Anti-vibration cushioning type foam tape

Abstract

The utility model discloses an anti -seismic buffer type foam tape, including the type layer of separation, first pressure sensitive adhesive layer, elastic transition layer, composite buffer foam core layer and second pressure sensitive adhesive layer who are sequentially laminated in the thickness direction, the inside of composite buffer foam core layer is equipped with the honeycomb array buffer cavity of extending along the length direction of adhesive tape, and the inside of every buffer cavity is equipped with the elastic tendon of cross -intersection, the elastic transition layer is continuous wave -shaped layer structure, and the peak of elastic transition layer is to the one side of composite buffer foam core layer, and the valley is to the one side of first pressure sensitive adhesive layer, the utility model discloses the purpose is to overcome the low -efficient of the low defect of the structure stability of existing foam tape anti -seismic buffer performance, and the low defect of sticking positioning accuracy.

Description

Technical Field

[0001] This utility model relates to the field of adhesive tape technology, specifically to a shock-absorbing foam adhesive tape. Background Technology

[0002] Foam tape, due to its combination of adhesive and cushioning properties, is widely used in the assembly and protection of various products. However, existing foam tapes have significant deficiencies in shock absorption and cushioning performance, making it difficult to meet the needs of high-precision and high-protection scenarios. Single and inefficient cushioning performance: Traditional foam tapes mostly use solid foam or a single cavity structure. When faced with external forces from different directions (such as vertical impact and horizontal vibration), they cannot achieve uniform cushioning and are prone to damage to the bonded parts due to local stress concentration. Insufficient vibration transmission suppression: The interlayer structure of existing foam tapes is mostly planar bonding, lacking a transition structure. When subjected to external impact, vibration can be directly transmitted to the protected component through the interlayer, which cannot effectively weaken the vibration energy. Poor structural stability: Narrow-width (e.g., about 5mm) foam tape is prone to edge damage and delamination during cutting, transportation and installation. When subjected to long-term vibration, the foam core layer is prone to deformation, resulting in a decrease in cushioning performance. Low positioning accuracy: The release layer of existing foam tapes is mostly solid color and lacks positioning marks. In the precise installation of small parts (such as electronic components), alignment deviations can easily lead to protection failure or affect the appearance of the product.

[0003] To address the aforementioned issues, there is an urgent need to design a foam tape that combines high-efficiency shock absorption, structural stability, and precise fit to meet the usage requirements of high-protection scenarios. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing foam tapes, such as inefficient shock absorption performance, poor structural stability, and low bonding and positioning accuracy, and to provide a shock-absorbing foam tape.

[0005] Therefore, the specific technical solution adopted by this utility model is as follows: An anti-vibration cushioning foam tape includes a release layer, a first pressure-sensitive adhesive layer, an elastic transition layer, a composite cushioning foam core layer, and a second pressure-sensitive adhesive layer, which are stacked sequentially along the thickness direction. The overall width of the foam tape is 5mm, suitable for the installation space of small and medium-sized parts. The composite cushioning foam core layer has a honeycomb array of cushioning cavities extending along the length of the tape. Each cushioning cavity has cross-shaped elastic ribs inside. The honeycomb structure can disperse forces in multiple directions, and the cross-shaped elastic ribs can enhance the deformation resistance of the cushioning cavity. The elastic transition layer has a continuous wavy layered structure, with the crests of the elastic transition layer facing the composite cushioning foam core layer and the troughs facing the first pressure-sensitive adhesive layer. The wavy structure can further absorb vibration energy through its own deformation, avoiding direct transmission of vibration.

[0006] Preferably, the composite cushioning foam core layer is made of high-density PU foam with an overall thickness of 0.3–1.0 mm. High-density PU foam combines elasticity and support, and can maintain cushioning performance for a long time. The individual cross-section of the honeycomb array cushioning cavity is a regular hexagon with a side length of 0.1–0.3 mm. The regular hexagonal structure has the best force transmission and dispersion effect. The elastic rib is made of nitrile rubber with a diameter of 0.03–0.08 mm, and the two ends of the elastic rib are fixedly connected to the opposite inner wall of the cushioning cavity. The high elasticity of nitrile rubber can ensure that the cushioning cavity rebounds quickly after being compressed.

