High-bending acrylic pressure-sensitive adhesive tape
By introducing a high-strength glass fiber layer and high-bending components into the acrylic pressure-sensitive tape, the problem of tape breakage caused by stress concentration on foldable screen phones is solved, achieving stable fixation and multiple performance improvements in high-bending scenarios.
Patent Information
- Application Number
- CN202423209141.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2034-12-25
AI Technical Summary
Existing acrylic pressure-sensitive tapes, when used in high-bending scenarios with foldable screen phones, tend to concentrate stress on weak points, causing the tape to break, affecting the normal use of the phone, and may even damage internal precision components.
A high-bend acrylic pressure-sensitive tape was designed, comprising a base layer, a reinforcing fiber layer, and an acrylic pressure-sensitive adhesive layer from the inside out, and equipped with a high-bend assembly. The reinforcing fiber layer is woven from high-strength glass fiber, and the high-bend assembly includes flexible strips and nickel-titanium alloy wires. Combined with a thermally conductive silicone layer, a buffer layer, an antistatic layer, a moisture-proof layer, and a release layer, stress dispersion and protection are achieved.
It effectively disperses stress, reduces the risk of tape breakage, ensures stable fixation of the screen and internal components, improves product reliability and durability, and has multiple properties such as thermal conductivity, cushioning, antistatic properties, and moisture resistance, making it suitable for complex environments.
Smart Images
Figure CN223921333U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to pressure sensitive adhesive tape technical field especially relates to a high bending acrylic pressure sensitive adhesive tape. BACKGROUND
[0002] In today's electronic equipment and many precision manufacturing fields, the adhesive tape as a kind of key connection and fixing material plays an indispensable role. The traditional acrylic pressure sensitive adhesive tape is widely used in many scenes due to its good initial adhesion, for example, in the mobile phone assembly link, it is often used to stick mobile phone screens, to assist the accurate positioning of the screen. Although the existing acrylic pressure sensitive adhesive tape can meet the basic pasting requirements under normal working conditions, when subjected to frequent and large bending stress in the high bending use scene of folding screen mobile phone, stress is easily concentrated in some weak parts of the adhesive tape, thereby causing the adhesive tape to break, and the screen loses effective fixation instantaneously, which not only seriously affects the normal use of the mobile phone, but also may directly cause damage to the internal precision components of the mobile phone. Therefore, the utility model provides a high bending acrylic pressure sensitive adhesive tape. SUMMARY
[0003] The utility model aims at the problem that in the background art, although the acrylic pressure sensitive adhesive tape can meet the basic pasting requirements under normal working conditions, when subjected to frequent and large bending stress in the high bending use scene of folding screen mobile phone, stress is easily concentrated in some weak parts of the adhesive tape, thereby causing the adhesive tape to break, and the screen loses effective fixation instantaneously, which not only seriously affects the normal use of the mobile phone, but also may directly cause damage to the internal precision components of the mobile phone, and provides a high bending acrylic pressure sensitive adhesive tape.
[0004] The technical scheme of the utility model: a high bending acrylic pressure sensitive adhesive tape, comprising: base layer, reinforcing fiber layer and acrylic pressure sensitive adhesive layer arranged in sequence from inside to outside, the base layer is flexible polymer film, and the thickness is between 20 to 50 microns;The reinforcing fiber layer is made of high-strength glass fiber and is distributed in a grid shape, and the thickness is between 15 to 30 microns;The acrylic pressure sensitive adhesive layer is made of acrylate copolymer, and the thickness is between 50 to 100 microns;High bending assembly is arranged on both sides of the adhesive tape to provide high bending performance.
[0005] Optionally, the high bending assembly comprises a flexible clamping strip, the flexible clamping strip is arranged along the length direction of the adhesive tape, and the material is high-elasticity rubber material, the flexible clamping strip is internally provided with a flexible wire, and the flexible wire is a shape memory function nickel-titanium alloy wire.
[0006] Optionally, a heat-conducting silica gel layer is arranged on the outer side of the base layer, the heat-conducting silica gel layer is based on silica gel, internally filled with appropriate heat-conducting filler alumina powder, and the thickness is between 10 to 80 microns.
