Container with a hinged cap

ES 2 245 677 T3

DESCRIPTION

Container with flip-top closure.

The present invention relates to a container tube according to the preamble of claim 1.

The advantages of flip-top closures, for example over screw-cap closures, are known. Flip lid closures can be operated, for example, quickly, simply and with one hand. Furthermore, the hinged lid remains fixed open on the container, so that it cannot be lost.

Flexible packages, especially tube-like packages or container tubes, with pasty content are therefore increasingly equipped today with flip-top closures.

A known container tube with flip-top closure contains, for example, a reservoir body or container tube and a polyethylene head portion containing a hole, which is positioned by welding or sealing in a end of the container tube and which is manufactured separately. The head part is generally equipped with a screw thread for the application of a flip-top closure, wherein the flip-top closure is screwed onto the head portion of the container tube. The positive bonding connection between the packaging container and the hinged lid closure allows individual configuration of the individual packaging elements with respect to the materials used.

However, the described container tube is expensive to manufacture, since at least three separate parts must be made with the container tube, the head part and the flip-top closure and must be brought together in further process steps to form a full container tube.

Document EP 496 704 B1 describes, for example, a packaging tube with a tube and a head part. The tube body is made up of a laminate composed of three layers with an intermediate layer or sheet with a barrier effect against gases and water vapor, covered on both sides with layers of polyethylene. The head part contains a projection part as well as a hole and carries a thread for receiving a threaded closure. The head part is made of a polyethylene processed by means of injection molding technology and is connected with the tube body by means of welding joint.

Document US 5,292,034 also describes a container tube with a multi-part closure system, comprising a threaded part that is welded together with the container tube. The threaded part as well as the layers placed on the outside of the container tube are made of, for example, polyethylene.

Furthermore, container tubes are known, in which the tank body is manufactured in one piece together with the hinged lid closure by means of injection molding technology. The wall of the body of the container tube is constituted, due to manufacture, in cross section of a single continuous plastic layer and therefore generally exhibits an unsatisfactory barrier effect against fluid substances such as gases and vapor. of water.

Document US 5,036,889 further describes a container tube with a reservoir body that is made up of a composite of sheets with outer layers of polyethylene and with a projecting part that is integrated into the reservoir body. A one-piece formed polyethylene flip-top closure is sealed with the projecting portion on the reservoir body.

However, the flexural strength of polyethylene flip-top closures is sometimes unsatisfactory. This has repercussions in the sense that the hinge that connects the hinged lid with the neck of the closure experiences a high tendency to breakage.

Therefore, the invention has the task of proposing a flexible container, especially a container tube, with a tear-resistant and bending-resistant flip-top closure, which is made of as few individual parts as possible and, therefore, it is simple and inexpensive to manufacture.

According to the invention, the problem is solved through the characterization part of claim 1.

By the ring-shaped wall section it is meant in this text not only a circular round-shaped configuration of the same in the top plan view The ring-shaped wall section and therefore the neck of the closure can present, in the top plan view, also, for example, a polygonal, elliptical, oval or rectangular shape. Rather, the term "ring-shaped" is to describe a wall section that totally surrounds the opening of the neck of the closure, that is to say endless, surrounding and describing a hollow body shape with limited height extension.

The overlap zone is conveniently configured through an intermeshing confluence of the neck of the closure with the body of the reservoir. In a first embodiment, the neck of the closure fits into the opening of the tank body, so that the external sheet placed inside is directed towards the contents of the container.

ES 2 245 677 T3 or its inner cover foil of the container body forms an overlapping zone with the outer wall of the neck of the closure.

In a second embodiment, the neck of the closure is overlapped on the opening of the body of the tank, so that the outer sheet placed on the outside away from the contents of the container or its outer cover sheet of the body of the tank shapes with the inner wall of the neck of the closure an overlapping area.

In a third embodiment, the body of the tank fits into a ring-shaped recess, shaped like a fork in the cross section, of the neck of the closure, in which two strips of ring-shaped arms of the neck of the closure , which form a groove, form an area of ​​overlap with the two outer sheets of the body of the tank.

In a further embodiment of the invention, the closure neck may be overlapped in the area of ​​the closure neck opening on both sides by sheets or sheet compounds of the sheet compound of the reservoir body, so that the The neck of the closure fits between two lamellae or lamella compounds of the lamella compound of the reservoir body. In this case, in the region of the opening of the reservoir body, the film composite of the reservoir body has a gap along a connecting surface between two laminations or lamella compounds on a specific surface section, which defines the overlap zone at the same time.

