A kind of cotton packing film

Abstract

The present application relates to a cotton packing film, belonging to the technical field of agricultural packaging materials, which comprises a plurality of packaging film units connected in sequence. A first tearable area is provided between adjacent two packaging film units. A connecting belt is connected between adjacent two packaging film units. The connecting belt comprises a release film, a left adhesive layer adhered to the rear packaging film unit, and a right adhesive layer adhered to the front packaging film. The left adhesive layer and the right adhesive layer are located on the same side of the packaging film unit. One end of the release film is adhered to the left adhesive layer. The front packaging film unit is bent and folded to cause the right adhesive layer to be laminated and adhered to the release film at the other end. The left adhesive layer and the right adhesive layer are respectively located on the upper and lower sides of the release film. The release film of this cotton packing film can be peeled off from the right adhesive layer more smoothly, so that the packed cotton is not prone to spreading.

Description

Technical Field

[0001] The present application relates to the technical field of agricultural packaging materials, and particularly relates to a cotton packing film. Background Art

[0002] At present, when an automated cotton picker is working, it can collect and pack cotton. A roll film will be installed on the reel of the cotton picker. The roll film is divided into several packaging segments, and each packaging segment includes a non-sticky roll film segment and a sticky roll film segment. For example, Chinese Patent No. CN110606276A discloses a cotton packing roll film, which includes a roll film substrate composed of multiple packaging segments connected end to end. The packaging segment includes a sticky area and a non-sticky area connected to the sticky area. One end of the sticky area of the previous packaging segment connected to the non-sticky area of the next packaging segment is a folded end in a "Z" shape. A separable bonding structure is provided between the two end faces of the folded end near the concave part in the middle of the sticky area. The separable bonding structure includes a strong adhesive layer, a separable layer, and a bonding agent layer. The strong adhesive layer and the bonding agent layer are respectively located on the two end faces of the folded end near the concave part in the middle of the sticky area, and the separable layer is located between the strong adhesive layer and the bonding agent layer; a tear line for separation during packaging is provided at the intersection of the sticky area of the previous packaging segment and the non-sticky area of the next packaging segment. The separable bonding structure includes a strong adhesive layer, a separable layer, and a bonding agent layer. When the roll film is wound on the reel, the separable layer covers the bonding agent layer to prevent the different layers wound on the reel from bonding to each other; however, when the roll film is unrolled and used to pack cotton, the separable layer will peel off from the bonding agent layer and be completely separated at the end of a packaging segment cycle, and the bonding agent layer is used to bond to the next sticky area for sealing at the end of the packaging segment cycle; when the reel stops rotating at the end of a packaging segment cycle, the cotton being packed will cause the tear line to crack due to the pulling force generated by the rotational inertia, so as to separate the packaging segment during packaging, and thus a packing can be completed.

[0003] Regarding the above related technologies, the inventor believes that: during the packing and pulling process of the above cotton packing film, it is necessary to first peel off the separable layer from the bonding agent layer, and then make the tear line crack so that the bonding agent layer can bond to the next sticky area for sealing. If the tear line breaks first, the subsequent separable layer cannot be peeled off from the bonding agent layer, and thus the bonding agent layer cannot bond to the next sticky area for sealing, and the cotton packed in this way is very likely to become loose. Summary of the Invention

[0004] In order to make the peeling film peel off from the right bonding agent layer more smoothly, so that the cotton packed is not likely to become loose, the present application provides a cotton packing film.

[0005] A cotton packing film provided by the present application adopts the following technical solution:

[0006] A cotton packing film includes a plurality of packaging film units connected in sequence. There is a first tear-away area between adjacent two packaging film units. A connecting band is connected between adjacent two packaging film units. The connecting band includes a release film, a left adhesive layer adhered to the rear packaging film unit, and a right adhesive layer adhered to the front packaging film. The left adhesive layer and the right adhesive layer are located on the same side of the packaging film unit. One end of the release film adheres to the left adhesive layer. When the front packaging film unit is bent and folded, the right adhesive layer is pressed and adhered to the release film at the other end. The left adhesive layer and the right adhesive layer are respectively located on the upper and lower sides of the release film.

