Shading cover film applied to FPC (flexible printed circuit) board

Abstract

The utility model relates to the field of FPC (flexible printed circuit) boards, in particular to a shading cover film applied to an FPC board, which comprises a cover film body, the cover film body at least comprises a first shading part and a second shading part, one side of the first shading part is connected with an external FPC board, the second shading part is connected with the first shading part, the first shading part is positioned on the upper side of the second shading part, and the second shading part is positioned on the lower side of the second shading part. The first shading part and the second shading part are used for shading and electrical insulation, and the first shading part and the second shading part replace a shading cover film surface screen printing shading ink in the prior art. The problems of high production cost and low production efficiency caused by a tedious process of screen printing of the shading ink are solved, the production efficiency of the shading cover film is effectively improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of FPC soft boards, in particular to a light-shielding covering film applied to FPC soft boards. Background Art

[0002] In the current FPC soft board industry, people achieve the purpose of shading by silk-screening shading ink on the surface of the shading covering film. However, the process of silk-screening shading ink is relatively complicated, resulting in low production efficiency and high production cost of the shading covering film. Therefore, it is necessary to develop a shading covering film for FPC soft boards to optimize the structure of the shading covering film and improve the production efficiency of the shading covering film, thereby reducing the production cost of the shading covering film. Utility Model Content

[0003] In view of the above-mentioned problem that the prior art of screen printing light-shielding ink on the surface of the light-shielding cover film has a complicated process, resulting in low production efficiency and high production cost of the light-shielding cover film, the technical solution adopted by the utility model to solve the technical problem is:

[0004] A light-shielding covering film applied to an FPC soft board comprises a covering film body, wherein the covering film body comprises at least a first light-shielding portion connected to an external FPC soft board on one side and a second light-shielding portion connected to the first light-shielding portion, wherein the first light-shielding portion is located on the upper side of the second light-shielding portion, and the first light-shielding portion and the second light-shielding portion are used for light shielding and electrical insulation.

[0005] A light-shielding covering film applied to an FPC soft board, wherein the first light-shielding portion comprises a first connecting film and a first light-shielding adhesive located at the lower side of the first connecting film and connected to the second light-shielding portion.

[0006] A light-shielding covering film applied to an FPC soft board, wherein the second light-shielding portion comprises a second connecting film connected to the first light-shielding portion, and a second light-shielding glue located at the lower side of the second connecting film and connected to the external FPC soft board.

[0007] A light-shielding covering film applied to an FPC soft board, wherein the first connecting film and the second connecting film are PET films.

[0008] A light-shielding cover film applied to an FPC soft board, wherein the first connection film and the second connection film are PI films.

[0009] A light-shielding covering film applied to an FPC soft board, wherein the first light-shielding glue and the second light-shielding glue are made of light-shielding glue.

[0010] A light-shielding covering film applied to an FPC soft board, wherein the thickness of the first connecting film and the second connecting film range from 2 μm to 300 μm respectively.

[0011] A light-shielding covering film applied to an FPC soft board, wherein the thickness of the first light-shielding adhesive and the second light-shielding adhesive range from 2 μm to 75 μm respectively.

[0012] A light-shielding cover film applied to an FPC soft board, wherein the first light-shielding portion and the second light-shielding portion are respectively rectangular or arc-shaped in cross-section.

[0013] A light-shielding cover film applied to an FPC soft board, wherein a resin layer or an insulating layer is arranged outside the first light-shielding portion.

[0014] The beneficial effects of the utility model are as follows:

[0015] The utility model is composed of a first shading part and a second shading part, and the first shading part and the second shading part have the effect of shading and insulation. Therefore, the first shading part and the second shading part replace the silk-screen shading ink on the surface of the shading covering film in the original technology, and solve the problem of high production cost and low production efficiency due to the complicated process of silk-screen shading ink by eliminating the process of silk-screen shading ink, thereby effectively improving the production efficiency of the shading covering film and reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a schematic structural diagram of a light-shielding covering film applied to an FPC soft board. DETAILED DESCRIPTION

[0017] The implementation modes of the present utility model are described in detail below in conjunction with the accompanying drawings.