The flip-top closure and the container container are joined together in the overlap area in a convenient manner by means of a surface sealed or welded joint.

In the embodiment of the container as a container tube, the reservoir body is in the form of a container tube. The packaging tube may be a seamless packaging tube, a longitudinally seam packaging tube or a rolled packaging tube. Furthermore, the invention also relates to flip-top closure tube-like packages.

The manufacture of the container tubes is carried out, for example, by means of winding and flapping a composite of sheets in endless form to obtain a tube. From the tube the container tubes are separated into the desired length. Optionally, a shoulder-shaped terminal is formed at one end for connection of the container tube with a flip-top closure.

Suitable materials for the reservoir body, especially for the container tube, are for example sheet composites containing layers or sheets of thermoplastic materials based on olefin, ester, amide, styrene or vinyl compounds. Furthermore, the film composition advantageously has at least one film or layer with a barrier effect against gases and / or water vapor.

Typical examples of plastics for thermoplastic layers or sheets are polyethylenes, prolpropylenes, polyalkylene terephthalates, such as polyethylene terephthalate, polyamides, polystyrene or copolymerizates of polystyrene with nitrile acryl or of polystyrene with butadiene or terpolymerized polystyrene and rubber acrylonides or polystyrene acrylonides. polyvinyl.

The sheets or layers can be made especially from a polyethylene (PE), such as high-density polyethylene (HDPE, with a density greater than 0.944 g / cm).³), medium density polyethylene (LMDPE, density: 0.9260.940 g / cm³), low-density polyethylene (LDPE, density: 0.910-0.925 g / cm³) and linear low-density polyethylene (LLDPE, density: 0.916-0.925 g / cm³), the PE sheets being able to be stretched mono or biaxially.

The sheets or layers can also be constituted, in particular, from a polypropylene (PP), such as amorphous, crystalline, highly crystalline, isotactic, syndiotactic, atactic polypropylene, or from a mixture of them, as well as from oriented polypropylene axially or biaxially or cast, in which the PP sheets can be uni- or biaxially stretched. The sheets or layers can also be made up of homo-, co- or terpolymerized materials, as well as of polypropylene mixtures. These are, for example, ethylene / propylene multi-block copolymer (E / PB), ethylene-propylene elastomer (EPM), ethylene-propylene-diene elastomer (EPDM), ethylene / propylene / diene thermoplastic elastomer (EPTE ), rubber modified polypropylene (PP + EPM), as well as other polypropylene co or terpolymers or polyblends not mentioned.

Polypropylene polyblends may also comprise polypropylene co or terpolymer polyblends.

When "aforementioned polypropylenes" are spoken of in the following, this refers, inter alia, to the enumeration indicated above.

The reservoir body is conveniently constituted of a sheet compound and contains an internally positioned outer sheet directed to the contents of the container and an outer outer sheet that is remote from the contents of the container. The external sheets placed inside and outside preferably contain, for their part, an inner and outer covering layer, respectively, which are arranged in their outermost free position.

The inner and / or outer sheeting can be re-constituted from a composite of sheeting or from a

ES 2 245 677 T3 coextrusion film, containing a cover layer. The cover layer, for its part, is, in the case of a sheet composite, for example, a monofilament or, in the case of a coextrusion film, for example, a layer. The outer sheets can in the same way be single sheets, where the cover layers correspond in each case to the outer sheets.

The inner or outer cover layer, respectively, may be the layer arranged in the outermost free position of a multi-layer inner or outer outer sheet manufactured by means of coextrusion. These layers can for their part be combined with other layers or films, for example with an intermediate layer or film and / or with one or more external multilayer coextrusion films to form a film composite of the tank body. .

In the same way, cover sheets, which correspond to the outer sheets, can be combined as single sheets with other sheets or else composed of sheets to form the sheet compound of the aforementioned tank body.

In a preferred embodiment, the outer sheet positioned on the inside and outside of the sheet composite of the reservoir body is constituted by a coextrusion film.

The inner cover layer and / or the outer cover layer and in particular the cover layer, which is directed towards the overlap area, of the outer sheet placed inside or outside, are conveniently constituted by a sheet or layer of a polypropylene, co or terpolymerized or polyblend of the polypropylene mentioned above.

