Enhanced encapsulation tape

Abstract

The utility model provides a reinforced packaging adhesive tape, including adhesive tape body, adhesive tape body includes fluorine coating, base material layer, nanometer fiber transition layer and cement layer, base material layer includes polyimide perfusion layer, carbon fiber braided layer and metal foil, carbon fiber braided layer's surface perfuses polyamide acid solution, forms polyimide perfusion layer through gradient temperature imidization, the surface of polyimide perfusion layer is equipped with fluorine coating, and the other surface edge of polyimide perfusion layer inserts metal foil, the side of polyimide perfusion layer embedding metal foil is equipped with nanometer fiber transition layer, and the other side of nanometer fiber transition layer is equipped with cement layer, the utility model base material layer can provide rigid support, prevents edge peeling, and polyimide nanometer fiber filling layer absorbs local stress through laser etching honeycomb hole structure, after filling polyimide nanometer fiber in honeycomb hole, the bending stiffness promotes, effectively avoids the edge of adhesive tape when using to rise, enhances overall performance.

Description

Technical Field

[0001] This utility model relates to the field of adhesive tape technology, specifically to an enhanced packaging adhesive tape. Background Technology

[0002] Encapsulation tape is a general-purpose encapsulation material. Encapsulation tape must meet the stringent requirements of high-precision fields such as electronic packaging, automotive components, and aerospace for high-strength fixation, resistance to environmental aging, and shock absorption; its main purpose is to achieve sealing to isolate the external environment.

[0003] Typically, tape consists of a substrate and an adhesive layer. When the tape substrate (such as polyimide CTE (coefficient of thermal expansion) ≈ 20 ppm / ℃) is used, its coefficient of thermal expansion is different from that of the bonding substrate (such as aluminum CTE ≈ 23 ppm / ℃, ceramic CTE ≈ 7 ppm / ℃). When the temperature changes, shear stress is generated at the interface, making the edges of the tape free ends. The stress cannot diffuse to the center, causing the edges to peel and lift, and the sealing effect is easily lost over time. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an enhanced encapsulation tape that solves the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An enhanced encapsulation tape includes a tape body comprising a fluorine coating, a substrate layer, a nanofiber transition layer, and an adhesive layer; the substrate layer comprises a polyimide infusion layer, a carbon fiber braided layer, and a metal foil; the surface of the carbon fiber braided layer is infused with a polyamic acid solution and imidized by gradient heating to form the polyimide infusion layer; the surface of the polyimide infusion layer is provided with a fluorine coating, and a metal foil is embedded at the edge of another surface of the polyimide infusion layer; a nanofiber transition layer is provided on the side of the polyimide infusion layer where the metal foil is embedded; and an adhesive layer is provided on the other side of the nanofiber transition layer.

[0007] Furthermore, the surface of the substrate layer is laser-etched to form honeycomb holes, and the honeycomb holes are filled with polyimide nanofibers to form a polyimide nanofiber filling layer.

[0008] Furthermore, the nanofiber transition layer is coated with a coupling agent on both sides, and the density of the coupling agent coated on the contact surface between the nanofiber transition layer and the substrate layer is higher than that on the other side.

[0009] Furthermore, the adhesive layer has a serrated or wavy shape at both edges of the adhesive surface; and the adhesive layer includes a conductive adhesive layer, a damping interlayer, and a pressure-sensitive adhesive layer that are sequentially bonded together.

[0010] Furthermore, it also includes an inner tube of tape, with the tape body wound around the outside of the inner tube of tape; the inner tube of tape includes a tube body, a fixed plate and a rotating shaft; the fixed plate is fixed at the center of the tube body, and the rotating shaft is rotatably connected at the center of the fixed plate.

[0011] Furthermore, the inner tube of the tape is provided with a self-breaking assembly on its side, and the self-breaking assembly includes an extension rod, a roller, a vertical plate, an outlet, a pressing block, a spring, a moving wheel, an inclined block, and a blade; extension rods are fixed on both sides of the rotating shaft, and a vertical plate is fixed between the extension rods; the roller is rotatably connected to the side of the vertical plate, and an outlet is opened on the side of the vertical plate; an inclined block is slidably connected inside the vertical plate, and a moving wheel is provided at the bottom end of the inclined block; a blade is fixed to the side of the inclined block, and the blade is connected to the outlet; a pressing block is slidably connected to the side of the vertical plate, and the pressing block is connected to the inclined block; the pressing block and the interior of the vertical plate are connected by a spring.

