ES3010233T3 - Thermoforming sheet - Google Patents

Abstract

This is a thermoformed film package with a body (1) consisting of a tray (2) and a cover film (3), the cover film (3) closing the tray (2) and the tray being formed from a thermoformed film. According to the invention, a section of printed material (6) is arranged on the package body and secured thereto (1) by means of a securing seam (7) only along part of a peripheral edge. (Automatic translation with Google Translate, no legal value)

Description

DESCRIPTION

Deep drawing sheet

The invention relates to a deep-drawing foil packaging with a packaging body consisting of a tray and a cover foil, wherein the cover foil closes the tray and the tray is formed by a deep-drawing foil.

Documents EP 1 584 569 A1 and US2015/136637 A1 disclose known deep-drawing foil packaging.

Deep-drawing foil packaging of this type is commonly used for packaging food, medical products, or similar products. The packaged products are protected by the tray formed from deep-drawing foil and can be presented attractively to the user. The products can be removed after opening the deep-drawing foil packaging.

The tray and the cover film form a packaging body designed to ensure a reliable closure and allow the end user to easily open the tear-off package. This is typically achieved by means of a correspondingly separable sealing seam that connects the tray and the cover film together and securely closes the packaging body. To open the deep-drawing film package, a disconnected section typically remains at a corner of the cover film, outside the sealing seam, which the end user can grasp and from which the cover film can be removed from the tray by peeling back the sealing seam. Separable seams of this type are also referred to as peelable seams. Non-peelable seams, on the other hand, can no longer be opened, so that in the case of a deep-drawing film package configured in this way, the only way to remove the packaged products is by destroying the cover film.

In general-purpose deep-drawing film packaging, the deep-drawing film is significantly stiffer than the cover film, so that the tray gives the deep-drawing film packaging a certain degree of stability. The cover film rests flat or substantially flat on the tray and has only a two-dimensional structure. The material for the cover film is typically a laminated composite material with an inner film of polyethylene (PE) and at least one outer film of polyethylene terephthalate (PET). The inner film of polyethylene has very good sealing properties, so that the cover film can be sealed to the tray via the inner film by heat sealing. During heat sealing, a connection is made without an additional adhesive layer, with the material of both the tray and the cover film slightly melting, creating a material-bonding bond between the two layers.

In such a laminated composite material, a printing layer may also be provided, preferably arranged between the inner and outer film. This layer is protected by the adjacent layers both on the inside and outside, thereby ensuring a high-quality appearance over a long period of time. To ensure that the printing layer remains visible from the outside, at least the outer film is transparent. The printing layer may be printed on both the inner and outer films. If necessary, the film to be printed may be subjected to a corona treatment beforehand, thereby improving the adhesion of the printing layer. In addition to the inner and outer films, other film layers may also be present.

Deep-drawn film packaging of this type is characterized by a high-quality appearance and good functional properties. However, due to the diversity of materials, plastic recycling is only possible to a very limited extent, as it is almost impossible to separate the materials and recycle them by type. Material recycling refers to recycling within a main plastic class or, preferably, within a transparent polymer class. In this context, deep-drawn packaging, known as disposable items, is usually no longer easily recyclable after use and is usually sent to waste incineration, so its thermal utilization is at least still possible.

In contrast, in the case of a single-variety design, plastic waste can be materially recycled together. However, the printing ink from the print layer, which is often present in the cover film, also hinders or even prevents joint recycling, as transparent recycling cannot be achieved. For this reason, we always strive to ensure that most of our packaging is not mixed together and, in particular, that printing is kept to a minimum. At the same time, however, visually appealing packaging must be created specifically for advertising purposes, so printing cannot be dispensed with completely. In particular, the end consumer must be provided with information about the packaged product, as well as the ingredients and expiration dates.

In this context, the present invention is based on the objective of improving the application and design possibilities of generic deep-drawn film packaging and, in particular, improving recyclability.

The object of the invention and the solution of the objective is, therefore, a deep-drawing foil packaging according to claim 1, as well as a method for its manufacture according to independent claims 20 and 21.