In another preferred embodiment of the invention, the outer sheets are single sheets, composed of sheets or coextrusion sheets with two, three or more layers, where the outer sheet placed inside and outside and especially the outer sheet that is directed towards the overlap zone mentioned above, they are constituted by a polypropylene, co or terpolymerized or polyblend of the polypropylene mentioned above.

The outer sheets placed inside and / or outside and especially their cover layers can also contain layers, sheets, either composed of sheets of PP molding compositions according to DIN 16774 or they can be made up of them, for example:

PP-H: Propylene homopolymers.

PP-B: Propylene block copolymers with a mass percentage up to 50% of one or more aliphatic olefins without functional groups (eg ethylene).

PP-R: Statistical copolymerizates of propylene with a mass percentage up to 50% of one or more aliphatic olefins without functional groups (eg ethylene).

PP-Q: Polymer mixtures with a percentage by mass of at least 50% of polypropylene of groups H, B or R.

The outer sheets, especially that outer sheet, which establishes a bond of the material in a part of the surface with the hinged lid closure, and especially their cover layers are constituted, in a preferred embodiment, by a polypropylene polyblend with polyethylene.

In another embodiment of the invention, the outer sheet placed inside and / or outside can contain a reinforcing sheet for reinforcing the closure of the composite of sheets of the tank body, especially a reinforcing sheet consisting of a polypropylene homopolymer. The backing sheet is preferably an intermediate layer of a multilayer sheet composite, which forms the outer sheet positioned on the inside and / or outside.

The outer sheets placed inside and / or outside can contain, for example, a monofilament, a sheet compound or a coextrusion film with a cover layer that is constituted by a polypropylene, co or terpolymerized or polyblend of the polypropylene mentioned above and may then contain a reinforcing sheet consisting of a polypropylene homopolymer. Other layers or foils are also conceivable, which are connected downstream of the reinforcing foil. In a preferred way, the outer sheets are made up of three layers and contain a reinforcing sheet of the type mentioned above, which is coated on both sides with a monofilament, a composite of sheets or a coextrusion sheet, where a sheet that follows next to the reinforcing sheet contains the cover layer. Furthermore, the outer sheets can be constituted of a two-layer composite with a monofilm, a composite of sheets or a coextrusion sheet mentioned above and a reinforcing layer mentioned above.

Preferably, the outer sheet placed outside and especially the outer sheet placed outside and inside contain a reinforcing sheet. In this case, the reinforcing foil on the outer foil placed on the outside advantageously has a layer thickness greater than the thickness of the outer foil placed on the inside.

ES 2 245 677 T3

The outer sheets have, for example, a total thickness of 20-250 µm, preferably 30200 µm. In a special embodiment, the outer foil placed on the outside is to reinforce the foil composite and has a correspondingly greater layer thickness compared to the inner foil, for example a greater layer thickness in the measure from 15-100 pm. Outer sheets placed inside and / or outside can have a TiO content₂ or they can be free of TiO₂ or they can be transparent.

The film composites of the reservoir body can contain, in addition to the outer films mentioned, one or more additional films or layers, which are arranged between the outer films, in particular an intermediate film or layer, with a barrier effect against passage or diffusion. of optional gases or vapors or of all gases and vapors, such as air, oxygen, carbon dioxide, water vapor or against active, aromatic and odorous substances. The selection of the barrier layer depends especially on the desired barrier effect.

A sheet with the mentioned barrier effect can be constituted, for example, by a metal, such as iron metal, such as iron, galvanized iron, steel or non-ferrous metal, such as chromium and especially aluminum and its alloys. The metal foil can have a thickness, for example, from 6-100 pm, preferably from 5 to 50 pm, and especially from 7 to 30 pm.

Other suitable intermediate films or intermediate layers with the mentioned barrier effect are, for example, organic barrier layers, for example plastic films, such as polyvinylidene chloride (PVDC), ethyl alcohol-vinyl polymers, ethylene alcohol copolymers. vinyl (EVOH), polyacryl nitrile, for example BAREX^®, cyclo-olefin copolymers (COC), polyacryl-polyamide copolymers, copolyesters, liquid crystalline (liquid crystal) polymers (LCP), polyethylene terephthalate (PRTP) or aromatic and amorphous polyamides as well as sheets containing acryl nitrile copolymers . The plastic films can have a thickness, for example from 6 to 100 pm, in particular from 10 to 80 pm.

