EP1424293A2 - Plastic packaging container - Google Patents

Abstract

A packaging container (10) made of plastic, consists of a flat hose (1) which is closed on one side and which forms a bag shaped container. The flat hose is surrounded by two flat film sections (2,6), which overlap the edge regions. The hose has a filling opening (4) and connection seams (13,18). The hose consists of e.g. an outer LDPE layer and an inner HDPE layer.

Description

The invention relates to a packaging container made of plastic, consisting of a flat tube that is closed at least on one side and one forms bag-shaped container.

Packaging container made of plastic, for example from a one or multilayer flat tubing are used for different types of Substances needed to protect them from contamination or in the case of granular substances in a certain packaging size to be able to deliver. Especially with chemical or pharmaceutical Products are made from packaging sacks that consist of one Flat tubing can be manufactured. It is common to keep these fabrics dry on the inside surface of the sack one with a desiccant, for example Fix silica gel, calcium sulfate or the like filled bag. This happens for example with the help of a perforated cover film Cover the desiccant bag on the inner surface of the tubular film is welded onto the edge. Due to an existing perforation for example bags made of porous paper, felt or the like or the desiccant with the interior of the packaging bag in conjunction to keep this dry or to a certain degree of dryness to keep.

To fix the desiccant bag on the inner surface of the bag various methods are known. In one method, the one on The end of the sealed packaging bag turned upside down and onto the now exposed one Inside is a desiccant bag and a perforated one above it Cover foil placed and welded with its edge on the inner surface. In In a second method, a packaging bag is welded at one end only used and a larger circular cutout incorporated and a previously perforated inner film and a second non-perforated one Outer film with the interposition of a drying agent from the outside on the edge of the Cutout welded. In both cases there is a connection between the desiccant bag and the interior of the packaging container. Such cover films, however, only extend over a small one Area of the packaging container without the tightness of the packaging container to increase.

For many of the fabrics to be packaged, however, it is required that the inside of the Packaging container is completely sterile and free of foreign particles. Further requirements even require that the Container so that foreign matter can neither penetrate nor escape. It is important to ensure that the packaging container intended for reception is still completely sterile and free of foreign particles. Farther has been shown that in multilayer films at the open ends of the Packaging container creates a rolling effect that leads to deformation leads inside and thus complicates filling.

The invention is therefore based on the object of a packaging container create, which resists a high internal pressure, is gas and aroma tight and which has high rigidity and is easier to fill.

The packaging container according to the invention also has the task to provide a packaging container, which according to Manufacturing remains free of foreign particles and germs.

Another object of the invention is to provide a packaging container for Make available that is not only free of foreign particles and germs can be manufactured and transported, but also reliably re-welded can be.

Another object of the invention is to provide a packaging material for To provide, which is securely wound up in the closed state can be.

According to the invention it is provided to achieve the object that the flat hose surrounded on the outside by two further flat foils and is laminated with these, which on the longitudinal and transverse edges of the inside form a flat overlap on the edge. Further advantageous embodiments of the invention result from the subclaims.

By using another flat film with overlap on the edge and different physical and chemical properties ensures that the inner flat hose, which is used for receiving of the substances to be transported is additionally sealed can be that the boundary conditions given to the packaging material, such as air and gas tight as well as aroma and UV protection etc. guaranteed are. For this it is necessary to have a packaging container available to deliver, which may be delivered closed. Through the selected cross-border welding with tab overhang is also ensures that the thickness of the flat tube in the invention Packaging container over the entire width of the flat film close to is the same height and thus this flat film is also under formation of one stable winding can be wound up. In the packaging container according to the invention is one over the entire width of the inner flat hose equally thick outer layer of film, so that can be achieved the inner flat tube from the outside through the outer film can be welded. This weld can cover the entire width with the same temperature and a comparable heat flow, so that there is no uneven welding of the inner flat hose cross-machine direction occurs.

