RU2791234C1 - Paste packaging - Google Patents

Abstract

FIELD: packaging technology.

SUBSTANCE: invention of packaging for paste, in particular fresh paste, as well as a method for packaging pastes, in particular fresh pastes. The packaging for pastes is made of a welded film and has a longitudinal weld forming a sleeve, a first transverse weld and a second transverse weld, and these two transverse welds form opposite side edges of the package, while the film, in particular as a multilayer mono-material, contains polypropylene and a protective layer of aluminum oxide or silicon oxide. The invention also concerns pastes placed in this packaging and the method for packaging pastes.

EFFECT: invention makes it possible to provide packaging for pastes, in particular fresh pastes, the material of which can be reused, provides improved shelf life and/or gives improved stability for the location of the package upstanding.

14 cl, 7 dwg

Description

FIELD OF TECHNOLOGY

The present invention relates to packaging for pastas, in particular fresh pastas. The invention also concerns pastas, in particular fresh pastas, packed in it, as well as a method for packaging pastes, in particular fresh pastas.

BACKGROUND OF THE INVENTION

Fresh pastas, also called “pasta fresca” in Italian, are becoming increasingly popular because, compared to dried pasta, which has a longer shelf life, they have an improved taste, aroma and appearance. Also, the cooking time is sometimes greatly reduced, which makes fresh pastas as if they were a finished product. Fresh pastas are pastas that do not, or at least do not, undergo a significant drying step during production and, due to their relatively high water content, must always be kept refrigerated prior to cooking. That is, fresh pastas should be understood, for example: fresh noodles, unfilled pasta such as spaghetti, tagliatelle, fettuccine, gnocchi, schupfnudel, short cut shaped noodles, as well as filled pasta such as tortiglioni and ravioli. In addition to possible different fillings based on cheese and meat, also the likely content of eggs in the dough once again increases the need for refrigeration and packaging that extends the shelf life. As mentioned above, partially fresh, in particular semi-fresh pastas or pasta also rise under the fresh pastas. Such semi or partially fresh pastes undergo only a partial drying step.

In order to achieve the longest possible shelf life of fresh pastes, special requirements are placed on the packaging, which until now have been in conflict with ideas about shelf life. From the prior art packages for fresh pastes are known, which are primarily made of polyethylene and/or (oriented) polyamide. Known for pastes, an exemplary multilayer film consists of, for example, a layer of paper (for a natural looking appearance), polyethylene, oriented polyamide, and polyethylene. Some multilayer film packages also use ethylene-vinyl acetate as a barrier.

That is, a significant disadvantage of the known pasta packages is that they cannot be recycled or, accordingly, cannot be recycled. In particular, the known packages for fresh pastes, due to their material, are also not sufficiently stable, which, for example, in packages with a standing bottom, can lead to difficulties and leads to the need for structurally reinforcing welds in the manufacture of the package, in order to somewhat soften the problem of stability.

OBJECT OF THE INVENTION

Therefore, the object of the invention is to provide an improved packaging for pastas, in particular fresh ones, which takes into account the above problems. In particular, it is an object of the present invention to provide a package for pastes, in particular fresh pastas, whose material is recyclable, provides improved shelf life and/or provides improved stability for standing up the package.

DISCLOSURE OF THE INVENTION

The present invention relates to a fresh paste package made from a sealable film and having a sleeve-forming longitudinal seal, a first transverse seal and a second transverse seal, the two transverse seals forming opposite side edges of the package, the film comprising polypropylene and a protective layer aluminum oxide or silicon oxide.

One embodiment of the package has a standing bottom, with a longitudinal seal running along the first edge of this standing bottom, with the transverse seals running perpendicular to the longitudinal seal.

In one embodiment of the packaging, the protective layer has a thickness of 5 to 30 nm, and the film has a first layer of polypropylene with a thickness of 5 to 30 microns.

In one embodiment of the packaging, a protective layer is applied to the first layer of polypropylene.

