Self-exhausting shading double-sided adhesive tape

Abstract

The utility model discloses a self-exhausting shading double-sided adhesive tape, which comprises a first adhesive layer, a second adhesive layer, a third adhesive layer and a fourth adhesive layer, the second adhesive layer is arranged on the first surface; the shading layer is clamped between the first adhesive layer and the second adhesive layer; the anti-warping base layer is clamped between the shading layer and the second adhesive layer; the second surface of the first adhesive layer is provided with an exhaust channel. The self-exhausting shading double-sided adhesive tape is reasonable in structure, the warping problem of a thin adhesive tape is effectively solved while light weight is ensured through the arrangement of the anti-warping base layer, and the adhesive force and retention force of the adhesive tape are improved by combining with the exhaust channel formed in the second surface, so that adhesion is tighter, bubbles are reduced, and the warping problem is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of double-sided adhesive tapes, in particular to a self-exhausting light-shielding double-sided adhesive tape. Background Art

[0002] With the rapid development of electronic technology, electronic products have higher and higher requirements for thinning, lightweight and high performance of components and materials. Among them, tape is an important component for fixing and connecting electronic components. It is not only required to meet the above requirements, but also to meet the requirements of light shielding and electromagnetic interference prevention to ensure the normal operation of electronic products. However, thin tape is prone to poor adhesion and retention, and also has the phenomenon of warping edge, loose fitting and bubble generation.

[0003] Therefore, it is necessary to improve the double-sided tape in the prior art. Utility Model Content

[0004] The purpose of the utility model is to overcome the defects existing in the prior art and provide a self-exhaust light-shielding double-sided tape. By setting an anti-warping base layer, it ensures lightweight while effectively improving the warping problem of thin tape. Combined with the exhaust channel set on the second surface, it not only improves the adhesion and holding force of the tape, but also makes the fit tighter and reduces the occurrence of bubbles and warping problems.

[0005] In order to achieve the above technical effects, the technical solution of the utility model is: a self-exhausting light-shielding double-sided adhesive tape, comprising

[0006] A first adhesive layer having a first surface and a second surface opposite to each other along a thickness direction;

[0007] A second adhesive layer, disposed on the first surface;

[0008] A light shielding layer, sandwiched between the first adhesive layer and the second adhesive layer;

[0009] It also includes an anti-warping base layer, which is sandwiched between the light-shielding layer and the second adhesive layer;

[0010] The second surface of the first adhesive layer is provided with an exhaust channel.

[0011] A preferred technical solution is that the light-shielding layer is a black PET layer, or includes a transparent substrate layer and a dark ink layer, and the dark ink layer faces the anti-warping base layer.

[0012] A preferred technical solution is that the thickness of the anti-warping base layer is greater than the thickness of the light-shielding layer.

[0013] A preferred technical solution is to further include a heat dissipation layer, wherein the heat dissipation layer is arranged between the anti-warping base layer and the second adhesive layer, and / or the heat dissipation layer is arranged between the shading layer and the first adhesive layer; the heat dissipation layer contains graphene or graphite sheets.

[0014] A preferred technical solution is that the second surface is provided with a polygonal convex ring surrounded by a plurality of unit convex segments, the intervals between adjacent polygonal convex rings form a mesh exhaust channel, and adjacent unit convex segments are arranged at intervals.

[0015] A preferred technical solution is that the outer contour of the polygonal convex ring is a hexagonal structure.

[0016] A preferred technical solution is that the first adhesive layer and / or the second adhesive layer is a thermally conductive adhesive layer.

[0017] The preferred technical solution is that the thickness of the black PET layer is 3 to 40 μm, or the thickness of the transparent substrate layer is 3 to 35 μm, the thickness of the dark ink layer is 5 to 10 μm; and the thickness of the anti-warping base layer is 10 to 60 μm.

[0018] A preferred technical solution is that a connecting adhesive layer is provided between the light-shielding layer and the anti-warping base layer.

[0019] A preferred technical solution is that the material of the anti-warping base layer is PET film.

