Heat-conducting adhesive tape and preparation method thereof

Abstract

The invention discloses a heat-conducting adhesive tape and a preparation method thereof, and particularly relates to the field of heat-conducting adhesive tape, the heat-conducting adhesive tape comprises an adhesive tape, the adhesive tape comprises an adhesive layer, a release layer I and a release layer II, the release layer I and the release layer II are respectively compounded on two surfaces of the adhesive layer, and the release layer II is provided with a plurality of groups of tearing areas. The tearing area is composed of a first lap joint part and a second lap joint part which are formed at the two opposite ends of the second release layer, the first lap joint part is in lap joint with the second lap joint part, and the adhesive layer comprises a base material and adhesives coated on the two sides of the base material. According to the adhesive tape, by forming the second lap joint parts of the first lap joint parts which are mutually lapped, when the adhesive tape is pasted on the LED lamp panel, the adhesive tape can be pasted in the middle firstly and then gradually pasted from the middle to the two ends, and due to the fact that the two sides of the LED lamp panel are mutually independent due to the influence of adhesive tape resilience force and the resilience force is reduced, the adhesive tape can be pasted on the LED lamp panel through the mode; bending deformation of the LED lamp panel can be greatly reduced, and after the LED lamp panel is attached to the substrate, the LED lamp panel is not prone to falling off due to deformation.

Description

Technical Field

[0001] This invention relates to the field of thermally conductive adhesive tape technology, and more specifically, to a thermally conductive adhesive tape and its preparation method. Background Technology

[0002] Thermally conductive adhesive tape is an adhesive tape designed to transfer heat while providing bonding. It contains highly thermally conductive materials to facilitate rapid heat transfer. The adhesive properties of the tape eliminate the need for fixing screws, avoiding uneven temperature distribution caused by tightening.

[0003] Due to the viscoelasticity of the tape itself, it can effectively fill the micro-gaps between contact interfaces to eliminate air and achieve effective heat conduction. It is mainly used for heat conduction between power supply modules and heat sinks, as well as for the adhesion and heat dissipation of LED light boards.

[0004] Thermally conductive adhesive tape has a double-layer bonding structure. Its basic structure is a release layer + adhesive layer + substrate layer + adhesive layer + release layer. When bonding, first peel off one layer of release layer, stick the substrate layer to the electronic device, and then peel off the other layer of release layer and stick it to the heat dissipation device or substrate.

[0005] When bonding LED light boards, because they are long and elastic, current adhesive tape can only be applied from one end to the other, or by tearing off an appropriate length of tape and applying it from both ends towards the middle. During application, the tape is stretched, and after application, the tape's own elasticity can easily bend the LED light board, causing significant deformation. As a result, the LED light board is prone to detaching from the substrate due to this deformation. Summary of the Invention

[0006] The present invention provides a thermally conductive adhesive tape and its preparation method. The problem to be solved is that when the tape is pasted on the LED light board, it is stretched. After pasting, due to the elasticity of the tape itself, it is easy to bend the LED light board and cause it to deform significantly. After the LED light board is pasted on the substrate, it is easy to fall off due to deformation.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a thermally conductive adhesive tape, comprising an adhesive layer and release layer one and release layer two respectively laminated on both sides of the adhesive layer. Release layer two has a plurality of tear zones, each tear zone consisting of overlap portion one and overlap portion two formed at opposite ends of release layer two, with overlap portion one overlapping overlap portion two. The adhesive layer comprises a substrate and an adhesive coated on both sides of the substrate.

[0008] Overlap 1 and Overlap 2 are made by the following steps:

[0009] Step 1: When composite release layer 2, a convex film is formed on release layer 2 using a composite component;

[0010] Step 2: Use the cutting assembly to cut the convex membrane, thereby forming overlap 1 and overlap 2 at the cut position.

[0011] Preferably, the composite component includes a first conveyor roller group and a second conveyor roller group. The adhesive layer and the first release layer are laminated at the first conveyor roller group, and the adhesive layer and the second release layer are laminated at the second conveyor roller group. A composite roller and a pressure roller capable of vertical movement are arranged between the first conveyor roller group and the second conveyor roller group. A lifting roller capable of horizontal movement is arranged between the composite roller and the pressure roller, and the movement direction of the lifting roller is perpendicular to the conveying direction of the belt. The second release layer is conveyed forward from the bottom of the pressure roller and the composite roller.

