PET film is a kind of film widely used in packaging, printing, film coating and other fields. Its main raw material is polyethylene terephthalate (PET), which is a kind of polyester resin. The manufacturing process of PET film can be divided into several steps:
Material preparation: prepare raw materials such as PET, pigment and other additives according to the requirements of product performance and use.
Extrusion: The prepared materials are extruded by an extruder to form a thin film.
Annealing: The extruded film is annealed to increase its dimensional stability and reduce internal stress.
Slitting: The annealed film is slit into the desired width according to the requirements of use.
Packaging: The PET film is packaged for sale after passing through a series of quality inspections.
The manufacturing process of PET film has high requirements for equipment and technology. The extruder used in the process needs to have high temperature resistance, wear resistance and corrosion resistance to ensure stable production and product quality. In addition, PET film has good tensile strength, impact resistance, chemical resistance and electrical insulation performance, so it is widely used in various fields.
PET film manufacturing has high economic value and market prospects. With the development of the national economy and the improvement of people's living standards, the demand for PET film is increasing in various fields, especially in food packaging and printing fields. Therefore, PET film manufacturing has become one of the important industries in the packaging printing industry.