[0020] The advantages and beneficial effects of the utility model are:

[0021] The self-exhaust light-shielding double-sided tape has a reasonable structure. By setting an anti-warping base layer, it ensures lightweight while effectively improving the warping problem of thin tapes. Combined with the exhaust channel set on the second surface, it not only improves the adhesion and holding power of the tape, but also makes the fit tighter and reduces the occurrence of bubbles and warping problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of Embodiment 1 of the self-exhausting light-shielding double-sided adhesive tape of the utility model;

[0023] Figure 2 It is a structural schematic diagram of the second surface of the self-exhausting light-shielding double-sided adhesive tape of the utility model;

[0024] Figure 3 It is a structural schematic diagram of Example 2 of the self-exhaust light-shielding double-sided adhesive tape of the utility model.

[0025] In the figure: 1a, first adhesive layer; 1b, second adhesive layer; 2, second adhesive layer; 3, light shielding layer; 4, release film; 5, heat dissipation layer; 11, polygonal convex ring; 30, connecting adhesive layer; 101, first surface; 102, second surface; 100, exhaust channel; 110, unit protrusion section. DETAILED DESCRIPTION

[0026] The following is a further description of the specific implementation of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0027] The “surface” is based on the normal use state of the self-exhaust light-shielding double-sided tape and is only for the convenience of describing the present invention and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0028] The terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the invention of the utility model, unless otherwise specified, the meaning of "plurality" is two or more.

[0029] like Figures 1 to 3 As shown, the self-exhaust light-shielding double-sided adhesive tape of the present invention comprises a first adhesive layer 1a, a second adhesive layer 1b, and a light-shielding layer 2 sandwiched between the first adhesive layer 1a and the second adhesive layer 1b.

[0030] The first adhesive layer 1 a has a first surface 101 and a second surface 102 opposite to each other along a thickness direction, and the second adhesive layer 1 b is disposed on the first surface 101 , wherein the second surface 102 of the first adhesive layer 1 a is provided with an exhaust channel 100 .

[0031] In order to achieve ultra-thin tape, in addition to the release film, the thickness of the tape is 20 to 500 μm, while ensuring the mechanical properties and preventing the tape from being too thin and causing warping and edge wrapping. It also includes an anti-warping base layer 3, which is sandwiched between the shading layer 2 and the second adhesive layer 102.

[0032] In some embodiments, the light shielding layer 2 is a black PET layer.

[0033] In other embodiments, the light shielding layer 2 includes a transparent substrate layer and a dark ink layer, wherein the dark ink layer is adjacent to the anti-warping base layer. Further, in order to achieve the best light shielding performance, the dark ink layer is a black ink layer.

[0034] In some embodiments, the thickness of the anti-warping base layer 3 is greater than that of the black PET layer, wherein the thickness of the black PET layer is 3-40 μm, and the thickness of the anti-warping base layer 3 is 10-60 μm.

[0035] In other embodiments, the thickness of the anti-warping base layer 3 is greater than the thickness of the transparent substrate layer. The thickness of the transparent substrate layer is 3-35 μm, and the thickness of the anti-warping base layer 3 is 10-60 μm.

[0036] In order to release the heat generated inside the electronic components in time and prevent the adhesive performance of the thin double-sided tape from being reduced or failing, a heat dissipation layer 5 is also included. In some embodiments, the heat dissipation layer 5 is arranged between the anti-warping base layer 3 and the second adhesive layer 102; in some embodiments, the heat dissipation layer 5 is arranged between the light-shielding layer 2 and the first adhesive layer 101; in some embodiments, a heat dissipation layer 5 is arranged between the anti-warping base layer 3 and the second adhesive layer 102 and between the light-shielding layer 2 and the first adhesive layer 101.

[0037] The heat dissipation layer 5 contains graphene or a graphite sheet.

[0038] Graphene is a two-dimensional nanomaterial composed of a single layer of closely arranged carbon atoms. Its unique honeycomb hexagonal lattice structure gives it a series of excellent physical properties, including excellent thermal conductivity. The thermal conductivity of graphene is as high as several kilowatts per meter Kelvin (W / m·K), which is much higher than traditional metal heat dissipation materials such as copper (about 400W / m·K) and aluminum (about 237W / m·K). This means that graphene can transfer heat from the heat source to the surrounding environment with very high efficiency, which helps to dissipate heat quickly. The extremely high thermal conductivity of graphene makes it an ideal heat dissipation material, which can quickly and evenly disperse and transfer the heat generated by the heat source, effectively reduce the hot spot temperature, prevent local overheating, and improve the reliability and life of electronic equipment. Light, thin and flexible, graphene has an extremely low density and ultra-thin thickness (single-layer atomic level), which allows it to be used in electronic devices with strict weight and space restrictions without adding too much weight or volume. At the same time, its flexibility allows it to adapt to complex surfaces and narrow spaces. Graphene has high chemical stability and strong corrosion resistance. It can maintain good performance under a wide range of temperature and humidity conditions and is suitable for heat dissipation applications in various harsh environments.

