Shoulder wedge composite material and manufacturing method thereof

Abstract

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.

Description

technical field [0001] The invention belongs to rubber composite materials, in particular to a shoulder pad rubber for improving the durability of a load-bearing radial tire and a preparation method thereof. Background technique [0002] In recent years, automobiles have become more and more popular and high-speed. Due to the viscoelastic properties of rubber, tires generate a lot of heat under periodic loads, and rubber is a poor conductor of heat, so it is difficult to discharge heat in time. Due to heat accumulation, the temperature inside the tire will increase, which will cause the shoulder void phenomenon in the thicker part of the tire, which will affect the durability and service life of the tire. The shoulder pad rubber connects the tread, the carcass layer and the second belt layer in the shoulder part, and plays a vital role in the heat dissipation of the shoulder part. How to prepare shoulder pad rubber with low heat generation and high thermal conductivity has ...

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Problems solved by technology

Wang Zhenhua and others proposed to add a large number of parts (above 100 parts) of nano-alumina thermally conductive fillers to improve the thermal conductivity of rubber composites (rubber nano-reinforcement mechanism and research on the preparation, structure and performance of new enhanced thermally conductive rubber composites. Doctoral dissertation ), but due to the excessive amount of filler, it will lead to high cost and difficult processing

When Wu Ning and others used CNTs to prepare rubber composites, they found that when adding less CNTs, the improvement of thermal conductivity was limited, and when too many CNTs were added, the dynamic loss factor of rubber composites increased, and the dynamic heat generation of rubber composites changed. Large (Study on Improving the Performance of Tire Shoulder Cushion Filled with Carbon Nanotubes. Master's Thesis), which is not conducive to the practical application in dynamic situations

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