[0007] Preferably, the elastic transition layer is made of EPDM film, with an overall thickness (vertical distance from crest to trough) of 0.08–0.2 mm; the wave height of the elastic transition layer is 0.05–0.1 mm, the wave pitch is 0.2–0.5 mm, and the Shore hardness of the elastic transition layer is 30–50 HA. The EPDM film has strong aging resistance, and the size design of the wave-shaped structure can match the buffer stroke of the composite buffer foam core layer, realizing the gradient absorption of vibration energy.

[0008] Preferably, both sides of the composite cushioning foam core layer are wrapped with elastic edge strips. The material of the elastic edge strips is the same as that of the elastic ribs (nitrile rubber), and the thickness of the elastic edge strips is the same as that of the composite cushioning foam core layer. The width is 0.05 to 0.15 mm. The elastic edge strips can prevent the edges of the composite cushioning foam core layer from being damaged, while enhancing the overall tear resistance of the tape.

[0009] Preferably, the upper surface of the release layer is provided with spaced positioning reference lines along its length. The width of the positioning reference lines is 0.02 to 0.05 mm, the spacing between adjacent positioning reference lines is 10 to 20 mm, and the extension direction of the positioning reference lines is parallel to the width direction of the adhesive tape. The positioning reference lines can help installers quickly align the parts to be bonded and improve the bonding accuracy.

[0010] Preferably, the release layer is made of PET release film or single-sided release paper, with a thickness of 0.03 to 0.1 mm. PET release film has excellent flatness, which can prevent the tape from wrinkling during the winding process; single-sided release paper has a lower cost and is suitable for cost-sensitive scenarios.

[0011] Preferably, both the first pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer are made of modified acrylic pressure-sensitive adhesive, and the thickness of the first pressure-sensitive adhesive layer is 0.03-0.08 mm, and the thickness of the second pressure-sensitive adhesive layer is 0.05-0.1 mm. Modified acrylic pressure-sensitive adhesive has high bonding strength and good temperature resistance, which can ensure that the tape does not delaminate during long-term use.

[0012] Preferably, the honeycomb array buffer cavities are distributed at a density of 10–25 cavities / cm² within the composite buffer foam core layer. 2 Furthermore, the total volume of the buffer cavity accounts for 30% to 50% of the total volume of the composite buffer foam core layer. This density and volume ratio can balance the buffering performance and the support performance, and avoid excessive compression leading to buffering failure.

[0013] Preferably, the positioning reference line is marked with white ink or yellow fluorescent ink, and the color contrast between the positioning reference line and the release layer body is ≥80%. The high contrast design can ensure that the positioning reference line is clearly visible under different lighting conditions, thereby improving positioning reliability.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: (1) The honeycomb-shaped buffer cavity of the composite buffer foam core layer, combined with the cross elastic rib, can disperse external forces in multiple directions; the wave-shaped structure of the elastic transition layer can absorb vibration energy in a gradient. Compared with traditional foam tape, the vibration attenuation rate is increased by more than 40%, and the impact absorption capacity is increased by more than 35%. (2) The elastic edge band can protect the edge of the composite cushioning foam core layer and prevent damage and delamination; the combination of high-density PU foam and nitrile rubber can ensure that the tape maintains its shape stability after long-term vibration, and the cushioning performance decay rate is ≤15% (after 1000 hours of use). (3) The positioning reference line on the release layer can control the bonding alignment error within ±0.1mm, which is suitable for the installation of small high-precision parts; (4) The overall width of 5mm can match the installation space of most small and medium-sized parts. The temperature resistance range of the modified acrylic pressure-sensitive adhesive is -40℃~80℃, which can adapt to different usage environments. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments 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.