[0012] Preferably, the cutting assembly includes a bracket with a roller mounted on it, a cutting component mounted on one side of the bracket, the roller for spirally winding tape, and the cutting component for cutting the convex mold.

[0013] Preferably, the roller includes a main shaft, both ends of which are fixedly connected to a bracket. Both ends of the roller are fitted with movable sleeves. Several connecting rods are arranged in the circumferential direction of the main shaft. Both ends of each connecting rod are connected to arms, and the two ends of the connecting arms are respectively hinged to the movable sleeves and the ends of the connecting rods.

[0014] Preferably, each connecting rod is provided with several pairs of baffles, and the tape passes between each pair of baffles when it is wrapped around the roller.

[0015] Preferably, the cutting component includes a linear drive, a moving block is mounted on the output end of the linear drive, a rod is inserted into the moving block, and a blade is mounted on the front end of the rod. The linear drive is used to drive the blade to move along the axis of the roller.

[0016] Preferably, a fan is provided behind the cutting assembly, the fan outlet is arranged along the output direction of the conveyor belt, and a "V"-shaped guide plate is provided in front of the fan outlet, through which the conveyor belt passes.

[0017] This invention also provides a method for preparing a thermally conductive adhesive tape, comprising the following steps:

[0018] Step 1: Adhesive preparation. Add resin, thermally conductive powder, tackifier, curing agent, dispersant, and antioxidant according to the formula. Turn on the reactor and stir to form a uniform adhesive solution.

[0019] Step 2: Degassing. Add the adhesive solution to a vacuum degassing tank and let it stand for 1 minute to remove air bubbles from the solution.

[0020] Step 3: Coating. Use a coating machine to apply the prepared adhesive solution to the substrate surface in two coats. After each coat, allow it to dry and cure to set the adhesive solution and form an adhesive layer.

[0021] Step 4: Lamination. Use a laminating machine to laminate release layer 1 and release layer 2 onto both sides of the adhesive layer respectively.

[0022] Preferably, when composite release layer two, a convex film is formed on release layer two using a composite component, and the convex film is cut using a cutting component, thereby forming overlap portion one and overlap portion two at the cut position.

[0023] Preferably, after composite release layer one and release layer two, the tape is cured to solidify the adhesive on both sides of the adhesive layer.

[0024] The technical effects and advantages of this invention are as follows:

[0025] This invention cuts the release layer two to form overlapping portions two of overlapping portions one, so that when the tape is pasted onto the LED light board, the middle can be pasted first, and then the tape can be pasted from the middle to both ends. Since the influence of the tape's elastic force on both sides of the LED light board is independent and the elastic force is reduced, this method can greatly reduce the bending deformation of the LED light board. After the LED light board is pasted onto the substrate, it is not easy to fall off due to deformation. Attached Figure Description

[0026] Figure 1 This is a flowchart of the preparation method of the thermally conductive adhesive tape of the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of the tape of the present invention;

[0028] Figure 3 This is a schematic diagram of the cutting component of the present invention;

[0029] Figure 4 This is a top view of the cutting component of the present invention;

[0030] Figure 5 This is a schematic diagram of the structure of the composite component of the present invention;

[0031] Figure 6 This is a schematic diagram of the fan and guide vane of the present invention;

[0032] Figure 7 This is a schematic diagram of the process of forming a convex membrane according to the present invention.

[0033] The attached figures are labeled as follows: 1. Adhesive tape; 10. Convex film; 11. Adhesive layer; 12. Release layer one; 13. Release layer two; 131. Overlap part one; 132. Overlap part two; 2. Cutting assembly; 20. Support; 21. Roller; 210. Moving sleeve; 211. Main shaft; 212. Connecting rod; 213. Connecting arm; 214. Baffle; 22. Cutting component; 221. Linear drive component; 222. Moving block; 223. Insert rod; 224. Blade; 3. Composite assembly; 31. Conveyor roller group one; 32. Conveyor roller group two; 33. Composite roller; 34. Pressure roller; 35. Lifting roller; 4. Fan; 5. Guide plate. Detailed Implementation

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] Refer to the instruction manual appendix Figures 1-2 A thermally conductive adhesive tape includes a tape 1, which includes an adhesive layer 11 and release layer 12 and release layer 13 respectively laminated on both sides of the adhesive layer 11. The adhesive layer 11 includes a substrate and an adhesive coated on both sides of the substrate.

