At present, automobile tires are made of natural rubber and styrene butadiene rubber, filled with an appropriate amount of carbon black and processed with the combination of vulcanizing agents, accelerators, and softeners. The automobile tires are in direct contact with various grounds and withstand the weight of automobiles. , to ease the various impacts encountered during the driving process, so the car tires are required to have good wear resistance, low temperature flexibility, puncture resistance, etc., especially tire tread rubber. Many tire manufacturers now mix appropriate amounts of tire rubber powder in traditional tread rubber formulas to reduce tire costs while improving the production process and mechanical properties of automotive tires.
According to the performance requirements of automobile tires and the physical characteristics of tire rubber powders, there are mainly four advantages in using tire rubber powders in rubber tire tread rubbers:
1. The use of tire reclaimed rubber in rubber products is a way for many rubber manufacturers to reduce costs. Compared with tire reclaimed rubber, tire rubber powder has higher moisture content, ash content, fiber content, and heat reduction than tire regenerating. The glue has to be low, so the first advantage of using tire rubber powder in the tread rubber is that it has little effect on the overall performance of the tread rubber.
2, tire rubber powder in rubber products can be used as a filler, can consume a small amount of curing agent, participate in the cross-linking reaction in the vulcanization process, thereby delaying the vulcanized rubber vulcanized rubber compound speed, reduce the incidence of scorch;
3, tire rubber powder retains most of the original performance of automotive tires, as the non-desulfurization and no plasticity of the elastic body will produce a hysteresis effect under dynamic conditions, can ease the dynamic heat of the tread rubber;
4, compared with tire reclaimed rubber, tire rubber powder processing technology is more simple, lower cost, and the difference between the price of natural rubber, styrene-butadiene rubber more, so the amount of tire rubber powder used in the tread rubber in improving the tread Under the premise of gum performance and process, part of raw material costs can be reduced.
Tread reclaimed rubber mixed with appropriate amount of tire rubber powder can improve the rubber processing technology and reduce the tread rubber production cost, but the choice and amount of rubber powder is also very important, an inadvertently affect the tread rubber performance and life: Select More than 80 mesh tire rubber powder, easy to mix with rubber and other additives; Appropriate increase in the amount of curing agent, because the tire rubber powder in the mixing and vulcanizing agent cross-linking reaction and consumption of curing agent; tire rubber powder used too much It will affect the physical and mechanical properties of the tread rubber, so it is best to control the amount of tire rubber powder between 5-10 parts. In short, tire rubber powder should be used under the precondition that the tread rubber index is qualified, and do not make any impact on the quality of the tread rubber in order to reduce the cost.
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