Paper corner protectors are usually designed to protect the corners of paper materials such as paper or cardboard from damage. They are usually made of cardboard or paper material and thus provide some degree of corner protection.
However, paper corners are not a particularly bend-resistant material. They are primarily designed to protect the corners of paper or cardboard, not to withstand heavy stress or bending. Paper corner guards may warp or crack if they are bent or a lot of force is applied.
If you need to fold or bend paper or cardboard and would like better fold resistance, you may want to consider other types of corner protection such as plastic or metal corner protection, which are generally more durable than paper corner protection , and can better withstand pressure and bending.