Carton with protection function

Abstract

The utility model belongs to the technical field of packaging cartons, and particularly discloses a carton with a protection function, which comprises four base plates fixedly connected end to end, the four base plates comprise a front side base plate, a rear side base plate, a left side base plate and a right side base plate, the front side base plate, the right side base plate, the rear side base plate and the left side base plate are sequentially and fixedly connected end to end, and the front side base plate is fixedly connected with the right side base plate. A cuboid-shaped structure is formed by enclosing; first polystyrene foam layers are arranged on the inner surfaces of the at least two base plates respectively. According to the carton with the protection function, the first polystyrene foam layer is directly compounded on the surface of the base plate, the product structure and the manufacturing process are simplified, cost is reduced, the first polystyrene foam layer is adopted and can be tightly attached to the base plate, the stripping phenomenon between the polystyrene foam layer and the base plate is avoided, and therefore the durability of the carton is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the paper box technical field, especially a paper box with protection function. BACKGROUND

[0002] In the freight transport, warehouse management and logistics distribution links, paper packaging box is widely used as a basic bearing unit. The traditional corrugated box mainly adopts single or double layer corrugated structure, and its base material is mainly ordinary kraft paper. In practical application, there are technical bottlenecks such as insufficient mechanical properties and weak environmental adaptability. With the breakthrough of new composite material research, composite reinforcement technology has been applied in the packaging field, that is, a high molecular protective layer is compounded on the surface of the paper box base body to enhance the overall compression strength of the box body and improve the structural stability during transportation.

[0003] The high molecular protective layer is compounded on the surface of the paper box base body, and the interface combination is usually realized by the way of adhesive tape or liquid adhesive coating. The specific process includes base material pretreatment, adhesive layer coating, protective layer lamination, pressure curing and other links. Each process needs special equipment investment and manual operation. Because the adhesive compounding method increases the cost of consumables such as adhesive, and also prolongs the production rhythm due to the curing time requirement, the overall assembly cost is significantly improved. In addition, the uniformity of adhesive coating is difficult to accurately control, which may cause local insufficient adhesion strength. The adhesive layer is easy to age and become brittle in a humid environment, which causes the interface peeling between the protective layer and the corrugated board base body, seriously affecting the sealing performance and durability of the composite material. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a paper box with protection function to solve the problems of high cost, complex assembly process and poor durability of paper box caused by the adhesion of protective layer on the paper box base body in the prior art.

[0005] To achieve the above technical purposes and effects, the utility model realizes the following technical scheme:

[0006] A paper box with protection function, comprising four base plates fixedly connected at the head and tail, four base plates including front side base plate, rear side base plate, left side base plate and right side base plate, the front side base plate, the right side base plate, the rear side base plate and the left side base plate are fixedly connected at the head and tail in turn to form a cuboid structure.

[0007] At least two inner surfaces of the base plates are respectively provided with a foamed adhesive layer.

[0008] Further, the material of the foamed adhesive layer is antistatic foamed adhesive.

[0009] Further, the foamed adhesive layer one comprises a plurality of load-bearing sub-zones, which comprise side load-bearing zones, a middle load-bearing zone, a top load-bearing zone and a bottom load-bearing zone.

[0010] The side load-bearing zones are provided in two, and the middle load-bearing zone is arranged between the two side load-bearing zones, and the two side load-bearing zones are located between the top load-bearing zone and the bottom load-bearing zone.

[0011] Further, the thickness of the side load-bearing zone is greater than that of the middle load-bearing zone.

[0012] Further, the thickness of the top load-bearing zone and the bottom load-bearing zone is greater than that of the middle load-bearing zone.

[0013] Further, the outside of the side load-bearing zone is further provided with an extension reinforcing belt.

[0014] Further, the thickness of the extension reinforcing belt decreases from top to bottom along the height direction of the extension reinforcing belt.

[0015] Further, the front side substrate, the rear side substrate, the left side substrate and the right side substrate are all provided with cover plates.

[0016] Further, the left side substrate is provided with a fold line indentation connection area one at an end away from the rear side substrate.

