In the production of disposable paper cups, the base paper of paper cups is generally used. The so-called paper cup base paper needs more waterproof treatment than ordinary paper, because it is in direct contact with the oral cavity and needs to meet food-grade standards. In order to achieve whiteness, fluorescent brighteners are often added to ordinary paper, and fluorescent brighteners are carcinogens. Therefore, ordinary fluorescent brighteners cannot be added to the base paper of paper cups, and only food-grade brighteners can be added. In addition, after the base paper is produced, it needs to be coated with PE (that is, a layer of plastic-like things is coated on the surface of the paper). The purpose of PE coating is to prevent water leakage, and it is also used as an adhesive \ x0d \ x0d \ paper cup \ x0d \ x0d \ to mechanically bond the base paper (white cardboard) made of wood pulp. \x0d\ Paper cups for frozen food are waxed, which can hold ice cream, jam and butter. \x0d\ Paper cups used to hold hot drinks are coated with plastic, which can withstand high temperatures above 90℃ and can hold boiled water. \x0d\ Paper cups are characterized by safety, hygiene, portability and convenience. \x0d\ public * * * places, restaurants, restaurants can be used, and it is a disposable product. \x0d\ Paper cups are divided into single-sided PE coated paper cups and double-sided PE coated paper cups \x0d\ Single-sided PE coated paper cups: Paper cups made of single-sided PE coated paper are called single-sided PE paper cups (common market paper cups in China, most advertising paper cups are single-sided PE coated paper cups), and their manifestations are as follows: the side of the paper cup containing water is covered with a smooth PE film; \x0d\ Double-sided PE coated paper cups: Paper cups made of double-sided PE coated paper are called double-sided PE paper cups, which are characterized by PE coated inside and outside the paper cups. \x0d\ paper cup size: We use ounces (OZ) to measure the size of paper cups. For example, 9-ounce, 6.5-ounce and 7-ounce paper cups commonly used in the market. \x0d\ OZ(。 Here stands for: 1 oz is equivalent to the weight of 28.34 ml of water. \x0d\ can be expressed as: 1 OZ)=28.34 ml)=28.34 g \ x0d \ paper cups: in China, we put 3-65433.