Packaging box convenient to recycle

Abstract

The invention relates to the field of packaging materials, and discloses a packaging box convenient to recycle, which comprises an outer paper shell and an inner film arranged in the outer paper shell, and the edge of the inner film is provided with a first adhesive part which is fixedly adhered to the outer paper shell. In one embodiment, the outer paper shell is provided with a punching line, and the punching line is located in an area defined by the first mucilage glue part and does not need to be linked with the edge of the inner film outer paper shell. And the inner film is also provided with a second adhesive part which surrounds the punching line and is adhered and fixed with the outer paper shell. In another embodiment, a covering is arranged outside the outer paper shell to cover the punching line, so that the inner film does not need to be provided with a second adhesive part. According to the packaging box, through the second mucilage glue part or the covering object corresponding to the punching line in the area defined by the first mucilage glue part, the outer paper shell around the punching line is in a bonded and fixed state, and the situation that water vapor intrudes into the outer paper shell through the punching line in the disinfection and refrigeration process, and consequently the outer paper shell is softened is effectively prevented; and the hardness of the outer paper shell is ensured, and the inner film and the outer paper shell can be easily separated for classified recovery.

Description

Technical Field

[0001] The invention relates to the field of packaging materials, in particular to a packaging box which is easy to recycle. Background Art

[0002] Packaging boxes, especially soft packaging boxes for beverages, refer to the packaging and decoration of beverages using appropriate materials, containers, processes, structural designs, etc., so as to maintain the quality of beverages or increase their commodity value during the processing, transportation, storage and sales of beverages.

[0003] There is an environmentally friendly packaging box in the public literature, including a packaging film and a packaging paper, the packaging film and the packaging paper are arranged to be directly face-to-face with each other, and the four edges of the packaging film are respectively bonded and fixed to the four edges of the packaging paper, wherein, in the part where the packaging paper is not bonded and fixed to the packaging film, the packaging paper and the packaging film are separated, and a number of tear lines set by perforated lines are cut on the packaging paper, the tear lines connect the four edges of the packaging film and the packaging paper, and the cavity between the packaging film and the packaging paper is connected to the cutting holes of the perforated lines. In the subsequent recycling process, it is torn from the tear line, so as to facilitate recycling. However, the current technology still has serious defects. For example, the packaging box needs to be immersed in disinfectant for five seconds before filling for disinfection. Although during this short soaking time, the disinfectant will enter the cavity through the cutting holes, which will cause the inside of the packaging paper to contact with the disinfectant, so that the packaging paper is soaked in the disinfectant and softened, affecting the hardness of the soft packaging box, resulting in an increase in defective products.

[0004] The technical problem to be solved by the present application is: how to prevent the disinfectant from entering the cavity between the outer paper shell and the inner film during the disinfection process, improve the stability of the quality of the soft packaging box, and continue to maintain the function of convenient recycling. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a packaging box that is easy to recycle, which can easily separate the outer paper shell from the inner film and prevent water vapor from entering the gap between the outer paper shell and the inner film.

[0006] The technical solution adopted in one embodiment of the present invention is: a packaging box that is easy to recycle, including an outer paper shell and an inner film embedded in the outer paper shell, the edge of the inner film is provided with a first adhesive portion, the first adhesive portion is bonded and fixed to the outer paper shell, the outer paper shell is provided with a perforated line, and the perforated line is located in the area surrounded by the first adhesive portion, the inner film is also provided with a second adhesive portion, the second adhesive portion surrounds the perforated line, and the second adhesive portion is bonded and fixed to the outer paper shell.

[0007] In another embodiment of the present invention, a covering is provided on the outside of the outer paper shell to cover the perforated lines, so the inner film does not need to be provided with a second adhesive portion.

