General CPP Cast Film Composite Packaging Base Film Heat Sealing Film
Production Process of Cast CPP Packaging Film
1.Raw Material Preparation：Food-grade primary polypropylene (PP) raw materials are adopted to ensure the material is safe and non-toxic, complying with international food contact standards, and guaranteeing packaging safety from the source.
2.Melting and Extrusion：The raw materials are put into the extruder, melted and plasticized at high temperature, then uniformly extruded through high-end precision dies. The dies precisely control the film material flow channel, laying the foundation for film uniformity.
3.Cast Forming：The extruded film material is attached to the cooling roller for rapid cooling and shaping, forming the initial film shape and ensuring the film's flatness and physical properties.
4.On-line Thickness Measurement and Adjustment：The on-line thickness measurement system monitors the film thickness in real time, and the data is synchronously fed back to the control system to automatically fine-tune production parameters. This ensures the thickness deviation of the full-width film is controlled within a very small range, guaranteeing product consistency.
5.Winding and Cutting：The film qualified by thickness measurement is accurately wound, and then cut into different specifications according to requirements, finally producing high-quality cast CPP packaging film.
Applicable Packaging Scenarios
With stable physical properties and wide adaptability, the general-purpose cast CPP packaging film can meet various packaging needs, including but not limited to:
1.Anti-fog Packaging: Suitable for packaging products such as fruits and vegetables that are prone to fog due to temperature differences, helping to maintain the clarity of the film surface.
2.Fresh Flower Packaging: With certain air permeability, it can be used for fresh flower preservation packaging to slow down the decay rate of flowers.
3.Retort Packaging: Some specifications of products can withstand a certain temperature, suitable for packaging scenarios of food that needs low-temperature retorting.
4.High-speed Automatic Packaging: With high flatness and strong tensile resistance, it can adapt to high-speed packaging equipment and improve production efficiency.
5.Tissue Packaging: It has good flexibility and sealing, and can be used for the outer packaging of sanitary products such as toilet paper and facial tissue.
6.Matte Film: It can be processed into a matte effect through subsequent processing, meeting the packaging needs of gifts, cosmetics and other products that require appearance texture.
7.High-friction Automatic Packaging: The friction coefficient of the film surface can be adjusted to adapt to the traction and sealing process of the automatic packaging machine, avoiding packaging misalignment.
8.Cold-resistant Packaging: It can still maintain good toughness in low-temperature environments, suitable for packaging scenarios of frozen food and low-temperature transportation.