Based on a deep-drawn foil packaging of the type described above, a section of printed material is arranged accordingly on the packaging body and is secured to the packaging body with a fixing seam only on part of a surrounding edge. The term "fixing seam" refers in this sense to

heat-sealed seams or adhesive seams.

The surrounding edge refers to a section of the printed material section. Since, correspondingly, only the surrounding edge is attached, there are areas between the edges that rest unsecured on the packaging body. These unsecured sections rest flat on the packaging body and do not form a functional space, for example, for accommodating any objects. Rather, the securing seam should extend over only a small proportion of the surface of the printed material section, so that the printed material section can be removed as completely and easily as possible.

The attachment seam preferably extends over less than 20%, particularly preferably less than 15%, of the surface of the unprinted material section. The invention therefore differs from labeling solutions in which labels made of high-density polyethylene (HDPE), for example, are attached to the container body by means of a full-surface adhesive surface on the back of the label.

The printed material section can preferably be completely printed on the additional material section, which then contains all essential information, for example, about the contents of the packaging, the ingredients of the packaged products, expiration date information, advertising information, or similar. Therefore, it is not absolutely necessary for the packaging body to also feature a print, so that the packaging body can be easily and widely recycled.

A comparable solution is known, for example, from EP 3594 144 A1, where, in contrast to the prior invention, an additional printed material section is provided in a film packaging which, compared to a deep-drawing film packaging, does not provide for the separation of the individual end walls from one another. Accordingly, the packaging body described therein already forms a structural unit in which the material section is preferably also firmly or non-peelably connected to the end walls, so that piercing holes are provided for removing this material section. In contrast, in the case of a deep-drawing film packaging, as already explained at the outset, a peelable connection is preferably provided between the cover film and the tray, so that the printed material section, when arranged on the cover film, is arranged on a component of the packaging body that is nevertheless removed from the tray during opening. Accordingly, the invention deliberately accepts that, if the individual holding seams and closing seams are not carefully designed, the deep-drawn foil package may inadvertently tear open, in order to significantly simplify the recycling of the package.

Since the fastening seam does not extend along the entire surrounding edge, the material section can also be easily grasped from behind, so that the material section can be easily removed from the packaging body. Preferably, the fastening seam is designed for this purpose in such a way that it can be separated relatively easily. Such a peelable fastening can be established, for example, by precisely selected parameters, where the material section is, on the one hand, firmly attached to the packaging body so that unintentional detachment is prevented as far as possible, and where, on the other hand, the material section can be peeled off without great effort by being grasped in a targeted manner from behind. This can be made possible, for example, by the type of fastening, but also by the number of fastening points. Accordingly, it is provided that the fastening seam can be formed continuously or discontinuously from several fastening points.

Alternatively, the material section can also be attached to the packaging body with a non-separable or non-peelable fastening seam, whereby the printed material section preferably has a weakening of the material, for example in the form of perforations, adjacent to the fastening seam, so that a large proportion of the material section can then also be removed.

According to a preferred embodiment, the securing seam extends over a proportion between 5 and 80%, preferably between 10 and 60%, particularly preferably between 15 and 50% of the surrounding edge. Correspondingly, the edge has an unbonded portion of between 20 and 95%, preferably between 40 and 90%, particularly preferably between 50 and 85%, wherein the printed material portion can be grasped from behind and removed via the unbonded portion of the surrounding edge.

A preferred embodiment of the invention provides that the printed material section is arranged on the cover film, with the material section covering the cover film only to an extent between 30 and 80%, preferably between 40 and 70%. Of course, it is also within the scope of the invention for the printed material section to rest on the tray or on the side walls of the tray; however, a much more attractive appearance can be achieved if it is arranged on the cover film, since the material section then rests flat and the printed information is more visible. Furthermore, deep-drawn film packaging is generally stacked on top of one another in a rack, with the cover film pointing upwards, and thus the printed material section is directly visible from the outside, and the information printed thereon can be read. If the printed material section is nevertheless arranged on the deep-drawing foil of the tray, the values indicated refer to a projected area of the tray, which usually corresponds to the area of the cover foil.

