Aluminum foil foam composite adhesive tape, display module and OLED screen

Abstract

The utility model provides a kind of aluminum foil foam composite adhesive tape, display module and OLED screen, the aluminum foil foam composite adhesive tape includes the aluminum foil layer, first adhesive layer, foam layer, second adhesive layer and release film layer set gradually, the aluminum foil foam composite adhesive tape has excellent bonding performance, impact resistance, electromagnetic shielding performance, heat dissipation performance and corrosion resistance, fully meet its application in display module.

Description

Technical Field

[0001] This utility model belongs to the field of tape technology, specifically relating to an aluminum foil foam composite tape, a display module, and an OLED screen. Background Technology

[0002] With the widespread adoption of OLED screens in mobile phones and other electronic products, copper foil and foam tape are used extensively in display modules (SCF modules). The copper foil serves to conduct heat, dissipate heat, and provide electromagnetic shielding, while the foam provides impact resistance.

[0003] CN220012521U discloses a multifunctional single-conductive copper foil tape, which includes an insulating protective layer, a shielding copper foil, and an IC insulating layer stacked from top to bottom. The shielding copper foil has a component clearance area, and the insulating protective layer has a pad protection area. It has multiple functions of integrating signal shielding, protecting electronic components, and protecting pads.

[0004] CN222226235U discloses an acid-free copper foil tape, comprising a copper foil layer, an acid-free adhesive layer, and a release layer arranged sequentially. By adding the acid-free adhesive layer, the overall acid value of the tape is reduced, resulting in an acid-free copper foil tape that not only has excellent adhesion but also excellent resistance to damp heat, solving the problem of corrosion and discoloration that easily occurs in existing acrylic copper foil tapes. However, the above patents all use copper foil, which is not only expensive but also has poor corrosion resistance.

[0005] Therefore, developing a low-cost aluminum foil foam composite tape with good electromagnetic shielding, heat dissipation, buffering, and corrosion resistance is a technical problem that urgently needs to be solved in this field to address the above-mentioned issues. Utility Model Content

[0006] To address the shortcomings of existing technologies, the purpose of this utility model is to provide an aluminum foil foam composite tape, a display module, and an OLED screen. The aluminum foil foam composite tape has good electromagnetic shielding and heat dissipation performance, and improves corrosion resistance and impact resistance. At the same time, aluminum is low in cost, and the composite of aluminum foil and foam reduces the bonding process in the tape die-cutting process, greatly reducing costs.

[0007] To achieve the objective of this utility model, the following technical solution is adopted:

[0008] In a first aspect, the present invention provides an aluminum foil foam composite tape, the aluminum foil foam composite tape comprising an aluminum foil layer, a first adhesive layer, a foam layer, a second adhesive layer and a release film layer arranged sequentially.

[0009] The aluminum foil foam composite tape provided by this utility model includes an aluminum foil layer, a first adhesive layer, a foam layer, a second adhesive layer, and a release film layer arranged sequentially. The aluminum foil layer has good electromagnetic shielding, heat dissipation performance, and environmental corrosion resistance, and is low in cost. The foam layer has good impact resistance. As a result, the final aluminum foil foam composite tape has excellent adhesion, impact resistance, electromagnetic shielding, heat dissipation, and corrosion resistance, which fully meets its application requirements in display modules.

[0010] As a preferred embodiment of this invention, the aluminum foil layer comprises soft aluminum or hard aluminum.

[0011] As a preferred embodiment of this utility model, the thickness of the aluminum foil layer is 20-35μm, such as 22μm, 24μm, 26μm, 28μm, 30μm, 32μm or 34μm.

[0012] As a preferred embodiment of the present invention, the first adhesive layer comprises an acrylic adhesive layer.

[0013] As a preferred embodiment of this utility model, the second adhesive layer includes any one of an acrylic adhesive layer, an epoxy resin adhesive layer, or a pyrolytic adhesive layer.

[0014] As a preferred embodiment of this utility model, the thickness of the first adhesive layer and the second adhesive layer are each independently 15-30μm, such as 16μm, 18μm, 20μm, 22μm, 24μm, 26μm or 28μm, etc.

[0015] As a preferred embodiment of this utility model, the foam layer includes an acrylic foam layer.

[0016] As a preferred technical solution of this utility model, the thickness of the foam layer is 80-150μm, such as 90μm, 100μm, 110μm, 120μm, 130μm or 140μm.

[0017] As a preferred embodiment of this invention, the release film layer includes a grid-type release film.

[0018] As a preferred technical solution of this utility model, the mesh-type release film includes a PE coated mesh release film or a PET direct-embossed fluorine release film.

