DE2821435A1 - Oxidising selected zones of welded plastics packaging film or laminate - by corona discharge or gas-flaming to improve sealing and opening - Google Patents
Oxidising selected zones of welded plastics packaging film or laminate - by corona discharge or gas-flaming to improve sealing and openingInfo
- Publication number
- DE2821435A1 DE2821435A1 DE19782821435 DE2821435A DE2821435A1 DE 2821435 A1 DE2821435 A1 DE 2821435A1 DE 19782821435 DE19782821435 DE 19782821435 DE 2821435 A DE2821435 A DE 2821435A DE 2821435 A1 DE2821435 A1 DE 2821435A1
- Authority
- DE
- Germany
- Prior art keywords
- electrodes
- welding
- opening
- electrode
- oxide layer
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
- B31B50/60—Uniting opposed surfaces or edges; Taping
- B31B50/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure, e.g. by welding
- B31B50/66—Uniting opposed surfaces or edges; Taping by applying heat or pressure, e.g. by welding by high-frequency electric heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/004—Preventing sticking together, e.g. of some areas of the parts to be joined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
- B29C59/08—Surface shaping of articles, e.g. embossing; Apparatus therefor by flame treatment ; using hot gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
- B29C59/10—Surface shaping of articles, e.g. embossing; Apparatus therefor by electric discharge treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/76—Making non-permanent or releasable joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
- B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
- B29C66/7232—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
- B29C66/72321—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of metals or their alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
- B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
- B29C66/7232—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
- B29C66/72327—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of natural products or their composites, not provided for in B29C66/72321 - B29C66/72324
- B29C66/72328—Paper
-
- 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
- B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
- B65B51/10—Applying or generating heat or pressure or combinations thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T19/00—Devices providing for corona discharge
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/06—PE, i.e. polyethylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
- B31B50/60—Uniting opposed surfaces or edges; Taping
- B31B50/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure, e.g. by welding
Abstract
Description
Verfahren und Vorrichtung zum Ver- Method and device for
schweißen der Ränder einer Füllöffnung eines Sackes, Behälters o.dgl. aus thermoplastischem Kunststoff Zur Herstellung von Säcken, Beuteln, Bechern oder dgl. Behältern ist es bekannt, aus einer Kunststofffolie oder aus einem Verbundwerkstoff bestehende Flachbahnen zu verwenden. Aus diesen Flachbahnen werden die genannten Behälter geschweißt. Nachdem die Behälter gefüllt sind, werden die Öffnungsränder der Füllöffnung miteinander verschweißt. Es ist das Ziel, eine gute Verschlußnaht zu erreichen, damit das Füllgut durch die Füllöffnung nicht entweichen kann oder verdirbt. Andererseits strebt man ein leichtes Öffnen oder ein leichtes Teilöffnen der verschlossenen Füllöffnung an, sofern das Füllgut verbraucht werden soll. weld the edges of a filling opening of a bag, container or the like. Made of thermoplastic material For the production of sacks, bags, cups or Like. Containers, it is known from a plastic film or from a composite material to use existing flat tracks. These flat tracks become the ones mentioned Welded container. After the containers are filled, the edges of the openings the filling opening welded together. The goal is to have a good locking seam to achieve so that the product cannot escape through the filling opening or spoils. On the other hand, one strives for easy opening or easy partial opening the closed filling opening if the filling material is to be used up.
Es sind Milchverpackungen bekannt, die aus einem Verbundmaterial bestehen, das sich aus einer Papierlage, einer Polyäthylenschicht, einer Alufolie und einer Polyäthylienfolie zusammensetzt. Wenn man eine derartige Verpackung öffnen will, muß man Hilfswerkzeuge, wie Messer, Schere o.dgl. einsetzen.There are milk packaging known, which consist of a composite material, which consists of a paper layer, a polyethylene layer, an aluminum foil and a Composed of polyethylene film. If you want to open such a package, do you need auxiliary tools, like knife, scissors or the like. insert.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung zu gestalten, mit dem bzw. mit der es möglich ist, die Verschlußnaht einer Füllöffnung eines aus thermoplastischem Material oder unter Verwendung eines thermoplastischen Materials gefertigten Behälters so auszubilden, daß einerseits das Füllgut gegen Verlust und Verderben geschützt ist und andererseits ein leichtes Öffnen der Füllöffnung ohne Anwendung von Hilfswerkzeugen möglich wird.The invention is based on the object of a method and a device to design, with which or with which it is possible, the sealing seam of a filling opening one made of thermoplastic material or using a thermoplastic Material made container so that on the one hand the product against Loss and spoilage is protected and on the other hand easy opening of the filling opening becomes possible without the use of auxiliary tools.