Support films, such as plastic films, which contain ceramic or metallic layers applied in a vacuum thin-film process by means of PVD (Physical Vapor Deposition) techniques also contain good barrier properties against gases and water vapor. ) or CVD (chemical vapor deposition). The ceramic layers can be, for example, compounds of the formulas SiO_x, where x is a number from 0.9 to 2, as well as aluminum oxide (Al₂OR₃) or aluminum nitride, which have been separated into a thin layer, for example in the range of 5 to 500 nm (nanometers), especially 10 to 200 nm, under vacuum on a support foil.

The metallic layers of aluminum or one of the metals mentioned above can also be applied by sputtering (cathode spraying) on ​​the surface of a support sheet.

In particular, plastic films, for example of the polyolefin series, without or with insufficient barrier properties can have a ceramic or metal coating on one or both sides with the abovementioned properties.

The plastic backing sheet can be, for example, a sheet of polyamide, polyester, polyolefin, polyvinyl chloride, polycarbonate, polyethylene terephthalate (PET). The thickness of these plastic sheets can be, for example, between 6 and 100 pm, preferably between 100 and 80 pm.

The interlayers or interlayers mentioned above can also be used as barrier layers, in particular as interlayers or as interlayers with a barrier effect, in the multi-layer flip-top closure described below.

The film composites of the reservoir body can contain, in addition to the abovementioned outer films and the barrier film or intermediate layer, still other films, film composites or layers of thermoplastic materials, for example of the plastics mentioned above. principle, especially from polypropylene, polyethylene or polyalkylene terephthalate, such as polyethylene terephthalate or polyamide, polystyrene or from a copolymer of polystyrene with acryl nitrile or from polystyrene with butadiene or terpolymerized of polystyrene with synthetic rubbers and acryl nitrile or polyvinyl chloride.

The reservoir body sheet composite or the individual sheets or layers thereof can be transparent, opaque or non-transparent. Furthermore, the composite of the reservoir body sheets or the individual sheets or layers thereof can be colorless, light colored or deep colored.

The film composition of the reservoir body advantageously has a total thickness of 100-600 µm, preferably 100-450 µm, especially 120 to 300 µm.

The individual films or the film compounds of the reservoir body can be produced, for example, by means of extrusion, coextrusion and calendering. The individual films or the film compounds of the film composition of the reservoir body can be connected together by means of tie layers. The tie layers are layers preferably produced by means of topcoat adhesives or topcoat lacquers with a surface density of, for example, 1 to 10 g / m², especially 2 to 8 g / m², or extrusion or coextrusion layers, for example, of a mixture of polyolefins of LL-DPE, LDPE, MDPE, HDPE or EAA (ethylene-acrylic acid copolymer) or of a polypropylene, co or terpolymerized or polypropylene mixture .

ES 2 245 677 T3

The extrusion or coextrusion layers mentioned can have a thickness of, for example, 2 to 50 nm.

The surfaces of the sheets can be treated with an adhesive. The foils can also be subjected to corona, flame, plasma or ozone treatment to improve adhesion.

Preferred tank body sheet composites contain an intermediate sheet, which is arranged between two outer sheets, which are constituted by a plastic of or with a polypropylene mentioned above, co or terpolymerized or polyblend of the polypropylene, with barrier effect, for example of a polyethylene, polyamide, polyester, EVOH, LCP or COC terephthalate or by a metal such as aluminum or an aluminum alloy.

In another preferred embodiment, at least on one side between an external sheet placed inside and / or outside and the mentioned intermediate sheet with a barrier effect, a reinforcing sheet of a previously mentioned polypropylene, co or terpolymerized, is contained. or polypropylene polyblend with a thickness, for example, between 20 and 200 μm, preferably between 40 and 150 jum, for reinforcing the composite of the reservoir body sheets. The reinforcing film contains in particular a polypropylene homopolymer or consists of it. The reinforcing sheet can furthermore, as already mentioned, also be part of a composite of sheets of an outer sheet, especially of the outer sheet placed on the outside. The reinforcing sheet can furthermore be itself a composite of sheets or a coextrusion film.

