Thermally conductive adhesive tape and method of making same

Abstract

The application discloses a heat-conducting adhesive tape and a preparation method thereof, and particularly relates to the field of heat-conducting adhesive tapes. The heat-conducting adhesive tape comprises a tape, the tape comprises an adhesive layer and release layers one and two respectively compounded on two sides of the adhesive layer, the release layer two is provided with a plurality of groups of tear zones, the tear zone is composed of a lap portion one and a lap portion two formed at opposite ends of the release layer two, the lap portion one is lapped on the lap portion two, and the adhesive layer comprises a base material and an adhesive agent coated on two sides of the base material. The lap portion one and the lap portion two are formed to be lapped with each other, so that when the tape is pasted on an LED lamp panel, the middle part can be pasted first, and then the two ends are pasted gradually from the middle part. Since the influence of tape rebound force on both sides of the LED lamp panel is independent and the rebound force is reduced, the bending deformation of the LED lamp panel can be greatly reduced by the method, and the LED lamp panel is not easy to fall off due to deformation after being pasted on a base plate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat-conducting adhesive tape, in particular to a heat-conducting adhesive tape and a preparation method thereof. BACKGROUND

[0002] The heat-conducting adhesive tape is a kind of adhesive tape designed for heat transfer and adhesive function, wherein high-thermal-conductivity material is added to help the rapid transfer of heat energy, and the use of fixing screws can be omitted through the adhesive effect of the adhesive tape to avoid the problem of uneven temperature caused by fastening position.

[0003] Due to the viscoelasticity of the adhesive tape itself, the micro gap between the contact interface can be fully filled to exclude air to achieve effective heat conduction. It is mainly used for heat conduction between power supply templates and heat sinks and the adhesion and heat dissipation of LED lamp panels.

[0004] The heat-conducting adhesive tape has a double-layer bonding structure, and its basic structure is in the form of release layer + adhesive layer + base material layer + adhesive layer + release layer. When adhering, first tear off one layer of release layer, adhere the base material layer to the electronic device, and then tear off the other layer of release layer and adhere to the heat dissipation device or substrate.

[0005] When adhering the LED lamp panel, the LED lamp panel is in a strip shape and has a certain elasticity. The current adhesive tape can only be pasted from one end to the other end, or the appropriate length of the adhesive tape is torn off and pasted from both ends to the middle. When pasting, the adhesive tape is stretched, and after pasting, due to the elastic force of the adhesive tape itself, the LED lamp panel is easily bent and deformed. After the LED lamp panel is pasted on the substrate, it is easy to fall off due to deformation. SUMMARY

[0006] The present application provides a heat-conducting adhesive tape and a preparation method thereof, which solves the problem that the adhesive tape is stretched when pasted on the LED lamp panel, and after pasting, due to the elastic force of the adhesive tape itself, the LED lamp panel is easily bent and deformed, and after the LED lamp panel is pasted on the substrate, it is easy to fall off due to deformation.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a heat-conducting adhesive tape, comprising an adhesive tape, the adhesive tape comprising an adhesive layer and release layer one and release layer two respectively compounded on both sides of the adhesive layer, the release layer two having a plurality of groups of tear zones, the tear zone being composed of a lap portion one and a lap portion two formed at opposite ends of the release layer two, the lap portion one being lapped on the lap portion two, wherein the adhesive layer comprises a base material and an adhesive agent coated on both sides of the base material;

[0008] The lap portion one and the lap portion two are made by the following steps:

[0009] Step one: when the composite release layer two, using composite components on the release layer two form convex film;

[0010] Step two: using cutting components cut off the convex film, thereby forming lap one and lap two at the cutting position.

[0011] Preferably, the composite assembly comprises a conveying roller group one and a conveying roller group two, the adhesive layer and the release layer one are compounded at the conveying roller group one, the adhesive layer and the release layer two are compounded at the conveying roller group two, a composite roller and a compression roller capable of vertical movement are arranged between the conveying roller group one and the conveying roller group two, a lifting roller capable of horizontal movement is arranged between the composite roller and the compression roller, the moving direction of the lifting roller is perpendicular to the direction of the adhesive tape conveying, and the release layer two is conveyed from the bottom of the compression roller and the composite roller.

[0012] Preferably, the cutting assembly comprises a support, a roller is mounted on the support, a cutting component is mounted on one side of the support, the roller is used for spirally winding the adhesive tape, and the cutting component is used for cutting the convex film.

[0013] Preferably, the roller comprises a main shaft, both ends of the main shaft are fixedly connected with the support, both ends of the roller are sleeved with a moving sleeve, a plurality of connecting rods are arranged in the circumferential direction of the main shaft, both ends of each connecting rod are connected with an arm, and both ends of the arm are hingedly connected with the moving sleeve and the end of the connecting rod.