Diese Aufgabe wird nach der Erfindung dadurch gelöst, daß vor dem Legen der Verschlußnaht mindestens ein Teilbereich der zu verschweißenden Flächen der Öffnungsrandcr der Fullöffnung mit einer Oxydschicht versehen wird.This object is achieved according to the invention in that before Place the sealing seam at least a portion of the surfaces to be welded the opening edge of the filling opening is provided with an oxide layer.
Oxydschichten verhindern sowohl bei Metall als auch bei Thermoplasten ein einwandfreies Verschweißen. Je nach der gewählten Intensität der Oxydation wird die Festigkeit der Schweißstelle herabgesetzt.Oxide layers prevent both metal and thermoplastics perfect welding. Depending on the chosen intensity of the oxidation the strength of the weld is reduced.
Die herabgesetzte Festigkeit kann sich auch über die gesamte Länge der Schweißnaht erstrecken.The reduced strength can also extend over the entire length extend the weld.
Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und werden im folgenden beschrieben. Es zeigen: Fig. 1 den Aufbau eines Verbundmaterials, das für die Fertigung von Behältern benutzt werden kann, Fig. 2 einen nach dem erfindungsgem§ßen Verfahren hergestellten Behälter in perspektivischer Darstellung, Fig. 3 eine Flachbahn, die partiell mit Oxydschichten versehen ist, Fig. 4 einen Behälter in schaubildlicher Darstellung, dessen Verschlußnaht im mittleren Bereich mit einer Schweißschwachstelle versehen ist, Fig. 5 eine Vorrichtung zur Durchführung des erfindungsgemäßen Verfahrens in schematischer Darstellung, Fig. 6 und 7 Vorrichtungen, bei denen die Schweißbakken als Elektroden zur Erzeugung einer Oxydschicht auf einem Teilbereich der Werkstoffbahn ausgebildet sind.Embodiments of the invention are shown in the drawings and are described below. 1 shows the structure of a composite material, which can be used for the manufacture of containers, Fig. 2 shows one according to the invention The container produced by the method in a perspective view, FIG. 3 shows a flat web, which is partially provided with oxide layers, 4 shows a container in a diagrammatic representation, the closure seam in the middle area with a Weld weak point is provided, Fig. 5 shows a device for performing the Method according to the invention in a schematic representation, FIGS. 6 and 7 devices, in which the welding jaws act as electrodes for generating an oxide layer on one Part of the material web are formed.
In der Fig. 1 ist eine Flachbahn dargestellt, die aus einem Verbundmaterial gefertigt ist und zur Herstellung von Beuteln oder Behältern verwendet werden kann. Die Bezugszahl 1 ist einer Papierlage zugeordnet, die als Aussenhülle dient. Um die Papierlage 1 mit einer Aluminiumfolie 3 zu verbinden, ist zwischen den beiden Lagen eine Schicht eines Haftvermittlers 2 aus einem Polyäthylenthermoplast vorgesehen. Die Aluminiumfolie 3 ist gas- und flüssigkeitsdicht. Das Verbundmaterial weist ferner eine Polyäthylenfolie 4 auf, die als sogenanntes Schweißmedium dient, damit aus dem bahnförmigen Verbundmaterial Beutel oder Behälter durch Schweißen hergestellt werden können.In Fig. 1, a flat web is shown, which is made of a composite material and can be used to make bags or containers. The reference number 1 is assigned to a paper layer which serves as an outer cover. Around to connect the paper layer 1 with an aluminum foil 3 is between the two Layers provided a layer of an adhesion promoter 2 made of a polyethylene thermoplastic. The aluminum foil 3 is gas- and liquid-tight. The composite material also has a polyethylene film 4, which serves as a so-called welding medium, so from the web-shaped composite material bags or containers produced by welding can be.
