EP2735438A1 - Packaging with linear opening aid - Google Patents

Abstract

The device (7) comprises a tool (1) that makes mechanical interaction with one side (15) of a mono-film (4), for realizing a weakening line as a notch (16). The depth of the notch which ends along a cross-section of the mono-film, is less than a thickness of the mono-film, such that other side of the mono-film is intact. The tool defines an opening line which extends from an edge (6) of the mono-film to a foil segment boundary between two adjacent sheet segments. A rotatable cylinder (9) defines a reference position of the mono-film. Independent claims are included for the following: (1) a method for manufacturing a weakening line in a mono-film as an opening aid for opening a package; and (2) a mono-film.

Description

TECHNICAL FIELD

The invention relates to a production apparatus for producing an opening aid in a packaging film.

The invention further relates to a production method for producing an opening aid in the packaging film.

The invention relates to a packaging film with line-like opening aid.

The invention further relates to a packaging made from a packaging film.

BACKGROUND

A package in the form of a container closed with a foil lid with a line-like opening aid is for example from EP2374604A1 known. The foil lid has a weakening zone defining a circular opening. The weakening zone is formed by a linear laser perforation that extends through a first and a second layer group through to a carrier film. When using the laser to produce the laser perforation, the laser beam melts the material of the two groups of layers and allows it to evaporate, but the laser does not penetrate through the carrier film, but is reflected because of localized metallization on this metallization.

However, the use of a laser in a roll to be delivered or processed film has proved to be problematic. The weakening line produced along a film web at periodic intervals with the help of a laser is accompanied on both sides by a material structure (about 2-3 microns) of molten foil material, which in the case of a roll product having a few thousand layers always lies on the same cross-sectional area of the roll product comes and leads there to a so-called "piston ring".

In addition, there is always the problem with a film with metallization that the penetration depth of the laser with the depth of the metallization in the composite of the film is identical. It is thus not the depth of the line-like opening aid adapted to the particular application of the packaging film. The freedom of design with respect to the tearing behavior are thus limited by the choice of the position of the metallization in the film composite or it is completely suppressed as soon as the structure of the film is fixed.

Furthermore, there is the problem with the use of printed films that the penetration depth of the laser can be influenced by the printed images. Thus, in the worst case, the printed image can have an influence on the tear-open behavior of the film along the opening aid.

In the event that it is necessary to dispense with the above-mentioned metallization in a film, a laser for producing a line-like opening aid can not be used because the laser would penetrate the film.

It is therefore an object of the invention to improve a manufacturing apparatus, a manufacturing method, a packaging film, and a package such that the problems discussed above are avoided.

SUMMARY OF THE INVENTION

This object is achieved by a manufacturing apparatus according to claim 1, a method according to claim 10, a monofilm according to claim 13 and a package according to claim 15.

The object of the invention is therefore a production device for producing a line of weakness in a monofilm for the purpose of providing an opening aid for opening a package produced by means of the monofilm, comprising a tool for mechanical interaction with the monofilm on its first side for the realization of an incision as a line of weakness the incision at a depth along the cross-section of the monofilm ends, which depth is less than the thickness of the monofilm, so that the second side of the monofilm is intact.

In addition, the subject of the invention is a method wherein the method comprises the following method steps, namely feeding a monofilm to a production device for producing a line of weakness in the monofilm in order to realize an opening aid for Opening a package produced by means of the monofilm, wherein the manufacturing device comprises a tool, and mechanical interaction of the tool with the monofilm on its first side, wherein the tool penetrates so deep into the monofilm that an incision is created as the line of weakness and the incision at a depth along the cross-section of the monofilm, which depth is less than the thickness of the monofilm, so that the second side of the monofilm remains intact.

