Stretch film companies manufacture their products differently. They use numerous blends of resins resulting in the production of films with different properties. The two processes to achieving the finished product is blown or cast.
Blown films are soft and can be easily stretched. They are noisier while being applied from the roll. This film has great resistance to puncture with good force to load holding power. Blown stretch films are also the lesser expensive of the two.
Cast films are very clear and glossy with a superior appearance. The clarity allows item numbers to be easily read even though it may be wrapped. It’s much stiffer than the blown counterpart, but it doesn’t neck down as much. Cast films are extremely quiet coming off the roll.
Both are suited as hand held or machine applied and come in a wide variety of thickness.