In der Fig. 2 ist ein Behälter aufgezeigt, devaus einem Verbundmaterial nach der Fig. 1 gefertigt wurde. Dieser Behälter 5 weist eine Verschlußschweißnaht 6 auf, die im Bereich 7 mit einer Oxydschicht versehen ist. Diese Oxydschicht bildet eine Schweißschwachstelle, so daß in diesem Bereich ein Öffnen des Behälters ohne Zuhilfenahme von Hilfswerkzeugen möglich ist.FIG. 2 shows a container made from a composite material according to FIG. 1 was manufactured. This container 5 has a sealing weld seam 6, which is provided with an oxide layer in area 7. This oxide layer forms a weld weak point, so that in this area the container can be opened without Use of auxiliary tools is possible.
Die zur Erzeugung einer Schweißschwachstelle erforderlichen Oxydschichten werden vorzugsweise auf die Flachbahn aufgebracht, bevor durch Schweißen aus dieser Flachbahn der Behälter hergestellt wird.The oxide layers required to create a weld weak point are preferably applied to the flat web before welding from this Flat sheet of the container is made.
In der Fig. 3ist eine aus Verbundmaterial nach der Fig. 1 gefertigte Flachbahn, die in den Bereichen 8 und 9 mit einer Oxydschicht versehen ist.In FIG. 3, one made of composite material according to FIG. 1 is shown Flat track, which is provided with an oxide layer in areas 8 and 9.
In der Fig. 4 ist ein Behälter 10 dargestellt, dessen Öffnungsränder 11 verschweißt wurden. Zuvor wurden im Bereich 12 die zu verbindenden Flächen der Öffnungsränder mit einer Oxydschicht versehen, so daß im Bereich 12 eine Schweißschwachstelle vorliegt. In diesem Bereich kann die Füllöffnung z.B. über einen Strohhalm 13 geöffnet werden, der in die Schweißschwachstelle gestoßen wird und über den dann der Inhalt des Behälters ausgesaugt werden kann. Die Schweißschwachstelle kann an einem beliebigen Punkt der Verschlußnaht vorgesehen werden.In Fig. 4, a container 10 is shown, the opening edges 11 were welded. Previously, the areas to be connected were in area 12 of the The edges of the opening are provided with an oxide layer, so that a weld weak point in the area 12 is present. In this area the filling opening can be opened via a straw 13, for example that is pushed into the weld weak point and then the content the container can be sucked out. The weld weak point can be at any Point of the sealing seam are provided.
In der Fig. 5 ist eine Vorrichtung zur Durchüfhrung des erfindungsgemäßen Verfahrens aufgezeigt, Uber die eine partielle Oxydation an den schweißfähigen Oberflächen von Thermoplasten erzielt werden kann. Diese Vorrichtung arbeitet mit elektrischen Koronaentladungen. Durch das in der elektrischen Koronaentladung entstehende Ozon einerseits und durch die Korona selbst findet eine Oxydation an den Oberflächen von Materialien statt. Die Art der Elektroden und die Koronasteuerung durch den Generator erlauben eine gezielte partielle Behandlung. Durch die Regelbarkeit des Generators kann man die Intensität der Oxydation kontinuierlich in Abahängigkeit zu der Bewegungsgeschwindigkeit von Produktionsmaschinen steuern.In Fig. 5 is a device for performing the invention Method shown, about which a partial oxidation on the weldable surfaces can be achieved by thermoplastics. This device works with electrical Corona discharges. Due to the ozone generated in the electrical corona discharge on the one hand, and through the corona itself, there is oxidation on the surfaces of materials instead. The type of electrodes and the corona control by the Generators allow targeted partial treatment. The controllability of the The generator can be continuously dependent on the intensity of the oxidation to control the speed of movement of production machines.