[0017] The front side substrate is provided with a fold line indentation connection area two at an end away from the right side substrate.

[0018] The fold line indentation connection area two is provided with metal nails, and the fold line indentation connection area two and the fold line indentation connection area one are connected and fixed through the metal nails.

[0019] Further, the fold line indentation connection area one is further provided with a foamed adhesive layer two.

[0020] Compared with the prior art, the paper box with the protective function has the beneficial effects that:

[0021] In the utility model, the foamed adhesive layer one is directly compounded on the surface of the substrate, the product structure and the process are simplified, and the cost is reduced. The foamed adhesive layer one can be closely attached to the substrate, and the peeling phenomenon between the adhesive layer and the substrate is avoided, so that the durability of the paper box is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the utility model and constitute a part of the application. The schematic embodiments of the utility model and the description thereof are used to explain the utility model, and do not constitute an improper limitation on the utility model. In the drawings:

[0023] Figure 1 It is the structure schematic view of the paper box with the protective function provided by the utility model.

[0024] Figure 2 The utility model discloses Figure 1 The structure expansion view of paper box with protection function.

[0025] Among them, the sign is: 1, front side substrate, 2, rear side substrate, 3, left side substrate, 4, right side substrate, 5, foamed adhesive layer one, 6, extension reinforcing belt, 7, foamed adhesive layer two, 11, crease mark connection area two, 31, crease mark connection area one. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0027] In the description of the utility model, it is understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery" and the like indicate the orientation or positional relationship, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the indicated components or elements must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model.

[0028] In the links of goods transportation, warehouse management and logistics distribution, paper packaging boxes are widely used as basic bearing units. The traditional corrugated paper box mainly adopts single-layer or double-layer corrugated structure, and the base material mainly uses ordinary kraft paper. In actual application, there are technical bottlenecks such as insufficient mechanical properties and weak environmental adaptability. With the breakthrough of research and development of new composite materials, composite reinforcement technology has been applied in the packaging field, that is, by compounding a high molecular protective layer on the surface of the paper box base body, the overall compression strength of the box body is enhanced, and the structural stability in the transportation process is improved.

[0029] In the surface of the carton base composite polymer protective layer, usually using adhesive tape or liquid adhesive coating to achieve interface bonding. The specific process includes substrate pretreatment, adhesive coating, protective layer lamination, pressure curing and other links, each process needs special equipment investment and manual operation. Because of the bonding composite way not only increases the adhesive and other consumable costs, but also because of the curing time requirement leads to the production rhythm extension, significantly improves the overall assembly cost; in addition, the adhesive coating uniformity is difficult to accurately control, may cause local bonding strength insufficient; and the adhesive layer is easy to be aged and brittle in the hot and humid environment, leading to the interface peeling between the protective layer and the corrugated board base, which seriously affects the sealing performance and durability of the composite material.

[0030] More specifically, in the prior art, the surface of the carton base composite polymer protective layer, the defects of using adhesive tape or liquid adhesive coating to achieve interface bonding are as follows:

[0031] First, it is necessary to use adhesive tape or adhesive to bond the protective layer (such as bubble film) with the paperboard: the protective layer cannot be directly fixed with the base plate, and the base plate and the protective layer need to be fixed together by coating adhesive or pasting adhesive tape, which increases the assembly process and cost;

[0032] Second, the degree of automation is low: the cutting and fixing process of the protective layer (such as bubble film) in a specific area is difficult to realize automatic production;

[0033] Third, the protective effect of the carton is affected: the above scheme will damage the local bubbles of the bubble bag during the paperboard forming carton process, and the metal nails and crease indentation process will affect the protective effect of the carton; during the transportation of the carton, the edge area is an area with high bearing requirement, and it is difficult to strengthen the protection of the bubble film in the weak area;

[0034] Fourth, the bubble film of the above scheme needs to be cut into a specific shape, which is wasted;

[0035] Fifth, the above scheme must fix the bubble film protective layer before the paperboard crease indentation, and it is difficult to assemble the protective layer after assembling the carton, and the bubble film is difficult to be tightly fixed at the crease of the carton, which affects the protective effect;

[0036] Sixth, it cannot meet the environmental protection requirements: the bubble bag is generally made of PE material, which is a non-degradable material;

[0037] Seventh, there is no anti-static function: the bubble bag of the above scheme is made of PE material, which is easy to accumulate static electricity during transportation, and the consumer will be shocked after unpacking, and the dust caused by static electricity will pollute the product and affect the appearance of the product.

