Here's a breakdown of the construction:
* Outer Shell: Made of a durable material like steel, aluminum, or plastic.
* Inner Structure: This is the "meat" of the bumper, made of the above-mentioned polypropylene or polyurethane. It's designed to absorb impact and crumple in a controlled way during a collision, protecting passengers and the vehicle's frame.
* Reinforcements: Often made of steel or aluminum, these add strength and stability to the bumper structure.
Let me know if you'd like more information about the specifics of car bumper construction!
