Multifunctional tempered glass film

Abstract

The utility model relates to a multifunctional tempered glass film, and belongs to the technical field of screen protection. The film comprises a laminated structure of a basic protective layer (1), a functional protective layer (2), a first separation layer (3) and a second separation layer (4). The basic protection layer (1) is a high-transmittance tempered glass base material, and the functional protection layer (2) is reversibly adhered to the surface of the basic layer through the peel strength of 0.5-5N / cm, so that lossless peeling of the functional layer after long-term use is realized. The first separation layer (3) is arranged on the bottom surface of the base layer for initial film pasting, and the second separation layer (4) covers the surface of the functional layer to provide transportation protection. When a user uses the device in stages, the first separation layer is removed to attach the base layer, and the functional layer is reserved or removed according to requirements. According to the scheme, through scientific bonding parameters and layered structure design, the problems that a traditional tempered film is single in function and high in replacement cost are solved, flexible combination of basic protection and function expansion is achieved, material consumption is reduced, and use convenience is improved.

Description

Technical Field

[0001] This utility model relates to the field of mobile phone film, and in particular to a multifunctional tempered glass film. Background Technology

[0002] Existing tempered glass screen protectors typically use a single protective layer design. Users must completely replace the entire screen protector when they need to adjust screen features (such as privacy, matte finish, or blue light filtering). This type of structure has significant drawbacks:

[0003] 1. Limited functionality: Functional switching can only be achieved by replacing the entire film, resulting in economic costs and resource waste in high-frequency use scenarios;

[0004] 2. Poor layer compatibility: Some attempts at layer bonding fail to control peel strength (e.g., using ordinary bonding adhesive), resulting in adhesive residue or damage to the base film when the functional layer is removed;

[0005] 3. Operational redundancy: The functional layer and the base layer are installed at the same time, making it impossible to utilize the long-term protective properties of the base film and the replaceable characteristics of the functional layer in stages. Utility Model Content

[0006] In view of the above situation, it is necessary to provide a multifunctional tempered glass film that solves at least one of the above problems, comprising the following sequentially stacked components:

[0007] Basic protective layer: tempered glass substrate with high light transmittance;

[0008] A functional protective layer is bonded and fixed to the first surface of the base protective layer;

[0009] A first separation layer is removably disposed on the second surface opposite the base protective layer and the functional protective layer;

[0010] The second separation layer is the outermost layer covering the functional protective layer;

[0011] The peel strength between the functional protective layer and the basic protective layer is set to a range of 0.5-5 N / cm.

[0012] Preferably, the functional protective layer is made of at least one flexible material selected from soft PVC, PET, EPU, and TPU.

[0013] Preferably, a masking printing layer is provided around the outer periphery of the base protective layer, and the width of the masking printing layer is in the range of 0.5%-5% of the total width of the base protective layer.

[0014] Preferably, the surface of the functional protective layer has at least one camera hole slot.

[0015] Preferably, the first separation layer is a silicone-coated release film substrate.

[0016] Preferably, the second separation layer is a biaxially oriented polyester film.

[0017] Preferably, the masking printing layer is a black ink layer formed by screen printing.

[0018] Preferably, the camera hole slot includes a rounded corner structure, and the radius of curvature of each rounded corner is 0.5-2mm.

[0019] Preferably, the thickness of the basic protective layer is 0.2-0.7 mm, and the thickness of the functional protective layer is 50-200 μm. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the multifunctional tempered glass film according to an embodiment of the present invention.

[0021] Figure 2 This is a schematic diagram of the basic protective layer and the functional protective layer of this utility model embodiment. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description of the multifunctional tempered glass film of this utility model is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit its scope.

[0023] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "center," "longitudinal," "lateral," "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship 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," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] 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.