[0038] Based on this, the utility model provides a carton with protection function, according to the bearing demand of different area of carton, the paperboard with gradient protection function is directly formed to the antistatic foamed glue of different thickness on the substrate, greatly simplify the structure of the paperboard with protection function, simultaneously, this technical scheme simple structure, easy to assemble and realize.

[0039] As Figures 1 to 2 The utility model provides a carton with protection function, including four first and last fixed connection's substrate, four substrate includes front side substrate 1, rear side substrate 2, left side substrate 3 and right side substrate 4, front side substrate 1, right side substrate 4, rear side substrate 2, left side substrate 3 are fixed connection in proper order first and last, and enclose and form cuboid structure;

[0040] The inner surface of at least two substrates is respectively provided with a foamed glue layer 5.

[0041] In the utility model, the carton is surrounded by the front side substrate 1, the right side substrate 4, the rear side substrate 2 and the left side substrate 3. Specifically, in the cuboid structure formed by enclosing, the front side substrate 1 and the rear side substrate 2 are arranged in parallel, and the left side substrate 3 and the right side substrate 4 are arranged in parallel.

[0042] More specifically, the front side substrate 1, the right side substrate 4, the rear side substrate 2 and the left side substrate 3 are fixedly connected in proper order, and the fixed connection can be achieved by one-piece molding, which connects the front side substrate 1, the right side substrate 4, the rear side substrate 2 and the left side substrate 3 in proper order.

[0043] The inner surface of at least two substrates is respectively provided with a foamed glue layer 5, which means that the inner surface of at least two substrates among the four substrates is coated with a foamed glue layer 5.

[0044] Since the foamed glue is coated on the substrate, the foamed glue can be cured in situ to directly form a paperboard with protection function, without the need for additional adhesive or tape to fix the foamed glue layer 5 and the substrate.

[0045] As Figures 1 to 2 In some embodiments of the utility model, the inner surface of two substrates among the four substrates is provided with a foamed glue layer 5, and the two substrates are arranged in parallel, and the other two substrates are not provided with a foamed glue layer 5.

[0046] Specifically, there are two cases:

[0047] First, among the four substrates, the front side substrate 1 and the rear side substrate 2 arranged in parallel can be provided with a foamed glue layer 5, and the left side substrate 3 and the right side substrate 4 arranged in parallel are not provided with a foamed glue layer 5.

[0048] Secondly, the left side substrate 3 and the right side substrate 4 which are parallelly arranged among the four substrates can be provided with the foamed adhesive layer one 5, and the front side substrate 1 and the back side substrate 2 which are parallelly arranged are not provided with the foamed adhesive layer one 5;

[0049] In this way, targeted protection can be realized, cost can be reduced, and since the protective layer is arranged only in part of the area, the process flow is simplified, thereby shortening the production cycle and being suitable for batch manufacturing; in addition, the overall weight of the carton can be reduced, the substrate not provided with the protective layer retains the substrate characteristics, stress concentration is avoided, and precise protection is realized.

[0050] As shown in Figures 1 to 2 some embodiments of the present application, the foamed adhesive layer one 5 is made of anti-static foamed adhesive, specifically, the anti-static foamed adhesive is composed of foamed adhesive and anti-static agent; the foamed adhesive can be any one or more of 100% bio-based foamed adhesive, polyurethane foamed adhesive, polystyrene foamed adhesive mixed in any proportion;

[0051] The anti-static agent can be any one or more of cationic anti-static agent, anionic anti-static agent, non-ionic anti-static agent mixed in any proportion;

[0052] The surface resistivity of the anti-static foamed adhesive is < 1010Ω, the density is ≤0.3g / cm 3 , the Shore A hardness is 20-85, the foaming ratio is ≥5, the adhesion strength to the paper substrate is paper substrate failure, and the compression rebound stress at 10% strain is 0.2-1.5MPa;

[0053] The use of 100% bio-based foamed adhesive can meet the environmental protection requirements;

[0054] Therefore, by adding an anti-static agent to the foamed adhesive, the foamed adhesive has anti-static function and does not accumulate static electricity, so that the consumer will not be shocked after unpacking the carton, and the product appearance will not be affected by the dust pollution caused by static electricity.

