Biaxial stretching is a process in the production of plastic films, which enhances their mechanical properties and prepares them for further refinement. Integral to this process is corona treatment, a technique that significantly elevates the film's surface tension, rendering it more receptive to subsequent procedures like printing, lamination, and coating.
The corona treatment system typically consists of a mainframe, transformer, and discharge rack. In the midst of treatment, the film navigates through a series of rollers. It is here that a potent combination of high-voltage and high-frequency electrical signals is administered, leading to the ionization of air between electrodes and the consequent generation of plasma. This plasma barrage interacts with the film's surface, instigating a series of chemical bond disruptions and oxidation reactions that collectively boost the film's surface energy.
The effectiveness of corona treatment is influenced by series of factors such as treatment voltage, frequency, electrode spacing, treatment time, and temperature. It is better to immediately proceed with printing, lamination, or adhesion after treatment to prevent the effects from diminishing.
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- Corona GeneratorCorona treatment is a surface electric discharge process that enhances the adhesion of plastic or metallized films. Most plastic films (such as polyolefin films) are non-polar polymers with low surface tension. Corona treatment is used to increase the surface energy of these films, as known inks and adhesives cannot adhere firmly to their surfaces in normal conditions.
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- Corona Treatment StationCorona treatment station, also known as discharge station or discharge treater, is a crucial component of the corona treatment system, commonly used in the corona treatment for materials such as plastic films, metal foils, sheets, and paper. Sanxin offers various types of corona treatment stations for customers to choose from, including double-sided, single-sided, side-open, full-closed, semi-closed, and full-open discharge treaters.