[0025] Please see Figure 1 as well as Figure 2 A multifunctional tempered glass film according to an embodiment of the present invention is characterized in that it comprises the following layers stacked in sequence: a base protective layer (1), a tempered glass substrate with high light transmittance; a functional protective layer (2), a peelable structure bonded and fixed to a first surface of the base protective layer (1); a first separation layer (3), removably attached to a second surface opposite to the functional protective layer (2) of the base protective layer (1); and a second separation layer (4), covering the outer surface of the functional protective layer (2); wherein the peel strength between the functional protective layer (2) and the base protective layer (1) is set to a value in the range of 0.5-5 N / cm.

[0026] The base protective layer (1) uses a high-transmittance tempered glass substrate as the core protective structure to provide impact and scratch resistance. The functional protective layer (2) is fixed to the base protective layer (1) by a peelable structure with an adhesive strength of 0.5-5 N / cm. Users can peel it off in stages according to their needs: before first use, remove the first separation layer (3) to expose the adhesive surface of the base protective layer (1) for film application. After long-term use, the functional protective layer (2) can be removed, leaving only the transparent protection of the base protective layer (1). The second separation layer (4) protects the surface of the functional protective layer (2) during transportation and storage, preventing scratches. The limit on peel strength ensures the stability of the functional protective layer (2) during use and ensures that the base protective layer (1) is not damaged during peeling.

[0027] Please see Figure 1 as well as Figure 2 In another embodiment, the functional protective layer (2) is made of at least one flexible material selected from soft PVC, PET, EPU and TPU.

[0028] The functional protective layer (2) is made of soft PVC, PET, EPU, or TPU. For example, composite TPU material can provide anti-fingerprint, anti-glare, or matte finishes. Its flexibility prevents bubbles from forming when it is attached to the base protective layer (1) and allows users to peel it off easily. For example, an anti-blue light functional layer made of EPU material can reduce the blue light transmittance of the screen by 30%-40%.

[0029] Please see Figure 1 as well as Figure 2 In another embodiment, a masking printing layer (5) is provided around the outer periphery of the base protective layer (1), and the width of the masking printing layer (5) is in the range of 0.5%-5% of the total width of the base protective layer (1).

[0030] The masking printing layer (5) forms a ring-shaped masking band along the outer edge of the base protective layer (1) through a screen printing process. The width is set to 0.5%-5% of the width of the mobile phone screen bezel (e.g., 1.2mm wide). This not only masks the screen edge adhesive layer to improve aesthetics but also avoids covering the effective display area. The masking layer uses black matte ink to reduce ambient light reflection.

[0031] Please see Figure 1 as well as Figure 2 In another embodiment, at least one camera hole slot (6) is formed on the surface of the functional protective layer (2).

[0032] The camera hole slot (6) is made to provide light transmission to the front camera of the mobile phone. For example, a circular slot with a diameter of 4.5mm is laser-cut into the functional protective layer (2) to ensure that the light transmittance of the camera area is ≥95%. The edges of the slot are chamfered to avoid stress concentration and cracking.

[0033] Please see Figure 1 as well as Figure 2 In another embodiment, the first separation layer (3) is a silicone release film substrate.

[0034] The first separation layer (3) uses a silicone-coated release film, whose silicone oil coating reduces the adhesion to the base protective layer (1) (peel force <0.2 N / cm), allowing for easy removal with one hand. For example, using 80 g / m 2 The glassine release film leaves no adhesive residue upon removal.

[0035] Please see Figure 1 as well as Figure 2 In another embodiment, the second separation layer (4) is a biaxially oriented polyester film.

[0036] The separation layer (4) is made of biaxially oriented PET film with a thickness of 50 μm. Its high transparency (transmittance ≥90%) ensures the user identification function. The protective layer (2) has a surface condition (such as frosted / gloss). No tools are required when peeling it off, and the peeling force is controlled at 0.3-0.8 N / cm.

[0037] Please see Figure 1 as well as Figure 2 In another embodiment, the masking printing layer (5) is a black ink layer formed by screen printing.

