In the manufacturing world, specific materials are preferred for producing specific products. While those materials may have positive characteristics such as malleability, strength, and heat resistance, for example, they may not have the surface energy to accept adhesives, coatings, paints, or printing well. If those treatments don’t adhere properly, they peel, flake, and fail. The result is a low-quality product.
The low surface energy of certain materials often leads to poor adhesion of inks, glues, and coatings because they possess significantly high surface energies. To achieve optimum adhesion, it’s vital that the base material’s surface energy is equal to or higher than the surface energy of the substance which is applied to it, such as an adhesive or paint. Fortunately, a corona discharge can be used to effectively activate a surface in order to make it more receptive to a coating.
Corona discharge treatments are highly effective on virtually any surface format including dimensional objects, sheets, and roll goods that are handled in a web format. Corona discharges are widely used to treat a variety of materials and products in the plastic film, extrusion, and converting industries, including: