Thermal-conductive composite particle

Abstract

The invention relates to a thermal-conductive composite particle which contains polymer and continuous carbon fiber. The preparation method comprises the following steps: after polymer is mixed and before polymer is cooled, polymer is used to cover continuous carbon fiber to ensure that polymer and continuous carbon fiber are used to form a continuous composite after pulling and cooling, and then the composite is cut according to a proper length to form the composite particle. The length of the continuous carbon fiber in the composite particle is equal to that of the composite particle, thus the required length of the continuous carbon fiber can be obtained by controlling the cutting length of the composite, and after the composite particle is used to form the body, the body can have continuous carbon fiber with enough length and a three-dimensional net structure can be formed in the body.

Description

technical field [0001] A heat-conducting composite particle, especially continuous carbon fiber with sufficient length in the composite particle, so that the continuous carbon fiber can form a three-dimensional interlaced network structure in the body after the composite particle is made into the body, thereby effectively improving the body's thermal conductivity. Heat conduction efficiency, and at the same time improve the mechanical properties of the body. Background technique [0002] The thermal conductivity of metal is better than that of plastic, but due to the application requirements of the product and the limitations of the application site, the thermal conductivity of metal cannot be fully utilized. In this case, plastics with thermal conductivity can provide the best combination of cost, performance and ease of processing. good balance. Generally speaking, thermally conductive plastics contain thermally conductive fillers, which allow them to absorb heat energy a...

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Problems solved by technology

[0003] However, most of the current technologies improve the thermal conductivity of plastics by adding materials with high thermal conductivity such as ceramic powder, graphite, metal powder, carbon fiber, or carbon nanotubes to plastics, but both ceramic powder and carbon powder are in granular form. If only a small amount of powder with thermal conductivity is added to the composite material, it is not easy to form a continuous structure, and it is difficult to increase the thermal conductivity of the plastic. If a large amount of powder with thermal conductivity is added, it will affect the physical properties of the composite material; and then Or, if carbon fibers are added to the plastic, the carbon fibers will be destroyed during the mixing process when the plastic particles are prepared, so that after the plastic particles form the body through the injection process, the carbon fibers cannot be effectively interlaced to form a three-dimensional network, and it is also difficult to Increased thermal conductivity to plastics

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