The internally laid outer foil is connected, optionally via an adhesive layer, cover layer or glue layer, preferably directly to the foil or intermediate layer, so that the layer thickness between the layer barrier and the contents of the container is as low as possible and the barrier effect starts as close as possible to the contents of the container. The outer sheet placed on the inside is preferably thinner than the outer sheet placed on the outside. The outer sheet placed inside can be, for example, between 1 and 250 jum, preferably between 10 and 150 jum, especially between 15 and 100 jum, thinner than the outer sheet placed outside.

In a further embodiment of the invention, the outer foil placed on the outside is connected, optionally via an adhesive, coating or glue layer, directly to the intermediate foil or to the intermediate layer with barrier effect , in particular in this case the reinforcing layer (s) being a part of the outer sheet placed on the outside and / or placed on the inside.

The flip top closure is preferably a molded part manufactured in one piece by means of injection casting or press molding. The neck of the flip-top closure is conveniently configured in the shape of a tube and can be configured, for example, in the shape of a cylinder, especially in the shape of a circular cylinder, or conical, with an enveloping surface that tapers conically towards the foundry opening. The hinge connecting the closure neck to the flap is conveniently manufactured in the same injection molding process as an integral component of the flap closure.

The flip-top closure can further contain an originality closure, which is manufactured in the same process together with the flip-top closure. The originality closure is preferably connected via functional connecting bridges with the flip-top closure. The originality closure is advantageously made here essentially of a polypropylene mentioned above, co or terpolymerized or a polyblend of the polypropylene. A special embodiment of such an originality closure is described in detail in the above-mentioned exemplary embodiments.

The flip-top closure is essentially constituted by a polypropylene mentioned above, co or terpolymerized or polyblend of the polypropylene. The term "essentially" is to be interpreted essentially in the sense that the flip-top closure may contain, in addition to the mentioned plastic, additionally a foil, layer or coating with a barrier effect, as described below.

The barrier cap closure can contain or be constituted by amorphous, crystalline, highly crystalline, isotactic, syndiotactic or atactic polypropylene as well as a mixture of them or a molten polypropylene. Furthermore, the polypropylene can be a homo, co or terpolymerized or a mixture of them. Furthermore, polyblends of polypropylene can also be applied, for example a polyblend of polypropylene with polyethylene.

Possible copolymers or terpolymers or polyblends are, for example, ethylene / propylene multi-block copolymer (E / PB), ethylene-propylene elastomer (EPM), ethylene-propylene-diene elastomer (EPDM), ethylene thermoplastic elastomer / propylene / diene (EPTE), rubber modified polypropylene (PP + EPM), as well as other polypropylene co or terpolymers or polyblends not mentioned.

In addition, the hinged lid closure can also be made of PP molding compounds according to DIN 16774 or can be made of them, such as:

PP-H: Propylene homopolymers.

ES 2 245 677 T3

PP-B: Propylene block copolymers with a mass percentage up to 50% of one or more aliphatic olefins without functional groups (eg ethylene).

PP-R: Statistical copolymerizates of propylene with a mass percentage up to 50% of one or more aliphatic olefins without functional groups (eg ethylene).

PP-Q: Polymer mixtures with a percentage by mass of at least 50% of polypropylene of groups H, B or R.

The flip-top closure is preferably made of a polyblend of polypropylene, especially of a polyblend of polypropylene with polyethylene.

For the purpose of improving the cold impact resistance, the mentioned polypropylene-containing plastic may be specially enriched with atactic polypropylene. The polypropylene-containing plastics mentioned may also contain stabilizers, for example to increase thermal resistance, as well as other additives, such as mineral additives, in order to achieve or improve certain properties.

The melting behavior of the plastic of the outer foil or of the cover layer of the outer foil is preferably adapted to the melting behavior of the plastic of the hinged lid closure.

The material-related nature of the flip-top closure mentioned above also applies to at least the outer layers of the multi-layer flip-top closure described below.

For high-quality products to be packaged, the flip-top closure may contain an additional diffusion barrier in the form of a barrier layer, especially a barrier layer of the foregoing enumeration. The barrier effect of the flip-top closure can be directed against certain substances such as water vapor, gases, aromatic substances or odorous substances.

