PLA coated paper (biodegradable coated paper) itself is a completely decomposable and compostable environmental protection product. Polylactic acid (PLA) is a new biodegradable environmental protection material, which is made of starch raw materials proposed by renewable plant resources (such as corn). Glucose is obtained from starch raw material through saccharification, and then high-purity lactic acid is produced by fermentation of glucose and certain bacteria, and then polylactic acid with certain molecular weight is synthesized by chemical synthesis method. It has biodegradable and compostable thermoplastic materials, which take plants as the main raw material source; After extraction, fermentation and polymerization, 100% fully biodegradable materials can be completely degraded by microorganisms in nature into carbon dioxide and water required for plant growth in a composting environment. It has good biodegradability and does not pollute the environment, which is very beneficial to environmental protection. It is a common environmental protection material abroad. Compared with traditional PE coated paper products, PLA coated paper products can be recycled after use. The special and diversified recycling treatment methods of renewable resources greatly reduce the burden of natural resources and environment, which is in line with the endless green cycle criterion.

PLA Paper Cup is the emergence of new technology and new process, which makes the manufacturing technology of paper cup improve continuously. New paper cups will appear and play a greater role in promoting and promoting the design and variety of products. The surface of hot drink paper cup shall be treated with wax spraying or wax dipping. Because cold drinks will cause water on the surface of the paper cup, leading to the softening of the paper cup. It can be waterproof after being coated with wax. The wax is very stable and safe at 0 ~ 5 ℃.

To enhance the heat insulation effect and compressive strength of the PLA paper cup, the heat insulation ability of the outer cup body must be enhanced. As long as the surface paper does not show corrugated marks after laminating, the paper with lower gram weight can be used as far as possible; Core paper and PLA paper cup are good. Straw pulp or wood pulp paper with good stiffness and high ring compression strength shall be used. Pulp is processed with some plants as raw materials. It is the basic raw material of papermaking. The plants usually used as pulping raw materials can be divided into four categories: stem fiber, phloem fiber, seed wool fiber and wood fiber. Among them, wood fiber is particularly important.