Structure for increasing thickness of OCA (Optical Clear Adhesive) laminating adhesive of laminating object

Abstract

The utility model discloses a structure for increasing the thickness of an OCA (Optical Clear Adhesive) laminating adhesive of a laminating object, which comprises a first laminating object and a second laminating object, and one side, facing the second laminating object, of the first laminating object is provided with a first sticking layer for sticking and fixing; a second bonding layer for bonding and fixing is arranged on one side, facing the first bonding object, of the second bonding object, and the first bonding layer and the second bonding layer are bonded and fixed. According to the structure, the first bonding layer and the second bonding layer are combined to form the OCA optical cement thickness required by a customer, and the bonding reliability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of optical adhesives, in particular to a structure for increasing the thickness of the OCA adhesive for bonded objects. Background Technique

[0002] In recent years, the development of electronic technology has been extremely rapid. All kinds of electronic products have penetrated into people's lives, such as televisions, computers, mobile phones, etc. These products all have display screens or touch screens as human-machine interfaces. OCA optical adhesives are colorless and transparent, with a light transmittance of more than 90%, good bonding strength, and can be cured at room temperature or medium temperature. They are special adhesives used for bonding transparent optical components and are widely used in the touch screen industry.

[0003] Currently, the conventional OCA adhesives available on the market have thickness limitations. When the thickness of the OCA adhesive exceeds the limit, the pressure during roll packaging and shipping will be too high. However, in the full bonding operation of the PG composite board structure, due to structural and reliability requirements, customers will require a higher thickness (generally requiring the thickness of the OCA optical adhesive to be above 350u). When the OCA adhesive required by the customer exceeds the thickness of the OCA adhesive specified on the market, it is necessary to sacrifice reliability and select the thickness of the OCA adhesive specified on the market for the bonding operation. Content of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a structure for increasing the thickness of the OCA adhesive for bonded objects.

[0005] The purpose of the utility model is achieved by the following technical solutions:

[0006] A structure for increasing the thickness of the OCA adhesive for bonded objects, comprising: a first bonded object and a second bonded object. A first adhesive layer for pasting and fixing is provided on one side of the first bonded object facing the second bonded object. A second adhesive layer for pasting and fixing is provided on one side of the second bonded object facing the first bonded object. The first adhesive layer and the second adhesive layer are pasted and fixed.

[0007] In one embodiment, both the first adhesive layer and the second adhesive layer are OCA optical adhesives.

[0008] In one embodiment, the thickness of the first adhesive layer is 50μm - 250μm.

[0009] In one embodiment, the thickness of the second adhesive layer is 50μm - 250μm.

[0010] In one embodiment, a light release film and a heavy release film are respectively disposed on both the upper and lower sides of the first adhesive layer and the second adhesive layer. The light release film of the first adhesive layer faces the side close to the first adherend, the light release film of the second adhesive layer faces the side close to the second adherend, and the heavy release films of the first adhesive layer and the second adhesive layer are disposed opposite to each other.

[0011] In one embodiment, both the light release film and the heavy release film are PET films.

[0012] In one embodiment, the light release films of the first adhesive layer and the second adhesive layer have the same thickness, and the heavy release films of the first adhesive layer and the second adhesive layer have the same thickness.

[0013] In one embodiment, the thickness of the light release film is 50μm - 75μm, and the thickness of the heavy release film is 75μm - 100μm.

[0014] In one embodiment, an adhesion enhancing layer is disposed on the side of the first adhesive layer facing the second adhesive layer and on the side of the second adhesive layer facing the first adhesive layer. The adhesion enhancing layer is used to strengthen the adhesion between the first adhesive layer and the second adhesive layer.

[0015] Compared with the prior art, the present utility model has at least the following advantages:

[0016] A structure for improving the thickness of the OCA adhesive of an adherend in the present utility model solves the problem of low reliability caused by insufficient thickness of a single-layer OCA optical adhesive by respectively pasting a first adhesive layer and a second adhesive layer to a first adherend and a second adherend, and then performing a bonding operation between the first adhesive layer and the second adhesive layer, so as to form the OCA optical adhesive thickness required by a customer in the combination of two layers of OCA optical adhesives to improve the bonding reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments will be briefly introduced below.

