Packaging film joint structure and crop packaging film

Abstract

The utility model relates to the technical field of packaging materials, and provides a packaging film connector structure and a crop packaging film, the packaging film connector structure comprises an easy-to-tear line which is arranged on the packaging film so that the packaging film can be broken and segmented at the easy-to-tear line, and a packaging film connector is arranged on the easy-to-tear line. The section of the packaging film at each easy-to-tear line is marked as a front section of packaging film and a rear section of packaging film; the connecting layer comprises a first connecting layer and a second connecting layer; wherein part of the first connecting layer is connected with the second connecting layer, part of the first connecting layer is connected to the rear section of the packaging film, part of the first connecting layer is connected to the front section of the packaging film, and the second connecting layer is connected to the front section of the packaging film through the first adhesive layer. The packaging film is convenient to machine, the connector structure of the packaging film can be prevented from being broken in advance, and meanwhile it is guaranteed that the first connecting layer is reserved on the next section of packaging film to serve as a leading head to be obtained by packaging equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging materials, in particular to a joint structure of a packaging film and a crop packaging film. Background Art

[0002] The integrated cotton picking and baling machine can achieve full mechanization of cotton harvesting and baling, effectively avoiding the problem of traditional cotton pickers being contaminated by impurities such as hair during cotton transportation, greatly improving the quality of cotton, and solving a series of problems from cotton harvesting and transportation to stacking and storage in the cotton ginning plant.

[0003] Cotton baling film is a length of material used to wrap and bale cotton. One section of film is used to wrap one bale of cotton. During the cotton baling film production process, multiple independent sections are typically joined end-to-end with joints to form a roll for easier storage and automated packaging.

[0004] Existing cotton packaging film joint solutions use imported manufacturers' product structures, namely the so-called "Z-Lock" two-section film splicing structure. For example, patent document CN200580020614.5 discloses a packaging material and its manufacturing and use method using a Z-lock system. This Z-lock structure connects cotton packaging films together. However, this structure has the following drawbacks in actual use:

[0005] like Figure 1 As shown, the two sections of packaging film require complex processing such as splicing and folding, resulting in low production efficiency and low product yield. During the unwinding process of the packaging film roll 1, the connecting part is easily disconnected prematurely due to the shear force at the conveyor roller. This will prevent the subsequent section of packaging film from being picked up by conveyor rollers 2 or 3 and transferred to the packaging station for the target object 4.

[0006] Patent document CN220200104U discloses a packaging film joint structure and crop packaging film. Although it solves the problem of complex processing technology such as splicing and folding the front and rear sections of packaging film, during the unwinding process, due to the action of tension, the connection between the release film and the previous section of packaging film is likely to break before the tear line due to the weak bonding force of the release film. Therefore, there is still a possibility that the latter section of packaging film cannot be captured by the conveyor roller 2 or the conveyor roller 3 and transmitted to the packaging station of the target object 4. Utility Model Content

[0007] In view of the defects in the prior art, the purpose of the present invention is to provide a packaging film joint structure and a crop packaging film.

[0008] According to the utility model, a packaging film joint structure is provided, comprising:

[0009] The easy-tear line 6 is provided on the packaging film 5 so that the packaging film 5 can be broken into sections at the easy-tear line 6. The packaging film 5 divided into sections at each easy-tear line 6 is recorded as a preceding section of packaging film 501 and a following section of packaging film 502.

[0010] A connecting layer, comprising a first connecting layer 9 and a second connecting layer 10;

[0011] Part of the first connecting layer 9 is connected to the second connecting layer 10 , part of it is connected to the rear packaging film 502 , and part of it is connected to the front packaging film 501 . The second connecting layer 10 is connected to the front packaging film 501 through the first adhesive layer 7 .

[0012] Furthermore, the length of the connecting layer is greater than the length of the packaging film 5 between the first adhesive layer 7 and the connection point of the connecting layer at the subsequent packaging film 502 .

[0013] Furthermore, the bonding force between the first connecting layer 9 and the preceding packaging film 501 is greater than the bonding force between the preceding packaging film 501 and the following packaging film 502;

[0014] The bonding force between the first connecting layer 9 and the first section of the packaging film 501 is smaller than the bonding force between the first connecting layer 9 and the second section of the packaging film 502;

[0015] The bonding force between the second connecting layer 10 and the first connecting layer 9 is greater than the bonding force between the second connecting layer 10 and the first adhesive layer 7 , and the bonding force between the first adhesive layer 7 and the previous packaging film 501 is greater than the bonding force between the second connecting layer 10 and the first adhesive layer 7 .

