Stretch film has a wide range of applications, mainly in conjunction with pallets, to package loose goods and replace small containers. Because it can reduce the cost of bulk cargo transportation and packaging by more than 30%, it is widely used in hardware, minerals, chemical raw materials, fertilizer, medicine, food, and paper, building materials, mechanical and electrical supplies, machinery, textile products, foreign trade and other export. The whole set of products is packaged; in the field of warehouse storage, foreign countries also use stretch-wrapped film tray packaging for three-dimensional storage and transportation to save space and land.