A graphite substrate composite heat dissipation film

Abstract

The present invention provides a graphite substrate composite heat dissipation film, which comprises: a release layer, a graphite substrate layer and a protective layer. The release layer is compounded on one side of the graphite substrate layer, and the protective layer is compounded on the other side of the graphite substrate layer. The release layer includes a release film, which is compounded on one side of the graphite substrate layer through a first double-sided adhesive, and the side of the release film facing the graphite substrate layer has a grid structure, and the release film is cut along the width direction in the middle. The graphite substrate layer is laminated and compounded by at least two layers of graphite unit thin films. The protective layer includes a silica gel protective film, which is compounded on the other side of the graphite substrate layer through a second double-sided adhesive, and the silica gel protective film is cut along the width direction in the middle. The graphite substrate composite heat dissipation film of the present invention realizes peeling from the middle by segmentally designing the release layer and the protective layer, which is beneficial to avoiding the problem of wrinkling during peeling. At the same time, by designing the edge of the graphite substrate layer, it is beneficial to protect the edge of the graphite substrate layer.

Description

Technical Field

[0001] The present invention relates to the technical field of heat dissipation films, and particularly to a graphite substrate composite heat dissipation film. Background Art

[0002] For electronic products, it is often necessary to provide functional film products inside the products to achieve corresponding purposes, such as heat dissipation, light reflection, etc. For laptops, it is necessary to provide film products on the main board inside the laptops that can achieve functions such as light reflection, heat dissipation, shielding, etc. However, when the existing heat dissipation films are peeled off their release layers, they are slowly torn off from one side of the release layer. In this way, due to the interaction between the release layer and the heat dissipation layer, the heat dissipation layer is prone to wrinkling, which is not conducive to the peeling of the release layer. At the same time, there is also a problem that the edges of the existing heat dissipation films are prone to breakage. Therefore, in view of the above problems, it is necessary to propose a further solution. Summary of the Invention

[0003] The present invention aims to provide a graphite substrate composite heat dissipation film to overcome the deficiencies in the prior art.

[0004] To solve the above technical problems, the technical solution of the present invention is:

[0005] A graphite substrate composite heat dissipation film, which comprises: a release layer, a graphite substrate layer, and a protective layer. The release layer is compounded on one side of the graphite substrate layer, and the protective layer is compounded on the other side of the graphite substrate layer;

[0006] The release layer includes a release film, which is compounded on one side of the graphite substrate layer through a first double-sided adhesive, and the side of the release film facing the graphite substrate layer has a grid structure, and the release film is cut along the width direction in the middle;

[0007] The graphite substrate layer is formed by laminating and compounding at least two layers of graphite unit thin films;

[0008] The protective layer includes a silicone protective film, which is compounded on the other side of the graphite substrate layer through a second double-sided adhesive, and the silicone protective film is cut along the width direction in the middle.

[0009] As an improvement of the graphite substrate composite heat dissipation film of the present invention, the grid structure is a plurality of raised portions arranged vertically and horizontally on one side of the release film, and the raised portions are integrally formed with the release film where they are located.

[0010] As an improvement of the graphite substrate composite heat dissipation film of the present invention, the first double-sided adhesive includes: a middle PET substrate and acrylic adhesive layers formed on both sides of the PET substrate.

[0011] As an improvement of the graphite substrate composite heat dissipation film of the present invention, the graphite unit thin film is two layers, and the two graphite unit thin films are laminated and compounded together through another second double-sided adhesive layer.

[0012] As an improvement of the graphite substrate composite heat dissipation film of the present invention, the second double-sided adhesive includes: a middle PET substrate and acrylic adhesive layers formed on both sides of the PET substrate.

[0013] As an improvement of the graphite substrate composite heat dissipation film of the present invention, the contour edges of the release layer and the protective layer compounded on the graphite substrate layer are arranged to extend beyond the contour edge of the middle graphite substrate layer.

[0014] As an improvement of the graphite substrate composite heat dissipation film of the present invention, the silica gel protective film includes: a middle silica gel substrate, a blue polyester film on one side of the middle silica gel substrate, and a transparent polyester film on the other side of the middle silica gel substrate.

[0015] As an improvement of the graphite substrate composite heat dissipation film of the present invention, a layer of PET insulating layer is further provided between the protective layer and the graphite substrate layer.

