Width of a partial cut larger or smaller than that of the following partial section.
- FIG. 6 shows an embodiment of the cut design, in which a sequence 11c consisting of two partial cuts alternating with a sequence 11d from a partial section is attached.
- the partial cuts included in the first sequence have the same width as each other however, versus the width of that in the second order included partial cut shorter.
- the width of the between the various sequences arranged webs is about the total cutting width approximately constant.
- the Width of the between the sections of the first sequence Arranged webs be approximately equal to the width of the between arranged the partial sections of the second sequence Stege.
- FIG. 7 shows a sectional design, which are similar to that shown in FIG. 4 shown cut execution is, however, both the width of the webs as well as that of the partial cuts is significantly reduced, so that a perforation line is formed in the present case becomes.
- the method according to the invention is particularly suitable Way for the production of cylindrical packaging in Sausage form, which is either a sausage product can act for the food sector or around sausage-presented animal food products, such as a so-called dog sausage, the latter being the Filling from a moist to semi-moist chunky dog food can exist.
- a sausage product can act for the food sector or around sausage-presented animal food products, such as a so-called dog sausage, the latter being the Filling from a moist to semi-moist chunky dog food can exist.
- dog sausage so-called dog sausage
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Packages (AREA)
- Wrappers (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Auxiliary Devices For And Details Of Packaging Control (AREA)
Description
Die Erfindung betrifft ein Verfahren zur Herstellung einer Verpackung, die im wesentlichen aus Kunststoffolie besteht, mit Mitteln zum Öffnen der Verpackung ohne Zuhilfenahme von Werkzeug sowie eine danach herstellbare Verpackung.The invention relates to a method for producing a Packaging consisting essentially of plastic film, with means of opening the packaging without the aid of Tool and packaging that can be produced afterwards.
Verpackungen, die ohne Zuhilfenahme von Werkzeug, wie bspw. Messer, Dosenöffner etc., geöffnet werden können, d.h. sogenannte Easy-Open-Systeme, haben in den letzten Jahren wegen der wesentlichen Vereinfachung der Handhabung durch den Verbraucher zunehmend an Bedeutung gewonnen. Bei Verpackungen aus Kunststoffolie sind dabei sogenannte Aufreißstreifen bekannt, die entweder in das Folienmaterial eingearbeitet sind oder nachträglich an der fertig gefüllten Verpackung durch Aufschweißen unter gleichzeitiger Einprägung angebracht werden.Packaging that without the use of tools, such as. Knives, can openers etc., can be opened, i.e. so-called easy-open systems have been used in recent years because of the significant simplification of handling the consumer has become increasingly important. at Plastic film packaging is so-called tear strips known either in the film material are incorporated or subsequently on the filled Packaging by welding on at the same time Embossing.
Die bisher bekannten Systeme leiden vielfach daran, daß sie herstellungstechnisch schwierig zu handhaben sind. Besondere Probleme stellen sich in dieser Hinsicht z.B. bei der Herstellung zylindrischer Verpackungen, wie sie sowohl im Lebensmittel- als auch im Tierfutterbereich für wurstähnliche Produkte Verwendung finden.The previously known systems often suffer from the fact that they are technically difficult to handle. Special Problems arise in this regard e.g. in the Manufacture of cylindrical packaging as used in both Food and animal feed for sausage-like Find products.
Aus der US-A-4,840,270 ist eine Verpackung bekannt, in die eine Entnahmeöffnung gestanzt wird, die anschließend von einem teilweise abziehbaren Streifen überdeckt wird. Die hierfür angebrachten Schnitte sind gekrümmt und in sich geschlossen, um eine entsprechende Entnahmeöffnung zu definieren. Beim Abziehen des Abdeckstreifens wird unmittelbar eine vollständige Entnahmeöffnung freigelegt, aus der das Produkt entnommen werden kann.A packaging is known from US Pat. No. 4,840,270, into which a removal opening is punched which is then covered by a partially removable strip. The one for this attached cuts are curved and self-contained around a corresponding removal opening define. When the cover strip is pulled off, a complete one is immediately obtained Removal opening exposed from which the product can be removed.