[0014] Preferably, a plurality of pairs of blocking pieces are arranged on each connecting rod, and the adhesive tape passes between each pair of blocking pieces when being wound on the roller.

[0015] Preferably, the cutting component comprises a linear drive, a moving block is mounted at the output end of the linear drive, a plug rod is inserted into the moving block, a blade is mounted at the front end of the plug rod, and the linear drive is used for driving the blade to move along the axial direction of the roller.

[0016] Preferably, a fan is arranged at the rear of the cutting assembly, the air outlet of the fan is arranged along the output direction of the adhesive tape, a V-shaped flow guide plate is arranged in front of the air outlet of the fan, and the adhesive tape passes below the flow guide plate.

[0017] The application also provides a preparation method of the heat-conducting adhesive tape, comprising the following steps:

[0018] Step one: adhesive preparation, according to the formula, adding resin, heat-conducting powder, tackifier, curing agent, dispersant and antioxidant, opening the reaction kettle to stir to form a uniform adhesive solution;

[0019] Step two: degassing, adding the adhesive solution into a vacuum degassing tank and standing for 10 minutes to remove the bubbles in the solution;

[0020] Step three: coating, using a coating machine to coat the prepared adhesive solution on the surface of the substrate twice, after each coating, drying and curing to shape the adhesive solution to form an adhesive layer;

[0021] Step four: compounding, using a compounding machine to compound release layer one and release layer two on both sides of the adhesive layer.

[0022] Preferably, when compounding release layer two, a convex film is formed on release layer two using a compounding assembly, and the convex film is cut off using a cutting assembly, thereby forming lap portion one and lap portion two at the cut-off position.

[0023] Preferably, after compounding release layer one and release layer two, the adhesive tape is aged to cure the adhesive on both sides of the adhesive layer.

[0024] The technical effects and advantages of the present application are:

[0025] The present application cuts release layer two to form lap portion one and lap portion two that lap each other, so that when the adhesive tape is pasted on the LED lamp panel, the middle can be pasted first, and then gradually pasted from the middle to both ends. Since the two sides of the LED lamp panel are independently affected by the tape rebound force and the rebound force is reduced, this method can greatly reduce the bending deformation of the LED lamp panel, and the LED lamp panel is not easy to fall off due to deformation after being pasted on the substrate. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 The preparation method flow chart of the heat-conducting adhesive tape of the present application;

[0027] Figure 2 The structure schematic diagram of the adhesive tape of the present application;

[0028] Figure 3 The structure schematic diagram of the cutting assembly of the present application;

[0029] Figure 4 The top view of the cutting assembly of the present application;

[0030] Figure 5 The structure schematic diagram of the compounding assembly of the present application;

[0031] Figure 6 The schematic diagram of the fan and the guide plate of the present application;

[0032] Figure 7 The schematic diagram of the convex film of the present application.

[0033] The reference signs are: 1, adhesive tape; 10, convex film; 11, adhesive layer; 12, release layer one; 13, release layer two; 131, lap one; 132, lap two; 2, cutting assembly; 20, bracket; 21, roller; 210, moving sleeve; 211, main shaft; 212, connecting rod; 213, connecting arm; 214, baffle; 22, cutting component; 221, linear drive; 222, moving block; 223, insertion rod; 224, blade; 3, composite assembly; 31, conveying roller group one; 32, conveying roller group two; 33, composite roller; 34, compression roller; 35, pulling roller; 4, fan; 5, flow guide plate. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0035] Referring to the drawings in the description Figures 1-2 A heat-conducting adhesive tape includes an adhesive tape 1, which includes an adhesive layer 11 and release layers one 12 and two 13 respectively compounded on both sides of the adhesive layer 11. The adhesive layer 11 includes a base material and an adhesive coated on both sides of the base material.

[0036] The preparation method of the heat-conducting adhesive tape described above, as shown in Figure 1 includes the following steps:

[0037] Step one: adhesive preparation. According to the formula, add resin, heat-conducting powder, tackifier, curing agent, dispersant, and antioxidant, start the reaction kettle and stir (speed 300-500 rpm), control the temperature at 60-80℃, react for 2-4 hours, form a uniform adhesive solution, control the viscosity at 500-2000 cP, and ensure smooth subsequent coating.

[0038] The resin uses acrylate monomer, the mass ratio is 20%-40%, the heat-conducting powder uses aluminum oxide or BN ceramic particles, the mass ratio is 35%-60%, the tackifier uses rosin resin or terpene resin, the mass ratio is 5%-15%, the viscosity is improved, the curing agent uses isocyanate, the mass ratio is 2%-5%, the hardness of the adhesive layer is enhanced, the dispersant uses silane coupling agent KH550, the mass ratio is 1%-3%, and the antioxidant uses hindered phenol, the mass ratio is 0.5%-2%.

