Heat conduction type composite silica gel sheet

Abstract

The utility model belongs to the technical field of silica gel, and particularly relates to a heat conduction type composite silica gel sheet which comprises a self-adhesive layer, a heat conduction copper pipe layer and a silica gel base layer which are sequentially stacked from top to bottom, a peelable dustproof layer is arranged at the upper end of the self-adhesive layer, and the heat conduction copper pipe layer is arranged between the self-adhesive layer and the silica gel base layer. And flame-retardant layers are arranged in the heat-conducting copper pipe layer in a crisscross manner. A metal powder particle layer for improving the heat-conducting property is arranged at the lower end of the heat-conducting copper pipe layer; a graphene layer is arranged between the silica gel base layer and the metal powder particle layer, an anti-falling annular groove is formed in the outer surface of the silica gel base layer, an anti-falling convex ring is arranged at the end, close to the silica gel base layer, of the graphene layer, and the anti-falling convex ring extends into the anti-falling annular groove to form clamping connection.

Description

TECHNICAL FIELD

[0001] The utility model belongs to silica gel sheet technical field especially relates to a heat conducting type composite silica gel sheet. BACKGROUND

[0002] With the development of electronic devices to high power, high integration, the heat dissipation problem is increasingly prominent. As an important thermal interface material, heat-conducting silica gel sheet is widely used in the heat dissipation system of electronic devices. However, the traditional heat-conducting silica gel sheet has the problems of insufficient thermal conductivity, large interface thermal resistance and poor mechanical properties, which is difficult to meet the heat dissipation requirements of high-performance electronic devices. SUMMARY

[0003] The utility model discloses a heat conducting type composite silica gel sheet which aims at solving the above technical problems in the prior art.

[0004] To achieve the above-mentioned purpose, the utility model embodiment provides a kind of heat conducting type composite silica gel sheet, including from top to bottom in turn stacked self-adhesive layer, heat-conducting copper pipe layer and silica gel base layer, the upper end of self-adhesive layer is equipped with peelable dustproof layer, heat-conducting copper pipe layer is equipped between self-adhesive layer and silica gel base layer, heat-conducting copper pipe layer is equipped with longitudinal and transverse cross arrangement's flame-retardant layer. The lower end of heat-conducting copper pipe layer is equipped with metal powder particle layer for improving thermal conductivity;Graphene layer is equipped between silica gel base layer and metal powder particle layer, and the outer surface of silica gel base layer is equipped with anti-drop annular groove, and the end of graphene layer close to silica gel base layer is equipped with anti-drop boss, and anti-drop boss is formed into clamping by entering anti-drop annular groove.

[0005] Further, metal powder particle layer includes first sublayer, second sublayer and third sublayer from bottom to top in turn, wherein the first sublayer is the alumina powder of particle size 10-20 μm, the second sublayer is the boron nitride powder of particle size 5-10 μm, and the third sublayer is the aluminum nitride powder of particle size 1-5 μm, and each sublayer is formed into continuous gradient transition by hot pressing.

[0006] Further, nickel-plated carbon fiber layer is equipped between graphene layer and third sublayer, and the thickness is 0.15 mm.

[0007] Further, the inner side wall of anti-drop annular groove is equipped with clamping groove, and the anti-drop boss on the corresponding anti-drop boss is equipped with clamping protrusion, and clamping protrusion is formed into clamping by entering clamping groove.

[0008] Further, peelable dustproof layer adopts PE release film, and the thickness is 0.05 mm.

[0009] Further, self-adhesive layer adopts pressure sensitive adhesive, and the thickness is 0.1 mm.

[0010] Further, the thickness of graphene layer is 0.05 mm.

[0011] Further, the outer surface of the heat-conducting copper pipe layer is coated with an oxidation-resistant layer, the heat-conducting copper pipe layer is provided with a cavity, and the fire-retardant layer is arranged in the cavity and attached to the inner top wall and the inner bottom wall of the heat-conducting copper pipe.