[0012] Furthermore, the mating surfaces of the inclined block and the pressing block are inclined, and the bottom end of the inclined block is provided with multiple moving wheels; the moving wheels roll in the grooves opened inside the vertical plate.

[0013] This invention provides an enhanced encapsulation tape. Compared with the prior art, it has the following advantages:

[0014] 1. The carbon fiber braided layer and metal foil adjust the overall CTE to be close to that of the metal / ceramic substrate. With the metal foil edge embedded, it can provide rigid support and prevent edge peeling. The polyimide nanofiber filling layer absorbs local stress through laser-etched honeycomb structure. After the honeycomb is filled with polyimide nanofiber, the bending stiffness is improved. It effectively avoids the edge lifting of the tape during use and enhances the overall performance.

[0015] 2. The nanofiber transition layer mechanically interlocks the substrate and adhesive layer, and is coated with coupling agent on both sides, which improves the interfacial bonding strength; in addition, the toothed structure at the edge of the adhesive layer transforms the linear peeling force at the edge into a multi-point dispersion force, thereby reducing the stress peak and further preventing edge lifting.

[0016] 3. The self-cutting component allows for the cutting of tape without the need for external equipment, making it convenient to use. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the tape body structure of this utility model is shown;

[0019] Figure 2 A top view of the substrate layer structure of this utility model is shown;

[0020] Figure 3 A schematic diagram of the tape body and tape inner cylinder structure of this utility model is shown;

[0021] Figure 4 A schematic diagram of the self-segment component structure of this utility model is shown;

[0022] Figure 5 A schematic diagram of the internal structure of the vertical plate of this utility model is shown;

[0023] Figure 6 A schematic diagram of the structure of this utility model in use is shown;

[0024] The diagram shows: 1. Fluorine coating; 2. Substrate layer; 21. Polyimide infusion layer; 22. Carbon fiber braided layer; 23. Metal foil; 3. Nanofiber transition layer; 4. Adhesive layer; 41. Conductive adhesive layer; 42. Damping interlayer; 43. Pressure-sensitive adhesive layer; 5. Polyimide nanofiber filling layer; 6. Tape inner cylinder; 61. Cylinder body; 62. Fixing disc; 63. Rotating shaft; 7. Self-breaking component; 71. Outer rod; 72. Roller; 73. Vertical plate; 74. Outlet; 75. Pressing block; 76. Spring; 77. Moving wheel; 78. Inclined block; 79. Blade. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] Example

[0027] To address the technical issues in the background section, an enhanced encapsulation tape is provided, primarily for use in high-precision industries, including electronic packaging, power battery module bonding, and satellite solar panel bonding.

[0028] Combination Figures 1-5As shown, this utility model provides an enhanced encapsulation tape, comprising a tape body, which includes a fluorine coating 1, a substrate layer 2, a nanofiber transition layer 3, and an adhesive layer 4. The substrate layer 2 includes a polyimide infusion layer 21, a carbon fiber braided layer 22, and a metal foil 23. The surface of the carbon fiber braided layer 22 is infused with a polyamic acid solution and imidized by gradient heating to form the polyimide infusion layer 21. The carbon fiber braided layer 22 serves as the main load-bearing layer, providing high strength (tensile strength ≥ 500 MPa) and low thermal expansion (CTE ≤ 5 ppm / ℃). It is made using a twill weave process (e.g., 2×2 twill), with a fiber bundle spacing of 100-200 μm, forming a porous skeleton. Carbon fiber specifications: T700 grade, single filament diameter 7 μm, and a thickness of 25-50 μm after weaving. The polyimide infusion layer 21 fills the pores of the carbon fiber braided layer 22, forming a honeycomb wall and enhancing Z-axis stiffness and compressive strength (≥ 200 MPa). It is formed by injecting polyamic acid solution into the carbon fiber braided layer 22 and imidizing it with gradient temperature (curing at 300℃).