Only through the lamination of the inner flat tube according to the invention with the outer film and the invention Film arrangement ensures that the packaging container is both high Rigidity, especially at the opening edge, gas and aroma tightness, one high resistance to high internal pressures, as in the Storage of many stacked filled packages can occur, a lack of particles and germs, even during storage, and also a safe one Has windability. The lamination ensures that the heat flow through the composite layers when welding the inner tube is high enough that the inner tube is a higher Melting temperature than the outer sheet material is high enough to to securely weld the inner tube without this Outer material flows away. To a particular extent, the invention Layer arrangement and lamination achieved that the inner flat tube if necessary, during the production by welding through the outer film material can be welded so that the inner flat tube remains largely germ and particle free and when filled in one Filling machine is slit on one side, with the slit edges due to the stiffness of the outer film layer, no rolling effect occurs, so that mechanical filling without special measures to stabilize the opening edge are necessary. The inner flat hose can also be used a generic welding machine can be welded again without that cannula formation or insufficient welding can be expected are. Come to fill the packaging bag described above mainly two methods of application. First there is the possibility direct filling of a flat hose from a supply roll in one To make packaging machines. Another option is the filling of a single pre-assembled flat bag in one To provide packaging system. In both cases this usually occurs Problem on that the composite flat tube or composite flat bag a relatively strong rolling effect on the open side inwards has, which can be an obstacle to the filling process, if not becomes impossible. The method according to the invention is more surprising Way the advantage achieved that the roll effect in a pre-assembly in of the type according to the invention does not occur and optimal filling in one Packaging machine becomes possible.

To ensure that the inner receptacle is completely off the outer flat film is surrounded, an edge-side overlap is formed. The connection of the inner flat tube with the outer flat foils can here by gluing with hot melt adhesive or welding be produced due to the action of heat, whereby to fill the inner flat hose in both the inner and the outer Flat films a filling opening is available, which can be closed later are. The temperature for closing the interior is preferred Flat hose or for lamination with the outer flat film chosen so that the temperature for lamination is lower than that for Close the flat hose. So much for special plastic materials used, which may have approximately the same melting temperature ranges can have on the side where the container is open for filling For example, a Teflon slide should remain inserted, the one Connection of the inner flat hose or a connection of the outer flat foils prevented. Similarly, when using of a hot melt adhesive.

So that the edge overlap is evenly guaranteed and one undesirable displacement of the inner flat hose cannot occur it is provided that the inner flat tube and the outer flat films are at least partially glued or welded together. Thus ensures that the inner flat hose is opposite the outer one Flat film is firmly fixed.

For the inexpensive mechanical production of the invention Packaging container is provided that the inner one-sided sealed Flat tube in the form of individual bag-shaped containers in two outer flat films on both sides are received spaced apart, with the flat films in the area between the inner bag-shaped flat tube touch. Thus there is a complete overlap of the outer flat films to ensure the inner flat tube and there is also the Possibility of packaging containers designed in this way as roll goods to manufacture, which is pre-assembled and for the use of individual packaging containers after cutting through the outer flat film can. After filling, the inner tubular film is then closed, welded, for example, and then the outer flat films in Overlap area additionally glued or welded. So none Gas diffusion can take place, the outer films can preferably be made of a laminated foil or an aluminum foil.

In a special embodiment of the invention it is provided that the inner Flat tube and the outer flat films from a multi-layer film exist, the two-layer inner flat tube with an outer layer made of LDPE (Low Density Polyethylene) and an inner layer made of HDPE (High Density Polyethylene) is manufactured and the outer flat films LDPE or a multi-layer film can be made, creating the inner Flat tube with the outer flat foils due to temperature can be welded together if the two LDPE films opposite. The melting point is chosen so that the outer Flat foils due to the effects of heat due to a higher melting temperature not be damaged or blocked.

The particular advantage of the packaging container according to the invention Plastic is the packaging bag with an additional Protective film, which can be made, for example, gas and airtight, be provided, in the form that an overlapping edge area arises, which is a complete surround of the inner flat hose allows. Another major advantage is that it is pre-assembled the packaging container can be made and this as a roll are delivered so that after cutting the outer flat film Individual packaging bags arise that have the aforementioned properties exhibit.

