A double-sided antistatic protective film

Abstract

The utility model discloses a double -sided antistatic protective film belongs to the technical field of protective film, wherein, the double -sided antistatic protective film includes base film layer, one side of base film layer is provided with first antistatic layer, and the other side of base film layer is provided with second antistatic layer, and a plurality of convex particles are arranged in second antistatic layer. Compared with prior art, the utility model discloses through setting first antistatic layer and second antistatic layer on the two sides of base film layer, and introducing convex particle in second antistatic layer, and when protective film is attached on the surface such as touch screen, forms air layer, can further effectively prevent static electricity accumulation, thereby significantly improve the antistatic performance of protective film, can satisfy the use demand of various touch screens.

Description

Technical Field

[0001] This utility model belongs to the field of protective film technology, specifically relating to a double-sided antistatic protective film. Background Technology

[0002] In recent years, the rapid development of new energy vehicles and electronic products has driven the rapid development of the electronic components and liquid crystal display industries, which in turn has spurred the development of protective films related to these industries. During the manufacturing and shipping processes of touchscreens, a protective film is applied to ensure the touchscreen surface is not contaminated. After the protective film is applied to the touchscreen surface, peeling it off can cause damage to the touchscreen's backlight module due to the high resistance of the adhesive layer. To prevent defects during film removal, a common solution is to use antistatic protective films, giving the adhesive layer antistatic properties to avoid damage caused by charge breakdown during removal. However, existing antistatic protective films have insufficient antistatic performance and cannot meet the requirements of various touchscreen applications. Utility Model Content

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. Therefore, the purpose of this invention is to propose a double-sided antistatic protective film. Compared with existing technologies, this invention provides a first antistatic layer and a second antistatic layer on both sides of the base film layer, and introduces raised particles into the second antistatic layer. When the protective film is adhered to a surface such as a touchscreen, an air layer is formed, which can further effectively prevent static electricity accumulation, thereby significantly improving the antistatic performance of the protective film and meeting the usage requirements of various touchscreens.

[0004] This utility model proposes a double-sided antistatic protective film. According to an embodiment of this utility model, the double-sided antistatic protective film includes: Base film layer; A first antistatic layer is provided on one side of the base film layer, and a second antistatic layer is provided on the other side of the base film layer; The second antistatic layer contains several protruding particles.

[0005] Compared with the prior art, the double-sided antistatic protective film of the present invention, by setting a first antistatic layer and a second antistatic layer on both sides of the base film layer and introducing raised particles in the second antistatic layer, forms an air layer when the protective film is attached to a surface such as a touch screen, which can further effectively prevent static electricity accumulation, thereby significantly improving the antistatic performance of the protective film and meeting the usage requirements of various touch screens.

[0006] In addition, the double-sided antistatic protective film according to the above embodiments of the present invention may also have the following additional technical features: In some embodiments of this invention, the thickness of the base film layer is 38µm-50µm.

[0007] In some embodiments of this utility model, the thickness of the first antistatic layer is 1µm-2µm.

[0008] In some embodiments of this invention, the thickness of the second antistatic layer is 10µm-15µm.

[0009] In some embodiments of this invention, the particle size of the protruding particles is 1µm-3µm; And / or, the distribution density of the protruding particles in the second antistatic layer is 1000~3000 particles / cm². 2 ; And / or, the mass percentage of the protruding particles within the second antistatic layer is 1%-3%.

[0010] In some embodiments of this utility model, the double-sided antistatic protective film further includes a release film layer, which is located on the side of the second antistatic layer away from the base film layer.

[0011] In some embodiments of this utility model, the thickness of the release film layer is 25µm-30µm; And / or, the thickness of the double-sided antistatic protective film is 74µm-97µm.

[0012] In some embodiments of this utility model, the base film layer includes a transparent PET base film; And / or, the first antistatic layer includes an aqueous antistatic coating; And / or, the second antistatic layer includes an antistatic adhesive layer; And / or, the release film layer includes a PET release film.

[0013] In some embodiments of this invention, the transparent PET base film includes a non-silicone release film; The water-based antistatic coating includes at least one of a quaternary ammonium salt antistatic layer, a polythiophene antistatic layer, and a carbon nanotube antistatic layer. The antistatic adhesive layer includes at least one of an antistatic polyurethane adhesive layer and an antistatic acrylate adhesive layer.

[0014] In some embodiments of this invention, the protruding particles include at least one of conductive nickel powder and silver-plated conductive microspheres.

[0015] 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

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the overall structure of the double-sided antistatic protective film according to an embodiment of the present invention.