[0016] Furthermore, the first connecting layer 9 has a first end and a second end, and the first end is adhered to the latter packaging film 502 via the second adhesive layer 8, or the first end is fixedly connected to the latter packaging film 502;

[0017] The second end portion is connected to the second connection layer 10 .

[0018] Furthermore, the second connecting layer 10 is in a flat state between the second end portion and the first adhesive layer 7; or, the second connecting layer 10 is in a folded state between the second end portion and the first adhesive layer 7, the second end portion and the first adhesive layer 7 are bonded to the same side of the second connecting layer 10, the connection surface between the second connecting layer 10 and the second end portion is larger than the connection surface between the second connecting layer 10 and the first adhesive layer 7, or, the second connecting layer 10 and the second end portion are fixedly connected.

[0019] Furthermore, the second connecting layer 10 includes a release layer, a release surface of the release layer is bonded to the first adhesive layer 7 , and a non-release surface of the second connecting layer 10 is connected to the second end portion.

[0020] Furthermore, the first connecting layer 9 is in a folded state, and the bent portion is bonded to the previous section of the packaging film 501 .

[0021] Furthermore, the first connecting layer 9 and the packaging film 5 are made of the same material.

[0022] The crop packaging film provided by the present invention includes a packaging film 5 and the packaging film joint structure provided on the packaging film 5 .

[0023] Furthermore, the crop packaging film includes cotton packaging film.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The packaging film joint structure of the present invention can be prefabricated and attached to the packaging film through a simple bonding process. The connecting layer is divided into a first connecting layer and a second connecting layer. By bonding the first connecting layer to the preceding packaging film segment, the packaging film joint structure is prevented from breaking before the tear line breaks, allowing the packaging film joint structure to be fully stretched after the tear line breaks. The second connecting layer facilitates separation of the packaging film joint structure from the preceding packaging film segment, allowing the first connecting layer, after being stretched by the preceding packaging film segment, to separate smoothly from the preceding packaging film segment, leaving the first connecting layer on the following packaging film segment as a leader for capture by the packaging equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Other features, objects and advantages of the present invention will become more apparent from the detailed description of the non-limiting embodiments with reference to the following drawings:

[0027] Figure 1 This is a schematic diagram of a traditional packaging film roll during unwinding and packaging;

[0028] Figure 2 This is a side view of the first packaging film joint structure of the utility model;

[0029] Figure 3 This is a schematic diagram of the packaging process of the first packaging film joint structure of the utility model;

[0030] Figure 4 This is a side view of the second packaging film joint structure of the utility model;

[0031] Figure 5 This is a schematic diagram of the packaging process of the second packaging film joint structure of the present invention. DETAILED DESCRIPTION

[0032] The present invention will be described in detail below with reference to specific embodiments. The following embodiments will help those skilled in the art further understand the present invention, but are not intended to limit the present invention in any way. It should be noted that a person skilled in the art may make various variations and improvements without departing from the scope of the present invention. Such variations and improvements are all within the scope of protection of the present invention.

[0033] Example 1

[0034] like Figure 2 and Figure 3 As shown, a packaging film joint structure is provided with a tear line 6 on the packaging film 5. The tear line 6 can be a dotted cutting line obtained by punching or a straight line segment. This allows the packaging film to be easily separated at the tear line to obtain a section of packaging film of the desired length for packaging the target object. The packaging film 5 segmented at each tear line 6 is denoted as the previous packaging film section 501 and the next packaging film section 502. The number of tear lines 6 is not limited and can be provided according to actual needs. The tear line 6 is typically oriented along the width of the packaging film 5, but this is not a limitation in the present invention.

[0035] The packaging film joint structure also includes a connecting layer, which includes a first connecting layer 9 and a second connecting layer 10. The first connecting layer 9 is partially connected to the second connecting layer 10. The first connecting layer 9 is partially connected to the subsequent packaging film 502 and partially connected to the previous packaging film 501. The second connecting layer 10 is connected to the previous packaging film 501 via the first adhesive layer 7. The length of the connecting layer is greater than the length of the packaging film 5 between the first adhesive layer 7 and the connection point of the connecting layer with the subsequent packaging film 502. This can initially prevent the connecting layer from breaking before the tear line 6 during the stretching process of the packaging film 5.

