Buffering adhesive tape

Abstract

The utility model discloses a buffering adhesive tape and relates to the technical field of adhesive tapes. The buffer adhesive tape comprises at least one release layer, at least three damping adhesive layers, at least one buffer layer and at least one elastic layer, the buffer layer or the elastic layer is arranged between every two adjacent damping glue layers; the outermost layer of at least one side of the buffer adhesive tape is a release layer, and the release layer is attached to the damping adhesive layer. According to the buffer adhesive tape provided by the utility model, the multiple damping adhesive layers can effectively absorb and dissipate impact energy and also can ensure firm bonding among the functional layers, and the buffer layer disperses the impact energy through the high energy absorption characteristic of a foam material, so that the damage of instantaneous stress to equipment is reduced; the elastic layer quickly recovers deformation by virtue of high resilience and provides rigid support, so that plastic deformation caused by repeated impact is avoided. The buffering adhesive tape has the advantages of efficient buffering, separation resistance, long service life and strong environmental adaptability, and can meet the double requirements of high-precision electronic equipment on impact resistance and durability under complex working conditions.

Description

Technical Field

[0001] This utility model relates to the field of adhesive tape technology, and in particular to a cushioning adhesive tape. Background Technology

[0002] In recent years, with the rapid development of science and technology and the increasing demand from consumers for a high-quality life, flexible display electronic products such as smartphones, wearable devices, and smart home devices have become increasingly popular. These devices have significantly increased reliability requirements, especially in terms of impact resistance, bending resistance, and long-term stability, which places higher demands on the accompanying cushioning tapes. Traditional cushioning tapes mostly use foam composite materials as the core functional layer, achieving a cushioning effect by bonding the substrate and protective layer with pressure-sensitive adhesive. However, existing foam-based cushioning tapes have gradually revealed many limitations in practical applications, making it difficult to meet the urgent need for high-performance cushioning materials in emerging electronic devices.

[0003] While widely used foam cushioning tapes possess certain energy absorption characteristics, their folding resistance is poor. After repeated bending or prolonged stress, the adhesive layer is prone to separating from the substrate, leading to adhesive failure. Furthermore, the low inherent elongation of foam materials makes them susceptible to plastic deformation under long-term dynamic loads, significantly shortening product lifespan. Meanwhile, traditional pressure-sensitive adhesive layers act solely as bonding media, exhibiting weak damping effects and failing to effectively disperse impact energy. The cushioning function relies entirely on the physical deformation of the foam matrix. This single-foam-dependent structural design not only limits the overall cushioning efficiency of the tape but also renders it inadequate in handling high-frequency impacts or complex stress scenarios, severely restricting its application range.

[0004] The aforementioned technical bottlenecks indicate that existing cushioning tapes have significant shortcomings in terms of structural design, material coordination, and functional integration. There is an urgent need for a new type of cushioning tape to meet the stringent cushioning and protection requirements of highly reliable electronic devices. Utility Model Content

[0005] The technical problem to be solved by this utility model embodiment is the deficiency mentioned in the background art. It provides a new type of buffer tape that can achieve multiple functions of energy absorption, stress dispersion and elastic support through innovative optimization of material selection and structure while ensuring high bonding strength. This breaks through the technical limitations of traditional solutions and meets the stringent requirements of high-reliability electronic equipment for buffer protection.

[0006] To address the above problems, the present invention provides the following technical solutions:

[0007] A cushioning tape includes at least one release layer, at least three damping adhesive layers, at least one cushioning layer, and at least one elastic layer; a cushioning layer or an elastic layer is disposed between two adjacent damping adhesive layers; the outermost layer on at least one side of the cushioning tape is a release layer, which is attached to the damping adhesive layer; the damping adhesive layer is made of a material with a damping factor tanδ≥0.7 and an adhesion strength of 4000gf / inch or higher.

[0008] A further technical solution is that the damping adhesive layer is made of acrylic resin.

[0009] A further technical solution is that the thickness of the damping adhesive layer is 5μm to 50μm.

[0010] A further technical solution is that the material of the buffer layer is selected from any one of PU foam, EVA foam, EPE pearl cotton, EPDM foam, XPE foam and conductive foam.

[0011] A further technical solution is that the thickness of the buffer layer is 5μm to 50μm.

