Double-layer tempered glass film

Abstract

The utility model discloses a double-layer toughened glass film, which relates to the technical field of toughened glass films and comprises a first toughened glass film layer and a second toughened glass film layer, the adhesive layer is an ab optical adhesive layer and is sequentially composed of a first oca optical adhesive layer, a pet base material and a first silica gel layer from top to bottom, the adhesive layer is arranged on the lower surface of the first tempered glass film layer, and the first oca optical adhesive layer is attached to the first tempered glass film layer; the stress dispersion layer is a polyimide film layer, the stress dispersion layer is arranged on the lower surface of the adhesive layer, the upper surface of the stress dispersion layer is attached to the lower surface of the first tempered glass film layer through a first silica gel layer, and a second silica gel layer is arranged on the lower surface of the stress dispersion layer; the second tempered glass film layer is arranged on the lower surface of the stress dispersion layer; the synergistic effect of the double-layer structure and the stress dispersion layer can better cope with instant large impact force.

Description

Technical Field

[0001] This utility model relates to the field of tempered glass film technology, specifically a double-layer tempered glass film. Background Technology

[0002] With the rapid development of modern technology, electronic devices such as smartphones, tablets, smartwatches, and laptops have become indispensable tools in people's daily lives and work. The screens of these electronic devices, as key components for information display and user interaction, are of paramount importance in terms of both performance and aesthetics.

[0003] In everyday use, electronic device screens face a variety of potential threats. For example, during transport, the screen may rub against hard objects such as keys or coins in a pocket, causing scratches. Even minor scratches can affect the screen's visual clarity under light reflection, and over time, these scratches may gradually increase and deepen, severely damaging the screen's display quality and aesthetics.

[0004] Furthermore, electronic devices are inevitably subject to accidental drops, collisions, or pressure during use. This is especially true in active usage scenarios, such as using electronic devices while working outdoors, exercising, or in crowded public places where devices may slip and fall. In such cases, the screen will withstand a significant instantaneous impact.

[0005] Traditional screen protection methods primarily rely on single-layer tempered glass screen protectors and ordinary plastic films. While single-layer tempered glass offers some hardness and can resist scratches, its simple structure and lack of effective stress dispersion mean that the impact force tends to concentrate at a single point or area, causing the glass to shatter and failing to adequately protect the screen. Ordinary plastic films, on the other hand, perform poorly in terms of hardness and impact resistance, making it difficult to meet the stringent screen protection requirements of modern electronic devices. These problems not only cause inconvenience and financial losses for users but also drive the industry to continuously explore more efficient and reliable screen protection technologies and products.

[0006] Therefore, it is necessary to propose an improved technical solution to address the above problems. Utility Model Content

[0007] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0008] A double-layer tempered glass film, comprising:

[0009] First tempered glass film layer;

[0010] An adhesive layer, wherein the adhesive layer is an AB optical adhesive layer, which is composed of a first OCA optical adhesive layer, a PET substrate, and a first silicone layer from top to bottom. The adhesive layer is disposed on the lower surface of the first tempered glass film layer, wherein the first OCA optical adhesive layer is bonded to the first tempered glass film layer.

[0011] A stress-dispersing layer, wherein the stress-dispersing layer is a polyimide film layer, the stress-dispersing layer is disposed on the lower surface of the adhesive layer, the upper surface of the stress-dispersing layer is bonded to the lower surface of the first tempered glass film layer through a first silicone layer, wherein a second silicone layer is disposed on the lower surface of the stress-dispersing layer.

[0012] The second tempered glass film layer is disposed on the lower surface of the stress dispersion layer, and the upper surface of the second tempered glass film layer is bonded to the lower surface of the stress dispersion layer by a second silicone layer. The lower surface of the second tempered glass film layer is provided with a second OCA optical adhesive layer.

[0013] A release film layer is disposed on the lower surface of the second tempered glass film layer, and the upper surface of the release film layer is bonded to the lower surface of the second tempered glass film layer by a second OCA optical adhesive layer.

[0014] As a further aspect of this utility model: the second silicone layer is low-viscosity silicone.

[0015] As a further embodiment of this utility model: the stress dispersion layer adopts a multi-layer composite structure, which includes a core polyimide base layer and a buffer elastomer layer located on the upper and lower surfaces of the base layer, the buffer elastomer layer being made of rubber material.

[0016] As a further aspect of this utility model: the PET substrate has multiple micro air channels distributed inside, and the multiple micro air channels are arranged in a uniform grid pattern inside the PET substrate.

[0017] As a further aspect of this utility model: the upper surface of the first tempered glass film layer is coated with an anti-fingerprint nano-coating.

