High-viscosity antistatic acrylic adhesive tape with differential double-layer structure

Abstract

The utility model discloses a high-viscosity antistatic acrylic adhesive tape with a different double-layer structure, and belongs to the technical field of foam adhesive tapes for electronic products. Comprising a foam layer, a first transparent PET film layer, an ink layer, an acrylic acid pressure-sensitive adhesive layer, a second transparent PET film layer, a first antistatic layer, an antistatic acrylic acid pressure-sensitive adhesive layer, a release layer and a second antistatic layer, the first transparent PET film layer and the ink layer are sequentially arranged on one side of the foam layer in the direction from the position close to the foam layer to the position away from the foam layer; the acrylic acid pressure-sensitive adhesive layer, the second transparent PET film layer, the first antistatic layer, the antistatic acrylic acid pressure-sensitive adhesive layer, the release layer and the second antistatic layer are sequentially arranged on the other side of the foam layer from the position close to the foam layer to the position far away from the foam layer; under the condition that the thickness is ultra-thin, the anti-static high-temperature-resistant adhesive tape has excellent anti-static and high-temperature-resistant performance and meanwhile has high viscosity.

Description

Technical Field

[0001] This utility model relates to the technical field of foam tapes for electronic products, and in particular to a high-adhesion antistatic acrylic tape with a differential double-layer structure. Background Technology

[0002] With the rapid development of the electronics and smart technology industry, various functional tapes are being used in a wide range of electronic products, such as mobile phones, computers, LCD TVs, monitors, and medical instruments. These products typically require a layer of foam tape on certain components to utilize the soft and resilient properties of foam for cushioning and shock absorption, protecting components and extending their lifespan. As electronic products become increasingly integrated and thinner, it's crucial to achieve stable and high adhesion to the substrate, even with a foam base and ultra-thin thickness. Furthermore, during the manufacturing and use of electronic products, tapes accumulate static electricity to varying degrees. This can attract dust or other impurities, shortening the lifespan of electronic components and even posing environmental and product safety hazards due to static electricity during manufacturing. Therefore, anti-static tapes are essential. Simultaneously, with continuous technological advancements, there are higher requirements for the masking performance, holding power, high temperature and humidity resistance, and matte finish of tapes.

[0003] Currently, due to the nature of the substrate, foam tapes, especially when extremely thin, struggle to achieve high adhesion to the substrate. Secondly, achieving ultra-low surface resistance is difficult, hindering the attainment of ideal antistatic effects. Existing antistatic tapes mostly rely on internal antistatic agents or antistatic coatings to reduce surface resistance. However, applying an antistatic layer to the substrate surface, below the adhesive layer, makes it difficult to achieve very low surface resistance. Adding internal antistatic agents requires a large dosage, significantly impacting the tape's adhesion, holding power, and resistance to high temperatures and humidity. Therefore, designing a pressure-sensitive tape that is antistatic, ultra-thin, highly adhesive, and has minimal impact on holding power and high-temperature resistance is a necessary trend. Utility Model Content

[0004] The purpose of this invention is to provide a high-adhesion antistatic acrylic tape with a differential double-layer structure. By utilizing the double-layer structure with different thicknesses, the integrated foam tape achieves high adhesion even with an ultra-thin thickness. By utilizing the combined effect of antistatic properties of the film surface and the adhesive, it possesses excellent antistatic properties of the adhesive surface while ensuring adhesion. At the same time, the material also has an ultra-high matte finish.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A high-adhesion antistatic acrylic tape with a differential double-layer structure includes a foam layer, a first transparent PET film layer, an ink layer, an acrylic pressure-sensitive adhesive layer, a second transparent PET film layer, a first antistatic layer, an antistatic acrylic pressure-sensitive adhesive layer, a release layer, and a second antistatic layer. On one side of the foam layer, the first transparent PET film layer and the ink layer are sequentially disposed from the direction closest to the foam layer to the direction furthest from the foam layer. On the other side of the foam layer, the acrylic pressure-sensitive adhesive layer, the second transparent PET film layer, the first antistatic layer, the antistatic acrylic pressure-sensitive adhesive layer, the release layer, and the second antistatic layer are sequentially disposed from the direction closest to the foam layer to the direction furthest from the foam layer.

[0007] Preferably, the foam layer is made of foam with a thickness of 50-100 μm and a light transmittance of 0%.

[0008] Preferably, the thickness of both the first transparent PET film layer and the second transparent PET film layer is 4.5 μm.

[0009] Preferably, the thickness of the ink layer is 1-2 μm.

[0010] Preferably, the thickness of the acrylic pressure-sensitive adhesive layer is 3-4 μm, and the thickness of the antistatic acrylic pressure-sensitive adhesive layer is 6-7 μm.

[0011] Preferably, the thicknesses of the first antistatic layer and the second antistatic layer are 0.1-0.2 μm, and the antistatic values ​​of the first antistatic layer and the second antistatic layer are 10, respectively. 4 -10 6 Ω.

