Special-shaped AB adhesive film

Abstract

The utility model discloses a special-shaped AB adhesive film which comprises two release films and two PET (polyethylene terephthalate) films, a fingerprint area is arranged on the upper side of the upper release film, an OCA (optical clear adhesive) I layer is arranged between the upper release film and the upper PET film, the upper release film and the upper PET film are adhered through the OCA I layer, and the lower release film and the upper PET film are adhered through the PET film. An OCA optical cement II layer is arranged between the upper PET film and the lower PET film, the upper PET film and the lower PET film are bonded through the OCA optical cement II layer, the thickness of the OCA optical cement II layer located under the fingerprint area is smaller than that of the periphery of the OCA optical cement II layer, a PSA silica gel layer is arranged between the lower PET film and the lower release film, and the lower PET film and the lower release film are bonded through the PSA silica gel layer. Through the structure, the problems that when the protective film is used, fingerprint unlocking is inconvenient if the protective film is too thick, and a mobile phone screen is inconvenient to protect if the protective film is too thin are solved.

Description

Technical Field

[0001] This utility model relates to the field of mobile phone film technology, and in particular to an irregularly shaped AB adhesive film. Background Technology

[0002] As a very common and extremely important electronic device, almost everyone has a mobile phone. During use, the screen of a mobile phone is often scratched or worn due to the constant swiping of fingernails or other hard objects on the screen, which affects the normal use of the product. People often put a protective film on the screen of electronic products to protect the display.

[0003] While existing protective films offer certain anti-glare, anti-blue light, and anti-fingerprint properties, their uniform thickness during use makes them problematic. If too thick, they hinder fingerprint unlocking; if too thin, they fail to protect the phone screen. Therefore, a non-standard AB adhesive film is proposed. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an irregularly shaped AB adhesive film, which solves the problem that if the protective film is too thick, it is inconvenient for fingerprint unlocking, and if it is too thin, it is inconvenient for protecting the mobile phone screen.

[0005] This utility model also provides a special-shaped AB adhesive film, including a release film and a PET film. Both the release film and the PET film have two layers. The upper release film has a fingerprint area on its upper side. An OCA optical adhesive layer I is provided between the upper release film and the upper PET film. The upper release film and the upper PET film are bonded by the OCA optical adhesive layer I. An OCA optical adhesive layer II is provided between the upper PET film and the lower PET film. The upper PET film and the lower PET film are bonded by the OCA optical adhesive layer II. The thickness of the OCA optical adhesive layer II located directly below the fingerprint area is less than the thickness of its outer periphery. A PSA silicone layer is provided between the lower PET film and the lower release film. The lower PET film and the lower release film are bonded by the PSA silicone layer.

[0006] According to the aforementioned irregular AB adhesive film, the upper and lower layers of the release film have the same thickness.

[0007] According to the aforementioned irregular AB adhesive film, the upper and lower PET films have the same thickness.

[0008] According to the aforementioned irregular AB adhesive film, the fingerprint area is circular and its range is larger than that of the screen fingerprint sensor.

[0009] According to the aforementioned irregular AB adhesive film, the OCA optical adhesive layer I and OCA optical adhesive layer II are pressure-sensitive resins cured by heat or light.

[0010] According to the aforementioned irregular AB adhesive film, the overall thickness of the AB adhesive film is 400 μm, and the thickness of the film located in the fingerprint area is 180 μm.

[0011] According to the aforementioned irregular AB adhesive film, the thickness of the OCA optical adhesive layer I and the OCA optical adhesive layer II is 25um-250um, and the thickness of the PSA silicone layer is 10um-50um.

[0012] According to the aforementioned irregular AB adhesive film, the peel strength of the OCA optical adhesive layer I and the OCA optical adhesive layer II is 100gf / 25mm-2500gf / 25mm, and the peel strength of the PSA silicone layer is 1gf / 25mm-500gf / 25mm.

[0013] This utility model has the following beneficial effects:

[0014] In this invention, the thickness of OCA optical adhesive layer I in the fingerprint area is less than that of OCA optical adhesive layer II, while the thickness is the same in other areas. Then, the upper release film is peeled off, tempered glass is attached, and the finished product is made and adhered to the mobile phone screen. Then, by gently pressing the fingerprint area with your hand, after multiple experiments, it is found that only 1-2 attempts are needed to unlock the screen each time. While ensuring that the film protects the mobile phone, the screen can be unlocked quickly and the operation is convenient.

[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 present invention will be further described below with reference to the accompanying drawings and embodiments;

[0017] Figure 1 This is a structural diagram of a non-standard AB adhesive film according to the present invention;

[0018] Figure 2 for Figure 1 Enlarged view of the structure at point A in the middle.

[0019] Legend:

[0020] 1. AB adhesive film body; 11. Release film; 12. OCA optical adhesive layer I; 13. OCA optical adhesive layer II; 14. PET film; 2. Fingerprint area. Detailed Implementation

[0021] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0022] Reference Figure 1-2 This utility model discloses an irregularly shaped AB adhesive film, which includes a release film 11 and a PET film 14. Both the release film 11 and the PET film 14 have two layers. The upper and lower release film layers 11 and PET film layers 14 have the same thickness. A fingerprint area 2 is provided on the upper side of the upper release film 11. The fingerprint area 2 is circular and its range is larger than that of the screen fingerprint sensor. The overall thickness of the AB adhesive film is 400um, and the thickness of the fingerprint area 2 is 180um.

