ailong PLA film substrate selection is renewable corn starch and other raw materials made of bio-based plastics. Compared with traditional petroleum-based plastics,PLA film has a number of advantages: 1. High transparency and gloss. Cailong PLA film has high transparency, which can clearly show the appearance of the product and improve the sensory quality of the product. At the same time, its gloss is also excellent. 2. Good mechanical properties. Cailong PLA film has excellent tear resistance and can effectively protect products from damage. 3. Excellent heat sealing and printing performance. Cailong PLA film can be easily adapted to various packaging and printing processes to meet different application needs. 4. Environmentally friendly and degradable. Cailong PLA film meets the biodegradation requirements of international standards and can be completely decomposed under appropriate conditions without causing pollution to the environment. With these excellent properties, Cailong PLA film and PLA aluminized film have been widely used in various packaging fields: (1) Food composite bag making. Cailong PLA film and PLA aluminized film can be used for the composite of film materials such as food packaging bags and pharmaceutical packaging, which can not only protect products, but also provide excellent heat sealing performance and printing performance. (2) Paper-plastic composite bag. Cailong PLA film or PLA aluminized film and kraft paper and other environmental protection materials composite, can be used for coffee beans, dried meat and other products packaging. This will greatly improve the appearance of the product, as well as the barrier performance, extend the freshness of the contents, preservation shelf life. As a renewable and degradable bio-based plastic,PLA film and PLA aluminized film are not only superior to traditional plastics in performance, but also have significant advantages in environmental protection. Compared to petroleum-based plastics,PLA films have significantly lower carbon emissions during the production process, helping to reduce the carbon footprint of the final product. In addition, due to the support of advanced aluminum plating process, the barrier performance of Cailong PLA aluminum plating film is very obvious, which provides a new solution for environmental protection concepts such as reducing the number of composite layers and lightweight packaging In addition,PLA film and PLA aluminized film will not release toxic substances during the decomposition process, and there is no harm to the environment and human health. This makes it a truly environmentally friendly plastic packaging substrate.