PE PET composite film rolls are used for food packaging.

Definition and application

1. Definition: Roll film refers to packaging film supplied in roll form in the packaging industry. It can also refer to the act of rolling up the film, though this usage is relatively uncommon.

2. Applications: Roll film is primarily used in automatic packaging machines, such as for bagged shampoo and certain types of wet wipes. Additionally, in small shops selling cup-style tea, porridge, and similar products, on-site packaging sealing machines often use roll film for sealing. The most common type of roll film packaging is bottle packaging, particularly for non-cylindrical, irregularly shaped bottles, which typically utilise heat-shrinkable roll film.

Types and materials

1. Types: Depending on the material and application, roll film can be divided into various types, such as PVC shrink film rolls, OPP film rolls, PE film rolls, PET protective film, and composite roll film.

2. Materials: The primary raw material for roll film is polyethylene, including low-density polyethylene (LDPE) and linear low-density polyethylene (LLDPE). These materials possess properties such as oxidation resistance, UV resistance, and corrosion resistance, making them suitable for roll film production. Additionally, food-grade materials such as polyethylene (PE), polypropylene (PP), and polyvinyl chloride (PVC) are commonly used in food packaging roll film.

Production process and flow

1. Extrusion: Heat the raw materials and form a continuous film through the extrusion production line.

2. Laminating and printing: Add the necessary composite layers and print patterns on the film.

3. Winding: Wind the processed film into rolls.