[0017] Figure label: Figure 1 In the middle: 1-base film layer, 2-first antistatic layer, 3-second antistatic layer, 4-protruding particles, 5-release film layer. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0019] In the description of this utility model, it should be understood that if terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "horizontal", "top", "bottom", "inner", "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they 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.

[0020] The following description, with reference to the accompanying drawings, describes a double-sided antistatic protective film 1 according to an embodiment of the present invention.

[0021] Reference Figure 1 The double-sided antistatic protective film according to an embodiment of the present invention includes: Base film layer 1; A first antistatic layer 2 is provided on one side of the base film layer 1, and a second antistatic layer 3 is provided on the other side of the base film layer 1; The second antistatic layer 3 has several protruding particles 4.

[0022] Compared with the prior art, this utility model sets a first antistatic layer 2 and a second antistatic layer 3 on both sides of the base film layer 1, and introduces raised particles 4 into the second antistatic layer 3. When the protective film is attached to a surface such as a touch screen, an air layer is formed, which can further effectively prevent static electricity accumulation, thereby significantly improving the antistatic performance of the protective film and meeting the usage requirements of various touch screens.

[0023] According to some embodiments of the present invention, the thickness of the base film layer 1 is 38µm-50µm, for example, it can be 38µm, 40µm, 45µm, 50µm or any range between the above values.

[0024] According to some embodiments of this invention, the thickness of the first antistatic layer 2 is 1µm-2µm, for example, 1.2µm, 1.5µm, etc. This invention controls the thickness of the first antistatic layer 2 to be 1µm-2µm, making the antistatic agent less prone to detachment and providing permanent antistatic properties.

[0025] According to some embodiments of this utility model, the thickness of the second antistatic layer 3 is 10µm-15µm, for example, it can be 10µm, 12µm, etc. Controlling the thickness of the second antistatic layer 3 to 10µm-15µm in this utility model is beneficial for protecting the object being adhered to; when the object is subjected to impact, the 10µm-15µm second antistatic layer can act as a buffer.

[0026] According to some embodiments of this invention, the particle size of the protruding particles 4 is 1µm-3µm, for example, 1.5µm, 2.0µm, 2.5µm, etc. Controlling the particle size of the protruding particles 4 to 1µm-3µm in this invention facilitates the dispersion of the protruding particles in the second antistatic layer.

[0027] According to some embodiments of this utility model, the mass percentage of the protruding particles 4 in the second antistatic layer 3 is 1%-3% (e.g., 1.5%, 2.5%, etc.); and / or, the distribution density of the protruding particles 4 in the second antistatic layer 3 is 1000~3000 particles / cm³. 2 (For example, it can be 1500 pieces / cm) 2 1800 pieces / cm 2 2000 pieces / cm 2 2500 pieces / cm 2 3000 pieces / cm 2 (or any range between the above values, etc.). The protruding particles 4 are uniformly dispersed in the second antistatic layer 3, and the content is appropriate to ensure that the antistatic effect is fully achieved.

[0028] According to some embodiments of this utility model, such as Figure 1 As shown, the double-sided antistatic protective film also includes a release film layer 5, which is located on the side of the second antistatic layer 3 away from the base film layer 1. This achieves isolation and protection of the double-sided antistatic protective film, as well as stable peeling.

[0029] According to some embodiments of the present invention, the thickness of the release film layer 5 is 25µm-30µm, for example, it can be 26µm, 28µm, 29µm, etc.

[0030] According to some embodiments of this utility model, the thickness of the double-sided antistatic protective film is 74µm-97µm, for example, it can be 75µm, 80µm, 85µm, 90µm or any range between the above values. In this utility model, the thickness of the double-sided antistatic protective film is suitable, providing protection when adhered to the touchscreen surface. If the thickness is too thin, it will not provide support during transportation, resulting in insignificant protection; if the thickness is too thick, adhesion will be difficult and costly.

[0031] In some embodiments of this utility model, the base film layer 1 includes a transparent PET base film, specifically commercially available transparent PET base films such as Hefei Lucky Film, FG7-38µm or FG4-50µm, etc. are selected. Non-silicone release film is selected to effectively prevent the silicon transfer phenomenon of silicone release film on adhesive layer.

[0032] In some embodiments of this invention, the first antistatic layer 2 includes a water-based antistatic coating, such as a quaternary ammonium salt antistatic layer, a polythiophene antistatic layer, or a carbon nanotube antistatic layer. To solve the antistatic problem, a water-based antistatic coating is applied to the surface of the base film layer. A preferred option is a quaternary ammonium salt antistatic layer, such as SH-105 from Shanghai Xuejie Chemical Co., Ltd.; a secondary option is a polythiophene antistatic layer, such as E607 from Huaina New Materials; or a secondary option is a carbon nanotube antistatic layer, such as XFM13 from Xianfeng Nano. Water-based antistatic coatings exhibit excellent antistatic performance, with a resistance lower than 1*10⁻⁶. 10 Ω / □, resistance is not affected by temperature and humidity, does not decrease over time, and has permanent antistatic properties.

