Surface optical decorative film for plastic middle frame of mobile phone and tablet computer

Abstract

A surface optical decorative film for a plastic middle frame of a mobile phone and a tablet comprises a substrate film material layer, a surface optical decorative film layer, a surface optical decorative film layer, a surface optical decorative film layer, a surface optical decorative film layer and a surface optical decorative film layer which are sequentially laminated and combined, the stripping layer adopts a UV curing type silicone oil coating, and the thickness of the stripping layer is 5-20 microns; the thickness of the optical texture layer is 2-5 microns; the thickness of the ink layer is 8-15 microns; the thickness of the conductive shielding glue layer is 0.05 to 0.1 mm; an adhesive layer is attached, acrylate-based hot melt adhesive is adopted, and the thickness of the adhesive layer is 5-15 microns; the bonding adhesive layer is used for bonding with a glass fiber shell base material; according to the utility model, the appearance decoration of the electronic equipment can be effectively enhanced, and the electronic equipment has good durability, wear resistance and light resistance in actual use, and is not easy to fade or damage after being used for a long time. Through the design of the conductive shielding layer, electromagnetic interference can be effectively isolated, and the stability and signal receiving quality of equipment are improved.

Description

Technical Field

[0001] This utility model relates to the field of decorative film structure technology, specifically an optical decorative film for the surface of plastic frames used in mobile phones and tablets. Background Technology

[0002] With the widespread adoption of smartphones, tablets, and other electronic devices, the market demands increasingly sophisticated designs for these devices. Users are placing higher requirements on the aesthetics, durability, and functionality of these devices. This is especially true for the plastic frames of smartphones and tablets, which often require both attractive aesthetics and electromagnetic interference (EMI) protection to ensure signal stability. However, while existing decorative films have made breakthroughs in aesthetics, they fall short in terms of overall performance, including durability, lightfastness, and electromagnetic shielding. Therefore, there is an urgent need for a surface optical decorative film that can improve aesthetics, functionality, and durability. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a surface optical decorative film for plastic frames of mobile phones and tablets, which can effectively solve the problems mentioned in the background art.

[0004] To solve the above problems, the technical solution adopted by this utility model is: a surface optical decorative film for the plastic frame of mobile phones and tablets, comprising the following sequentially stacked components:

[0005] The substrate film layer is made of polycarbonate film with a thickness of 0.05-0.15mm;

[0006] The release layer is a UV-curable silicone oil coating with a thickness of 5-20μm.

[0007] Optical texture layer, with a thickness of 2-5μm;

[0008] The ink layer has a thickness of 8-15μm;

[0009] The conductive shielding adhesive layer has a thickness of 0.05-0.1mm;

[0010] The bonding adhesive layer uses an acrylic-based hot melt adhesive with a thickness of 5-15μm.

[0011] The adhesive layer is used to bond to the fiberglass shell substrate.

[0012] As a further preferred embodiment of this utility model, the adhesive layer is a thermosetting acrylic adhesive layer.

[0013] As a further preferred embodiment of this utility model, the optical texture layer is a prism array structure with a height of 2-5 μm and a spacing of 10-20 μm.

[0014] As a further preferred embodiment of this utility model, the conductive shielding adhesive layer is made of silver-based conductive adhesive.

[0015] As a further preferred embodiment of this utility model, the conductive shielding adhesive layer is made of carbon nanotube conductive adhesive.

[0016] As a further preferred embodiment of this utility model, the conductive shielding adhesive layer is made of carbon nanotube conductive adhesive.

[0017] As a further preferred embodiment of this utility model, the ink layer is made of ultraviolet-cured ink.

[0018] Compared with the prior art, this utility model provides a surface optical decorative film for plastic frames of mobile phones and tablets, which has the following beneficial effects:

[0019] It effectively enhances the aesthetic appeal of electronic devices and exhibits excellent durability, abrasion resistance, and lightfastness in practical use, resisting fading or damage over long periods. The conductive shielding layer design effectively isolates electromagnetic interference, improving device stability and signal reception quality. Attached Figure Description

[0020] Figure 1 This is a partially enlarged schematic diagram of the structure of this utility model.

[0021] The layers are: 1. Substrate film layer; 2. Release layer; 3. Optical texture layer; 4. Ink layer; 5. Conductive shielding adhesive layer; 6. Adhesive layer. Detailed Implementation

[0022] If the embodiments of this utility model involve descriptions such as "first" or "second", such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0023] In addition, if "and / or" or "and / or" appears in the text, it means three parallel options. For example, "A and / or B" includes option A, option B, or option A and B are satisfied at the same time.

[0024] Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0025] Reference Figure 1 This utility model provides a surface optical decorative film for plastic frames of mobile phones and tablets, comprising the following sequentially stacked components:

[0026] The substrate film layer 1 is made of polycarbonate film with a thickness of 0.05-0.15mm, providing transparency and good mechanical strength to support the processing and stability of other layers;

[0027] Release layer 2 is a UV-curable silicone oil coating with a thickness of 5-20μm, which ensures that the film can be easily peeled off during processing and use without leaving any residue.

