Corona and plasma technologies are modern and environmentally friendly methods used to prepare surfaces for processes such as bonding, painting, and coating. These technologies enhance the energy of material surfaces, providing improved adhesion and processing properties without the use of chemical additives. Here are the key differences and advantages of these two technologies:
Corona Technology:
The corona process uses a high-voltage electric field to increase surface energy. In materials like plastic, rubber, and paper, surface energy is measured in dyne/cm, and the corona process enhances this energy, making the surface more adhesive. It is widely used in industries such as packaging, printing, and lamination. Its non-chemical nature makes it environmentally friendly.
Why is Corona Electron Bombardment Necessary?
Surface Energy of Materials
The most important effect of corona treatment is to change the surface properties of the plastic or film material.
In particular, it is to increase the surface energy of the material to be processed, measured in dyne/cm. Corona systems make this change by applying high voltage to a specific material surface for a certain period of time.
Another way to measure the properties of materials such as printing, bonding and lamination is to control the contact angle of the materials. The contact angle is established on the line defining the adhesion surface between a liquid droplet and a solid.
Full wettability is achieved when the contact angle approaches 0° and the liquid completely “spreads”.
Poor wettability is achieved when the contact angle approaches 180° and liquid forms.
Plasma Technology:
The plasma process is created by ionizing gas and offers more precise results compared to the corona method. This technique modifies the chemical and physical properties of surfaces at a microscopic level. Conducted under low or atmospheric pressure, it is particularly preferred in industries requiring high precision, such as medical devices, automotive, and electronics. Additionally, it provides extra benefits such as cleaning, etching, or adding functional groups to the surface.
Why Is It Used?
- Surface Activation: Increasing surface energy allows materials to bond more effectively with inks, paints, and adhesives.
- Environmentally Friendly: Since no chemical additives are used, it does not harm the environment and is a sustainable solution.
- Wide Range of Applications: It can be used on various materials such as plastic, metal, textile, and glass.
Plasma Application Areas
Differences
The corona process offers a simpler procedure, while plasma technology can perform more specific surface modifications depending on the type of gas and process conditions. This makes plasma technology more suitable for sophisticated applications.
Corona and plasma technologies provide effective and sustainable solutions in surface preparation processes, offering significant advantages in industrial operations. Choosing the right technology depends on your needs and application area.
As Ais Engineering, we provide solutions to your needs regarding corona and plasma technologies. As manufacturers of corona and plasma devices, we select the most suitable device for you and design it to meet your specific requirements. Contact us now for more information about our products and services!