[0007] By adopting the above technical solution, when a pulling force is generated between adjacent two packaging film units, first, the right adhesive layer can be slowly peeled off from the release film, and the bent and folded part of the front packaging film unit will also be straightened. When continuing to pull later, adjacent two packaging film units will break at the first tear-away area and separate from each other. Because both ends of the release film are respectively bonded to adjacent two packaging film units, even if the first tear-away area breaks first during the pulling process, adjacent two packaging film units can still be connected together through the connecting band. During the subsequent pulling process, the release film can be peeled off from the right adhesive layer under the action of the rear packaging film unit, and the right adhesive layer still adheres to the front packaging film unit. Such a structure can achieve a double-insurance effect, enabling the release film to be peeled off from the right adhesive layer more smoothly, and preventing the cotton packed from being scattered easily.

[0008] Optionally, the first tear-away area includes a plurality of through holes linearly arranged along the width direction of the packaging film unit.

[0009] Optionally, the hole pitch of the through holes gradually becomes smaller from the center position of the packaging film unit to the left and right sides in its width direction.

[0010] By adopting the above technical solution, during the pulling process of two packaging film units, the middle position of the two packaging film units breaks first than the two sides, so that the packaging film units are not prone to deviation.

[0011] Optionally, the size of the through holes gradually becomes smaller from the center position of the packaging film unit to the left and right sides in its width direction.

[0012] By adopting the above technical solution, during the pulling process of two packaging film units, the middle position of the two packaging film units breaks first than the two sides, so that the packaging film units are not prone to deviation.

[0013] Optionally, the first tearable area is a long strip-shaped through hole extending in the width direction of the packaging film unit.

[0014] By adopting the above technical solution, the first tearable area is a long strip-shaped through hole. During the pulling process of two adjacent packaging film units, the separation of the two packaging film units can be achieved only by the disconnection of both sides of the packaging film unit.

[0015] Optionally, on the other side of the release film relative to the right adhesive layer, there is a lower adhesive layer adhesively bonded to the front section of the packaging film unit, and the release film is provided with a second tearable area.

[0016] By adopting the above technical solution, after the release film is peeled off from the right adhesive layer, the release film will have adhesiveness. The release film with adhesiveness remains on the first half of the rear section of the packaging film unit. During the subsequent packing process, the release film with adhesiveness will adhere to the cotton, thus affecting the subsequent unpacking. However, in this application, through the setting of the second tearable area, after two adjacent packaging film units are separated, the release film will also be divided into two halves. One half is adhesively bonded to the rear section of the packaging film unit through the left adhesive layer, and the other half is adhesively bonded to the second half of the front section of the packaging film unit through the lower adhesive layer. During the subsequent packing process, the release film with adhesiveness will adhere to the outer wall of the packaging film unit and will not adhere to the cotton, thus facilitating the subsequent unpacking.

[0017] In summary, this application includes at least one of the following beneficial technical effects:

[0018] When the front section of the packaging film unit and the rear section of the packaging film unit are first disconnected, since one end of the release film is adhesively bonded to the front section of the packaging film unit and the other end is adhesively bonded to the rear section of the packaging film unit, during the subsequent pulling process, the release film can also be smoothly peeled off from the right adhesive layer, so that the cotton packed is not likely to come loose.

[0019] A second tearable area is provided on the release film. After the front section of the packaging film unit and the rear section of the packaging film unit are disconnected, the release film will also be divided into two halves. One half is adhesively bonded and fixed to the rear section of the packaging film unit, and the other half is fixed to the front-end packaging film unit. Such a structure makes the release film with adhesiveness not likely to adhere to the cotton, facilitating the subsequent unpacking. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of Embodiment 1.