[0036] The above-mentioned method for preparing thermally conductive adhesive tape, such as Figure 1 As shown, it includes the following steps:

[0037] Step 1: Adhesive preparation. Add resin, thermally conductive powder, tackifier, curing agent, dispersant, and antioxidant according to the formula. Turn on the reactor and stir (300-500 rpm). Control the temperature at 60-80℃ and react for 2-4 hours to form a uniform adhesive solution. Control the viscosity at 500-2000 cP to ensure smooth subsequent coating.

[0038] The resin uses acrylate monomers, accounting for 20%-40% by mass; the thermally conductive powder uses alumina or BN ceramic particles, accounting for 35%-60% by mass; the tackifier uses rosin resin or terpene resin, accounting for 5%-15% by mass to improve viscosity; the curing agent uses isocyanates, accounting for 2%-5% by mass to enhance the hardness of the adhesive layer; the dispersant uses silane coupling agent KH550, accounting for 1%-3% by mass; and the antioxidant uses hindered phenols, accounting for 0.5%-2% by mass.

[0039] Step 2: Degassing. Use a vacuum degassing chamber (vacuum degree -0.08 to -0.09 MPa) and let it stand for 30-60 minutes to remove air bubbles from the solution and prevent voids from appearing in the adhesive layer after coating, which would affect the adhesion.

[0040] Step 3: Coating. First coating (adhesive coating on one side of the substrate): Apply the prepared adhesive to the surface of the substrate using a coating machine; Second coating (adhesive coating on the other side of the substrate): Apply the prepared adhesive to the surface of the substrate using a coating machine; After each coating, allow the adhesive solution to set and form adhesive layer 11;

[0041] When the substrate is non-woven fabric, a micro-grooved roller coating method is used. The gap between the doctor blade and the substrate is adjusted (10-30μm, corresponding to a dry adhesive layer thickness of 5-15μm), and the doctor blade angle is 30-45°. The substrate moves forward with the guide roller (speed 5-10m / min), and the doctor blade scrapes the adhesive in the glue storage tank onto the surface of the substrate. Excess adhesive flows back to the glue storage tank.

[0042] When the substrate is a film (PET / PP), a doctor blade coating method is used. A micro-grooved roller with a mesh pattern (cell depth 20-40μm) is selected. After the roller surface is immersed in adhesive, the excess adhesive is scraped off by a doctor blade, leaving only the adhesive in the cells. The linear pressure between the micro-grooved roller and the substrate is 0.1-0.2MPa to transfer the adhesive to the substrate surface. This method is suitable for thin adhesive layers (dry thickness 3-10μm).

[0043] After the first and second coatings, drying and curing are required to set the adhesive layer and form adhesive layer 11. During setting, the coated substrate is manually pulled through the guiding roller at the entrance of the drying tunnel. This process must avoid friction between the adhesive layer edges and the tunnel wall. The conveying system is started, with the initial speed set to 50% of the normal speed. After the substrate stabilizes in the middle section, the speed is gradually increased to the set speed. The set speed is adjusted according to the wet thickness of the adhesive layer to ensure that the substrate's residence time in the tunnel (i.e., drying time, generally 3-5 minutes) meets the solvent removal requirements. Specifically, when the wet thickness of the adhesive layer is 10-20 μm, the set speed is 8-12 m / min; when the wet thickness is 20-30 μm, the speed is set to 5-8 m / min.

[0044] Step 4: Lamination. Immediately after exiting the drying tunnel, use a laminating machine to laminate release materials on both sides, namely release layer 12 and release layer 2 13. During lamination, control the pressure (0.2-0.5MPa) and temperature (40-50℃) to ensure that the release layer and adhesive layer are tightly bonded, without bubbles or misalignment.

[0045] Step 5: Curing treatment. Curing temperature 40-50℃, curing humidity 40%-60%, curing time 24-72 hours. During the curing process, the curing agent in the adhesive reacts further with the resin to form a denser cross-linked structure, improving the tape's tack and temperature resistance, allowing the adhesive layer to fully cure, and enhancing its adhesion and weather resistance.

[0046] Step Six: Roll up the roll.

[0047] Step 7: Quality Inspection.

[0048] (1) Appearance inspection: Check the surface of the tape for bubbles, impurities, and adhesive dots using machine vision;

[0049] (2) Adhesion test: including initial tack, holding tack and peel strength test.

[0050] Examples of the above components are shown in the table below, where % represents weight percentage.