Aus der EP 0 752 375 A1 (Stand der Technik im Sinne von Artikel 54 (3) und (4) EPÜ) ist eine Verpackung bekannt, bei der eine Perforation der Verpackungsfolie von einer Aufreißlasche überdeckt wird. Bei Anheben der Lasche reißt zunächst die Perforation und dann durch weiteren Zug an der Lasche die Folienverpackung so auf, daß eine Entnahmeöffnung freigelegt wird.From EP 0 752 375 A1 (prior art within the meaning of Article 54 (3) and (4) EPC) a package is known in which a perforation of the packaging film from a tear tab is covered. When the tab is lifted, the perforation tears first and then through Another pull on the tab on the film packaging so that a removal opening is exposed becomes.
Aufgabe der vorliegenden Erfindung ist es, die Nachteile des bekannten Standes der Technik zu überwinden und ein Verfahren zur Verfügung zu stellen, mit dem bei einer Verpackung aus Kunststoffolie zuverlässig ein Easy-Open-Konzept verwirklicht werden kann.The object of the present invention is to overcome the disadvantages to overcome the known prior art and a To provide procedures with which for packaging made of plastic film reliably an easy-open concept can be realized.
Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß die Kunststoffolie von der Rolle einer Schneidestation zugeführt wird, in der in einem der Größe der endgültigen Ver-packung angepaßten Takt Schnitte angebracht werden, die jeweils im wesentlichen geradlinig ausgebildet sind und deren Breite geringer als die Breite der Kunststoffolie ist und diese in der Dicke vollständig durchtrennen; daß im Bereich der Schnitte diese jeweils vollständig überdeckende Abdeckstreifen dichtend, aber abziehbar aufgebracht werden; und daß die so vorbereitete Kunststoffolie anschließend in an sich bekannter Art und Weise zur endgültigen Verpackung weiterverarbeitet wird.According to the invention this object is achieved in that the Plastic film fed from the roll to a cutting station will be in one of the size of the final packaging adapted clock cuts are attached, each of which is substantially rectilinear and their Width is less than the width of the plastic film and cut through the thickness completely; that in the area the cuts cover them completely Cover strips are applied in a sealing but removable manner; and that the plastic film prepared in this way in in a manner known per se for the final packaging is processed further.
Dabei ist es besonders bevorzugt, daß die Breite der Schnitte 1/4 bis 3/4, noch bevorzugter 1/3 bis 1/2, am bevorzugtesten etwa 1/3 der Breite der Kunststoffolie ausmacht.It is particularly preferred that the width of the Cuts 1/4 to 3/4, more preferably 1/3 to 1/2, on most preferably makes up about 1/3 of the width of the plastic film.
In einer bevorzugten Ausführungsform werden die Schnitte durch eine Anzahl von durch Stege getrennten Teilschnitten angebracht.In a preferred embodiment, the cuts by a number of partial cuts separated by webs appropriate.
Dabei kann, in einer Alternative, die Breite der Teilschnitte und/oder der Stege an verschiedenen Stellen der Schnitte gleich oder, in der zweiten Alternative, verschieden sein.In an alternative, the width of the Partial cuts and / or the webs in different places the cuts are the same or, in the second alternative, to be different.
Die Erfindung sieht weiterhin vor, daß eine eine Anzahl n von Teilschnitten umfassende erste Abfolge von Teilschnitten konstanter Breite alternierend mit einer eine Anzahl m von Teilschnitten umfassenden zweiten Abfolge von Teilschnitten konstanter Breite angebracht wird, wobei die Breite der zur ersten Abfolge zählenden Teilschnitte von der Breite der zur zweiten Abfolge zählenden Teilschnitte verschieden ist.The invention further provides that a number n first sequence of partial sections Partial cuts of constant width alternating with a one Number m of second sections comprising partial cuts Partial cuts of constant width is applied, the Width of the partial sections belonging to the first sequence of the width of the partial cuts belonging to the second sequence is different.
In einer bevorzugten Ausführungsform kann vorgesehen werden, daß n gleich 1 und m gleich 1 ist.In a preferred embodiment can be provided that n is 1 and m is 1.
In einer alternativen bevorzugten Ausführungsform kann vorgesehen werden, daß n gleich 1 und m gleich 2 ist. In an alternative preferred embodiment be provided that n is 1 and m is 2.
