Blow molding is an innovative plastic processing technique that transforms plastic granules into a film. The process begins with the heating and melting of these granules, followed by their extrusion into a tubular film precursor. This precursor is then expanded to the required thickness using high-pressure air, ensuring an optimal molten flow state. The final step involves cooling and setting the material, culminating in the creation of a robust and functional film."

Corona treatment is widely used in blow molding operations, designed to boost the adhesion properties of plastic films. This is particularly beneficial for resolving common adhesion challenges encountered during the printing of polypropylene or polyethylene films. The process employs a sophisticated electrostatic discharge mechanism that elevates the surface tension of the film. As a result, the film's surface becomes exceptionally receptive to various treatments, including coating, printing, or bonding with diverse materials. By optimizing the film's wettability, corona treatment not only augments the adherence of inks and coatings but also substantially elevates the product's overall quality and aesthetic appeal.

Corona treatment can effectively remove static electricity from the plastic surface, reducing the adhesion of dust and impurities, and enhancing the overall quality of the product. The surface of the plastic film treated with corona will form a uniform layer of oxide film, which enhances its abrasion resistance and weather resistance, extending the lifespan of the plastic products. Corona treatment can improve the surface smoothness and ink absorption, resulting in clearer and more durable printing effects.