Electromagnetic shielded shipping carton

Abstract

The utility model relates to an electromagnetic shielding type transportation carton, including carton body, the top extension of carton body has the box cover, carton body, box cover are the composite structure, including substrate layer, the substrate layer is distributed with wave absorbing layer, wave absorbing layer is distributed with conducting layer, the inside side angle of carton body all pastes electromagnetic shielding strip, and electromagnetic shielding strip mutual conduction connects, constitutes electromagnetic shielding frame, electromagnetic shielding frame links to each other with conducting layer, substrate layer is corrugated paperboard, and its surface has the fire -retardant coating that coats, wave absorbing layer is silicon rubber composite layer, and silicon rubber composite layer fills up with a plurality of magnetic wave absorbing particles, conducting layer is aluminized carbon fibre braided net, and conducting layer links to each other with wave absorbing layer through hot melt adhesive, electromagnetic shielding strip is galvanized iron strip, and electromagnetic shielding strip links to each other with the inside side angle through hot melt adhesive. Thus, utilize multilayer composite structure, realize efficient electromagnetic shielding. Meanwhile, built -in has independent electromagnetic shielding frame, avoids the device damage caused by static electricity accumulation.

Description

Technical Field

[0001] This utility model relates to a transport cardboard box, and more particularly to an electromagnetically shielded transport cardboard box. Background Technology

[0002] Currently, traditional shipping cartons primarily use corrugated cardboard, with improvements mainly focused on load-bearing capacity and shock resistance, but lacking electromagnetic shielding capabilities. With the increasing demand for transporting precision electronic equipment, it is necessary to add independent electromagnetic shielding sleeves inside the shipping cartons. Such electromagnetic shielding requires customization based on the shape of the electronic equipment, resulting in high implementation costs. Furthermore, during packaging and storage, localized wear can easily occur, affecting the final electromagnetic shielding effect.

[0003] Currently, simply stacking electromagnetic shielding sleeves with cardboard boxes still presents numerous problems. For example:

[0004] Existing technologies attempt to introduce electromagnetic shielding structures into packaging materials, but the following problems still exist:

[0005] Existing technology CN110504553B provides a multilayer ultra-wideband absorber. It discloses a composite scheme of electrical loss and magnetic materials, but does not address charge dissipation designs such as grounded metal pillars, leading to a risk of static electricity accumulation that could damage electronic equipment. Furthermore, its design is incompatible with shipping cartons.

[0006] Meanwhile, the existing technology CN106356638A discloses a graphene absorber, which adopts an adjustable broadband design. Although it has advantages in terms of absorption rate adjustment, it relies on the combination of graphene film and semiconductor dielectric layer, and the material cost is more than 5 times that of ordinary cardboard boxes, making it difficult to apply on a large scale in the field of transportation packaging.

[0007] In view of the above-mentioned shortcomings, the designer actively researched and innovated in order to create an electromagnetically shielded transport carton that would have greater industrial value. Utility Model Content

[0008] To solve the above-mentioned technical problems, the purpose of this utility model is to provide an electromagnetically shielded transport carton.

[0009] This utility model discloses an electromagnetically shielded transport carton, comprising a carton body with a lid extending from the top of the carton body. The carton body and lid are a composite structure, including a substrate layer, an absorbing layer, and a conductive layer. Electromagnetic shielding strips are adhered to the inner corners of the carton body, and these strips are interconnected to form an electromagnetic shielding frame. The electromagnetic shielding frame is connected to the conductive layer. The substrate layer is corrugated cardboard with a flame-retardant coating. The absorbing layer is a silicone rubber composite layer filled with magnetic absorbing particles, and has a thickness of 2-5 mm. The absorbing layer is connected to the substrate layer via hot melt adhesive. The conductive layer is an aluminized carbon fiber woven mesh, connected to the absorbing layer via hot melt adhesive. The electromagnetic shielding strips are galvanized iron strips, connected to the inner corners via hot melt adhesive.

[0010] Furthermore, in the aforementioned electromagnetic shielded transport carton, the corrugated cardboard has a flute height of 3-5mm and a flute count of 30-50 per 30cm; the flame-retardant coating is a hydrated zinc borate layer, and the thickness of the flame-retardant coating is 0.1-0.3mm.

[0011] Furthermore, in the aforementioned electromagnetic shielded transport carton, a rock wool insulation layer is sandwiched between the substrate layer and the wave-absorbing layer, and the thickness of the rock wool insulation layer is 1-2 mm.