In addition, the subject of the invention is a monofilm whose structure, in particular its internal structure, is free of a laser light reflecting layer or layer, in particular multilayer coextruded monofilm, comprising a line of weakness for the realization of an opening aid for opening a package made using the monofilm wherein the line of weakness is realized by an incision in the first side of the monofilm and the incision terminates at a depth along the cross-section of the monofilm, which depth is less than the thickness of the monofilm, so that the second side of the monofilm is intact.

In addition, the subject of the invention is a packaging made from or closed by means of a monofilm according to the invention.

By the measures according to the invention the advantage is obtained that even with a monofilm waiving laser light effect, a trouble-free production of a weakening line in the monofilm is made possible. In contrast to the action of laser light, in which an electromagnetic wave interacts with a film and there leads to a melting or evaporation and in particular on its surface also for displacing the plastic (production of a material structure), is in the mechanical interaction with the tool a clean burr-free weakening line is produced in the surface of the monofilm, wherein along the line of weakness the film is scratched from its first side, but not completely penetrated. By this clean, namely material deposits or material displacements avoiding scratching process in particular the problem of formation of the so-called piston ring is completely avoided in a roll goods. After interaction of the tool with the first side of the monofilm, the surface of the first page appears as smooth as before their processing. In the monofilm that has just been spread, the cut surfaces touch each other as a result of the previous tool action separated parts of the monofilm flush again and in the surface of the first page, only the position of the line of weakness can be seen.

The monofilm may preferably be a BOPP film (biaxially oriented polypropylene). This monofilm is used in the packaging industry mainly on tubular bag machines (horizontal and vertical). Such a monofilm is produced in a single step using an extruder. It can also be produced in a single step as a coextruded monofilm. Thus, said monofilm is not a composite film produced by adhesive lamination. Monofoil, however, finds its application as a component of such a composite film using e.g. a BOPP monofilm with a PE film or a BOPP monofilm is adhesive-laminated with another BOPP monofilm.

Further, particularly advantageous embodiments and modifications of the invention will become apparent from the dependent claims and the following description. In this case, refinements and developments of the production device, the method, the monofilm and the packaging, according to the aspects of claims of another category or another object to be further developed. Benefits that have been discussed in relation to the claim of a category or an item shall apply analogously to those of the other category or item.

For example, the tool may have a flat or rounded region-by-region elevation or region for co-operation with the monofilm (e.g., pinch-together), that is, to create the line of weakness. The material of the tool, in particular that part which cooperates with the monofilm, may be a plastic, a ceramic or a metal, etc. According to a preferred aspect of the invention, the tool has a - in particular metallic - knife. The knife may have a height of about 0.2 to 5 mm, preferably 1 to 2 mm.

The knife may be attached to a punch that is moved toward the monofilm by means of drive means of the manufacturing apparatus and away from the monofilm so that the knife can be precisely moved with respect to its depth of immersion in the monofilm. In the present case, the production device is operated analogously to the working principle of a punching device, but with the difference that no material punched out of the monofilm (ie cut away), but only the Monofolie scribed becomes. Preferably, the knife is mounted on a magnetic metal plate (eg, a thin plate), such as welded to this metal plate, so that it is as simple as possible and yet firmly adhering to the stamp attached.

In order to be able to control or adjust the interaction of the tool with the monofilm, it is advantageous if the production device has a reference element which serves to define a reference position of the monofilm, and in which case the tool can be positioned in relation to the monofilm in that the tool can penetrate into the monofilm brought in the reference layer from the first side and can be pulled out of it. If the production device has a stamp on which the tool is fastened as part of the drive means, it is advantageous if the reference element is designed in the form of a plate. The reference element supports the packaging film in this case from its rear side. The back side in the present context is the side intended to serve as the inside of the packaging. At the same time the punch is attached with the attached knife to the front of the monofilm, and to such an extent that the tool causes an incision in the monofilm, which ends at a depth along the cross section of the monofilm, which depth is less than the thickness of the monofilm is so that the second side (back) of the monofilm is intact. In this embodiment of the manufacturing apparatus, the monofilm can be supplied in the form of a web, stopped in the reference position, processed with the tool and then moved on by one packing segment length.