[0012] A further technical solution is that the material of the elastic layer is selected from any one of TPU elastomer, TPE elastomer, TPV elastomer, TPX elastomer, SBS elastomer, SEBS elastomer, NR elastomer, SBR elastomer, BR elastomer, CR elastomer, NBR elastomer, EPDM elastomer, IIR elastomer, SR elastomer, FKM elastomer, and ACM elastomer.

[0013] A further technical solution is that the thickness of the elastic layer is 5μm to 50μm.

[0014] A further technical solution is that the release layer is selected from any one of silicone oil release layer, non-silicone release layer and fluorine release layer.

[0015] A further technical solution is that the thickness of the release layer is 10μm to 100μm.

[0016] A further technical solution is that the outermost layer on one side of the buffer tape is a release layer, and the outermost layer on the other side is a buffer layer, wherein the buffer layer is attached to the damping adhesive layer.

[0017] Compared with the prior art, the technical effects achieved by the embodiments of this utility model include:

[0018] The cushioning tape provided by this utility model significantly improves its overall performance through a multi-layer composite structure design. The damping adhesive layer uses a material with high damping factor (tanδ≥0.7) and high adhesion (≥4000gf / inch), which not only effectively absorbs and dissipates impact energy but also ensures strong adhesion between functional layers, avoiding interlayer delamination caused by stress concentration during long-term use. The alternating arrangement of the cushioning layer and the elastic layer forms an "energy absorption-support" synergistic mechanism: the cushioning layer disperses impact energy through the high energy absorption characteristics of the foam material, reducing damage to the equipment from instantaneous stress; the elastic layer quickly recovers its deformation due to its high resilience and provides rigid support, avoiding plastic deformation caused by repeated impacts. The multi-layer damping adhesive layer further optimizes the energy absorption and stress transmission process in stages, reducing peak impact force through stepwise dissipation while enhancing the overall bending resistance of the tape. The release layer serves as an outer protective layer, ensuring the stability of the tape during storage and transportation. It can be removed during use to directly expose the highly adhesive damping adhesive layer, enabling rapid installation. This structural design enables the tape to combine high-efficiency cushioning, anti-separation, long lifespan, and strong environmental adaptability, meeting the dual requirements of high-precision electronic equipment for impact resistance and durability under complex working conditions. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0020] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0021] Figure 1 This is a schematic diagram of the buffer tape structure provided in Embodiment 1 of this utility model;

[0022] Figure 2 This is a schematic diagram of the buffer tape structure provided in Embodiment 2 of this utility model;

[0023] Figure 3 This is a schematic diagram of the buffer tape structure provided in Embodiment 3 of this utility model;

[0024] Figure 4 This is a schematic diagram of the buffer tape structure provided in Embodiment 4 of this utility model.

[0025] Figure 5 The results of the ball impact test of the buffer tape provided in Embodiments 1-4 of this utility model.

[0026] Figure Labels

[0027] Release layer 1, damping adhesive layer 2, buffer layer 3, elastic layer 4. Detailed Implementation

[0028] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Similar component reference numerals in the drawings represent similar components. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0029] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0030] It should also be understood that the terminology used in this specification of embodiments of the present invention is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of the present invention. As used in this specification of embodiments of the present invention and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0031] See Figure 1-4 This utility model provides a cushioning tape, as shown in the figure, which includes at least one release layer 1, at least three damping adhesive layers 2, at least one cushioning layer 3, and at least one elastic layer 4; the cushioning layer 3 or the elastic layer 4 is disposed between two adjacent damping adhesive layers 2; the outermost layer on at least one side of the cushioning tape is the release layer 1, and the release layer 1 is attached to the damping adhesive layer 2; the damping adhesive layer 2 is made of a material with a damping factor tanδ≥0.7 and an adhesion strength of 4000gf / inch or more.

[0032] The cushioning tape provided in this embodiment of the invention significantly improves its overall performance through a multi-layer composite structure design. The damping adhesive layer uses a material with high damping factor (tanδ≥0.7) and high adhesion (≥4000gf / inch), which not only effectively absorbs and dissipates impact energy but also ensures strong adhesion between functional layers, avoiding interlayer delamination caused by stress concentration during long-term use. The alternating arrangement of the cushioning layer and the elastic layer forms an "energy absorption-support" synergistic mechanism: the cushioning layer disperses impact energy through the high energy absorption characteristics of the foam material, reducing damage to the equipment from instantaneous stress; the elastic layer quickly recovers its deformation due to its high resilience and provides rigid support, avoiding plastic deformation caused by repeated impacts. The multi-layer damping adhesive layer further optimizes the energy absorption and stress transmission process in stages, reducing peak impact force through stepwise dissipation while enhancing the overall bending resistance of the tape. The release layer serves as an outer protective layer, ensuring the stability of the tape during storage and transportation. When used, it can be removed to directly expose the highly adhesive damping adhesive layer, enabling rapid installation. This structural design enables the tape to combine high-efficiency cushioning, anti-separation, long lifespan, and strong environmental adaptability, meeting the dual requirements of high-precision electronic equipment for impact resistance and durability under complex working conditions.

