Is it better to use a plasma cleaning machine or a corona machine before printing plastic film adhesive?

When plasma gas is a gas that cannot produce polymer monomer molecules, such as air, oxygen, water vapor, inert gases, and carbon dioxide, it is necessary to introduce functional groups on the surface of the material to give it different properties. The introduction of polar functional groups and surface polymerization reactions caused by plasma are also common methods for plastic surface modification using low-temperature plasma cleaning technology. Plastic film, as a widely used material, has the advantages of light weight, transparency, and good flexibility, but its surface properties are low, making it difficult to effectively bond and print. In order to improve these shortcomings, plasma cleaning equipment has become an ideal solution. Plasma cleaning equipment is a low-temperature surface treatment cleaning technology that utilizes high-energy particles in plasma to undergo physical and chemical reactions with the surface of plastic films. After plasma cleaning treatment, the surface adhesion and permeability of plastic film can be significantly enhanced, creating favorable conditions for subsequent bonding and printing processes. Next, we will introduce the process steps and application advantages of plasma cleaning equipment on the surface of plastic film.

The specific steps of low-temperature plasma cleaning machine in the field of plastic film are as follows: 

1. Preparation stage: Place plastic film in the processing room of the plasma cleaning machine to ensure that the surface of the film is clean and free of obvious pollutants.

2. Gas introduction: Select appropriate process gases such as nitrogen, oxygen, or argon according to processing requirements. In low-pressure environments, these gases are more easily ionized, forming plasma.

3. Plasma generation: Under low pressure conditions, the distance between gas molecules increases, and after being electrified, the gas is ionized, forming high-energy plasma. High energy particles in plasma, such as electrons, ions, and free radicals, collide with the surface of plastic films.

4. Surface modification: High energy particles in the plasma can break the chemical bonds on the surface of plastic films and introduce polar groups such as hydroxyl and carboxyl groups. Thus changing the chemical properties of the surface, making it easier to bond with other materials.

5. Pollutant removal: The low-temperature plasma cleaning machine can effectively remove pollutants and oxides on the surface of plastic films through the impact of ion beams. If these impurities exist, they will affect the adhesion of the adhesive. Plasma treatment can make the adhesive better contact the plastic film and form a strong adhesion.

What are the advantages of using plasma cleaning machines to process printed products such as plastic films?

1. After plasma cleaning treatment, the surface adhesion and permeability of plastic film will be significantly improved, and the surface roughness will also change, increasing the contact area with the adhesive and further improving the bonding strength.

2. In the production process of plastic film, plasma cleaning equipment can not only improve surface adhesion, but also be used to enhance the printing performance, coating adhesion, and biocompatibility of the film.

3. Due to the presence of hydrogen, nitrogen, or oxygen components on the surface of the plasma cleaning machine as plasma gases, a large number of polar groups such as amino and carboxyl groups are generated on the plastic surface, thereby improving the hydrophilicity of the plastic material surface;

4. The plasma cleaning machine is designed for surface cleaning of thin films, which can improve their surface roughness and polarity, thereby increasing their adhesion, coating, and printing with other materials.

5. Plasma treatment can improve the conductivity, anti-static and insulation properties of thin films,

6. After plasma treatment, the hydrophobicity of the film surface becomes hydrophilic, thereby improving its wettability and absorption capacity.

In summary, plasma cleaning equipment provides an efficient, environmentally friendly, and multifunctional solution for surface treatment of plastic films. It can significantly improve the surface properties of plastic films, enhance the hydrophilicity of plastic surfaces, improve the adhesion of difficult to stick plastics, enhance the biocompatibility of plastics, and improve the conductivity of plastic surfaces.