[0029] To further improve Z-axis compressive strength and anti-delamination performance (interfacial shear strength increased by 40%), the surface of the substrate layer 2 is laser-etched to form honeycomb pores, and the honeycomb pores are filled with polyimide nanofibers to form a polyimide nanofiber filling layer 5. Specifically, regular hexagonal pores (pore diameter 50-200μm) are formed after curing by template method or laser etching; polyimide nanofibers (diameter 100nm, length 10-50μm) are directionally deposited in the honeycomb pores; the filling density is controlled: porosity 30%-50% (too dense will reduce flexibility).

[0030] The surface of the polyimide infusion layer 21 is provided with a fluorine coating 1, the thickness of which is 3-5 μm. The PTFE fluorine coating 1 contains nano-Al2O3 particles with a roughness Ra=0.8 μm. The fluorine coating 1 can improve weather resistance (UV / chemical corrosion resistance) and prevent dirt adhesion.

[0031] A metal foil 23 is embedded at the edge of another surface of the polyimide infusion layer 21; the metal foil 23 (20μm×5mm) is embedded into the edge of the substrate layer 2 by laser welding, increasing the edge flexural modulus from 5GPa to 50GPa, thus resisting peel stress. Test data: the edge warping resistance reaches 15N / 25mm (ASTM D3330), which is 300% higher than the foil-free design.

[0032] To enhance the interfacial bonding between the substrate and the adhesive layer, a nanofiber transition layer 3 is provided on the side of the polyimide infusion layer 21 embedded in the metal foil 23; and an adhesive layer 4 is provided on the other side of the nanofiber transition layer 3. Both sides of the nanofiber transition layer 3 are coated with a coupling agent, specifically a silane coupling agent (KH-550 / KH-560); and the density of the coupling agent coated on the contact surface between the nanofiber transition layer 3 and the substrate layer 2 is higher than that on the other side. Specifically, the fiber density is higher (80%) on the side closer to the substrate and lower (50%) on the adhesive layer side, balancing bonding strength and flexibility.

[0033] The adhesive layer 4 has a serrated or wavy shape formed at both edges of the adhesive surface, specifically formed by precision cutting with an ultraviolet laser; and the adhesive layer 4 includes a conductive adhesive layer 41, a damping interlayer 42, and a pressure-sensitive adhesive layer 43 that are sequentially bonded together. The serrated structure transforms the linear peeling force at the edge into a multi-point dispersed force, thereby reducing the stress peak.

[0034] To facilitate the cutting and pasting of the tape, an inner tape tube 6 is also included, and the tape body is wrapped around the outside of the inner tape tube 6. The inner tape tube 6 includes a tube body 61, a fixing plate 62 and a rotating shaft 63. The fixing plate 62 is fixed at the center of the tube body 61, and the rotating shaft 63 is rotatably connected at the center of the fixing plate 62.

[0035] The inner tube 6 of the tape is provided with a self-breaking component 7 on its side, and the self-breaking component 7 includes an extension rod 71, a roller 72, a vertical plate 73, an outlet 74, a pressing block 75, a spring 76, a moving wheel 77, an inclined block 78, and a blade 79; the two sides of the rotating shaft 63 are fixed with extension rods 71, and the vertical plate 73 is fixed between the extension rods 71; the side of the vertical plate 73 is rotatably connected to the roller 72, and the side of the vertical plate 73 has an outlet 74; the inclined block 78 is slidably connected inside the vertical plate 73, and the bottom end of the inclined block 78 is provided with a moving wheel 77; the side of the inclined block 78 is fixed with a blade 79, and the blade 79 is connected to the outlet 74; the side of the vertical plate 73 is slidably connected with the pressing block 75, and the pressing block 75 is connected to the inclined block 78; the pressing block 75 and the interior of the vertical plate 73 are connected by a spring 76. The mating surfaces of the inclined block 78 and the pressing block 75 are inclined, and the bottom end of the inclined block 78 is provided with multiple moving wheels 77; the moving wheels 77 roll in the grooves opened inside the vertical plate 73.

