Protective packaging

Abstract

The invention relates to a protective packaging made of paper for an article, wherein the protective packaging comprises: a. a front wall (2) having an upper edge (8), a lower edge (20) and two mutually opposing side edges (10); and, b. a rear wall (4) having an upper edge (22), a lower edge (20) and two mutually opposing side edges (10), wherein the front wall (2) and the rear wall (4) are connected to one another along their lower edges (20), such that an interior space for receiving the article is present between the front wall (2) and the rear wall (4), characterised in that the upper edge (22) of the rear wall (4) is formed by a tab (6) which projects beyond the upper edge (8) of the front wall (2), and the front wall (2) comprises, at least in the region of its upper edge (8), at least one inner layer (14) and at least one outer layer (16) and is arranged in such a way that the tab (6) can be introduced between an inner layer (14) and an outer layer (16) of the front wall (2).

Description

[0001] Protective packaging

[0002] The invention relates to a protective packaging made of paper for an object, wherein the protective packaging has a front wall with an upper edge, a lower edge and two opposite side edges and a rear wall with an upper edge, a lower edge and two opposite side edges, wherein the front wall and the rear wall are connected to one another along their lower edges, so that an interior space for receiving the object is present between the front wall and the rear wall.

[0003] Protective packaging, particularly for bulky objects such as bumpers or motor vehicle body components, has for some time now been made from kraft paper, using a technology familiar from paper bag production. For example, a multi-layered paper is simply folded once lengthwise to form the front and rear walls. The folds form the lower edges of the front and rear walls, along which the two walls are connected. DE 10 2005 027 202 B4 discloses protective packaging in which the protective packaging is formed by skillfully folding kraft paper, with the front wall forming an open slit through which the interior is accessible. A disadvantage is that this slit is so limited that not all objects that fit into the interior can be inserted through the slit.In addition, the slot is susceptible to mechanical stress and damage, meaning the protective packaging is damaged after just a few uses and must be disposed of.

[0004] One version of the described protective packaging is provided with an adhesive strip so that the slit can be closed after the item to be packaged has been inserted. However, upon opening, the protective packaging is usually so severely damaged that reuse is impossible.

[0005] It is also known in the prior art to use plastics, such as multilayer films, to package the corresponding objects. Such plastic packaging is preferably designed with a zipper to protect an object from damage once inserted into the interior of this packaging. However, a disadvantage is that plastics, and especially multilayer films made from different plastics, are problematic in terms of waste management and are difficult or even impossible to recycle and dispose of.

[0006] Currently, for example, protective packaging is used based on a composite material made from a polypropylene fabric with foam inserts. Cushioning films based on LDPE ("low-density polyethylene") and HDPE ("high-density polyethylene") are also used, with and without zipper systems. While these can be used multiple times, at least twice, they are not recyclable and are therefore currently considered environmentally unfriendly and not environmentally friendly.

[0007] The invention is therefore based on the object of further developing a protective packaging made of paper in such a way that it can be produced easily and inexpensively, can be used multiple times and is nevertheless easily recycled.

[0008] The invention solves the stated problem by means of protective packaging according to the preamble of claim 1, which is characterized in that the upper edge of the rear wall is formed by a flap which projects beyond the upper edge of the front wall, and the front wall has at least one inner layer and at least one outer layer, at least in the region of its upper edge, and is arranged such that the flap can be inserted between an inner layer and an outer layer of the front wall. With the protective packaging according to the invention, an object can be packaged securely and protected from mechanical damage without the need for an adhesive strip, which would make multiple use of the protective packaging difficult or even impossible. The object to be packaged is inserted into the opening between the front wall and rear wall and is thus received in the interior. The opening is located between the upper edges of the two walls, i.e. on the side opposite the lower edge.This opening preferably extends across the entire width of the protective packaging, with the width of the protective packaging corresponding to the length of the upper edges, which is preferably identical to the length of the lower edges. In a preferred embodiment, the front and rear walls are rectangular. Of course, depending on the object to be packaged, other geometric shapes for the front and rear walls are also possible.

[0009] Once the object has been accommodated in the interior, the flap forming the upper edge of the rear wall is inserted into the pocket formed in the front wall. The front wall is formed with at least two layers in the area of ​​its upper edge, so that the flap of the rear wall can be inserted between two layers of the front wall. For this purpose, the upper edge of the rear wall is preferably inserted into the pocket between the inner layer and the outer layer of the front wall.