Bei der Vorrichtung nach der Fig. 5 wird die partiell zu oxydierende Werkstoffbahn 5a über eine an Masse liegende Walzenelektrode 14 geführt. In einer geeigneten Lage sind die Gegenelektroden 15 angeordnet, an denen sich beim Anlegen einer Hochspannung die Korona 16 entwickelt. Die hochfrequente Hochspannung, die zum Aufbau der Korona 16 benötigt wird, wird an einem Transformatior 17 über einen Generator 18 erzeugt. Die erzeugte Hochspannung wird einer Führungselektrode 19 zugeführt, von der die Gegenelektroden 15 ihre Versorgungsspannung zum Aufbau der Korona ableiten. Die Gegenelektroden 15 besitzen ein Dielektrikum 20, das bei elektrischem Durchschlag nicht kohlenstoffbildend ist. Damit die partielle Oxydation an geeigneter Stelle an der Oberfläche der zu verschweißenden Materialien erfolgt, wird ein Impulsgeber 21 als Signalschaltelement vorgesehen. Neben dieser Einschaltmöglichkeit und somit positonsgerechter Oxydation kann eine weitere Anpassung durch Verschieben der zu oxydierenden Matedalbahn in oder gegen die Laufrichtung des zu erstellenden Produktes oder quer zur Laufrichtung des zu erstellenden Produktes oder durch eine Verschiebung des Elektrodensystems erfolgen. Das Elektrodensystem kann in Längsrichtung und/oder in Querrichtung der Werkstoffbahn verschiebbar gelagert sein.In the device according to FIG. 5, the is to be partially oxidized The material web 5a is guided over a roller electrode 14 which is connected to the ground. In a In a suitable position, the counter-electrodes 15 are arranged on which, when applied a high voltage the corona 16 develops. The high frequency high voltage that to build up the corona 16 is required on a transformer 17 via a Generator 18 generated. The generated high voltage is applied to a lead electrode 19 fed from which the counter electrodes 15 their supply voltage to build up the Derive corona. The counter electrodes 15 have a dielectric 20, which is electrical Breakdown is not carbon-forming. So that the partial oxidation is more suitable Place takes place on the surface of the materials to be welded, a pulse generator 21 provided as a signal switching element. In addition to this switch-on option and thus Position-appropriate oxidation can be a further adjustment by moving the to oxidizing Matedalbahn in or against the direction of the product to be created or at right angles to the running direction of the product to be created or by a shift of the electrode system. The electrode system can be in the longitudinal direction and / or be mounted displaceably in the transverse direction of the material web.
Die mit dem erfindungsgemäßen Verfahren erzeugte partielle Oxydation der zu verbindenden Flächen der Öffnungsränder des Sackes oder der Behälter kann auch mit einer Gasflamme erzielt werden. Im Gegensatz zu der elektrischen Koronabehandlung können bei der Gasbeflammung die Behandlungsumrisse nicht so exakt eingehalten werden. Auch die Steuerbarkeit des Oxydationsgrades ist im Falle der Gasbeflammung ungünstig.The partial oxidation produced by the method according to the invention of the surfaces to be connected of the opening edges of the sack or the container can also be achieved with a gas flame. In contrast to the electrical corona treatment the treatment outlines cannot be adhered to so precisely in the case of gas flaming. The controllability of the degree of oxidation is also unfavorable in the case of gas flaming.
In den Fig. 6 und 7 sind Vorrichtungen aufgezeigt, bei denen die Schweißbacken als Elektroden zur Erzeugung einer Oxydschicht auf einem oder mehreren Teilbereichen einer Werkstoffbahn mittels Koronaentladungen ausgebildet sind.In Figs. 6 and 7 devices are shown in which the welding jaws as electrodes for producing an oxide layer on one or more partial areas a material web are formed by means of corona discharges.