[0012] Preferably, the resistance of the antistatic acrylic pressure-sensitive adhesive layer is 10 Ω. 5 -10 6 Ω.

[0013] Preferably, the thickness of the release layer is 0.2-0.4 μm, and the release force is 8-13 gf / 25 mm.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. Compared to tapes with PET substrate, the adhesive strength of this invention, which uses foam as the substrate, is usually significantly reduced. To overcome this technical defect, this invention utilizes a double-layer structure with the thickness difference between the acrylic pressure-sensitive adhesive layer and the antistatic acrylic pressure-sensitive adhesive layer. This improves the adhesive strength required for the adhered object even with an ultra-thin material and foam substrate. Furthermore, the acrylic pressure-sensitive adhesive layer and the antistatic acrylic pressure-sensitive adhesive layer are made of high-temperature resistant acrylic adhesive, ensuring that the material maintains high adhesive strength even under long-term high-temperature and high-humidity environments.

[0016] 2. By coating an antistatic layer onto the second transparent PET substrate and adding antistatic material (only 0.5% antistatic material) to the antistatic acrylic pressure-sensitive adhesive layer, the material can achieve ultra-low adhesive surface resistance and excellent antistatic effect through the synergistic effect of the two. In the subsequent product manufacturing process, damage to the product and the surrounding environment caused by static electricity accumulation can be avoided, which facilitates the safe production and use of the product.

[0017] 3. By coating the surface of the first transparent PET substrate with an ink layer, the material surface can simultaneously possess excellent antistatic properties and high matte finish, while also having a good masking effect.

[0018] 4. By using the second antistatic layer and the release layer together, a lower tear-off voltage can be obtained, avoiding the damage of static electricity to the tape and electronic products during the tear-off process, and also avoiding the potential dangers of static electricity accumulation to the environment and personnel. Attached Figure Description

[0019] Figure 1 This is a schematic diagram showing the result of viewing the present invention from the front.

[0020] In the diagram: 1-foam layer, 2-first transparent PET film layer, 3-ink layer, 4-acrylic pressure-sensitive adhesive layer, 5-second transparent PET film layer, 6-first antistatic layer, 7-antistatic acrylic pressure-sensitive adhesive layer, 8-release layer, 9-second antistatic layer. Detailed Implementation

[0021] Example 1

[0022] A high-adhesion antistatic acrylic tape with a differential double-layer structure, such as Figure 1 As shown, it includes a foam layer 1, a first transparent PET film layer 2, an ink layer 3, an acrylic pressure-sensitive adhesive layer 4, a second transparent PET film layer 5, a first antistatic layer 6, an antistatic acrylic pressure-sensitive adhesive layer 7, a release layer 8, and a second antistatic layer 9. Figure 1 As shown, on one side of the foam layer 1, from the direction closest to the foam layer 1 to the direction furthest away from the foam layer 1, the first transparent PET film layer 2 and the ink layer 3 are sequentially disposed; on the other side of the foam layer 1, from the direction closest to the foam layer 1 to the direction furthest away from the foam layer 1, the acrylic pressure-sensitive adhesive layer 4, the second transparent PET film layer 5, the first antistatic layer 6, the antistatic acrylic pressure-sensitive adhesive layer 7, the release layer 8, and the second antistatic layer 9 are sequentially disposed. The thickness of both the first transparent PET film layer 2 and the second transparent PET film layer 5 is 4.5 μm.

[0023] In this embodiment, by setting the ink layer 3, the material can have ultra-low surface resistance, ultra-high matte finish, and excellent masking performance, eliminating static electricity while meeting application requirements and protecting the material and the environment. In this embodiment, the acrylic pressure-sensitive adhesive layer 4 and the antistatic acrylic pressure-sensitive adhesive layer 7 are used together. Utilizing the thickness difference between the two layers and their high-temperature resistance, the material thickness is ensured to meet requirements while improving adhesion to the substrate and maintaining high-temperature resistance. In this embodiment, the first antistatic layer 6 and the antistatic acrylic pressure-sensitive adhesive layer 7 are used together, significantly increasing the adhesive surface resistance and giving the material excellent antistatic properties. Through the synergistic effect of the second antistatic layer 9 and the release layer 8, the material has a low peel voltage, protecting the material and the environment from static electricity hazards.

[0024] Furthermore, based on Example 1, the foam layer 1 is made of black foam with a thickness of 50-100 μm and a light transmittance of 0%. By limiting the thickness and light transmittance of the foam layer 1, the masking effect and cushioning performance of the tape can be improved.

[0025] Furthermore, based on Example 1, the ink layer 3 has a thickness of 1-2 μm, a matte finish between 1 and 5, and is fingerprint-resistant and non-reflective; in addition, its antistatic value ranges from 10. 5 -10 6 Ω has excellent antistatic properties, light transmittance of less than 0.1%, and good shielding performance.