[0028] Optical texture layer 3, with a thickness of 2-5 μm;

[0029] Ink layer 4, with a thickness of 8-15μm;

[0030] Conductive shielding adhesive layer 5, with a thickness of 0.05-0.1mm;

[0031] The bonding layer 6 is made of acrylic hot melt adhesive with a thickness of 5-15μm. Acrylic hot melt adhesive has strong adhesion, which can ensure a firm bond between the membrane device and the plastic frame. It also has good temperature resistance and weather resistance, which can meet the needs of different environments.

[0032] As a further preferred embodiment of this utility model, the adhesive layer 6 is a thermosetting acrylic adhesive layer.

[0033] As a further preferred embodiment of this utility model, the optical texture layer 3 is formed into a prism array by nanoimprinting, with a prism angle of 60°, a prism array height of 2-5μm, and a spacing of 10-20μm, which can significantly improve the optical effect of the film layer, give the surface a strong reflective or refractive effect, and improve the decorative performance.

[0034] As a further preferred embodiment of this utility model, the conductive shielding adhesive layer 5 is made of silver-based conductive adhesive, which has a good electromagnetic shielding effect, can effectively isolate electromagnetic interference, prevent external electromagnetic waves from affecting the equipment, and enhance the signal stability of the equipment.

[0035] As a further preferred embodiment of this utility model, the conductive shielding adhesive layer 5 is made of carbon nanotube conductive adhesive, which has a good electromagnetic shielding effect, can effectively isolate electromagnetic interference, prevent external electromagnetic waves from affecting the equipment, and enhance the signal stability of the equipment.

[0036] As a further preferred embodiment of this utility model, the conductive shielding adhesive layer 5 is made of carbon nanotube conductive adhesive with a thickness of 0.06 mm, which reduces material costs while maintaining electromagnetic shielding performance and is suitable for low- to mid-range equipment.

[0037] As a further preferred embodiment of this utility model, the ink layer 4 is made of ultraviolet-cured ink, which has good light resistance, abrasion resistance and corrosion resistance, ensuring that it will not fade or be damaged after long-term use.

[0038] As a specific embodiment of this utility model:

[0039] Process steps:

[0040] 1. The substrate film layer 1 (polycarbonate film) is bonded to the release layer 2 (UV-curable silicone oil coating) through coating and hot pressing processes to ensure that the film material has good transparency and support.

[0041] 2. An optical texture layer 3 is formed on the film surface using nanoimprint technology, and the optical effect is enhanced by precisely controlling the prism angle, array height and spacing.

[0042] 3. Apply UV-curable ink to form ink layer 4, and cure it by UV irradiation to ensure that the ink layer has good light resistance and abrasion resistance.

[0043] 4. Apply and cure the conductive shielding adhesive layer 5 (silver-based conductive adhesive) to form an electromagnetic shielding effect, ensuring that the equipment can resist external electromagnetic interference.

[0044] 5. Apply adhesive layer 6 (acrylate-based hot melt adhesive) to the back of the membrane material, and then tightly bond the membrane device to the plastic frame through a hot pressing process. This provides high decorative effect, durability, and electromagnetic shielding, making it suitable for electronic devices such as smartphones and tablets. It offers an attractive appearance and stable functionality while enhancing the device's anti-interference capabilities.

[0045] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A surface optical decoration film for a plastic middle frame of a mobile phone or tablet, characterized in that, It comprises the following layers which are sequentially laminated and combined: a substrate film layer (1) made of polycarbonate film with a thickness of 0.05-0.15 mm; a peeling layer (2) made of UV-cured silicone oil coating with a thickness of 5-20 μm; an optical texture layer (3) with a thickness of 2-5 μm; an ink layer (4) with a thickness of 8-15 μm; a conductive shielding adhesive layer (5) with a thickness of 0.05-0.1 mm; a laminating adhesive layer (6) made of acrylate-based hot melt adhesive with a thickness of 5-15 μm; the laminating adhesive layer (6) is used for lamination on a plastic middle frame shell. 2.The surface optical decoration film for a plastic middle frame of a mobile phone or a tablet according to claim 1, characterized in that, the laminating adhesive layer (6) is a thermosetting acrylate adhesive layer. 3.The surface optical decoration film for a plastic middle frame of a mobile phone or a tablet according to claim 1, characterized in that, the optical texture layer (3) is a prism array structure with a prism array height of 2-5 μm and a pitch of 10-20 μm. 4.The surface optical decoration film for a plastic middle frame of a mobile phone or a tablet according to claim 1, characterized in that, the conductive shielding adhesive layer (5) is made of silver-based conductive adhesive. 5.The surface optical decoration film for a plastic middle frame of a mobile phone or a tablet according to claim 1, characterized in that, the conductive shielding adhesive layer (5) is made of carbon nanotube conductive adhesive. 6.The surface optical decoration film for a plastic middle frame of a mobile phone or a tablet according to claim 1, characterized in that, the conductive shielding adhesive layer (5) is made of carbon nanotube conductive adhesive. 7.The surface optical decoration film of a plastic middle frame of a mobile phone or a tablet according to claim 1, characterized in that, the ink layer (4) is made of ultraviolet-cured ink.

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