The sponge we usually talk about is actually a kind of "artificial sponge", which is synthesized with industrial products, and some kinds are synthesized with melamine that we are familiar with. If we use this sponge to wash dishes, its harm to our health is self-evident.
Chemical sponge
Polyurethane soft foam rubber, polyurethane is the most common polymer material in life, which is widely used to make various "sponge" products. And elastic materials for shock absorption and friction resistance, such as soles and tractor tank track bases.
Recycled cotton is made from waste cotton, industrial waste and cloth ends and yarn ends of textile enterprises. In particular, the raw materials may also contain medical waste cotton. Therefore, recycled cotton will do harm to human health, and it is easy to cause pollution when it is put together with civilian cotton.