Why is epoxy glass fiber rod so hard

The hardness of epoxy glass fiber rod is almost the same as that of carbon steel, because of this, it can sell well in the aerospace accessories market. It can be seen in all products that need to reduce their own weight. For example, some new cars are now on the market. It will be mentioned that they are now on the market. Lightweight design is adopted. The car is faster and more fuel-efficient. The shadow of glass fiber is not lost, and glass fiber is also the main raw material of epoxy glass fiber rod. That’s why it can be so hard.