[0016] As an improvement of the graphite substrate composite heat dissipation film of the present invention, a relief notch is provided at one side edge of the graphite substrate layer, and the cut on the release layer and the protective layer extends into the relief notch.

[0017] As an improvement of the graphite substrate composite heat dissipation film of the present invention, a pull tab extending beyond the edge of the protective layer is further provided at a position on the release layer close to the cut.

[0018] Compared with the prior art, the beneficial effects of the present invention are: the graphite substrate composite heat dissipation film of the present invention realizes self-peeling from the middle by segmentally designing the release layer and the protective layer, which is beneficial to avoiding the problem of wrinkling during peeling. At the same time, by performing a edge wrapping design on the graphite substrate layer, it is beneficial to protect the edge of the graphite substrate layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a schematic diagram of the layer structure decomposition of an embodiment of the graphite substrate composite heat dissipation film of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] As Figure 1 shown, the first embodiment of the present invention provides a graphite substrate composite heat dissipation film, which includes: a release layer 1, a graphite substrate layer 2, and a protective layer 3. The release layer 1 is compounded on one side of the graphite substrate layer 2, and the protective layer 3 is compounded on the other side of the graphite substrate layer 2.

[0023] In order to protect the contour edge of the graphite substrate layer 2, in this embodiment, a edge wrapping design is carried out on the graphite substrate layer 2, that is, the contour edges of the release layer 1 and the protective layer 3 compounded on the graphite substrate layer 2 extend beyond the contour edge of the middle graphite substrate layer 2. In this way, the contour edge of the graphite substrate layer 2 is set to be retracted and will not directly contact the outside, playing a good protective role.

[0024] The above-mentioned release layer 1 includes a release film, which is compounded on one side of the graphite substrate layer 2 through a first double-sided adhesive 4. In one embodiment, the first double-sided adhesive 4 includes: a middle PET substrate and acrylic adhesive layers formed on both sides of the PET substrate. The thickness of the above-mentioned first double-sided adhesive 4 is preferably 0.01 mm.

[0025] When the release film is attached, in order to avoid generating bubbles, the side of the release film facing the graphite substrate layer 2 has a grid structure. In one embodiment, the grid structure is a number of raised portions arranged in a criss-cross pattern on one side of the release film, and the raised portions are integrally formed with the release film where they are located. In this way, the spaces between the raised portions communicate with each other to form a channel suitable for exhausting air. Thus, when attaching, as the release film is attached, the bubbles can be discharged along the exhaust channel, which is beneficial to the attachment of the release film.

[0026] When the release film is used, it is peeled off from the graphite substrate layer 2. In order to facilitate the problem of wrinkling during peeling, the release film is cut along the width direction in the middle. In this way, a segmented design is adopted, and during peeling, it can be peeled from the middle to both sides. At this time, since both sides exert forces on the graphite substrate layer 2 and the two force directions are opposite, they can cancel each other out, thus achieving the effect of avoiding wrinkling of the graphite substrate layer 2.

[0027] The graphite substrate layer 2 is used to achieve the heat dissipation function of the graphite substrate composite heat dissipation film in this embodiment. The graphite substrate layer 2 is formed by laminating at least two layers of graphite unit thin films 21. The purpose of this setting is that a single graphite unit thin film 21 cannot be easily made very thick by the process. Therefore, in the form of laminating multiple graphite unit thin films 21, it is beneficial to meet the thickness usage requirements.

[0028] In one embodiment, there are two graphite unit thin films 21, and the two graphite unit thin films 21 are laminated and combined together through a second double-sided adhesive 22. In this embodiment, the second double-sided adhesive 22 includes: a middle PET substrate and acrylic adhesive layers formed on both sides of the PET substrate. The thickness of the above-mentioned second double-sided adhesive 22 is preferably 0.005 mm.

[0029] The above-mentioned protective layer 3 is used to protect the other side of the graphite substrate layer 2. Specifically, the protective layer 3 includes a silica gel protective film, which is laminated on the other side of the graphite substrate layer 2 through a second double-sided adhesive 31. Here, the second double-sided adhesive 31 is the second double-sided adhesive 22 used to laminate the graphite unit thin films 21, and their layer structures and thickness dimensions are the same.

[0030] In addition, a PET insulating layer 5 is provided between the protective layer 3 and the graphite substrate layer 2, and a layer of ink that plays a matte role is also coated on the PET insulating layer 5. At this time, the graphite substrate layer 2 is directly laminated with the PET insulating layer 5, and the PET insulating layer 5 is laminated on the other side of the graphite substrate layer 2 through the second double-sided adhesive 31.