[0018] Figure 1 It is a schematic structural diagram of a structure for improving the thickness of the OCA adhesive of an adherend provided by the present utility model;

[0019] Figure 2 It is a schematic structural diagram of the first adhesive layer in a structure for improving the thickness of the OCA adhesive of an adherend provided by the present utility model;

[0020] Figure 3Schematic diagram of the structure of the second adhesive layer in a structure for increasing the thickness of the OCA adhesive of the bonded object provided by the present utility model.

[0021] Description of the drawings: 10, the first bonded object; 20, the second bonded object; 30, the first adhesive layer; 40, the second adhesive layer; 50, the light release film; 60, the heavy release film; 70, the tackifier layer. Detailed implementation manners

[0022] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings.

[0023] A structure for increasing the thickness of the OCA adhesive of the bonded object, referring to Figure 1 , includes a first bonded object 10 and a second bonded object 20. The sides of the first bonded object 10 and the second bonded object 20 facing each other are bonded and fixed. In this embodiment, the first bonded object 10 is a cover plate, and the second bonded object 20 is a display screen.

[0024] Referring to Figure 1 , on the side of the first bonded object 10 facing the second bonded object 20, there is provided a first adhesive layer 30 for bonding and fixing, and on the side of the second bonded object 20 facing the first bonded object 10, there is provided a second adhesive layer 40 for bonding and fixing. The first adhesive layer 30 and the second adhesive layer 40 are bonded and fixed so that the first bonded object 10 and the second bonded object 20 are bonded and fixed.

[0025] Referring to Figure 1 , wherein both the first adhesive layer 30 and the second adhesive layer 40 are OCA optical adhesives. The thickness of the first adhesive layer 30 is 50μm - 250μm, and the thickness of the second adhesive layer 40 is 50μm - 250μm.

[0026] Referring to Figure 1 , since during the production process of the OCA optical adhesive, the OCA optical adhesive needs to be coated on the release film and then packaged and shipped in a roll form, and there is pressure during the rolling process, resulting in the thickness of the OCA optical adhesive not being able to be thick. Therefore, the thickness of the OCA optical adhesive on the market is 50μm - 250μm. In order to meet the requirements of the customer's structure and reliability, OCA optical adhesives with a higher thickness need to be selected. Therefore, in this embodiment, a first adhesive layer 30 and a second adhesive layer 40 are respectively provided on the sides of the first bonded object 10 and the second bonded object 20 facing each other. By setting two layers of OCA optical adhesives, the thickness of the OCA optical adhesive between the first bonded object 10 and the second bonded object 20 is increased, thereby improving the reliability of the bonding.

[0027] Referring to Figure 2 and Figure 3, a light release film 50 and a heavy release film 60 are respectively arranged on the upper and lower sides of the first adhesive layer 30 and the second adhesive layer 40. Both the light release film 50 and the heavy release film 60 are PET films. The light release film 50 and the heavy release film 60 are used to protect the first adhesive layer 30 and the second adhesive layer 40 that are not adhered to the article.

[0028] Refer to Figure 2 and Figure 3 , the thicknesses of the light release films 50 of the first adhesive layer 30 and the second adhesive layer 40 are the same, and the thicknesses of the heavy release films 60 of the first adhesive layer 30 and the second adhesive layer 40 are the same. The thickness of the light release film 50 is 50μm - 75μm. The thickness of the heavy release film 60 is 75μm - 100μm.

[0029] Refer to Figure 2 and Figure 3 , the light release film 50 of the first adhesive layer 30 faces the side close to the first adherend 10. By tearing off the light release film 50, one side of the first adhesive layer 30 is adhesively fixed to the first adherend 10. The light release film 50 of the second adhesive layer 40 faces the side close to the second adherend 20. By tearing off the light release film 50, the second adhesive layer 40 is adhesively fixed to the second adherend 20.

[0030] Refer to Figure 2 and Figure 3 , the heavy release film 60 of the first adhesive layer 30 and the heavy release film 60 of the second adhesive layer 40 are arranged oppositely. By tearing off the heavy release films 60 of the first adhesive layer 30 and the second adhesive layer 40, the first adhesive layer 30 and the second adhesive layer 40 are adhesively fixed.

