US-12617994-B2 - Heat-dissipating plastic

Abstract

A heat-dissipating plastic is provided. The heat-dissipating plastic according to an exemplary embodiment of the present invention is implemented by including a polymer matrix formed by including a main resin; and a carbon-based filler which is provided by being dispersed in the polymer matrix, and includes a fibrous carbon-based filler and a granular carbon-based filler. According to the above, the heat-dissipating plastic has remarkably excellent heat dissipation characteristics due to the remarkably excellent thermal conductivity, and it has an effect that the mechanical strength is remarkably excellent even though it is designed to have remarkably excellent heat dissipation characteristics. Accordingly, the implemented heat-dissipating plastic can be widely applied in various technical fields where excellent heat-dissipating performance and mechanical strength are required at the same time.

Inventors

• Jin Hyoung LEE

Assignees

• AMOGREENTECH CO., LTD.

Dates

Publication Date

20260505

Application Date

20200821

Priority Date

20190821

Claims (2)

1. 1 . A heat-dissipating plastic, comprising: a polymer matrix comprising a main resin; and a carbon-based filler which is dispersed in the polymer matrix, and comprises a fibrous carbon-based filler and a granular carbon-based filler, wherein the fibrous carbon-based filler is an anisotropic pitch-based carbon fiber, and the carbon-based filler comprises the fibrous carbon-based filler and the granular carbon-based filler at a weight ratio of 1:1 to 5, wherein the heat-dissipating plastic comprises 20 to 60 parts by weight parts by weight of the carbon-based filler based on 100 parts by weight of the main resin, wherein the anisotropic pitch-based carbon fiber has an average fiber diameter of 6 to 18 μm and an average fiber length of 5 to 10 mm, wherein the granular carbon-based filler has an average particle diameter of 10 to 300 μm, wherein an average fiber diameter of the anisotropic pitch-based carbon fiber and an average particle diameter of the granular carbon-based filler have a diameter ratio of 1:0.5 to 60, and wherein the granular carbon-based filler comprises a graphite composite, the graphite composite comprises graphite, nanoparticles bonded to a surface of the graphite and a catecholamine layer, and the nanoparticles are Cu, Ni or Si.
2. 2 . The heat-dissipating plastic of claim 1 , wherein the main resin comprises one compound or a mixture or copolymer of two or more selected from the group consisting of polyamide, polyester, polyketone, liquid crystal polymer, polyolefin, polyphenylene sulfide (PPS), polyether ether ketone (PEEK), polyphenylene oxide (PPO), polyether sulfone (PES), polyether imide (PEI), polyimide (PI), polyphthalamide (PPA), polybutylene terephthalate (PBT), acrylonitrile butadiene styrene copolymer resin (ABS), polymethyl methacrylate (PMMA) and polyarylate (PAR).

Description

CROSS-REFERENCE TO RELATED APPLICATION(S) This application is a National Phase Entry Application of PCT Application No. PCT/KR2020/011172 filed on Aug. 21, 2020, which claims priority to Korean Patent Application No. 10-2019-0102091 filed on Aug. 21, 2019 in Korean Intellectual Property Office, the entire contents of which is hereby incorporated by reference in its entirety. TECHNICAL FIELD The present invention relates to a heat-dissipating plastic. BACKGROUND ART Heat build-up in electronic components, lights, converter housings and other devices that generate unwanted heat can significantly limit the product lifespan and reduce the operational efficiency. In particular, as electronic devices become highly integrated as they become light, thin, compact and multifunctional, heat generation increases, and countermeasures therefore required. Dissipating heat is generated in electronic devices is very important because it is closely associated with the reliability and lifespan of devices. Conventionally, various heat dissipation devices such as heat dissipation fans, heat dissipation fins, heat pipes and the like have been developed, and recently, various heat-dissipating materials such as heat-dissipating pads, heat-dissipating sheets, heat-dissipating paints and the like have been developed to assist or replace heat-dissipating devices. Metal, which is an excellent heat conductor, has been commonly used for heat management devices such as heat sinks and heat exchangers, but the metal part has problems in that the weight is heavy and the production cost is high. In addition, in the case of a conventional heat dissipation mechanism, excellent heat dissipation characteristics could not be expressed due to poor thermal conductivity, and in order to improve the thermal conductivity, there is an inevitable problem such as a decrease in mechanical strength, cracking and the like. Accordingly, the situation is that there is an urgent need to develop a heat-dissipating material which is capable of expressing excellent heat dissipation characteristics as it has excellent mechanical strength, minimizes cracking and has remarkably excellent thermal conductivity. DISCLOSURE Technical Problem The present invention has been devised in view of the above points, and it is an object of the present invention to provide a heat-dissipating plastic having remarkably excellent heat dissipation characteristics according to remarkably excellent thermal conductivity. In addition, it is an object of the present invention to provide a heat-dissipating plastic having remarkably excellent mechanical strength even though it is designed to have remarkably excellent heat dissipation characteristics. Technical Solution In order to solve the above problems, the present invention provides a heat-dissipating plastic, including a polymer matrix formed by including a main resin; and a carbon-based filler which is provided by being dispersed in the polymer matrix, and includes a fibrous carbon-based filler and a granular carbon-based filler. According to an exemplary embodiment of the present invention, the fibrous carbon-based filler may include a pitch-based carbon fiber including at least one selected from the group consisting of an isotropic pitch-based carbon fiber and an anisotropic pitch-based carbon fiber. In addition, the fibrous carbon-based filler may be an anisotropic pitch-based carbon fiber. In addition, the fibrous carbon-based filler may have an average fiber diameter of 5 to 20 μm. In addition, the fibrous carbon-based filler may have an average fiber length of 3 to 12 mm. In addition, the granular carbon-based filler may include at least one selected from the group consisting of graphite, graphene, fullerene and carbon black. In addition, the granular carbon-based filler may have an average particle diameter of 5 to 350 μm. In addition, the carbon-based filler may include the fibrous carbon-based filler and the granular carbon-based filler at a weight ratio of 1:0.5 to 7. In addition, the heat-dissipating plastic may include 10 to 80 parts by weight of the carbon-based filler based on 100 parts by weight of the main resin. In addition, the average fiber diameter (μm) of the fibrous carbon-based filler and the average particle diameter (μm) of the granular carbon-based filler may have a length ratio of 1:0.2 to 80. In addition, the main resin may include one compound or a mixture or copolymer of two or more selected from the group consisting of polyamide, polyester, polyketone, liquid crystal polymer, polyolefin, polyphenylene sulfide (PPS), polyether ether ketone (PEEK), polyphenylene oxide (PPO), polyether sulfone (PES), polyether imide (PEI), polyimide (PI), polyphthalamide (PPA), polybutylene terephthalate (PBT), acrylonitrile butadiene styrene copolymer resin (ABS), polymethyl methacrylate (PMMA) and polyarylate (PAR). Meanwhile, throughout the specification, when the axis passing through two points is defined as a major axi