High-temperature-resistant heat-conducting plastic

Abstract

The utility model discloses high-temperature-resistant heat-conducting plastic, which is applied to a cable protective sleeve and comprises a PPS (polyphenylene sulfide) plastic matrix layer, the graphene heat conduction layer is arranged on the upper surface of the PPS plastic matrix layer; the heat-conducting ceramic particle layer is arranged on the outer surface of the graphene heat-conducting layer; wherein the outer surface of the heat-conducting ceramic particle layer is provided with a plurality of protrusions and grooves which are distributed alternately, the height h of the protrusions, the depth d of the grooves and the total thickness H of the heat-conducting ceramic particle layer meet the relation that h is larger than or equal to 1 / 2H and smaller than or equal to 2 / 3H, and d is larger than or equal to 1 / 2H and smaller than or equal to 2 / 3H; the PPS plastic matrix layer is of a porous structure, and the porosity of the PPS plastic matrix layer is 60-80%. Compared with the prior art, the high-temperature-resistant heat-conducting cable has excellent high-temperature-resistant performance and heat-conducting performance, the safety of the cable can be effectively improved, and the service life of the cable can be effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of plastics, in particular to a high-temperature resistant heat-conductive plastic. Background Art

[0002] As a key component in cable protection, cable sheaths' performance directly impacts the cable's service life, safety, and reliability. With the rapid development of modern industry and power systems, performance requirements for cable sheaths are increasing. Currently, cable sheaths are primarily made of plastic, which is widely used in the industry due to its excellent processing properties, insulation performance, and cost-effectiveness.

[0003] However, existing plastics used in cable protective sleeves generally have the following deficiencies: 1) Insufficient high-temperature resistance: In high-temperature environments, such as high-voltage transmission lines, around industrial production equipment, or in underground pipelines, ordinary plastic materials are prone to softening, deformation, or even melting. This will not only reduce the mechanical strength and insulation performance of the cable protective sleeve, but may also cause the cable to be exposed to the external environment, increasing safety hazards. 2) Poor thermal conductivity: The cable will generate heat during operation, and the plastic material itself has poor thermal conductivity and it is difficult to effectively dissipate this heat. Heat accumulation will accelerate the aging of the cable and its insulation material, reducing the service life and transmission efficiency of the cable. In extreme cases, it may even cause serious accidents such as cable overheating and fire.

[0004] Therefore, developing a new type of plastic with both excellent high-temperature resistance and good thermal conductivity is of great significance for improving the performance of cable protective sheaths, extending the service life of cables, and enhancing cable safety. Utility Model Content

[0005] The purpose of the present invention is to provide a high-temperature resistant thermal conductive plastic to address the deficiencies of the prior art, which has excellent high-temperature resistance and thermal conductivity and can effectively improve the safety and service life of cables.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A high-temperature resistant thermally conductive plastic, used for cable protective sheaths, comprising:

[0008] PPS plastic base layer;

[0009] A graphene heat-conducting layer is provided on the upper surface of the PPS plastic base layer;

[0010] a heat-conducting ceramic particle layer, disposed on the outer surface of the graphene heat-conducting layer;

[0011] Among them, the outer surface of the thermally conductive ceramic particle layer is provided with a plurality of alternatingly distributed protrusions and grooves, and the height h of the protrusions, the depth d of the grooves and the total thickness H of the thermally conductive ceramic particle layer satisfy the relationship: 1 / 2H≤h≤2 / 3H, 1 / 2H≤d≤2 / 3H; providing a concave-convex structure on the outer surface of the thermally conductive ceramic particle layer can not only increase the heat dissipation area of ​​the thermally conductive ceramic particle layer, but also further improve the strength of the plastic outer surface.

[0012] The PPS plastic matrix layer is a porous structure, and the porosity of the PPS plastic matrix layer is 60-80%.

[0013] Preferably, the heat-resistant temperature of the plastic is ≥250°C.

[0014] Preferably, the thermal conductivity of the graphene heat-conducting layer is 2000-2500 W / m·K.

[0015] Preferably, the thermally conductive ceramic particle layer is a silicon carbide particle layer or a silicon nitride particle layer.

[0016] Preferably, the surface of the PPS plastic base layer is plasma treated to form a concave-convex contact surface.