[0055] As shown in Figures 1 to 2 some embodiments of the present application, the foamed adhesive layer one 5 includes a plurality of load-bearing partitions, and the plurality of load-bearing partitions includes side load-bearing areas, middle load-bearing areas, top load-bearing areas and bottom load-bearing areas;

[0056] The side load-bearing areas are provided with two, the middle load-bearing areas are arranged between the two side load-bearing areas, and the two side load-bearing areas are located between the top load-bearing areas and the bottom load-bearing areas;

[0057] Therefore, the foamed adhesive layer one 5 is arranged on the carton, and the foamed adhesive layer one 5 is divided into a plurality of load-bearing partitions, and the thickness of the plurality of load-bearing partitions can be the same or different, so that the thickness of the plurality of load-bearing partitions can be adjusted according to the load-bearing requirements of different areas of the carton.

[0058] As Figures 1 to 2 shown, in some embodiments of the present application, the thickness of the side load-bearing area is greater than the thickness of the middle load-bearing area;

[0059] The thickness of the top load-bearing area and the thickness of the bottom load-bearing area are both greater than the thickness of the middle load-bearing area;

[0060] Based on this, since the foamed adhesive layer 5 is provided on the carton, and the foamed adhesive layer 5 is divided into multiple load-bearing subareas, that is, according to the load-bearing requirements of different areas of the carton, the thickness of the multiple load-bearing subareas is adjusted, specifically, the foamed adhesive in the edge area of the carton is thicker, and the planar area is thinner, that is, it is embodied as "the thickness of the side load-bearing area is greater than the thickness of the middle load-bearing area, and the thickness of the top load-bearing area and the thickness of the bottom load-bearing area are both greater than the thickness of the middle load-bearing area", thereby the protection effect can be improved, and the material utilization rate is maximized.

[0061] As Figures 1 to 2 shown, in some embodiments of the present application, the outside of the side load-bearing area is further provided with an extension reinforcing belt 6;

[0062] One end of the extension reinforcing belt 6 away from the side load-bearing area can be lapped to the adjacent base plate, for example, if the foamed adhesive layer 5 is provided on the right side base plate 4, then the two side load-bearing areas on the foamed adhesive layer 5 are both provided with the extension reinforcing belt 6 outside, specifically, the left extension reinforcing belt 6 and the right extension reinforcing belt 6, one end of the left extension reinforcing belt 6 away from the side load-bearing area is lapped to the front side base plate 1, and one end of the right extension reinforcing belt 6 away from the side load-bearing area is lapped to the rear side base plate 2;

[0063] The base plate provided with the foamed adhesive layer 5 is provided with the extension reinforcing belt 6 at both ends, the extension reinforcing belt 6 extends to the adjacent base plate of the base plate, and the protection effect of the connection between the base plate and its adjacent base plate can be improved.

[0064] As Figures 1 to 2 shown, in some embodiments of the present application, the thickness of the extension reinforcing belt 6 decreases from top to bottom along the height direction of the extension reinforcing belt 6;

[0065] Since in actual use, for optimizing space usage, generally a plurality of box bodies are stacked for storage, the top of the carton bears external load, and the stress concentration is more significant, by setting the extending reinforcing belt 6, and the thickness of the extending reinforcing belt 6 decreases from top to bottom along the height direction of the extending reinforcing belt 6, that is, the thickness of the extending reinforcing belt 6 decreases from top to bottom along the height direction of the carton, the deformation resistance of the high stress area can be targetedly enhanced, and local failure is avoided; as the height decreases, the stress borne by the box body gradually decreases, therefore, thinning the extending reinforcing belt 6 can avoid material redundancy, realize lightweight design, while ensuring the continuity of the overall rigidity, and reduce the fatigue risk caused by stress mutation;

[0066] Meanwhile, by adopting the thickness gradient, thermal stress concentration caused by cross-section mutation can be avoided, and the warping probability is reduced.