[0036] When using the tape, for example, the left hand uses the thumb and middle finger to fix it on both sides of the rotating shaft 63, while the right hand pulls the free end of the tape body, causing the tape body, the cylinder 61, and the fixing plate 62 to rotate around the rotating shaft 63, thus stretching the free end of the tape. The portion of the tape body to be used is pulled out until the required length is reached. Then, the index finger presses the pressing block 75, which compresses the spring 76 and causes the inclined block 78 to move to the left, exposing the blade 79 from the outlet 74. Figure 6 As shown, at this time, bring the tape body close to the blade 79 and force it to adhere to the blade 79 to cut the tape.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0038] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An enhanced encapsulation tape, characterized by: The tape body includes a fluorine coating (1), a substrate layer (2), a nanofiber transition layer (3), and an adhesive layer (4). The substrate layer (2) includes a polyimide infusion layer (21), a carbon fiber braided layer (22), and a metal foil (23). The surface of the carbon fiber braided layer (22) is infused with a polyamic acid solution and imidized by gradient heating to form the polyimide infusion layer (21). The surface of the polyimide infusion layer (21) is provided with a fluorine coating (1), and a metal foil (23) is embedded at the edge of the other surface of the polyimide infusion layer (21). The side of the polyimide infusion layer (21) embedded with the metal foil (23) is provided with a nanofiber transition layer (3). The other side of the nanofiber transition layer (3) is provided with an adhesive layer (4).

2. The reinforced encapsulation tape of claim 1, wherein: The surface of the substrate layer (2) is formed with honeycomb holes by laser etching, and the honeycomb holes are filled with polyimide nanofibers to form a polyimide nanofiber filling layer (5).

3. The reinforced encapsulation tape of claim 1, wherein: The nanofiber transition layer (3) is coated with coupling agent on both sides, and the density of the coupling agent coated on the contact surface between the nanofiber transition layer (3) and the substrate layer (2) is higher than that on the other side.

4. The reinforced encapsulation tape of claim 1, wherein: The adhesive layer (4) has a sawtooth or wavy shape at both sides of the adhesive surface; and the adhesive layer (4) includes a conductive adhesive layer (41), a damping interlayer (42) and a pressure-sensitive adhesive layer (43) that are bonded together in sequence.

5. A reinforced encapsulating tape according to any one of claims 1-4, characterized in that: It also includes a tape inner tube (6), the tape body is wrapped around the outside of the tape inner tube (6); the tape inner tube (6) includes a tube body (61), a fixed plate (62) and a rotating shaft (63); the fixed plate (62) is fixed at the center of the tube body (61), and the rotating shaft (63) is rotatably connected at the center of the fixed plate (62).

6. The reinforced encapsulation tape of claim 5, wherein: The inner tube (6) of the tape is provided with a self-breaking component (7) on its side, and the self-breaking component (7) includes an extension rod (71), a roller (72), a vertical plate (73), an outlet (74), a pressing block (75), a spring (76), a moving wheel (77), a wedge (78), and a blade (79); the two sides of the rotating shaft (63) are fixed with extension rods (71), and the vertical plate (73) is fixed between the extension rods (71); the side of the vertical plate (73) is rotatably connected to the roller (72), and the vertical plate (74) is rotatably connected to the roller (72). 3) An outlet (74) is opened on the side; a slidable block (78) is connected inside the vertical plate (73), and a moving wheel (77) is provided at the bottom of the slidable block (78); a blade (79) is fixed on the side of the slidable block (78), and the blade (79) is connected to the outlet (74); a pressing block (75) is slidably connected to the side of the vertical plate (73), and the pressing block (75) is connected to the slidable block (78); the pressing block (75) is connected to the inside of the vertical plate (73) by a spring (76).

7. The reinforced encapsulation tape of claim 6, wherein: The mating surfaces of the inclined block (78) and the pressing block (75) are inclined, and the bottom end of the inclined block (78) is provided with multiple moving wheels (77); the moving wheels (77) roll in the grooves opened inside the vertical plate (73).

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