A configuration with a cover film or deep-drawing film that is not completely covered is particularly useful if, according to a further development, the cover film and/or deep-drawing film are designed to be transparent. This ensures that the deep-drawing film packaging can be seen despite the use of an additional printed material section, so that, for example, the end consumer can immediately recognize the type of packaged product and does not have to rely solely on the information in the printed material section. Although, according to a preferred configuration, both the tray and the cover film are designed to be transparent, it is generally sufficient for only the cover film or deep-drawing film to be designed to be transparent. Furthermore, the printed material section can also be designed to be transparent outside of the print.

According to an alternative embodiment, the printed material section is also arranged on the cover film and covers the latter over its entire surface, with the printed material section having a print that covers the material section only to an extent of between 30 and 80%, preferably between 40 and 70%. Such an embodiment is also particularly useful if at least the cover film and the printed material section are designed to be transparent, whereby this applies only to the unprinted sections relative to the printed material section. This means that the deep-drawn film packaging can still be seen even with a full-surface arrangement.

According to a preferred embodiment of the invention, the deep-drawing film and/or the cover film are designed to be heat-sealable on an outer side of the package, such that the securing seam can be designed as a heat-sealing seam, preferably as a separable heat-sealing seam. However, it is preferable if the deep-drawing film and the cover film are designed to be heat-sealable at least on an inner side of the package, whereby the tray and the cover film can then be joined together by a closing seam extending along a surrounding side edge of the package body, whereby the closing seam is also designed as a heat-sealing seam.

In this case, when closing the deep-drawing film package, both the fixing seam and the closing seam can be formed in a single sealing process, so that the process steps for producing the deep-drawing film package in particular are substantially reduced. However, it should be noted that, in this context, the cover film, the deep-drawing film, and also the printed material section are made at least partially of a sealable material or that at least the film layers adjacent to the heat-sealing seams are made of such a sealable material. In this context, polyolefins, such as polyethylene (PE) or polypropylene (PP), are particularly suitable. However, these sealable materials generally have only poor printability, so that the printed surface of the material section must be made of a different material or must be subjected to a so-called corona treatment, so that the printability is substantially increased. However, this corona treatment should be omitted in the area of the heat-sealed seams, as it increases printability but reduces sealability at the same time.

According to an alternative embodiment, the securing seam can also be designed as an adhesive seam, so that the printed material section is secured to the packaging body, in particular to the cover film, by including an adhesive layer. This has the advantage that non-heat-sealable materials can also be secured to the packaging body. However, it is preferable for the packaging body itself to be designed to be heat-sealable, so that the closing seam can be designed as a heat-sealable seam and the securing seam as an adhesive seam.

With regard to the configuration of the closing seam, a separable or peelable closing seam or heat-sealing seam is particularly suitable. According to a particularly preferred embodiment, the closing seam has a securing section in which the closing seam is permanently formed and the closing seam is detachably formed outside the securing section. This allows the deep-drawing film package to be easily opened via the separable section, while at the same time the securing section ensures that the cover film remains adhered to the tray even when it is open. This allows the entire package body to be materially recycled together, which is particularly useful, particularly when the package body is configured with a single material type. Accordingly, according to an advantageous embodiment, the securing seam is completely detachable and the closing seam is detachable at least in sections.

Preferably, the surrounding side edge runs at least in sections along a surrounding side edge of the container body and the

The fixing seam is configured, at least in sections, congruent with the closing seam. As explained above, this has the particular advantage that the closing seam and the fixing seam can be formed together as a heat-sealing seam. However, even if the fixing seam is designed as an adhesive seam, this ensures that the fixing seam is provided at a point where the deep-drawing film packaging is configured to be particularly stable.

According to a particularly preferred embodiment, the container body has a rectangular shape, the surrounding side edge being formed by two opposite first edge sections and two opposite second edge sections, the fixing seam being arranged only on the first edge sections.

In the case of the first edge sections, these can be, for example, long sides or short sides of the container body, where the container body can also have a square shape so that all edge sections have the same length, where the fixing seam is always formed by two opposite sections.