In der Fig. 6 wurde die Werkstoffbahn 5a über einen zylinderförmigen Hohlkörper 22 gespannt und mit einer Längsschweißnaht 23 versehen. Innerhalb des Hohlkörpers ist eine Gegenelektrode 24 vorgesehendigit einem Dielektrikum ausgerüstet ist. Die ausserhalb des Hohlkörpers angeordnete Schweißbacke 28 wird elektrisch über Anschlüsse 25 beheizt und liegt im Punkt 26 an Masse. Sofern an die Gegenelektrode über die Leitung 27 eine hochfrequente Hochspannung gelegt wird, wird bei einem Bewegen der Schweißbacke 28 in Richtung auf die Gegenelektrode 24 eine Koronaentladung 16 erzeugt, über die eine partielle Oxydation an den zu verbindenden Rändern erreicht wird.In Fig. 6, the material web 5a was over a cylindrical Hollow body 22 stretched and provided with a longitudinal weld seam 23. Within the Hollow body, a counter electrode 24 is provided with a dielectric is. The welding jaw 28 arranged outside the hollow body becomes electrical Heated via connections 25 and is grounded at point 26. If to the counter electrode A high-frequency high voltage is placed across the line 27, is a Moving the welding jaw 28 in the direction of the counter electrode 24 causes a corona discharge 16 generated through which a partial oxidation is achieved at the edges to be joined will.
Im Bereich dieser Oxydationsschicht wird beim anscHleßenden Verschweißen der Ränder eine Schweißschwachstelle erzielt. Die Größe dieser Schweißschwachstelle entspricht den Ab$messungen der Gegenelektrode 24. Auch die Lage der Schweißschwachstelle wird durch die Lage der Gegenelektrode bestimmt.In the area of this oxidation layer during subsequent welding the edges achieved a weld weak point. The size of this weld weak point corresponds to the dimensions of the counter electrode 24. Also the position of the weld weak point is determined by the position of the counter electrode.
In der Fig. 7 ist eine Vorrichtung aufgezeigt, die in ihrer Wirkweise mit der nach der Fig. 6 übereinstimmt. Mit der Vorrichtung nach der Fig. 7 werden keine rohrf5r.igen Behälter, sondern Flachbeutel hergestellt. Die elektrisch aufheizbare und an Masse liegende Schweißbacke 2S bildet mit der Gegenelektrode 24 ein Elektrodensystei, Fieber das beim Anlagen der Hochspannung über die Leitung 27 eine Koronaentladung 16 erzeugt wird. Nachdem über diese oronaentladung eine partielle Oxydation der zu verbindenden Öffnungsränder des Flachbeutels erreicht ist, erfolgt den Verschweißen der Offnungsränder über ihre ges#te Lng-.7 shows a device which, in its mode of operation with that of FIG. 6 coincides. With the device according to FIG no tubular containers, but flat bags. The electrically heated one and the welding jaw 2S, which is connected to the ground, forms an electrode system with the counter electrode 24, Fever that a corona discharge when the high voltage is applied via line 27 16 is generated. After over this orona discharge a partial oxidation of the To be connected opening edges of the flat bag is reached, the welding takes place the edges of the opening over their full length.
Die Oxydschichten bilden eine Schweißschwachstelle.The oxide layers form a weld weak point.
In den Fig. 6 und 7 sind Vorrichtungen aufgezeigt, bei denen im Bereich der zu legenden Schweißnaht eine partielle Behandlung durch eine Koronaentladung stattfindet. Es ist auch möglich, die Schweißbacken auf ihrer gesamten Länge als Elektroden auszubilden. Dies hätte zur Folge, daß die schwache Schweißstelle nicht nur in einem partiellen Bereich vorliegt, sondern über die gesamte Nathbreite bzw. Nahtlänge.In Figs. 6 and 7 devices are shown in which in the area a partial treatment of the weld seam to be made by means of a corona discharge takes place. It is also possible to use the welding jaws along their entire length as Form electrodes. This would mean that the weak weld would not is only present in a partial area, but over the entire width of the seam or Seam length.