[0007] Optionally, a buffer layer is provided between the base layer and the thermally conductive silicone layer. The buffer layer is made of soft and elastic polyurethane foam with a thickness of 30 to 60 micrometers.
[0008] Optionally, an antistatic layer is provided on the outer side of the thermally conductive silicone layer. The antistatic layer is a polyethylene film containing an antistatic agent with a thickness between 20 and 40 micrometers.
[0009] Optionally, a moisture-proof layer is provided on the outside of the antistatic layer, and the moisture-proof layer is made of aluminum foil with a thickness of 10 to 20 micrometers.
[0010] Optionally, the outer side of the moisture-proof layer is coated with a protective spray material, and the protective spray material is made of polyurethane.
[0011] Optionally, the flexible strip has a "convex" shaped structure to facilitate snapping it between the acrylic pressure-sensitive adhesive layer and the protective film layer.
[0012] Optionally, a release layer is provided on the inner side of the acrylic pressure-sensitive adhesive layer. The release layer is an organosilicon release film with a thickness ranging from 10 to 30 micrometers.
[0013] In summary, this application includes at least one of the following beneficial technical effects:
[0014] This invention, by sequentially setting a base layer, a reinforcing fiber layer, and an acrylic pressure-sensitive adhesive layer from the inside out, and equipped with a unique high-bending component, enables the tape to effectively disperse stress when facing frequent and large bending stress, avoiding stress concentration in weak parts, greatly reducing the risk of tape breakage, and perfectly adapting to high-bending scenarios such as foldable screen phones, ensuring the stable fixation of the screen and internal precision components, and greatly improving the reliability and durability of the product.
[0015] Furthermore, this utility model effectively conducts heat through a thermally conductive silicone layer on the outer side of the base layer, preventing the tape from affecting its adhesive performance due to overheating; a buffer layer cushions external impacts and protects the base layer; an antistatic layer prevents static electricity accumulation from damaging electronic equipment; a moisture-proof layer prevents moisture erosion; a protective film layer prevents damage to the tape before use; and a release layer facilitates the use and storage of the tape. This comprehensive design safeguards the application of tape in precision electronic equipment, expands the tape's applicability, and enhances its overall performance. Attached Figure Description
[0016] Figure 1 A structural schematic diagram of a high-bending acrylic pressure-sensitive tape according to this utility model is provided;
[0017] Figure 2 yes Figure 1 A partial diagram of the split structure;
[0018] Figure 3 yes Figure 2 Diagram of the split structure in the middle.
[0019] Figure label:
[0020] 1. Base layer; 2. Reinforcing fiber layer; 3. Acrylic pressure-sensitive adhesive layer;
[0021] 4. High bending radius components; 41. Flexible clamping strips; 42. Flexible wires;
[0022] 5. Thermally conductive silicone layer; 6. Buffer layer; 7. Antistatic layer; 8. Moisture-proof layer; 9. Release layer. Detailed Implementation
[0023] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.
[0024] The components of the present invention embodiments described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.
[0025] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," 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 do not 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example
[0028] like Figure 1 and Figure 2 As shown, this utility model proposes a high-bending acrylic pressure-sensitive tape, comprising: a base layer 1, a reinforcing fiber layer 2, and an acrylic pressure-sensitive adhesive layer 3 arranged sequentially from the inside out. The base layer 1 is a flexible polymer film with a thickness between 20 and 50 micrometers. This film has good flexibility and tensile strength, providing basic support for the entire tape structure. The reinforcing fiber layer 2 is woven from high-strength glass fiber in a grid pattern, with a thickness between 15 and 30 micrometers, ensuring that the tensile and tear resistance of the tape is effectively improved without increasing the thickness excessively. The acrylic pressure-sensitive adhesive layer 3 is made of acrylate copolymer and has a thickness between 50 and 100 micrometers, ensuring that the tape has suitable tack and adhesion. High-bending components 4 are disposed on both sides of the tape to provide high bending flexibility.