The present invention can be used particularly advantageously if the deep-drawing film and the cover film are made of a single material. As mentioned above, a single-material configuration is used when the deep-drawing film and the cover film are made of the same material or materials that can be disposed of together. Material recyclability can be further improved if the packaging body is substantially unprinted. Within the scope of the invention, unprinted means that the packaging body is unprinted on at least more than 90%, preferably more than 95%, and particularly preferably more than 99% of its surface.

Minimal printing can be found, for example, in the form of production positioning marks, batch numbers, or expiration dates. However, the printed surface areas are so small that joint material recycling is possible despite the printing.

To enable the packaging body to also contain certain information without printing, the tray may have an embossing, in particular an information embossing. Such an information embossing may contain, for example, the brand name of the packaged product or other information that should remain available even after the printed material section is removed. The embossing can be formed, for example, using embossing tools or also by a vacuum process in which the still-molten or at least soft material of the deep-drawing film is shaped with embossings by introducing local vacuum zones during the tray formation process.

According to a preferred embodiment of the invention, the printed material section preferably consists of a material selected from the group consisting of film, nonwoven fabric, coated paper, and multilayer laminate. Particularly preferred is an embodiment in which the material of the tray, the cover film, and the unprinted material section are identical, and thus the entire film packaging is materially made of a single material. Material recycling is thus affected only by the printing of the printed material section. Such an embodiment has the advantage that the use of non-separable fastening seams is also possible, with such an embodiment providing the area at the fastening seams is correspondingly unprinted. In such an embodiment, the material section can be removed along the fastening seams, whereby weakenings in the material, for example in the form of perforation lines, are preferably delimited directly by the fastening seams. Consequently, the sections of the non-printed material section remain in the packaging body, which can be materially recycled together with it due to their non-printed design.

With regard to the use of individual films, a configuration in which the deep-drawing film has a thickness between 50 and 500 µm, in particular between 100 and 350 µm, has proven particularly advantageous. The cover film and/or the printed material section preferably have a thickness between 20 and 150 µm, in particular between 60 and 100 µm, and may be identically configured, but also differ in both thickness and specific configuration.

According to the invention, the cover film and/or the printed material section and/or the deep drawing film are configured with multiple layers and have at least one, but preferably two, outer layers of a polyolefin, in particular polyethylene or polypropylene.

These layers are particularly well-suited for sealing, so both the fixing seam and the closing seam can be designed as heat-sealed seams. The outer layers can also be designed to be peelable.

Multilayer films are preferably designed as coextruded films. In particular, multilayer films are formed by blow molding, flat sheet extrusion, or cast extrusion. In the case of the printed material section, this can be, for example, a multilayer, non-stretched cast film, e.g., three-layer, with all layers preferably being made of polypropylene. In particular, homopolymers and copolymers such as polypropylene are used, with the polypropylene used in the outer layers preferably having a lower melting point than that in the inner layers.

Alternatively, instead of coextrusion, the individual layers can also be welded, laminated, or coated together, particularly with adhesive coating. For adhesive coating, a two-component polyurethane-based adhesive is used in particular.

Furthermore, the cover film and/or the printed material section and/or the deep-drawing film may have a barrier layer. This barrier layer is preferably arranged between an outer layer and an inner layer. The barrier layer can be provided, for example, directly as a coextrusion layer, e.g., of ethylene-vinyl alcohol copolymer (EVOH), where it preferably has a thickness of between 0.5 and 20 µm, preferably between 1 and 10 µm.

Alternatively, the barrier layer can also be applied as a coating to at least one of the outer layers. Silicon dioxide (SiOx) or aluminum dioxide (AlOx) are suitable materials for this purpose, with the coating preferably having a thickness of less than 120 nm, preferably less than 100 nm, particularly preferably less than 80 nm. Furthermore, a polyvinyl alcohol (PVOH) coating is possible, which is applied to at least one of the outer layers using a solvent. The polyvinyl alcohol coating preferably has a basis weight of 0.2 to 2.8 g/m2. Particularly preferably, its weight is less than 1.5 g/m2, in particular less than 1 g/m2. A metallic layer can also be used as the barrier layer. In this case, at least one of the outer layers is metallized, with the barrier layer preferably having a thickness of less than 220 nm, preferably less than 200 nm, preferably less than 180 nm. However, such a metallic layer has the disadvantage that it can impair the visual appearance, as the barrier layer is preferably designed to be transparent. However, this is not possible with a metallized barrier layer.

