What is the difference between single-layer paper cups and double-layer paper cups?

Single layer paper cup is a type of disposable paper cup, also known as single-sided coated paper cup. It is the layer inside the paper cup that has a smooth PE coating. Single layer cups are generally used to hold drinking water, making it convenient for people to drink. Single layer paper cups are made from food grade wood pulp paper and food grade PE film. Double layered paper cups, as the name suggests, refer to paper cups that are double layered, with two layers. The quality of double-layer paper cups is better than single-layer paper cups. The usage time of double-layer paper cups is also longer than that of single-layer paper cups. It can also be used to hold hot drinks, such as hot coffee.

In order to expand the application scope of paper cups, in 1940, straight walled double-layer paper cups were introduced to the market. These paper cups are not only easy to carry, but also can hold hot drinks. Afterwards, the manufacturer coated latex on these paper cups to cover the paper cup smell and enhance the leak resistance of the paper cups. The single-layer wax coated cups treated with latex coating are widely used to hold hot coffee. A double-layer paper cup, comprising a base and a double-layer paper cup body composed of an inner layer of paper cup body and an outer layer of paper cup body. The inner or outer surface of each layer of paper cup body is provided with uneven reinforcement ribs, and the surface composed of the uneven reinforcement ribs is concave and convex. The inner layer of paper cup body and the outer layer of paper cup body are sealed and adhered to each other.