[0018] As a further embodiment of this utility model, an ultra-thin optical anti-reflective film layer is also provided between the first OCA optical adhesive layer and the first tempered glass film layer.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] 1) The design of the double-layer tempered glass screen protector greatly enhances its scratch resistance. The first tempered glass layer can resist most minor daily scratches. Even if some minor scratches appear on the surface of the first tempered glass layer after long-term use, the second tempered glass layer can still continue to protect the screen, ensuring that the visual clarity of the screen under light reflection is not significantly affected, and always maintains good display effect and aesthetics, greatly extending the effective protection period of the screen in terms of scratch resistance.

[0021] 2) The double-layer tempered glass screen protector exhibits superior impact resistance. Compared with traditional single-layer tempered glass screen protectors, its double-layer structure and the synergistic effect of the stress-dispersing layer can better cope with large instantaneous impacts. When an impact is received, the stress-dispersing layer quickly disperses the concentrated impact force, while the double-layer tempered glass screen protector layers bear and buffer the remaining impact force from different levels, effectively reducing the peak stress on the screen and greatly reducing the risk of screen breakage. This provides more reliable and comprehensive protection for electronic device screens, reducing equipment repair costs and inconvenience caused by screen damage.

[0022] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the hierarchical distribution structure of this utility model;

[0026] Figure 3 This is a schematic diagram of the hierarchical distribution structure of the stress dispersion layer of this utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the PET substrate of this utility model.

[0028] The reference numerals and names in the figure are as follows:

[0029] 1. First tempered glass film layer; 2. Adhesive layer; 3. First OCA optical adhesive layer; 4. PET substrate; 5. First silicone layer; 6. Stress dispersion layer; 7. Second silicone layer; 8. Second tempered glass film layer; 9. Second OCA optical adhesive layer; 10. Release film layer; 11. Polyimide base layer; 12. Cushioning elastomer layer; 13. Air channel; 14. Anti-fingerprint nano-coating; 15. Optical anti-reflective film layer. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see Figure 1-4 In this embodiment of the utility model, a double-layer tempered glass film includes:

[0032] First tempered glass film layer 1;

[0033] Adhesive layer 2, the adhesive layer 2 is an AB optical adhesive layer, which is composed of a first OCA optical adhesive layer 3, a PET substrate 4 and a first silicone layer 5 from top to bottom. The adhesive layer 2 is disposed on the lower surface of the first tempered glass film layer 1, wherein the first OCA optical adhesive layer 3 is bonded to the first tempered glass film layer 1.

[0034] The stress dispersion layer 6 is a polyimide film layer. The stress dispersion layer 6 is disposed on the lower surface of the adhesive layer 2. The upper surface of the stress dispersion layer 6 is bonded to the lower surface of the first tempered glass film layer 1 through the first silicone layer 5. The lower surface of the stress dispersion layer 6 is provided with a second silicone layer 7.

[0035] The second tempered glass film layer 8 is disposed on the lower surface of the stress dispersion layer 6, and the upper surface of the second tempered glass film layer 8 is bonded to the lower surface of the stress dispersion layer 6 by the second silicone layer 7. The lower surface of the second tempered glass film layer 8 is provided with a second OCA optical adhesive layer 9.

[0036] Release film layer 10, the release film layer 10 is disposed on the lower surface of the second tempered glass film layer 8, and the upper surface of the release film layer 10 is bonded to the lower surface of the second tempered glass film layer 8 by a second OCA optical adhesive layer 9.

[0037] In this utility model technical solution, the first tempered glass film layer 1 serves as the first line of defense that directly contacts the external environment. With its high hardness, it can effectively resist minor scratches from hard objects such as keys and coins in pockets during daily use. The second tempered glass film layer 8 provides additional protective support when the first line of defense is breached or faces a large impact, thus forming a double-layer protection mechanism.

[0038] The AB optical adhesive layer plays a crucial role in the connection and buffering of the entire structure. The first OCA optical adhesive layer 3 is tightly bonded to the first tempered glass film layer 1, ensuring a strong connection between the two and not adversely affecting the screen display effect. It has good optical transparency and adhesion, and can effectively fill the small imperfections on the glass surface, making the bonding tighter. The PET substrate 4 is located in the middle of the adhesive layer 2. It has a certain degree of flexibility and elasticity. When subjected to external impact, it can deform moderately, thereby absorbing and dispersing some energy and reducing the direct impact of the impact on the glass film layer. The first silicone layer 5 further enhances the connection stability between the adhesive layer 2, the first tempered glass film layer 1, and the stress dispersion layer 6. At the same time, its soft texture helps to transfer and disperse stress between different layers, avoiding stress concentration in a certain local area.

