The invention discloses a shoulder wedge
composite material and a manufacturing method thereof. The shoulder wedge
composite material consists of the following raw materials in part by weight: 100 parts of
natural rubber, 10 to 50 parts of carbon series nano thermal conducting filler, 10 to 35 parts of
coarse particle size
carbon black, 2 to 6 parts of octyl phenolic resin, 2 to 4 parts of surfactant, 1 to 8 parts of
silane coupling agent, 1.5 to 9 parts of vulcanizing agent and the balance of other common aids. The preparation method comprises the following steps of: plasticating the rubber in an internal mixer, adding the
coarse particle size
carbon black, the carbon series nano thermal conducting filler, the octyl phenolic resin, the surfactant and the other aids into the internal mixer, mixing and controlling the temperature to be between 80 and 120 DEG C; adding the
silane coupling agent into the mixture, controlling the temperature to be between 120 and 160 DEG C, and discharging the
sizing material; adding a master batch and the vulcanizing agent into the internal mixer and discharging products until the temperature is 80 to 120 DEG C, wherein if the other aids contain scorch
retarder, the scorch
retarder and the vulcanizing agent are added together. The shoulder wedge
composite material provided by the invention meets the requirements of mechanical properties, and is low in themogenesis, high in
thermal conductivity, and excellent in
machinability.