In Abwandlungen der Vorrichtungen nach den Fig. 6 und 7 ist es auch möglich, die Elektroden zur Erzeugung der Koronaentladung getrennt von den Schweißbacken vorzusehen, und zwar parallel zu den Schweißbacken oder in einer Hintereinanderanordnung mit den Schweißbacken und die Elektroden im gleichen Zeitzyklus und im gleichen Sinne wie die Schweißbacken zu bewegen.In modifications of the devices according to FIGS. 6 and 7 it is also possible to separate the electrodes for generating the corona discharge from the welding jaws to be provided, namely parallel to the welding jaws or in a series arrangement with the welding jaws and the electrodes in the same time cycle and in the same Senses how to move the welding jaws.
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19782821435 DE2821435A1 (en) | 1978-05-16 | 1978-05-16 | Oxidising selected zones of welded plastics packaging film or laminate - by corona discharge or gas-flaming to improve sealing and opening |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19782821435 DE2821435A1 (en) | 1978-05-16 | 1978-05-16 | Oxidising selected zones of welded plastics packaging film or laminate - by corona discharge or gas-flaming to improve sealing and opening |
Publications (1)
Publication Number | Publication Date |
---|---|
DE2821435A1 true DE2821435A1 (en) | 1979-11-22 |
Family
ID=6039512
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19782821435 Withdrawn DE2821435A1 (en) | 1978-05-16 | 1978-05-16 | Oxidising selected zones of welded plastics packaging film or laminate - by corona discharge or gas-flaming to improve sealing and opening |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE2821435A1 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0127159A2 (en) * | 1983-05-25 | 1984-12-05 | Showa Denko Kabushiki Kaisha | Method of manufacturing container covers |
EP0747202A2 (en) * | 1995-06-08 | 1996-12-11 | Roeder Industrial Holdings Limited | Treatment of profile strips for reclosable fasteners |
US5643388A (en) * | 1995-02-13 | 1997-07-01 | Westvaco Corporation | Process of making paperboard carrier for static cling vinyl products |
US6265063B1 (en) | 2000-04-27 | 2001-07-24 | Westvaco Corporation | Paperboard carrier for static cling applications |
EP1288141A2 (en) * | 2001-08-06 | 2003-03-05 | Hosokawa Yoko Co., Ltd | Packaging material and packaging bag made thereof |
FR2887487A1 (en) * | 2005-06-27 | 2006-12-29 | Solvay Ind Foils Man And Res | PROCESS FOR SOLDING PLASTIC MATERIAL |
CN105365267A (en) * | 2015-12-10 | 2016-03-02 | 重庆四平塑料包装股份有限公司 | Production line used for producing polyethylene plastic packaging bags and side sealing equipment for production line |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1236992B (en) * | 1964-05-20 | 1967-03-16 | Kloeckner Humboldt Deutz Ag | Method of making periclase from dolomite rock |
DE2643772A1 (en) * | 1976-09-29 | 1978-03-30 | Hoechst Ag | CORONA DEVICE |
-
1978
- 1978-05-16 DE DE19782821435 patent/DE2821435A1/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1236992B (en) * | 1964-05-20 | 1967-03-16 | Kloeckner Humboldt Deutz Ag | Method of making periclase from dolomite rock |
DE2643772A1 (en) * | 1976-09-29 | 1978-03-30 | Hoechst Ag | CORONA DEVICE |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0127159A2 (en) * | 1983-05-25 | 1984-12-05 | Showa Denko Kabushiki Kaisha | Method of manufacturing container covers |
EP0127159A3 (en) * | 1983-05-25 | 1986-11-26 | Showa Denko K.K. | Method of manufacturing container covers |
US5643388A (en) * | 1995-02-13 | 1997-07-01 | Westvaco Corporation | Process of making paperboard carrier for static cling vinyl products |
US6015044A (en) * | 1995-02-13 | 2000-01-18 | Westvaco Corporation | Paperboard carrier for static cling vinyl products |