[0039] The polyimide film layer, serving as the stress dispersion layer 6, is one of the core highlights of the entire design. Polyimide material itself possesses excellent mechanical properties, including high strength, high toughness, and good heat resistance. When the screen is subjected to external impact, the impact force first acts on the first tempered glass film layer 1, and then is transmitted to the stress dispersion layer 6 through the first silicone layer 5. With its own flexibility and high strength, the polyimide film layer can quickly disperse the concentrated impact force to a larger area, making the stress borne by the entire structure more uniform and effectively preventing glass breakage caused by excessive local stress. The second silicone layer 7 on its lower surface further optimizes the stress transmission effect between the stress dispersion layer 6 and the second tempered glass film layer 8, ensuring the formation of a continuous and stable stress dispersion path between different layers.

[0040] Release film layer 10 is disposed on the lower surface of the second tempered glass film layer 8. Before the product is used, it protects the second OCA optical adhesive layer 9 from dust, impurities, etc., thereby ensuring that the second OCA optical adhesive layer 9 can achieve good adhesion to the screen of electronic device when applying the film, ensuring the smooth progress of the film application process and the final adhesion effect.

[0041] In summary, the design of the double-layer tempered glass screen protector greatly enhances its scratch resistance. The first tempered glass layer 1 can resist most minor everyday scratches. Even after long-term use, when some minor scratches appear on the surface of the first tempered glass layer 1, the second tempered glass layer 8 can still continue to protect the screen, ensuring that the visual clarity of the screen under light reflection is not significantly affected, maintaining good display effect and aesthetics, and greatly extending the effective protection period of the screen in terms of scratch resistance. The double-layer tempered glass screen protector exhibits excellent impact resistance. Compared with traditional single-layer tempered glass screen protectors, its double-layer structure and the synergistic effect of the stress dispersion layer 6 can better cope with large instantaneous impacts. When an impact is received, the stress dispersion layer 6 quickly disperses the concentrated impact force, while the double tempered glass layers respectively bear and buffer the remaining impact force from different levels, effectively reducing the peak stress on the screen, greatly reducing the risk of screen breakage, providing more reliable and comprehensive protection for electronic device screens, and reducing equipment repair costs and inconvenience caused by screen damage.

[0042] In this embodiment of the present invention, the second silicone layer 7 is a low-viscosity silicone.

[0043] The second silicone layer 7 uses low-tack silicone, which forms a special connection with the first tempered glass film layer 1 and the stress-dispersing layer 6. Under normal use, this low adhesion is sufficient to maintain the synergistic work between the layers, ensuring the overall structure of the double-layer tempered glass film effectively protects the screen. When the first tempered glass film layer 1 is damaged, such as cracked or severely scratched and needs to be replaced, due to the low adhesion of the second silicone layer 7, when a certain external force is applied and it is torn in a specific direction (such as parallel to the screen surface), the first tempered glass film layer 1 can overcome the relatively weak adhesive force with the second silicone layer 7 and gradually separate. At the same time, this low adhesion also allows the stress-dispersing layer 6 to be torn off together with the first tempered glass film layer 1 in this process, because it is tightly connected to the first tempered glass film layer 1 through the first silicone layer 5. The characteristics of the first silicone layer 5 and the second silicone layer 7 work together to achieve the separability of the damaged layer while ensuring the stability of daily protection.

[0044] When the first tempered glass film layer 1 is damaged, only the first tempered glass film layer 1 and the stress-dispersing layer 6 can be peeled off, leaving the second tempered glass film layer 8 to continue providing secondary protection for the screen. This design makes screen protection flexible and multi-layered. For minor damage, it is not necessary to replace the entire double-layer tempered glass film immediately. The second tempered glass film layer 8 alone can maintain a certain level of protection, extending the lifespan of the entire film and reducing the cost of frequent film replacement. Users can choose to replace the entire film at a more appropriate time according to the actual situation, rather than replacing it all when the first tempered glass film layer 1 is slightly damaged, thus effectively saving resources and costs.

[0045] In this embodiment of the present invention, the stress dispersion layer 6 adopts a multi-layer composite structure, which includes a core polyimide base layer 11 and a buffer elastomer layer 12 located on the upper and lower surfaces of the base layer. The buffer elastomer layer 12 is made of rubber material.

[0046] The stress dispersion layer 6 in the double-layer tempered glass film adopts a multi-layer composite structure. The core polyimide base layer 11 provides a stable structure to uniformly disperse stress. The rubber buffer elastomer layers 12 (such as silicone rubber) on the upper and lower surfaces play a key role. Silicone rubber is a highly transparent rubber material with excellent optical properties. Silicone rubber also has good elasticity and flexibility. This structure works in synergy with the adhesive layer 2 and the double-layer tempered glass film to enhance impact resistance, significantly reduce the risk of screen breakage, effectively reduce the accumulation of microscopic damage inside the screen, maintain structural stability, extend the screen's lifespan, ensure a long-term clear and stable visual experience, reduce the frequency of user repair or replacement, and improve ease of use and satisfaction.