In principle, barrier layers can be made very thin so that they only constitute a small proportion of the impurities in the corresponding film composite material.

In particular, in a configuration with polypropylene in the outer layers, a barrier layer of ethylene-vinyl alcohol copolymer with an ethylene content of less than 35% by weight, preferably less than 30% by weight, and particularly preferably less than 27% by weight is also used. The polypropylene content can be more than 90% by weight, preferably more than 95% by weight, based on the entire deep-drawn film packaging.

The printed material section is preferably coated with a sealing lacquer. This can be applied over the entire surface of the material section. Alternatively, only partial coating, for example in strips, is sufficient, with coating then being applied at the points where sealing is required.

If the printed material section is attached to the packaging body by means of an adhesive seam, an adhesive layer is additionally provided between the cover film or the deep-drawing film and the printed material section, the adhesive layer preferably consisting of a polyurethane (PU)-based adhesive, in particular a two-component polyurethane.

The invention is explained in more detail below with the help of an illustrative example. They show:

Figure 1: A deep-drawn container according to the invention with a section of printed material in the form of a strip

Figure 2 a cross-section of the container according to Figure 1

Figure 3 an alternative configuration of the deep-drawn foil packaging with a section of printed material resting across the entire surface

Figure 4 a cross-section of the container according to Figure 3

Figure 5 the deep-drawing foil container according to Figure 1 with a view of the bottom side Figure 6 a method for producing the deep-drawing foil container according to Figure 1

Figure 7 a process for manufacturing a deep-drawing foil container according to Figure 3

Figure 1 shows a deep-drawing foil packaging according to the invention with a packaging body 1 consisting of a tray 2 and a cover foil 3 closing the tray 2. The tray 2 has previously been brought into a three-dimensional structure from a deep-drawing foil, by means of which the reception of a product 4 is made possible.

The tray 2 and the cover film 3 are connected to each other by a closing seam 5, where the closing seam 5 is designed as a heat-sealing seam and ensures a gas- and fluid-tight closure of the packaging body 1.

In the example shown, both the tray 2 and the cover film 3 and thus the entire packaging body 1 are free of any printing, but it is fundamentally within the scope of the invention that minor printing, such as batch numbers, expiration dates, or position markings, be printed on the packaging body 1. In principle, however, all information-essential printing is arranged on a further printed material section 6, which rests flat on the cover film 3 and is connected to it via a fastening seam 7. It is shown here that the fastening seam 7 extends only along a portion of the surrounding edge of the printed material section 6 and is divided into two fastening seam sections 7a, 7b, these fastening seam sections 7a, 7b extending in sections along a surrounding lateral edge of the packaging body 1 and are at least partially congruent with the closing seam 5.

The packaging body 1 has a rectangular shape, the surrounding side edge being formed by two opposite first edge sections 8 and two opposite second edge sections 9. The fixing seam sections 7a, 7b are arranged only on the first edge sections 8, the first edge sections 8 forming the short side and the second edge sections 9 the long side of the deep-drawing film packaging or the packaging body 1. With respect to the length of the first edge sections 8, the fixing seam sections 7a, 7b each extend by 30 to 60%, so that a relatively large area of the cover film 3 is not covered by the printed material section 6 and is therefore visible from the outside. Such a configuration is particularly convenient, since the cover sheet 3 is configured so as to be transparent and consequently the product 4 is visible through the cover sheet 3. By this, the end consumer can recognize which product 4 it is even without looking at the print of the printed material section 6.

The exact structure of the deep-drawn container can be deduced from Figure 2, which shows a cross-section of the deep-drawn container according to Figure 1. It can be seen here that the closing seam 5 and the securing seam 7 lie congruently above one another and are both designed as heat-sealing seams. This allows both the closing seam 5 and the securing seam 7 to be formed in a single sealing step, thereby reducing the number of individual process steps.

