The cast film process is more complex than the blown film process. Cast film requires multiple stretching, coating, and other treatments during the preparation process, which makes the surface state and thickness uniformity of the cast film more critical. Furthermore, cast film is subject to more external forces and environmental influences such as temperature and humidity during use. Therefore, the antistatic masterbatch must have strong antistatic properties to ensure stable product quality.
There are some differences between cast film and blown film in the selection of antistatic masterbatch. Since casting film requires a higher surface quality, the dispersion and uniformity of the antistatic masterbatch need to be superior to ensure the transparency and uniformity of the film surface. Also, since the cast film is susceptible to mechanical tearing during use, the abrasion resistance of the antistatic masterbatch must be considered. For some products that require secondary processing, such as heat sealing and cutting, the antistatic masterbatch must meet heat resistance and peel ability requirements.