Polypropylene: Polypropylene is another type of plastic that is used in car bumpers. It is stronger than polyurethane and more resistant to heat and chemicals. However, it is also less flexible, making it more likely to crack or break in a collision.
Steel: Steel is a strong and durable material that is often used in car bumpers. However, it is also heavy and can rust, making it less desirable for use in modern cars.
Aluminum: Aluminum is a lightweight and strong material that is increasingly being used in car bumpers. It is resistant to corrosion and does not rust, making it ideal for use in harsh weather conditions.
Fiberglass: Fiberglass is a lightweight and flexible material that is often used in custom car bumpers. It is strong and durable, but it can also be expensive and difficult to work with.
Rubber: Rubber is a flexible and impact-resistant material that is often used in car bumpers. It is not as strong as some of the other materials used in bumpers, but it is inexpensive and easy to work with.
In addition to these materials, car bumpers may also contain other components, such as foam, plastic, and metal reinforcements. The specific materials used in a car bumper will depend on the make and model of the car, as well as the desired performance characteristics.