The exact structure of the deep-drawn packaging can be deduced from Table 1. According to this, both the printed material section 6 and the cover film 3 are made of the same material, consisting of a biaxially oriented polypropylene (BOPP) layer and a sealing layer, which are laminated together using a two-component polyurethane adhesive (2K-PUR). The sealing layer is a coextrusion layer (PP-EVOH), in which a comparatively thin layer of ethylene-vinyl alcohol copolymer (EVOH) is arranged between two polypropylene (PP) layers. The ethylene-vinyl alcohol copolymer (EVOH) layer forms a gas barrier layer that at least hinders the penetration of oxygen, so that the shelf life of foods can be extended, for example. To improve the adhesive effect, an adhesion-promoting layer (EV) is arranged between the individual layers of the coextrusion film.

The deep-drawing film of tray 2 is designed as a coextrusion film (PP-EVOH), produced in particular by extrusion blow molding. In extrusion blow molding, a tubular preform is formed, this preform being comprised of a layer of ethylene-vinyl alcohol copolymer (EVOH) and two layers of polypropylene (PP), the polypropylene layers enclosing the ethylene-vinyl alcohol copolymer layer. The tubular preform is then laid flat, where the overlapping polypropylene layers are then blocked together, resulting in a double layer thickness, and the barrier layer can be divided into two layers in a distributed manner. This allows the thickness tolerances of the individual layers to be improved. In this context, the layer structure of the deep-drawing film shown in Table 1 refers to the preform. In contrast, the stated thickness of deep-drawing sheet corresponds to the actual sheet thickness or the thickness of the flattened preform with a double-layer structure. Alternatively, deep-drawing sheet can also be produced by cast sheet extrusion.

The sealing seam 6 is formed on a layer of biaxially oriented polypropylene (BOPP) and on a coextrusion layer (PP-EVOH). The sealing seam 5 is thus formed from two layers of polypropylene (PP). The sealing layers can be composed in a known manner, thereby reducing the resistance of the sealing seam and allowing easy separation.

Table 1

A comparison view with Figure 5 shows that the tray 2 has an information embossing 10 on its underside, through which information can be incorporated into the packaging body 1 without additional printing. This can be, for example, the brand name or a logo. Additionally or alternatively, the embossing can also be a symbol of the primary plastic type of the material or materials used from which the deep-drawn film packaging is formed.

3 and 4 show an alternative embodiment, in which the printed material section 6 now extends over the entire surface of the cover film 3 and is secured to the cover film 3 along the first edge sections 8 by means of a fixing seam 7. In contrast to FIG. 1 , the first edge sections 8 now relate to a long side of the packaging body 1. Furthermore, the individual fixing seam sections 7A, 7B are not designed as a heat-sealing seam, but as an adhesive seam, such that a layer of adhesive is correspondingly arranged between the cover film 3 and the printed material section 6. The material section 6 furthermore has a print, which, however, does not extend over the entire surface of the printed material section 6, such that if the cover film 3 and the printed material section 6 are designed to be transparent, it is still possible to see the inside of the packaging body 1 and thus the packaged product 4.

The exact structure results in particular from Figure 4 as well as from Table 2, where the structure differs from the configuration according to Figure 2 only in the printed material section 6. Since the material section 6 is connected to the cover film 3 by means of a fixing seam 7 designed as an adhesive seam, the material section 6 can be formed exclusively from a biaxially oriented polypropylene (BOPP) film without an additional sealing layer.

Table 2

Regardless of the specific configuration, the securing seam 7 extends only along a section of the surrounding edge of the printed material section 6, where the securing seam 7 is designed so that the printed material section 6 can be removed relatively easily by grasping it from behind, so that it can be recycled independently of the packaging body 1. Accordingly, the securing seams 7 are configured to be separable. Alternatively, they can also be configured to be non-separable, whereby at least one perforation must be provided so that the printed material section 6 can be removed outside the securing seams 7. In such a case, however, at least the areas of the printed material section 6 along which the securing seam sections 7a and 7b extend must be unprinted so that they can be materially recycled together with the tray 2 and the cover sheet 3 in a single-material configuration.