[0010] In a preferred embodiment, the pocket extends across the entire width of the front wall, and the flap extends across the entire width of the rear wall. This width can be several meters, for example, 2 m, 2.5 m, or 3 m. To make inserting the flap into the pocket of the front wall as easy as possible, it is advantageous to first insert the two side edges of the flap into the pocket and then work toward the center.

[0011] Even if the side edges of the front and rear walls are not connected to each other, which is a possible but not necessary design of the protective packaging, the object is then surrounded by the paper of the protective packaging to such an extent that it is protected against damage, for example due to mechanical stress, such as impacts.

[0012] In a preferred embodiment, the front wall is connected to the back wall along their respective side edges, preferably by adhesive bonding. This ensures that an object accommodated in the interior of the protective packaging is completely surrounded by the paper of the protective packaging and is thus protected as soon as the flap of the back wall is inserted into the pocket of the front wall. Both the back wall and the front wall have an outer side, which in each case designates the side facing away from an object accommodated in the interior of the protective packaging. Preferably, a fastening strip, for example an adhesive strip, is used to connect the back wall to the front wall along the side edges. For this purpose, the fastening strip is arranged on both the outer side of the front wall and the outer side of the back wall.

[0013] The use of one or more such fastening strips ensures that the front wall is securely connected to the back wall, preventing an item contained within the protective packaging from accidentally falling out. At the same time, the available internal volume for the item is not reduced, as no adhesive or other fastening element is required between the front and back walls.

[0014] The side edges of the front wall are usually shorter than the side edges of the rear wall, as the rear wall protrudes beyond the front wall due to the tab. Preferably, the rear wall is connected to the front wall over the entire length of the side edge of the front wall. This can be done using a single fastening strip or using several fastening strips arranged next to each other, possibly overlapping each other. To save material, it can be useful not to connect the rear wall to the front wall over the entire length of the side edge of the front wall, but to connect the rear wall to the front wall only in sections. For this purpose, several fastening strips arranged at a distance from each other can be used.

[0015] Preferably, the interior of the protective packaging is accessible through an opening which can be closed by inserting the flap between the inner layer and the outer layer of the front wall.

[0016] Preferably, the flap is formed integrally with the back panel. This makes the protective packaging particularly easy to manufacture. Alternatively, the flap can also be formed as a separate component that is attached, for example, glued, to the back panel. This allows different materials to be used for the flap and the rest of the back panel, which is particularly advantageous when the flap is exposed to particularly strong mechanical stress.

[0017] Preferably, the tab extends across the entire width of the rear wall and has a length L that extends beyond the top edge of the front wall. The width of the rear wall corresponds to the length of the top edge of the rear wall.

[0018] Preferably, the flap can be inserted into the pocket between the inner layer and the outer layer of the front wall over its entire length L. This is particularly the case when the upper edge of the front wall rests on the back wall when the protective packaging is closed. If this is not the case, for example, because a large object is contained inside the protective packaging, the flap cannot be inserted into the pocket over its entire length L. Nevertheless, the opening between the front wall and the back wall is completely closed by the flap, thus protecting the object inside the protective packaging.

[0019] In a preferred embodiment, both the front wall and the rear wall comprise at least one inner layer and at least one outer layer, with the inner layers being connected, preferably glued, to the displays along the two side edges. The inner layer of the front wall is thus connected to the outer layer of the front wall. The inner layer of the rear wall is thus connected to the outer layer of the rear wall. This ensures that the layers remain in the desired position relative to each other during production of the protective packaging and are not accidentally moved against each other.

[0020] In an alternative embodiment, either the front wall or the rear wall has an inner layer and an outer layer. If, in this case, the front wall has an inner layer and an outer layer, the rear wall is formed as a single layer. If, however, the rear wall has an inner layer and an outer layer, the front wall is formed as a single layer. The single-layer wall is preferably connected to the outer layer of the other wall, which therefore has an inner layer and an outer layer. This connection preferably extends along a portion of the two side edges.

[0021] Preferably, the inner layer of the front wall is connected to the outer layer of the front wall and / or the inner layer of the rear wall is connected to the outer layer of the rear wall along the two side edges from the lower edge to the upper edge.

[0022] In an alternative embodiment, the inner layer of the front wall is not connected to the outer surface of the front wall along a section of the two side edges, wherein the respective section extends from the upper edge and preferably has at least the length L, particularly preferably exactly the length L. This ensures that the width of the pocket available for the flap between the inner layer and the outer surface of the front wall is not reduced by fastening, for example by applied adhesive. The flap of the rear wall, which extends over the entire length of the upper edge, i.e. the width of the protective packaging, thus fits completely into the pocket formed between the inner layer and the outer surface without having to be kinked, folded or deformed in any other way.In order to ensure this for each object to be accommodated in the interior of the protective packaging, it is advantageous if the section along which the inner layer is not connected to the outer system extends over at least the length L. Preferably, the inner layer of the front wall is not connected to the outer layer of the front wall and / or the inner layer of the rear wall is not connected to the outer layer of the rear wall between the two side edges, at least partially, preferably completely.