[0051]

[0052] In the component examples in the table above, the higher the content of thermally conductive powder, the better the thermal conductivity.

[0053] like Figure 2 As shown, the release layer 2 13 has several sets of tear zones, each tear zone consisting of an overlap portion 131 and an overlap portion 132 formed at opposite ends of the release layer 2 13, with the overlap portion 131 overlapping the overlap portion 132; the overlap portion 131 and the overlap portion 132 are formed by the following steps:

[0054] Step 1: When compositing release layer 2 13, a convex film 10 is formed on release layer 2 13 using composite component 3, such as... Figure 7 As shown.

[0055] Step 2: Use the cutting component 2 to cut the convex membrane 10, thereby forming an overlap portion 131 and an overlap portion 132 at the cut position.

[0056] Specifically, such as Figure 5 As shown, the composite component 3 described in step one includes a first conveyor roller group 31 and a second conveyor roller group 32. The adhesive layer 11 and the first release layer 12 are composited at the first conveyor roller group 31, and the adhesive layer 11 and the second release layer 13 are composited at the second conveyor roller group 32. A composite roller 33 and a pressure roller 34 capable of vertical movement are arranged between the first conveyor roller group 31 and the second conveyor roller group 32. A lifting roller 35 capable of horizontal movement is arranged between the composite roller 33 and the pressure roller 34, and the movement direction of the lifting roller 35 is perpendicular to the conveying direction of the tape 1. The second release layer 13 is conveyed forward from the bottom of the pressure roller 34 and the composite roller 33.

[0057] It should be noted that both conveyor roller group 1 31 and conveyor roller group 2 32 consist of two conveyor rollers. The tape 1 is conveyed from conveyor roller group 1 31 to conveyor roller group 2 32. At the position of conveyor roller group 1 31, the adhesive layer 11 and the release layer 12 are conveyed forward. After passing through conveyor roller group 1 31, the release layer 12 is laminated to the lower surface of the adhesive layer 11. The release layer 2 13 is conveyed from the bottom of the pressure roller 34 and the composite roller 33 to conveyor roller group 2 32, so that at the position of conveyor roller group 2 32, the release layer 2 13 is laminated to the upper surface of the adhesive layer 11.

[0058] The composite roller 33, pressure roller 34, and lifting roller 35 can all be driven by cylinders. When composite release layer 13 is being laminated, release layer 13 is pressed onto adhesive layer 11 at the position of composite roller 33. Lifting roller 35 is located below release layer 13. To form convex film 10, the cylinder first drives lifting roller 35 to move below release layer 13. Then, composite roller 33 moves upward, and pressure roller 34 moves downward, pressing release layer 13 onto adhesive layer 11. At this point, convex film 10 is formed at the position of lifting roller 35. After convex film 10 is formed, lifting roller 35 moves out of convex film 10. When convex film 10 is conveyed to the right side of composite roller 33, composite roller 33 moves downward again to press onto adhesive layer 11, and pressure roller 34 moves upward again. Subsequent formation of convex film 10 follows the above steps.

[0059] Specifically, such as Figure 3 and Figure 4 As shown, the cutting assembly 2 described in step two includes a bracket 20, a roller 21 mounted on the bracket 20, and a cutting component 22 mounted on one side of the bracket 20. The roller 21 is used for spirally winding the tape 1, and the cutting component 22 is used for cutting the convex film 10.

[0060] Furthermore, the roller 21 includes a main shaft 211, both ends of which are fixedly connected to the bracket 20. Both ends of the roller 21 are fitted with movable sleeves 210. Several connecting rods 212 are arranged in the circumferential direction of the main shaft 211. Both ends of each connecting rod 212 are connected to arms 213. The two ends of the connecting arms 213 are respectively hinged to the movable sleeves 210 and the ends of the connecting rods 212.

[0061] It should be noted that the movable sleeve 210 is fixed to the main shaft 211 by screws. The position of the movable sleeve 210 on the main shaft 211 can be adjusted by the screws. Thus, the movable sleeve 210 can drive the connecting rod 212 to move closer to or away from the main shaft 211 through the connecting arm 213, so that the diameter of the roller 21 increases or decreases.

[0062] Furthermore, the cutting component 22 includes a linear drive 221, a moving block 222 is mounted on the output end of the linear drive 221, a rod 223 is inserted into the moving block 222, and a blade 224 is mounted on the front end of the rod 223. The linear drive 221 is used to drive the blade 224 to move along the axial direction of the roller 21.

