Car rear bumpers are generally made of plastic material. This material is usually polypropylene plastic, which is lightweight and easy to manufacture.

　　In addition to the protective function, the front and rear bumpers of the car also need to be harmonious and unified with the body shape and pursue lightweight. Polypropylene plastic has the advantages of being easy to manufacture and matching well with the car body, making the car more beautiful in appearance. In addition, polypropylene plastic can also reduce vehicle weight, reduce fuel consumption, and have relatively low manufacturing costs, which can reduce the cost of the entire vehicle.

　　It should be noted that bumpers and anti-collision beams are different. Generally speaking, cars will have front and rear anti-collision beams, and some low-end models may only have front anti-collision beams. Anti-collision beams are usually made of pressed boron steel plates and are located behind the bumper. The bumper made of soft plastic mainly protects pedestrians, while the anti-collision beam made of steel is used to protect the water tank and engine.

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