This barrier layer can be a layer or sheet arranged on the surface of the flip-top closure, which is directed at or away from the contents of the container. Examples of barrier layers for flip-top closures are plastic layers or supports in the form of plastic sheets generated through the vacuum thin-film technique. A barrier effect sheet or layer can contain, for example, a metal or plastic sheet or layer or can consist of PETP, EVOH, COC, LCP or an acryl nitrile copolymer.

The barrier layers can be applied to a partial or total surface of the flip-top closure. In a preferred embodiment, the flip-top closure, especially the neck of the closure, contains a barrier layer partially or fully disposed on the surface that is directed towards the contents of the package.

The barrier layer or sheet is preferably applied totally or partially on one or both surfaces of the barrier lid closure, for example by means of coating or coextrusion. The section of the surface of the flip-top closure, which comes into connection by bonding the material with the reservoir body, is not conveniently provided with one of the above-mentioned foils or layers with barrier effect.

In another embodiment of the invention, the flip-top closure may be a one-piece, multi-layer molding made in a combination of coextrusion and injection molding. The hinged lid closure is advantageously an at least three-layer molding, in particular a three-layer molding, with an intermediate layer having a barrier effect against gases (air, oxygen, carbon dioxide, water vapor ), aromatic substances and / or odorous substances.

The barrier layer can be one of the barrier layers mentioned above, as it can also find application in the tank body. In a preferred way, the barrier layer is a plastic foil of EVOH, PETP, polyamide, COC and especially of LCP.

At least the outer layers, especially the outer layers that make up the overlap zone, of the multi-layer hinged lid closure are constituted by a polypropylene mentioned above, co or terpolymerized or a polyblend of the polypropylene.

In a preferred embodiment, exclusively the closure neck is made of multiple layers and in such a way that it contains a barrier layer.

The packaging container according to the invention can be manufactured by welding or fusing the hinged lid closure with its closure neck in the opening of the prefabricated reservoir body under the configuration of a joining seam, the hinged lid closure being constituted at least in its outer layers and the outer sheet or cover sheet directed towards the joining seam from a polypropylene, co or terpolymer of polypropylene or polypropylene polyblend.

The neck of the closure overlaps, in one embodiment of the method, under the configuration of an overlap zone with a wall section, which surrounds the opening of the closure neck in a ring shape, over the opening of the closure.

ES 2 245 677 T3 tank body or displaces it with a snapping effect, a sealed connection or welded connection being formed in the overlap area between the closing neck and the lamella compound of the tank body.

Shaping by injection molding or press forming is conveniently carried out using multi-part molding tools, which are made up of dies and punches (pressure mandrel).

The hinged lid closure can also be cast directly into the tank body, the tank body resting with the section of the wall that configures the tank body on the die or punch of the molding tool.

If necessary, a foil or a foil compound with barrier properties of the structure described above can be applied to the punch or to the die, the cover foil of which establishes a bonding connection of the material during the injection molding process or Press molding for the manufacture of the hinged lid closure with the molded part.

In a preferred embodiment, multilayer sheets or barrier-effect sheets composites of a previously mentioned structure are prefabricated with a sheet or layer placed on the outermost layer from a previously mentioned polypropylene, co or terpolymer of the polypropylene or polypropylene polyblend and is connected to the injection molding or press molding tool by joining the material with the hinged lid closure.

In another embodiment of the invention, the hinged lid closure can be coated after its manufacture in a vacuum thin-film process, on one or both sides, on all or part of the surface, especially on the surface that is directed towards the contents of the container, with a ceramic barrier layer.

The weld joint or the seal joint in the mentioned overlap area between the hinged lid closure and the tank body can be carried out by means of radiation heat or contact heat or external heating through melting of the sealing cap. hinged lid and / or of the adjacent outer foils, in particular of the adjacent cover foil, of the foil composite of the tank body.

If necessary, during welding or during sealing in the overlap area, a clamping pressure can be applied to the sections of the surface to be joined.

The container according to the invention with the polypropylene hinged lid closure is characterized, compared to polyethylene containers, among other things, by a higher surface hardness, a higher tensile strength, a higher elastic recovery capacity, higher temperature resistance and improved long-term stress resistance ability. Therefore, the tendency for the hinge of the flip-top closure to break, for example in the form of a fatigue break, is essentially less in the packaging according to the invention. Furthermore, containers with outer foils or outer layers of the tank body foil compound, which are made of at least polypropylene and with a polypropylene flip-top closure, are more suitable for hot filling and for sterilization, especially heat or radiation sterilization of the contents of the package. The packaging container according to the invention is also suitable for high burst pressures at the longitudinal, end and head seams. In this way, the containers can be exposed to higher stresses or the wall thicknesses for the same stresses can be reduced compared to polyethylene container bodies, and therefore material costs can also be reduced.