[0063] It should be noted that the linear drive 221 uses a lead screw and nut device, and the moving block 222 is installed on the nut of the linear drive 221. Thus, the linear drive 221 can drive the moving block 222 to move back and forth through the lead screw and nut. The insert rod 223 is installed on the moving block 222 by screws. The position of the insert rod 223 on the moving block 222 can be adjusted by screws so that the blade 224 is closer to or further away from the roller 21 to adapt to the change of the outer diameter of the roller 21.

[0064] Furthermore, each connecting rod 212 is provided with several pairs of baffles 214, and the tape 1 passes through the gaps between each pair of baffles 214 when it is wrapped around the roller 21.

[0065] In this embodiment, the implementation method is as follows: Before production, the diameter of the roller 21 and the position of the blade 224 are adjusted. The standard for adjusting the roller 21 is that after the tape 1 is wound around the roller 21, the convex membrane 10 located between two adjacent connecting rods 212 is on the same straight line. The standard for adjusting the blade 224 is that the blade 224 can cut the convex membrane 10. During production, the tape 1 with the convex membrane 10 is spirally wound around the outside of several connecting rods 212 of the roller 21, and the tape 1 passes through each pair of baffles 214. The tape 1 enters from one side and exits from the other side. A traction device is set at the output position to pull. During traction, one end of the tape 1 is continuously wound around the roller 21, and the other end is continuously pulled out from the traction surface of the roller 21. In order to make the tape 1 move more smoothly when winding around the roller 21, a rotatable sleeve can be fitted on the connecting rod 212 between the two baffles 214 to reduce friction. When it is necessary to cut the convex diaphragm 10, the linear drive 221 drives the blade 224 to move, cutting off all the convex diaphragms 10 on the same straight line.

[0066] like Figure 6 As shown, a fan 4 is provided behind the cutting assembly 2. The air outlet of the fan 4 is arranged along the output direction of the tape 1. A "V"-shaped guide plate 5 is provided in front of the air outlet of the fan 4. The tape 1 passes under the guide plate 5.

[0067] It should be noted that after the convex membrane 10 is cut, overlapping portion two 132 and overlapping portion one 131 are formed. To prevent overlapping portion one 131 and overlapping portion two 132 from pressing together, a fan 4 is installed. Figure 6As shown, overlapping part 2 132 rests on overlapping part 1 131. The air blown by the fan 4 blows overlapping part 1 131 upward and overlapping part 2 132 downward, so overlapping part 1 131 presses down on overlapping part 2 132. However, if overlapping part 1 131 rests on overlapping part 2 132, both overlapping parts 1 131 and overlapping part 2 132 are blown downward directly, in which case overlapping part 2 132 presses down on overlapping part 1 131. The air blown by the fan 4 is guided by both sides of the guide plate 5 and blown to both sides. The tape 1 passes under the guide plate 5.

[0068] Marking lines can be set on release layer 12, with the tear zone located in the middle of adjacent marking lines. When using, cut along the marking lines to achieve a fixed-length cut. When applying tape 1 to the LED light board, first cut tape 1 to a fixed length along the marking lines. Then align both ends of tape 1 with both ends of the LED light board, press tape 1 down, and peel off the overlap 131, applying it to the LED light board, that is, to the middle of the LED. Then slowly peel off the remaining parts of release layer 13 and apply them to the LED light board. Finally, peel off release layer 12 and apply it to the substrate to be bonded.

[0069] The above technical solution cuts the release layer 13 to form overlapping portions 132 of overlapping portions 131, allowing the tape 1 to be applied to the LED light board by first applying it to the middle and then gradually applying it from the middle to both ends. Since the elastic force of the tape 1 on both sides of the LED light board is independent and the elastic force is reduced, taking one side of the LED light board as an example (where the length of that side is half the total length), the elastic force on that side is also reduced. The shorter the length, the smaller the elastic force, and the smaller the deformation of the LED light board. Therefore, this method can significantly reduce the bending deformation of the LED light board, making it less likely to detach due to deformation after the LED light board is applied to the substrate.