[0012] Furthermore, in the aforementioned electromagnetically shielded transport carton, the magnetic absorbing particles are NiZn ferrite powder, and the particle size of the magnetic absorbing particles is 2-4μm.

[0013] Furthermore, in the aforementioned electromagnetically shielded transport carton, the sheet resistance of the aluminized carbon fiber woven mesh is ≤0.1Ω / sq, the mesh count is 50-100 mesh, the thickness of the aluminized layer is 50-100nm, and the weaving structure of the woven mesh is orthogonal plain weave.

[0014] Furthermore, in the aforementioned electromagnetically shielded transport carton, the galvanized iron strip has a triangular cross-section; and copper wire is wound around the galvanized iron strip.

[0015] Furthermore, in the aforementioned electromagnetic shielded transport carton, at the four bottom corners of the carton body, there are downwardly protruding support blocks. The height of the support blocks is 5-10mm, and a grounding metal post runs through the support block. The grounding metal post is electrically connected to the conductive layer.

[0016] Furthermore, in the aforementioned electromagnetically shielded transport carton, the inner walls of the carton body and the lid are coated with an electrostatic dissipation layer, which is a compound coating containing quaternary ammonium salts.

[0017] Furthermore, in the aforementioned electromagnetically shielded transport carton, the carton body contains several honeycomb-shaped partitions, which are corrugated cardboard; or the honeycomb-shaped partitions are ABS plastic sheets, and the surface of the ABS plastic sheets is distributed with several copper wires, which are connected to the conductive layer.

[0018] By means of the above solution, this utility model has at least the following advantages:

[0019] 1. High-efficiency electromagnetic shielding is achieved through a multi-layer composite structure. A multi-level electromagnetic attenuation mechanism is formed through a composite laminate structure of a substrate layer, an absorbing layer, and a conductive layer. The aluminized carbon fiber woven mesh constructs the conductive path, and the silicone rubber absorbing layer can generate a shielding effectiveness of ≥60dB for electromagnetic waves in the 0.8-5GHz frequency band, effectively isolating the signal transmission of electronic devices such as mobile phones.

[0020] 2. Possesses moderate structural stability. Utilizing corrugated cardboard as the base material, combined with a fire-retardant coating, the carton's deformation is less than 3mm when bearing a 20kg load, while also meeting the UL94 V-1 flame-retardant standard, significantly improving transportation safety and stacking stability.

[0021] 3. It has a built-in independent electromagnetic shielding frame, forming a complete Faraday cage structure. This allows for a grounding resistance of less than 4Ω, effectively dissipating static charge and preventing device damage caused by static electricity accumulation.

[0022] 4. An additional rock wool insulation layer is added, which can keep the temperature rise inside the box ≤3℃ / h at an ambient temperature of 35℃; the honeycomb partition structure can not only realize the management of items in different areas, but also form an auxiliary shielding cavity through the copper wire network on the surface, meeting diverse electromagnetic protection needs.

[0023] 5. The overall structure is simple, and the cardboard box can be easily modified to meet the requirements of low-cost electromagnetic shielding box implementation.

[0024] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0025] Figure 1 This is a structural diagram of an electromagnetically shielded transport carton.

[0026] Figure 2 This is a schematic diagram showing the breakdown of the composite structure. (The magnetic absorbing particles are randomly distributed; the diagram is for illustrative purposes only.)

[0027] Figure 3 This is a schematic diagram of the composite structure.

[0028] Figure 4This is a schematic diagram showing the combination of the electromagnetic shielding strip and the inner corner.

[0029] The meanings of the labels in the figures are as follows.

[0030] Detailed Implementation

[0031] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0032] like Figures 1 to 4 The electromagnetically shielded transport carton includes a carton body 1 and a lid 2 extending from the top of the carton body 1. Its unique feature is that the carton body 1 and lid 2 are a composite structure, including a base layer 3, an absorbing layer 4 distributed on the base layer 3, and a conductive layer 5 distributed on the absorbing layer 4. This achieves effective internal electromagnetic shielding. Simultaneously, electromagnetic shielding strips 6 are affixed to the inner corners of the carton body 1. These electromagnetic shielding strips 6 are interconnected, forming an electromagnetic shielding frame, which is electrically connected to the conductive layer 5. This constitutes a simple Faraday cage internal structure, meeting the electromagnetic shielding requirements after conventional items are placed inside. Furthermore, to achieve appropriate load-bearing and deformation resistance, the base layer 3 is made of corrugated cardboard with a flame-retardant coating (the surface refers to the outer surface constituting the carton body 1, not shown in the figure), meeting the fire protection requirements during daily stacking. During implementation, to enhance the electromagnetic shielding effect of the internal space of the carton body 1, the absorbing layer 4 is a silicone rubber composite layer filled with several magnetic absorbing particles 8 to absorb electromagnetic waves. Referring to the normal placement of communication equipment requiring electromagnetic shielding, such as mobile phones, the thickness of the absorbing layer 4 is only 2-5mm. Considering its bonding stability, the absorbing layer 4 is connected to the substrate layer 3 via hot melt adhesive. During use, to avoid localized static electricity accumulation and to achieve a near-zero charge layout in conjunction with the electromagnetic shielding strip 6, the conductive layer 5 is an aluminized carbon fiber woven mesh, connected to the absorbing layer 4 via hot melt adhesive. Furthermore, the electromagnetic shielding strip 6 is a galvanized iron strip, connected to the inner corners via hot melt adhesive.