It has proven to be particularly advantageous if the production device has a rotatably mounted first - in particular metallic - cylinder, and the tool is attached to the cylinder. On the cylinder, the monofilm is continuously moved past. In this embodiment of the manufacturing apparatus, the knife may be attached to a thin, bendable magnetic metal plate (sheet metal plate), eg welded there. The metal plate may be struck around the first cylinder and adheres to the first cylinder because of the magnetic attraction. In operation, the drive means cause a rotation of the first cylinder together with the tool attached thereto, eg a knife. Parallel to the tool carrying the first cylinder is another, second - in particular metal safe - cylinder located as a reference element, for example, below the first cylinder. In the present case, the manufacturing device operated according to the working principle of a rotary die, but with the difference that no material punched out of the monofilm (ie cut away), but only the Monofolie is scratched. The drive means ensure a synchronous rotation of the two cylinders, so that the monofilm can move between them like a sheet. The drive means can also be formed with movement means for moving the monofilm, that is, for example, for unwinding and winding on carrier or transport rollers and for moving further guide rollers or interact with the movement means. This ensures that there is no difference between the peripheral speed of the tool and the linear speed of the web-like monofilm. Consequently, it is ensured that when interacting with the tool shearing forces in the monofilm are avoided. This embodiment is also distinguished by the relatively high processing speed (= transport or longitudinal speed of the monofilm) of up to 150 meters / minute, preferably up to 300 meters / minute.

In addition to the continuous operation of the manufacturing device and a semi-rotary operation is possible. In this case, the monofilm is moved at a constant speed, whereas the first cylinder is rotated at a variable speed. Whenever the tool cooperates with the monofilm, the cylinder is accelerated or decelerated to the rotational speed adapted to the speed of the monofilm. Similarly, the first cylinder can also rotate at a constant speed, whereas the monofilm is accelerated or decelerated accordingly whenever an interaction of the tool with it is desired.

The tool, such as the knife may have an open line-like shape that creates a line of weakness in the monofilm, which ends at a distance from the longitudinal edges of the film web of the monofilm and / or runs between the edges intermittently. With such a shaping of the tool lines of weakness can be produced, which allow, for example, a tearing of the package in the transverse direction. However, it has proven to be particularly advantageous if the tool describes an open line which extends from one edge of the monofilm to the other edge of the monofilm, ie from one edge of the film web to the other edge of the film web. Thereby the advantage is obtained that no discontinuities in the structure of the monofilm in the transverse direction (corresponding to the direction of the knife) are produced to the film web, which sometimes tearing the film web during rapid onward transport after processing, such as when winding on transport rollers or in the final Processing to a packaging. However, these discontinuities can be mitigated by the fact that the outermost edges of the tool designed as a knife are ground obliquely or curved.

An open line-like shape may be straight or curved, e.g. curved or arched. In the case of such a curved course, such an incision may begin at one edge of the monofilm and end at the same edge. In this way, weakening lines can advantageously be produced at the edges of a package.

However, it may also be advantageous if the tool describes an open line extending from one edge of the monofilm to a foil segment boundary between two adjacent foil segments. With such a shape, lines of weakness can be produced, e.g. located at the corners of the packaging produced by means of monofilm.

According to another embodiment, the tool may describe an open line extending from a film segment boundary between a first film segment and a directly adjacent second film segment to a second film segment boundary between the second and a directly adjacent third film segment. With such shaping, weakening lines can be produced, e.g. allow tearing of the package in the longitudinal direction.

According to another embodiment, the tool may describe a closed line. With such shaping, weakening lines can be produced, e.g. allow a hole-like opening of the wall of the package. The closed line defined by the tool may have the shape of a triangle or quadrilateral or may have a higher number of corners. It can also be a round, e.g. circular or oval or elliptical shape, or a combination of straight and curved line shapes.