[0036] It should be noted that:

[0037] The bonding force between the first connecting layer 9 and the preceding packaging film 501 is greater than the bonding force between the preceding packaging film 501 and the succeeding packaging film 502. This can further prevent the connecting layer from being disconnected before the tear line 6 during the stretching process of the packaging film 5. Furthermore, it can protect the connection between the second connecting layer 10 and the first adhesive layer 7, preventing the two from separating or shifting due to weak bonding force.

[0038] The bonding force between the first connecting layer 9 and the preceding packaging film 501 is smaller than the bonding force between the first connecting layer 9 and the following packaging film 502. This ensures that the packaging film joint structure separates from the preceding packaging film 501 when stretched, and remains on the following packaging film 502 as a leader.

[0039] The bonding force between the second connecting layer 10 and the first connecting layer 9 is greater than the bonding force between the second connecting layer 10 and the first adhesive layer 7, and the bonding force between the first adhesive layer 7 and the previous section of the packaging film 501 is greater than the bonding force between the second connecting layer 10 and the first adhesive layer 7. This ensures that the second connecting layer 10 is separated from the first adhesive layer 7, and the first adhesive layer 7 remains on the previous section of the packaging film 501. After packaging is completed, it can be used to bond the end of the previous section of the packaging film 501 to the packaged body.

[0040] In this embodiment, the first connecting layer 9 avoids the use of a release layer and can be made of the same material as the packaging film 5. Partially, it is bonded to the subsequent packaging film 502 by direct fixing or via the second adhesive layer 8. Partially, it is directly bonded to the preceding packaging film 501. Partially, it is bonded to the second connecting layer 10. The second connecting layer 10 is bonded to the preceding packaging film 501 via the first adhesive layer 7. The second connecting layer 10 can be a release layer. Specifically, the first connecting layer 9 has a first end and a second end. The first end is bonded to the subsequent packaging film 502 via the second adhesive layer 8, or alternatively, the first end is fixedly bonded to the subsequent packaging film 502; the second end is bonded to the second connecting layer 10.

[0041] Because the first connecting layer 9 is relatively long, in this case, to facilitate smooth winding and storage, the first connecting layer 9 is folded. The first connecting layer 9 has a first end and a second end. The first end is adhered to the subsequent packaging film 502 via the second adhesive layer 8, or the first end is fixedly connected to the subsequent packaging film 502. The second end is connected to the second connecting layer 10, which is adhered to the previous packaging film 501 via the first adhesive layer 7. The bend of the first connecting layer 9 is located on the previous packaging film 501, and its opening faces the subsequent packaging film 502.

[0042] The longer first connecting layer 9 can form a leading edge for the subsequent packaging film 502, allowing the subsequent packaging film 502 to be captured and pulled by the equipment after the previous packaging film 501 is separated from the subsequent packaging film 502. The second connecting layer 10 is laid flat between the second end portion and the first adhesive layer 7. When the second connecting layer 10 is a release layer, the release surface adheres to the first adhesive layer 7, while the non-release surface of the second connecting layer 10 is connected to the second end portion, ensuring that the second connecting layer 10 can be separated from the first adhesive layer 7 while remaining on the first connecting layer 9.

[0043] In this embodiment, there is a preset distance between the back side of the first adhesive layer 7 and the easy-tear line 6. The preset distance is preferably greater than 0 and less than or equal to 50 mm. After the crops are wound and packaged, the packaging film 5 within this distance will extend outside the packaged crop roll. The purpose of setting the preset distance is to reduce the positioning accuracy requirements when bonding the packaging film joint structure. Not reserving a distance (the preset distance is equal to 0) is to avoid the probability that the packaging film 5 will be subjected to normal force due to squeezing and pulling by the crop straw after being wound and packaged, thereby preventing the fixed packaged crops from failing to adhere and falling apart.

[0044] Example 2

[0045] like Figure 4 and Figure 5 As shown, a packaging film joint structure is provided with a tear line 6 on the packaging film 5. The tear line 6 can be a dotted cutting line obtained by punching, or a straight line segment cut out, allowing the packaging film to be easily broken into sections at the tear line, thereby obtaining a section of packaging film of the desired length for packaging the target object. The number of tear lines 6 is not limited and can be provided according to actual needs. The tear line 6 is typically oriented in the width direction of the packaging film 5, but can also be an oblique line at a certain angle to the width direction, which is not limited by the present invention.

[0046] The packaging film joint structure also includes a connecting layer, which includes a first connecting layer 9 and a second connecting layer 10. The first connecting layer 9 is partially connected to the second connecting layer 10. The first connecting layer 9 is partially connected to the subsequent packaging film 502 and partially connected to the previous packaging film 501. The second connecting layer 10 is connected to the previous packaging film 501 via the first adhesive layer 7. The length of the connecting layer is greater than the length of the packaging film 5 between the first adhesive layer 7 and the connection point of the connecting layer with the subsequent packaging film 502. This can initially prevent the connecting layer from breaking before the tear line 6 during the stretching process of the packaging film 5.