[0070] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A thermally conductive adhesive tape, characterized in that: The tape (1) includes an adhesive layer (11) and release layer one (12) and release layer two (13) respectively laminated on both sides of the adhesive layer (11). The release layer two (13) has several sets of tear zones. The tear zones are composed of overlap portion one (131) and overlap portion two (132) formed at opposite ends of the release layer two (13). The overlap portion one (131) overlaps the overlap portion two (132). The adhesive layer (11) includes a substrate and an adhesive coated on both sides of the substrate. The first overlapping portion (131) and the second overlapping portion (132) are made by the following steps: Step 1: When composite release layer 2 (13), a convex film (10) is formed on release layer 2 (13) using composite component (3). Step 2: Use the cutting assembly (2) to cut the convex membrane (10), thereby forming an overlap part 1 (131) and an overlap part 2 (132) at the cut position.

2. The thermally conductive adhesive tape according to claim 1, characterized in that: The composite component (3) includes a first conveyor roller group (31) and a second conveyor roller group (32). The adhesive layer (11) and the first release layer (12) are composited at the first conveyor roller group (31), and the adhesive layer (11) and the second release layer (13) are composited at the second conveyor roller group (32). A composite roller (33) and a pressure roller (34) capable of vertical movement are arranged between the first conveyor roller group (31) and the second conveyor roller group (32). A lifting roller (35) capable of horizontal movement is arranged between the composite roller (33) and the pressure roller (34), and the moving direction of the lifting roller (35) is perpendicular to the conveying direction of the tape (1). The second release layer (13) is conveyed forward from the bottom of the pressure roller (34) and the composite roller (33).

3. The thermally conductive adhesive tape according to claim 1, characterized in that: The cutting assembly (2) includes a bracket (20), on which a roller (21) is mounted, and a cutting component (22) is mounted on one side of the bracket (20). The roller (21) is used for spirally winding tape (1), and the cutting component (22) is used for cutting the convex film (10).

4. The thermally conductive adhesive tape according to claim 3, characterized in that: The roller (21) includes a main shaft (211), both ends of which are fixedly connected to the bracket (20). Both ends of the roller (21) are fitted with movable sleeves (210). Several connecting rods (212) are arranged in the circumferential direction of the main shaft (211). Both ends of each connecting rod (212) are connected to arms (213). The two ends of the connecting arms (213) are respectively hinged to the ends of the movable sleeves (210) and the connecting rods (212).

5. The thermally conductive adhesive tape according to claim 4, characterized in that: Each of the connecting rods (212) is provided with a plurality of pairs of baffles (214), and the tape (1) passes between each pair of baffles (214) when it is wound around the roller (21).

6. The thermally conductive adhesive tape according to claim 4, characterized in that: The cutting component (22) includes a linear drive (221), a moving block (222) is installed at the output end of the linear drive (221), a rod (223) is inserted into the moving block (222), and a blade (224) is installed at the front end of the rod (223). The linear drive (221) is used to drive the blade (224) to move along the axis of the roller (21).

7. The thermally conductive adhesive tape according to claim 1, characterized in that: A fan (4) is provided behind the cutting assembly (2). The air outlet of the fan (4) is arranged along the output direction of the tape (1). A "V"-shaped guide plate (5) is provided in front of the air outlet of the fan (4). The tape (1) passes under the guide plate (5).

8. A method for preparing a thermally conductive adhesive tape as described in any one of claims 1-7, characterized in that, Includes the following steps: Step 1: Adhesive preparation. Add resin, thermally conductive powder, tackifier, curing agent, dispersant, and antioxidant according to the formula. Turn on the reactor and stir to form a uniform adhesive solution. Step 2: Degassing. Add the adhesive solution to a vacuum degassing tank and let it stand for 30-60 minutes to remove air bubbles from the solution. Step 3: Coating. The prepared adhesive solution is applied to the substrate surface twice using a coating machine. After each application, the adhesive solution is dried and cured to set and form an adhesive layer (11). Step 4: Lamination. Using a laminating machine, release layer 1 (12) and release layer 2 (13) are laminated onto both sides of the adhesive layer (11).

9. The method for preparing a thermally conductive adhesive tape according to claim 8, characterized in that: When the second release layer (13) is composited, a convex film (10) is formed on the second release layer (13) using a composite component (3), and the convex film (10) is cut using a cutting component (2), thereby forming an overlap portion one (131) and an overlap portion two (132) at the cut position.

10. The method for preparing a thermally conductive adhesive tape according to claim 8, characterized in that: After composite release layer one (12) and release layer two (13), the tape (1) is cured to cure the adhesive on both sides of the adhesive layer (11).

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