[0019] As a preferred embodiment of this invention, the thickness of the release film layer is 50-100μm, such as 60μm, 70μm, 80μm or 90μm.

[0020] As a preferred technical solution of this utility model, the total thickness of the aluminum foil foam composite tape is 200-245μm, such as 210μm, 220μm, 230μm or 240μm.

[0021] Secondly, this utility model provides a display module, which includes aluminum foil foam composite tape as described in the first aspect.

[0022] Thirdly, this utility model provides an OLED screen, which includes the display module as described in the second aspect.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The aluminum foil foam composite tape provided by this utility model includes an aluminum foil layer, a first adhesive layer, a foam layer, a second adhesive layer and a release film layer arranged in sequence. The aluminum foil foam composite tape has excellent bonding performance, impact resistance, electromagnetic shielding performance, heat dissipation performance and corrosion resistance, which fully meets its application requirements in display modules. Attached Figure Description

[0025] Figure 1 A cross-sectional structural diagram of the aluminum foil foam composite tape provided by this utility model;

[0026] Among them, 1-aluminum foil layer, 2-first adhesive layer, 3-foam layer, 4-second adhesive layer, 5-release film layer. Detailed Implementation

[0027] The technical solution of this utility model will be further described below through specific embodiments. Those skilled in the art should understand that the embodiments described are merely illustrative of this utility model and should not be considered as specific limitations thereof.

[0028] Example 1

[0029] This embodiment provides an aluminum foil foam composite tape with a total thickness of 220μm. A cross-sectional structural diagram is shown below. Figure 1 As shown, it includes an aluminum foil layer 1, a first adhesive layer 2, a foam layer 3, a second adhesive layer 4, and a release film layer 5 arranged sequentially.

[0030] Among them, aluminum foil layer 1 is soft aluminum with a thickness of 30μm;

[0031] The first adhesive layer 2 is an acrylic adhesive layer (purchased from Green Field LT300) with a thickness of 20μm;

[0032] Foam layer 3 is an acrylic foam layer (purchased from Deyou US8710B) with a thickness of 100μm;

[0033] The second adhesive layer 4 is an acrylic adhesive layer (purchased from Lvtian LT300) with a thickness of 20μm;

[0034] Release film layer 5 is a PE coated mesh release film (purchased from Degussaino PE embossed mesh film) with a thickness of 50μm.

[0035] Example 2

[0036] This embodiment provides an aluminum foil foam composite tape with a total thickness of 235μm. A cross-sectional structural diagram is shown below. Figure 1 As shown, it includes an aluminum foil layer 1, a first adhesive layer 2, a foam layer 3, a second adhesive layer 4, and a release film layer 5 arranged sequentially.

[0037] Among them, aluminum foil layer 1 is soft aluminum with a thickness of 20μm;

[0038] The first adhesive layer 2 is an acrylic adhesive layer (purchased from Green Field LT300) with a thickness of 15μm;

[0039] Foam layer 3 is an acrylic foam layer (purchased from Deyou US8709B) with a thickness of 90μm;

[0040] The second adhesive layer 4 is a pyrolytic adhesive layer (purchased from Shimei PS8278) with a thickness of 30μm;

[0041] Release film layer 5 is a PET direct-embossed fluorine release film (purchased from Guangyan BR7522) with a thickness of 80μm.

[0042] Example 3

[0043] This embodiment provides an aluminum foil foam composite tape with a total thickness of 230μm. A cross-sectional structural diagram is shown below. Figure 1 As shown, it includes an aluminum foil layer 1, a first adhesive layer 2, a foam layer 3, a second adhesive layer 4, and a release film layer 5 arranged sequentially.

[0044] Among them, aluminum foil layer 1 is soft aluminum with a thickness of 35μm;

[0045] The first adhesive layer 2 is an acrylic adhesive layer (purchased from Green Field LT300) with a thickness of 30μm;

[0046] Foam layer 3 is an acrylic foam layer (purchased from Deyou US8709B) with a thickness of 90μm;

[0047] The second adhesive layer 4 is an epoxy resin adhesive layer (purchased from Jiaoaojiayuan 1130), with a thickness of 15μm;

[0048] Release film layer 5 is a PET direct-embossed fluorine release film (purchased from Guangyan BR7522) with a thickness of 60μm.

[0049] Example 4

[0050] This embodiment provides an aluminum foil foam composite tape, which differs from Embodiment 1 in that the aluminum foil layer 1 is hard aluminum with a thickness of 30μm, while the other structures and parameters are the same as in Embodiment 1.