[0021] Figure 2 is Figure 1 a schematic structural diagram after the release film and the right adhesive layer are peeled off in

[0022] Figure 3 is Figure 2Schematic diagram of the structure after the front - segment packaging film unit and the rear - segment packaging film unit are disconnected.

[0023] Figure 4 It is a schematic diagram of the structure of the first tear - prone area in the first embodiment.

[0024] Figure 5 It is a schematic diagram of the structure of the second embodiment.

[0025] Figure 6 It is Figure 5 Schematic diagram of the structure after the release film and the right adhesive layer are peeled off.

[0026] Figure 7 It is Figure 6 Schematic diagram of the structure after the front - segment packaging film unit and the rear - segment packaging film unit are disconnected.

[0027] Figure 8 It is a schematic diagram of the structure of the second tear - prone area in the second embodiment.

[0028] Explanation of reference numerals: 1. The first tear - prone area; 2. Connecting belt; 21. Release film; 22. Left adhesive layer; 23. Right adhesive layer; 3. Through - hole; 4. Long - strip through - hole; 5. Lower adhesive layer; 6. The second tear - prone area; 7. Front - segment packaging film unit; 8. Rear - segment packaging film unit. Detailed implementation manners

[0029] The following further elaborates on this application in conjunction with the attached Figures 1-8 drawings for a more detailed description.

[0030] Embodiment 1. An embodiment of this application discloses a cotton bale - wrapping film. Referring to Figure 1 , the cotton bale - wrapping film includes a plurality of sequentially connected packaging film units. A first tear - prone area 1 is provided between the front - segment packaging film unit 7 and the rear - segment packaging film unit 8. When the front - segment packaging film unit 7 and the rear - segment packaging film unit 8 are pulled, they can be disconnected at the first tear - prone area 1. A connecting belt 2 is also provided between the front - segment packaging film unit 7 and the rear - segment packaging film unit 8. The connecting belt 2 includes a release film 21, a left adhesive layer 22, and a right adhesive layer 23. The left adhesive layer 22 is bonded to the rear - segment packaging film unit 8, the right adhesive layer 23 is bonded to the front - segment packaging film unit 7. One end of the release film 21 adheres to the left adhesive layer 22. When the front - segment packaging film unit 7 is bent and folded, the right adhesive layer 23 is pressed and adhered to the other end of the release film 21. The left adhesive layer 22 and the right adhesive layer 23 are respectively located on the upper and lower sides of the release film 21, and the left adhesive layer 22 and the right adhesive layer 23 are respectively located on the left and right sides of the first tear - prone area 1.

[0031] Referring to Figure 2, after the current section packaging film unit 7 and the subsequent section packaging film unit 8 are pulled, first, the bent part of the front section packaging film unit 7 will be slowly straightened, and at the same time, the release film 21 will also be peeled off from the right adhesive layer 23, and the right adhesive layer 23 remains adhered and fixed to the front section packaging film unit 7; Refer to Figure 3 , during the process of continuing to pull after the front section packaging film unit 7 is straightened, the front section packaging film unit 7 and the subsequent section packaging film unit 8 will break at the first tear area 1.

[0032] Refer to Figure 4 , the first tear area 1 includes a plurality of through holes 3 linearly arranged along the width direction of the packaging film unit. The hole pitch of the through holes 3 gradually decreases from the central position of the packaging film unit to the left and right sides in its width direction, and the size of the through holes 3 gradually decreases from the central position of the packaging film unit to the left and right sides in its width direction. In this way, during the process of pulling the front section packaging film unit 7 and the subsequent section packaging film unit 8, the break occurs gradually from the middle position of the first tear area 1 to the left and right sides in the width direction of the packaging film unit. Such a structure makes it difficult for the packaging film unit to deviate.