[0033] In some embodiments of this invention, the second antistatic layer 3 includes an antistatic adhesive layer, such as an antistatic polyurethane adhesive layer and an antistatic acrylate adhesive layer. The antistatic adhesive layer is in direct contact with the object being adhered to, and during transportation, it acts as a buffer and protects the surface of the object from contamination. The preferred embodiment of the antistatic adhesive layer is an antistatic polyurethane adhesive layer; a secondary embodiment is an antistatic acrylate adhesive layer.

[0034] In some embodiments of this utility model, the release film layer 5 includes a PET release film, such as a non-silicone release film, with a thickness of 25µm-30µm. Using a non-silicone release film can effectively prevent silicone from transferring to the surface of the adhesive layer, thus preventing silicone contamination on the surface of the adhesive layer after it is bonded to the object, which meets PFAS requirements.

[0035] In some embodiments of this invention, the raised particles 4 include at least one of conductive nickel powder and silver-plated conductive microspheres. This invention uses raised particles 4 such as conductive nickel powder and silver-plated conductive microspheres. The protective film is adhered to the surface of the touchscreen, forming an air layer, which effectively prevents static electricity accumulation. Furthermore, the raised particles themselves possess antistatic properties and form conductive channels in the second antistatic layer, facilitating the release of generated static electricity. The preferred embodiment of the raised particles 4 is conductive nickel powder, such as that produced by Shenzhen Xiate Technology Co., Ltd.; a secondary embodiment is silver-plated conductive microspheres, such as those produced by Beijing Zhongke Keyou Technology Co., Ltd. The raised particles 4 themselves possess antistatic properties and form conductive channels in the adhesive layer, enabling the release of generated static electricity. The raised particles 4 form protrusions on the surface of the antistatic adhesive layer, and the protective film adheres to the surface of the object being adhered to, forming an air layer, which effectively prevents static electricity accumulation and further improves the antistatic performance of the protective film.

[0036] Example 1 The following reference Figure 1 The specific structure and preparation method of the double-sided antistatic protective film 1 according to an embodiment of the present invention are described.

[0037] According to an embodiment of the present invention, a double-sided antistatic protective film includes: a base film layer 1; a first antistatic layer 2 is disposed on one side of the base film layer 1, and a second antistatic layer 3 is disposed on the other side of the base film layer 1; a plurality of protruding particles 4 are disposed in the second antistatic layer 3; and a release film layer 5 is disposed on the side of the second antistatic layer 3 away from the base film layer 1. The base film layer 1 is a transparent PET base film with a thickness of 38µm, specifically selected from Hefei Lucky Film, FG7-38µm; The first antistatic layer 2 is a water-based antistatic coating with a thickness of 1.5µm, specifically a polythiophene antistatic layer; The second antistatic layer 3 is an antistatic adhesive layer with a thickness of 12µm, specifically an antistatic polyurethane adhesive layer; The protruding particles 4 are conductive nickel powder with a particle size of 2.0µm, accounting for 2% of the mass of the second antistatic layer 3, and have a distribution density of 2000 particles / cm³ within the second antistatic layer 3. 2 ; The release film layer 5 is a PET non-silicone release film with a thickness of 28µm, specifically Yangzhou Wanrun CP-28µm.

[0038] The method for preparing the above-mentioned double-sided antistatic protective film includes the following steps: (1) A water-based antistatic coating is applied to one side of the base film layer 1 to form the first antistatic layer 2.

[0039] (2) Disperse the protruding particles 4 evenly into the antistatic adhesive, and coat the other side of the base film layer 1 with the antistatic adhesive containing the protruding particles 4 to form the second antistatic layer 3.

[0040] (3) A non-silicone release film is composited on the surface of the second antistatic layer 3 to obtain a double-sided antistatic protective film.

[0041] Example 2 This embodiment provides a double-sided antistatic protective film, which differs from Embodiment 1 in that: (1) The first antistatic layer is a quaternary ammonium salt antistatic layer; and the corresponding process for preparing the first antistatic layer is adjusted to: the coating thickness is 1.8µm.

[0042] (2) The second antistatic layer is an antistatic acrylate adhesive layer; and the corresponding process for preparing the second antistatic layer is adjusted to: the coating thickness is 13µm.