[0067] As shown in the drawings, Figures 1 to 2 In some embodiments of the present application, the top of the front side substrate 1, the rear side substrate 2, the left side substrate 3 and the right side substrate 4 is provided with a cover plate.

[0068] When the substrate is assembled into a packaging box, the cover plate at the top is mainly used for facilitating the packaging operation and sealing operation of the carton.

[0069] As shown in the drawings, Figures 1 to 2 In some embodiments of the present application, the cover plate on the substrate provided with the foamed adhesive layer one 5 can also be coated with a foamed adhesive layer, and the material of the foamed adhesive layer is the same as that of the foamed adhesive layer one 5.

[0070] As shown in the drawings, Figures 1 to 2 In some embodiments of the present application, the bottom of the front side substrate 1, the rear side substrate 2, the left side substrate 3 and the right side substrate 4 is provided with a bottom plate.

[0071] When the substrate is assembled into a packaging box, the bottom bearing plate bears the core function of supporting the box structure and dispersing load pressure; and ensures the overall stability of the box structure.

[0072] As shown in the drawings, Figures 1 to 2 In some embodiments of the present application, the bottom plate on the substrate provided with the foamed adhesive layer one 5 can also be coated with a foamed adhesive layer, and the material of the foamed adhesive layer is the same as that of the foamed adhesive layer one 5.

[0073] As shown in the drawings, Figures 1 to 2 In some embodiments of the present application, the left side substrate 3 is integrally formed with a fold line indentation connection area one 31 at one end away from the rear side substrate 2.

[0074] The front side substrate 1 is integrally formed with a fold line indentation connection area two 11 at one end away from the right side substrate 4.

[0075] The fold line indentation connecting area two 11 is provided with a metal nail, and the fold line indentation connecting area two 11 and the fold line indentation connecting area one 31 are connected and fixed through the metal nail;

[0076] The metal nail is connected and fixed, compared with an adhesive or a plastic fastener, the metal nail is not prone to aging, embrittlement or corrosion (especially stainless steel material) in long-term use, is suitable for harsh environments (such as high humidity and large temperature difference), and can avoid separation or deformation of the connecting part due to external force;

[0077] In addition, the fold line indentation predefines the folding axis of the structure, ensures the geometric alignment of the connecting area, and the metal nail further locks the relative position to prevent the indentation area from being offset or misaligned during repeated folding / unfolding;

[0078] The arrangement can also effectively improve the assembly efficiency.

[0079] As shown in the drawings, Figures 1 to 2 Figures 1 to 2 In some embodiments of the utility model, a foamed adhesive layer two 7 is further arranged on the fold line indentation connecting area one 31.

[0080] The foamed adhesive layer two 7 is coated on the fold line indentation connecting area one 31, and the coating method can adopt pneumatic dispensing, screw valve dispensing or jet valve dispensing.

[0081] The arrangement avoids damage of the carton caused by friction at the connecting part, can prolong the recycling times of the carton, and effectively prolongs the service life of the carton. In addition, the arrangement can also enhance the load-bearing capacity of the side part of the carton, significantly improve the deformation resistance, and further enhance the stability of the stacking.

[0082] The utility model provides a carton with a protection function, and the assembly process is as follows:

[0083] S1, the paperboard is cut and connected through the fold line indentation to form four sequentially connected baseboards, and the fold line indentation connecting area one 31 is arranged at one end of the left baseboard 3 away from the rear baseboard 2, and the fold line indentation connecting area two 11 is arranged at one end of the front baseboard 1 away from the right baseboard 4 for standby;

[0084] S2, the fold line indentation connecting area one 31 and the fold line indentation connecting area two 11 are connected and fixed through the binding metal nail;

[0085] S3, according to the load-bearing requirement of different regions of the carton, the foamed adhesive of different thicknesses is coated for standby;

[0086] S4, after the foamed adhesive is solidified, the foamed adhesive layer one 5 is formed, and a carton with a protection function is prepared.