[0017] Preferably, a carbon fiber layer is further provided between the PPS plastic base layer and the graphene heat conductive layer.

[0018] Preferably, the layers are bonded together by thermal compression or magnetron sputtering to form an integrated structure.

[0019] Preferably, the overall thickness of the plastic is 2 to 10 mm.

[0020] Compared with the prior art, the beneficial effects of the present invention are: the present invention provides a high-temperature resistant thermally conductive plastic, which is applied to a cable protective sheath, comprising: a PPS plastic base layer; a graphene thermally conductive layer, which is arranged on the upper surface of the PPS plastic base layer; and a thermally conductive ceramic particle layer, which is arranged on the outer surface of the graphene thermally conductive layer; wherein the outer surface of the thermally conductive ceramic particle layer is provided with a plurality of alternatingly distributed protrusions and grooves, and the height h of the protrusion, the depth d of the groove and the total thickness H of the thermally conductive ceramic particle layer satisfy the relationship: 1 / 2H≤h≤2 / 3H, 1 / 2H≤d≤2 / 3H; the PPS plastic base layer is a porous structure, and the porosity of the PPS plastic base layer is 60-80%. Among them, PPS (polyphenylene sulfide) has excellent high-temperature resistance, which can ensure that the cable protective cover will not deform when used in a high-temperature environment; in addition, its porous structure achieves a porosity of 60-80%, which not only helps to improve the air permeability and heat dissipation performance of the plastic, but also helps to reduce weight and provide good mechanical strength; the graphene layer has a high thermal conductivity coefficient, which can quickly and effectively conduct the heat generated during cable operation, reduce the cable temperature, accelerate heat dissipation, and prevent overheating; in addition, the thermally conductive ceramic particle layer has excellent thermal conductivity and wear resistance, and the alternating protrusions and grooves on the surface of the thermally conductive ceramic particle layer (1 / 2H≤h≤2 / 3H, 1 / 2H≤d≤2 / 3H) not only increases the heat dissipation area, further improves the heat dissipation efficiency, but also enhances the strength and impact resistance of the plastic outer surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of the plastic of Example 1 of the present utility model;

[0022] Figure 2 This is a structural diagram of the plastic used in the cable protective cover of Example 1 of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of the plastic in Example 2 of the present invention.

[0024] In the figure: 1. PPS plastic matrix layer; 2. Graphene thermal conductive layer; 3. Thermal conductive ceramic particle layer; 31. Protrusions; 32. Grooves; 4. Carbon fiber layer. DETAILED DESCRIPTION

[0025] In order to make the technical solutions and advantages of the present invention clearer, the present invention and its beneficial effects will be described in further detail below in conjunction with specific implementation methods and the accompanying drawings, but the implementation methods of the present invention are not limited thereto.

[0026] Example 1

[0027] like Figures 1-2As shown, this embodiment provides a high-temperature resistant thermally conductive plastic, which is applied to a cable protective cover, including:

[0028] PPS plastic base layer 1;

[0029] The graphene heat-conducting layer 2 is disposed on the upper surface of the PPS plastic base layer 1;

[0030] The thermally conductive ceramic particle layer 3 is disposed on the outer surface of the graphene thermally conductive layer 2;

[0031] The outer surface of the thermally conductive ceramic particle layer 3 is provided with a plurality of alternately distributed protrusions 31 and grooves 32. The height h of the protrusions 31, the depth d of the grooves 32, and the total thickness H of the thermally conductive ceramic particle layer 3 satisfy the relationship: 1 / 2H≤h≤2 / 3H, 1 / 2H≤d≤2 / 3H;

[0032] The PPS plastic base layer 1 has a porous structure, and the porosity of the PPS plastic base layer 1 is 60-80%, more preferably 70%.

[0033] Among them, PPS (polyphenylene sulfide) has excellent high-temperature resistance, which can ensure that the cable protective sheath will not deform when used in a high-temperature environment; in addition, its porous structure achieves a porosity of 60-80%, which not only helps to improve the air permeability and heat dissipation performance of the plastic, but also helps to reduce weight and provide good mechanical strength; the graphene layer has a high thermal conductivity coefficient, which can quickly and effectively conduct the heat generated during cable operation, reduce the cable temperature, accelerate heat dissipation, and prevent overheating; in addition, the thermally conductive ceramic particle layer 3 has excellent thermal conductivity and wear resistance, and the alternating protrusions 31 and grooves 32 design (1 / 2H≤h≤2 / 3H, 1 / 2H≤d≤2 / 3H) on the surface of the thermally conductive ceramic particle layer 3 not only increases the heat dissipation area, further improves the heat dissipation efficiency, but also further enhances the strength and impact resistance of the plastic outer surface.