[0008] The packaging box that is easy to recycle in the present application is provided with a first adhesive portion at the edge of the inner film, that is, only a small area or position of the inner film and the outer paper shell are in a bonding state, and most of the other areas are in a separated state, which is conducive to separating the inner film from the outer paper shell when the packaging box is recycled later, and reduces the amount of adhesive used, which is more environmentally friendly;

[0009] In order to facilitate the separation of the inner film from the outer paper shell, a perforation line is set on the outer paper shell. When recycling, the outer paper shell is torn along the perforation line to facilitate the subsequent separation of the inner film from the outer paper shell, thereby achieving classified recycling;

[0010] In addition, a second adhesive portion is provided around the perforated line so that the inner film is bonded to the inner wall of the outer paper shell around the perforated line, which can effectively prevent water vapor from entering the outer paper shell through the perforated line, thereby preventing the outer paper shell from being soaked and softened, thereby improving the yield rate of the packaging box.

[0011] In some embodiments, the second adhesive portion is arranged along the track of the perforated line, and the second adhesive portion covers the perforated line. Such an arrangement can reduce the contact area between the second adhesive portion and the inner wall of the outer paper shell, and reduce the difficulty of tearing the outer paper shell from the perforated line.

[0012] In some embodiments, the second adhesive portion is a closed circle, and the perforated line is arranged inside the circle. That is, the second adhesive portion is arranged outside the perforated line, and the adhesive does not directly cover the perforated line, which is convenient for tearing the outer paper shell, and can also limit the water vapor invading from the outside to the circle surrounded by the second adhesive portion, so that the water vapor intrusion is limited and does not affect the overall structure of the packaging box.

[0013] In some embodiments, the perforated lines extend from the top edge of the outer paper shell or adjacent to the top edge to the bottom edge or adjacent to the bottom edge. This arrangement allows the outer paper shell to be torn apart in a book-like manner through the perforated lines, and the outer paper shell and the inner film can be easily separated from the torn outer paper shell.

[0014] In some embodiments, the perforation line does not need to be connected to the edge of the outer paper shell. In this way, the length or shape of the perforation line can be arbitrarily designed, so that the outer paper shell can be torn more thoroughly, and the stress of the perforation line can be improved to prevent the packaging box from being compressed and directly ruptured along the perforation line during transportation.

[0015] In some embodiments, the perforated lines are arranged at any position of the outer paper shell, such as at a corner or a position adjacent to a corner. In this way, the outer paper shell can be torn apart along the perforated lines from the corners of the outer paper shell, and fingers can be inserted into the outer paper shell from the holes torn by the perforated lines to pinch the corners of the inner film, so that the inner film can be pinched with a smaller opening, which facilitates the separation of the inner film and the outer paper shell.

[0016] In some embodiments, the perforation line is disposed in the middle of the outer paper shell.

[0017] In some embodiments, in a manner that further reduces the amount of adhesive used, a covering is provided on the outside of the outer paper shell to cover the perforated line, so that the inner film does not need to be provided with a second adhesive portion.

[0018] In some embodiments, the covering is a sticker.

[0019] In some embodiments, the sticker causes the outer paper shell (10) to tear along the perforation line (11) when being removed.

[0020] In some embodiments, a box cover is further included, the box cover is connected to the outer paper shell, and the outer paper shell is provided with a through hole corresponding to the box cover.

[0021] In some embodiments, the inner film further comprises a third adhesive portion, the third adhesive portion surrounds the through hole, and the third adhesive portion is bonded and fixed to the outer paper shell. This plays a supporting role for the straw to be inserted through the through hole. The third adhesive portion can improve the strength of the inner film around the through hole, preventing the inner film around the through hole from falling off when sucking or pouring the beverage, thereby preventing the beverage from leaking between the inner film and the outer paper shell.

[0022] In some embodiments, the present invention further comprises a fourth adhesive portion, which may be in the shape of a square or other shapes, and is located in the middle of the inner film or distributed in the middle, mainly to keep the inner film and the outer paper folded into the shape of a box and to prevent the inner film from shifting or sliding.

[0023] In some embodiments, the outer paper shell and the inner film are rectangular after being unfolded, and a fold is provided on the outer paper shell. By providing the fold, the outer paper shell in the unfolded state can be easily folded into a box body.

