Copper foil graphite composite adhesive tape with low frequency shielding and high thermal conductivity

Abstract

The utility model discloses a copper foil graphite composite adhesive tape with low frequency shielding and high thermal conductivity. Comprising a nanocarbon layer, a copper foil layer arranged on the lower end face of the nanocarbon layer, an iron-nickel layer arranged on the lower end face of the copper foil layer in an electroplating mode, a graphite layer, an edge covering layer for covering edges of graphite, a polyester film layer arranged on the lower end face of the edge covering layer, and grid glue arranged on the lower end face of the polyester film layer, and the lower end face of the iron-nickel layer is connected with the upper end face of the edge covering layer. The adhesive tape has the advantages that the nano-carbon layer and the graphite layer are respectively arranged on two sides of the iron-nickel layer to serve as main heat conduction layers, so that heat can be conveniently guided out from a product along the adhesive tape; the iron-nickel layer serves as an electromagnetic shielding layer to shield low-frequency-band electromagnetism lower than 1 MHZ, meanwhile, the iron-nickel layer has the heat conduction function, and the copper foil layer serves as electromagnetism larger than 1 MHZ to shield and conduct heat. And the edge covering layer is used for covering the edge of the graphite, so that the graphite powder is effectively prevented from falling off.

Description

Technical Field

[0001] This utility model relates to the field of adhesive tape, specifically a low-frequency shielding, high thermal conductivity copper foil-graphite composite adhesive tape. Background Technology

[0002] With the advancement of technology, there is a demand in fields such as LED lighting, electronic devices, communication equipment, automobiles, and medical equipment for a high thermal conductivity tape that can quickly and effectively conduct heat, improving product safety and reliability. Simultaneously, a low-frequency shielding tape is needed to prevent electromagnetic radiation from equipment from negatively impacting the surrounding environment and human health. However, currently available tapes combining thermal conductivity and low-frequency shielding effectiveness use graphite coatings as the heat dissipation layer. Graphite coatings are expensive to manufacture, and these tapes only have the primary heat dissipation coating on one side of the shielding layer, leaving room for improvement in the effectiveness of heat dissipation along the tape.

[0003] For example, Chinese patent CN209652218U discloses a nickel-plated copper foil shielding tape, comprising a copper foil layer, a nickel plating layer formed on one surface of the copper foil layer by magnetron sputtering, and a conductive and thermally conductive adhesive layer coated on the other surface of the copper foil layer. A release film layer is attached to the side of this conductive and thermally conductive adhesive layer opposite to the copper foil layer. A PET layer is bonded to the side of the nickel plating layer opposite to the copper foil layer via an adhesive layer. The other side of the PET layer is coated with a heat-dissipating coating and a clear varnish layer sequentially from the inside out. The heat-dissipating coating is a carbon nanotube heat-dissipating coating or a graphene heat-dissipating coating. The aforementioned nickel-plated copper foil shielding tape forms the heat-dissipating coating through a coating method, resulting in high processing costs. Furthermore, the heat-dissipating coating is only applied to one side of the nickel plating layer, meaning the overall tape does not achieve optimal heat dissipation.

[0004] Therefore, it is necessary to provide a low-frequency shielding copper foil-graphite composite tape with high thermal conductivity. Summary of the Invention

[0005] This invention provides a low-frequency shielding copper foil-graphite composite tape with high thermal conductivity, which effectively solves the problems of high manufacturing cost and suboptimal heat dissipation effect of existing heat dissipation shielding tapes.

[0006] The technical solution adopted in this utility model is:

[0007] A low-frequency shielding, high thermal conductivity copper foil-graphite composite tape includes a nano-carbon layer, a copper foil layer disposed on the lower end face of the nano-carbon layer, an electroplated iron-nickel layer disposed on the lower end face of the copper foil layer, a graphite layer, an edge-wrapping layer for wrapping the graphite, a polyester film layer disposed on the lower end face of the edge-wrapping layer, and a grid adhesive disposed on the lower end face of the polyester film layer, wherein the lower end face of the iron-nickel layer is connected to the upper end face of the edge-wrapping layer.

[0008] Furthermore, the edge-sealing layer includes a first adhesive layer disposed on the upper surface of the graphite layer and a second adhesive layer disposed on the lower surface and sides of the graphite layer. The first and second adhesive layers seal the graphite layer, and the polyester film layer is bonded to the second adhesive layer. Both the first and second adhesive layers are thermally conductive acrylic adhesive layers.

[0009] Furthermore, the thickness of the polyester film layer is 0.01 mm.

