Uses and classification of transparent packaging films

Specific Applications
Protection and Securement
Transparent packaging films, through wrapping or heat sealing, provide protection against dust, moisture, and water. They also tightly wrap products to prevent displacement or movement during transportation or storage. For example, in the tobacco, textile, and automotive industries, they secure products through stretching and retraction, preventing damage caused by uneven force.

Beautification and Theft Prevention
Transparent films are commonly used in packaging products such as clothing and masks. Their high transparency allows for detailed product information, while their self-adhesive design facilitates sealing and enhances anti-counterfeiting and anti-theft capabilities.

Food and Pharmaceutical Packaging
Plastic packaging films (such as LDPE and BOPP) are widely used in food (beverages, frozen foods), pharmaceuticals, and other fields due to their barrier properties and flexibility. Some composite films can replace traditional aluminum-plastic film for meat and dairy product packaging.

Classification
By Material

LDPE: Highly water-resistant and flexible, it accounts for over 40% of plastic packaging film usage and is commonly used in food packaging.

BOPP: Commonly used as the outer layer of composite films, it offers high transparency and mechanical strength. PET: High-temperature resistant and mechanically strong, suitable for vacuum packaging.

By Function

High-barrier film: Nanocoating enhances barrier properties and is used for aseptic packaging (e.g., milk film).
Retort film: High-temperature resistant (e.g., 121°C) and used for retort packaging.
Laminated film: Combining the properties of plastic and metal (e.g., aluminized film) for light- and moisture-resistant packaging.