[0016] Figure 1 This is a cross-sectional view of a shock-absorbing foam tape according to an embodiment of the present utility model; Figure 2 This is a left view of a shock-absorbing foam tape according to an embodiment of the present utility model; Figure 3 This is a schematic diagram of the worm gear and worm in a shock-absorbing foam tape according to an embodiment of the present utility model; Figure 4 This is a partial three-dimensional structural diagram of the drive mechanism in a shock-absorbing foam tape according to an embodiment of the present utility model.

[0017] Figure label: 1. Release layer; 2. First pressure-sensitive adhesive layer; 3. Elastic transition layer; 4. Composite cushioning foam core layer; 5. Second pressure-sensitive adhesive layer; 6. Honeycomb array cushioning cavity; 7. Cross-shaped elastic ribs; 8. Elastic edge banding strip; 9. Positioning baseline. Detailed Implementation

[0018] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0019] According to an embodiment of the present invention, a shock-absorbing foam tape is provided.

[0020] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figure 1-4 As shown, an anti-vibration and cushioning foam tape according to an embodiment of the present invention includes a release layer 1, a first pressure-sensitive adhesive layer 2, an elastic transition layer 3, a composite cushioning foam core layer 4, and a second pressure-sensitive adhesive layer 5, which are stacked sequentially along the thickness direction. The overall width of the tape is 5mm.

[0021] In this embodiment, the release layer 1 is made of PET release film with a thickness of 0.05mm. The upper surface is printed with a positioning reference line 9 made of white ink. The positioning reference line 9 is 0.03mm wide and the adjacent spacing is 15mm. The extension direction is parallel to the width direction of the tape. During installation, the positioning reference line 9 can be used to quickly align with the edge of the camera module, and the alignment error is ≤±0.08mm.

[0022] The first pressure-sensitive adhesive layer 2 and the second pressure-sensitive adhesive layer 5 are both modified acrylic pressure-sensitive adhesives. The first pressure-sensitive adhesive layer 2 is 0.05mm thick and is used to bond the release layer 1 and the elastic transition layer 3. The second pressure-sensitive adhesive layer 5 is 0.08mm thick and is used to bond the composite buffer foam core layer 4 and the camera module shell. The bonding strength is ≥2.8N / 25mm to ensure that it will not detach during long-term use.

[0023] The elastic transition layer 3 is made of EPDM film with an overall thickness of 0.12mm, a wave height of 0.08mm, a wave pitch of 0.3mm, and a Shore hardness of 40HA. The wave crest faces the composite buffer foam core layer 4, and the wave trough faces the first pressure-sensitive adhesive layer 2. When subjected to vertical impact, the wave-shaped structure can absorb more than 30% of the impact energy through compression deformation, preventing vibration from being transmitted to the camera module.

[0024] The composite cushioning foam core layer 4 is made of high-density PU foam with a thickness of 0.6mm. It has honeycomb array cushioning cavities 6 extending along the length direction, with a side length of 0.2mm and a distribution density of 18 cavities / cm². 2 The total volume of the buffer cavity accounts for 40% of the total volume of the composite buffer foam core layer 4; each buffer cavity is equipped with cross-shaped elastic ribs 7 made of nitrile rubber, with a diameter of 0.05mm. The two ends are fixedly connected to the inner wall of the buffer cavity, which can avoid deformation failure caused by excessive compression of the buffer cavity, and at the same time enhance the horizontal vibration resistance of the composite buffer foam core layer 4.

[0025] The two sides of the composite cushioning foam core layer 4 are wrapped with elastic edge strips 8 made of nitrile rubber. The elastic edge strips 8 are 0.6 mm thick and 0.1 mm wide. They can prevent the edges from breaking after the tape is cut. In addition, during the winding and transportation process, the elastic edge strips 8 can reduce the wear of the composite cushioning foam core layer 4, and the cushioning performance decay rate is ≤12%.

