Flexible anti-static protective film

Abstract

The utility model relates to the technical field of protective films, in particular to a flexible anti-static protective film which comprises a protective film body, the protective film body comprises a base layer, a first bonding layer is bonded on the lower surface of the base layer, a middle layer is bonded on the lower surface of the first bonding layer, and a second bonding layer is bonded on the lower surface of the middle layer. According to the flexible anti-static protective film, the protective film body, the base layer, the first bonding layer, the middle layer, the second bonding layer and the surface layer are used in cooperation, and the protective film body achieves the excellent anti-static effect and practicability through the unique multi-layer design. And the surface layer is made of a high-transparency polycarbonate material, so that the definition during use is ensured. The middle layer is polyurethane, so that the wear resistance and the impact resistance of the film are enhanced, and meanwhile, the polar groups are beneficial to adjusting charge distribution and improving the anti-static performance. The base layer is made of polyvinyl alcohol, rich hydroxyl groups of the polyvinyl alcohol can absorb moisture in air, and a water film is formed to reduce surface resistance.

Description

Technical Field

[0001] The utility model relates to the technical field of protective films, in particular to a flexible antistatic protective film. Background Art

[0002] During the production and transportation of electronic products and high-precision equipment, electrostatic discharge (ESD) can cause serious damage. Anti-static protective film is commonly used in the manufacturing process of electronic devices, primarily to prevent dust and impurities from adsorbing and preventing electrostatic damage. With the rapid development of electronic devices such as mobile phones and tablets in recent years, the use of process protective films for these devices has also grown rapidly.

[0003] Existing antistatic films mostly use a single layer of material. While this design simplifies the manufacturing process, it exposes numerous problems in practical applications. First, the antistatic performance of single-layer materials is limited, and they cannot effectively resist the impact of high-energy static electricity, which is particularly fatal in environments with static-sensitive electronic components and precision instruments. Second, single-layer materials are poorly flexible and lack sufficient elasticity, making them difficult to adapt to complex surfaces, limiting their widespread application in various devices and structures. Furthermore, this material is prone to embrittlement and cracking after prolonged use, further reducing its service life and reliability.

[0004] Therefore, it is necessary to provide a flexible antistatic protective film to solve the above technical problems. Utility Model Content

[0005] The purpose of the utility model is to provide a flexible antistatic protective film to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A flexible antistatic protective film, comprising:

[0008] The protective film body includes a base layer, a first adhesive layer is bonded to the lower surface of the base layer, an intermediate layer is bonded to the lower surface of the first adhesive layer, a second adhesive layer is bonded to the lower surface of the intermediate layer, and a surface layer is bonded to the lower surface of the second adhesive layer.

[0009] Preferably, the base layer is made of polyvinyl alcohol.

[0010] Preferably, the middle layer is made of polyurethane material.

[0011] Preferably, the surface layer is made of polycarbonate material, and an acrylic adhesive coating is provided on the lower surface of the surface layer.

[0012] Preferably, the thickness of the base layer is 50-100 microns.

[0013] Preferably, the thickness of the intermediate layer is 20-50 microns.

[0014] Preferably, the thickness of the surface layer is 10-30 microns.

[0015] Preferably, the first adhesive layer and the second adhesive layer are both made of hot melt adhesive, and the base layer, the middle layer and the surface layer are bonded together by the first adhesive layer and the second adhesive layer to form an integrated structure.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] The utility model achieves excellent antistatic effect and practicality through the coordinated use of a protective film body, a base layer, a first adhesive layer, an intermediate layer, a second adhesive layer and a surface layer. The protective film body achieves excellent antistatic effect and practicality through a unique multi-layer design. The surface layer is made of highly transparent polycarbonate material to ensure clarity during use. The intermediate layer is polyurethane, which enhances the wear resistance and impact resistance of the film. At the same time, its polar groups help to regulate the charge distribution and improve the antistatic performance. The base layer is made of polyvinyl alcohol, whose rich hydroxyl groups can absorb moisture in the air to form a water film to reduce surface resistance, achieve the antistatic purpose, and protect the inner layer from external erosion. In addition, the protective film is easily adhered to electronic devices through acrylic adhesives and can be easily peeled off without leaving any residual glue. This design not only provides stable adhesion, but also ensures ease of use. The protective film body combines the characteristics of antistatic, wear resistance, impact resistance and high transparency, making it very suitable for a variety of application scenarios that require antistatic protection, providing comprehensive and long-lasting protection for electronic devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the present utility model.

[0019] Figure 2 It is a schematic diagram of the layered structure of the utility model.

[0020] Figure 3 It is a structural diagram of the base layer in this utility model.

[0021] Figure 4 This is a schematic structural diagram of the middle layer in the present invention.

[0022] Figure 5 It is a structural schematic diagram of the surface layer in this utility model.

