Stretch film is a kind of packaging method that uses mechanical stretching device to forcibly stretch the film at room temperature to wrap goods tightly for transportation and storage. It is currently a very popular packaging in the world. form. It can be widely used in single-piece or pallet packaging of chemical raw materials, fertilizers, food, mechanical and electrical products, light textile products, etc. 　　 Stretch film has the following advantages: 　　 Stretch packaging saves raw materials than shrink packaging, and does not require heat shrink packaging machines to save energy. 　　 High strength, large elasticity, can be wrapped tightly for any geometric shape of goods, and can avoid damage to the goods caused by bundling, with good anti-loosening, rain-proof, dust-proof, anti-theft and other effects. 　　 High-performance resin and auxiliary materials can be used to meet the needs of different users in the largest range. 　　 It can manufacture single-sided sticky products to reduce the noise generated during winding and stretching, and reduce dust and sand during transportation and storage.