The invention is explained in detail below by way of example and with reference to the accompanying drawings. In this case:

Figure 1 shows a schematic representation of an upper part of a container tube with a hinged lid closure from the perspective.

Figure 2 shows a schematic cross-sectional view through an upper part of a container tube with a flip-top closure.

Figure 3a shows a front view of another tube container according to the invention.

Figure 3b shows a side view of a tube container according to the invention according to figure 3a.

Figure 4a shows a schematic structure of a packaging tube laminate according to the invention.

Figure 4b shows a schematic structure of another packaging tube laminate according to the invention.

Figure 4c shows a schematic structure of another packaging tube laminate according to the invention.

Figure 1 shows an exemplary embodiment of a container tube 1 with a hinged lid closure 6 and a container tube 2. The hinged lid closure 6 is constituted by a polypropylene mixture and contains a closure neck 3 in the form of a tube, conically shaped, a pouring opening 5 and a hinged lid 4, which is connected

ES 2 245 677 T3 movably by means of a hinge 7 with the closing neck 3. The hinged lid 4 also has a pivot 8 for hermetic closing of the pouring opening 5.

Figure 2 shows the cross-sectional view of the upper section of another exemplary embodiment of a container tube 10 with a flip-top closure 12 and with a container tube 11 as the reservoir body. The hinged lid closure 12 is constituted by a polypropylene polyblend and contains a tube-shaped closure neck 14, conically shaped, a hinged lid 13 with a pivot 15 for the hermetic closure of a pouring opening 16. The hinged lid 13 is connected by means of a hinge 17 to the closing neck 14. The closing neck 14 engages, under the configuration of an overlap zone 30 with a ring-shaped wall surface of the opening of the neck of closure 18 in the opening of the container tube 19 as opening of the container body. The closing neck 14 and the container tube 11 are mutually welded together in their overlapping area 30. The container tube 11 is constituted by a composite of container tube sheets 20 according to FIG. 4a.

Figures 3a-b show another tube container 40 in an embodiment of a vertical tube which is constituted by a hinged lid closure 42 and a container tube 41 joined by welding thereto. The hinged lid closure 42 is configured in the shape of a circular cylinder and is constituted by a closing neck 46 and by a hinged lid 45, which is connected to the latter by means of a hinge 43. In the frontal alignment, that is to say essentially opposite the hinge 43, a gripping aid 47 is arranged which is provided with a roughness profile. The diameter of the flip top closure 42 essentially matches the diameter of the container tube.

Under the hinged lid 45 there is placed an originality closure 44, in the form of a strip, essentially opposite to the hinge 43, the strip of which follows with its upper edge the line of the opening 49 between the closure neck 46 and the hinged lid 45 and follows with its lower edge the edge of the container tube and, furthermore, the circular cylinder shape of the neck of the closure 46. The originality closure 44 expands approximately half of the periphery of the flip-top closure 42 and is connected to the flip-top 45 by connecting bridges 48 that lead past the opening line 49. Furthermore, the originality closure 44 is secured by means of projections projecting from the closure neck 45 and which engage in recesses in the originality closure 4, against sliding it out in the direction of the hinged lid 45 (no sample), in such a way that the hinged lid 45 is secured against opening by means of the originality lock 44, which is connected to it by means of the connecting bridges 48. By separating the originality lock 44, the connecting bridges 48 are collapsed, thereby destroying the originality lock 44 and the hinged lid 45 can be opened.

The pour opening (not shown) projects from the closure neck in the form of a neck that tapers towards the outlet opening. For the hermetic closure of the tube container, the pouring opening fits, in the closed state of the flip-top closure, into a circular cylinder-shaped configuration on an inner side of the bottom of the flip-top, the inside diameter of the flap corresponding mentioned configuration approximately the outer diameter of the neck-shaped pour opening at its end section (not shown).