[0012] Further, the fire-retardant layer is made of aramid fiber cloth and has a thickness of 0.05 mm.

[0013] The heat-conducting composite silica gel sheet provided by the embodiment of the utility model has at least one of the following technical effects:

[0014] The detachable dustproof layer is used for protecting the self-adhesive layer from dust and pollution, and ensuring the adhesion before installation. The self-adhesive layer is made of high-performance adhesive, which facilitates the user to paste the silica gel sheet on the target heat dissipation surface. The heat-conducting copper pipe layer is embedded between the self-adhesive layer and the silica gel base layer, and is provided with the fire-retardant layer which is longitudinally and transversely crossed, thereby enhancing the heat conduction path and improving the safety of the material to prevent the fire risk caused by high temperature. The metal powder layer further improves the heat conduction performance by uniformly dispersing metal particles (such as aluminum powder and copper powder). The graphene layer is between the silica gel base layer and the metal powder layer, which utilizes the high heat conductivity of graphene to further accelerate the heat transfer while maintaining the light and thin characteristics of the material. The silica gel base layer serves as the support of the whole structure, has good flexibility and weather resistance, and ensures that the silica gel sheet can adapt to various complex installation environments. The anti-falling design that the outer surface of the silica gel base layer is provided with an anti-falling annular groove, and the end of the graphene layer close to the silica gel base layer is provided with an anti-falling convex ring, effectively prevents the falling between the layers, and enhances the stability of the overall structure. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.

[0016] Figure 1 The overall structure schematic diagram of the heat-conducting composite silica gel sheet provided by the embodiment of the utility model is shown in the figure.

[0017] Figure 2 The Figure 1 partial enlarged view A is shown in the figure.

[0018] In the figure, various reference signs are as follows:

[0019] 100, self-adhesive layer; 110, detachable dustproof layer;

[0020] 200, heat-conducting copper pipe layer; 210, fire-retardant layer; 220, oxidation-resistant layer; 230, cavity;

[0021] 300, metal powder particle layer; 310, first sub-layer; 320, second sub-layer; 330, third sub-layer; 340, nickel-plated carbon fiber layer;

[0022] 400, graphene layer; 410, anti-falling annular groove; 420, anti-falling convex ring; 430, clamping position groove; 440, clamping position protrusion;

[0023] 500, silica gel base layer. DETAILED DESCRIPTION

[0024] The embodiments of the present application will be described in detail below, examples of which are shown in the 1-2 drawings, wherein the same or similar notations represent the same or similar elements or elements with the same or similar functions throughout. The following will be described by referring to the drawings. Figures 1-2 The described embodiments are exemplary, and are intended to explain the embodiments of the present application, and cannot be understood as a limitation of the present application.

[0025] In the description of the embodiments of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0026] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0027] In the embodiments of the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0028] In an embodiment of the utility model, provide a kind of heat-conducting type composite silica gel sheet, including from top to bottom in turn stacked self-adhesive layer 100, heat-conducting copper pipe layer 200 and silica gel base layer 500, the upper end of self-adhesive layer 100 is equipped with peelable dustproof layer 110, heat-conducting copper pipe layer 200 is equipped between self-adhesive layer 100 and silica gel base layer 500, heat-conducting copper pipe layer 200 is equipped with longitudinal and transverse cross arrangement flame-retardant layer 210 in it.The lower end of heat-conducting copper pipe layer 200 is equipped with metal powder particle layer 300 for improving heat-conducting performance;Graphene layer 400 is equipped between silica gel base layer 500 and metal powder particle layer 300, anti-drop annular groove 410 is equipped on the outer surface of silica gel base layer 500, anti-drop convex ring 420 is equipped at the end of graphene layer 400 close to silica gel base layer 500, and anti-drop convex ring 420 is inserted into anti-drop annular groove 410 to form clamping.