In one embodiment of the packaging, the first layer of polypropylene is biaxially oriented.

In one embodiment of the packaging, the film has a second layer of polypropylene with a thickness of 30 to 200 microns, in particular 100 or 80 microns.

In one embodiment of the packaging, the second layer of polypropylene is bonded to the first layer of polypropylene by means of an adhesive layer.

In one embodiment of the packaging, the film has an ink layer (a) between the first polypropylene layer and the second polypropylene layer, or (b) indirectly or directly on the side of the first polypropylene layer facing away from the second polypropylene layer.

In one embodiment of the packaging, the film has a layer of matte lacquer that is applied to the first layer of polypropylene.

In one embodiment of the package, the package has an oxygen permeability below 2 cm³/(m² x 24h x bar) at 23°C and 75% relative humidity, in particular below 1.5 cm³/(m² x 24h x bar).

In one embodiment of the package, the package has a water vapor permeability below 1 g/(m² x 24h) at 23° C. and 90% relative humidity, in particular below 0.5 g/(m² x 24h).

In one embodiment of the package, the package has a W-shaped fold on the standing bottom, the W-shaped fold being welded on each of two opposite side edges.

In one of the embodiments of the package, the transverse seals are made using a first pair of transverse seals and a second pair of transverse seals, each transverse seal of these two pairs of transverse seals having two or three longitudinal ribs, and moreover, in the manufacture of transverse welds seams, these longitudinal ribs, clamping the layers of the film, are respectively frontally joined to each other, so that the transverse welds have two or, respectively, three grooves. However, the transverse sealing pads of said pairs of transverse sealing pads can also have only one longitudinal rib each, and in the manufacture of transverse welds, these longitudinal ribs, clamping the film layers, respectively frontally join each other, as a result of which the transverse welds then have only one groove. By using only one longitudinal rib, which creates only one groove in each transverse weld, the welding process is carried out with less energy and for a longer duration.

The invention also relates to pastes which are packaged in a package as described herein.

In addition, the invention relates to a method for packaging pastes in a package as described here, having the steps:

continuous film feed, and during feed:

wrapping the film so that the first longitudinal edge of the film meets the second longitudinal edge of the film;

making a sleeve-forming longitudinal seal on the first and second longitudinal edges of the film, this longitudinal seal forming the first edge of the standing bottom;

bending the second edge of the standing bottom;

folding the W-fold on the standing bottom by pressing the tool between the first and second edges;

the manufacture of the first transverse weld using the first pair of transverse welding shoes, and these two transverse welding shoes of the first pair of transverse welding shoes each have two or three longitudinal ribs, and at the same time, in the manufacture of the first transverse weld, the longitudinal ribs of the first pair of transverse welding shoes, clamping layers of film, frontally joined with each other;

filling the package with pastes;

the manufacture of the second transverse weld using the second pair of transverse welding shoes, and these two transverse welding shoes of the second pair of transverse welding shoes each have two or three longitudinal ribs, and at the same time, in the manufacture of the second transverse weld, the longitudinal ribs of the second pair of transverse welding shoes, clamping layers of film, frontally joined with each other, and

separation of the package next to the second transverse seal.

BRIEF DESCRIPTION OF THE DRAWINGS

Other advantages of the present invention appear from the detailed description and drawings.

Figures 1 and 2 show in each case a perspective view of a package according to one of the embodiments of the present invention;

Fig. 3 is a perspective view of a part of the package of Figs. 1 and 2;

Figures 4 and 5 show perspective views of the package of Figures 1-3, in each case in cross section, with the package shown in Figure 4 opaque and Figure 5 transparent;

Fig. 6 shows the components of a production machine for a package according to the invention; And

7 schematically shows the structure of a packaging film according to one of the embodiments of the invention.