[0023] In the figure: 1. Protective film body; 2. Base layer; 3. First adhesive layer; 4. Middle layer; 5. Second adhesive layer; 6. Surface layer. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0025] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] See also Figure 1-Figure 5 , an embodiment provided by the utility model:

[0029] A flexible antistatic protective film, comprising:

[0030] The protective film body 1 includes a base layer 2, a first adhesive layer 3 is bonded to the lower surface of the base layer 2, an intermediate layer 4 is bonded to the lower surface of the first adhesive layer 3, a second adhesive layer 5 is bonded to the lower surface of the intermediate layer 4, and a surface layer 6 is bonded to the lower surface of the second adhesive layer 5.

[0031] The base layer 2 is made of polyvinyl alcohol, which provides flexibility and basic anti-static properties.

[0032] In one embodiment, the middle layer 4 is made of polyurethane material to enhance mechanical strength and tensile strength and further adjust anti-static performance.

[0033] In one preferred embodiment, the surface layer 6 is made of polycarbonate material, and an acrylic adhesive coating is provided on the lower surface of the surface layer 6 to maintain high transparency, excellent weather resistance and surface smoothness.

[0034] In one embodiment, the thickness of the base layer 2 is 50-100 microns. The thick base layer provides a solid foundation support, ensuring that the entire structure has high strength and good impact resistance, and can provide a stable platform for more complex interlayer functions and designs.

[0035] In one of the preferred embodiments, the thickness of the intermediate layer 4 is 20-50 microns. The medium-thick intermediate layer 4 can provide the necessary mechanical support and isolation protection while maintaining the flexibility and elasticity of the structure, avoiding stress concentration or cracks caused by excessive hardness.

[0036] In one embodiment, the thickness of the surface layer 6 is 10-30 microns. The thinner surface layer 6 can ensure excellent transparency and optical performance, especially for electronic devices or optical components that require high-definition display, the thin surface layer can minimize light loss.

[0037] In one preferred embodiment, the first adhesive layer 3 and the second adhesive layer 5 are both made of hot melt adhesive, and the base layer 2, the middle layer 4, and the surface layer 6 are bonded together by the first adhesive layer 3 and the second adhesive layer 5 to form an integrated structure. The use of hot melt adhesive as the first adhesive layer 3 and the second adhesive layer 5 can quickly solidify, provide high bonding strength, and enhance the overall structural durability of the product. In addition, hot melt adhesive has good weather resistance and chemical resistance, is environmentally friendly and safe, and can be applied to a variety of substrates to meet design flexibility and diversified needs. At the same time, the low cost and easy large-scale production of hot melt adhesives help improve production efficiency and market competitiveness, thereby achieving better cost control while ensuring product consistency and performance.

[0038] The working principle of the present invention is as follows: when the protective film body 1 is used, it is directly adhered to the outer surface of the electronic device by coating a layer of acrylic adhesive on the lower surface of the surface layer 6. This adhesive not only provides good adhesion, but also can be easily peeled off when needed without leaving any residual glue. After the protective film body 1 is adhered to the electronic device, the base layer 2 is set. The base layer 2 is made of polyvinyl alcohol. The molecular structure of polyvinyl alcohol contains a large number of hydroxyl groups -OH. These hydroxyl groups can absorb moisture in the air to form a thin water film, thereby reducing surface resistance and achieving an anti-static effect. At the same time, polyvinyl alcohol can protect the middle layer 4 and the surface layer 6 to prevent the external environment from corroding the film. Through the setting of the middle layer 4, the material of the middle layer 4 is polyurethane material. Polyurethane has high mechanical strength, can enhance the wear resistance and impact resistance of the film, and extend the service life of the film. At the same time, the polar groups in the molecular structure of polyurethane can adjust the charge distribution of the film, and further enhance the antistatic performance. Through the setting of the surface layer 6, the material of the surface layer 6 is polycarbonate material, which has extremely high transparency and can maintain the clarity of the film when in use without affecting visual observation. Therefore, the protective film body 1 has good antistatic performance and flexibility, and is suitable for a variety of application scenarios that require antistatic protection.

[0039] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A flexible antistatic protective film, characterized in that: It includes: A protective film body (1) comprises a base layer (2), a first adhesive layer (3) being bonded to the lower surface of the base layer (2), an intermediate layer (4) being bonded to the lower surface of the first adhesive layer (3), a second adhesive layer (5) being bonded to the lower surface of the intermediate layer (4), a surface layer (6) being bonded to the lower surface of the second adhesive layer (5), the base layer (2) being made of polyvinyl alcohol, the intermediate layer (4) being made of polyurethane, the surface layer (6) being made of polycarbonate, and an acrylic adhesive coating being provided on the lower surface of the surface layer (6).

2. The flexible antistatic protective film according to claim 1, characterized in that: The thickness of the base layer (2) is 50-100 microns.

3. The flexible antistatic protective film according to claim 1, characterized in that: The thickness of the intermediate layer (4) is 20-50 microns.

4. The flexible antistatic protective film according to claim 1, characterized in that: The thickness of the surface layer (6) is 10-30 microns.

5. The flexible antistatic protective film according to claim 1, characterized in that: The first adhesive layer (3) and the second adhesive layer (5) are both made of hot melt adhesive, and the base layer (2), the middle layer (4) and the surface layer (6) are bonded together by the first adhesive layer (3) and the second adhesive layer (5) to form an integrated structure.

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