Stretch film is primarily made from linear low-density polyethylene (LLDPE), chosen for its stretch properties and strength. Other formulations may include blends of different types of polyethylene or additives to enhance performance characteristics like UV resistance or cling.Stretch film is primarily made from linear low-density polyethylene (LLDPE), chosen for its stretch properties and strength. Other formulations may include blends of different types of polyethylene or additives to enhance performance characteristics like UV resistance or cling.In this variant, air is introduced into the extruded film to form a bubble, which is then collapsed and wound. This method enhances the film's strength and stretchability. Casting: Alternatively, the molten polymer can be extruded through a flat die and passed onto a chilled roller. Cast films are known for their clarity and superior tear resistance.  Stretch film is designed to be highly elastic, allowing it to stretch significantly while maintaining its integrity. This stretchability enables it to tightly secure loads, providing excellent stability.After stretching, the film has a tendency to return to its original size. This memory effect helps the film to stay tight around the products, ensuring sustained load stability.The most common use of stretch film is in pallet wrapping to secure loads for transportation and storage, ensuring that items remain tightly bound and protected.