[0010] Furthermore, the thickness of the graphite layer ranges from 0.025 mm to 0.04 mm.

[0011] Furthermore, the thickness of the copper foil layer ranges from 0.03 mm to 0.06 mm.

[0012] Furthermore, the textured adhesive adheres to the product.

[0013] Furthermore, the thickness of the nano-carbon layer is 0.04 mm to 0.06 mm.

[0014] The beneficial effects of this utility model are as follows: Nano-carbon layers and graphite layers are respectively disposed on both sides of the iron-nickel layer as the main heat-conducting layers, facilitating heat dissipation from the product along the tape; the iron-nickel layer acts as an electromagnetic shielding layer to shield low-frequency electromagnetic fields below 1MHz, while also being thermally conductive; the copper foil layer shields electromagnetic fields above 1MHz while also being thermally conductive. The edge-wrapping layer effectively prevents graphite powder from falling off. Attached Figure Description

[0015] Figure 1 This is an overall schematic diagram of a low-frequency shielding, high thermal conductivity copper foil-graphite composite tape provided in an embodiment of this application.

[0016] The following layers are marked in the diagram: 1. Nano carbon layer; 2. Copper foil layer; 3. Iron-nickel layer; 4. Graphite layer; 5. Polyester film layer; 6. Checkered adhesive; 7. First adhesive layer; 8. Second adhesive layer. Detailed Implementation

[0017] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0018] like Figure 1As shown, the first embodiment provided in this application is a low-frequency shielding, high thermal conductivity copper foil graphite composite tape, including a nano carbon layer 1, a copper foil layer 2 disposed on the lower end face of the nano carbon layer 1, an iron-nickel layer 3 electroplated on the lower end face of the copper foil layer 2, a graphite layer 4, an edge-wrapping layer for wrapping the graphite, a polyester film layer disposed on the lower end face of the edge-wrapping layer, and a grid adhesive 6 disposed on the lower end face of the polyester film layer 5. The lower end face of the iron-nickel layer 3 is connected to the upper end face of the edge-wrapping layer.

[0019] The graphite layer 4 can be prepared by continuously rolling graphite powder using a roller press, which is less expensive than preparing a graphite coating. Simultaneously, controlling the density of graphite in the graphite layer 4 can compensate for the fact that its heat dissipation effect is slightly lower (around 10%) than that of the graphite coating.

[0020] In the above design, the product is attached using a textured adhesive 6. The textured adhesive 6 has a ventilation grid that allows for ventilation after attachment, and the grid disappears within 24 hours of attachment. Nano-carbon layer 1 and graphite layer 4 are respectively placed on both sides of the iron-nickel layer 3 as the main heat-conducting layers, facilitating heat dissipation from the product along the adhesive tape. The iron-nickel layer 3 serves as an electromagnetic shielding layer, shielding low-frequency electromagnetic fields below 1MHz, while also being thermally conductive. The copper foil layer 2 shields electromagnetic fields above 1MHz while also being thermally conductive. An edge-wrapping layer is used to wrap the graphite, effectively preventing graphite powder from falling off.

[0021] Specifically, the edge-sealing layer includes a first adhesive layer 7 disposed on the upper surface of the graphite layer 4 and a second adhesive layer 8 disposed on the lower surface and sides of the graphite layer 4. The first adhesive layer 7 and the second adhesive layer 8 seal the graphite layer 4, and the polyester film layer 5 is bonded to the lower surface of the second adhesive layer 8. Both the first adhesive layer 7 and the second adhesive layer 8 are thermally conductive acrylic adhesive layers. It should be noted that the total thickness of the tape does not exceed 1 mm, the thickness of the second adhesive layer 8 is less than 1 mm, and the sides of the second adhesive layer 8 will not adhere to other components during use and affect its use.

[0022] In the above design, by bonding the polyester film to the second adhesive layer 8, the heat resistance of the polyester film can be used for heat conduction, while the strength and toughness of the polyester film can be used to effectively seal and protect the graphite layer 4.

[0023] Specifically, the thickness of the polyester film layer 5 is 0.01 mm.

[0024] In the above design, the tensile strength of the polyester film layer 5 is 150 MPa when the thickness is 0.01 mm, which can meet the edge-wrapping requirements of the graphite layer 4.

[0025] Specifically, the thickness of the graphite layer 4 ranges from 0.025 mm to 0.04 mm.

[0026] In the above design, the thickness of graphite layer 4 ranges from 0.025mm to 0.04mm to meet the requirements for thinner product use.