[0033] The implementation principle of a cotton packaging film in an embodiment of the present application is as follows: Initially, the left adhesive layer 22 and the right adhesive layer 23 are covered by the release film 21 to prevent the different layers from adhering to each other when the packaging film unit is wound around the reel; during the process of packing cotton with the front section packaging film unit 7, the cotton will be wound and packed in the packaging film unit, and the packaging film unit will wind multiple layers of cotton. When one packaging film unit finishes winding, a pulling force will be generated between the front section packaging film unit 7 and the subsequent section packaging film unit 8. After the release film 21 is peeled off from the right adhesive layer 23, at the same time, the front section packaging film unit 7 and the subsequent section packaging film unit 8 break at the first tear area 1, and the right adhesive layer 23 will adhere to the outer wall of the front section packaging film unit 7 to seal the packed packaging film unit, thus completing one packing.

[0034] Embodiment 2, refer to Figure 5 , the main difference technical feature from Embodiment 1 is that: a second tear area 6 is provided on the release film 21, the first tear area 1 and the second tear area 6 are vertically corresponding, and a lower adhesive layer 5 is also adhered to the release film 21 on the other side of the right adhesive layer 23, and the lower adhesive layer 5 is adhered to the front-end packaging film unit.

[0035] Refer to Figure 6 , after the front section packaging film unit 7 and the subsequent section packaging film unit 8 are pulled, first, the bent part of the front section packaging film unit 7 will be slowly straightened, and at the same time, the release film 21 will also be peeled off from the right adhesive layer 23, and the right adhesive layer 23 remains adhered and fixed to the front section packaging film unit 7. In addition, the release film 21 remains adhered to the front section packaging film unit 7 through the lower adhesive layer 5; Refer to Figure 7, during the process of continuing to pull after the current packaging film unit 7 is straightened, the front packaging film unit 7 and the rear packaging film unit 8 will break at the first tear area 1. At the same time, the release film 21 will also break in half at the second tear area 6. One half is bonded to the rear packaging film unit 8 through the left adhesive layer 22, and the other half is bonded to the second half of the front packaging film unit 7 through the lower adhesive layer 5.

[0036] Refer to Figure 8 , the second tear area 6 is a long through hole 4 extending in the width direction of the packaging film unit, and the structure of the first tear area 1 is the same as that of the second tear area 6.

[0037] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A cotton packing film, comprising a plurality of packaging film units connected in sequence, and a first tear area (1) is provided between two adjacent packaging film units. Characterized in that: A connecting belt (2) is connected between two adjacent packaging film units. The connecting belt (2) includes a release film (21), a left adhesive layer (22) adhered to the rear packaging film unit (8), and a right adhesive layer (23) adhered to the front packaging film. The left adhesive layer (22) and the right adhesive layer (23) are located on the same side of the packaging film unit. One end of the release film (21) is adhered to the left adhesive layer (22). When the front packaging film unit (7) is bent and folded, the right adhesive layer (23) is pressed and adhered to the release film (21) at the other end. The left adhesive layer (22) and the right adhesive layer (23) are respectively located on the upper and lower sides of the release film (21); the first tear area (1) includes a plurality of through holes (3) linearly arranged along the width direction of the packaging film unit; on the other side of the release film (21) relative to the right adhesive layer (23), there is a lower adhesive layer (5) adhesively bonded to the front packaging film unit (7), and the release film (21) is provided with a second tear area (6).

2. The cotton packing film according to claim 1, Characterized in that: The hole pitch of the through holes (3) gradually decreases from the central position of the packaging film unit to the left and right sides in its width direction.

3. The cotton packing film according to claim 1, Characterized in that: The size of the through holes (3) gradually decreases from the central position of the packaging film unit to the left and right sides in its width direction.

4. The cotton packing film according to claim 1, Characterized in that: The first tear area (1) is a long strip-shaped through hole (4) extending along the width direction of the packaging film unit.

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