Als Kunststoffolie wird bevorzugt ein Laminat mit folgender Abfolge von Schichten verwendet: Polypropylen, ein- oder mehrschichtiges Polyamid, Polypropylen, wobei die Polyamid-Schicht bevorzugt entweder ein coextrudiertes Polyamid ist oder aus mindestens zwei Polyamid-Schichten besteht, wobei die eine Schicht aus einem Polyamid mit hohen Sperreigenschaften besteht, während die andere Schicht aus einem Polyamid mit hohem Schrumpfungsvermögen besteht.A laminate with the following is preferred as the plastic film Sequence of layers used: polypropylene, one or multilayer polyamide, polypropylene, with the polyamide layer is preferably either a coextruded polyamide or consists of at least two polyamide layers, wherein which is a layer of a polyamide with high barrier properties while the other layer is made of a polyamide with high shrinkage.
Als Material für den Abdeckstreifen wird bevorzugt ein Laminat verwendet, dessen innere, über dem Schnitten in der Kunststoffolie angeordnete Schicht aus einem adhäsiven abziehbaren Kunststoff besteht, bevorzugt aus einem Copolymer aus Polyethylen und Polypropylen.A is preferred as the material for the cover strip Laminate used, the inner one, above the cuts in the Plastic film arranged layer of an adhesive peelable plastic consists, preferably of a copolymer made of polyethylene and polypropylene.
Das Verfahren der vorliegenden Erfindung verwirklicht mehrere Vorteile, die - zumindest in dieser Kombination - bei Verfahren nach dem Stand der Technik bisher nicht verwirklicht worden sind. Zum einen ist es durch das Anbringen des Schnittes in der Kunststoffolie, wie diese von der Rolle zugeführt wird, d.h. vor weiterer Formgebung, z.B. zu einer zylindrischen "Wurstverpackung", problemlos möglich, den für die spätere Öffnung der Verpackung vorgesehenen Schnitt präzise an der richtigen Stelle anzubringen. Zum anderen ist eine nach dem erfindungsgemäßen Verfahren hergestellte Verpackung durch Abziehen des Abdeckstreifens über dem Schnitt und Aufbrechen der Verpackung durch Verformung derselben im Bereich des Schnittes besonders einfach zu öffnen und der Inhalt zu entnehmen.The method of the present invention realizes several Advantages that - at least in this combination - at Processes according to the prior art have not yet been implemented have been. Firstly, by attaching the Cut in the plastic film, like this from the roll is supplied, i.e. before further shaping, e.g. to a cylindrical "sausage packaging", possible without any problems cut intended for later opening of the packaging to attach precisely in the right place. On the other hand is a manufactured by the inventive method Packaging by pulling off the cover strip over the Cut and break up the packaging due to deformation the same particularly easy in the area of the cut open and remove the content.
Die geschilderten Vorteile kommen besonders zum Tragen, wenn die befüllte Verpackung einem Sterilationsprozeß unterzogen wird. Zum einen ist das beschriebene System ohne weiteres in der Lage den Temperaturen und Innendrücken bei einem derartigen Prozeß standzuhalten, zum anderen unterliegt das Verpackungsmaterial bei einer derartigen Wärmebehandlung einer Schrumpfung, was das Aufbrechen der Verpackung durch Verformung nach Abziehen des Abdeckstreifens über dem Schnitt weiter erleichtert. Die geschilderten Vorteile bei Verpackungen, die einem Sterilisationsprozeß unterzogen werden, sind mit bekannten Easy-Open-Systemen so nicht erreichbar.The advantages described are particularly noticeable, if the filled packaging undergoes a sterilization process is subjected. On the one hand, the system described is without able to withstand temperatures and internal pressures to withstand such a process, on the other the packaging material is subject to such Heat treatment of shrinkage, which is the breaking up of the Packaging by deformation after pulling off the Masking tape over the cut further facilitated. The Advantages described with packaging that one Sterilization process are known with Easy-Open systems not accessible.
Die Verwendung der bevorzugt vorgesehenen Materialien sowohl für die Kunststoffolie als auch für den Abdeckstreifen bringen dabei noch weitere Vorteile mit sich. Die besonders bevorzugte Laminat-Kunststoffolie bietet genügend Stabilität, daß durch den Abzug von der Rolle keine Dehnung und kein Weiterreißen des angebrachten Schnittes auftritt. Durch das Aufbringen des Abdeckstreifens unter Wärmeeinwirkung erfolgt nicht nur ein zuverlässig dichtender Verschluß des Schnittes, sondern darüber hinaus wird die obere Schicht des Laminat-Kunststoffes angeschmolzen und bildet einen zusätzlichen Verschluß des Schnittes in einem Teilbereich, so daß bei Abreißen des Abdeckstreifens das Produkt nicht unmittelbar freiliegt, durch leichtes Verformen der Verpackung aber ohne weiteres freigelegt werden kann.The use of the preferred materials both for the plastic film as well as for the cover strip bring even more advantages. The special preferred laminate plastic film offers enough Stability that no stretch due to the deduction from the roll and there is no tearing of the cut made. By applying the cover strip under The effect of heat is not only a reliable seal Closure of the cut, but beyond that melted the upper layer of the laminate plastic and forms an additional closure of the cut in a partial area so that when the cover strip is torn off the product is not immediately exposed due to light weight Deformation of the packaging is easily exposed can be.