[0047] It should be noted that:

[0048] The bonding force between the first connecting layer 9 and the preceding packaging film 501 is greater than the bonding force between the preceding packaging film 501 and the succeeding packaging film 502. This can further prevent the connecting layer from being disconnected before the tear line 6 during the stretching process of the packaging film 5. Furthermore, it can protect the connection between the second connecting layer 10 and the first adhesive layer 7, preventing the two from separating or shifting due to weak bonding force.

[0049] The bonding force between the first connecting layer 9 and the preceding packaging film 501 is smaller than the bonding force between the first connecting layer 9 and the following packaging film 502. This ensures that the packaging film joint structure separates from the preceding packaging film 501 when stretched, and remains on the following packaging film 502 as a leader.

[0050] The bonding force between the second connecting layer 10 and the first connecting layer 9 is greater than the bonding force between the second connecting layer 10 and the first adhesive layer 7, and the bonding force between the first adhesive layer 7 and the previous section of the packaging film 501 is greater than the bonding force between the second connecting layer 10 and the first adhesive layer 7. This ensures that the second connecting layer 10 is separated from the first adhesive layer 7, and the first adhesive layer 7 remains on the previous section of the packaging film 501. After packaging is completed, it can be used to bond the end of the previous section of the packaging film 501 to the packaged body.

[0051] In this embodiment, the first connecting layer 9 avoids the use of a release layer and can be made of the same material as the packaging film 5. Partially, it is bonded to the subsequent packaging film 502 by direct fixing or via the second adhesive layer 8. Partially, it is directly bonded to the preceding packaging film 501. Partially, it is bonded to the second connecting layer 10. The second connecting layer 10 is bonded to the preceding packaging film 501 via the first adhesive layer 7. The second connecting layer 10 can be a release layer. Specifically, the first connecting layer 9 has a first end and a second end. The first end is bonded to the subsequent packaging film 502 via the second adhesive layer 8, or alternatively, the first end is fixedly bonded to the subsequent packaging film 502; the second end is bonded to the second connecting layer 10.

[0052] Because the first connecting layer 9 is relatively long, in this case, to facilitate smooth winding and storage, the first connecting layer 9 is folded. The first connecting layer 9 has a first end and a second end. The first end is adhered to the subsequent packaging film 502 via the second adhesive layer 8, or the first end is fixedly connected to the subsequent packaging film 502. The second end is connected to the second connecting layer 10, which is adhered to the previous packaging film 501 via the first adhesive layer 7. The bend of the first connecting layer 9 is located on the previous packaging film 501, and its opening faces the subsequent packaging film 502.

[0053] The longer first connecting layer 9 can form a leading edge for the rear section of the packaging film 502, so that after the front section of the packaging film 501 is separated from the rear section of the packaging film 502, the rear section of the packaging film 502 can still be captured and pulled by the equipment. The second connecting layer 10 is folded between the second end portion and the first adhesive layer 7. When the second connecting layer 10 is a release layer, the second end portion and the first adhesive layer 7 are bonded to the same side of the second connecting layer 10 (the release surface side). The connecting surface between the second connecting layer 10 and the second end portion is larger than the connecting surface between the second connecting layer 10 and the first adhesive layer 7, or the second connecting layer 10 and the second end portion are fixedly connected.

[0054] The release surface is bonded to the first adhesive layer 7 , and the non-release surface of the second connecting layer 10 is connected to the second end, ensuring that the second connecting layer 10 can be separated from the first adhesive layer 7 and remain on the first connecting layer 9 .

[0055] In this embodiment, there is a preset distance between the back side of the first adhesive layer 7 and the easy-tear line 6. The preset distance is preferably greater than 0 and less than or equal to 50 mm. After the crops are wound and packaged, the packaging film 5 within this distance will extend outside the packaged crop roll. The purpose of setting the preset distance is to reduce the positioning accuracy requirements when bonding the packaging film joint structure. Not reserving a distance (the preset distance is equal to 0) is to avoid the probability that the packaging film 5 will be subjected to normal force due to squeezing and pulling by the crop straw after being wound and packaged, thereby preventing the fixed packaged crops from failing to adhere and falling apart.