[0039] Step two: defoaming, using a vacuum defoaming tank (vacuum degree -0.08 to -0.09 MPa), standing for 30-60 minutes to remove the bubbles in the solution, preventing the glue layer from appearing holes after coating to affect the adhesion.

[0040] Step three: coating. First coating (single-side coating of the substrate): using a coating machine to coat the prepared adhesive on the surface of the substrate; second coating (coating the other side of the substrate): using a coating machine to coat the prepared adhesive on the surface of the substrate; after each coating, drying and curing are performed to shape the adhesive solution and form the adhesive layer 11.

[0041] When the substrate is a non-woven fabric, a micro-concave roller coating method is used, the gap between the doctor blade and the substrate is adjusted (10-30 μm, corresponding to the dry thickness of the glue layer of 5-15 μm), and the doctor blade angle is 30-45°; the substrate advances with the guide roller (speed 5-10 m / min), and the doctor blade coats the adhesive in the glue tank on the surface of the substrate, and the excess adhesive flows back to the glue tank.

[0042] When the substrate is a thin film (PET / PP), a doctor blade coating method is used, and a micro-concave roller with a network pattern on the surface (network hole depth 20-40 μm) is selected; after the roller surface is immersed in the adhesive, the excess adhesive is scraped off by the doctor blade, and only the adhesive in the network hole is retained; the line pressure between the micro-concave roller and the substrate is 0.1-0.2 MPa, and the adhesive is transferred to the surface of the substrate, which is suitable for thin glue layer (dry thickness 3-10 μm).

[0043] After the first coating and the second coating, drying and curing are needed to shape the glue layer to form the adhesive layer 11. During shaping, the coated substrate is manually pulled through the deviation roller at the entrance of the drying tunnel, and the process needs to avoid friction between the edge of the glue layer and the inner wall of the tunnel. Start the conveying system, and the initial speed is set to 50% of the normal speed; after the substrate is stable in the middle section, gradually increase to the set speed. The set speed is adjusted according to the wet thickness of the glue layer to ensure that the substrate stays in the tunnel for a certain time (i.e. drying time, generally 3-5 minutes) to meet the solvent removal requirements. When the wet thickness of the glue layer is 10-20 μm, the set speed is 8-12 m / min; when the wet thickness of the glue layer is 20-30 μm, the speed is set to 5-8 m / min.

[0044] Step four: compounding. Immediately after output from the drying tunnel, use the compounding machine to compound the release materials, i.e. release layer one 12 and release layer two 13, on both sides respectively; control the pressure (0.2-0.5 MPa) and temperature (40-50 °C) during compounding to ensure that the release layer is tightly attached to the glue layer without bubbles or deviation.

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

[0046] Step six: winding.

[0047] Step seven: quality inspection.

[0048] (1) Appearance inspection: check the tape surface for bubbles, impurities, and glue spots through machine vision.

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

[0050] The above components are implemented as shown in the following table, where % is the weight percentage.

[0051]

[0052] In the above component examples, the higher the content of the heat-conducting powder, the better the heat-conducting performance.

[0053] As shown in Figure 2 , the release layer two 13 has a plurality of tear zones, which are composed of the lap portion one 131 and the lap portion two 132 formed at the opposite ends of the release layer two 13, and the lap portion one 131 is lapped on the lap portion two 132; the lap portion one 131 and the lap portion two 132 are made by the following steps:

[0054] Step one: when the composite release layer two 13 is formed, the composite assembly 3 is used to form the convex film 10 on the release layer two 13, as shown in Figure 7 .

[0055] Step two: the convex film 10 is cut off using the cutting assembly 2, thereby forming the lap portion one 131 and the lap portion two 132 at the cut-off position.

[0056] Specifically, as shown in Figure 5 , the composite assembly 3 of step one includes the conveying roller set one 31 and the conveying roller set two 32, the adhesive layer 11 and the release layer one 12 are compounded at the conveying roller set one 31, the adhesive layer 11 and the release layer two 13 are compounded at the conveying roller set two 32, the composite roller 33 and the compression roller 34 capable of moving vertically are arranged between the conveying roller set one 31 and the conveying roller set two 32, the lifting roller 35 capable of moving horizontally is arranged between the composite roller 33 and the compression roller 34, the moving direction of the lifting roller 35 is perpendicular to the direction of the tape 1 conveying, and the release layer two 13 is conveyed forward from the bottom of the compression roller 34 and the composite roller 33.