[0033] In this specific implementation, the damping adhesive layer 2 is made of acrylic resin. Understandably, the acrylic resin selected in this embodiment has a high damping factor (tanδ≥0.7) and strong adhesion (≥4000gf / inch). Compared to silicone damping adhesive, silicone damping factor (tanδ<0.7) and high-adhesion silicone adhesive can only reach a maximum adhesion strength of 1500gf / inch. The use of acrylic resin damping adhesive in this solution can significantly improve the energy dissipation capacity of the tape. Its molecular chain flexibility can effectively absorb impact vibrations, and at the same time, chemical cross-linking enhances the interlayer bonding force, not only firmly bonding adjacent layers but also providing a certain damping and buffering effect.

[0034] In specific implementations, the thickness of the damping adhesive layer 2 is 5μm to 50μm, a thickness range that balances energy absorption efficiency and overall tape flexibility. If the damping adhesive layer 2 is too thin, its damping performance is insufficient, making it difficult to disperse high-frequency impact energy; if the damping adhesive layer 2 is too thick, it increases the rigidity of the tape, affecting adhesion. In some embodiments, the thickness of the damping adhesive layer 2 is 5μm, 10μm, 15μm, 20μm, 25μm, 30μm, 35μm, 40μm, 45μm, or 50μm.

[0035] In specific implementation, the material of the buffer layer 3 is selected from any one of PU foam, EVA foam, EPE pearl cotton, EPDM foam, XPE foam and conductive foam.

[0036] PU foam offers high resilience and resistance to compression deformation, making it suitable for high-frequency impact scenarios; EVA foam is lightweight and weather-resistant, ideal for long-term outdoor use; conductive foam can also provide electromagnetic shielding. Different foam materials can optimize energy absorption efficiency for specific applications, expanding the functionality and applicability of the tape.

[0037] In specific implementations, the thickness of the buffer layer 3 is 5μm to 50μm, a thickness range that balances buffering efficiency and space occupancy. A thinner buffer layer 3 (e.g., 5μm) is suitable for micro-devices, reducing the overall thickness; a thicker buffer layer 3 (e.g., 50μm) can increase energy absorption capacity and withstand high-intensity impacts. This invention, through thickness adjustment, can match the protection requirements of different devices. In some embodiments, the thickness of the buffer layer 3 is 5μm, 10μm, 15μm, 20μm, 25μm, 30μm, 35μm, 40μm, 45μm, or 50μm.

[0038] In specific implementation, the material of the elastic layer 4 is selected from any one of TPU elastomer, TPE elastomer, TPV elastomer, TPX elastomer, SBS elastomer, SEBS elastomer, NR elastomer, SBR elastomer, BR elastomer, CR elastomer, NBR elastomer, EPDM elastomer, IIR elastomer, SR elastomer, FKM elastomer, and ACM elastomer.

[0039] TPU combines high elasticity and abrasion resistance, providing durable support; TPE is flexible and easy to process, suitable for bonding to complex curved surfaces. The elastic layer offsets residual impact stress through its rapid rebound characteristics, preventing fatigue damage to the tape caused by repeated deformation, while also enhancing the rigid support of the equipment and preventing displacement or detachment due to external forces.

[0040] In specific implementations, the thickness of the elastic layer 4 is 5μm to 50μm. Understandably, if the elastic layer 4 is too thin (<5μm), it may result in insufficient support and inability to effectively rebound impact forces; if the elastic layer 4 is too thick (>50μm), it may reduce the tape's flexibility. An elastic layer 4 of 5–50μm can provide sufficient support while maintaining the tape's bending adaptability, meeting the dynamic usage requirements of flexible devices such as foldable screens. In some embodiments, the thickness of the elastic layer 4 is 5μm, 10μm, 15μm, 20μm, 25μm, 30μm, 35μm, 40μm, 45μm, or 50μm.