The invention is explained in more detail below with reference to the figures.

Figur 1

in einer Draufsicht einen Flachschlauch mit unterer Flachfolie und einem eingeschobenen Teflonschieber während des Herstellungsprozesses,

Figur 2

einen erfindungsgemäßen Verpackungsbehälter gemäß Figur 1, bestehend aus dem Flachschlauch mit beidseitigen Flachfolien, wobei die obere Flachfolie zur besseren Darstellung in einem Eckbereich umgeschlagen und leicht verschoben ist,

Figur 3

einen erfindungsgemäßen Verpackungsbehälter, bestehend aus einem Flachschlauch mit zwei außen liegenden Flachfolien, wobei der Flachschlauch beidseitig durch Wärmeeinwirkung verschlossen ist und die äußeren Flachfolien einseitig verschlossen sind,

Figur 4

einen schematischen Ablaufplan für die Herstellung der Verpackungsbehälter und

Figur 5

eine Draufsicht gemäß Figur 4 während des Herstellungsprozesses.

It shows

Figure 1

in a plan view a flat tube with a lower flat film and an inserted Teflon slide during the manufacturing process,

Figure 2

2 shows a packaging container according to the invention according to FIG. 1, consisting of the flat tube with flat films on both sides, the upper flat film being folded over and slightly shifted in a corner area for better illustration,

Figure 3

a packaging container according to the invention, consisting of a flat tube with two outer flat foils, the flat tube being closed on both sides by the action of heat and the outer flat foils being closed on one side,

Figure 4

a schematic flow chart for the manufacture of the packaging container and

Figure 5

a plan view of Figure 4 during the manufacturing process.

Figure 1 shows a plan view for better illustration Flat tube 1 with a lower flat film 2, for example, with each other can be glued or welded. The lower flat film 2 is like this dimensioned so that it projects beyond the edge area of the flat tube 1 on all sides and thus completely surrounds it. The inner flat tube 1 is in the shown embodiment closed on one side by a weld 3, while the opposite side has an opening 4 in which a Teflon slide 5 is inserted to close during manufacture to prevent the opening 4. Preferably, both as a flat tube 1 and flat film 2 multilayer films used, the two-layer inner flat tube 1 with an outer layer of LDPE and an inner layer is made of HDPE, while the outer flat film is made of LDPE or a multilayer film can be produced, the LDPA film opposite to that of the flat tube 1 comes to rest. As a result for example, the possibility of both internal and thermal effects Flat tube 1 as well as the outer flat film 2 with each other for fixation connect. The melting point is preferably chosen so that the outer flat film 2 due to the heat due to a higher Melting temperature is not damaged or blocked. Alternatively, there is Possibility that instead of a multilayer film, one with an adhesive layer is used so that the inner flat tube 1 and the outer flat films 2 fully or at least partially glued together during production are and thus the inner flat hose in its position in relation to the outer Flat film 2 is set. A hot melt adhesive can preferably be used here be used.

Figure 2 shows the arrangement of Figure 1 with an additional upper Flat film 6, which coincides with the lower flat film 2 and in the However, the illustration shown is slightly shifted to the top right and additionally a folded corner area 7 for improved presentation having.

Figure 3 shows a finished packaging container 10 with an inner flat tube 1 and outer flat films 2, 6 after filling, the inner flat tube 1 is closed on both sides by a weld 3, 8 and the outer flat films 2, 6 by welds 12, 13, 14 and 15 additionally are closed. Alternatively there is the possibility that on the welds at least in the case of the outer flat films 2, 6, and instead either an adhesive coating is used or a laminated one Flat film 2, 6 is used, the a by low heat Connection with each other and with the inner flat tube 1 without any special Allows weld seam. Of the different variants, only the one with Weld seams 12, 13, 14, 15 for the outer flat films 2, 6 and for the inner flat tube 1 with the welds 3, 11 shown.