[0031] Furthermore, refer to Figure 2 and Figure 3 , both the first adhesive layer 30 and the second adhesive layer 40 contain graphene oxide for improving adhesion. The graphene oxide improves the adhesiveness of the first adhesive layer 30 and the second adhesive layer 40, so that the adhesiveness between the first adhesive layer 30 and the second adhesive layer 40 and with the first adherend 10 and the second adherend 20 respectively is stronger.

[0032] Furthermore, refer to Figure 2 and Figure 3 , a tackifying layer 70 is arranged on the side of the first adhesive layer 30 facing the second adhesive layer 40 and on the side of the second adhesive layer 40 facing the first adhesive layer 30. The tackifying layer 70 is used to strengthen the adhesiveness between the first adhesive layer 30 and the second adhesive layer 40, so that the combination of the first adhesive layer 30 and the second adhesive layer 40 is more reliable, thereby improving the connection reliability between the first adherend 10 and the second adherend 20.

[0033] Refer to Figure 1, this structure has the first adhesive layer 30 and the second adhesive layer 40 respectively adhered to the first adherend 10 and the second adherend 20, and then the bonding operation between the first adhesive layer 30 and the second adhesive layer 40 is carried out, which solves the problem of low reliability caused by insufficient thickness of the single-layer OCA optical adhesive, so as to form the OCA optical adhesive thickness required by customers in the combination of two layers of OCA optical adhesives to improve the bonding reliability.

[0034] The above embodiments only express several implementation manners of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. A structure for increasing the thickness of OCA adhesive bonding adhesive, characterized in that: include: A first adhesive (10) and a second adhesive (20), wherein a first adhesive layer (30) for adhesive fixation is arranged on a side of the first adhesive (10) facing the second adhesive (20), and a second adhesive layer (40) for adhesive fixation is arranged on a side of the second adhesive (20) facing the first adhesive (10), and the first adhesive layer (30) and the second adhesive layer (40) are adhesively fixed.

2. A structure for increasing the thickness of OCA bonding adhesive of a bonding object according to claim 1, characterized in that: The first adhesive layer (30) and the second adhesive layer (40) are both OCA optical adhesives.

3. The structure for increasing the thickness of the OCA bonding adhesive of the bonding object according to claim 2, characterized in that: The thickness of the first adhesive layer (30) is 50 μm-250 μm.

4. The structure for increasing the thickness of the OCA bonding adhesive of the bonding object according to claim 3, characterized in that: The thickness of the second adhesive layer (40) is 50 μm-250 μm.

5. The structure for increasing the thickness of the OCA bonding adhesive of the bonding object according to claim 4, characterized in that: A light release film (50) and a heavy release film (60) are respectively arranged on the upper and lower sides of the first adhesive layer (30) and the second adhesive layer (40); the light release film (50) of the first adhesive layer (30) faces the side close to the first adhered object (10), and the light release film (50) of the second adhesive layer (40) faces the side close to the second adhered object (20); the heavy release film (60) of the first adhesive layer (30) and the heavy release film (60) of the second adhesive layer (40) are arranged opposite to each other.

6. The structure for increasing the thickness of the OCA bonding adhesive of the bonding object according to claim 5, characterized in that: The light release film (50) and the heavy release film (60) are both PET films.

7. The structure for increasing the thickness of the OCA bonding adhesive of the bonding object according to claim 6, characterized in that: The thickness of the light release film (50) of the first adhesive layer (30) and the second adhesive layer (40) are both the same, and the thickness of the heavy release film (60) of the first adhesive layer (30) and the second adhesive layer (40) are both the same.

8. The structure for increasing the thickness of the OCA bonding adhesive of the bonding object according to claim 7, characterized in that: The thickness of the light release film (50) is 50 μm-75 μm, and the thickness of the heavy release film (60) is 75 μm-100 μm.

9. The structure for increasing the thickness of the OCA bonding adhesive of a bonding object according to claim 5, characterized in that: An adhesion promoting layer (70) is provided on the side of the first adhesive layer (30) facing the second adhesive layer (40) and on the side of the second adhesive layer (40) facing the first adhesive layer (30). The adhesion promoting layer (70) is used to enhance the adhesion between the first adhesive layer (30) and the second adhesive layer (40).

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