[0056] Example 3

[0057] A crop packaging film comprises a packaging film and packaging film joint structures of embodiment 1 and embodiment 2 arranged on the packaging film. The packaging film can be used for winding and packaging crops, especially cotton.

[0058] Example 4

[0059] This embodiment provides a method for preparing a packaging film joint structure, comprising:

[0060] Packaging film processing step: Prepare a tear line 6 on the packaging film 5. The tear line 6 can be a dotted line obtained by punching, or a straight line segment cut out, so that the packaging film can be easily broken into segments at the tear line to obtain a piece of packaging film of the desired length for packaging the target object.

[0061] Prefabricated part production steps: connect the second connecting layer 10 to the second end of the first connecting layer 9, connect the first adhesive layer 7 to the first connecting layer 9, or connect the second adhesive layer 8 to the first end of the first connecting layer 9 at the same time. This partial structure can be prepared in advance.

[0062] Joint bonding step: The structure produced in the prefabrication step is connected to the packaging film 5. Specifically, the first adhesive layer 7 is connected to the preceding packaging film 501. The first end portion is fixedly connected or connected to the following packaging film 502 via the second adhesive layer 8. The first connecting layer 9 is folded and bonded to the preceding packaging film 501. The fixed connection method can be ultrasonic welding, which is not limited in this invention.

[0063] In the description of this application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0064] The above describes specific embodiments of the present invention. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless there is a conflict, the embodiments of this application and the features in the embodiments may be combined with each other in any manner.

Claims

1. A packaging film joint structure, characterized in that: include: An easy-tear line (6) is provided on the packaging film (5), so that the packaging film (5) can be broken into sections at the easy-tear line (6), and the packaging film (5) divided into sections at each easy-tear line (6) is recorded as a previous section of packaging film (501) and a subsequent section of packaging film (502); A connecting layer comprising a first connecting layer (9) and a second connecting layer (10); Part of the first connecting layer (9) is connected to the second connecting layer (10), part of it is connected to the rear packaging film (502), and part of it is connected to the front packaging film (501). The second connecting layer (10) is connected to the front packaging film (501) through the first adhesive layer (7).

2. The packaging film joint structure according to claim 1, characterized in that: The length of the connecting layer is greater than the length of the packaging film (5) between the first adhesive layer (7) and the connection point of the connecting layer with the latter section of the packaging film (502).

3. The packaging film joint structure according to claim 1, characterized in that: The bonding force between the first connecting layer (9) and the preceding packaging film (501) is greater than the bonding force between the preceding packaging film (501) and the following packaging film (502); The bonding force between the first connecting layer (9) and the first section of the packaging film (501) is smaller than the bonding force between the first connecting layer (9) and the second section of the packaging film (502); The bonding force between the second connecting layer (10) and the first connecting layer (9) is greater than the bonding force between the second connecting layer (10) and the first adhesive layer (7), and the bonding force between the first adhesive layer (7) and the previous packaging film (501) is greater than the bonding force between the second connecting layer (10) and the first adhesive layer (7).

4. The packaging film joint structure according to claim 1, characterized in that: The first connecting layer (9) has a first end and a second end, the first end being bonded to the rear packaging film (502) via a second adhesive layer (8), or the first end being fixedly connected to the rear packaging film (502); The second end portion is connected to the second connecting layer (10).

5. The packaging film joint structure according to claim 4, characterized in that: The second connecting layer (10) is in a flat state between the second end portion and the first adhesive layer (7); or the second connecting layer (10) is in a folded state between the second end portion and the first adhesive layer (7), the second end portion and the first adhesive layer (7) are bonded to the same side of the second connecting layer (10), the connection surface between the second connecting layer (10) and the second end portion is larger than the connection surface between the second connecting layer (10) and the first adhesive layer (7), or the second connecting layer (10) and the second end portion are fixedly connected.

6. The packaging film joint structure according to claim 5, characterized in that: The second connecting layer (10) comprises a release layer, a release surface of the release layer is bonded to the first adhesive layer (7), and a non-release surface of the second connecting layer (10) is connected to the second end portion.

7. The packaging film joint structure according to claim 1, characterized in that: The first connecting layer (9) is in a folded state, and the bent portion is bonded to the previous section of the packaging film (501).

8. The packaging film joint structure according to claim 7, characterized in that: The first connecting layer (9) is made of the same material as the packaging film (5).

9. A crop packaging film, characterized in that: It comprises a packaging film (5), and the packaging film joint structure according to any one of claims 1 to 8 arranged on the packaging film (5).

10. The crop packaging film according to claim 9, characterized in that: The crop packaging film includes cotton packaging film.

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