[0038] The masking printing layer (5) is formed by printing black UV-cured ink through a 300-mesh screen. The printing accuracy error is ≤0.1mm and the ink thickness is 10-15μm. While covering the adhesive on the edge of the mobile phone screen, it does not increase the overall thickness of the glass film. The matte surface reduces reflective interference.

[0039] Please see Figure 1 as well as Figure 2 In another embodiment, the camera hole slot (6) includes a rounded corner structure (7) with a radius of curvature of 0.5-2mm for each rounded corner.

[0040] The rounded corner structure (7) at the edge of the camera aperture slot (6) is formed by laser engraving with a radius of curvature of 1.2mm, avoiding stress concentration problems caused by right-angle cuts and reducing the risk of edge cracking when the functional protective layer (2) is peeled off. The rounded corner structure also improves the uniformity of light refraction at the edge of the aperture slot, avoiding distortion of the camera image.

[0041] Please see Figure 1 as well as Figure 2 In another embodiment, the thickness of the basic protective layer (1) is 0.2-0.7 mm, and the thickness of the functional protective layer (2) is 50-200 μm.

[0042] When the base protective layer (1) is 0.3mm thick, its impact resistance can reach level 9H. Combined with the functional protective layer (2) made of 100μm thick TPU material (e.g., Shore hardness 85A), the overall film thickness is controlled within 0.4mm to maintain screen touch sensitivity (touch response error <1ms). Too thin or too thick a film will cause the film to be fragile or cause touch delay.

[0043] In summary, this solution achieves a balance between the functional expandability, ease of use, and protective performance of tempered glass film through a layered peel-off structure (basic protective layer (1) + functional protective layer (2)) and material parameter limitations.

[0044] Peelable structure: Users can adjust the functional layers without replacing the entire film, reducing costs;

[0045] Flexible functional layer material selection: improving scratch resistance and integrating additional functions;

[0046] Masking printing parameters: Optimize display effect and production process efficiency;

[0047] Hole and slot structure design: to ensure optical performance and mechanical reliability;

[0048] Separator selection: Simplify the film application process and protect the functional layers;

[0049] Thickness parameter limitation: the physical basis for ensuring touch sensitivity.

[0050] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A multi-functional tempered glass film, characterized by, The application relates to a protective layer for a camera, which comprises, in sequence: a base protective layer (1) of high-transparency tempered glass; a functional protective layer (2) of a peelable structure fixed to the first surface of the base protective layer (1); a first separation layer (3) removably attached to the second surface of the base protective layer (1) opposite to the functional protective layer (2); and a second separation layer (4) covering the outer surface of the functional protective layer (2); wherein the peel strength between the functional protective layer (2) and the base protective layer (1) is set to be in the range of 0.5-5 N / cm.

2. The multi-functional tempered glass film according to claim 1, wherein, The outer periphery of the base protective layer (1) is provided with a shielding printing layer (5), and the width of the shielding printing layer (5) accounts for 0.5%-5% of the total width of the base protective layer (1).

3. The multi-functional tempered glass film according to claim 1, wherein, The surface of the functional protective layer (2) is provided with at least one camera hole slot (6).

4. The multi-functional tempered glass film according to claim 1, wherein, The first separation layer (3) is a silicon-coated release film substrate.

5. The multi-functional tempered glass film according to claim 1, wherein, The second separation layer (4) is a biaxially stretched polyester film.

6. The multi-functional tempered glass film according to claim 2, wherein, The shielding printing layer (5) is a black ink layer formed by a silk screen printing process.

7. The multi-functional tempered glass film according to claim 3, wherein, The camera hole slot (6) comprises a rounded corner structure (7), and the curvature radius of each rounded corner is 0.5-2 mm.

8. The multi-functional tempered glass film according to claim 1, wherein, The thickness of the base protective layer (1) is 0.2-0.7 mm, and the thickness of the functional protective layer (2) is 50-200 mu m.

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