Plastic parts can be used in various fields, especially the automobile industry. Nowadays, many metal parts of automobiles, such as fuel tanks, bumper shells, fenders, and tire valve caps, have been replaced with automobile plastic parts.

1. Car bumper shell

The bumper shell is usually made of polypropylene PP, which is relatively light and has better corrosion resistance. The bumper shell is different from the bumper. It does not mean that there is only one shell outside, but it is actually composed of several parts.

The shell on the outside of the bumper has cushioning material inside, and the anti-collision beam inside, which is collectively called the bumper. The bumper shell only serves as a buffer.

The anti-collision beam is a structural component that protects the passengers in our car and reduces injuries when the impact force is relatively large. It uses high-strength metal materials such as steel pipes and aluminum alloys.

But the shell of the bumper only serves as a buffer against the impacting object, and its strength is relatively low. Its designed impact strength is basically 0.3 joules per square centimeter. What is the concept of this? I said bullets. When a bullet is shot out, the impact of this bullet is about 1.8 joules per square centimeter, which is about this way, six times the difference.