[0033] In a preferred embodiment of this invention, the corrugated cardboard has a flute height of 3-5mm and a flute count of 30-50 per 30cm. This provides a suitable thickness, preventing deformation and collapse. Of course, for applications requiring high load-bearing capacity, the flute count or thickness can be increased, and can be customized according to the specific usage environment. Simultaneously, the flame-retardant coating is a hydrated zinc borate layer with a thickness of 0.1-0.3mm. This ensures uniform coating during manufacturing and enhances the flame-retardant effect.

[0034] Furthermore, considering the moderate heat insulation effect during placement, allowing it to adapt to high-temperature indoor and outdoor environments without causing heat accumulation inside the enclosure, a rock wool insulation layer 7, with a thickness of 1-2mm, is sandwiched between the base material layer 3 and the wave-absorbing layer 4. Simultaneously, to enhance the wave absorption effect, the magnetic wave-absorbing particles 8 are NiZn ferrite powder with a particle size of 2-4μm. Moreover, the conductive layer 5, with its attached aluminized carbon fiber woven mesh, has a sheet resistance ≤0.1Ω / sq and a mesh count of 50-100 mesh. The thickness of the aluminized layer is 50-100nm. Furthermore, the selected woven mesh features an orthogonal plain weave structure, resulting in a relatively uniform mesh structure.

[0035] In practical implementation, the galvanized iron strip has a triangular cross-section, which effectively fits at the inner corners. For applications requiring strong shielding, copper wire can be wrapped around the galvanized iron strip. Furthermore, at the four bottom corners of the carton body 1, downward-protruding support blocks 9 are connected, with a height of 5-10mm, providing appropriate elevation. A grounding metal post 10 passes through the support block 9 and is electrically connected to the conductive layer 5. This allows for simple grounding and discharge of any potential static electricity.

[0036] Furthermore, to effectively prevent static electricity from accumulating on the inner walls during use, the inner walls of the carton body 1 and the lid 2 are coated with a static dissipation layer, which is a compound coating containing quaternary ammonium salts. Simultaneously, considering the need for mutual shielding and spacing between different items, this invention can also place several honeycomb-shaped partitions 11 inside the carton body 1. The honeycomb-shaped partitions 11 are made of corrugated cardboard. Considering the need for certain auxiliary supports, ABS plastic sheets can also be used to construct the honeycomb-shaped partitions 11. Moreover, to achieve the shielding and conductivity effects of the honeycomb-shaped partitions 11 themselves, several copper wires are distributed on the surface of the ABS plastic sheet, and the copper wires are electrically connected to the conductive layer 5. The working principle of this invention is as follows:

[0037] Taking mobile phone placement as an example, different mobile phones are placed inside the cardboard box. If it is necessary to distinguish the different sources of mobile phones, honeycomb partitions can be added for zoned placement.

[0038] Subsequently, relying on the cooperation of the conductive layer, the absorbing layer, and the electromagnetic shielding frame, the mobile phone signal was suppressed, thus achieving electromagnetic shielding.

[0039] As can be seen from the above textual description and the accompanying drawings, the present invention has the following advantages:

[0040] 1. High-efficiency electromagnetic shielding is achieved through a multi-layer composite structure. A multi-level electromagnetic attenuation mechanism is formed through a composite laminate structure of a substrate layer, an absorbing layer, and a conductive layer. The aluminized carbon fiber woven mesh constructs the conductive path, and the silicone rubber absorbing layer can generate a shielding effectiveness of ≥60dB for electromagnetic waves in the 0.8-5GHz frequency band, effectively isolating the signal transmission of electronic devices such as mobile phones.

