50 micron opaque white cast polypropylene films for packaging, medical products, electronics, printing, taping, labeling

50 μm Opaque white cast polypropylene film for food, medical can industrial packaging

Cast polypropylene (CPP) film is a type of plastic film that is produced through a casting process.

It is used in a wide range of flexible packaging applications such as:

1. Food packaging:

CPP film is used for packaging of snacks, bakery goods, meat, cheese, and other food products.

It provides excellent clarity and gloss, making the product inside look fresh and attractive.

2. Medical packaging:

CPP film is used for the packaging of medical devices and products due to its high heat-seal strength,

moisture barrier and resistance to puncture.

3. Industrial packaging:

CPP film is used for the packaging of textiles, stationery items, and other industrial products.

The significant feature of cast polypropylene film is its excellent transparency, high gloss,

and good moisture barriers making it suitable for packaging applications where product visibility is important.

It is also highly durable, flexible, and has excellent sealing properties, making it ideal for applications requiring heat sealing.

Furthermore, CPP film is highly resistant to punctures, tearing, and abrasion, which makes it a reliable option for packaging

applications that face rough handling during transportation.

Additionally, CPP film has good stiffness and dimensional stability, which means it is unlikely to shrink or stretch during

processing or use, which can help to ensure consistent packaging performance. It has also good printability and great clarity

of graphics, which makes it ideal for using visual cues as branding elements on packaging.

The process for producing cast polypropylene (CPP) film involves:

1. Polymerization:

Propylene monomers are polymerized under pressure and high temperature to produce polypropylene resin pellets.

2. Extrusion:

The polypropylene resin pellets are melted and extruded through a flat die to form a thin, continuous sheet.

3. Orientation:

The extruded sheet is stretched across the machine direction (MD) and transverse direction (TD) to improve the mechanical

properties and clarity of the film.

4. Cooling:

The film is cooled down using a cooling roll and stored on a take-up roll.

5. Finishing:

The film is treated with corona discharge or other surface treatments to improve printing quality and adhesion.

Now, coming to the advantages of CPP film over Biaxially Oriented Polypropylene (BOPP) film:

1. Improved sealing properties:

CPP film has better sealing properties due to its higher seal strength, which makes it ideal for use in food packaging applications.

2. Enhanced clarity:

CPP film has better clarity and gloss than BOPP film, which makes it more attractive for use in packaging applications where product

visibility is essential.

3. Better hot tack properties:

CPP film has better hot tack properties, which allows it to be used in high-speed packaging machines where quick sealing is required.

4. Increased heat resistance:

CPP films have greater heat resistance than BOPP films, making them better suited for use in hot-fill and retort packaging applications

where high temperatures are required.

5. Higher puncture resistance:

CPP films have higher puncture resistance than BOPP films, making them more durable and resistant to damage during transportation

and storage.

Overall, CPP film has several advantages over BOPP film, making it a popular choice for a wide range of packaging applications. CPP films' improved sealing properties, clarity, heat resistance, and puncture resistance make them ideal for use in food packaging, as well as in industrial and agricultural packaging applications.