Stretch film is strong and tough, with high impact resistance and penetration strength, good self-adhesive properties, transparency, and does not expand the volume of goods after packaging in aluminum-plastic vacuum bags. It can withstand shock and moisture, and has strong protection. It is a very popular packaging form internationally. Stretch film is widely used for wrapping products such as food, tobacco, and pharmaceuticals. There are various types and functions of stretch film, and packaging equipment that uses flexible packaging to wrap all or part of the product is collectively referred to as wrapping. PE stretch film is one of the most important components in the packaging industry.
Using stretch film for packaging can greatly reduce the production cost of enterprises, as well as reduce the labor intensity of workers, improve packaging efficiency and packaging grade. Manual stretch film only requires a handheld unwinding rack with damping brake, and one person can wrap around it by hand, which is lightweight and flexible, suitable for local conditions. Machine stretch film is suitable for batch packaging of goods. If used with winding machines, it will greatly improve production efficiency, make the packaging appearance uniform and beautiful, and ensure good packaging quality and speed.
Stretch film does not require heat shrinkage treatment during the packaging process, which is beneficial for saving energy, reducing packaging costs, facilitating container transportation, and improving logistics efficiency. The "integrated loading and unloading" method combining pallets and forklifts reduces transportation costs, while high transparency also facilitates the identification of packaged items and reduces delivery errors. The production process conditions of the casting method include long and narrow flow channels, fast flow speed, and generally controlled melt temperature range of 250 ℃ to 280 ℃. The temperature of the casting cooling roller is controlled at 20 ℃ to 30 ℃. The winding tension should be low, generally within 10kg, to facilitate the migration of the adhesive and reduce the internal stress of the finished film.
Stretch film has a wide range of applications, mainly used in conjunction with pallets to package scattered goods in bulk, replacing small containers. Due to its ability to reduce the packaging cost of bulk goods transportation by more than 30%, it is widely used in the integrated packaging of various products such as hardware, minerals, chemicals, pharmaceuticals, food, machinery, etc; In the field of warehouse storage, foreign countries also commonly use stretch film pallet packaging for three-dimensional storage and transportation to save space and land.