[0039] Graphite sheets (sometimes also called thermally conductive graphite sheets or graphite heat sinks) are macro-scale materials stacked from multiple layers of graphene. Although their thermal conductivity is slightly lower than that of single-layer graphene, it is still much higher than many traditional heat dissipation materials. Graphite sheets have anisotropic thermal conductivity, that is, the thermal conductivity in the plane direction is significantly higher than that in the thickness direction, and can quickly diffuse heat evenly in the plane. At the same time, their lamellar structure allows them to fit closely with various surfaces to form good thermal contact, further improving the heat dissipation efficiency. Graphite sheets can effectively diffuse the heat generated by concentrated heat sources quickly over a large area, achieve a uniform heat effect, and avoid local overheating. They are especially suitable for electronic devices with large areas and uneven heating. Processing and application flexibility, graphite sheet product thickness can provide a variety of options, and it is easy to punch and die-cut into various shapes to adapt to the complex structures and space limitations inside different electronic products. With good thermal impedance matching, graphite sheets can fill the tiny gap between the heat sink and the heat source, effectively reduce the contact thermal resistance, and improve the heat transfer efficiency of the entire heat dissipation system. Since graphite itself is a non-metallic material, graphite sheets generally do not interfere with electromagnetic signals inside electronic devices while providing efficient heat dissipation, which helps maintain the electromagnetic compatibility of the equipment.

[0040] Among them, the material of the anti-warping base layer is PET film. PET (polyethylene terephthalate) has high tensile strength, tension resistance and impact toughness, and can maintain good mechanical stability even in thin cases, and is not easy to break or tear. It has good dimensional stability, low hygroscopicity and good thermal stability, which means that it can maintain stable dimensions under various environmental conditions (such as temperature changes, humidity fluctuations), and is not prone to shrinkage, expansion or warping, which is crucial for applications that require precise fit and stability. Wear-resistant and scratch-resistant, PET has a high surface hardness and good abrasion resistance. It is not easy to wear or scratch due to friction during daily use or handling, and keeps its appearance as new for a long time. It has strong chemical stability and has good resistance to many organic solvents, oils, weak acids, weak bases and other chemicals. It is not easy to be corroded or dissolved, and is suitable for environments where it may be exposed to various chemicals. It has excellent electrical insulation properties. PET material has a high dielectric constant and a low dielectric loss tangent value. It is an excellent electrical insulation material and is suitable for electronic component packaging, wire and cable insulation, capacitor film and other fields. Arc resistance: PET exhibits good electrical erosion resistance in high-voltage arc environments, which can effectively prevent arc discharge from damaging the substrate. PET is a thermoplastic material that is easy to recycle and reuse, which is in line with the concept of circular economy and sustainable development. Lightweight advantage: Compared with glass or other metal materials, PET has a lower density. When used as a substrate, it can reduce the weight of the overall product, which is conducive to energy saving and transportation cost reduction.

[0041] like Figure 2As shown, the second surface 102 is provided with a polygonal convex ring 11 surrounded by a plurality of unit convex segments 110, and the intervals between adjacent polygonal convex rings 11 form a mesh exhaust channel 100, and the adjacent unit convex segments 110 are arranged at intervals. The adjacent unit convex segments 110 are arranged at intervals, and the inner ring and the outer ring of the polygonal convex ring 11 are connected to optimize the exhaust effect. The outer contour of the polygonal convex ring 11 can be any geometric figure. Furthermore, the outer contour of the polygonal convex ring 11 is a hexagonal structure. Compared with circles, triangles, quadrilaterals and pentagons, the hexagonal structure forms a more divergent exhaust network, and the hexagonal structure can be an irregular hexagon, a regular hexagon, or an axisymmetric hexagon other than a regular hexagon.

[0042] In order to improve the connection firmness between the layers and prevent delamination, a connecting adhesive layer 30 is provided between the light shielding layer 2 and the anti-warping base layer 3. The material of the connecting adhesive layer 30 is acrylic pressure-sensitive adhesive.