Indem in einer bevorzugten Ausführungsform der Erfindung jeder der in einem der Größe der endgültigen Verpackung angepaßten Takt angebrachten Schnitte, dessen Breite geringer als die Breite der Kunststoffolie ist und der die Kunststoffolie vollständig durchtrennt, durch eine Anzahl von durch Stege getrennten Teilschnitten angebracht wird, wird allgemein eine erhöhte mechanische Stabilität der nach dem Verfahren herstellbaren Verpackung erreicht. Diese erhöhte mechanische Stabilität äußert sich auch im Abzugsverhalten während des Folientransportes in der Verpackungsmaschine dergestalt, daß damit ein Einsatz von dünneren Folien möglich wird. Darüber hinaus verringert sich die Gefahr des Weiterreißens der Folie. In a preferred embodiment of the invention each one in one of the size of the final packaging adapted stroke made cuts, its width is less than the width of the plastic film and the die Plastic film completely cut through by a number of partial cuts separated by webs, is generally an increased mechanical stability after achievable packaging achieved. This increased mechanical stability is also reflected in the Withdrawal behavior during film transport in the Packaging machine in such a way that it is used by thinner foils is possible. It also diminishes there is a risk of the film tearing.
Schließlich werden durch die höhere mechanische Stabilität im Abzugsverhalten Wellen der Folie im Bereich des Schnittes vermieden, wenn diese ausgehend von einer Schneidestation zu einer Siegeleinrichtung transportiert wird, bei der der aus einer Anzahl von durch Stege getrennten Teilschnitten bestehende Schnitt mit einem diesen vollständig überdeckenden Abdeckstreifen versiegelt wird, wobei der Abdeckstreifen zwar dichtend, aber abziehbar aufgebracht wird.Finally, due to the higher mechanical stability in the peeling behavior waves of the film in the area of the cut avoided when starting from a cutting station is transported to a sealing device at which that of a number of partial cuts separated by webs existing cut with this one completely covering cover strip is sealed, the Cover strips are applied in a sealing manner, but are removable becomes.
Gleichzeitig erhöht sich die Qualität der Siegelnaht durch die höhere Festigkeit. Zusätzlich wird der Heizenergiebedarf, der bei dem Aufsiegeln des Abdeckstreifens erforderlich ist, verringert.At the same time, the quality of the sealed seam increases the higher strength. In addition, the heating energy requirement, which is required when the cover strip is sealed is reduced.
Ein weiterer verfahrenstechnischer Vorteil besteht darin, daß indem der Schnitt durch eine Anzahl von durch Stege getrennten Teilschnitten angebracht wird, die Zuführung der für das Versiegeln erforderlichen Heizenergie von der dem Aufreißstreifen gegenüberliegenden Seite vereinfacht wird.Another procedural advantage is that by cutting through a number of through webs separate partial sections is attached, the feed of the heating energy required for sealing from the Tear strip opposite side is simplified.
Die durch das erfindungsgemäße Verfahren herstellbare Verpackung weist eine gegenüber Transportbeanspruchung höhere mechanische Stabilität auf, was nicht nur zu einer Verringerung der durch Transportschäden bedingten Produktverluste führt, sondern, besonders wenn es sich um verderbliche Produkte handelt, das Risiko mikrobiellen Verderbs verringert.The packaging that can be produced by the method according to the invention shows a higher compared to transport stress mechanical stability, which not only leads to a reduction the product loss caused by transport damage leads, but especially if it is perishable Products, reduces the risk of microbial spoilage.
Es ist im Rahmen der vorliegenden Erfindung, daß die Breite des durch zwei Stege begrenzten Teilschnittes größer oder kleiner oder gleich der Breite eines Steges ist.It is within the scope of the present invention that the width of the partial cut delimited by two webs larger or is less than or equal to the width of a web.