[0027] Specifically, the thickness of the copper foil layer 2 ranges from 0.03 mm to 0.06 mm.

[0028] In the above design, the thickness of the copper foil layer 2 ranges from 0.03mm to 0.06mm, which satisfies both the overall support of the tape and the need for a thinner product.

[0029] Specifically: the checkered adhesive 6 is attached to the product.

[0030] Specifically, the thickness of the nano-carbon layer 1 is 0.04 mm to 0.06 mm.

[0031] The second embodiment of this application provides a low-frequency shielding, high thermal conductivity copper foil-graphite composite tape, comprising a nano-carbon layer 1, a copper foil layer 2 disposed on the lower end face of the nano-carbon layer 1, an iron-nickel layer 3 electroplated on the lower end face of the copper foil layer 2, a graphite layer 4, an edge-binding layer for wrapping the graphite, a polyester film layer disposed on the lower end face and side face of the edge-binding layer, and a textured adhesive 6 disposed on the lower end face of the polyester film layer 5. The lower end face of the iron-nickel layer 3 is connected to the upper end face of the edge-binding layer. The edge-binding layer includes a first adhesive layer 7 disposed on the upper end face of the graphite layer 4 and a second adhesive layer 8 disposed on the lower end face and side face of the graphite layer 4. The first adhesive layer 7 and the second adhesive layer 8 are graphite sealants, and the polyester film layer 5 is bonded to the second adhesive layer 8. The thickness of the polyester film layer 5 is 0.01 mm. The thickness of the graphite layer 4 ranges from 0.025 mm to 0.04 mm. The thickness of the copper foil layer 2 ranges from 0.03 mm to 0.06 mm. The iron-nickel ratio of the iron-nickel layer 3 is typically 3:7. The textured adhesive 6 is attached to the product. The thickness of the nano-carbon layer 1 is 0.04 mm to 0.06 mm.

[0032] In the above design, the nano carbon layer 1 and the graphite layer 4 are used as thermal conductive layers to provide excellent thermal conductivity for the composite tape. The iron-nickel layer 3 is used as an electromagnetic shielding layer to provide excellent shielding effect in the low frequency band below 1MHz. The polyester film layer is used for edge wrapping to prevent graphite delamination. The checkered adhesive 6 plays a role in venting when the tape is applied.

[0033] In further detail, it should be understood that the above description is only a specific embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A low-frequency shielding, high thermal conductivity copper foil-graphite composite tape, characterized in that: It includes a nano carbon layer (1), a copper foil layer (2) disposed on the lower end face of the nano carbon layer (1), an iron-nickel layer (3) electroplated on the lower end face of the copper foil layer (2), a graphite layer (4), an edge-wrapping layer for wrapping the graphite layer (4), a polyester film layer (5) disposed on the lower end face of the edge-wrapping layer, and a grid adhesive (6) disposed on the lower end face of the polyester film layer (5). The lower end face of the iron-nickel layer (3) is connected to the upper end face of the edge-wrapping layer.

2. The low-frequency shielding, high thermal conductivity copper foil-graphite composite tape according to claim 1, characterized in that: The edge-sealing layer includes a first adhesive layer (7) disposed on the upper surface of the graphite layer (4) and a second adhesive layer (8) disposed on the lower surface and side surface of the graphite layer (4). The first adhesive layer (7) and the second adhesive layer (8) seal the graphite layer (4). The polyester film layer (5) is bonded to the lower surface of the second adhesive layer (8). Both the first adhesive layer (7) and the second adhesive layer (8) are thermally conductive acrylic adhesive layers.

3. The low-frequency shielding, high thermal conductivity copper foil-graphite composite tape according to claim 1, characterized in that: The thickness of the polyester film layer (5) is 0.01 mm.

4. The low-frequency shielding, high thermal conductivity copper foil-graphite composite tape according to claim 1, characterized in that: The thickness of the graphite layer (4) ranges from 0.025 mm to 0.04 mm.

5. The low-frequency shielding, high thermal conductivity copper foil-graphite composite tape according to claim 1, characterized in that: The thickness of the copper foil layer (2) ranges from 0.03 mm to 0.06 mm.

6. The low-frequency shielding, high thermal conductivity copper foil-graphite composite tape according to claim 1, characterized in that: The checkered adhesive (6) is attached to the product.

7. The low-frequency shielding, high thermal conductivity copper foil-graphite composite tape according to claim 1, characterized in that: The thickness of the nano-carbon layer (1) is 0.04 mm to 0.06 mm.

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