[0018] See also Figure 1 A light-shielding covering film applied to an FPC soft board includes a covering film body 1, wherein the covering film body 1 includes at least a first light-shielding portion 11 connected to an external FPC soft board on one side, and a second light-shielding portion 12 connected to the first light-shielding portion 11, wherein the first light-shielding portion 11 is located on the upper side of the second light-shielding portion 12, and the first light-shielding portion 11 and the second light-shielding portion 12 are used for light-shielding and electrical insulation. The first light-shielding portion 11 and the second light-shielding portion 12 form a double-layer light-shielding design, replacing the original process of screen-printing light-shielding ink on the surface of the light-shielding covering film, solving the problem of high production cost and low production efficiency caused by screen-printing light-shielding ink, effectively improving the production efficiency of the light-shielding covering film and reducing the production cost, and the first light-shielding portion 11 and the second light-shielding portion 12 can improve better light-shielding effect and electrical insulation performance, ensuring the stability and reliability of the FPC soft board in a complex environment, and further, the first light-shielding portion 11 and the second light-shielding portion 12 are compounded by rolling and pressing.

[0019] For further information, see Figure 1, a light-shielding covering film applied to an FPC soft board, wherein the first light-shielding portion 11 includes a first connecting film 111 and a first light-shielding adhesive 112 located at the lower side of the first connecting film 111 and connected to the second light-shielding portion 12. The first connecting film 111 provides a stable support for the first light-shielding adhesive 112, and can ensure that the first light-shielding portion 11 is firmly fixed on the FPC soft board. Furthermore, the first connecting film 111 has good insulation performance and light-shielding effect, and can provide effective and reliable electrical isolation for the FPC soft board, prevent current leakage, and ensure the safety of the FPC soft board circuit. At the same time, it plays a light-shielding role, can effectively absorb and block light, and plays a double-layer light-shielding role with the first connecting film 111, achieving an efficient light-shielding effect, and effectively improving the light-shielding performance of the first light-shielding portion 11. In addition, the first light-shielding The glue 112 can provide strong adhesion to ensure that the first light-shielding portion 11 is stably fixed on the FPC soft board and will not fall off easily even under bending or deformation conditions, thereby ensuring the stability and reliability of the light-shielding covering film. The flexibility of the first light-shielding glue 112 enables the first light-shielding portion 11 to use the bending and deformation of the FPC soft board without affecting the flexibility and bendability of the FPC soft board. Such a design enables the first light-shielding portion 11 to obtain functions such as light-shielding, adhesion, electrical isolation and mechanical protection, thereby realizing the multifunctional integration of the light-shielding covering film and effectively improving the practicality of the light-shielding covering film.

[0020] For further information, see Figure 1 , a light-shielding covering film applied to an FPC soft board, wherein the second light-shielding portion 12 includes a second connecting film 121 connected to the first light-shielding portion 11, and a second light-shielding adhesive 122 located at the lower side of the second connecting film 121 and connected to the external FPC soft board. The second connecting film 121 is connected to the first light-shielding portion 11, and is closely matched with the second light-shielding adhesive 122 to form the second light-shielding portion 12, the second connecting film 121 has good electrical insulation and mechanical strength, and the second light-shielding adhesive 122 is located at the lower side of the second connecting film 121, and is connected to the external FPC soft board, which plays a light-shielding effect while ensuring that the light-shielding covering film and the external FPC soft board can be firmly attached, so the second connecting film 121 and the second light-shielding adhesive 122 work together to form a double light-shielding barrier, which effectively improves the light-shielding effect of the light-shielding covering film, and further, the second connecting film 121 is connected to the first light-shielding adhesive 112, and can also be connected to the bottom side of the structure composed of multiple first light-shielding portions 11 arranged continuously up and down.