[0026] Furthermore, based on Example 1, the thickness of the acrylic pressure-sensitive adhesive layer 4 is 3-4 μm, and the thickness of the antistatic acrylic pressure-sensitive adhesive layer 7 is 6-7 μm; the resistance of the antistatic acrylic pressure-sensitive adhesive layer 7 is 10 Ω·cm. 5 -10 6 Ω. This solution utilizes a double-layer structure with varying thicknesses of acrylic adhesive layers. Even with a thin foam substrate, the adhesion to the adhered object is ≥800gf / 25mm, indicating strong tack. At 85℃ for 24 hours, the force displacement remains 0mm. After aging for 10 days at 85℃ and 85%RH, the adhesion still remains ≥700gf / 25mm, demonstrating excellent high-temperature resistance.

[0027] Furthermore, based on Example 1, the thickness of the first antistatic layer 6 is 0.1-0.2 μm, and the antistatic value of the first antistatic layer 6 is 10. 4 -10 6Ω. Furthermore, the addition of 0.5% nickel powder to the antistatic acrylic pressure-sensitive adhesive layer 7 significantly reduces the impact of the antistatic agent on the adhesive's tackiness. In this design, the synergistic effect of the first antistatic layer 6 and the antistatic acrylic pressure-sensitive adhesive layer 7 ensures that the adhesive surface resistance of the material is within 10 Ω. 5 -10 6 Ω has excellent antistatic properties on the adhesive surface.

[0028] Furthermore, based on Example 1, the thickness of the second antistatic layer 9 is 0.1-0.2 μm, and the resistance of the second antistatic layer 9 is 10 Ω·cm. 4 -10 6 The release layer 8 has a thickness of 0.2-0.4 μm and a release force of 8-13 gf / 25 mm. In this design, the release layer 8 and the second antistatic layer 9 are used together to ensure a low tear voltage when the material is peeled off from the release film, preventing electrostatic hazards. The tear voltage when peeling off the release film is less than 200V.

[0029] It is worth noting that: Figure 1 The layer thicknesses shown in the image are not the actual thicknesses. Figure 1 It merely shows the positional relationship between the layers.

Claims

1. A high-adhesion antistatic acrylic tape with a differential double-layer structure, characterized in that, It includes a foam layer (1), a first transparent PET film layer (2), an ink layer (3), an acrylic pressure-sensitive adhesive layer (4), a second transparent PET film layer (5), a first antistatic layer (6), an antistatic acrylic pressure-sensitive adhesive layer (7), a release layer (8), and a second antistatic layer (9); the first transparent PET film layer (2) and the ink layer are sequentially arranged on one side of the foam layer (1) from the direction close to the foam layer (1) to the direction away from the foam layer (1); the acrylic pressure-sensitive adhesive layer (4), the second transparent PET film layer (5), the first antistatic layer (6), the antistatic acrylic pressure-sensitive adhesive layer (7), the release layer (8), and the second antistatic layer (9) are sequentially arranged on the other side of the foam layer (1) from the direction close to the foam layer (1) to the direction away from the foam layer (1).

2. The high-adhesion antistatic acrylic tape with a differential double-layer structure according to claim 1, characterized in that, The foam layer (1) is made of foam with a thickness of 50-100um and a light transmittance of 0%.

3. The high-adhesion antistatic acrylic tape with a differential double-layer structure according to claim 1, characterized in that, The thickness of the first transparent PET film layer (2) and the second transparent PET film layer (5) is 4.5 μm.

4. The high-adhesion antistatic acrylic tape with a differential double-layer structure according to claim 1, characterized in that, The thickness of the ink layer (3) is 1-2 μm.

5. The high-adhesion antistatic acrylic tape with a differential double-layer structure according to claim 1, characterized in that, The acrylic pressure-sensitive adhesive layer (4) has a thickness of 3-4 μm, and the antistatic acrylic pressure-sensitive adhesive layer (7) has a thickness of 6-7 μm.

6. The high-adhesion antistatic acrylic tape with a differential double-layer structure according to claim 1, characterized in that, The thicknesses of the first antistatic layer (6) and the second antistatic layer (9) are 0.1-0.2 μm, respectively, and the antistatic values ​​of the first antistatic layer (6) and the second antistatic layer (9) are 10, respectively. 4 -10 6 Ω.

7. The high-adhesion antistatic acrylic tape with a differential double-layer structure according to claim 1, characterized in that, The resistance of the antistatic acrylic pressure-sensitive adhesive layer (7) is 10. 5 -10 6 Ω.

8. The high-adhesion antistatic acrylic tape with a differential double-layer structure according to claim 1, characterized in that, The thickness of the release layer (8) is 0.2-0.4 μm, and the release force is 8-13 gf / 25 mm.

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