Toilet paper is mainly used for people's daily hygiene and is one of the indispensable paper types for the people. In order to make toilet paper soft, mechanical methods are usually used to wrinkle the paper and increase its softness. There are many raw materials for manufacturing toilet paper, including natural and pollution-free materials such as cotton pulp, wood pulp, bamboo pulp, and straw pulp. The habit of using toilet paper after going to the bathroom originated in China, dating back to the Tang Dynasty. At that time, the materials of toilet paper were varied, and even nobles and nobles used rice paper or silk to make toilet paper, but without exception, they were all in sheets. Modern wrinkled toilet paper was born in the United States.