[0023] An OCA optical adhesive layer I 12 is provided between the upper release film 11 and the upper PET film 14. Both OCA optical adhesive layer I 12 and OCA optical adhesive layer II 13 are pressure-sensitive resins cured by heat or light. The upper release film 11 and the upper PET film 14 are bonded together by OCA optical adhesive layer I 12. An OCA optical adhesive layer II 13 is provided between the upper PET film 14 and the lower PET film 14, and is also bonded together by OCA optical adhesive layer II 13. The thickness of OCA optical adhesive layer II 13 located directly below the fingerprint area 2 is less than the thickness of its outer periphery. The thickness of OCA optical adhesive layer I 12 and OCA optical adhesive layer II 13 is 25µm-250µm, and the peel strength of OCA optical adhesive layer I 12 and OCA optical adhesive layer II 13 is 100gf / 25mm-2500gf / 25mm.

[0024] A PSA silicone layer 15 is provided between the lower PET film 14 and the lower release film 11. The lower PET film 14 and the lower release film 11 are bonded together by the PSA silicone layer 15. The thickness of the PSA silicone layer 15 is 10um-50um, and the peel force of the PSA silicone layer 15 is 1gf / 25mm-500gf / 25mm.

[0025] In Example 1, OCA optical adhesive layer I 12 and OCA optical adhesive layer II 13 of the same thickness are used in the fingerprint area 2. Then, the upper release film 11 is peeled off, the tempered glass is attached, and the finished product is made and attached to the mobile phone screen. Then, the fingerprint area 2 is pressed lightly by hand. After multiple experiments, it takes 6-7 attempts to unlock the screen each time.

[0026] In Example 2, the thickness of OCA optical adhesive layer I 12 in the fingerprint area 2 is greater than that of OCA optical adhesive layer II 13, while the thickness is the same in other areas. Then, the upper release film 11 is peeled off, and the tempered glass is attached to form a finished product, which is then attached to the mobile phone screen. Then, the fingerprint area 2 is pressed lightly by hand. After multiple experiments, it takes 4-5 attempts to unlock the screen each time.

[0027] In Example 3, the thickness of OCA optical adhesive layer I 12 in the fingerprint area 2 is less than that of OCA optical adhesive layer II 13, while the thickness is the same in other areas. Then, the upper release film 11 is peeled off, and the tempered glass is attached to form a finished product, which is then adhered to the mobile phone screen. Then, the fingerprint area 2 is pressed lightly by hand. After multiple experiments, it is found that only 1-2 attempts are needed to unlock the screen each time.

[0028] Working principle: During installation, first peel off the upper release film 11, then attach it to the tempered glass to make the finished product; during use, peel off the lower release film 11 and stick it to the phone screen, then gently press the fingerprint area 2 to unlock the phone.

[0029] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A shaped AB adhesive film, characterized in that, include: Release film (11) and PET film (14), both release film (11) and PET film (14) have two layers. The upper release film (11) has a fingerprint area (2) on its upper side. An OCA optical adhesive layer I (12) is provided between the upper release film (11) and the upper PET film (14). The upper release film (11) and the upper PET film (14) are bonded together by the OCA optical adhesive layer I (12). The upper PET film (14) and the lower PET film (14) are bonded together. An OCA optical adhesive II layer (13) is provided. The upper PET film (14) and the lower PET film (14) are bonded together by the OCA optical adhesive II layer (13). The thickness of the OCA optical adhesive II layer (13) located directly below the fingerprint area (2) is less than the thickness of its outer periphery. A PSA silicone layer (15) is provided between the lower PET film (14) and the lower release film (11). The lower PET film (14) and the lower release film (11) are bonded together by the PSA silicone layer (15).

2. The irregularly shaped AB adhesive film according to claim 1, characterized in that, The release film (11) in the upper and lower layers has the same thickness.

3. The irregularly shaped AB adhesive film according to claim 2, characterized in that, The two PET films (14) have the same thickness.

4. The irregularly shaped AB adhesive film according to claim 3, characterized in that, The fingerprint area (2) is circular and its range is larger than that of the screen fingerprint.

5. The irregularly shaped AB adhesive film according to claim 4, characterized in that, The OCA optical adhesive layer I (12) and OCA optical adhesive layer II (13) are pressure-sensitive resins cured by heat or light.

6. The irregularly shaped AB adhesive film according to claim 5, characterized in that, The overall thickness of the AB adhesive film is 400um, and the thickness of the fingerprint area (2) is 180um.

7. The irregularly shaped AB adhesive film according to claim 6, characterized in that, The thickness of the OCA optical adhesive layer I (12) and the OCA optical adhesive layer II (13) is 25um-250um, and the thickness of the PSA silicone layer (15) is 10um-50um.

8. The irregularly shaped AB adhesive film according to claim 7, characterized in that, The peel strength of the OCA optical adhesive layer I (12) and the OCA optical adhesive layer II (13) is 100gf / 25mm-2500gf / 25mm, and the peel strength of the PSA silicone layer (15) is 1gf / 25mm-500gf / 25mm.

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