[0024] The beneficial effects of the present invention are as follows: the recycling-friendly packaging box of the present application arranges a second adhesive portion corresponding to the perforated line on the inner film, so that the inner wall of the outer paper shell around the perforated line and the inner film are in a bonded and fixed state, effectively preventing water vapor from invading the interior of the outer paper shell through the perforated line during the disinfection process and the refrigeration process and causing the outer paper shell to soften, while ensuring the hardness of the outer paper shell, the inner film and the outer paper shell can be easily separated for classified recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural diagram of a packaging box that is easy to recycle according to the first embodiment of the present invention;

[0026] Figure 2 for Figure 1 A schematic structural diagram of a packaging box for easy recycling in a state of being torn open along a perforated line;

[0027] Figure 3 for Figure 1The schematic diagram of the structure of the outer paper shell and inner film of the packaging box which is easy to recycle is shown in the unfolded state;

[0028] Figure 4 for Figure 3 A schematic diagram of the structure of the outer paper shell in an unfolded state;

[0029] Figure 5 A schematic diagram of one structure of the perforated lines of a packaging box that is easy to recycle according to the present invention;

[0030] Figure 6 A schematic diagram of one structure of the perforated lines of a packaging box that is easy to recycle according to the present invention;

[0031] Figure 7 A schematic diagram of one structure of the perforated lines of a packaging box that is easy to recycle according to the present invention;

[0032] Figure 8 It is a structural schematic diagram of the outer paper shell and inner film of the packaging box for easy recycling in the second embodiment of the present invention in the unfolded state.

[0033] In the figure: 100, a packaging box that is easy to recycle; 10, an outer paper shell; 11, a perforation line; 12, a through hole; 13, a fold; 20, an inner film; 21, a first adhesive portion; 22, a separation portion; 23, a second adhesive portion; 24, a third adhesive portion; 30, a box cover. DETAILED DESCRIPTION

[0034] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. When the number of an element is referred to as "plurality", it may be any number of two or more. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0036] First embodiment:

[0037] See also Figure 1 and Figure 4, a packaging box 100 that is easy to recycle in a preferred embodiment of the present invention, including an outer paper shell 10 and an inner film 20 built into the outer paper shell 10, the inner film 20 includes a first adhesive portion 21 and a separation portion 22, the first adhesive portion 21 is arranged at the edge of the inner film 20, for example, the first adhesive portion can be continuous, intermittent, intricate, etc., and the edge width can be adjusted according to the packaging size requirements. The first adhesive portion 21 is bonded and fixed to the outer paper shell 10, and the first adhesive portion 21 surrounds the separation portion 22, the separation portion 22 is not bonded to the outer paper shell 10, and a perforated line 11 is arranged on the outer paper shell 10. The packaging box 100 that is easy to recycle in this application is provided with the first adhesive portion 21 at the edge of the inner film 20, that is, only a small part of the area of ​​the inner film 20 and the outer paper shell 10 is in a bonding state, and most of the other areas are in a separation state, which is conducive to separating the inner film 20 from the outer paper shell 10 when the packaging box is recycled later, and reduces the amount of adhesive, which is more environmentally friendly.

[0038] In order to facilitate the recycling and separation of the inner film 20 and the outer paper shell 10, a perforated line 11 is provided on the outer paper shell 10. When recycling, the outer paper shell 10 is torn along the perforated line 11 to facilitate the subsequent separation of the inner film 20 and the outer paper shell 10, thereby achieving classified recycling.

[0039] For example, the trajectory of the perforation line 11 can be made into any design or shape, such as, Figures 1 to 4 and Figure 8 For arc line display, the perforation line 11 is set as an arc line, so that the edge of the outer paper shell 10 is relatively smooth when it is torn along the perforation line 11, avoiding scratching the operator when extracting the inner film 20. It should be noted that the trajectory of the perforation line 11 is not limited to the curve or the shape shown in the attached figure. The trajectory of the perforation line 11 can be adaptively designed according to the actual situation of the shape and structure of the packaging box, and it only needs to meet the purpose of conveniently tearing the outer paper shell 10 and extracting the inner film 20 from the inner part of the outer paper shell 10.

