A corona treatment system, also known as a corona system, is a surface treatment device used to address quality issues such as deinking and debonding during plastic film production. It is primarily used in the pre-printing and coating pretreatment of low-surface-energy plastics such as polypropylene and polyethylene. Key manufacturers include Baldwin, Enercon Industries, and Beijing Titanium Technology.
This system uses high-voltage discharge to generate a corona effect, oxidizing the film surface to form reactive groups such as hydroxyl and carbonyl groups, enhancing the adhesion of inks or adhesives. The core structure comprises a generator, a high-voltage transformer, and a processor. It supports continuously adjustable output power from 1000W to 9000W and covers a processing width of 200mm to 1500mm. The equipment utilizes IGBT power converters, operates at a frequency of 20-30kHz, and is equipped with multiple electronic protections and intelligent control features. Some solutions enhance processing stability through roller structure optimization and plasma spraying technology.
The global market size is expected to be approximately RMB 4.9 billion in 2023, with North America being the primary production region. Downstream applications are primarily in the packaging and automotive sectors. Narrow-width products account for 67% of the market share, and the market size is expected to reach 6.9 billion yuan in 2030.