Electromagnetic shielding aluminum foil tape

Abstract

The utility model belongs to aluminum foil adhesive tape field discloses electromagnetic shielding aluminum foil adhesive tape, connect in proper order including aluminum foil layer, heat preservation layer and high temperature resistance layer, one side of aluminum foil layer is provided with high temperature resistance layer, is provided with heat preservation layer between high temperature resistance layer and aluminum foil layer, the side of high temperature resistance layer far from heat preservation layer is coated with the glue layer, the inside of heat preservation layer is provided with a plurality of flow channel that penetrates heat preservation layer, and glue column is poured in flow channel, and the glue column that penetrates is set up in heat preservation layer, the glue of heat preservation layer two sides and glue column jointly form the reinforcing structure of anchor bolt type through the glue column, however, when the heat of the base material that aluminum foil adhesive tape bundles is transmitted along the glue column, the cross-sectional area of the glue column is small, and its contact area with the heat source is small, compared with the glue that is laid between the heat preservation layer and the high temperature resistance layer, the heat conducted to its inside along the axial direction of the glue column in unit time is significantly reduced, so that the delamination phenomenon between layers due to delamination can be reduced under the condition that the temperature of the bundled base material is relatively high.

Description

Technical Field

[0001] This disclosure pertains to the field of aluminum foil tape, specifically relating to electromagnetic shielding aluminum foil tape. Background Technology

[0002] Electromagnetic shielding aluminum foil tape is widely used in electronic equipment, communication devices, aerospace, and automotive industries. It is primarily used to suppress electromagnetic interference, prevent signal leakage, and also provides some heat insulation and protection. Traditional electromagnetic shielding tape typically consists of an aluminum foil layer, an adhesive layer, and release paper. While its structure is simple, it is prone to problems such as adhesive aging, decreased adhesion, and interlayer peeling under high temperature, high humidity, or vibration environments, thus affecting its shielding effectiveness and service life.

[0003] Especially in high-temperature environments such as engine compartments and near high-temperature electronic components, conventional adhesives are prone to softening, increased fluidity, or curing failure under continuous high temperatures, leading to delamination and detachment between the aluminum foil layer and the base layer, which in turn affects the continuity and reliability of electromagnetic shielding. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this disclosure is to provide an electromagnetic shielding aluminum foil tape, which solves the problem that when the tape is used in a high-temperature environment, heat is easily conducted along the adhesive layer, which leads to a decrease in adhesive performance, thereby weakening the interlayer adhesion and causing delamination.

[0005] The objective of this disclosure can be achieved through the following technical solutions:

[0006] Electromagnetic shielding aluminum foil tape includes: an aluminum foil layer, an insulation layer, and a high-temperature resistant layer that are bonded together in sequence;

[0007] A high-temperature resistant layer is provided on one side of the aluminum foil layer, and a heat insulation layer is provided between the high-temperature resistant layer and the aluminum foil layer;

[0008] The side of the high-temperature resistant layer away from the insulation layer is coated with an adhesive layer;

[0009] The inner side of the insulation layer is provided with multiple flow channels that penetrate the insulation layer, and glue columns are poured into the flow channels.

[0010] In some disclosures, the cross-section of the flow channel is circular.

[0011] In some disclosures, the cross-section of the flow channel is polygonal.

[0012] In some disclosures, the movement direction of the flow channel is perpendicular to the inner wall of the aluminum foil layer.

[0013] In some disclosures, the flow channels are evenly distributed on the inner side of the insulation layer.

[0014] In some disclosures, the insulation layer is a closed-cell foamed silicone rubber layer.

[0015] In some disclosures, the high-temperature resistant layer is described as a polyester film.

[0016] In some disclosures, the adhesive used for the adhesive layer and the adhesive column is high-temperature resistant silicone, phenolic resin adhesive, or epoxy resin adhesive.

[0017] The explanations of the nouns, conjunctions, or adjectives used in the above technical solutions are as follows:

[0018] A fixed connection refers to a connection in which parts or components are fixed in place and there is no relative movement between them;

[0019] A rotating connection is a connection between parts that allows the parts to rotate relative to each other.

[0020] Threaded connections are a type of detachable fixed connection with advantages such as simple structure, reliable connection, and convenient assembly and disassembly. They are widely used in mechanical engineering and connection structure fields.

[0021] A sliding connection is a connection between parts that allows the parts to slide against each other.