FIGS. 4 and 5 show the side view and the top view Manufacturing process of the packaging container 10 according to the invention, wherein a prepared flat hose 1 is fed to a production line and at the same time from supply rolls 16, 17 a lower and upper flat film 2, 6 in is fed such that the flat tube 1 is spaced between the Flat films 2, 6 come to rest. By means of pressure rollers 18, 19 can for example, when using an adhesive film, the adherence of the outer Flat films 2, 6 are effected on the flat tube 1. So far, however Longitudinal welding is preferred by a weld Weld 12 by means of an upper and lower heating element 20, 21 and Production of a transverse weld seam 14 by two further heating rods 22, 23. During the welding process, the packaging container is filled later 10 in the existing opening a Teflon slide 5 or Teflon strips inserted, which can be removed after welding. This creates a packaging container 10 which is open on one side and which, according to Filling is closed by further welding processes. A first one The manufacturing variant shown below is based on a severing of the Weld seam 14, so that individual packaging containers 10 are formed be fed to a packaging machine. Alternatively, there is Possibility of cutting through the individual packaging containers 10 is dispensed with and these are wound on a roll that is in a Packaging system is still used. Inside the packaging machine there is the possibility of unwinding individual packaging containers 10 and after cutting the weld 14 to fill.

Alternatively there is the possibility to use the lower one instead of the welding device and upper flat film 2, 6 with a flat tube 1 facing To coat the adhesive film so that the two outer flat films 2, 6 stick directly on the flat top of the flat hose 1 and in Edge area lie on top of each other. Alternatively, there is the option of one Use hot melt adhesive. In case of using a laminated film with hot melt adhesive can cause a large temperature exposure Connection of the inner flat tube 1 to the outer flat films 2 be effected, the connection with a suitable temperature selection is produced without the inner flat tube 1 being closed on all sides becomes. For this purpose it is necessary that the flat tube 1 at least is welded on one side beforehand. After filling the packaging container 1 can be caused by increased temperature influence in the filling area of the Packaging container 1 closing the inner flat tube 1 and the outer flat films 2, 6 can be reached.

LIST OF REFERENCE NUMBERS

1

flat hose

2

flat film

3

Weld

4

opening

5

Teflon slider

6

flat film

7

corner

8th

Weld

10

packaging container

11

Weld

12

Weld

13

Weld

14

Weld

16

supply roll

17

supply roll

18

pinch

19

pinch

20

heater

21

heater

22

heater

23

heater

Claims (8)

Packaging container (10) made of plastic, consisting of a flat tube (1) which is closed at least on one side and forms a bag-shaped container,
characterized in that the flat tube (1) is surrounded on the outside by two further flat foils (2, 6) and is laminated with these, which form an edge-side overlap on the longitudinal and transverse edges of the inner flat tube (1). Packaging container according to claim 1,
characterized in that the inner flat tube (1) and the further flat foils (2, 6) have a corresponding filling opening (4) and can be closed after filling by at least one, preferably two separate connecting seams, for example adhesive or weld seams (13, 18) , Packaging container according to claim 1 or 2,
characterized in that the inner flat tube (1) and the outer flat films (2, 6) are at least partially glued or welded to one another. Packaging container according to one or more of claims 1, 2 or 3,
characterized in that the inner flat tube (1), which is closed on one side, is accommodated in the form of individual bag-shaped containers spaced apart in two outer flat films (2, 6) on both sides, the flat films (2, 6) touching in the area between the inner bag-shaped containers. Packaging container according to one or more of claims 1 to 4,
characterized in that several containers are pre-assembled as rolls and individual containers can be used after cutting through the outer flat film (2, 6). Packaging container according to one or more of claims 1 to 5,
characterized in that the outer flat film (2, 6) consists of a laminated film, in particular aluminum film. Packaging container according to claim 6,
characterized in that the inner flat tube (1) and the outer flat films (2, 6) consist of a multilayer film. Packaging container according to one or more of claims 1 to 7,
characterized in that the inner flat tube (1) consists of a two-layer film with an outer layer made of LDPE and an inner layer made of HDPE and the outer flat film (2, 6) consists of LDPE or a multilayer film with an inner side made of LDPE.

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