80uM Yellow Cast Polypropylene Film Heat Resistance GN/T 6672

80 μm yellow cast polypropylene film for food, medical can industrial packaging

80-micron translucent yellow or opaque yellow cast polypropylene (CPP) film is a thicker and stronger packaging material than

both 50-micron and 60-micron CPP films. Here are some primary uses of 80-micron translucent or opaque yellow CPP film:

1. Heavy-Duty Packaging:

    80-micron CPP film is sturdy enough to withstand the weight and pressure of heavy-duty products like construction equipment and

    machinery parts, making it ideal for heavy-duty packaging.

2. Frozen Food Packaging:

    The high moisture and gas barrier properties of 80-micron CPP film make it ideal for packaging frozen fruits, vegetables, meat, and

    other food products.

3. Medical and Pharmaceutical Packaging:

    The high barrier properties of 80-micron CPP film make it ideal for packaging medical and pharmaceutical products that require

    protection from environmental factors such as moisture, dust, and other contaminants.

4. Industrial Packaging:

    80-micron CPP film is suitable for the packaging of industrial products like automotive parts, metal hardware, and other heavy-duty items.

    The film's thickness ensures that the contents remain safe and secure during transportation and handling.

5. Gift and Handicraft Packaging:

    The thickness of 80-micron CPP film and its high clarity make it an ideal choice for packaging handicrafts and gifts.

    The yellow color of the film provides an attractive visual appeal, making it an excellent choice for gift wrapping purposes.

6. Stationery Packaging:

    The thickness of 80-micron CPP film makes it an ideal choice for packing and protecting stationery items like pens, pencils, and markers

    during transportation and handling.

Overall, 80-micron translucent yellow or opaque yellow cast polypropylene film is a strong and sturdy packaging material, making it ideal for

heavy-duty and industrial packaging. Its high barrier properties make it suitable for the packaging of frozen food, medical and pharmaceutical

products. Additionally, the thickness and clarity of the film make it an attractive option for gift wrapping and stationery packaging.

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. 

There are various ways to improve the mechanical properties of cast polypropylene (CPP) film and to enhance its functionality.

Here are some of them:

1. Additives:

    Adding certain additives to the CPP film can significantly improve its performance properties. For example, adding slip agents to CPP film

    can reduce friction and enhance its slip properties. Similarly, adding anti-block agents can help to reduce blocking and improve film clarity.

2. Blending:

    Mixing polypropylene with other polymers or fillers can improve film properties such as puncture resistance, tear strength, and stiffness.

    For example, blending polypropylene with polyethylene or thermoplastic elastomers (TPE) can provide a balance of stiffness and flexibility.

3. Coating or laminating:

    Coating or laminating the CPP film with other materials can help to enhance its barrier properties or surface properties such as printability.

    For example, coating the film with metal or oxide layers can improve its barrier properties, while laminating it with another polymer can improve

    its printability or add other properties.

4. Nano-composite materials:

    Incorporating high-performance nano-composite materials into CPP films can improve their mechanical properties and enhance their

    functionality. For example, adding graphene or carbon nanotubes to CPP film can provide high tensile strength and conductivity.

5. Film orientation:

    Stretched or oriented CPP films are stronger and more resistant to punctures and tearing than non-stretched films.

    Orientation can be done mechanically, such as by stretching the film in two directions or by adding a biaxial stretching process, or by adding

    some treatments like Corona treatment.

Overall, the methods to increase the mechanical properties or other functions of CPP films involve the addition of additives, blending, coating, laminating, and orientation. Tailoring the film's formulation and processing conditions can achieve the desired properties and functionality in the CPP film.