With the development of industry and technology, some fields have very high requirements for the thermal conductivity of extruded plastic pipe profiles in materials, such as heat exchange engineering, electromagnetic shielding, electronic information, etc., and higher requirements for thermally conductive plastic materials. Hope The material has excellent comprehensive properties.
In the field of electrical and electronics, with the rapid development of integration technology and assembly technology, the volume of electronic components and logic circuits has shrunk thousands of times, and there is an urgent need for high heat dissipation packaging insulating plastics. Therefore, traditional thermal conductive materials are limited and cannot meet the development of industry and technology. Demand, thermally conductive plastics are getting more and more attention due to their excellent comprehensive performance, and their application fields are continuously expanding. The development prospects of thermally conductive plastics are quite optimistic.
Filling materials and molding processes have a great influence on the thermal conductivity of plastics. Therefore, improving the thermal conductivity of thermally conductive plastics can start from the following aspects: first, develop new thermally conductive fillers; second, modify the surface of filler particles.
From the definition, the particle size in the composite polymer material can be considered as not affecting the thermal conductivity. In fact, when the particle size is a few micrometers or more, the thermal conductivity is not affected by the particle diameter. However, the particle diameter in the powder field, that is, when the particle diameter is below a few micrometers, the thermal conductivity increases as the particle diameter becomes smaller. Extrusion of plastic pipes is due to the change of the particle dispersion state, which is prone to secondary agglomeration to form a continuum of particles, which increases the thermal conductivity. In other words, this effect affects the thermal conductivity due to different dispersion states.