[0021] For further information, see Figure 1, a light-shielding covering film applied to an FPC soft board, wherein the first connecting film 111 and the second connecting film 121 are PET films. PET films have excellent mechanical strength and toughness, and can withstand a certain degree of stretching and bending. Therefore, the first connecting film 111 uses PET films, which can perfectly adapt to the folding and bending applications of the FPC soft board. At the same time, the PET film has excellent electrical insulation performance, which can effectively isolate the current and prevent short circuits. The PET film can remain stable in a wide temperature range and is not easily affected by temperature changes. It is suitable for use in various working environments. Furthermore, the PET film itself has high transparency, but can be added with different colors of sunscreen agents to block unwanted light and achieve a sunscreen effect. The PET film has good resistance to most chemicals, is not easily corroded, and can extend the service life of the sunscreen covering film. Therefore, by using PET films as the first connecting film 111 and the second connecting film 121, the sunscreen covering film can meet the basic needs of the FPC soft board in terms of sunscreen, insulation and mechanical protection, and is also environmentally friendly and economical, effectively improving the practicality of the sunscreen covering film.

[0022] For further information, see Figure 1 , a light-shielding covering film applied to an FPC soft board, wherein the first connecting film 111 and the second connecting film 112 are PI films. The PI film has extremely high thermal stability, and can remain stable at temperatures as high as 200°C or above. Furthermore, the PI film has excellent electrical insulation, and can provide excellent electrical isolation to protect the circuit from the threat of current leakage. Secondly, the PI film has good mechanical strength and chemical stability. The PI film has good resistance to most solvents, acids, alkalis and other chemical substances, is not easily corroded, and can effectively extend the service life of the light-shielding covering film. Furthermore, the low dielectric constant and low loss factor of the PI film can ensure the high efficiency and stability of signal transmission. Therefore, by using the PI film as the first connecting film 111 and the second connecting film 121, the basic requirements of the FPC soft board in terms of light shielding, insulation and mechanical protection can be met, and the practicality and stability of the light-shielding covering film can be effectively improved.

[0023] For further information, see Figure 1, a light-shielding covering film applied to an FPC soft board, wherein the first light-shielding glue 112 and the second light-shielding glue 122 are made of light-shielding glue. Such a design enables the first light-shielding glue 112 and the second light-shielding glue 122 to obtain high light-shielding characteristics, and can achieve a high-efficiency light-shielding effect. Secondly, the light-shielding glue has good adhesion, which enables the first light-shielding portion 11, the second light-shielding portion 12 and the FPC soft board to fit tightly to form a stable structure. At the same time, the light-shielding glue has good resistance to various chemical substances and is not easily corroded, which can ensure the stability and reliability of the light-shielding covering film. Furthermore, the light-shielding glue has a certain degree of flexibility, which can be used for the bending and deformation of the FPC soft board, and will not affect the flexibility of the FPC soft board due to the excessive hardness of the material. Therefore, the light-shielding glue is used as the first light-shielding glue 112. The material of the second light-shielding glue 122 can ensure that the first light-shielding portion 11 and the second light-shielding portion 12 can be firmly connected, while having light-shielding performance, effectively blocking light, ensuring the light-shielding effect of the light-shielding covering film, and preventing short circuits between circuits, thereby effectively improving the reliability and safety of the light-shielding covering film. Furthermore, the light-shielding glue is specifically AD glue, which not only has the light-shielding performance of traditional light-shielding glue, but also has conductivity in the vertical direction and insulation in the horizontal direction, thereby providing effective electrical isolation for the FPC soft board. At the same time, AD glue has excellent adhesion properties, and can maintain good adhesion and structural stability even under conditions of long-term use and repeated bending.

[0024] For further information, see Figure 1 , a light-shielding covering film applied to FPC soft board, the thickness range of the first connecting film 111 and the second connecting film 121 is 2μm to 300μm respectively. With such a design, the first connecting film 111 and the second connecting film 121 can adapt to different usage scenarios. When the light-shielding covering film is used in precision electronic equipment, it is necessary to use thinner first connecting film 111 and second connecting film 121 (such as 2μm to 50μm), which can keep the equipment light and flexible. When the light-shielding covering film is used in industrial equipment, it is necessary to use thicker first connecting film 111 and second connecting film 121. Therefore, the thickness range of the first connecting film 111 and the second connecting film 121 can adapt to different usage requirements, effectively improving the practicality of the light-shielding covering film.