[0043] (3) The raised particles 4 are silver-plated conductive microspheres, purchased from Zhongke Keyou.

[0044] Example 3 This embodiment provides a double-sided antistatic protective film, which differs from Embodiment 1 in that: (1) The thickness of the base film layer 1 is 45µm; (2) The thickness of the first antistatic layer 2 is 1µm; (3) The thickness of the second antistatic layer 3 is 10µm; (4) The thickness of the release film layer 5 is 25µm.

[0045] Example 4 This embodiment provides a double-sided antistatic protective film, which differs from Embodiment 1 in that: (1) The thickness of the base film layer 1 is 50µm; (2) The thickness of the first antistatic layer 2 is 2µm; (3) The thickness of the second antistatic layer 3 is 15µm; (4) The thickness of the release film layer 5 is 30µm.

[0046] Example 5 This embodiment provides a double-sided antistatic protective film, which differs from Embodiment 1 in that: (1) The distribution density of protruding particles in the second antistatic layer is 1000 particles / cm². 2 .

[0047] Example 6 This embodiment provides a double-sided antistatic protective film, which differs from Embodiment 1 in that: (1) The distribution density of protruding particles in the second antistatic layer is 3000 particles / cm². 2 .

[0048] Comparative Example 1 This comparative example provides a double-sided antistatic protective film, which differs from Example 1 in that: (1) No protruding particles are set in the second antistatic layer.

[0049] Test case This example demonstrates the antistatic performance test of the double-sided antistatic protective film obtained in the above embodiments and comparative examples.

[0050] The testing method is as follows: Test conditions: 25±2℃ / 50±5RH.

[0051] Test instrument: American TREK520 handheld electrostatic voltmeter.

[0052] Test procedure: Apply the protective film to the surface of the glass plate (Asahi Glass 1.1 glass sheet), peel it off quickly at 180 degrees, scan the surface of the glass plate with the probe of the test instrument, and record the maximum peeling voltage value.

[0053] The test results are shown in Table 1.

[0054] Table 1

[0055] As shown in Table 1, compared with Comparative Example 1, this utility model introduces raised particles, which form an air layer when the protective film is attached to the surface such as a touch screen, effectively preventing the accumulation of static electricity, thereby significantly improving the antistatic performance of the protective film and meeting the usage requirements of various touch screens.

[0056] In this specification, the use of terms such as "embodiment" indicates that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0057] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A double-sided antistatic protective film, characterized in that, include: Base film layer; A first antistatic layer is provided on one side of the base film layer, and a second antistatic layer is provided on the other side of the base film layer; The second antistatic layer contains several protruding particles.

2. The double-sided antistatic protective film according to claim 1, characterized in that, The thickness of the base film layer is 38µm-50µm.

3. The double-sided antistatic protective film according to claim 1, characterized in that, The thickness of the first antistatic layer is 1µm-2µm.

4. The double-sided antistatic protective film according to claim 1, characterized in that, The thickness of the second antistatic layer is 10µm-15µm.

5. The double-sided antistatic protective film according to claim 1, characterized in that, The diameter of the protruding particles is 1µm-3µm; And / or, the distribution density of the protruding particles in the second antistatic layer is 1000~3000 particles / cm². 2 ; And / or, the mass percentage of the protruding particles within the second antistatic layer is 1%-3%.

6. The double-sided antistatic protective film according to any one of claims 1 to 5, characterized in that, The double-sided antistatic protective film also includes a release film layer, which is located on the side of the second antistatic layer away from the base film layer.

7. The double-sided antistatic protective film according to claim 6, characterized in that, The thickness of the release film layer is 25µm-30µm; And / or, the thickness of the double-sided antistatic protective film is 74µm-97µm.

8. The double-sided antistatic protective film according to claim 6, characterized in that, The base film layer includes a transparent PET base film; And / or, the first antistatic layer includes an aqueous antistatic coating; And / or, the second antistatic layer includes an antistatic adhesive layer; And / or, the release film layer includes a PET release film.

9. The double-sided antistatic protective film according to claim 8, characterized in that, The transparent PET base film includes a non-silicone release film; The water-based antistatic coating includes at least one of a quaternary ammonium salt antistatic layer, a polythiophene antistatic layer, and a carbon nanotube antistatic layer. The antistatic adhesive layer includes at least one of an antistatic polyurethane adhesive layer and an antistatic acrylate adhesive layer.

10. The double-sided antistatic protective film according to claim 6, characterized in that, The protruding particles include at least one of conductive nickel powder and silver-plated conductive microspheres.

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