In people’s daily lives, packaging materials can be seen everywhere, and packaging materials used in food are given more missions. It needs to protect food from external pollution and isolate the air. Anti-aging, delay the deterioration time and facilitate storage. There are many kinds of packaging films used for food packaging, such as nylon film, heat shrinkable film for various sausages, and fresh-keeping film based on polyvinyl alcohol pva. These types of manufacturing generally uses JOYFORCE PVA 1788.