[0029] like Figure 2 As shown, the high bending component 4 includes a flexible strip 41, which is arranged along the length of the tape and is made of a highly elastic rubber material to ensure that it can provide high bending performance without affecting other properties of the tape. The flexible strip 41 is provided with a flexible wire 42, which is a nickel-titanium alloy wire with shape memory function to ensure that it can perform its shape memory assisted bending function normally.
[0030] like Figures 1 to 3 As shown, a thermally conductive silicone layer 5 is provided on the outer side of the base layer 1. The thermally conductive silicone layer 5 is based on silicone and filled with an appropriate amount of thermally conductive alumina powder. The thickness is between 10 and 80 micrometers, which gives it good thermal conductivity so that the tape can effectively dissipate heat in certain application scenarios.
[0031] Furthermore, a buffer layer 6 is provided between the base layer 1 and the thermally conductive silicone layer. The buffer layer 6 is made of soft and elastic polyurethane foam with a thickness of 30 to 60 micrometers, which serves to buffer external impacts and protect the internal structure.
[0032] Secondly, an antistatic layer 7 is provided on the outside of the thermally conductive silicone layer 5. The antistatic layer 7 is a polyethylene film containing an antistatic agent with a thickness of 20 to 40 micrometers. It is bonded to the outside of the thermally conductive silicone layer 5 through a composite process to prevent problems caused by static electricity accumulation during the use of the tape.
[0033] Furthermore, a moisture-proof layer 8 is provided on the outside of the antistatic layer 7. The moisture-proof layer 8 is made of aluminum foil and has a thickness of 10 to 20 micrometers, which effectively blocks the intrusion of external moisture and protects the internal structure of the tape.
[0034] In addition, the outer side of the moisture-proof layer 8 is coated with a protective spray material made of polyurethane, which has good flexibility and elasticity. It can deform accordingly with the bending of the tape, and is not prone to cracking or falling off. It always maintains complete protective performance and provides reliable protection for the tape under high bending conditions.
[0035] In addition, the flexible clip 41 has a "convex" shaped structure, which makes it easy to snap between the acrylic pressure-sensitive adhesive layer 3 and the protective film layer, making the connection more stable and avoiding deformation and gaps after bending.
[0036] Finally, a release layer 9 is provided on the inner side of the acrylic pressure-sensitive adhesive layer 3. The release layer 9 is an organosilicon release film with a thickness ranging from 10 to 30 micrometers, which facilitates the separation of the tape before storage and use.
[0037] The working principle of this embodiment is as follows: First, the base layer 1 serves as the basic support part of the entire tape. With its good flexibility and tensile strength, it can bear the force from the outside and distribute the force evenly, ensuring that the tape will not break easily under different bending conditions and maintaining the integrity of the overall structure. The flexible polymer film material enables it to adapt to various shape changes.
[0038] The high-strength glass fibers in the reinforcing fiber layer 2 are distributed in a grid pattern. When the tape is stretched or torn, the grid structure acts like fine bones and muscles, effectively resisting external forces, preventing the generation and spread of cracks, and further improving the mechanical properties of the tape, so that the tape remains reliable under high-load usage scenarios.
[0039] The acrylic pressure-sensitive adhesive layer 3 utilizes the properties of acrylate copolymers to provide suitable tack and adhesion, enabling it to adhere tightly to the surface of the object being bonded. When the tape is used for fixing, connecting, or other operations, this layer ensures a strong bond between the tape and the target object, guaranteeing a successful connection.
[0040] The high-bending component 4 is key to achieving the high bending performance of the tape. The flexible retaining strip 41 is arranged along the length of the tape, and its highly elastic rubber material allows the tape to deform freely during bending without hindering its overall performance. The internal nickel-titanium alloy flexible wire 42 utilizes shape memory to assist the flexible retaining strip during bending, making it easier to achieve the predetermined bending angle. Furthermore, it quickly recovers its shape after bending, ensuring performance stability after multiple bends.
[0041] When dissipating heat, such as near the heat dissipation module of electronic devices, the alumina powder filled in the thermally conductive silicone layer 5 can quickly conduct heat. The silicone, as a base, ensures good adhesion and dissipates heat in time, preventing the tape from affecting its performance or causing adverse effects on the adhered parts due to overheating.
