Acetal

Acetal is a type of plastic that is often used to make things like bicycle helmets, toys, and car parts. It's made by mixing two different kinds of chemicals together, just like when you mix different colors of paint.

When these chemicals mix, they create a soft and sticky substance that can be molded into different shapes. Once the acetal is shaped into the desired form, it is heated up until it hardens and becomes solid.

Acetal is really strong and durable, which means it can withstand a lot of wear and tear without breaking or wearing down. It also doesn't melt easily, which makes it a good choice for things that need to hold up to high temperatures.

But even though it's tough, acetal is still a type of plastic, which means it can be harmful to the environment if not disposed of properly. That's why it's important to always recycle and dispose of plastics correctly.