It has proved to be particularly advantageous if the area delimited by the closed line has regard to its shape and / or size adapted to the shape and / or size of a product which is to be packed with a packaging using the monofilm. It is particularly advantageous if the closed line is adapted to the shape of the product, but the enclosed area is larger (eg 2 to 20%) than the projection of the product onto the monofilm. Thus, the advantage is obtained that when opening the package a contour as true as possible opening in the wall of the package can be produced, which allows easy removal of the packaged product. For example, the product can be a game character. For opening, the package may be compressed adjacent the contour of the product at the edges of the figure, with the package tearing along the line of weakness substantially in line with the contour of the figure. The figure, which can sometimes have very branched ramifications (eg, by wings, limbs, horns, etc.) can then be easily removed from the packaging without obstruction by the monofilm. However, this measure can also be advantageous in the case of pill-like products, in which case the packaging can be opened simply by pressing in a weakening line corresponding to the pill shape, after which the pills can be removed piecewise through the pill-like hole in the wall. The measures described can also be used in bar-type or bar-type or circular-segment, triangular or trapezoidal foods, in particular confectionery, in order to be able to remove these products from the packaging more easily and piecemeal.

An adhesive, preferably in regions, may be applied to the monofilm described in order to close the packaging produced by means of the monofilm by compressing parts of the monofilm.

BRIEF DESCRIPTION

Fig. 1

ein Werkzeug zur Erzeugung einer Schwächungslinie,

Fig. 2

Teile einer Herstellungsvorrichtung zur Herstellung besagter Schwächungslinie,

Fig. 3

eine Monofolie mit einer Schwächungslinie,

Fig. 4

einen Querschnitt durch einen Bearbeitungsbereich der Herstellungsvorrichtung,

Fig. 5.

einen Querschnitt durch eine gemäß der Fig. 4 bearbeitete Monofolie,

Fig. 6 - 9

unterschiedliche Ausbildungsformen des Werkzeugs,

Fig. 10

ein Segment der Monofolie zur Herstellung einer Verpackung,

Fig. 11

eine Verpackung hergestellt aus der Monofolie gemäß Fig. 10,

Fig. 12

eine weitere Ausbildungsform einer Verpackung,

Fig. 13 - 14

weitere Ausführungsbeispiele des Werkzeugs.

The invention will be explained in more detail below with reference to the accompanying figures with reference to embodiments, to which the invention is not limited. The same components are provided with identical reference numerals in the various figures. They show in a schematic way:

Fig. 1

a tool for creating a weakening line,

Fig. 2

Parts of a manufacturing device for producing said weakening line,

Fig. 3

a monofilm with a weakening line,

Fig. 4

a cross section through a processing area of the manufacturing device,

Fig. 5.

a cross section through a according to the Fig. 4 processed monofilm,

Fig. 6-9

different forms of the tool,

Fig. 10

a segment of the monofilm for the production of a packaging,

Fig. 11

a packaging made from the monofilm according to Fig. 10 .

Fig. 12

another embodiment of a packaging,

Fig. 13 - 14

further embodiments of the tool.

DESCRIPTION OF THE EMBODIMENTS

Fig. 1 shows a first embodiment of a tool 1, which has a knife 2, which is applied to a magnetic and mechanically flexible (bendable) metal plate 3. The knife 2 is just as long as the width of one in the Fig. 2 shown web of a monofilm as packaging film 4 (in the present case, a BOPP film as monofilm) and thus extends from its first edge 5 to its second edge 6. The knife 2 has a height of 1 mm.