[0025] For further information, see Figure 1, a light-shielding covering film applied to an FPC soft board, the thickness range of the first light-shielding glue 112 and the second light-shielding glue 122 is 2μm to 75μm respectively. With such a design, the first light-shielding glue 112 and the second light-shielding glue 122 can adapt to different usage scenarios, and the thickness of the light-shielding glue can directly affect the light-shielding effect. When the light-shielding covering film is used in precision electronic equipment, a thin and flexible light-shielding glue layer (such as 2μm to 25μm) is often required. When the light-shielding covering film is used in industrial equipment, a thicker light-shielding glue layer (such as 50μm to 75μm) is required. While maintaining the light-shielding effect, the appropriate thickness can also ensure that the first light-shielding glue 112 and the second light-shielding glue 122 have sufficient flexibility to use the bending and folding requirements of the FPC soft board. Therefore, the thickness range of the first light-shielding glue 112 and the second light-shielding glue 122 can adapt to different usage requirements, effectively improving the practicality of the light-shielding covering film.

[0026] For further information, see Figure 1 , a light-shielding covering film applied to an FPC soft board, wherein the cross-sections of the first light-shielding portion 11 and the second light-shielding portion 12 are respectively rectangular or arc-shaped. When the cross-sections of the first light-shielding portion 11 and the second light-shielding portion 12 are respectively rectangular, they can fit more closely to the plane area of ​​the FPC soft board, maximizing the use of space. At the same time, the rectangular shape is relatively simple during the cutting and assembly process, and is easy to achieve standardized production, which can effectively improve the production efficiency of the light-shielding covering film and reduce costs. When the cross-sections of the first light-shielding portion 11 and the second light-shielding portion 12 are respectively arc-shaped, they can better adapt to the curved or irregular surface of the FPC soft board, ensuring that the light-shielding covering film fits tightly on complex geometric shapes, which can effectively improve the consistency of the light-shielding effect. At the same time, the arc-shaped design helps to disperse stress and reduce local stress concentration during bending and folding, thereby improving the fatigue resistance and service life of the light-shielding covering film.

[0027] For further information, see Figure 1 , a light-shielding covering film applied to an FPC soft board, wherein a resin layer or an insulating layer is provided on the outer side of the first light-shielding portion 11. With such a design, the light-shielding effect of the light-shielding covering film can be further enhanced, and the resin material has good mechanical properties and wear resistance, and can provide additional protection for the first light-shielding portion 11, reducing the risk of wear and damage, and the resin has excellent adhesion properties, and can effectively enhance the bonding between the first light-shielding portion and the second light-shielding portion, and effectively improve the stability of the overall structure.

[0028] Example 1

[0029] See also Figure 1A light-shielding covering film applied to an FPC soft board includes a covering film body 1, wherein the covering film body 1 includes at least a first light-shielding portion 11 connected to an external FPC soft board on one side, and a second light-shielding portion 12 connected to the first light-shielding portion 11, wherein the first light-shielding portion 11 is located on the upper side of the second light-shielding portion 12, and the first light-shielding portion 11 and the second light-shielding portion 12 are used for light shielding and electrical insulation.

[0030] For further information, see Figure 1 , a shading covering film applied to an FPC soft board, wherein the first shading portion 11 includes a first connecting film 111 and a first shading glue 112 located at the lower side of the first connecting film 111 and connected to the second shading portion 12.

[0031] For further information, see Figure 1 , a light-shielding covering film applied to an FPC soft board, wherein the first connecting film 111 and the second connecting film 121 are PET films.

[0032] For further information, see Figure 1 , a light-shielding covering film applied to an FPC soft board, wherein the material of the first light-shielding glue 112 and the second light-shielding glue 122 is light-shielding glue.