[0041] In specific implementation, the release layer 1 is selected from any one of silicone oil release layer, non-silicone release layer, and fluorinated release layer. Silicone oil release layer is easy to peel off and low in cost, suitable for general applications; non-silicone release layer avoids silicone migration contamination, suitable for high-cleanliness environments; fluorinated release layer has excellent high-temperature resistance and is suitable for high-temperature processes. Different materials can provide differentiated protection for storage conditions and usage environments, ensuring the stability of tape performance.

[0042] In specific implementations, the thickness of the release layer 1 is 10 μm to 100 μm. A thinner release layer 1 (e.g., 10 μm) reduces resource waste and aligns with environmental protection trends; a thicker release layer 1 (e.g., 100 μm) enhances mechanical protection and prevents scratches on the adhesive layer during transportation. This range balances protective effectiveness and economy while ensuring the adhesive layer remains intact and residue-free upon peeling. In some embodiments, the thickness of the release layer 1 is any one of 12 μm, 25 μm, 36 μm, 75 μm, 100 μm, etc.

[0043] See further Figure 1 and Figure 2 These are schematic diagrams of the cushioning tape structures provided in Examples 1 and 2, respectively. The outermost layers on both sides of the cushioning tape are release layers 1, which are attached to the damping adhesive layer 2. This is a double-sided tape structural design.

[0044] See further Figure 3 and Figure 4 These are schematic diagrams of the buffer tape structures provided in Examples 3 and 4, respectively. The outermost layer on one side of the buffer tape is a release layer 1, and the outermost layer on the other side is a buffer layer 3, which is attached to the damping adhesive layer 2. This is a single-sided tape design; the buffer layer 3, as the outermost layer on the other side, can directly contact the equipment surface, reducing stress concentration during installation and improving bonding reliability through its energy-absorbing properties.

[0045] In Examples 1-4, release layer 1 is a silicone oil release layer with a thickness of 10 μm, damping adhesive layer 2 has a thickness of 5 μm, buffer layer 3 is PU foam with a thickness of 5 μm, and elastic layer 4 is TPU elastomer with a thickness of 5 μm.

[0046] Drop ball impact tests were conducted on the cushioning tapes of Examples 1-4 to test their impact resistance. The results are shown in Table 1 below. Figure 5 .

[0047] Table 1. Test results of the cushioning tape in Examples 1-4

[0048]

[0049] Clearly, the cushioning tape of this invention significantly improves the overall performance of the cushioning tape through its multi-layer composite structure design.

[0050] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0051] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0052] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0053] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0054] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0055] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0056] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Since these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

[0057] The above description describes specific embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A cushioning tape, characterized by, The cushioning adhesive tape comprises at least one release layer, at least three damping adhesive layers, at least one buffer layer and at least one elastic layer; one buffer layer or elastic layer is arranged between two adjacent damping adhesive layers; the outermost layer on at least one side of the cushioning adhesive tape is a release layer, and the release layer is attached to the damping adhesive layer; the damping adhesive layer is made of a material with a damping factor tan delta greater than or equal to 0.7 and an adhesive force greater than or equal to 4000 gf / inch.

2. The cushioning tape of claim 1, wherein The material of the damping adhesive layer is acrylic resin.

3. The cushioning tape of claim 1, wherein The thickness of the damping adhesive layer is 5-50 μm.

4. The cushioning tape of claim 1, wherein, The material of the buffer layer is selected from any one of PU foam, EVA foam, EPE pearl foam, EPDM foam, XPE foam and conductive foam.

5. The cushioning tape of claim 1, wherein, The thickness of the buffer layer is 5-50 μm.

6. The cushioning tape of claim 1, wherein, The material of the elastic layer is selected from any one of TPU elastomer, TPE elastomer, TPV elastomer, TPX elastomer, SBS elastomer, SEBS elastomer, NR elastomer, SBR elastomer, BR elastomer, CR elastomer, NBR elastomer, EPDM elastomer, IIR elastomer, SR elastomer, FKM elastomer and ACM elastomer.

7. The cushioning tape of claim 1, wherein The thickness of the elastic layer is 5-50 μm.

8. The cushioning tape of claim 1, wherein, The release layer is selected from any one of silicone oil release layer, non-silicon release layer and fluorine release layer.

9. The cushioning tape of claim 1, wherein, The thickness of the release layer is 10-100 μm.

10. The cushioning tape of claim 1, wherein, The outermost layer on one side of the cushioning adhesive tape is a release layer, and the outermost layer on the other side is a buffer layer, and the buffer layer is attached to the damping adhesive layer.

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