[0022] The beneficial effects of this disclosure are:

[0023] By setting through adhesive columns within the insulation layer, the adhesive on both sides of the insulation layer and the adhesive columns together form a reinforced structure similar to an anchor. However, when the heat of the substrate bundled with aluminum foil tape is transferred along the adhesive columns, the cross-sectional area of ​​the adhesive columns is small, and the contact area with the heat source is small. Compared with the adhesive laid flat between the insulation layer and the high-temperature resistant layer, the heat conducted to its interior along the axial direction of the adhesive columns per unit time is significantly reduced. Therefore, it can reduce the phenomenon of delamination between layers due to adhesive failure when the temperature of the bundled substrate is high. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the internal structure of an embodiment of this disclosure;

[0026] Figure 2 This is a schematic diagram of the overall structure of an embodiment of this disclosure;

[0027] Figure 3 This is an exploded structural diagram of the insulation layer and flow channel of the first embodiment of this disclosure;

[0028] Figure 4 This is an exploded structural diagram of the insulation layer and flow channel of the second embodiment of this disclosure.

[0029] In the diagram: 1. Aluminum foil layer; 2. Insulation layer; 21. Flow channel; 22. Adhesive column; 3. High temperature resistant layer; 4. Adhesive layer. Detailed Implementation

[0030] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0031] Please refer to Figures 1 to 4 Electromagnetic shielding aluminum foil tape;

[0032] Includes: an aluminum foil layer 1, an insulation layer 2, and a high-temperature resistant layer 3, which are bonded together in sequence;

[0033] A high-temperature resistant layer 3 is provided on one side of the aluminum foil layer 1, and a heat insulation layer 2 is provided between the high-temperature resistant layer 3 and the aluminum foil layer 1.

[0034] The side of the high-temperature resistant layer 3 away from the insulation layer 2 is coated with an adhesive layer 4;

[0035] Multiple flow channels 21 penetrating the insulation layer 2 are provided on the inner side of the insulation layer 2, and glue columns 22 are poured into the flow channels 21.

[0036] During processing, firstly, multiple flow channels 21 are opened in the insulation layer 2 at its ends. Then, an adhesive layer is applied to the side of the aluminum foil layer 1 closest to the insulation layer 2. Next, one end of the insulation layer 2 is aligned with one end of the aluminum foil layer 1, and the aluminum foil layer 1 is bonded to the insulation layer 2 using the adhesive layer. Subsequently, an adhesive layer is applied to the side of the insulation layer 2 away from the aluminum foil layer 1. During the application process, some adhesive enters the flow channels 21, while the other end of the flow channels 21 is blocked by the aluminum foil layer 1. Therefore, the adhesive is stored inside the flow channels 21 and... An adhesive column 22 is formed, with its two ends connected to the aluminum foil layer 1 and the high-temperature resistant layer 3, respectively, thus forming an "anchor" between the aluminum foil layer 1 and the high-temperature resistant layer 3. The two ends of the adhesive column 22 are bonded to the adhesive between the aluminum foil layer 1 and the insulation layer 2, and to the adhesive between the insulation layer 2 and the high-temperature resistant layer 3, respectively. Therefore, the adhesive column 22 forms an "I" shape in the longitudinal section, which further increases the stability of the connection between the aluminum foil layer 1, the insulation layer 2, and the high-temperature resistant layer 3 at both ends of the adhesive column 22.

[0037] When the high temperature environment causes the chemical adhesion force (van der Waals force, etc.) of the adhesive layer to decrease, the anchoring of the adhesive column 22 is increased by the cooperation of the flow channel 21 and the adhesive column 22. Since the cross-sectional area of ​​the adhesive column 22 is small, its contact area with the heat source is small. Compared with the adhesive spread flat between the insulation layer 2 and the high temperature resistant layer 3, the heat conducted to its interior along the axial direction of the adhesive column 22 per unit time is significantly reduced. Therefore, the phenomenon of delamination can be reduced in high temperature environment.

[0038] First Embodiment

[0039] Please refer to Figures 1 to 3 The cross-section of flow channel 21 is circular;

[0040] The circular flow channel 21 makes it easier for the drill bit to penetrate. Since the drill bit itself forms a circular hole during the drilling process, no further adjustments are needed. This makes the processing of the flow channel 21 simpler and cheaper when the cross-section is circular.

[0041] Second Embodiment

[0042] Please refer to Figure 4 The cross-section of flow channel 21 is polygonal;

[0043] After the glue column 22 in the flow channel 21 solidifies, it forms a rectangular strip. The outer wall of the rectangle adheres to the inner wall of the insulation layer 2. Therefore, an interlock is formed between the glue column 22 and the inner wall of the flow channel 21. When the glue column 22 tends to be pulled outward, the corner of the side wall of the column will be stuck by the inner wall of the flow channel 21. Therefore, when the rectangular glue column 22 is pulled outward, the stress will be concentrated at the corner of the glue column 22. Compared with the flow channel 21 with a circular cross-section, the flow channel 21 with corners can further improve the anchoring force of the glue column 22.