IMPLEMENTATION OF THE INVENTION

FIG. 1 shows one embodiment of a packaging 1 according to the invention for pastas, in particular fresh pastas. The sleeve-forming longitudinal seal 2 on the standing bottom 5 is visible here, as well as the first transverse seal 3 and the second transverse seal 4, these two transverse seals 3 and 4 forming opposite side edges of the package 1. The terms "longitudinal" and "transverse ” refers to the direction of continuous film feed in the manufacturing process, i.e. the longitudinal weld runs along the sleeve formed from the film, and the transverse welds run across it.

The film to be welded contains the polypropylene according to the invention and a protective layer of aluminum oxide or silicon oxide. As a result, the packaging can be recycled or recycled and is still suitable for fresh pastes, while meeting the requirements for service life and hygiene. The packaging according to the invention is therefore particularly environmentally friendly. The protective layer is negligible in terms of recycling.

As shown in figure 2, the package 1 has a standing bottom 5, while the longitudinal weld 2 runs along the first edge 6 of the standing bottom 5, and the transverse welds 3 and 4 run perpendicular to the longitudinal weld 2. Opposite the first edge 6 second the edge 7 is also an integral part of the standing bottom 5.

Figures 3, 4 and 5 show the W-fold 8 on the upright bottom 5 of the package 1, this W-fold being welded on each of the two opposite side edges (see circled areas B1 and B2).

Such a W-fold, as shown in the figures, can also be made on the top, i. opposite to the standing bottom, end. In circled areas B3 and B4, the W-fold is welded here as well. It should be noted that the W-fold at this upper end is not bent in the example shown. Standing-bottom flexion, as here at the top end, is optional, and is independent of one another.

In these areas of welded joints (B1-B4), in particular, "ears" are specially prepared for the welded joint, i.e. protruding parts of the W-fold in this marginal region. For example, in these areas matt varnish may not be applied, resulting in a cleaner and more reliable weld between the PP layers.

Such a package, which has at least one standing bottom, such as the standing bottom 5 shown, can be placed upright in stores and thus saves space. No special bases for the packages are needed either, because thanks to the standing bottom 5 the package can stand on its own.

How such a package is made, which has at least one standing bottom, will be described further with reference to FIG.

The method for producing the packaging according to the invention is at the same time a method for packaging fresh pastes in said packaging. First, a film 9 is fed continuously from a roll. This is a film which, according to the invention, contains polypropylene and a protective layer of aluminum oxide or silicon oxide, see a schematic overview of the layers in FIG. In particular, the protective layer 10 has a fineness of 5 to 30 nm, while the film 9 has a first polypropylene layer 11 with a thickness of 5 to 30 µm. When this protective layer 10 is preferably applied to the first layer 11 of polypropylene. The protective layer 10 is shown on the "inward" side of the first polypropylene layer 11. The preferred layer arrangement as shown is 15-11-10-14-13-12. However, in other exemplary embodiments, the protective layer 10 can also be on the "outward" side, ie outward of the package. Another option would be the sequence 15-11-14-13-10-12, i.e. the protective layer 10 is (being directed outward) on the second layer 12 of the PP. That is, the protective layer is preferably, but not necessarily, surrounded by two layers of PP.

In particular, the first polypropylene layer 11 is biaxially oriented. The film 9 has in particular a second polypropylene layer 12 with a thickness of 30 to 200 µm. The second layer 12 of polypropylene, in particular, through the layer 13 of adhesive directly or indirectly connected to the first layer 11 of polypropylene. Also, the second polypropylene layer 12 may be biaxially oriented. Between them, in particular, there can be another layer 14 of printing ink (the sequence does not have to be the same as shown in Fig.7), with which the desired appearance of the package is created. A matt varnish layer 15 may be applied to the first polypropylene layer 11 . If the ink layer 14 is located between the first and second polypropylene layers 11 and 12, then we are talking about counter printing, but if it is on the outside (when used as packaging) of the first polypropylene layer 11, then we are talking about front printing. The matt lacquer 15 lying above the front print is then a so-called haptic lacquer, which thus has not only an appearance function, but also a tactile one. Instead of matt lacquer 15, a glossy (protective) lacquer can, of course, also be present on the outer side.