[0033] For further information, see Figure 1 , a light-shielding covering film applied to an FPC soft board, the thickness of the first connecting film 111 and the second connecting film 121 are 300 μm respectively.

[0034] For further information, see Figure 1 , a light-shielding covering film applied to an FPC soft board, the thickness of the first light-shielding glue 112 and the second light-shielding glue 122 are respectively 2 μm.

[0035] For further information, see Figure 1 , a light-shielding covering film applied to an FPC soft board, wherein the cross-sections of the first light-shielding portion 11 and the second light-shielding portion 12 are respectively rectangular.

[0036] For further information, see Figure 1 , a light-shielding covering film applied to an FPC soft board, wherein a resin layer is provided on the outer side of the first light-shielding portion 11.

[0037] Example 2

[0038] Different from Example 1, the first connecting film 111 and the second connecting film 121 are PI films, the thickness of the first connecting film 111 and the second connecting film 121 are respectively 2 μm, the thickness of the first light-shielding glue 112 and the second light-shielding glue 122 are respectively 75 μm, the cross-sections of the first light-shielding portion 11 and the second light-shielding portion 12 are respectively arc-shaped, and an insulating layer is provided on the outside of the first light-shielding portion 11.

[0039] Example 3

[0040] Different from Example 2, the first connecting film 111 and the second connecting film 121 are PET films, the thickness of the first connecting film 111 is 60 μm, the thickness of the second connecting film 121 is 50 μm, the thickness of the first light-shielding glue 112 is 20 μm, the thickness of the second light-shielding glue 121 is 30 μm, and the cross-sections of the first light-shielding portion 11 and the second light-shielding portion 12 are respectively rectangular.

[0041] The above examples are only used to further illustrate the technical content of the utility model, so that readers can understand it more easily, but it does not mean that the implementation methods of the utility model are limited to this. Any technical extension or re-creation made based on the utility model is protected by the utility model. The protection scope of the utility model shall be based on the claims.

Claims

1. A light-shielding covering film applied to an FPC soft board, comprising a covering film body (1), characterized in that: The covering film body (1) comprises at least a first light shielding portion (11) connected to an external FPC soft board on one side, and a second light shielding portion (12) connected to the first light shielding portion (11), the first light shielding portion (11) being located on the upper side of the second light shielding portion (12), and the first light shielding portion (11) and the second light shielding portion (12) being used for light shielding and electrical insulation.

2. The light-shielding covering film applied to FPC according to claim 1, characterized in that: The first light shielding portion (11) comprises a first connecting film (111) and a first light shielding adhesive (112) located at the lower side of the first connecting film (111) and connected to the second light shielding portion (12).

3. The light-shielding covering film applied to FPC according to claim 2, characterized in that: The second light shielding portion (12) comprises a second connection film (121) connected to the first light shielding portion (11), and a second light shielding adhesive (122) located at the lower side of the second connection film (121) and connected to the external FPC soft board.

4. The light-shielding covering film applied to FPC according to claim 3 is characterized in that: The first connecting film (111) and the second connecting film (121) are PET films.

5. The light-shielding covering film applied to FPC according to claim 3 is characterized in that: The first connecting film (111) and the second connecting film (121) are PI films.

6. The light-shielding covering film applied to FPC according to claim 3, characterized in that: The material of the first light-shielding glue (112) and the second light-shielding glue (122) is light-shielding glue.

7. The light-shielding covering film applied to FPC according to claim 3 is characterized in that: The thickness of the first connection film (111) and the second connection film (121) ranges from 2 μm to 300 μm respectively.

8. The light-shielding covering film applied to FPC according to claim 3 is characterized in that: The thickness of the first light-shielding glue (112) and the second light-shielding glue (122) range from 2 μm to 75 μm respectively.

9. The light-shielding cover film for FPC according to claim 1, characterized in that: The first light shielding portion (11) and the second light shielding portion (12) have cross sections that are respectively rectangular or arc-shaped.

10. The light-shielding covering film applied to FPC according to claim 1, characterized in that: A resin layer or an insulating layer is provided on the outer side of the first light shielding portion (11).

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