membrane

Abstract

The utility model discloses a diaphragm, comprising: first glue layer, film layer and second glue layer, first glue layer and second glue layer are arranged on both sides of film layer respectively, wherein, film layer is made of EPU material. Through the cooperation of first glue layer, film layer and second glue layer, the structure of diaphragm can be simplified, and production and manufacturing are facilitated. The film layer is made of EPU material, which can facilitate the penetration of ultrasonic waves and the like, reduce the obstruction to ultrasonic waves and the like, and improve the sensitivity of fingerprint identification.

Description

Technical Field

[0001] This utility model relates to the field of membrane technology, specifically to a membrane sheet. Background Technology

[0002] PVC films are used in many electronic products, such as mobile phones. The film is applied to the surface of the phone to protect it. Current mobile phones can be unlocked by fingerprint, such as optical fingerprint unlock and ultrasonic fingerprint unlock. When a regular film is applied to the phone screen, it will cover the fingerprint recognition area. The film itself hinders the transmission of ultrasonic waves, which will lead to the fingerprint recognition being insensitive. Utility Model Content

[0003] In view of the shortcomings of the existing technology, this utility model provides a diaphragm.

[0004] The present invention discloses a diaphragm comprising: a first adhesive layer, a film layer and a second adhesive layer, wherein the first adhesive layer and the second adhesive layer are respectively disposed on both sides of the film layer, and the film layer is made of EPU material.

[0005] According to one embodiment of the present invention, the first adhesive layer is made of pressure-sensitive adhesive material.

[0006] According to one embodiment of the present invention, the thickness of the first adhesive layer is 25-75 μm.

[0007] According to one embodiment of the present invention, the thickness of the first adhesive layer is 25μm, 50μm or 75μm.

[0008] According to one embodiment of the present invention, the thickness of the film layer is 125-150 μm.

[0009] According to one embodiment of the present invention, the thickness of the second adhesive layer is 25-50 μm.

[0010] According to one embodiment of the present invention, the thickness of the second adhesive layer is 25μm, 35μm or 50μm.

[0011] According to one embodiment of the present invention, the second adhesive layer is made of pressure-sensitive adhesive material.

[0012] According to one embodiment of the present invention, it further includes a first protective layer, which is disposed on the side of the first adhesive layer away from the film layer.

[0013] According to one embodiment of the present invention, a second protective layer is further included, which is disposed on the side of the second adhesive layer away from the film layer.

[0014] The beneficial effects of this invention are that the combination of the first adhesive layer, the film layer, and the second adhesive layer simplifies the structure of the film and facilitates manufacturing; the film layer is made of EPU material, which facilitates the penetration of ultrasonic waves, thereby reducing the obstruction of ultrasonic waves and improving the sensitivity of fingerprint recognition. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0016] Figure 1 This is a schematic cross-sectional view of the diaphragm.

[0017] Explanation of reference numerals in the attached figures

[0018] 1. First adhesive layer; 2. Film layer; 3. Second adhesive layer; 4. First protective layer; 5. Second protective layer. Detailed Implementation

[0019] The following drawings will disclose several embodiments of this utility model. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit this utility model. That is, in some embodiments of this utility model, these practical details are not essential. In addition, for the sake of simplicity, some conventional structures and components will be shown in the drawings in a simple schematic manner.

[0020] Furthermore, in this utility model, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the utility model. They are merely used to distinguish components or operations described with the same technical terms and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0021] Example 1

[0022] like Figure 1 As shown, Figure 1 This is a cross-sectional schematic diagram of the diaphragm. The diaphragm includes a first adhesive layer 1, a membrane layer 2, and a second adhesive layer 3. The first adhesive layer 1 is disposed on one side of the membrane layer 2, and the second adhesive layer 3 is disposed on the other side of the membrane layer 2.

[0023] The thickness of the first adhesive layer 1 is 25-75μm. In specific applications, the first adhesive layer 1 is made of pressure-sensitive adhesive material, such as the material with model number KN7025, KN7050 or KN7075 produced by Jiayun New Materials Co., Ltd.