The biaxially oriented polypropylene layers can be produced, for example, by blown film extrusion and stenting. One or more extruders supply the blow head with a melt of polymeric material. With the help of the blowing air, a film sleeve is formed on the blow head, which is guided by the shrinkage of the sleeve to rollers which crush the sleeve into a non-oriented film. But then the layer is oriented biaxially by stretching in the longitudinal and transverse directions. After stretching, the layer is cooled to room temperature and can then be further processed, i.e. connect with other layers. Biaxially oriented polypropylene layers have high mechanical strength, good dimensional stability when heated, attractive appearance, and excellent flatness. For improved recycling, the film may in particular be transparent, but translucent or white embodiments are also preferred.

During feeding, the film 9 is wrapped around the forming shelf 16 so that the first longitudinal edge 17 of the film 9 is brought into contact with the second longitudinal edge 18 of the film. With the help of longitudinal welding shoes 19, the first longitudinal edge 17 and the second longitudinal edge 18 are welded to form a sleeve longitudinal weld 2. After the second edge 7 of the standing bottom 5 (not shown) has been bent, on the standing bottom 5 between the first edge 6 and the second edge 7 and similarly, at the upper end, W-shaped folds 8 are folded by pressing the tool.

Simultaneously, with the help of the first pair of transverse welding shoes 21, the first transverse weld 3 is welded, and these two transverse welding shoes of the first pair 21 of transverse welding shoes each have two or three longitudinal ribs, and at the same time, in the manufacture of the first transverse weld 3, the longitudinal ribs of the first transverse welding pads of the first pair of 21 transverse welding pads, clamping the layers of the film (there are two layers in the middle, four layers at the edges due to W-shaped folds), frontally join with the longitudinal ribs of the second transverse welding pad of the first pair of 21 transverse welding pads. Thanks to the use of this welding method, in comparison with the use of flat or corrugated sealing pads, optimum printing takes place, and the film material according to the invention can be welded more reliably and faster, which is especially a challenge in terms of packing density and from the point of view view of a solid welded joint. The longitudinal ribs have, in particular, a round profile, whereby the printing is once again improved. The transverse welds acquire two or three, in particular round, grooves along the transverse welds.

As can be seen in FIG. 6, simultaneously with the first transverse seal 3, a second transverse seal 4 of the previous, already filled package is created. Just as shown, fresh pastes 23 can now be fed into the sleeve through the filling tube 24. That is, the package is being filled. After the sleeve has then continued to move for a certain predetermined distance or, accordingly, the film has continued to be fed, the transverse seal 4 of the freshly filled package is now welded.

With each process of welding the transverse sealing pads, the already filled and closed package is simultaneously separated, between the first transverse seal 3 of the next package and the second transverse seal 4 of the already filled and closed package (for better clarity, the package in Fig. 6 is shown not separated).

In particular, the packaging according to the invention, the film, has an oxygen permeability below 2 cm³/(m² x 24h x bar) at 23°C and 75% relative humidity, in particular below 1.5 cm³/(m² x 24h x bar). This package also has, in particular, a water vapor permeability below 1 g/(m² x 24h) at 23°C and 90% relative humidity, in particular below 0.5 g/(m² x 24h). It owes these properties, on the one hand, to the film according to the invention, and in particular, on the other hand, also to the preferred welding method.

Although the invention has been explained in its preferred embodiment(s), however, many other changes and variations can be made without departing from the scope of the present invention. Therefore, it is intended that the appended claims cover changes and variations that are contained within the actual scope of the invention.