[0023] Preferably, the outer layer of the back panel is folded over the top edge of the inner layer of the back panel. This makes it easier to insert the top edge of the back panel, i.e., the top edge of the flap, into the pocket, as the two layers forming the back panel cannot separate or move apart.

[0024] Preferably, the outer layer of the back wall is folded over the inner layer in such a way that the upper edge of the inner layer is covered on the front and back by the outer layer of the back wall.

[0025] Preferably, the upper edge of the front panel, preferably the upper edge of the outer surface of the front panel, is folded over and particularly preferably fixed in this position. This fixation can be achieved, for example, by gluing. This smooths the edge of the pocket into which the flap is to be inserted, simplifying insertion.

[0026] In a particularly simple design of the protective packaging, the front wall and the back wall are formed from a multi-layer paper sheet folded along the bottom edges. A multi-layer paper sheet is used as the starting material, the width of which corresponds to the width of the subsequent protective packaging. The length of the paper sheet corresponds to the combined length of the side edge of the front wall and the side edge of the back wall, which also includes the side edge of the flap. Such a multi-layer paper sheet is folded so that one part of it forms the back wall with the flap and another part forms the front wall, which are thus connected to each other along their bottom edges. Preferably, the front wall and the back wall are only connected to each other along their respective bottom edges.

[0027] The protective packaging preferably has no side walls. This means, in particular, that the front wall is directly connected to the rear wall, and no intermediate elements are required. When there is no object inside the protective packaging, the front and rear walls rest against each other. Spacers such as side walls, which would define an interior space of the protective packaging, are not provided. In a particularly simple embodiment, the protective packaging consists of a front and rear wall.

[0028] Preferably, the front wall and / or rear wall of the protective packaging has a puncture resistance of at least 1.0 J, preferably at least 1.1 J, particularly preferably at least 1.2 J and at most 2.5 J, preferably at most 2.2 J, particularly preferably at most 1.9 J.

[0029] The determination of puncture resistance is carried out according to DIN 53142-1:2014-12 (puncture test using a pendulum punch). For example, the following test parameters can be used for measurements with the Type 53805 puncture tester from Karl Frank GmbH:

[0030] Measuring range: 0-6 joules

[0031] Clamping force of the clamping device: 0.6 kN

[0032] The penetration resistance indicates the energy required to penetrate all layers of the sample material with a defined, pyramid-shaped piercing body. The measured value is expressed in joules.

[0033] Ten specimens are tested on the top side and ten on the bottom side, five specimens per test side with the machine direction parallel to the pendulum's axis of rotation, and five specimens with the machine direction orthogonal to the pendulum's axis of rotation. An average is calculated from the 20 individual values ​​obtained in this way. The above-mentioned puncture resistance values ​​are the averages determined in this way.

[0034] An embodiment of the present invention is explained in more detail below with the aid of the accompanying figures. They show:

[0035] Figure 1 - the schematic view of a protective packaging in a

[0036] side and front view,

[0037] Figure 2 - the schematic view of a protective packaging in the opened

[0038] Condition and

[0039] Figure 3 - the schematic view of a protective packaging in the closed state.

[0040] Figure 1 shows a protective packaging according to a first embodiment of the present invention in two schematic representations.

[0041] It has a front wall 2 and a rear wall 4. The rear wall 4 has a tab 6 that projects beyond an upper edge 8 of the front wall. In the front view shown on the right, an adhesive strip 12 is shown on each of the side walls 10 of the front wall 2, by means of which the front wall 2 is connected to the rear wall 4. In the side view shown on the left, it can be seen that the front wall 2 and the rear wall 4 are designed as two layers and each have an inner layer 14 and an outer layer 16. The inner layer 14 and the outer layer 16 of the front wall 2 are connected to one another up to the schematically shown adhesive point 18 starting from the lower edge 20.

[0042] The left-hand illustration shows that the two inner layers 14 and the two outer layers 16 are formed integrally with one another and folded at the bottom edge. In the illustrated embodiment, both the upper edge 22 of the rear wall and the upper edge 22 of the front wall are formed by a folded-over outer layer 16 of the respective wall 2, 4. This is schematically illustrated by the dashed lines in the right-hand front view.