Figure 4a shows the structure of the sheet composite of the container tube 20 of a container tube according to the invention (see also Figure 2). The composite of sheets of the container tube 20 contains an outer sheet 24 placed inside, which is directed towards the contents of the container, and an outer sheet 21 placed outside, which is away from the contents of the container, which are constituted by a sealable polyblend of polypropylene with polyethylene, which correspond at the same time to the cover layers. Connected to the outer sheet 24 placed inside is an intermediate sheet 23 with a barrier effect against gases (air, oxygen, carbon dioxide, water vapor), aromatic substances and odorous substances. The intermediate sheet 23 is, for example, a plastic sheet of EVOH, LCP, PETP, polyamide or COC or a metal sheet.

Between the outer sheet 21 placed on the outside and the intermediate sheet 23 there is arranged a reinforcing sheet 22 for reinforcing the composite of sheets of the container tube 20 which is constituted by a homopolymer of polypropylene.

The individual sheets are bonded together by means of tie layers 26, 27, 28 of a topcoat adhesive or topcoat lacquer to form the sheet composite of the packaging tube 20. However, the sheets can be individually bonded to each other. also by means of extrusion or coextrusion, or else the tie layer can also be an extrusion or coextrusion layer.

Figure 4b shows another embodiment of a container tube sheet composite 50 of a container tube according to the invention. The composite of sheets of the container tube 50 contains an outer sheet 53 placed on the inside, which is directed towards the contents of the container, and an outer sheet 51 placed on the outside, which is away from the contents of the container, which are constituted both from a three-layer coextrusion sheet of a polypropylene mentioned above, co or terpolymerized or polyblend of the polypropylene. The outer sheets 51, 53 each contain a cover layer 52, 54, representing a freely positioned outermost layer of the coextrusion sheet.

The thickness of the outer sheet 51 placed on the outside is between 70 and 150 µm and the outer sheet 53 placed on the inside is between 30 and 100 jum. The two outer sheets have a thickness of 0.89-0.92 g / cm³. The outer sheet 51 placed on the outside can optionally also be a monofilm which is constituted by a polypropylene mentioned above, co or terpolymerized or polyblend of the polypropylene. Between the two sheets

ES 2 245 677 T3 exterior 51, 53 an intermediate sheet 57 is arranged with a barrier effect against gases (air, oxygen, carbon dioxide, water vapor), aromatic substances and odorous substances, with a thickness of 10 to 25 jum. Intermediate sheet 57 is preferably a support sheet, coated with SiO_x, from polyethylene terephthalate (PET), where x is a number from 0.9 to 2.0. The intermediate sheet 57 is connected by means of a coating lacquer 56, 58 with a surface thickness of 1 to 10 g / m³ with the outer blades 51, 53.

FIG. 4c shows another embodiment of a container tube sheet composite 60 of a container tube according to the invention. The container tube sheet composite 60 contains an outer sheet 63 placed on the inside, which is directed towards the contents of the container, and an outer sheet 61 placed on the outside, which is away from the contents of the container, which are constituted both from a coextrusion sheet of three layers of a polypropylene mentioned above, co or terpolymerized or polyblend of the polypropylene with a thickness of 0.90-0.96 g / cm³.

The total thickness of the outer sheet 61 placed on the outside is between 55 and 250 jum, the coextrusion sheet of the outer sheet 61 placed on the outside being constituted, for its part, by two outer sheets 62, 70 with a thickness of 7 at 50 jum, one of which is the outer cover layer 62, and by an intermediate sheet 69 with a thickness of 40-150 jum.

The total thickness of the outer sheet 63 placed inside is between 35 and 200 jum, the coextrusion sheet of the outer sheet 63 placed inside being constituted, for its part, by two outer sheets 64, 72 of a thickness of 7 at 50 μιη, one of which is represented by the inner cover layer 64, and by an intermediate sheet 71 with a thickness of 20-100 μm.

The two outer sheets 61, 62 have a thickness of 0.88 to 0.92 g / cm³. Between the two outer sheets 61, 63 there is arranged an intermediate sheet 67 with a barrier effect against gases (air, oxygen, carbon dioxide, water vapor), aromatic substances and odorous substances, with a thickness of 6 to 50 µm. The intermediate sheet 67 is bonded to the outer sheets 61, 63 by means of a covering adhesive 66, 68 or through a monoextrusion or coextrusion film. The aforementioned monoextrusion or coextrusion film can have a thickness, for example, from 2 to 50 gm.