Claims (27)

1. Packaging (1) for pastes (23), in particular fresh pastes, made from a sealable film (9) and having sleeve-forming longitudinal weld (2), a first transverse seal (3) and a second transverse seal (4), the two transverse seals forming opposite side edges of the package, characterized in that the film contains polypropylene (11, 12) and a protective layer (10) of aluminum oxide or silicon oxide, and the package (1) also has a standing bottom (5), while the longitudinal weld (2) runs along the first edge (6) of this standing bottom, while the transverse welds (3, 4) run perpendicular to the longitudinal weld. 2. Packaging (1) according to claim 1, wherein the protective layer (10) has a thickness of 5 to 30 nm, and the film (9) has a first layer (11) of polypropylene with a thickness of 5 to 30 µm. 3. Packaging (1) according to claim 2, wherein the protective layer (10) is applied to the first layer (11) of polypropylene. 4. Packaging (1) according to claim 2 or 3, wherein the first polypropylene layer (11) is biaxially oriented. 5. Packing (1) according to one of paragraphs. 2-4, wherein the film (9) has a second layer (12) of polypropylene with a thickness of 30 to 200 µm, in particular 100 or 80 µm. 6. Packaging (1) according to claim 5, wherein the second polypropylene layer (12) is connected to the first polypropylene layer (11) by means of an adhesive layer (13). 7. Packaging (1) according to claim 5 or 6, wherein the film (9) has an ink layer (14) between the first polypropylene layer (11) and the second polypropylene layer (12). 8. Packing (1) according to one of paragraphs. 2-7, wherein the film (9) has a matt varnish layer (15) which is applied to the first polypropylene layer (10). 9. Packaging (1) according to one of the preceding claims, wherein the packaging has an oxygen permeability below 2 cm³/(m² × 24 h × bar) at 23°C and 75% relative humidity, in particular below 1.5 cm³/( m² × 24 h × bar). 10. Packaging (1) according to one of the preceding claims, wherein the packaging has a water vapor permeability below 1 g/(m² × 24 h) at 23°C and 90% relative humidity, in particular below 0.5 g/(m² × 24 h). 11. Package (1) according to one of the previous claims, wherein the package has a W-shaped fold (8) on a standing bottom (5), this W-shaped fold being welded on each of the two opposite side edges. 12. Packaging (1) according to one of the previous paragraphs, wherein the transverse welds (3, 4) are made using the first pair (21) of the transverse welding shoes and the second pair (22) of the transverse welding shoes, while in particular each transverse welding the block of these two pairs of transverse sealing blocks has one, two or three longitudinal ribs, and at the same time, in the manufacture of transverse welds, the longitudinal ribs, clamping the layers of the film, are respectively frontally joined to each other, so that the transverse welds have one, two or, respectively, three grooves. 13. Pastes (23), in particular fresh pastas, which are packaged in one of the previous paragraphs. 14. A method of packaging pastes (23), in particular fresh pastes, in a package (1) according to one of paragraphs. 1-12, including the steps: continuous film feed (9), and at the time of submission: wrapping the film so that the first longitudinal edge of the film meets the second longitudinal edge of the film; making a sleeve-forming longitudinal seal (2) at the first and second longitudinal edges of the film, this longitudinal seal forming the first edge (6) of the standing bottom (5); bending the second edge (7) of the standing bottom; folding the W-fold on the standing bottom by pressing the tool (20) between the first and second edges; production of the first transverse weld (3) using the first pair (21) of transverse welding shoes, moreover, these two transverse welding shoes of the first pair of transverse welding shoes each have two or three longitudinal ribs, and at the same time, in the manufacture of the first transverse weld, the longitudinal ribs of the first pairs of transverse welding pads, clamping the film layers, are frontally joined to each other; filling the package with paste; production of the second transverse weld (4) by means of the second pair (22) of transverse welding shoes, wherein these two transverse welding shoes of the second pair of transverse welding shoes each have two or three longitudinal ribs, and at the same time, in the manufacture of the second transverse weld, the longitudinal ribs of the second pairs of transverse welding pads, clamping the film layers, are frontally joined to each other; And separation of the package next to the second transverse seal.

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