[0044] Please refer to Figures 1 to 4 The direction of movement of the flow channel 21 is perpendicular to the inner wall of the aluminum foil layer 1;

[0045] The vertical flow channel 21 is easier to process than the inclined flow channel 21. When drilling, the drill bit can be inserted vertically. If the inclined flow channel 21 is used, the positional relationship between the drill bit and the insulation layer 2 needs to be adjusted, which will increase the complexity of drilling.

[0046] Please refer to Figure 3 The flow channels 21 are evenly distributed on the inner side of the insulation layer 2.

[0047] The overall strength of the insulation layer 2 is enhanced by uniformly distributed flow channels 21.

[0048] Insulation layer 2 is a closed-cell foamed silicone rubber layer;

[0049] The silicone rubber matrix of the foamed silicone rubber layer is filled with micro-closed-cell material, and the closed cells contain a large amount of air. Since the thermal conductivity of air is weak, the non-flowing air in the closed cells inside the layer reduces the heat transfer rate, which helps to further reduce the heat transferred to the glue column 22.

[0050] The high-temperature resistant layer 3 is a polyester film.

[0051] Polyimide film is a high-performance polymer film with a long-term operating temperature range of -269℃ to +250℃, and can withstand even higher temperatures in the short term. Polyimide film exhibits stable physical properties at high temperatures, thus improving the overall structural stability and reducing softening and deformation under high-temperature conditions.

[0052] The adhesive used in adhesive layer 4 and adhesive column 22 is high-temperature resistant silicone, phenolic resin or epoxy resin.

[0053] High-temperature resistant silicone, phenolic resin adhesive, or epoxy resin adhesive all have good high-temperature resistance. High-temperature resistant silicone can be used for a long time between -30℃ and 300℃, so it can also be used for a long time in the engine compartment of a car.

[0054] Furthermore, the high-temperature resistant silicone forms an elastomer after curing, which can effectively absorb and buffer the thermal stress caused by the different thermal expansion coefficients of each layer of material. This helps to alleviate the stress transmitted to the glue column 22 under dynamic loads such as engine vibration, and reduces the risk of the glue column 22 breaking.

[0055] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0056] The foregoing has shown and described the basic principles, main features, and advantages of this disclosure. Those skilled in the art should understand that this disclosure is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this disclosure. Various changes and modifications can be made to this disclosure without departing from its spirit and scope, and all such changes and modifications fall within the scope of this disclosure as claimed.

Claims

1. Electromagnetic shielding aluminum foil tape, characterized in that, include: The aluminum foil layer (1), the insulation layer (2), and the high-temperature resistant layer (3) are sequentially glued together; A high-temperature resistant layer (3) is provided on one side of the aluminum foil layer (1), and a heat insulation layer (2) is provided between the high-temperature resistant layer (3) and the aluminum foil layer (1); The high-temperature resistant layer (3) is coated with an adhesive layer (4) on the side away from the insulation layer (2); The inner side of the insulation layer (2) is provided with multiple flow channels (21) that penetrate the insulation layer (2), and glue columns (22) are poured into the flow channels (21).

2. The electromagnetic shielding aluminum foil tape according to claim 1, characterized in that, The cross-section of the flow channel (21) is circular.

3. The electromagnetic shielding aluminum foil tape according to claim 1, characterized in that, The cross-section of the flow channel (21) is polygonal.

4. The electromagnetic shielding aluminum foil tape according to claim 2, characterized in that, The movement direction of the flow channel (21) is perpendicular to the inner wall of the aluminum foil layer (1).

5. The electromagnetic shielding aluminum foil tape according to claim 4, characterized in that, The flow channels (21) are evenly distributed on the inner side of the insulation layer (2).

6. The electromagnetic shielding aluminum foil tape according to claim 1, characterized in that, The insulation layer (2) is a closed-cell foamed silicone rubber layer.

7. The electromagnetic shielding aluminum foil tape according to claim 1, characterized in that, The high-temperature resistant layer (3) is a polyester film.

8. The electromagnetic shielding aluminum foil tape according to claim 1, characterized in that, The adhesive used in the adhesive layer (4) and the adhesive column (22) is high-temperature resistant silicone, phenolic resin, or epoxy resin.

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