In the examples shown, the closing seam 5 is also designed to be separable, with at least one section of this closing seam 5 being designed as a securing section and cannot be separated in this region. This ensures that the cover film 3 remains in the tray 2 even after the packaging body 1 has been opened and can therefore be disposed of and recycled together.

Figure 6 shows an illustrative method for producing a deep-drawing film container according to Figure 1, wherein several container bodies 1 run in the machine direction MD, wherein in a first step only the trays 2 are fed with a deep-drawing film and in a second step they are covered with the cover film 3 and the printed material section 6. Both the cover film 3 and the printed material section 6 are supplied in the form of continuous strips and in each case are extracted from rolls 11.

In a sealing step, both the cover sheet 3 and the tray 2 and the printed material section 6 are sealed with the cover sheet 3 in a sealing station 12, where both the closing seam 5 and the fixing seam 7 are formed with the fixing seam sections 7a, 7b. Due to the joint sealing, the fixing seam sections 7a, 7b run congruent with the closing seam 5 in the region of the first edge sections 8, which in such a process run in a transverse direction CD. Correspondingly, the second edge sections 9 run in the machine direction MD.

In a final step, the packaging bodies 1 are separated from one another by cutting the cover sheet 3 and the printed material section 6, whereby the corners of the deep-drawing film packaging can also be trimmed at the same time. During this trimming process, between 10 and 20 mm can be removed from the edge sections 8, 9 in order to compensate for any misalignment between the cover sheet 3 and the tray 2. To avoid excessive material loss, trimming is preferably carried out only on the second edge sections 9. Furthermore, the corners between the first and second edge sections 8, 9 can also be rounded.

Figure 7 shows an alternative method for producing a deep-drawing foil container according to Figure 3. In this case too, the trays 2 are fed in the machine direction MD and then covered with a composite material consisting of a cover sheet 3 and the printed material section 6. The cover sheet 3 has already been pre-bonded to the printed material section 6 by means of an adhesive layer 13, so that the composite material consisting of the cover sheet 3 and the material section 6 can be fed from a roll 11 in the form of a common endless belt.

The adhesive layer 13 has only been applied to the first edge sections 8, whereby the first edge sections 8 now extend in the form of two strips in the machine direction MD, and the cover sheet is further dimensioned so that it covers the entire surface of the cover sheet 3. Next, a fixing seam 7 is formed between the cover sheet 3 and the printed material section 6 through the adhesive layer 13, whereby the fixing seam sections 7a, 7b extend in the machine direction MD.

In a sealing station 12, the cover sheet 3 is then sealed with the tray 2 so that a closing seam 5 is formed along the surrounding side edge.

Finally, in this case, the individual deep-drawn foil containers are separated and the surrounding side edges are trimmed.

Claims (22)