[0031] In one embodiment, the silica gel protective film includes: a middle silica gel substrate, a blue polyester film on one side of the middle silica gel substrate, and a transparent polyester film on the other side of the middle silica gel substrate. Among them, the thickness of the middle silica gel substrate is preferably 10 μm; the thickness of the blue polyester film is preferably 50 μm; the thickness of the transparent polyester film is preferably 25 μm.

[0032] Since the silica gel protective film is peeled off from the graphite substrate layer 2 during use, in order to facilitate peeling and avoid wrinkling problems, the middle of the silica gel protective film is cut along the width direction. Such a segmented design can be peeled from the middle to both sides during peeling. At this time, since both sides exert forces on the graphite substrate layer 2 and the two force directions are opposite, they can cancel each other out, achieving the effect of avoiding wrinkling of the graphite substrate layer 2.

[0033] As described above, the release film and the silicone protective film are cut along the width direction in the middle. In order to facilitate the grasping of the release film and the silicone protective film, the cutting structures of the two are designed in cooperation with the notch 23 on the graphite substrate layer 2. Specifically, one side edge of the graphite substrate layer 2 has an avoidance notch 23, and the cuts on the release layer 1 and the protective layer 3 extend into the avoidance notch 23. At the same time, the release layer 1 also has a pull tab 11 that extends beyond the edge of the protective layer 3 near the cut. In this way, when the release film and the silicone protective film are peeled off, they will not contact the graphite substrate layer 2, avoiding affecting the peeling of the release film and the silicone protective film.

[0034] In summary, the graphite substrate composite heat dissipation film of the present invention realizes self-peeling from the middle by segmenting the release layer and the protective layer, which is beneficial to avoiding the problem of wrinkling during peeling. At the same time, through the edge wrapping design of the graphite substrate layer, it is beneficial to protect the edge of the graphite substrate layer.

[0035] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0036] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A graphite substrate composite heat dissipation film, characterized in that, the graphite substrate composite heat dissipation film includes: a release layer, a graphite substrate layer, and a protective layer. The release layer is laminated on one side of the graphite substrate layer, and the protective layer is laminated on the other side of the graphite substrate layer; the release layer includes a release film, which is laminated on one side of the graphite substrate layer through a first double-sided adhesive, and the side of the release film facing the graphite substrate layer has a grid structure. The release film is cut along the width direction in the middle; the grid structure is a number of raised portions arranged vertically and horizontally on one side of the release film, and the raised portions are integrally formed with the release film where they are located; the graphite substrate layer is laminated and composed of at least two layers of graphite unit thin films; the protective layer includes a silicone protective film, which is laminated on the other side of the graphite substrate layer through a second double-sided adhesive, and the silicone protective film is cut along the width direction in the middle; one side edge of the graphite substrate layer has an avoidance notch, and the cuts on the release layer and the protective layer extend into the avoidance notch; there is also a pull tab on the release layer near the cut that extends beyond the edge of the protective layer.

2. The graphite substrate composite heat dissipation film according to claim 1, characterized in that, the first double-sided adhesive includes: a middle PET substrate and acrylic adhesive layers formed on both sides of the PET substrate.

3. The graphite substrate composite heat dissipation film according to claim 1, characterized in that, there are two layers of graphite unit thin films, and the two layers of graphite unit thin films are laminated and combined together through another second double-sided adhesive.

4. The graphite substrate composite heat dissipation film according to claim 1 or 3, characterized in that, the second double-sided adhesive includes: a middle PET substrate and acrylic adhesive layers formed on both sides of the PET substrate.

5. The graphite substrate composite heat dissipation film according to claim 1, characterized in that, the contour edges of the release layer and the protective layer laminated on the graphite substrate layer extend beyond the contour edge of the middle graphite substrate layer.

6. The graphite substrate composite heat dissipation film according to claim 1, characterized in that, the silicone protective film includes: a middle silicone substrate, a blue polyester film on one side of the middle silicone substrate, and a transparent polyester film on the other side of the middle silicone substrate.

7. The graphite substrate composite heat dissipation film according to claim 1 or 6, characterized in that, a layer of PET insulating layer is further provided between the protective layer and the graphite substrate layer.

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