PLA coated paper is made of biodegradable PLA particles, which are extruded and coated on the paper surface to make biodegradable PLA paper with high stiffness and high barrier properties. The PLA-coated paper cups used for drinking can also withstand temperatures above 90°C, and can even bloom with water, so the packaging cups made of PLA-coated paper can hold instant noodles or hot coffee and milk tea without pressure, and PLA is in the production process. No pollution, its products can also be biodegraded, and can be completely degraded by microorganisms in nature under specific conditions after use, so the packaging of this material truly meets the requirements of degradability and easy classification   PLA is a new type of bio-based and recyclable biodegradable material. It is made from starch raw materials proposed by renewable plant resources (such as corn, cassava, etc.). It has good biodegradability and can be used by nature. Microorganisms are completely degraded under specific conditions, and finally generate carbon dioxide and water, without polluting the environment, which is very beneficial to the protection of the environment and is recognized as an environmentally friendly material.   PLA is a new type of bio-based and renewable biodegradable material. It is made from starch raw materials proposed by renewable plant resources (such as corn, cassava, etc.). It has good biodegradability and can be used by nature. Microorganisms are completely degraded under specific conditions, and finally generate carbon dioxide and water, without polluting the environment, which is very beneficial to the protection of the environment and is recognized as an environmentally friendly material. And polylactic acid has good thermal stability, the processing temperature is 170 ~ 230 ° C, the products made of polylactic acid are not only biodegradable, but also have good biocompatibility, gloss, transparency, hand feel and heat resistance. It has certain bacteria resistance, flame retardancy and UV resistance. The PLA coating on the inner side wall of the paper cup can not only block water for the paper cup, but also facilitate biodegradation, so that the paper cup after PLA coating is completely degradable. , to facilitate vigorous promotion.