The tool 1 is used in a manufacturing device 7, hereinafter referred to as device 7 for short. The device 7 has a first rotatable cylinder 8 made of metal and a second rotatable cylinder 9. The second cylinder 9 serves as a reference member for defining a reference position of the packaging film 4. The tool 1 is fixed to the first cylinder 8 by means of the magnetic force acting between the sheet metal plate 3 and the first cylinder 8 and the sheet metal plate 3. The knife 2 extends parallel to a first axis of rotation 10 around which the first cylinder 8 rotates in the direction of a first arrow 11 during operation. In operation, the second cylinder 9 also rotates about a second axis of rotation 12 in the direction of a second arrow 13. Between the cylinders 8 and 9, the packaging film 4 is fed in the direction of a third arrow 14. The rotational speed of the two cylinders 8 and 9 and the longitudinal speed of the packaging film 4 are coordinated so that in the interaction of the knife 2 with the packaging film 4 no differential speed between the packaging film 4 and the knife. 2 is present. Drive means 29 for driving the two cylinders 8 and 9 are indicated schematically. Rolls for unwinding / winding of the packaging film 4 and possibly additional leadership were not shown for reasons of clarity. Their drive synchronously with the cylinders 8 and 9 also takes place with the aid of the drive means 29.

A snapshot of the interaction of the knife 2 with the packaging film 4 on its first side 15 is shown in FIG FIG. 4 shown. The are in the FIG. 2 illustrated two axes of rotation 10 and 12 at a distance A to each other positioned so that in the interaction of a cut 16 as a line of weakness at a depth T (of eg 15 microns) along the cross-section Q of the packaging film 4 ends, which depth T is less than the thickness D. (For example, 30 microns) of the packaging film 4 is, so that the second side 17 of the packaging film 4 is intact. It should be said at this point, however, that the penetration depth (depth T) of the blade 2, depending on the application and thickness D of the packaging film 4 in a range of 20 - 80% of the thickness of the packaging film 4 can move. The manufacturing device 7 has positioning means 30 (shown only in a highly schematized manner), which are designed to set the desired distance A between the axes of rotation 10 and 12, so that the above-mentioned geometrical conditions are achieved when the knife 2 penetrates into the packaging film 4.

After the knife 2 of the tool 3 has penetrated from the first side 15 and has been pulled out of it again during the packaging film 4 brought into the reference position and moved there continuously, the cross section through the packaging film 4 has the same effect as in FIG Fig. 5 shown structure. The separated by the incision 16 parts of the packaging film 4 touch each other again. It can also be seen clearly that on the first side 15 again a substantially flat surface is formed, in which only the incision 16 is visible (see, for example, also Fig. 2 ), because no adjacent material structures are formed, as would be the case with a laser action to produce a line of weakness. The cut surfaces formed in the packaging film 4 to the right and left sides of the sipe 16 contact each other again.

In the FIG. 3 is a packaging film 4 can be seen, in which a recess 16 is formed along its entire length. This shape of the incision 16 was achieved by a different shape of the tool 1 (not shown). Unlike the one in the FIG. 1 shown tool 1 encloses the metal plate 3, the first cylinder 8 completely. The course of the knife 2 was chosen so that the knife 2 is aligned parallel to the direction of movement of the packaging film 4, thus extending in the circumferential direction about the first cylinder 8 along the entire circumference. The length of the blade 2 was chosen so that it completely surrounds the first cylinder 8.

In the FIG. 6 is a further embodiment of a tool 1 shown, in which the knife 2 describes a closed line. In addition, the edges 5 and 6 of the web of the packaging film 4 are shown schematically, as they come to rest during operation of the manufacturing device 7. The same applies to the following FIGS. 7 to 9 ,

With the help of in the Fig. 6 shown tool 1 can be - as in the FIG. 12 shown - a circular cut 16 as a line of weakness for the realization of an opening aid in a stand-up bag 18 manufactured from the packaging film 4 produce. In the stand-up pouch 18, the packaging space is bounded all around by the packaging film 4. To the left and right side sealing zones 19 and 20 are shown. Once the delimited by the incision 16 film area was pressed, for example, in the interior of the floor bag 18, the limited by the incision 16 opening is exposed. Now can be in the stand-up pouch 18 contained pill-shaped confectionery (not shown) well-measured (eg, always only a single) through the opening through.

