Why are most car bumpers made of plastic? Instead of aluminum or iron?


Bumpers are familiar to most people. As one of the external parts of the car, it not only has a certain decorative effect on the appearance of the car, but more importantly, it has the important task of absorbing and softening the external impact, protecting the body and ensuring the safety of the car. tenants. We usually think that such a protective device should be made of metal in order to be more durable, but today, plastic bumpers are used in the automotive market, why?

That's right, as we think every day, many years ago, the front and rear bumpers of cars were indeed mostly made of metal materials. So what caused the change today? It turns out that with the development of the automotive industry, people gradually moved from satisfaction with only guarantees of quality and safety to certain requirements for the aesthetics of cars. After a special welding process, the former metal bumper always makes people feel like an extra piece that is difficult to integrate into the overall shape of the car, so car manufacturers are phasing it out and replacing it with plastic.

So how did this type of bumper, which seems less pressure resistant, make people feel safe using it and finally be passed down from generation to generation? The plastics used in this plastic bumper are usually made from injection molded polyester and polypropylene. Some well-known foreign car brands even use polycarbonate-based plastics, infiltrate alloy components, and use alloy injection molding to make bumpers. This type of bumper not only has high hardness, but also has the advantage of being easy to weld and has good coating performance. Thus, the bumper finally harmonizes with the car. In addition, the plastic bumper has a small mass, which makes the car as a whole lighter.

In addition to the need for appearance, the plastic bumper is still relatively strong for protecting pedestrians. Since it has a certain degree of elasticity, pedestrians will not be too badly injured if they accidentally bump into a vehicle. What's more, ordinary small scratches made of plastic materials can be automatically bounced off and repaired, even if they are hit by other vehicles, they will not pay a large compensation price. In addition, plastic parts are inexpensive and easy to manufacture, which is very convenient for automakers. Plastic does not have the hidden danger of corrosion like metal and is very easy to disassemble and reassemble.

Probably, according to the above description, everyone finally understood the reason for changing the bumper material. It seems that automakers have really thought a lot to balance the interests of themselves and consumers, it is thanks to their good intentions that car enthusiasts can enjoy a better car service. Finally, I believe that in the near future, more innovative ideas that meet the needs of people will become a reality over time and will contribute to the rapid development of the automotive industry.