Die Erfindung wird detaillierter anhand der beigefügten
Zeichnungen in der nachfolgenden Beschreibung von Ausführungsbeispielen
veranschaulicht. Dabei zeigt
Wie aus FIG. 1 ersichtlich, wird die für die Verpackung zu
verwendende Kunststoffolie 10 von einer Vorratsrolle über
der Vergleichmäßigung des Folienlaufes dienende Walzen
(nicht dargestellt) einer Schneidestation 20 zugeführt. In
der Schneidestation 20 erfolgt die Anbringung eines
Schnittes 11 mittels eines Schneidewerkzeugs 25. Vorteilhafterweise
wird dabei der Schnitt 11 mittig in der Folie
10 angebracht, wobei die Breite des Schnittes 11 so zu
wählen ist, daß - in Abhängigkeit vom verwendeten Kunststoffmaterial
- durch den weiteren Abzug der Folie eine
Dehnung oder ein Weiterreißen des Schnittes vermieden wird.
Wesentlich ist, daß der Schnitt 11 nicht nur eine
Schwächung des Kunststoffmaterials bewirkt, sondern dieses
vollständig durchtrennt.As shown in FIG. 1 can be seen for packaging
using
In der nachfolgenden Station 30 zur Aufbringung der Abdeckstreifen
15 werden diese nach einer an sich bekannten
Technik hergestellt, zugeführt und aufgebracht. Dabei erfolgt
zunächst eine Zuführung von einer Vorratsrolle 32 zu
einer Schneidestation 34, in der Abdeckstreifen 15 in gewünschter
Breite, z.B. 6 bis 12 mm, hergestellt werden.
Diese Abdeckstreifen werden durch ein Vakuum auf einem
Stempel 35 einer Siegeleinrichtung 36 fixiert. Anschließend
wird die Siegeleinrichtung 36 um 180° gedreht und der mit
Vakuum fixierte Abdeckstreifen 15 auf dem nächsten zugeführten
Schnitt 11 in der Kunststoffolie 10 bei einer
Temperatur von ca. 210°C so aufgesiegelt, daß der Schnitt
vollständig abdichtend abgedeckt ist.In the
Anschließend wird in dem dargestellten Beispiel die Verpackung einer an sich bekannten Schlauchbildungs- und Abfüllstation (nicht dargestellt) zugeführt, in der z.B. ein wurstähnliches Produkt hergestellt wird.Then, in the example shown, the packaging a known hose forming and filling station (not shown) in which e.g. on sausage-like product is produced.
Wie aus FIG. 2 ersichtlich, besteht das erfindungsgemäß
bevorzugte Material aus zwei Schichten Polypropylen 12,
12', zwischen denen eine ein- oder mehrschichtige Polyamidschicht
13 angeordnet ist, wobei die Polyamidschicht ein
coextrudiertes Polyamid sein oder aus zwei Polyamidschichten
13', 13'' bestehen kann, wovon die obere, d.h. die der
äußeren Polypropylen-Schicht 12 zugewandte Schicht 13' aus
einem Polyamid mit hohen Sperreigenschaften besteht, während
die untere, d.h. die der inneren Polypropylen-Schicht
12' zugewandte Schicht 13'' aus einem Polyamid mit hohen
Schrumpfungseigenschaften besteht. Durch einen derartigen
Aufbau des Kunststoffmaterials kann ein Verpackungsmaterial
zur Verfügung gestellt werden, das zum einen hervorragende
Sperreigenschaften gegenüber Sauerstoff und Wasserdampf
aufweist und darüber hinaus auf der Polyamidschicht optimal
bedruckbar ist.As shown in FIG. 2 can be seen, this is according to the invention
preferred material from two layers of
Selbstverständlich kann die Reihenfolge der Polyamid-Schichten
13' und 13" auch umgekehrt sein.Of course, the order of the
Über dem Schnitt 11 wird ein diesen vollständig in der
Breite und Länge überdeckender Abdeckstreifen 15 angebracht,
der bevorzugt ebenfalls als Laminat aufgebaut ist.
