Material Profile
Plastic film manufactured by extruding a molten polymer through a flat die onto a chilled roll provides high clarity and heat-sealability for flexible packaging. Commonly known as cast polypropylene, this unoriented material offers excellent puncture resistance and high gloss compared to its biaxially oriented counterparts. The polymer lacks molecular orientation, meaning the physical properties remain relatively uniform in both machine and transverse directions.
Processing Advantage
Extrusion through a flat die onto a polished chill roll avoids the molecular stretching that occurs in blown film production. Rapid quenching ensures that cast polypropylene has low haze and high transparency. This method holds tight gauge tolerances across the web.
Industrial Application
Converters select this material for high-temperature applications including retort pouches and lamination layers. The temperature resistance of cast polypropylene allows packaging to survive sterilization without losing structural integrity or seal strength. Food contact safety and barrier properties make it suitable for bread bags and protective overwrap.
These properties ensure that the film retains its clarity and protective barrier function even after undergoing thermal treatment, satisfying the demanding requirements of medical and food packaging lines. Additionally, its high coefficient of friction can be adjusted with slip additives to optimize performance on high-speed filling machines.