1. Deep-drawing foil packaging with a packaging body (1) consisting of a tray (2) and a cover foil (3), the cover foil (3) closing the tray (2) and the tray (2) being formed by a deep-drawing foil, a section of printed material (6) being arranged on the packaging body (1) and being fixed to the packaging body (1) with a fixing seam (7) only on a part of a surrounding edge and characterized by the cover film (3) and/or the printed material section (6) and/or the deep drawing film are configured with multiple layers and have at least one outer layer of polyolefin, and wherein the printed material section (6) is arranged on the cover film and the fixing seam (7) is configured as a heat-sealing seam or as an adhesive seam. 2. Deep drawing foil packaging according to claim 1, characterized in that the fixing seam (7) extends over a proportion between 5 and 80%, preferably between 10 and 60%, of the surrounding edge. 3. Deep-drawing foil packaging according to claim 1 or 2, characterized in that the printed material section (6) is arranged on the cover foil (3), wherein the material section (6) covers the cover foil (3) only in an amount between 30 and 80%, preferably between 40 and 70%. 4. Deep-drawing foil packaging according to claim 1 or 2, characterized in that the printed material section (6) is arranged on the cover film (3) and covers the entire surface of the cover film (3), wherein the printed material section (6) has a print that covers the material section only in an amount between 30 and 80%, preferably between 40 and 70%. 5. Deep-drawing foil packaging according to one of claims 1 to 4, characterized in that the cover foil and/or the deep-drawing foil are transparent. 6. Deep-drawing foil packaging according to one of claims 1 to 5, characterized in that the tray (2) and the cover film (3) are connected to one another by a closing seam (5) which runs along a surrounding side edge of the packaging body (1), the closing seam (5) being designed as a heat-sealing seam. 7. Deep-drawing foil packaging according to claim 6, characterized in that the fixing seam (7) is designed to be completely separable and the closing seam (5) is designed to be separable at least in sections. 8. Deep drawing foil packaging according to claim 6 or 7, characterized in that the closing seam (5) has a securing section in which the closing seam (5) is permanently configured and where the closing seam (5) is detachably configured outside the securing section. 9. Deep-drawing foil packaging according to one of claims 6 to 8, characterized in that the surrounding edge runs at least in sections along a surrounding lateral edge of the packaging body (1) and the fixing seam (7) is at least in sections congruent with the closing seam (5). 10. Deep-drawing foil packaging according to claim 9, characterized in that the packaging body (1) has a rectangular shape and the surrounding edge is formed by two opposite first edge sections and two opposite second edge sections (8, 9), wherein the fixing seam (7) is arranged only on the first edge sections (8). 11. Deep-drawing foil packaging according to one of claims 1 to 10, characterized in that the deep-drawing foil and the cover foil (3) are made of a single type of material. 12. Deep-drawing foil packaging according to one of claims 1 to 11, characterized in that the packaging body (1) is essentially not printed. 13. Deep-drawing foil packaging according to one of claims 1 to 12, characterized in that the tray (2) has a stamping, in particular an information stamping (10). 14. Deep-drawing film packaging according to one of claims 1 to 13, characterized in that the printed material section (6), the deep-drawing film and the cover film (3) are made of a single type of material, the printed material section (6) not being printed at least in the area of the fixing seam (7). 15. Deep-drawing foil packaging according to one of claims 1 to 14, characterized in that the deep-drawing foil has a thickness between 50 and 500 | jm, in particular between 100 and 350 | jm. 16. Deep-drawing foil packaging according to one of claims 1 to 15, characterized in that the cover foil (3) and/or the printed material section (6) has a thickness between 20 and 150 jim, in particular between 60 and 100 jim. 17. Deep drawing foil packaging according to one of claims 1 to 16, characterized in that the printed material section (6) comprises a material selected from the group consisting of foil, non-woven textile material and coated paper. 18. Deep-drawing film packaging according to one of claims 1 to 17, characterized in that the cover film (3) and/or the printed material section (6) and/or the deep-drawing film have at least one outer layer of polyethylene or polypropylene. 19. Deep-drawing film packaging according to one of claims 1 to 18, characterized in that the cover film (3) and/or the printed material section (6) and/or the deep-drawing film have at least one barrier layer. 20. Method for producing a deep-drawing film container according to one of claims 1 to 19, - where trays (2) of a deep drawing sheet are fed, - wherein the trays (2) are covered with a cover sheet (3) and a section of printed material (6), - wherein in a sealing step both the cover sheet (3) and the tray (2) are heat-sealed together by means of a closing seam (5) and the section of printed material (6) are heat-sealed together by means of a fixing seam (7), - where the cover sheet (3) and the section of printed material (6) are cut between two successive trays in the transverse direction (CD). 21. Method for producing a deep-drawing film container according to one of claims 1 to 19, - where trays (2) of a deep drawing sheet are fed, - wherein a composite material of a cover sheet (3) and a section of printed material (6) fixed to the cover sheet (3) by means of a fixing seam (7) is fed, - where the trays (2) are covered with the composite material, - wherein in a sealing step the composite material is heat sealed with the tray (2) by means of a closing seam (5), - where the cover sheet (3) and the section of printed material (6) are cut between two successive trays in the transverse direction (CD). 22. Method according to claim 21, wherein the fixing seam (7) is formed by an adhesive layer (13).