EP0747202A2 (en) * | 1995-06-08 | 1996-12-11 | Roeder Industrial Holdings Limited | Treatment of profile strips for reclosable fasteners |
EP0747202A3 (en) * | 1995-06-08 | 1997-10-15 | Roeder Ind Holdings | Treatment of profile strips for reclosable fasteners |
US6265063B1 (en) | 2000-04-27 | 2001-07-24 | Westvaco Corporation | Paperboard carrier for static cling applications |
EP1288141A2 (en) * | 2001-08-06 | 2003-03-05 | Hosokawa Yoko Co., Ltd | Packaging material and packaging bag made thereof |
EP1288141A3 (en) * | 2001-08-06 | 2003-11-26 | Hosokawa Yoko Co., Ltd | Packaging material and packaging bag made thereof |
US7040483B2 (en) | 2001-08-06 | 2006-05-09 | Hosokawa Yoko Co., Ltd. | Packaging bag with weak sealed duct |
FR2887487A1 (en) * | 2005-06-27 | 2006-12-29 | Solvay Ind Foils Man And Res | PROCESS FOR SOLDING PLASTIC MATERIAL |
WO2007000273A1 (en) * | 2005-06-27 | 2007-01-04 | Renolit Ag | Method of welding plastics |
CN105365267A (en) * | 2015-12-10 | 2016-03-02 | 重庆四平塑料包装股份有限公司 | Production line used for producing polyethylene plastic packaging bags and side sealing equipment for production line |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0274514B1 (en) | Package for packing pieces of goods and process of manufacture thereof | |
CH640471A5 (en) | MULTI-WALLY BAG AND METHOD FOR THE PRODUCTION THEREOF. | |
DE7926961U1 (en) | Bag with two pockets | |
CH642923A5 (en) | METHOD FOR THE CONTINUOUS PRODUCTION OF PACKAGE CONTAINERS AND DEVICE FOR CARRYING OUT THIS. | |
DE4126557A1 (en) | Filled plastic film bag prodn. - by forming film into tube, welding overlap and end, filling with liq. and sealing, all welds being ultrasonic and finally cutting off bag | |
EP1754596B1 (en) | Method for manufacturing bags with gussets | |
DE3623568A1 (en) | Gas sterilizable packaging | |
EP0244674B1 (en) | Liquid package, method for making it and plastic web for making it | |
DE2821435A1 (en) | Oxidising selected zones of welded plastics packaging film or laminate - by corona discharge or gas-flaming to improve sealing and opening | |
DE2840223A1 (en) | PACKAGING IN THE FORM OF A FOLDING BAG | |
DE2456609A1 (en) | PACKAGING WITH A PROTECTIVE STRIP | |
DE19802662A1 (en) | Compound laminated film material for foodstuff packaging | |
EP0358916A1 (en) | Package, compound foil for producing a package, device for producing the compound foil and process for producing vacuum packages | |
DE2362351A1 (en) | Tobacco pouch made from laminated rectangular foil - has welded seams of unequal tear strength | |
EP3162730B1 (en) | Device and method for manufacturing film bags | |
DE2031036A1 (en) | Method of heat sealing fohen leaves | |
DE3020043A1 (en) | Foil bag with cross sealed bottom - has longitudinal overlap seam and self closing filler opening formed by interruption in weld seam | |
WO1991001927A1 (en) | Packaging for foodstuffs, in particular bakery products such as bread, cakes or the like | |
DE2234334A1 (en) | METHOD AND DEVICE FOR SEALING AND SEPARATING LIQUID-FILLED BAGS | |
DE3829602A1 (en) | Method and device for the production of side-fold bags (pouches) | |
DE3151701A1 (en) | Flexible packaging container made of foldable material in the form of a sack or bag | |
DE1479122A1 (en) | Method for incorporating a tear-open thread into a web provided with at least one synthetic resin surface | |
DE2507722A1 (en) | Thermoplastic packaging bag - having body with tearable weakened line, and laminated outer films covering body-weakened line | |
AT380430B (en) | METHOD AND DEVICE FOR PRODUCING MULTI-WALLY BAGS | |
DE19501370C2 (en) | Device for the production of bags with a contour |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
8110 | Request for examination paragraph 44 | ||
8130 | Withdrawal |