[0042] The polyurethane foam material of buffer layer 6 is soft and elastic. When the tape is subjected to external impact, such as collision or squeezing, the buffer layer absorbs the impact force like a sponge, preventing the impact force from being directly transmitted to the internal base layer, reinforcing fiber layer and other key structures, effectively protecting the internal structure from damage.
[0043] The antistatic layer 7 is a polyethylene film containing antistatic agents that continuously releases antistatic ions to neutralize the static charge generated by friction during the use of the tape. This prevents problems such as dust accumulation and interference with electronic components caused by static accumulation, ensuring that the tape works normally in static-sensitive environments.
[0044] The aluminum foil material of the moisture barrier 8 forms a barrier. When external moisture tries to penetrate, the aluminum foil blocks the moisture with its density, preventing moisture from penetrating into the interior and reducing the tape's adhesion, causing the structure to become damp and deteriorate, etc., thus ensuring the tape's stable performance in humid environments.
[0045] The protective spray is made of polyurethane and adheres tightly to the outside of the moisture-proof layer. As the tape is bent, it deforms synchronously using its good flexibility and elasticity to fill the tiny gaps created by the bend, preventing external substances from intruding and providing comprehensive protection for the internal structure of the tape at all times.
[0046] During the tape storage stage, the release layer 9 utilizes the low surface energy characteristics of the silicone release film to facilitate the separation of the tape from the protective film, making preparations before use easier and ensuring that the tape is readily available and ready for immediate use.
[0047] In summary, this high-bending acrylic pressure-sensitive tape achieves reliable operation under high bending requirements and complex environments through the collaborative efforts of its various structural layers, meeting the requirements of a variety of application scenarios.
[0048] The above specific embodiments are merely optional embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.
Claims
1. A high-bend acrylic pressure-sensitive tape, characterized in that, include: The layers arranged from the inside out are a base layer (1), a reinforcing fiber layer (2), and an acrylic pressure-sensitive adhesive layer (3). The base layer (1) is a flexible polymer film with a thickness between 20 and 50 micrometers. The reinforcing fiber layer (2) is woven from high-strength glass fibers in a mesh-like distribution, with a thickness between 15 and 30 micrometers. The acrylic pressure-sensitive adhesive layer (3) is made of acrylic copolymer and has a thickness of 50 to 100 micrometers; High bending components (4) are provided on both sides of the tape to provide high bending performance. The high bending components (4) include flexible strips (41) arranged along the length of the tape and made of highly elastic rubber material. Flexible wires (42) are provided inside the flexible strips (41). The flexible wires (42) are nickel-titanium alloy wires with shape memory function.
2. The high-bend acrylic pressure-sensitive tape according to claim 1, characterized in that, A thermally conductive silicone layer (5) is provided on the outer side of the base layer (1), and the thickness is between 10 and 80 micrometers.
3. The high-bend acrylic pressure-sensitive tape according to claim 1, characterized in that, A buffer layer (6) with a thickness of 30 to 60 micrometers is provided between the base layer (1) and the thermally conductive silicone layer.
4. The high-bend acrylic pressure-sensitive tape according to claim 2, characterized in that, An antistatic layer (7) with a thickness of 20 to 40 micrometers is provided on the outer side of the thermally conductive silicone layer (5).
5. The high-bend acrylic pressure-sensitive tape according to claim 4, characterized in that, The antistatic layer (7) is provided with a moisture-proof layer (8) on the outside, and the moisture-proof layer (8) is made of aluminum foil with a thickness of 10 to 20 micrometers.
6. The high-bend acrylic pressure-sensitive tape according to claim 5, characterized in that, The outer side of the moisture-proof layer (8) is coated with a protective spray material, which is made of polyurethane.
7. The high-bend acrylic pressure-sensitive tape according to claim 2, characterized in that, The flexible card strip (41) has a "convex" shaped structure, which makes it easy to snap onto the acrylic pressure-sensitive adhesive layer (3) and the protective film layer.
8. The high-bend acrylic pressure-sensitive tape according to claim 1, characterized in that, The inner side of the acrylic pressure-sensitive adhesive layer (3) is provided with a release layer (9), which is an organosilicon release film with a thickness ranging from 10 to 30 micrometers.