Dabei ist darauf zu achten, daß die dem Schnitt zugewandte
Schicht 16 des Laminats die notwendigen Adhäsionseigenschaften
besitzt, d.h. fest über dem Schnitt fixiert werden
kann, gleichzeitig aber optimal peelbar, d.h. abziehbar
ist.Over the
Als besonders bevorzugt hat sich hierbei ein Copolymer aus
Polyethylen und Polypropylen erwiesen. Die darüber angeordneten
Schichten 17, 18 sind in ihrer Zusammensetzung
weniger kritisch. Im dargestellten Ausführungsbeispiel kann
es sich dabei um eine PET-Schicht 17 und eine abschließende
Polypropylen-Schicht 18 handeln, wobei allerdings auch
andere Materialien denkbar sind.A copolymer of is particularly preferred
Polyethylene and polypropylene proved. The arranged above
Bei Aufsiegeln des Abdeckstreifens 15 über dem Schnitt 11
erfolgt durch die Temperatureinwirkung ein Anschmelzen der
äußeren Polypropylenschicht 12 der Laminat-Kunststoffolie
10, so daß ein zusätzlicher schwacher Verschluß 19 im äußeren
Bereich des Schnittes 11 erfolgt. Dadurch ist gewährleistet,
daß auch nach Abziehen des Abdeckstreifens 15
nicht sofort Produkt aus dem Inneren der Verpackung austritt.
Eine leichte Verformung der Verpackung führt aber zu
einem sofortigen Aufbrechen im Schnittbereich, wodurch ein
leichtes Öffnen und Entleeren der Verpackung ermöglicht
wird.When the
FIG. 3 zeigt einen aus einer Abfolge von durch Stege 11a
konstanter Breite getrennten Teilschnitten 11b konstanter
Breite bestehenden Schnitt, wobei die Breite der Teilschnitte
ein Vielfaches der Breite der die Teilschnitte
trennenden Stege beträgt.FIG. 3 shows one of a sequence of
FIG. 4 zeigt eine Schnittausführung, bei der die Breite der
Teilschnitte 11b in etwa der Breite der zwischen den
Teilschnitten angeordneten Stege 11a entspricht.FIG. 4 shows a sectional design in which the width of the
FIG. 5 zeigt eine Ausführungsform der Schnittausführung,
bei der die Breite der zwischen den Teilschnitten 11b angeordneten
Stege 11a kleiner ist als die Breite der Teilschnitte,
wobei die Teilschnitte aus einer alternierenden
Abfolge von Teilschnitten besteht, wobei wiederum die
Breite eines Teilschnittes größer bzw. kleiner als diejenige
des folgenden Teilschnittes ist.FIG. 5 shows an embodiment of the cut design,
in which the width of the arranged between the
FIG. 6 zeigt eine Ausführungsform der Schnittausführung,
bei der eine Abfolge 11c bestehend aus zwei Teilschnitten
mit einer Abfolge 11d aus einem Teilschnitt alternierend
angebracht wird. Die in der ersten Abfolge umfaßten Teilschnitte
weisen eine zueinander gleiche Breite auf, sind
jedoch gegenüber der Breite des in der zweiten Abfolge
umfaßten Teilschnittes kürzer. Die Breite der zwischen den
verschiedenen Abfolgen angeordneten Stege ist über die
gesamte Schnittbreite in etwa konstant. Dabei kann die
Breite der zwischen den Teilschnitten der ersten Abfolge
angeordneten Stege in etwa gleich sein der Breite der zwischen
den Teilschnitten der zweiten Abfolge angeordneten
Stege.FIG. 6 shows an embodiment of the cut design,
in which a sequence 11c consisting of two partial cuts
alternating with a
In FIG. 7 ist schließlich eine Schnittausführung dargestellt, die ähnlich der in FIG. 4 dargestellten Schnittausführung ist, wobei jedoch sowohl die Breite der Stege als auch die der Teilschnitte wesentlich verringert ist, so daß im vorliegenden Fall eine Perforationslinie ausgebildet wird.In FIG. 7 shows a sectional design, which are similar to that shown in FIG. 4 shown cut execution is, however, both the width of the webs as well as that of the partial cuts is significantly reduced, so that a perforation line is formed in the present case becomes.
Das erfindungsgemäße Verfahren eignet sich in besonderer Weise für die Herstellung von zylindrischen Verpackungen in Wurstform, wobei es sich hierbei entweder um Wurstprodukte für den Lebensmittelbereich handeln kann oder um wurstförmig dargebotene Tiernahrungsprodukte, wie bspw. eine sogenannte Hundewurst, wobei im letzteren Fall die Füllung aus einem feuchten bis halbfeuchten stückigen Hundefutter bestehen kann. Andere Anwendungsformen sind denkbar, da durch das erfindungsgemäße Verfahren ein Easy-Open-Konzept zur Verfügung gestellt wird, das bei vielen Arten von Verpackungen Vorteile bietet. The method according to the invention is particularly suitable Way for the production of cylindrical packaging in Sausage form, which is either a sausage product can act for the food sector or around sausage-presented animal food products, such as a so-called dog sausage, the latter being the Filling from a moist to semi-moist chunky dog food can exist. Other uses are conceivable, because the inventive method an easy-open concept is made available to many Types of packaging offers advantages.