[0024] The thickness of film layer 2 is 125-150μm. In specific applications, film layer 2 is made of EPU (elastic polyurethane) material, which is conducive to the ultrasonic wave penetration in the fingerprint unlocking area of ​​the mobile phone. In other words, it has less resistance to ultrasonic waves, which makes the response speed during unlocking faster and improves the unlocking sensitivity.

[0025] The thickness of the second adhesive layer 3 is 25-50μm. In specific applications, the second adhesive layer 3 is made of pressure-sensitive adhesive material, such as the KNOM material produced by Jiayun New Materials Co., Ltd.

[0026] In this embodiment, the thickness of the first adhesive layer 1 is 25 μm, the thickness of the film layer 2 is 125 μm, and the thickness of the second adhesive layer 3 is 25 μm.

[0027] Furthermore, the film also includes a first protective layer 4, which is disposed on the side of the first adhesive layer 1 away from the film layer 2. The first protective layer 4 can protect the first adhesive layer 1. Specifically, the first protective layer 4 is an existing release film product, and it needs to be torn off during use.

[0028] Furthermore, the film also has a second protective layer 5, which is located on the side of the second adhesive layer 3 away from the film layer 2. The second protective layer 5 can protect the second adhesive layer 3. Specifically, the second protective layer 5 is an existing release film product, and it needs to be torn off during use.

[0029] In practical applications, the positions of the first protective layer 4 and the second protective layer 5 can be interchanged without changing the function of the two layers.

[0030] In summary, the combination of the first adhesive layer 1, the film layer 2, and the second adhesive layer 3 simplifies the structure of the film and facilitates manufacturing. The film layer 2 is made of EPU material, which facilitates the penetration of ultrasonic waves, thereby reducing the obstruction of ultrasonic waves and improving the sensitivity of fingerprint recognition.

[0031] Example 2

[0032] The difference between this embodiment and Embodiment 1 is that the thickness of the first adhesive layer 1 is 30 μm, the thickness of the film layer 2 is 130 μm, and the thickness of the second adhesive layer 3 is 30 μm.

[0033] Example 3

[0034] The difference between this embodiment and Embodiment 1 is that the thickness of the first adhesive layer 1 is 50 μm, the thickness of the film layer 2 is 130 μm, and the thickness of the second adhesive layer 3 is 35 μm.

[0035] Example 4

[0036] The difference between this embodiment and Embodiment 1 is that the thickness of the first adhesive layer 1 is 60 μm, the thickness of the film layer 2 is 135 μm, and the thickness of the second adhesive layer 3 is 40 μm.

[0037] Example 5

[0038] The difference between this embodiment and Embodiment 1 is that the thickness of the first adhesive layer 1 is 75 μm, the thickness of the film layer 2 is 150 μm, and the thickness of the second adhesive layer 3 is 50 μm.

[0039] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A diaphragm, characterized in that, include: A first adhesive layer (1), a film layer (2), and a second adhesive layer (3) are respectively disposed on both sides of the film layer (2), wherein the film layer (2) is made of EPU material.

2. The diaphragm according to claim 1, characterized in that, The first adhesive layer (1) is made of pressure-sensitive adhesive material.

3. The diaphragm according to claim 1, characterized in that, The thickness of the first adhesive layer (1) is 25-75 μm.

4. The diaphragm according to claim 3, characterized in that, The thickness of the first adhesive layer (1) is 25 μm, 50 μm or 75 μm.

5. The diaphragm according to claim 1, characterized in that, The thickness of the film (2) is 125-150 μm.

6. The diaphragm according to any one of claims 1-5, characterized in that, The thickness of the second adhesive layer (3) is 25-50 μm.

7. The diaphragm according to claim 6, characterized in that, The thickness of the second adhesive layer (3) is 25 μm, 35 μm or 50 μm.

8. The diaphragm according to any one of claims 1-5, characterized in that, The second adhesive layer (3) is made of pressure-sensitive adhesive material.

9. The diaphragm according to any one of claims 1-5, characterized in that, It also includes a first protective layer (4), which is disposed on the side of the first adhesive layer (1) away from the film layer (2).

10. The diaphragm according to claim 9, characterized in that, It also includes a second protective layer (5), which is disposed on the side of the second adhesive layer (3) away from the film layer (2).

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