[0043] Figure 2 shows the protective packaging in the opened state. It can be seen in particular that the inner layer 14 and the outer layer 16 of the front wall 2 are not connected to each other in one area starting from the upper edge 8 of the front wall 2. The lower boundary of this area is schematically illustrated by the dashed line 24. It forms the lower boundary of the pocket into which the flap 6 of the rear wall 4 can be inserted. This situation is shown in Figure 3.

[0044] List of reference symbols

[0045] 2 front wall

[0046] 4 Rear wall

[0047] 6 tab

[0048] 8 Upper edge of the front wall

[0049] 10 Side edge

[0050] 12 adhesive strips

[0051] 14 inner layer

[0052] 16 Outer layer

[0053] 18 adhesive points

[0054] 20 bottom edge

[0055] 22 Top edge of the rear wall

[0056] 24 dashed line

Claims

Patent claims 1. Protective packaging made of paper for an object, the protective packaging comprising a. a front wall (2) with an upper edge (8), a lower edge (20) and two opposite side edges (10) and b. a rear wall (4) with an upper edge (22), a lower edge (20) and two mutually opposite side edges (10), wherein the front wall (2) and the rear wall (4) are connected to one another along their lower edges (20) so that an interior space for receiving the object is present between the front wall (2) and the rear wall (4), characterized in that the upper edge (22) of the rear wall (4) is formed by a tab (6) which projects beyond the upper edge (8) of the front wall (2), and the front wall (2) has at least one inner layer (14) and at least one outer layer (16) at least in the region of its upper edge (8) and is arranged such that the tab (6) can be inserted between an inner layer (14) and an outer layer (16) of the front wall (2).

2. Protective packaging according to claim 1, characterized in that the front wall (2) is connected, preferably glued, to the rear wall (4) along its side edges (10), 3. Protective packaging according to claim 1 or 2, characterized in that the interior is accessible through an opening which is closed by inserting the tab (6) between the inner layer (14) and the outer layer (16) of the front wall (2).

4. Protective packaging according to one of the preceding claims, characterized in that the tab (6) extends over an entire width of the rear wall (4) and has a length L by which it projects beyond the upper edge (8) of the front wall (2).

5. Protective packaging according to one of the preceding claims, characterized in that the front wall (2) and the rear wall (4) have at least one inner layer (14) and at least one outer layer (16), wherein the inner layers (14) are each connected, preferably glued, to the outer layers (16) along the two side edges (10).

6. Protective packaging according to claim 5, characterized in that the inner layer (14) and the outer layer (16) of the rear wall (4) and / or the front wall (2) are connected to one another along the two side edges (10) from the lower edge (20) to the upper edge (8, 22).

7. Protective packaging according to claim 5 or 6, characterized in that the inner layer (14) of the front wall (2) is not connected to the outer layer (16) of the front wall (2) along a section of the two side edges (10), wherein the section extends from the upper edge (8) and preferably has at least the length L, preferably exactly the length L.

8. Protective packaging according to one of claims 5 to 7, characterized in that the inner layer (14) and the outer layer (16) of the front wall (2) and / or the rear wall (4) are at least partially, but preferably completely, not connected to one another in a region between the two side edges (10).

9. Protective packaging according to one of the preceding claims, characterized in that the outer layer (16) of the rear wall (4) is folded over an upper edge of the inner layer (14) of the rear wall (4).

10. Protective packaging according to claim 9, characterized in that the outer layer (16) of the rear wall (4) is folded over the inner layer of the rear wall (4) in such a way that the upper edge of the inner layer is covered on the front and back by the outer layer of the rear wall.

11. Protective packaging according to one of the preceding claims, characterized in that the upper edge (8) of the front wall (2), preferably the upper edge (22) of the outer layer (4) of the front wall (2), is folded over and preferably fixed in this position, particularly preferably glued.

12. Protective packaging according to one of the preceding claims, characterized in that the front wall (2) and the rear wall (4) are formed from a multi-layer paper sheet folded along the lower edges (20).

13. Protective packaging according to one of the preceding claims, characterized in that the front wall (2) and the rear wall (4) are connected to each other only along their lower edge.

14. Protective packaging according to one of the preceding claims, characterized in that the protective packaging has no side walls.

15. Protective packaging according to one of the preceding claims, characterized in that the front wall and / or the rear wall has a puncture resistance of at least 1.0 J, preferably at least 1.1 J, particularly preferably at least 1.2 J and at most 2.5 J, preferably at most 2.2 J, particularly preferably at most 1.9 J.

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