In the FIG. 7 a further embodiment of the tool 1 is shown, wherein the knife 2 describes a closed line in the form of a figure.

According to a further embodiment of the tool 1 shown in FIG FIG. 8 For example, the blade 2 may also have a combination of angular and curved lines defining a closed line and thus defining an opening area in the film wall in the film.

Another embodiment of the tool 1 is in the FIG. 9 shown, wherein the defined by the knife 2 open line from the second edge 6 of the packaging film 4 extends to a segment boundary 21 of adjacent film segments.

In the FIG. 10 is a for producing a flow-wrap packaging 22 (see Fig. 11 ) specific segment of the packaging film 4 is shown. The segment has a semicircular notch 16 which begins and ends at the right segment boundary 21. A suitable for its production tool 1 would, for example, similar to those in the FIG. 9 trained tool 1 look, but with the difference that the knife 2 arcuately extending from the segment boundary 21 to the segment boundary 21 defining an open line. Along the in the FIG. 10 represented segment, a center line 23 is visualized, which is parallel to the direction of movement (see FIG. 2 Third arrow 14) of the packaging film 4 in the manufacturing device 7 extends.

For the production of in the FIG. 11 The packaging shown is the lower part of the in the FIG. 10 illustrated packaging film 4 along a first fold line 24 which is parallel to the center line 23, folded backwards. Similarly, the upper part of the packaging film 4 is folded along a second fold line 25 to the rear. The folded back parts of the packaging film 4 now overlap partially at their outer edges and it is realized in the overlap zone a longitudinal sealing seam 25 which also extends parallel to the center lines 23. To the right side and the left side of the now tube-shaped packaging 22 transverse sealing seams are realized, which close the package 22 head and foot side. With the help of the cut 16, the package 22 can now be easily opened at its lower right corner by tearing this corner.

At the in the FIG. 11 illustrated packaging 22 to provide an opening aid to the upper right corner, the packaging film 4 would have a symmetrically located to the second fold line 25 and curved from the segment boundary towards the same segment boundary extending incision 16A. This is in the FIGS. 10 and 11 is visualized by an incision 16A shown with a broken line.

At the in the FIG. 11 Packaging 22 provided an opening aid in the longitudinal direction (parallel to the center line 23), the packaging film 4 would have two to the second fold line 25 symmetrically offset cuts 16 B have, which in the Figures 10 is visualized by two broken lines 16B shown incisions. When folding the packaging film 4 along the second fold line 25, the two come rectilinear cuts 16B to lie congruent, so that the package 22 by tearing away, for example, the entire upper part of the package 22 (above the cut 16B) is easy to open.

According to a further embodiment, the packaging film 4 with its integrated opening aid can also be used as a lid of a packaging (not shown), ie for lid-like closing of a packaging. Packaged products may be removed from the package after opening the packaging film, e.g. are removed by pressing the limited by the incision 16 opening portion of the packaging film 4.

In the FIGS. 13, 14 and 15 are further embodiments of the tool 1 in a cross section of the tool 1 along the - in the present case rectilinear - knife 2 shown. Here, the knife 2 shown at its respective end a curved or oblique transition or course 28 hiss the blade 2 and the metal plate 3, so that in the processed packaging film 4 at the ends of the incision 16 abrupt transitions between scratched areas (the incision 16) and not scored areas are avoided, which contributes to the stability of the packaging film 4, when the recess 16 does not extend to the edges 5 and 6 of the packaging film 4.

FIG. 15 shows a tool 1 for the realization of a line of weakness, which is interrupted in several sections (notches 16).

It is finally pointed out once again that the figures described in detail above are only exemplary embodiments which can be modified by the person skilled in many different ways without departing from the scope of the invention. For the sake of completeness, it is also pointed out that the use of indefinite articles does not exclude "a" or "one", that the characteristics in question can also be present multiple times. Also, individually disclosed features may be combined with other features and proportions of the features illustrated may vary without departing from the concept of the invention.