[0040] like Figure 1 As shown, the perforated line 11 is arranged in the middle of the outer paper shell 10, and the perforated line 11 is arc-shaped. Since the inner film is in a taut state when the outer paper shell 10 is upright, when separating the outer paper shell 10 from the inner film 20, in order to facilitate pinching the inner film 20, Figure 1In the case of the shape of the perforated line 11 shown, the outer paper shell 10 should be compressed in the height direction to make the inner film 20 wrinkled for easy pinching. In some embodiments, when the perforated line 11 is set in the middle of the outer paper shell 10, the perforated line 11 is set in the middle and lower part of the outer paper shell 10. Since the upper half of the package box is in a hollow state after a portion of the beverage is poured out, at this time, grasping the middle and upper part of the package box will cause the middle and upper part of the package box to be easily deformed. If the perforated line 11 is set in the middle and upper part of the outer paper shell 10, after pouring out a portion of the beverage, it may cause the outer paper shell 10 to crack and break at the perforated line 11 when grasping the middle and upper part of the outer paper shell 10, affecting the pouring of the beverage.

[0041] like Figure 6 and Figure 7 As shown, it is another schematic diagram of the structure of the perforated line 11, and the perforated line 11 is arranged at the corner or adjacent to the corner of the outer paper shell 10. In this way, the outer paper shell 10 can be torn from the corner along the perforated line 11, and fingers can be inserted into the outer paper shell 10 from the torn hole of the perforated line 11 to pinch the corner of the inner film 20, and the inner film 20 can be pinched with a smaller opening to pull out the inner film 20.

[0042] During the disinfection process of the packaging box and when it is refrigerated in the refrigerator, there is a possibility that water vapor will enter the outer paper shell 10 through the holes of the perforated line 11. When water vapor invades the outer paper shell 10, the outer paper shell 10 will soften due to moisture. In severe cases, the outer paper shell 10 will be damaged, which seriously affects the performance of the packaging box. In this regard, in order to prevent water from entering the perforated line 11, the inner film 20 of the present application also includes a second adhesive portion 23, the second adhesive portion 23 surrounds the perforated line 11, and the second adhesive portion 23 is bonded and fixed to the outer paper shell 10. The second adhesive portion 23 is arranged around the perforated line 11, so that the inner film 20 is in a bonded state with the inner wall of the outer paper shell 10 around the perforated line 11, which can effectively prevent water vapor from entering the outer paper shell 10 through the perforated line 11, thereby preventing the outer paper shell 10 from being soaked and softened, and improving the yield rate of the packaging box.

[0043] Below Figure 1 The structure of the perforated line 11 shown is used as an example to introduce the second adhesive portion 23. The second adhesive portion 23 is arranged along the trajectory of the perforated line 11, and the second adhesive portion 23 covers the perforated line 11. This arrangement can reduce the contact area between the second adhesive portion 23 and the inner wall of the outer paper shell 10, and reduce the difficulty of tearing the outer paper shell 10 from the perforated line 11.

[0044] See also Figure 3 and Figure 4 The outer paper shell 10 and the inner film 20 are unfolded to be rectangular, and a fold 13 is provided on the outer paper shell 10. By providing the fold 13, the outer paper shell 10 in the unfolded state can be easily folded into a box body.

[0045] In order to prevent the perforated lines 11 from affecting the appearance of the packaging box, a pattern may be provided on the outer surface of the outer paper shell 10, and then the perforated lines 11 may be provided along the contour of the pattern, so that the perforated lines 11 may be visually hidden, thereby improving the aesthetic appearance of the packaging box.