[0029] Specifically, peelable dustproof layer 110 is used to protect self-adhesive layer 100 from dust and pollution, ensuring the adhesion before installation. Self-adhesive layer 100 is made of high-performance adhesive, making it easy for users to paste the silica gel sheet onto the target heat dissipation surface. Heat-conducting copper pipe layer 200 is embedded between self-adhesive layer 100 and silica gel base layer 500, with internal longitudinal and transverse cross arrangement flame-retardant layer 210, not only enhancing the heat conduction path, but also improving the safety of the material, preventing fire risks caused by high temperature. Metal powder particle layer 300 further improves the heat-conducting performance through evenly dispersed metal particles such as aluminum powder and copper powder. Graphene layer 400 is between silica gel base layer 500 and metal powder particle layer 300, utilizing the high thermal conductivity of graphene to further accelerate heat transfer while maintaining the lightweight characteristics of the material. Silica gel base layer 500 serves as the support of the entire structure, with good flexibility and weather resistance, ensuring that the silica gel sheet can adapt to various complex installation environments. Anti-drop design silica gel base layer 500 has anti-drop annular groove 410 on its outer surface, while graphene layer 400 has anti-drop convex ring 420 at its end close to silica gel base layer 500. The clamping design of the two effectively prevents the layers from falling apart, enhancing the stability of the overall structure.

[0030] Further, metal powder particle layer 300 includes first sub-layer 310, second sub-layer 320, and third sub-layer 330 from bottom to top, wherein first sub-layer 310 is alumina powder with a particle size of 10-20 μm, second sub-layer 320 is boron nitride powder with a particle size of 5-10 μm, and third sub-layer 330 is aluminum nitride powder with a particle size of 1-5 μm. Each sub-layer is continuously graded through hot pressing. Specifically, the particle size of the three layers of material (alumina, boron nitride, and aluminum nitride) gradually decreases from coarse to fine (10-20 μm → 5-10 μm → 1-5 μm), and the continuous gradient transition is formed through hot pressing, which can reduce interfacial stress and avoid interlayer peeling or cracking caused by differences in material physical properties (such as thermal expansion coefficient and hardness).

[0031] Further, a nickel-plated carbon fiber layer 340 is provided between the graphene layer and the third sub-layer 330, with a thickness of 0.15 mm. The nickel-plated carbon fiber layer 340 has high thermal conductivity and can serve as a bridge for heat conduction, further enhancing the overall structure's heat dissipation efficiency and electrical performance.

[0032] Further, the inner side wall of the anti-dropping annular groove 410 is provided with a clamping groove 430, and the anti-dropping convex ring 420 is provided with a clamping protrusion 440 corresponding to the clamping groove 430. The clamping protrusion 440 extends into the clamping groove 430 to form a clamping connection. Specifically, the clamping structure of the clamping groove 430 and the clamping protrusion 440 further enhances the bonding force between the graphene layer 400 and the silica gel base layer 500. This design effectively prevents relative movement or falling between layers due to factors such as vibration and temperature changes, thereby improving the overall structural stability of the composite silica gel sheet.

[0033] Further, the peelable dustproof layer 110 is made of PE release film with a thickness of 0.05 mm. As a common protective material, PE release film has relatively low cost. Using a 0.05 mm thick PE release film as the peelable dustproof layer 110 not only meets the protection requirements but also reduces production costs.

[0034] Further, the self-adhesive layer 100 is made of pressure-sensitive adhesive with a thickness of 0.1 mm. As the main material of the self-adhesive layer 100, pressure-sensitive adhesive can provide strong adhesive strength to ensure close contact between the composite silica gel sheet and the heat dissipation surface. This helps to improve heat conduction efficiency and reduce interfacial thermal resistance.

[0035] Further, the thickness of the graphene layer 400 is 0.05 mm. This helps to improve the overall heat dissipation performance of the composite silica gel sheet, reduce the temperature of the heat source, and thus prolong the service life of electronic devices.