[0057] It should be noted that the conveying roller set one 31 and the conveying roller set two 32 are both composed of two conveying rollers, the adhesive tape 1 is conveyed from the conveying roller set one 31 to the conveying roller set two 32, at the position of the conveying roller set one 31, the adhesive layer 11 and the release layer one 12 are conveyed forward, after passing through the conveying roller set one 31, the release layer one 12 is compounded to the lower surface of the adhesive layer 11, the release layer two 13 is conveyed from the bottom of the compression roller 34 and the compounding roller 33 to the conveying roller set two 32, so that at the position of the conveying roller set two 32, the release layer two 13 is compounded to the upper surface of the adhesive layer 11.

[0058] The compounding roller 33, the compression roller 34 and the pulling roller 35 can all be driven by air cylinders, when the release layer two 13 is compounded, the release layer two 13 is pressed on the adhesive layer 11 at the position of the compounding roller 33, the pulling roller 35 is located at the position of one side below the release layer two 13, when the convex film 10 is to be formed, first, the air cylinder drives the pulling roller 35 to move below the release layer two 13, then the compounding roller 33 moves upward, the compression roller 34 moves downward, the compression roller 34 presses the release layer two 13 on the adhesive layer 11, at this time, the convex film 10 is formed at the position of the pulling roller 35. After the convex film 10 is formed, the pulling roller 35 moves out of the convex film 10, when the convex film 10 is conveyed to the right side of the position of the compounding roller 33, the compounding roller 33 moves downward to press on the adhesive layer 11 again, and the compression roller 34 moves upward again. The formation of the subsequent convex film 10 is carried out according to the above steps.

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

[0060] Further, the roller 21 includes a main shaft 211, both ends of the main shaft 211 are fixedly connected with the support 20, both ends of the roller 21 are sleeved with a moving sleeve 210, a plurality of connecting rods 212 are arranged in the circumferential direction of the main shaft 211, both ends of each connecting rod 212 are connected with an arm 213, and both ends of the arm 213 are hingedly connected with the moving sleeve 210 and the end of the connecting rod 212.

[0061] It should be noted that the moving sleeve 210 is fixed on the main shaft 211 by a screw, the position of the moving sleeve 210 on the main shaft 211 can be adjusted by the screw, so that the moving sleeve 210 can drive the connecting rod 212 to move in the direction of approaching or moving away from the main shaft 211 through the connecting arm 213, so as to increase or decrease the diameter of the roller 21.

[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, the lap portion two 132 is on the lap portion one 131, the wind blown by the fan 4 blows the lap portion one 131 upward, and the lap portion two 132 downward, so that the lap portion one 131 is pressed on the lap portion two 132. If the lap portion one 131 is on the lap portion two 132, the lap portion one 131 and the lap portion two 132 can be directly blown downward, at this time, the lap portion two 132 is pressed on the lap portion one 131. The wind blown by the fan 4 is guided through both sides of the guide plate 5 and then blown to both sides. The adhesive tape 1 passes below the guide plate 5.

[0068] The demolding layer one 12 can be provided with a mark line, and the tearing zone is located at the middle position of adjacent mark lines, and the length cutting purpose is achieved by cutting along the mark line in use. When the adhesive tape 1 is pasted on the LED lamp plate, the adhesive tape 1 is first cut into a fixed length along the mark line, then the two ends of the adhesive tape 1 are aligned with the two ends of the LED lamp plate, the adhesive tape 1 is pressed, the lap portion one 131 is torn and pasted on the LED lamp plate, that is, pasted on the middle position of the LED, then the other part of the demolding layer two 13 is gradually torn and pasted on the LED lamp plate. Finally, the demolding layer one 12 is torn and pasted on the substrate to be pasted.

[0069] The above technical solution cuts the demolding layer two 13 to form the lap portion two 132 of the lap portion one 131, so that when the adhesive tape 1 is pasted on the LED lamp plate, the middle part can be pasted first, and then the two ends are gradually pasted from the middle. Since the influence of the elastic force of the adhesive tape 1 on both sides of the LED lamp plate is independent and the elastic force is reduced, taking one side of the LED lamp plate as an example, the length of this side is half of the total length, and the elastic force of this side is also reduced. The shorter the length, the smaller the elastic force, and the smaller the deformation of the LED lamp plate. Therefore, by this way, the bending deformation of the LED lamp plate can be greatly reduced, and the LED lamp plate is not easy to fall off due to deformation after being pasted on the substrate.

[0070] Finally, the above only describes the preferred embodiments of the present application and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for preparing 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. 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. Use a laminating machine to laminate release layer 1 (12) and release layer 2 (13) onto both sides of the adhesive layer (11). 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. 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). 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). 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); After the tape (1) is wrapped around the roller (21), the convex membrane (10) located between two adjacent connecting rods (212) is on the same straight line; 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). 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).

2. The method for preparing a 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).

3. The method for preparing a thermally conductive adhesive tape according to claim 1, 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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