[0034] In this embodiment, the heat-resistant temperature of the plastic is ≥250°C.

[0035] In this embodiment, the thermal conductivity of the graphene heat-conducting layer 2 is 2000-2500 W / m·K.

[0036] In this embodiment, the thermally conductive ceramic particle layer 3 is a silicon carbide particle layer or a silicon nitride particle layer. The ceramic particles have excellent thermal conductivity and temperature resistance.

[0037] In this embodiment, the layers are bonded together to form an integrated structure by means of thermal compression bonding or magnetron sputtering, thereby ensuring close bonding between the layers and improving the stability and durability of the overall material.

[0038] In this embodiment, the overall thickness of the plastic is 2 to 10 mm; this can meet the needs of cable protection while not being too bulky and convenient for laying.

[0039] Example 2

[0040] like Figure 3 As shown, the difference from Example 1 is that a carbon fiber layer 4 is further provided between the PPS plastic matrix layer 1 and the graphene heat conductive layer 2. Carbon fiber has excellent mechanical properties, further improving the tensile strength and toughness of the plastic.

[0041] The other structures are the same as those in Example 1 and will not be described again here.

[0042] Example 3

[0043] Different from Example 1, the surface of the PPS plastic base layer 1 of this embodiment is plasma treated to form a concave and convex contact surface. While increasing the contact area, the concave and convex structure can also play the role of bite and lock, thereby greatly improving the bonding force between the layers and making the overall plastic structure more stable.

[0044] The other structures are the same as those in Example 1 and will not be described again here.

[0045] Based on the disclosure and teachings of the above description, those skilled in the art will be able to make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments described above. Any obvious improvements, substitutions, or modifications made by those skilled in the art based on the present invention fall within the scope of protection of the present invention. In addition, although certain specific terms are used in this description, these terms are for convenience only and do not constitute any limitation on the present invention.

Claims

1. A high temperature resistant thermal conductive plastic, used for cable protective cover, characterized in that: include: PPS plastic base layer; A graphene heat-conducting layer is provided on the upper surface of the PPS plastic base layer; a heat-conducting ceramic particle layer, disposed on the outer surface of the graphene heat-conducting layer; The outer surface of the thermally conductive ceramic particle layer is provided with a plurality of alternately distributed protrusions and grooves, and the height h of the protrusions, the depth d of the grooves and the total thickness H of the thermally conductive ceramic particle layer satisfy the relationship: 1 / 2H≤h≤2 / 3H, 1 / 2H≤d≤2 / 3H; The PPS plastic matrix layer is a porous structure, and the porosity of the PPS plastic matrix layer is 60-80%.

2. The high temperature resistant thermal conductive plastic according to claim 1, characterized in that: The heat-resistant temperature of the plastic is ≥250°C.

3. The high temperature resistant thermal conductive plastic according to claim 1, characterized in that: The thermal conductivity of the graphene heat-conducting layer is 2000-2500 W / m·K.

4. The high temperature resistant thermal conductive plastic according to claim 1, characterized in that: The thermally conductive ceramic particle layer is a silicon carbide particle layer or a silicon nitride particle layer.

5. The high temperature resistant thermal conductive plastic according to claim 1, characterized in that: The surface of the PPS plastic base layer is plasma treated to form a concave-convex contact surface.

6. The high temperature resistant thermal conductive plastic according to claim 1, characterized in that: A carbon fiber layer is further provided between the PPS plastic matrix layer and the graphene heat conducting layer.

7. The high temperature resistant thermal conductive plastic according to claim 1, characterized in that: The layers are bonded together by thermal compression or magnetron sputtering to form an integrated structure.

8. The high temperature resistant thermal conductive plastic according to claim 1, characterized in that: The overall thickness of the plastic is 2 to 10 mm.

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