Most car bumpers are made of plastic, and some old cars may be made of metal. Many years ago, the front and rear bumpers of automobiles were mainly made of metal materials. They were stamped into U-shaped channel steel with a thickness of more than 3 mm, and the surface was chrome-plated. The large gap, as if it was an attached part, looked very unsightly.
With the development of the automobile industry and the large-scale application of engineering plastics in the automobile industry, automobile bumpers, as an important safety device, are also on the road of innovation. At present, in addition to maintaining the original protection function of the front and rear bumpers of the car, it is also necessary to pursue the harmony and unity with the body shape, and pursue its own lightweight. The front and rear bumpers of the sedan are made of plastic, which are called plastic bumpers.