[0046] Optionally, the width of the first adhesive portion 21 is 5 mm to 30 mm. The adhesive can be fully covered or indirectly, or arranged in a matrix, etc. The first adhesive portion 21 should save the amount of adhesive used as much as possible while bonding the inner film 20 of the packaging to the outer paper shell 10, and should also be considered to facilitate the separation of the inner film 20 from the outer paper shell 10 at a later time, so as to facilitate classification and recycling. Preferably, the width of the first adhesive portion 21 close to the top of the outer paper shell 10 is greater than the width of other portions. Since the first adhesive portion 21 close to the top of the outer paper shell 10 also needs to withstand the gravity after filling the beverage, increasing the width of the first adhesive portion 21 here is conducive to improving the strength of the inner film 20 and preventing the inner film 20 from falling off after filling the beverage.

[0047] In this embodiment, the packaging box 100 that is easy to recycle further includes a box cover 30, which is connected to the outer paper shell 10, and the outer paper shell 10 is provided with a through hole 12 corresponding to the box cover 30. Correspondingly, the inner film 20 further includes a third adhesive portion 24, which surrounds the through hole 12, and the third adhesive portion 24 is bonded and fixed to the outer paper shell 10. By providing the third adhesive portion 24, the strength of the inner film 20 around the through hole 12 can be improved to prevent the inner film 20 around the through hole 12 from falling off when sucking or pouring the beverage, causing the beverage to leak between the inner film 20 and the outer paper shell 10. In one embodiment, the through hole 12 is a channel for the user to insert a straw, so the third adhesive portion 24 can further maintain the support of the through hole 12. In another embodiment, within the range of the third adhesive portion 24 or the through hole 12, at the corresponding position of the inner film, a colored glue of a shape, such as an isosceles right triangle, is applied. It is convenient to observe the punching holes on the outer paper shell to quickly check whether the inner film is aligned with the outer paper shell during the production process without stopping the machine for inspection, which greatly improves production efficiency. Optionally, the width of the third adhesive portion 24 is 10 mm to 20 mm.

[0048] The inner film 20 includes a PE layer, an aluminum foil layer and a PET layer which are compounded in sequence from the inside to the outside, and the PET layer and the outer paper shell 10 are directly face-to-face with each other. Preferably, the thickness of the PE layer is 5-15 μm, the thickness of the aluminum foil layer is 6-9 μm, and the thickness of the PET layer is 10-18 μm. The PE layer is an extruded low-density polyethylene layer, which is in direct contact with the beverage and has adaptability, permeability resistance, good heat sealing properties, etc.; the aluminum foil layer mainly plays the role of barrier and light protection to prevent the beverage from being affected by ultraviolet rays in the light; the PET layer is a polyethylene terephthalate layer, which has low gas and water vapor permeability, excellent gas, water, oil and odor barrier properties, and good temperature resistance.

[0049] As a further improvement, the inner film 20 further includes a PA layer, which is compounded between the aluminum foil layer and the PET layer, and the thickness of the PA layer is 12 to 16 μm. The PA layer is also a nylon layer, which can enhance the toughness of the inner film 20 and reduce the problem of the inner film 20 being broken due to external impact.

[0050] In the actual production process, since the beverages packaged in the packaging box need to be placed in a humid refrigerated environment, the side of the outer paper shell 10 away from the inner film 20 is coated with a transparent waterproof coating, and the waterproof coating covers the surface of the outer paper shell to achieve a waterproof effect.

[0051] The present application provides a first adhesive portion 21, a second adhesive portion 23 and a third adhesive portion 24 on the inner film 20, and uses a glue coating and laminating device to coat the inner film 20 with the outer paper shell 10 at one time, and then folds it into a packaging box, without adding any additional steps. Under the premise that the production cost remains basically unchanged, the inner film 20 and the outer paper shell 10 can be easily separated for classified recycling while ensuring the hardness of the outer paper shell 10. Second embodiment:

[0052] See also Figure 8 , is a packaging box 100 that is easy to recycle according to the second embodiment of the present invention. This embodiment is similar to the first embodiment, except that the structure of the second adhesive portion 23 in this embodiment is different. The second adhesive portion 23 is a closed circle, and the perforated line 11 is arranged in the circle. The outer paper shell 10 and the inner film 20 in the circle surrounded by the second adhesive portion 23 are not adhered, and the second adhesive portion 23 is arranged on the periphery of the perforated line 11. The adhesive will not directly cover the perforated line 11, which is convenient for tearing the outer paper shell 10, and can also limit the water vapor invading from the outside to the circle surrounded by the second adhesive portion 23, so that the water vapor intrusion is limited and will not affect the overall structure of the packaging box.

