China Suppliers Factory CPP Cast Film for Composite Packaging - Transparent Polypropylene Heat Sealing Film
Production Process of Cast CPP Packaging Film
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.
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.
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.
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.
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
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.
With certain air permeability, it can be used for fresh flower preservation packaging to slow down the decay rate of flowers.
Some specifications of products can withstand a certain temperature, suitable for packaging scenarios of food that needs low-temperature retorting.
With high flatness and strong tensile resistance, it can adapt to high-speed packaging equipment and improve production efficiency.
It has good flexibility and sealing, and can be used for the outer packaging of sanitary products such as toilet paper and facial tissue.
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.
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.
It can still maintain good toughness in low-temperature environments, suitable for packaging scenarios of frozen food and low-temperature transportation.
Frequently Asked Questions (FAQ)
We adopt food-grade primary polypropylene (PP) raw materials to ensure the film is safe, non-toxic, and compliant with international food contact standards.
We utilize an on-line thickness measurement system that monitors the film thickness in real time. The feedback data is used to automatically adjust production parameters, ensuring thickness deviation is kept within a very small range.
Yes. The film is ideal for anti-fog packaging to maintain clarity for fruits and vegetables, and its specific air permeability helps slow down the decay rate of fresh flowers.
Absolutely. With its high flatness, strong tensile resistance, and adjustable surface friction coefficient, our Cast CPP film adapts perfectly to high-speed packaging machinery without misalignment.
Yes, we offer cold-resistant specifications that maintain excellent toughness and physical properties in low-temperature environments, making them suitable for frozen food and cold chain transportation.