Cast Polypropylene (CPP) foil is a type of polypropylene film that is produced through a casting process. This process involves extruding molten polypropylene through a flat die onto a cooling roll, where it solidifies and is then stretched in the machine's direction. CPP foil is known for its excellent clarity, good mechanical properties, and excellent heat sealability, making it ideal for various packaging applications.
Key Properties of CPP Foil
- High Clarity: CPP films have excellent transparency and gloss, which is beneficial for packaging that requires product visibility.
- Good Mechanical Properties: CPP films offer good strength, flexibility, and tear resistance.
- Excellent Heat Sealability: CPP films can be easily heat-sealed, making them ideal for packaging applications that require secure seals.
- Chemical Resistance: CPP films are resistant to many chemicals, oils, and greases.
- Barrier Properties: While not as strong as BOPP, CPP still provides good moisture and oxygen barrier properties.
Common Applications of CPP Foil
- Food packaging (e.g., bakery products, confectionery, fresh produce)
- Lamination with other films (e.g., BOPP, PET) to enhance barrier properties
- Stationery, textiles, and other consumer goods packaging
