Why Are Tires Black?


This question has a straightforward answer. There is soot on the tires, and soot is supposed to be black. A more relevant question is, “Why do tires have soot in them?” Approximately one-third of the weight of a tire is soot that is incorporated into the rubber. The explanation here is both straightforward and obvious: soot significantly increases the lifespan of a tire. Rubbers are employed in the manufacturing of tire rubber (which has a yellow to brownish color on the edge). Rubber-only tires would have a service life of just 10% of the standard manufacturing tire’s current mileage.

What is soot?

Soot is made from tiny carbon particles that are made when fossil fuels aren’t completely burned (wood, oil, coal, and more). Soot is made up of acids, chemicals, metals, soil, and dust, as well as all of these other things. This leaves a bad look and smell.

When there is a fire, soot spreads through the house and holds things together. Because soot is acidic, it can do even more harm to your home and indoor air quality if it isn’t cleaned up right away.

Even without a fire, soot may infiltrate your house. Candles can cause soot accumulation if used excessively (and are a fire danger). Insufficiently ventilated chimneys can also emit soot. Furnaces that emit a back murmur are also polluted with soot.

What Does Soot Do to Tire Rubber?

The tire rubber is made of soot. As the surface area grows, the forces that hold the soot particles to the rubber macromolecules also grow. The more the filler is stuck to the rubber, the stronger the tire is. As a result, soot makes the tire more stiff and hard when it’s on the road, as well as more resistant to erosion. There are a lot of tires for Formula 1 cars, planes, and earthmoving machines that show how important it is to choose the right carbon black and use the right rubber. However, the tread isn’t the whole tire. It must stay on the rim even when the road is very rough, the tread can’t come off, and the tire sidewall can’t break even when it’s under a lot of pressure. Specially made carbon blacks are also to blame for making these things better. There may be up to 12 different types of soot in a single tire. Filler and tire producers spend a lot of time and money on research and development. This area of work is very interesting. Even the scientists say they don’t know how the soot does all this.

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