[0053] Finally, it should be noted that the above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A packaging box (100) that is easy to recycle, comprising an outer paper shell (10) and an inner film (20) built into the outer paper shell (10), wherein the edge of the inner film (20) is provided with a first adhesive portion (21), the first adhesive portion (21) is bonded and fixed to the outer paper shell (10), and the outer paper shell (10) is provided with a perforated line (11), and the perforated line (11) is located in an area surrounded by the first adhesive portion (21), characterized in that: The perforated line (11) is not connected to the edge of the inner film (20), and the inner film (20) is also provided with a second adhesive portion (23), the second adhesive portion (23) surrounds the perforated line (11), and the second adhesive portion (23) is bonded and fixed to the outer paper shell (10).

2. The packaging box (100) that is easy to recycle according to claim 1, characterized in that: The second adhesive portion (23) is arranged along the trajectory of the perforated line (11), and the second adhesive portion (23) covers the perforated line (11).

3. The packaging box (100) that is easy to recycle according to claim 1, characterized in that: The second adhesive portion (23) is a closed loop, and the perforated line (11) is arranged inside the loop.

4. The packaging box (100) that is easy to recycle according to claim 1, characterized in that: The perforated line (11) is arranged in the middle of the outer paper shell (10).

5. The packaging box (100) that is easy to recycle according to claim 1, characterized in that: It also comprises a box cover (30), wherein the box cover (30) is connected to the outer paper shell (10), and the outer paper shell (10) is provided with a through hole (12) corresponding to the box cover (30).

6. The packaging box (100) convenient for recycling according to claim 1, characterized in that: The inner film (20) further comprises a third adhesive portion (24), wherein the third adhesive portion (24) surrounds the through hole (12), and the third adhesive portion (24) is bonded and fixed to the outer paper shell (10).

7. The packaging box (100) convenient for recycling according to claim 1, characterized in that: The outer paper shell (10) and the inner film (20) are rectangular when unfolded, and a fold (13) is provided on the outer paper shell (10).

8. A packaging box (100) that is easy to recycle, comprising an outer paper shell (10) and an inner film (20) built into the outer paper shell (10), wherein the edge of the inner film (20) is provided with a first adhesive portion (21), the first adhesive portion (21) is bonded and fixed to the outer paper shell (10), the outer paper shell (10) is provided with a perforated line (11), and the outer paper shell (10) is provided with a covering (xx) around the perforated line (11) to cover the perforated line (11).

9. The packaging box (100) convenient for recycling according to claim 8, characterized in that: This cover includes stickers.

10. The packaging box (100) convenient for recycling according to claim 9, characterized in that: The sticker causes the outer paper shell (10) to tear along the perforation line (11) when being removed.

11. The packaging box (100) convenient for recycling according to claim 8, characterized in that: The perforated line (11) is arranged in the middle of the outer paper shell (10).

12. The packaging box (100) convenient for recycling according to claim 8, characterized in that: It also comprises a box cover (30), wherein the box cover (30) is connected to the outer paper shell (10), and the outer paper shell (10) is provided with a through hole (12) corresponding to the box cover (30).

13. The packaging box (100) convenient for recycling according to claim 8, characterized in that: The inner film (20) further comprises a third adhesive portion (24), wherein the third adhesive portion (24) surrounds the through hole (12), and the third adhesive portion (24) is bonded and fixed to the outer paper shell (10).

14. The packaging box (100) convenient for recycling according to claim 8, characterized in that: The outer paper shell (10) and the inner film (20) are rectangular when unfolded, and a fold (13) is provided on the outer paper shell (10).

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