[0051] Comparative Example 1

[0052] This comparative example provides a copper foil foam composite tape, which differs from Example 1 in that the copper foil layer is electrolytic copper foil with a thickness of 30 μm, while the other structures and parameters are the same as in Example 1.

[0053] Comparative Example 2

[0054] This comparative example provides a copper foil foam composite tape, which differs from Example 1 in that the copper foil layer is rolled copper foil with a thickness of 30 μm, while the other structures and parameters are the same as in Example 1.

[0055] Performance testing:

[0056] (1) Peel strength at room temperature: The test was conducted according to the method provided in GB / T2792-2014.

[0057] (2) 3D appearance: Directly observe the color and corrosion with the naked eye.

[0058] (3) Point impact on metal foil surface: Using a point impact tester, an 11.2g metal ball is dropped freely from a height of 5cm and impacts the metal surface. The instrument collects the energy J1 and the gravitational potential energy J2 of the metal ball. (J2-J1) / J2 is the tape impact energy absorption rate.

[0059] (4) Foam layer foil surface point impact: Using a point impact tester, an 11.2g metal ball is dropped freely from a height of 5cm onto the foam surface. The instrument collects the energy J1 and the gravitational potential energy J2 of the metal ball. (J2-J1) / J2 is the tape impact energy absorption rate %.

[0060] (5) Shielding coefficient: The test shall be conducted in accordance with the method provided in GB / T12190-2021 standard.

[0061] (6) Thermal conductivity: Tested according to the method provided in ASTM D5470-95 standard.

[0062] The aluminum foil foam composite tapes and copper foil foam composite tapes provided in Examples 1-4 and Comparative Examples 1-2 were tested according to the above test methods. The test results are shown in Table 1.

[0063] Table 1

[0064]

[0065] As can be seen from the data in Table 1, the peel strength of the aluminum foil foam composite tapes provided in Examples 1-4 is between 2100-4200 gf / inch. Among them, when hard aluminum is selected for the aluminum foil layer, the peel strength is higher. After being treated in a high temperature and high humidity environment, the 3D appearance of the aluminum foil foam composite tapes provided in Examples 1-4 does not change significantly. They have excellent impact resistance, shielding performance and heat dissipation. At the same time, the use of aluminum foil layer greatly reduces the cost.

[0066] The copper foil foam composite tapes provided in Comparative Examples 1-2 showed corrosion and oxidation after being treated in a high-temperature and high-humidity environment for 3 days, resulting in decreased impact resistance and high cost.

[0067] The applicant declares that this utility model illustrates an aluminum foil foam composite tape, a display module, and an OLED screen through the above embodiments. However, this utility model is not limited to the above embodiments, meaning that this utility model does not necessarily rely on the above process steps to be implemented. Those skilled in the art should understand that any improvements to this utility model, equivalent substitutions of the raw materials used, additions of auxiliary components, and selection of specific methods, etc., all fall within the protection and disclosure scope of this utility model.

Claims

1. An aluminum foil foam composite tape, characterized in that, The aluminum foil foam composite tape comprises an aluminum foil layer, a first adhesive layer, a foam layer, a second adhesive layer, and a release film layer arranged sequentially.

2. The aluminum foil foam composite tape according to claim 1, characterized in that, The aluminum foil layer comprises soft aluminum or hard aluminum; The thickness of the aluminum foil layer is 20-35 μm.

3. The aluminum foil foam composite tape according to claim 1, characterized in that, The first adhesive layer includes an acrylic adhesive layer.

4. The aluminum foil foam composite tape according to claim 1, characterized in that, The second adhesive layer includes any one of an acrylic adhesive layer, an epoxy resin adhesive layer, or a pyrolytic adhesive layer.

5. The aluminum foil foam composite tape according to claim 1, characterized in that, The thickness of the first adhesive layer and the second adhesive layer are each 15-30 μm independently.

6. The aluminum foil foam composite tape according to claim 1, characterized in that, The foam layer includes an acrylic foam layer; The thickness of the foam layer is 80-150 μm.

7. The aluminum foil foam composite tape according to claim 1, characterized in that, The release film layer includes a grid-like release film; The mesh-type release film includes PE coated mesh release film or PET straight-embossed fluorine release film; The thickness of the release film is 50-100 μm.

8. The aluminum foil foam composite tape according to claim 1, characterized in that, The total thickness of the aluminum foil foam composite tape is 200-245 μm.

9. A display module, characterized in that, The display module includes the aluminum foil foam composite tape as described in any one of claims 1-8.

10. An OLED screen, characterized in that, The OLED screen includes the display module as described in claim 9.

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