Die in der vorstehenden Beschreibung, in der Zeichnung sowie in den Ansprüchen offenbarten Merkmale der Erfindung können sowohl einzeln als auch in beliebiger Kombination für die Verwirklichung der Erfindung in ihren verschiedenen Ausführungsformen wesentlich sein.The in the above description, in the drawing as well as features of the invention disclosed in the claims can be used individually or in any combination for realizing the invention in its various Embodiments may be essential.
Claims (17)
- Method for producing a packaging which is made essentially of plastic material film (10), having means for opening the packaging without the aid of a tool, the plastic material film (10) being supplied from the roller of a cutting station (20) in which cuts (11) are applied in a cycle adapted to the size of the final packaging, the width of said cuts being smaller than the width of the plastic material film (10) and cutting through the latter entirely in thickness, cover strips (15), which respectively overlap said cuts completely, being applied in the region of the cuts (11) so as to form a seal but to be strippable and the thus prepared plastic material film (10) then being further processed in a manner known per se for final packaging, characterised in that the cuts (11) are configured respectively essentially linearly.
- Method according to claim 1, characterised in that the width of the cuts (11) amounts to 1/4 to 3/4 of the width of the plastic material film (10).
- Method according to claim 2, characterised in that the width of the cuts (11) amounts to 1/3 to 1/2 of the width of the plastic material film (10).
- Method according to claim 3, characterised in that the width of the cuts (11) amounts approximately to 1/3 of the width of the plastic material film (10).
- Method according to one of the preceding claims, characterised in that the cuts (11) are applied by a number of partial cuts (11b) which are separated by webs (11a).
- Method according to claim 5, characterised in that the width of the partial cuts (11b) and/or of the webs (11a) is the same at different positions of the cuts (11).
- Method according to claim 5, characterised in that the width of the partial cuts (11b) and/or of the webs (11a) is different at different positions of the cuts (11).
- Method according to one of the claims 5 to 7, characterised in that a first sequence of partial cuts (11b) of a constant width, comprising a number n of partial cuts (11b), is applied alternating with a second sequence of partial cuts of a constant width, comprising a number m of partial cuts (11b), the width of the partial cuts (11b) involved in the first sequence being different from the width of the partial cuts involved in the second sequence.
- Method according to claim 8, characterised in that n equals 1 and m equals 1,
- Method according to claim 8, characterised in that n equals 1 and m equals 2.
- Method according to one of the preceding claims, characterised in that a laminate with the following sequence of layers is used as the plastic material film (10): polypropylene (12), a single layer or multi-layer polyamide (13; 13', 13"), polypropylene (12').
- Method according to claim 11, characterised in that the polyamide layer (13) is a coextruded polyamide.
- Method according to claim 11, characterised in that the polyamide layer (13) comprises at least two polyamide layers (13', 13"), the one layer (13') being made of a polyamide with high sealing properties, whereas the other layer (13") is made of a polyamide with a high shrinkage capacity.
- Method according to one of the preceding claims, characterised in that a laminate is used as the material for the cover strip (15), the inner layer (16) of said laminate, which is disposed above the cuts in the plastic material film, being made of an adhesive strippable plastic material.
- Method according to claim 14, characterised in that the inner layer (16) is made of a copolymer of polyethylene and polypropylene.
- Method according to one of the preceding claims, characterised in that the application of the cover strips (15) is effected under the influence of temperature.