[0036] Further, the outer surface of the heat-conducting copper pipe layer 200 is coated with an oxidation-resistant layer 220, and the heat-conducting copper pipe layer 200 has a cavity 230 inside. The flame-retardant layer 210 is arranged inside the cavity 230 and adheres to the inner top wall and inner bottom wall of the heat-conducting copper pipe. The oxidation-resistant layer 220 on the outer surface of the heat-conducting copper pipe layer 200 can prevent oxidation reaction under high temperature environment, thereby prolonging the service life and maintaining stable heat conduction performance.

[0037] Further, the flame-retardant layer 210 is made of aramid fiber cloth with a thickness of 0.05 mm. Although aramid fiber cloth has a certain thermal resistance, the 0.05 mm thickness design minimizes its impact on overall heat dissipation performance. At the same time, as an additional thermal insulation layer, aramid fiber cloth can reduce heat loss through the heat-conducting copper pipe layer 200, thereby improving heat conduction efficiency.

[0038] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A thermally conductive composite silicone sheet, characterized in that, The system comprises, from top to bottom, a self-adhesive layer (100), a thermally conductive copper tube layer (200), and a silicone base layer (500). The upper end of the self-adhesive layer (100) has a peelable dustproof layer (110). A thermally conductive copper tube layer (200) is located between the self-adhesive layer (100) and the silicone base layer (500). The thermally conductive copper tube layer (200) contains a crisscrossing flame-retardant layer (210). The lower end of the thermally conductive copper tube layer (200) has a... A metal powder layer (300) for improving thermal conductivity; a graphene layer (400) is provided between the silicone base layer (500) and the metal powder layer (300); an anti-detachment annular groove (410) is provided on the outer surface of the silicone base layer (500); an anti-detachment protrusion (420) is provided at one end of the graphene layer (400) near the silicone base layer (500); the anti-detachment protrusion (420) extends into the anti-detachment annular groove (410) to form a snap-fit.

2. The thermally conductive composite silicone sheet according to claim 1, characterized in that, The metal powder layer (300) includes, from bottom to top, a first sublayer (310), a second sublayer (320), and a third sublayer (330), wherein the first sublayer (310) is alumina powder with a particle size of 10-20 μm, the second sublayer (320) is boron nitride powder with a particle size of 5-10 μm, and the third sublayer (330) is aluminum nitride powder with a particle size of 1-5 μm, and the sublayers are connected by a continuous gradient transition through hot pressing.

3. The thermally conductive composite silicone sheet according to claim 2, characterized in that, A nickel-plated carbon fiber layer (340) with a thickness of 0.15 mm is provided between the graphene layer (400) and the third sublayer (330).

4. The thermally conductive composite silicone sheet according to claim 1, characterized in that, The inner wall of the anti-detachment annular groove (410) is provided with a locking groove (430), and a locking protrusion (440) is provided on the corresponding anti-detachment protrusion (420). The locking protrusion (440) extends into the locking groove (430) to form a locking connection.

5. The thermally conductive composite silicone sheet according to claim 1, characterized in that, The peelable dustproof layer (110) is made of PE release film with a thickness of 0.05 mm.

6. The thermally conductive composite silicone sheet according to claim 1, characterized in that, The self-adhesive layer (100) is made of pressure-sensitive adhesive and has a thickness of 0.1 mm.

7. The thermally conductive composite silicone sheet according to claim 1, characterized in that, The thickness of the graphene layer (400) is 0.05 mm.

8. The thermally conductive composite silicone sheet according to claim 1, characterized in that, The outer surface of the heat-conducting copper tube layer (200) is coated with an anti-oxidation layer (220). The heat-conducting copper tube layer (200) has a cavity (230). The flame-retardant layer (210) is disposed in the cavity (230) and is attached to the inner top wall and inner bottom wall of the heat-conducting copper tube.

9. The thermally conductive composite silicone sheet according to claim 1, characterized in that, The flame retardant layer (210) is made of aramid fiber cloth with a thickness of 0.05 mm.

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