Paper corner protectors, also known as edge protectors, are widely used in industrial applications for providing protection to the edges and corners of a variety of products during shipping and handling processes. These paper-based products are typically made by laminating a multi-layered paperboard that is then die-cut into a specific shape to fit the product's corner. 

The paperboard used in making corner protectors is predominantly made from recycled materials and is biodegradable, making it an eco-friendly solution for packaging products. The thickness of the paperboard can vary depending on the level of protection required for the product. 

In addition, paper corner protectors can be customized to fit a wide range of products and can be printed with company logos or handling instructions. The product can also be produced in various colors to help identify and differentiate between different products. 

Overall, paper corner protectors offer a cost-effective and sustainable solution for protecting products during transit and storage, making them an essential component in many industries, including electronics, automotive, and pharmaceutical.