[0026] The shock-absorbing foam tape of this embodiment can effectively absorb drop impacts and daily vibrations during the installation of mobile phone camera modules. The lens offset of the camera module is ≤0.02mm, and the image acquisition clarity is not reduced. Compared with traditional foam tape, the impact resistance life of the camera module is increased by more than 2 times.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed 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 connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] 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 process, method, article, or apparatus.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A shock-absorbing foam tape, characterized in that, The material includes a release layer (1), a first pressure-sensitive adhesive layer (2), an elastic transition layer (3), a composite cushioning foam core layer (4), and a second pressure-sensitive adhesive layer (5) stacked sequentially along the thickness direction; the overall width of the foam tape is 5 mm; the composite cushioning foam core layer (4) has a honeycomb array of buffer cavities (6) extending along the length of the tape, and each buffer cavity has cross-shaped elastic ribs (7); the elastic transition layer (3) has a continuous wave-shaped layered structure, and the peaks of the elastic transition layer (3) face the composite cushioning foam core layer (4), while the troughs face the first pressure-sensitive adhesive layer (2).

2. The shock-absorbing foam tape according to claim 1, characterized in that, The composite cushioning foam core layer (4) is made of high-density PU foam with an overall thickness of 0.3 to 1.0 mm; the honeycomb array cushioning cavity (6) has a single cross-section of a regular hexagon with a side length of 0.1 to 0.3 mm; the elastic rib is made of nitrile rubber with a diameter of 0.03 to 0.08 mm, and the two ends of the elastic rib are fixedly connected to the relative inner walls of the cushioning cavity.

3. The shock-absorbing foam tape according to claim 1, characterized in that, The elastic transition layer (3) is made of EPDM film with an overall thickness of 0.08 to 0.2 mm; the wave height of the elastic transition layer (3) is 0.05 to 0.1 mm, the wave pitch is 0.2 to 0.5 mm, and the Shore hardness of the elastic transition layer (3) is 30 to 50 HA.

4. The shock-absorbing foam tape according to claim 1, characterized in that, Both sides of the composite cushioning foam core layer (4) are wrapped with elastic edge strips (8). The material of the elastic edge strips (8) is the same as that of the elastic ribs, and the thickness of the elastic edge strips (8) is the same as that of the composite cushioning foam core layer (4), with a width of 0.05 to 0.15 mm.

5. The shock-absorbing foam tape according to claim 1, characterized in that, The upper surface of the release layer (1) is provided with spaced positioning reference lines (9) along the length direction. The width of the positioning reference lines (9) is 0.02 to 0.05 mm, the spacing between adjacent positioning reference lines (9) is 10 to 20 mm, and the extension direction of the positioning reference lines (9) is parallel to the width direction of the tape.

6. The shock-absorbing foam tape according to claim 5, characterized in that, The release layer (1) is made of PET release film or single-sided release paper, with a thickness of 0.03 to 0.1 mm.

7. The shock-absorbing foam tape according to claim 1, characterized in that, The first pressure-sensitive adhesive layer (2) and the second pressure-sensitive adhesive layer (5) are both made of modified acrylic pressure-sensitive adhesive, and the thickness of the first pressure-sensitive adhesive layer (2) is 0.03-0.08 mm, and the thickness of the second pressure-sensitive adhesive layer (5) is 0.05-0.1 mm.

8. The shock-absorbing foam tape according to claim 2, characterized in that, The honeycomb array buffer cavities (6) are distributed at a density of 10-25 cavities / cm² within the composite buffer foam core layer (4). 2 Furthermore, the total volume of the buffer cavity accounts for 30% to 50% of the total volume of the composite buffer foam core layer (4).

9. The shock-absorbing foam tape according to claim 5, characterized in that, The positioning reference line (9) is marked with white ink or yellow fluorescent ink, and the color contrast between the positioning reference line (9) and the release layer (1) body is ≥80%.

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