[0043] The first adhesive layer 1a and / or the second adhesive layer 1b are heat-conducting adhesive layers. The heat of the electronic products in direct contact with the adhesive layer is promptly discharged through the heat-conducting adhesive layer. The first adhesive layer 1a and the second adhesive layer 1b are made of modified acrylic adhesive, and a release film 4 is provided on the second surface 102 of the first adhesive layer 1a, and the release film 4 is an antistatic release film. The thickness of the first adhesive layer 1a is 1 to 200 μm, the thickness of the second adhesive layer 1b is 1 to 200 μm, and the thickness of the release film 4 is 12 to 200 μm.

[0044] Example 1

[0045] like Figures 1-2 As shown, the self-exhausting light-shielding double-sided adhesive tape of Example 1 comprises a release film 4, a first adhesive layer 1a, a light-shielding layer 2, a connecting adhesive 30 layer, an anti-warping base layer 3 and a second adhesive layer 1b which are stacked in sequence. The light-shielding layer 2 is a black PET layer.

[0046] The second surface 102 of the first adhesive layer 1a is provided with a polygonal convex ring 11 surrounded by a plurality of unit convex sections 110. The intervals between adjacent polygonal convex rings 11 form a mesh exhaust channel 100. Adjacent unit convex sections 110 are arranged at intervals. The outer contour of the polygonal convex ring 11 is a hexagonal structure.

[0047] Example 2

[0048] like Figure 3 As shown, Example 2 is based on Example 1, with the difference that a heat dissipation layer 5 is provided between the anti-warping base layer 3 and the second adhesive layer 1b and between the light-shielding layer 2 and the first adhesive layer 1a, and the first adhesive layer 1a and the second adhesive layer 1b connected to the heat dissipation layer 5 are both thermal conductive adhesive layers.

[0049] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A self-exhausting light-shielding double-sided adhesive tape, comprising A first adhesive layer having a first surface and a second surface opposite to each other along a thickness direction; A second adhesive layer, disposed on the first surface; A light shielding layer, sandwiched between the first adhesive layer and the second adhesive layer; It is characterized in that it also includes an anti-warping base layer, which is sandwiched between the light-shielding layer and the second adhesive layer; The second surface of the first adhesive layer is provided with an exhaust channel.

2. The self-exhausting light-shielding double-sided adhesive tape according to claim 1, characterized in that: The light-shielding layer is a black PET layer, or includes a transparent substrate layer and a dark ink layer, and the dark ink layer faces the anti-warping base layer.

3. The self-exhausting light-shielding double-sided adhesive tape according to claim 2, characterized in that: The thickness of the anti-warping base layer is greater than the thickness of the light shielding layer.

4. The self-exhausting light-shielding double-sided adhesive tape according to claim 2, characterized in that: It also includes a heat dissipation layer, which is arranged between the anti-warping base layer and the second adhesive layer, and / or the heat dissipation layer is arranged between the light-shielding layer and the first adhesive layer; the heat dissipation layer contains graphene or graphite sheets.

5. The self-exhausting light-shielding double-sided adhesive tape according to claim 1 or 2, characterized in that: The second surface is provided with a polygonal convex ring surrounded by a plurality of unit convex segments, the intervals between adjacent polygonal convex rings form a mesh exhaust channel, and the adjacent unit convex segments are arranged at intervals.

6. The self-exhausting light-shielding double-sided adhesive tape according to claim 5, characterized in that: The outer contour of the polygonal convex ring is a hexagonal structure.

7. The self-exhausting light-shielding double-sided adhesive tape according to claim 4, characterized in that: The first adhesive layer and / or the second adhesive layer is a thermally conductive adhesive layer.

8. The self-exhausting light-shielding double-sided adhesive tape according to claim 3, characterized in that: The thickness of the black PET layer is 3-40 μm, or the thickness of the transparent substrate layer is 3-35 μm, the thickness of the dark ink layer is 5-10 μm; and the thickness of the anti-warping base layer is 10-60 μm.

9. The self-exhausting light-shielding double-sided adhesive tape according to claim 1 or 2, characterized in that: A connecting adhesive layer is arranged between the light-shielding layer and the anti-warping base layer.

10. The self-exhausting light-shielding double-sided adhesive tape according to claim 1, characterized in that: The material of the anti-warping base layer is PET film.

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