- Packaging, produceable by a method according to any of the preceding claims.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1996124042 DE19624042C2 (en) | 1996-06-17 | 1996-06-17 | Process for producing a packaging and packaging which can be produced thereafter |
| DE19624042 | 1996-06-17 | ||
| DE19634759 | 1996-08-28 | ||
| DE19634759A DE19634759C2 (en) | 1996-06-17 | 1996-08-28 | Process for producing a packaging and packaging which can be produced thereafter |
| PCT/DE1997/001293 WO1997048607A1 (en) | 1996-06-17 | 1997-06-17 | Process for production of opening means for a package |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0912400A1 EP0912400A1 (en) | 1999-05-06 |
| EP0912400B1 true EP0912400B1 (en) | 2002-01-30 |
| EP0912400B2 EP0912400B2 (en) | 2005-08-03 |
Family
ID=26026633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97932703A Expired - Lifetime EP0912400B2 (en) | 1996-06-17 | 1997-06-17 | Process for production of opening means for a package |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0912400B2 (en) |
| AU (1) | AU715834B2 (en) |
| CA (1) | CA2258645A1 (en) |
| DE (2) | DE19634759C2 (en) |
| DK (1) | DK0912400T3 (en) |
| NO (1) | NO985859D0 (en) |
| NZ (1) | NZ333794A (en) |
| WO (1) | WO1997048607A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10338244A (en) * | 1997-06-03 | 1998-12-22 | Houseki Planning:Kk | Sealed bag with tape stuck thereto and its production |
| ATE440032T1 (en) | 2004-04-30 | 2009-09-15 | Bosch Gmbh Robert | METHOD FOR PRODUCING TUBULAR BAGS |
| US7216764B2 (en) * | 2004-08-16 | 2007-05-15 | Sealstrip Corporation | Easy-open packages |
| FI121371B (en) * | 2008-12-05 | 2010-10-29 | Lamican Oy | Method and apparatus for placing a sealing strip |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4840270A (en) * | 1987-12-21 | 1989-06-20 | Nice-Pak Products, Inc. | Re-sealable label flap |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE644299A (en) * | 1963-02-25 | |||
| SE329968B (en) * | 1964-01-16 | 1970-10-26 | Tetra Pak Int | |
| DE3828355A1 (en) * | 1988-08-20 | 1990-02-22 | Hoechst Ag | Multilayer packaging film containing a gas barrier |
| DE4041743A1 (en) * | 1990-12-24 | 1992-06-25 | Schickedanz Ver Papierwerk | Continuous mfr. of resealable film packaging - by punching openings in film covered by label before contact and welding along long edges with second film |
| DE4238127A1 (en) † | 1992-11-12 | 1994-05-19 | Wolff Walsrode Ag | Multi-layer coextruded, shrinkable stretched tubular film |
| SE502181C2 (en) * | 1994-02-18 | 1995-09-11 | Tetra Laval Holdings & Finance | Method and apparatus for transferring patches to a running material web |
| FR2736330B1 (en) * | 1995-07-05 | 1997-08-22 | Techmay Sa | PROCESS FOR PACKAGING WITH TEARABLE FILM AND PACKAGE OBTAINED |
-
1996
- 1996-08-28 DE DE19634759A patent/DE19634759C2/en not_active Expired - Fee Related
-
1997
- 1997-06-17 WO PCT/DE1997/001293 patent/WO1997048607A1/en active IP Right Grant
- 1997-06-17 DE DE59706253T patent/DE59706253D1/en not_active Expired - Fee Related
- 1997-06-17 NZ NZ333794A patent/NZ333794A/en unknown
- 1997-06-17 DK DK97932703T patent/DK0912400T3/en active
- 1997-06-17 AU AU36186/97A patent/AU715834B2/en not_active Ceased
- 1997-06-17 EP EP97932703A patent/EP0912400B2/en not_active Expired - Lifetime
- 1997-06-17 CA CA002258645A patent/CA2258645A1/en not_active Abandoned
-
1998
- 1998-12-14 NO NO985859A patent/NO985859D0/en not_active Application Discontinuation
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4840270A (en) * | 1987-12-21 | 1989-06-20 | Nice-Pak Products, Inc. | Re-sealable label flap |
Also Published As
| Publication number | Publication date |
|---|---|
| NZ333794A (en) | 2000-08-25 |
| DE19634759C2 (en) | 2003-11-06 |
| EP0912400B2 (en) | 2005-08-03 |
| AU3618697A (en) | 1998-01-07 |
| NO985859L (en) | 1998-12-14 |
| NO985859D0 (en) | 1998-12-14 |
| AU715834B2 (en) | 2000-02-10 |
| WO1997048607A1 (en) | 1997-12-24 |
| DE59706253D1 (en) | 2002-03-14 |
| DE19634759A1 (en) | 1998-03-05 |
| CA2258645A1 (en) | 1997-12-24 |
| EP0912400A1 (en) | 1999-05-06 |
| DK0912400T3 (en) | 2002-05-13 |
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