[0041] 2. Possesses moderate structural stability. Utilizing corrugated cardboard as the base material, combined with a fire-retardant coating, the carton's deformation is less than 3mm when bearing a 20kg load, while also meeting the UL94 V-1 flame-retardant standard, significantly improving transportation safety and stacking stability.

[0042] 3. It has a built-in independent electromagnetic shielding frame, forming a complete Faraday cage structure. This allows for a grounding resistance of less than 4Ω, effectively dissipating static charge and preventing device damage caused by static electricity accumulation.

[0043] 4. An additional rock wool insulation layer is added, which can keep the temperature rise inside the box ≤3℃ / h at an ambient temperature of 35℃; the honeycomb partition structure can not only realize the management of items in different areas, but also form an auxiliary shielding cavity through the copper wire network on the surface, meeting diverse electromagnetic protection needs.

[0044] 5. The overall structure is simple, and the cardboard box can be easily modified to meet the requirements of low-cost electromagnetic shielding box implementation.

[0045] Furthermore, the directions or positional relationships described in this utility model are based on the directions or positional relationships shown in the accompanying drawings. They are only for the purpose of facilitating the description of this utility model and simplifying the description, and are not intended to indicate or imply that the device or structure referred to must have a specific orientation, or to operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0046] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An electromagnetically shielded transport carton, comprising a carton body (1), wherein a lid (2) extends from the top of the carton body (1), characterized in that: The carton body (1) and lid (2) are composite structures, including a substrate layer (3), a wave-absorbing layer (4) distributed on the substrate layer (3), and a conductive layer (5) distributed on the wave-absorbing layer (4); electromagnetic shielding strips (6) are pasted on the inner corners of the carton body (1), and the electromagnetic shielding strips (6) are electrically connected to each other to form an electromagnetic shielding frame; the electromagnetic shielding frame is connected to the conductive layer (5); the substrate layer (3) is corrugated cardboard, and its surface is coated with a flame-retardant coating. The absorbing layer (4) is a silicone rubber composite layer, which is filled with several magnetic absorbing particles (8). The thickness of the absorbing layer (4) is 2-5 mm. The absorbing layer (4) is connected to the substrate layer (3) by hot melt adhesive. The conductive layer (5) is an aluminized carbon fiber woven mesh. The conductive layer (5) is connected to the absorbing layer (4) by hot melt adhesive. The electromagnetic shielding strip (6) is a galvanized iron strip. The electromagnetic shielding strip (6) is connected to the inner corner by hot melt adhesive.

2. The electromagnetically shielded transport carton according to claim 1, characterized in that: The corrugated cardboard has a flute height of 3-5mm and a flute count of 30-50 per 30cm; the flame-retardant coating is a zinc borate hydrate layer with a thickness of 0.1-0.3mm.

3. The electromagnetically shielded transport carton according to claim 1, characterized in that: A rock wool insulation layer (7) is sandwiched between the substrate layer (3) and the wave-absorbing layer (4), and the thickness of the rock wool insulation layer (7) is 1-2 mm.

4. The electromagnetically shielded transport carton according to claim 1, characterized in that: The magnetic absorbing particles (8) are NiZn ferrite powders, and the particle size of the magnetic absorbing particles (8) is 2-4 μm.

5. The electromagnetically shielded transport carton according to claim 1, characterized in that: The sheet resistance of the aluminized carbon fiber woven mesh is ≤0.1Ω / sq, the mesh count is 50-100 mesh, the thickness of the aluminized layer is 50-100nm, and the weaving structure of the woven mesh is orthogonal plain weave.

6. The electromagnetically shielded transport carton according to claim 1, characterized in that: The galvanized iron strip has a triangular cross-section; copper wire is wrapped around the galvanized iron strip.

7. The electromagnetically shielded transport carton according to claim 1, characterized in that: At the four bottom corners of the carton body (1), there are downward protruding support blocks (9). The height of the support blocks (9) is 5-10mm. A grounding metal post (10) runs through the support block (9). The grounding metal post (10) is electrically connected to the conductive layer (5).

8. The electromagnetically shielded transport carton according to claim 1, characterized in that: The inner walls of the carton body (1) and the lid (2) are coated with an electrostatic dissipation layer, which is a compound coating containing quaternary ammonium salt.

9. The electromagnetically shielded transport carton according to claim 1, characterized in that: The carton body contains several honeycomb partitions (11), which are corrugated cardboard; or the honeycomb partitions (11) are ABS plastic sheets, and the surface of the ABS plastic sheets is covered with several copper wires, which are connected to the conductive layer (5).

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