[0047] Specifically, when subjected to impact, the first silicone layer 5 in the adhesive layer 2 can effectively transfer the stress from the first tempered glass film layer 1 to the buffer elastomer layer 12 of the stress dispersion layer 6. Due to the elasticity of the buffer elastomer layer 12, it can better receive and buffer the transferred stress, avoiding abrupt changes or concentrations in stress during transmission. The lower surface of the stress dispersion layer 6 is connected to the second tempered glass film layer 8 through the second silicone layer 7. After the buffer elastomer layer 12 absorbs and disperses part of the impact force, the remaining stress is transferred to the second tempered glass film layer 8 through the second silicone layer 7. This multi-layered transmission and dispersion mechanism enables the entire double-layer tempered glass film structure to more effectively cope with impact forces of different intensities and protect the screen's safety.

[0048] In this embodiment of the present invention, a plurality of micro air channels 13 are distributed inside the PET substrate 4, and the plurality of micro air channels 13 are arranged in a uniform grid pattern inside the PET substrate 4.

[0049] In the adhesive layer 2, multiple micro air channels 13 uniformly distributed inside the PET substrate 4 form a structure similar to a "micro air cushion". When the double-layer tempered glass film is subjected to external pressure or impact, these micro air channels 13 are compressed. Air, as a compressible medium, is squeezed in the channels and absorbs part of the impact force, just like the shock absorber airbag in a car. The external force is buffered by the compression of air, so that the impact force is not directly transmitted to the lower screen. Furthermore, since the micro air channels 13 are arranged in a uniform grid pattern, they can provide a relatively balanced buffering effect in all directions. No matter whether the impact force comes from the vertical direction or the inclined direction, it can be effectively buffered by these uniformly distributed air channels 13.

[0050] In this embodiment of the present invention, the upper surface of the first tempered glass film layer 1 is coated with an anti-fingerprint nano-coating 14.

[0051] When using electronic devices daily, frequent finger contact with the screen leaves a lot of fingerprints. These fingerprints not only affect the screen's appearance but may also interfere with the visual experience to some extent. The anti-fingerprint nano-coating 14 can keep the screen surface clean and tidy at all times, eliminating the need for users to frequently wipe the screen to remove fingerprints and greatly improving the screen's appearance.

[0052] In this embodiment of the present invention, an ultra-thin optical anti-reflective film layer 15 is further provided between the first OCA optical adhesive layer 3 and the first tempered glass film layer 1.

[0053] Based on the design structure of the double-layer tempered glass film, the optical anti-reflective coating layer 15 can significantly improve the light transmittance of the screen, thereby benefiting the user experience.

[0054] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A double-layer tempered glass film, characterized in that, Including: First tempered glass film layer; An adhesive layer, wherein the adhesive layer is an AB optical adhesive layer, which is composed of a first OCA optical adhesive layer, a PET substrate, and a first silicone layer from top to bottom. The adhesive layer is disposed on the lower surface of the first tempered glass film layer, wherein the first OCA optical adhesive layer is bonded to the first tempered glass film layer. A stress-dispersing layer, wherein the stress-dispersing layer is a polyimide film layer, the stress-dispersing layer is disposed on the lower surface of the adhesive layer, the upper surface of the stress-dispersing layer is bonded to the lower surface of the first tempered glass film layer through a first silicone layer, wherein a second silicone layer is disposed on the lower surface of the stress-dispersing layer. The second tempered glass film layer is disposed on the lower surface of the stress dispersion layer, and the upper surface of the second tempered glass film layer is bonded to the lower surface of the stress dispersion layer by a second silicone layer. The lower surface of the second tempered glass film layer is provided with a second OCA optical adhesive layer. A release film layer is disposed on the lower surface of the second tempered glass film layer, and the upper surface of the release film layer is bonded to the lower surface of the second tempered glass film layer by a second OCA optical adhesive layer.

2. The double-layer tempered glass film according to claim 1, characterized in that, The second silicone layer is a low-viscosity silicone.

3. The double-layer tempered glass film according to claim 1, characterized in that, The stress dispersion layer adopts a multi-layer composite structure, which includes a core polyimide base layer and a buffer elastomer layer located on the upper and lower surfaces of the base layer. The buffer elastomer layer is made of rubber material.

4. The double-layer tempered glass film according to claim 1, characterized in that, The PET substrate has multiple micro air channels distributed inside, and these micro air channels are arranged in a uniform grid pattern inside the PET substrate.

5. The double-layer tempered glass film according to claim 1, characterized in that, The upper surface of the first tempered glass film layer is coated with an anti-fingerprint nano-coating.

6. The double-layer tempered glass film according to claim 1, characterized in that, An ultra-thin optical anti-reflective coating is also provided between the first OCA optical adhesive layer and the first tempered glass film layer.

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