[0087] In the assembly process, the foamed adhesive can also be coated on the baseboard first, and then the fold line indentation and the binding metal nail process is carried out, so that the time for waiting for the foamed adhesive to solidify is saved.

[0088] The foaming adhesive can be applied by a pneumatic dispensing, a screw valve dispensing or a jet valve dispensing.

[0089] The paper box with the protection function has the following advantages:

[0090] First, the product structure and process are simplified, and the cost is reduced: the paperboard structure with the protection function is simplified from the substrate + fixed layer + bubble film to the substrate + foaming adhesive, and the paperboard assembly process is changed from bubble film cutting, setting a fixed layer on the substrate, and attaching the bubble film on the substrate with the fixed layer to directly applying the foaming adhesive on the substrate.

[0091] Second, the production automation degree is high: without the bubble film cutting and the bubble film fixing process in a specific area, only the foaming adhesive application process, automatic production can be easily realized.

[0092] Third, the strict environmental protection regulations can be met: without the PE material bubble film, the foaming adhesive applied on the substrate can be set as a bio-based foaming adhesive.

[0093] Fourth, the protection performance is good: the foaming adhesive protection layer can be directly applied in the paper box after the paper box is formed, which can completely eliminate the damage of the binding metal nails and the folding line indentation process to the protection layer; the antistatic agent can be added to the foaming adhesive to meet the anti-static function.

[0094] Fifth, there is no material waste: the foaming adhesive can be applied in any shape and any thickness to meet various customized needs.

[0095] Sixth, the gradient protection layer can be set according to the bearing requirement of different areas in the actual application process of the paper box packaging product, the protection effect is improved, and the material utilization rate is maximized.

[0096] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0097] The basic principle, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A carton having a protective function, characterized in that The application relates to a four-plate fixed connection base plate, which comprises a front plate (1), a rear plate (2), a left plate (3) and a right plate (4) fixedly connected in sequence. At least two inner surfaces of the plates are respectively provided with a foamed adhesive layer (5).

2. A carton having a protective function according to claim 1, characterised in that, The foamed adhesive layer (5) is made of anti-static foamed adhesive.

3. The carton of claim 1, wherein, The foamed adhesive layer (5) comprises a plurality of load-bearing subareas, including side load-bearing areas, middle load-bearing areas, top load-bearing areas and bottom load-bearing areas. The side load-bearing areas are provided with two middle load-bearing areas arranged between the two side load-bearing areas, and the two side load-bearing areas are arranged between the top load-bearing area and the bottom load-bearing area.

4. A carton having a protective function according to claim 3, characterised in that, The thickness of the side load-bearing area is greater than that of the middle load-bearing area.

5. The carton of claim 3, wherein, The thickness of the top load-bearing area and the bottom load-bearing area is greater than that of the middle load-bearing area.

6. A carton having a protective function according to claim 3, wherein The outer part of the side load-bearing area is further provided with an extension reinforcing belt (6).

7. A carton having a protective function according to claim 6, characterised in that, The thickness of the extension reinforcing belt (6) decreases from top to bottom along the height direction of the extension reinforcing belt (6).

8. The carton of claim 1 having a security feature. The front plate (1), the rear plate (2), the left plate (3) and the right plate (4) are all provided with cover plates.

9. The carton of claim 1 having a security feature. One end of the left plate (3) away from the rear plate (2) is provided with a fold line indentation connection area (31). One end of the front plate (1) away from the right plate (4) is provided with a fold line indentation connection area (11). The fold line indentation connection area (11) is provided with a metal nail, and the fold line indentation connection area (11) and the fold line indentation connection area (31) are connected and fixed through the metal nail.

10. A carton having a security feature according to claim 9, wherein The fold line indentation connection area (31) is further provided with a foamed adhesive layer (7).

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