Claims (15)

Manufacturing device (7) for producing a weakening line in a monofilm (4) for the purpose of providing an opening aid for opening a package (22; 18) produced by means of the monofilm (4), comprising a tool (1) for mechanical interaction with the monofilm (4 ) on its first side (15) for the purpose of realizing an incision (16) as a line of weakness, the incision (16) terminating at a depth (T) along the cross-section of the monofilm (4), which depth (T) is less than the thickness ( D) of the monofilm (4), so that the second side (17) of the monofilm (4) is intact. Manufacturing device (7) according to claim 1, wherein the tool (1) comprises a knife (2). A manufacturing apparatus according to claim 1 or 2, comprising a reference member (9) for defining a reference ply of the monofilm (4), and in operation the tool (1) being positionable with respect to the monofilm (4) Tool (1) penetrate into the monofilm (4) brought in the reference position from the first side (15) forth and can be pulled out of it again. Manufacturing device (7) according to one of the preceding claims, comprising a rotatable first cylinder (8) on which the monofilm (4) is movable past and on which the tool (1) is fixed. The manufacturing method (7) according to claims 1 to 4, wherein the tool (1) describes an open line extending from one edge (5) of the monofilm (4) to the other edge (6) of the monofilm (4). Manufacturing device (7) according to claim 1 to 4, wherein the tool (1) describes an open line extending from an edge (6). the monofilm (4) extends to a film segment boundary (21) between two adjacent film segments. The manufacturing apparatus (7) of claims 1 to 4, wherein the tool (1) describes an open line extending from a film segment boundary between a first film segment and a directly adjacent second film segment to a second film segment boundary between the second and a directly adjacent third Foil segment extends. Manufacturing device (7) according to claim 1 to 4, wherein the tool (1) describes a closed line. The manufacturing method (7) according to claim 8, wherein the area bounded by the closed line is adapted in shape and / or size to the shape and / or size of a product made with a package (18; 22) by the packaging film (4) is to be packed. Method wherein the method comprises the following method steps, namely: - feeding a monofilm (4) to a production device (7) for producing a line of weakness in the monofilm (4) for the realization of an opening aid for opening a package (18; 22) produced by means of the monofilm (4), wherein the production device (7 ) has a tool (1), and - Mechanical interaction of the tool (1) with the monofilm (4) on its first side (15), wherein the tool (1) penetrates so deep into the monofilm (4) that an incision (16) is generated as the line of weakness and the notch (16) terminates at a depth (T) along the cross section of the monofilm (4), which depth (T) is less than the thickness (D) of the monofilm (4) such that the second side (17) of the monofilm (4) remains intact. Method according to Claim 10, wherein the monofilm (4) is brought to a reference position on a reference element (9) of the production device (7) and the tool (1) is moved from the first side (15) into the monofilm (4) brought into the reference position ) penetrates. Method according to one of Claims 10 to 11, wherein the tool (1) is fastened to a rotating first cylinder (8) of the production device (7) and the monofilm (4) is moved past the rotating first cylinder (8) and thereby the tool (7) penetrates into the first side (15) of the monofilm (4) and then pulled out again. Monofilm (4) whose structure is free of a laser light reflecting layer or layer, in particular multilayer coextruded monofilm, comprising a weakening line for realizing an opening aid for opening a package (18; 22) made by means of the monofilm (4) the weakening line is realized by an incision (16) in the first side (15) of the monofilm (4) and the incision (16) terminates at a depth (T) along the cross section of the monofilm (4), which depth (T) is lower as the thickness (D) of the monofilm (4), so that the second side (17) of the monofilm (4) is intact. Monofilament (4) according to claim 13, wherein the weakening line is a closed line, in particular the area bounded by the closed line is adapted in shape and / or size to the shape and / or size of a product, which product with a packaging (18; 22) manufactured using the monofilm (4) to be packed. Packaging (18; 22) made from or sealed by means of a monofilm (4) according to one of Claims 13 to 14.

Images